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https://github.com/vim/vim
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Problem: missing out-of-memory test in buf_write() Solution: Check that the returned allocated buffer is not NULL (John Marriott) closes: #16678 Signed-off-by: John Marriott <basilisk@internode.on.net> Signed-off-by: Christian Brabandt <cb@256bit.org>
2653 lines
69 KiB
C
2653 lines
69 KiB
C
/* vi:set ts=8 sts=4 sw=4 noet:
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*
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* VIM - Vi IMproved by Bram Moolenaar
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*
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* Do ":help uganda" in Vim to read copying and usage conditions.
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* Do ":help credits" in Vim to see a list of people who contributed.
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* See README.txt for an overview of the Vim source code.
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*/
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/*
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* bufwrite.c: functions for writing a buffer
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*/
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#include "vim.h"
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#if defined(HAVE_UTIME) && defined(HAVE_UTIME_H)
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# include <utime.h> // for struct utimbuf
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#endif
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#define SMALLBUFSIZE 256 // size of emergency write buffer
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/*
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* Structure to pass arguments from buf_write() to buf_write_bytes().
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*/
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struct bw_info
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{
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int bw_fd; // file descriptor
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char_u *bw_buf; // buffer with data to be written
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int bw_len; // length of data
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int bw_flags; // FIO_ flags
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#ifdef FEAT_CRYPT
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buf_T *bw_buffer; // buffer being written
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int bw_finish; // finish encrypting
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#endif
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char_u bw_rest[CONV_RESTLEN]; // not converted bytes
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int bw_restlen; // nr of bytes in bw_rest[]
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int bw_first; // first write call
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char_u *bw_conv_buf; // buffer for writing converted chars
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size_t bw_conv_buflen; // size of bw_conv_buf
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int bw_conv_error; // set for conversion error
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linenr_T bw_conv_error_lnum; // first line with error or zero
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linenr_T bw_start_lnum; // line number at start of buffer
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#ifdef USE_ICONV
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iconv_t bw_iconv_fd; // descriptor for iconv() or -1
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#endif
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};
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/*
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* Convert a Unicode character to bytes.
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* Return TRUE for an error, FALSE when it's OK.
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*/
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static int
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ucs2bytes(
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unsigned c, // in: character
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char_u **pp, // in/out: pointer to result
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int flags) // FIO_ flags
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{
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char_u *p = *pp;
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int error = FALSE;
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int cc;
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if (flags & FIO_UCS4)
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{
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if (flags & FIO_ENDIAN_L)
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{
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*p++ = c;
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*p++ = (c >> 8);
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*p++ = (c >> 16);
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*p++ = (c >> 24);
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}
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else
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{
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*p++ = (c >> 24);
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*p++ = (c >> 16);
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*p++ = (c >> 8);
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*p++ = c;
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}
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}
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else if (flags & (FIO_UCS2 | FIO_UTF16))
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{
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if (c >= 0x10000)
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{
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if (flags & FIO_UTF16)
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{
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// Make two words, ten bits of the character in each. First
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// word is 0xd800 - 0xdbff, second one 0xdc00 - 0xdfff
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c -= 0x10000;
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if (c >= 0x100000)
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error = TRUE;
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cc = ((c >> 10) & 0x3ff) + 0xd800;
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if (flags & FIO_ENDIAN_L)
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{
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*p++ = cc;
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*p++ = ((unsigned)cc >> 8);
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}
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else
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{
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*p++ = ((unsigned)cc >> 8);
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*p++ = cc;
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}
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c = (c & 0x3ff) + 0xdc00;
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}
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else
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error = TRUE;
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}
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if (flags & FIO_ENDIAN_L)
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{
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*p++ = c;
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*p++ = (c >> 8);
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}
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else
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{
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*p++ = (c >> 8);
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*p++ = c;
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}
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}
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else // Latin1
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{
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if (c >= 0x100)
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{
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error = TRUE;
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*p++ = 0xBF;
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}
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else
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*p++ = c;
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}
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*pp = p;
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return error;
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}
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/*
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* Call write() to write a number of bytes to the file.
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* Handles encryption and 'encoding' conversion.
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*
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* Return FAIL for failure, OK otherwise.
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*/
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static int
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buf_write_bytes(struct bw_info *ip)
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{
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int wlen;
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char_u *buf = ip->bw_buf; // data to write
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int len = ip->bw_len; // length of data
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int flags = ip->bw_flags; // extra flags
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// Skip conversion when writing the crypt magic number or the BOM.
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if (!(flags & FIO_NOCONVERT))
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{
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char_u *p;
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unsigned c;
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int n;
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if (flags & FIO_UTF8)
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{
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// Convert latin1 in the buffer to UTF-8 in the file.
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p = ip->bw_conv_buf; // translate to buffer
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for (wlen = 0; wlen < len; ++wlen)
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p += utf_char2bytes(buf[wlen], p);
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buf = ip->bw_conv_buf;
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len = (int)(p - ip->bw_conv_buf);
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}
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else if (flags & (FIO_UCS4 | FIO_UTF16 | FIO_UCS2 | FIO_LATIN1))
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{
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// Convert UTF-8 bytes in the buffer to UCS-2, UCS-4, UTF-16 or
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// Latin1 chars in the file.
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if (flags & FIO_LATIN1)
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p = buf; // translate in-place (can only get shorter)
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else
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p = ip->bw_conv_buf; // translate to buffer
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for (wlen = 0; wlen < len; wlen += n)
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{
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if (wlen == 0 && ip->bw_restlen != 0)
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{
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int l;
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// Use remainder of previous call. Append the start of
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// buf[] to get a full sequence. Might still be too
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// short!
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l = CONV_RESTLEN - ip->bw_restlen;
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if (l > len)
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l = len;
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mch_memmove(ip->bw_rest + ip->bw_restlen, buf, (size_t)l);
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n = utf_ptr2len_len(ip->bw_rest, ip->bw_restlen + l);
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if (n > ip->bw_restlen + len)
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{
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// We have an incomplete byte sequence at the end to
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// be written. We can't convert it without the
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// remaining bytes. Keep them for the next call.
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if (ip->bw_restlen + len > CONV_RESTLEN)
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return FAIL;
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ip->bw_restlen += len;
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break;
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}
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if (n > 1)
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c = utf_ptr2char(ip->bw_rest);
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else
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c = ip->bw_rest[0];
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if (n >= ip->bw_restlen)
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{
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n -= ip->bw_restlen;
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ip->bw_restlen = 0;
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}
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else
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{
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ip->bw_restlen -= n;
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mch_memmove(ip->bw_rest, ip->bw_rest + n,
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(size_t)ip->bw_restlen);
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n = 0;
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}
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}
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else
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{
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n = utf_ptr2len_len(buf + wlen, len - wlen);
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if (n > len - wlen)
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{
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// We have an incomplete byte sequence at the end to
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// be written. We can't convert it without the
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// remaining bytes. Keep them for the next call.
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if (len - wlen > CONV_RESTLEN)
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return FAIL;
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ip->bw_restlen = len - wlen;
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mch_memmove(ip->bw_rest, buf + wlen,
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(size_t)ip->bw_restlen);
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break;
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}
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if (n > 1)
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c = utf_ptr2char(buf + wlen);
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else
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c = buf[wlen];
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}
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if (ucs2bytes(c, &p, flags) && !ip->bw_conv_error)
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{
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ip->bw_conv_error = TRUE;
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ip->bw_conv_error_lnum = ip->bw_start_lnum;
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}
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if (c == NL)
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++ip->bw_start_lnum;
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}
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if (flags & FIO_LATIN1)
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len = (int)(p - buf);
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else
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{
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buf = ip->bw_conv_buf;
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len = (int)(p - ip->bw_conv_buf);
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}
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}
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#ifdef MSWIN
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else if (flags & FIO_CODEPAGE)
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{
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// Convert UTF-8 or codepage to UCS-2 and then to MS-Windows
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// codepage.
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char_u *from;
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size_t fromlen;
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char_u *to;
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int u8c;
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BOOL bad = FALSE;
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int needed;
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if (ip->bw_restlen > 0)
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{
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// Need to concatenate the remainder of the previous call and
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// the bytes of the current call. Use the end of the
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// conversion buffer for this.
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fromlen = len + ip->bw_restlen;
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from = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
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mch_memmove(from, ip->bw_rest, (size_t)ip->bw_restlen);
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mch_memmove(from + ip->bw_restlen, buf, (size_t)len);
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}
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else
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{
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from = buf;
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fromlen = len;
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}
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to = ip->bw_conv_buf;
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if (enc_utf8)
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{
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// Convert from UTF-8 to UCS-2, to the start of the buffer.
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// The buffer has been allocated to be big enough.
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while (fromlen > 0)
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{
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n = (int)utf_ptr2len_len(from, (int)fromlen);
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if (n > (int)fromlen) // incomplete byte sequence
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break;
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u8c = utf_ptr2char(from);
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*to++ = (u8c & 0xff);
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*to++ = (u8c >> 8);
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fromlen -= n;
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from += n;
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}
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// Copy remainder to ip->bw_rest[] to be used for the next
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// call.
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if (fromlen > CONV_RESTLEN)
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{
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// weird overlong sequence
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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mch_memmove(ip->bw_rest, from, fromlen);
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ip->bw_restlen = (int)fromlen;
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}
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else
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{
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// Convert from enc_codepage to UCS-2, to the start of the
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// buffer. The buffer has been allocated to be big enough.
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ip->bw_restlen = 0;
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needed = MultiByteToWideChar(enc_codepage,
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MB_ERR_INVALID_CHARS, (LPCSTR)from, (int)fromlen,
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NULL, 0);
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if (needed == 0)
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{
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// When conversion fails there may be a trailing byte.
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needed = MultiByteToWideChar(enc_codepage,
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MB_ERR_INVALID_CHARS, (LPCSTR)from, (int)fromlen - 1,
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NULL, 0);
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if (needed == 0)
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{
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// Conversion doesn't work.
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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// Save the trailing byte for the next call.
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ip->bw_rest[0] = from[fromlen - 1];
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ip->bw_restlen = 1;
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}
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needed = MultiByteToWideChar(enc_codepage, MB_ERR_INVALID_CHARS,
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(LPCSTR)from, (int)(fromlen - ip->bw_restlen),
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(LPWSTR)to, needed);
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if (needed == 0)
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{
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// Safety check: Conversion doesn't work.
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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to += needed * 2;
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}
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fromlen = to - ip->bw_conv_buf;
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buf = to;
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# ifdef CP_UTF8 // VC 4.1 doesn't define CP_UTF8
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if (FIO_GET_CP(flags) == CP_UTF8)
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{
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// Convert from UCS-2 to UTF-8, using the remainder of the
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// conversion buffer. Fails when out of space.
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for (from = ip->bw_conv_buf; fromlen > 1; fromlen -= 2)
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{
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u8c = *from++;
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u8c += (*from++ << 8);
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to += utf_char2bytes(u8c, to);
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if (to + 6 >= ip->bw_conv_buf + ip->bw_conv_buflen)
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{
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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}
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len = (int)(to - buf);
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}
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else
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# endif
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{
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// Convert from UCS-2 to the codepage, using the remainder of
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// the conversion buffer. If the conversion uses the default
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// character "0", the data doesn't fit in this encoding, so
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// fail.
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len = WideCharToMultiByte(FIO_GET_CP(flags), 0,
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(LPCWSTR)ip->bw_conv_buf, (int)fromlen / sizeof(WCHAR),
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(LPSTR)to, (int)(ip->bw_conv_buflen - fromlen), 0,
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&bad);
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if (bad)
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{
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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}
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}
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#endif
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#ifdef MACOS_CONVERT
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else if (flags & FIO_MACROMAN)
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{
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// Convert UTF-8 or latin1 to Apple MacRoman.
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char_u *from;
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size_t fromlen;
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if (ip->bw_restlen > 0)
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{
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// Need to concatenate the remainder of the previous call and
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// the bytes of the current call. Use the end of the
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// conversion buffer for this.
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fromlen = len + ip->bw_restlen;
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from = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
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mch_memmove(from, ip->bw_rest, (size_t)ip->bw_restlen);
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mch_memmove(from + ip->bw_restlen, buf, (size_t)len);
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}
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else
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{
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from = buf;
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fromlen = len;
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}
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if (enc2macroman(from, fromlen,
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ip->bw_conv_buf, &len, ip->bw_conv_buflen,
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ip->bw_rest, &ip->bw_restlen) == FAIL)
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{
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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buf = ip->bw_conv_buf;
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}
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#endif
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#ifdef USE_ICONV
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if (ip->bw_iconv_fd != (iconv_t)-1)
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{
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const char *from;
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size_t fromlen;
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char *to;
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size_t tolen;
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// Convert with iconv().
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if (ip->bw_restlen > 0)
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{
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char *fp;
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// Need to concatenate the remainder of the previous call and
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// the bytes of the current call. Use the end of the
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// conversion buffer for this.
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fromlen = len + ip->bw_restlen;
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fp = (char *)ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
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mch_memmove(fp, ip->bw_rest, (size_t)ip->bw_restlen);
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mch_memmove(fp + ip->bw_restlen, buf, (size_t)len);
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from = fp;
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tolen = ip->bw_conv_buflen - fromlen;
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}
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else
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{
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from = (const char *)buf;
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fromlen = len;
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tolen = ip->bw_conv_buflen;
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}
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to = (char *)ip->bw_conv_buf;
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if (ip->bw_first)
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{
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size_t save_len = tolen;
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// output the initial shift state sequence
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(void)iconv(ip->bw_iconv_fd, NULL, NULL, &to, &tolen);
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// There is a bug in iconv() on Linux (which appears to be
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// wide-spread) which sets "to" to NULL and messes up "tolen".
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if (to == NULL)
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{
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to = (char *)ip->bw_conv_buf;
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tolen = save_len;
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}
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ip->bw_first = FALSE;
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}
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// If iconv() has an error or there is not enough room, fail.
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if ((iconv(ip->bw_iconv_fd, (void *)&from, &fromlen, &to, &tolen)
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== (size_t)-1 && ICONV_ERRNO != ICONV_EINVAL)
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|| fromlen > CONV_RESTLEN)
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{
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ip->bw_conv_error = TRUE;
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return FAIL;
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}
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// copy remainder to ip->bw_rest[] to be used for the next call.
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if (fromlen > 0)
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mch_memmove(ip->bw_rest, (void *)from, fromlen);
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ip->bw_restlen = (int)fromlen;
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buf = ip->bw_conv_buf;
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len = (int)((char_u *)to - ip->bw_conv_buf);
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}
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#endif
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}
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if (ip->bw_fd < 0)
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// Only checking conversion, which is OK if we get here.
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return OK;
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|
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#ifdef FEAT_CRYPT
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if (flags & FIO_ENCRYPTED)
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{
|
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// Encrypt the data. Do it in-place if possible, otherwise use an
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// allocated buffer.
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# ifdef CRYPT_NOT_INPLACE
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if (crypt_works_inplace(ip->bw_buffer->b_cryptstate))
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{
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# endif
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crypt_encode_inplace(ip->bw_buffer->b_cryptstate, buf, len,
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ip->bw_finish);
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# ifdef CRYPT_NOT_INPLACE
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}
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else
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{
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char_u *outbuf;
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len = crypt_encode_alloc(curbuf->b_cryptstate, buf, len, &outbuf,
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ip->bw_finish);
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if (len == 0)
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return OK; // Crypt layer is buffering, will flush later.
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wlen = write_eintr(ip->bw_fd, outbuf, len);
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vim_free(outbuf);
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return (wlen < len) ? FAIL : OK;
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}
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|
# endif
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|
}
|
|
#endif
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|
wlen = write_eintr(ip->bw_fd, buf, len);
|
|
return (wlen < len) ? FAIL : OK;
|
|
}
|
|
|
|
/*
|
|
* Check modification time of file, before writing to it.
|
|
* The size isn't checked, because using a tool like "gzip" takes care of
|
|
* using the same timestamp but can't set the size.
|
|
*/
|
|
static int
|
|
check_mtime(buf_T *buf, stat_T *st)
|
|
{
|
|
if (buf->b_mtime_read != 0
|
|
&& time_differs(st, buf->b_mtime_read, buf->b_mtime_read_ns))
|
|
{
|
|
msg_scroll = TRUE; // don't overwrite messages here
|
|
msg_silent = 0; // must give this prompt
|
|
// don't use emsg() here, don't want to flush the buffers
|
|
msg_attr(_("WARNING: The file has been changed since reading it!!!"),
|
|
HL_ATTR(HLF_E));
|
|
if (ask_yesno((char_u *)_("Do you really want to write to it"),
|
|
TRUE) == 'n')
|
|
return FAIL;
|
|
msg_scroll = FALSE; // always overwrite the file message now
|
|
}
|
|
return OK;
|
|
}
|
|
|
|
/*
|
|
* Generate a BOM in "buf[4]" for encoding "name".
|
|
* Return the length of the BOM (zero when no BOM).
|
|
*/
|
|
static int
|
|
make_bom(char_u *buf, char_u *name)
|
|
{
|
|
int flags;
|
|
char_u *p;
|
|
|
|
flags = get_fio_flags(name);
|
|
|
|
// Can't put a BOM in a non-Unicode file.
|
|
if (flags == FIO_LATIN1 || flags == 0)
|
|
return 0;
|
|
|
|
if (flags == FIO_UTF8) // UTF-8
|
|
{
|
|
buf[0] = 0xef;
|
|
buf[1] = 0xbb;
|
|
buf[2] = 0xbf;
|
|
return 3;
|
|
}
|
|
p = buf;
|
|
(void)ucs2bytes(0xfeff, &p, flags);
|
|
return (int)(p - buf);
|
|
}
|
|
|
|
#ifdef UNIX
|
|
static void
|
|
set_file_time(
|
|
char_u *fname,
|
|
time_t atime, // access time
|
|
time_t mtime) // modification time
|
|
{
|
|
# if defined(HAVE_UTIME) && defined(HAVE_UTIME_H)
|
|
struct utimbuf buf;
|
|
|
|
buf.actime = atime;
|
|
buf.modtime = mtime;
|
|
(void)utime((char *)fname, &buf);
|
|
# else
|
|
# if defined(HAVE_UTIMES)
|
|
struct timeval tvp[2];
|
|
|
|
tvp[0].tv_sec = atime;
|
|
tvp[0].tv_usec = 0;
|
|
tvp[1].tv_sec = mtime;
|
|
tvp[1].tv_usec = 0;
|
|
# ifdef NeXT
|
|
(void)utimes((char *)fname, tvp);
|
|
# else
|
|
(void)utimes((char *)fname, (const struct timeval *)&tvp);
|
|
# endif
|
|
# endif
|
|
# endif
|
|
}
|
|
#endif // UNIX
|
|
|
|
char *
|
|
new_file_message(void)
|
|
{
|
|
return shortmess(SHM_NEW) ? _("[New]") : _("[New File]");
|
|
}
|
|
|
|
/*
|
|
* buf_write() - write to file "fname" lines "start" through "end"
|
|
*
|
|
* We do our own buffering here because fwrite() is so slow.
|
|
*
|
|
* If "forceit" is true, we don't care for errors when attempting backups.
|
|
* In case of an error everything possible is done to restore the original
|
|
* file. But when "forceit" is TRUE, we risk losing it.
|
|
*
|
|
* When "reset_changed" is TRUE and "append" == FALSE and "start" == 1 and
|
|
* "end" == curbuf->b_ml.ml_line_count, reset curbuf->b_changed.
|
|
*
|
|
* This function must NOT use NameBuff (because it's called by autowrite()).
|
|
*
|
|
* return FAIL for failure, OK otherwise
|
|
*/
|
|
int
|
|
buf_write(
|
|
buf_T *buf,
|
|
char_u *fname,
|
|
char_u *sfname,
|
|
linenr_T start,
|
|
linenr_T end,
|
|
exarg_T *eap, // for forced 'ff' and 'fenc', can be
|
|
// NULL!
|
|
int append, // append to the file
|
|
int forceit,
|
|
int reset_changed,
|
|
int filtering)
|
|
{
|
|
int fd;
|
|
char_u *backup = NULL;
|
|
int backup_copy = FALSE; // copy the original file?
|
|
int dobackup;
|
|
char_u *ffname;
|
|
char_u *wfname = NULL; // name of file to write to
|
|
char_u *s;
|
|
char_u *ptr;
|
|
char_u c;
|
|
int len;
|
|
linenr_T lnum;
|
|
long nchars;
|
|
char_u *errmsg = NULL;
|
|
int errmsg_allocated = FALSE;
|
|
char_u *errnum = NULL;
|
|
char_u *buffer;
|
|
char_u smallbuf[SMALLBUFSIZE];
|
|
char_u *backup_ext;
|
|
int bufsize;
|
|
long perm; // file permissions
|
|
int retval = OK;
|
|
int newfile = FALSE; // TRUE if file doesn't exist yet
|
|
int msg_save = msg_scroll;
|
|
int overwriting; // TRUE if writing over original
|
|
int no_eol = FALSE; // no end-of-line written
|
|
int device = FALSE; // writing to a device
|
|
stat_T st_old;
|
|
int prev_got_int = got_int;
|
|
int checking_conversion;
|
|
int file_readonly = FALSE; // overwritten file is read-only
|
|
#if defined(UNIX) // XXX fix me sometime?
|
|
int made_writable = FALSE; // 'w' bit has been set
|
|
#endif
|
|
// writing everything
|
|
int whole = (start == 1 && end == buf->b_ml.ml_line_count);
|
|
linenr_T old_line_count = buf->b_ml.ml_line_count;
|
|
int attr;
|
|
int fileformat;
|
|
int write_bin;
|
|
struct bw_info write_info; // info for buf_write_bytes()
|
|
int converted = FALSE;
|
|
int notconverted = FALSE;
|
|
char_u *fenc; // effective 'fileencoding'
|
|
char_u *fenc_tofree = NULL; // allocated "fenc"
|
|
int wb_flags = 0;
|
|
#ifdef HAVE_ACL
|
|
vim_acl_T acl = NULL; // ACL copied from original file to
|
|
// backup or new file
|
|
#endif
|
|
#ifdef FEAT_PERSISTENT_UNDO
|
|
int write_undo_file = FALSE;
|
|
context_sha256_T sha_ctx;
|
|
#endif
|
|
unsigned int bkc = get_bkc_flags(buf);
|
|
pos_T orig_start = buf->b_op_start;
|
|
pos_T orig_end = buf->b_op_end;
|
|
|
|
if (fname == NULL || *fname == NUL) // safety check
|
|
return FAIL;
|
|
if (buf->b_ml.ml_mfp == NULL)
|
|
{
|
|
// This can happen during startup when there is a stray "w" in the
|
|
// vimrc file.
|
|
emsg(_(e_empty_buffer));
|
|
return FAIL;
|
|
}
|
|
|
|
// Disallow writing from .exrc and .vimrc in current directory for
|
|
// security reasons.
|
|
if (check_secure())
|
|
return FAIL;
|
|
|
|
// Avoid a crash for a long name.
|
|
if (STRLEN(fname) >= MAXPATHL)
|
|
{
|
|
emsg(_(e_name_too_long));
|
|
return FAIL;
|
|
}
|
|
|
|
// must init bw_conv_buf and bw_iconv_fd before jumping to "fail"
|
|
write_info.bw_conv_buf = NULL;
|
|
write_info.bw_conv_error = FALSE;
|
|
write_info.bw_conv_error_lnum = 0;
|
|
write_info.bw_restlen = 0;
|
|
#ifdef USE_ICONV
|
|
write_info.bw_iconv_fd = (iconv_t)-1;
|
|
#endif
|
|
#ifdef FEAT_CRYPT
|
|
write_info.bw_buffer = buf;
|
|
write_info.bw_finish = FALSE;
|
|
#endif
|
|
|
|
// After writing a file changedtick changes but we don't want to display
|
|
// the line.
|
|
ex_no_reprint = TRUE;
|
|
|
|
// If there is no file name yet, use the one for the written file.
|
|
// BF_NOTEDITED is set to reflect this (in case the write fails).
|
|
// Don't do this when the write is for a filter command.
|
|
// Don't do this when appending.
|
|
// Only do this when 'cpoptions' contains the 'F' flag.
|
|
if (buf->b_ffname == NULL
|
|
&& reset_changed
|
|
&& whole
|
|
&& buf == curbuf
|
|
&& !bt_nofilename(buf)
|
|
&& !filtering
|
|
&& (!append || vim_strchr(p_cpo, CPO_FNAMEAPP) != NULL)
|
|
&& vim_strchr(p_cpo, CPO_FNAMEW) != NULL)
|
|
{
|
|
if (set_rw_fname(fname, sfname) == FAIL)
|
|
return FAIL;
|
|
buf = curbuf; // just in case autocmds made "buf" invalid
|
|
}
|
|
|
|
if (sfname == NULL)
|
|
sfname = fname;
|
|
// For Unix: Use the short file name whenever possible.
|
|
// Avoids problems with networks and when directory names are changed.
|
|
// Don't do this for MS-DOS, a "cd" in a sub-shell may have moved us to
|
|
// another directory, which we don't detect
|
|
ffname = fname; // remember full fname
|
|
#ifdef UNIX
|
|
fname = sfname;
|
|
#endif
|
|
|
|
if (buf->b_ffname != NULL && fnamecmp(ffname, buf->b_ffname) == 0)
|
|
overwriting = TRUE;
|
|
else
|
|
overwriting = FALSE;
|
|
|
|
if (exiting)
|
|
settmode(TMODE_COOK); // when exiting allow typeahead now
|
|
|
|
++no_wait_return; // don't wait for return yet
|
|
|
|
// Set '[ and '] marks to the lines to be written.
|
|
buf->b_op_start.lnum = start;
|
|
buf->b_op_start.col = 0;
|
|
buf->b_op_end.lnum = end;
|
|
buf->b_op_end.col = 0;
|
|
|
|
{
|
|
aco_save_T aco;
|
|
int buf_ffname = FALSE;
|
|
int buf_sfname = FALSE;
|
|
int buf_fname_f = FALSE;
|
|
int buf_fname_s = FALSE;
|
|
int did_cmd = FALSE;
|
|
int nofile_err = FALSE;
|
|
int empty_memline = (buf->b_ml.ml_mfp == NULL);
|
|
bufref_T bufref;
|
|
|
|
// Apply PRE autocommands.
|
|
// Set curbuf to the buffer to be written.
|
|
// Careful: The autocommands may call buf_write() recursively!
|
|
if (ffname == buf->b_ffname)
|
|
buf_ffname = TRUE;
|
|
if (sfname == buf->b_sfname)
|
|
buf_sfname = TRUE;
|
|
if (fname == buf->b_ffname)
|
|
buf_fname_f = TRUE;
|
|
if (fname == buf->b_sfname)
|
|
buf_fname_s = TRUE;
|
|
|
|
// Set curwin/curbuf to buf and save a few things.
|
|
aucmd_prepbuf(&aco, buf);
|
|
if (curbuf != buf)
|
|
{
|
|
// Could not find a window for "buf". Doing more might cause
|
|
// problems, better bail out.
|
|
return FAIL;
|
|
}
|
|
|
|
set_bufref(&bufref, buf);
|
|
|
|
if (append)
|
|
{
|
|
if (!(did_cmd = apply_autocmds_exarg(EVENT_FILEAPPENDCMD,
|
|
sfname, sfname, FALSE, curbuf, eap)))
|
|
{
|
|
if (overwriting && bt_nofilename(curbuf))
|
|
nofile_err = TRUE;
|
|
else
|
|
apply_autocmds_exarg(EVENT_FILEAPPENDPRE,
|
|
sfname, sfname, FALSE, curbuf, eap);
|
|
}
|
|
}
|
|
else if (filtering)
|
|
{
|
|
apply_autocmds_exarg(EVENT_FILTERWRITEPRE,
|
|
NULL, sfname, FALSE, curbuf, eap);
|
|
}
|
|
else if (reset_changed && whole)
|
|
{
|
|
int was_changed = curbufIsChanged();
|
|
|
|
did_cmd = apply_autocmds_exarg(EVENT_BUFWRITECMD,
|
|
sfname, sfname, FALSE, curbuf, eap);
|
|
if (did_cmd)
|
|
{
|
|
if (was_changed && !curbufIsChanged())
|
|
{
|
|
// Written everything correctly and BufWriteCmd has reset
|
|
// 'modified': Correct the undo information so that an
|
|
// undo now sets 'modified'.
|
|
u_unchanged(curbuf);
|
|
u_update_save_nr(curbuf);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (overwriting && bt_nofilename(curbuf))
|
|
nofile_err = TRUE;
|
|
else
|
|
apply_autocmds_exarg(EVENT_BUFWRITEPRE,
|
|
sfname, sfname, FALSE, curbuf, eap);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!(did_cmd = apply_autocmds_exarg(EVENT_FILEWRITECMD,
|
|
sfname, sfname, FALSE, curbuf, eap)))
|
|
{
|
|
if (overwriting && bt_nofilename(curbuf))
|
|
nofile_err = TRUE;
|
|
else
|
|
apply_autocmds_exarg(EVENT_FILEWRITEPRE,
|
|
sfname, sfname, FALSE, curbuf, eap);
|
|
}
|
|
}
|
|
|
|
// restore curwin/curbuf and a few other things
|
|
aucmd_restbuf(&aco);
|
|
|
|
// In three situations we return here and don't write the file:
|
|
// 1. the autocommands deleted or unloaded the buffer.
|
|
// 2. The autocommands abort script processing.
|
|
// 3. If one of the "Cmd" autocommands was executed.
|
|
if (!bufref_valid(&bufref))
|
|
buf = NULL;
|
|
if (buf == NULL || (buf->b_ml.ml_mfp == NULL && !empty_memline)
|
|
|| did_cmd || nofile_err
|
|
#ifdef FEAT_EVAL
|
|
|| aborting()
|
|
#endif
|
|
)
|
|
{
|
|
if (buf != NULL && (cmdmod.cmod_flags & CMOD_LOCKMARKS))
|
|
{
|
|
// restore the original '[ and '] positions
|
|
buf->b_op_start = orig_start;
|
|
buf->b_op_end = orig_end;
|
|
}
|
|
|
|
--no_wait_return;
|
|
msg_scroll = msg_save;
|
|
if (nofile_err)
|
|
semsg(_(e_no_matching_autocommands_for_buftype_str_buffer),
|
|
curbuf->b_p_bt);
|
|
|
|
if (nofile_err
|
|
#ifdef FEAT_EVAL
|
|
|| aborting()
|
|
#endif
|
|
)
|
|
// An aborting error, interrupt or exception in the
|
|
// autocommands.
|
|
return FAIL;
|
|
if (did_cmd)
|
|
{
|
|
if (buf == NULL)
|
|
// The buffer was deleted. We assume it was written
|
|
// (can't retry anyway).
|
|
return OK;
|
|
if (overwriting)
|
|
{
|
|
// Assume the buffer was written, update the timestamp.
|
|
ml_timestamp(buf);
|
|
if (append)
|
|
buf->b_flags &= ~BF_NEW;
|
|
else
|
|
buf->b_flags &= ~BF_WRITE_MASK;
|
|
}
|
|
if (reset_changed && buf->b_changed && !append
|
|
&& (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL))
|
|
// Buffer still changed, the autocommands didn't work
|
|
// properly.
|
|
return FAIL;
|
|
return OK;
|
|
}
|
|
#ifdef FEAT_EVAL
|
|
if (!aborting())
|
|
#endif
|
|
emsg(_(e_autocommands_deleted_or_unloaded_buffer_to_be_written));
|
|
return FAIL;
|
|
}
|
|
|
|
// The autocommands may have changed the number of lines in the file.
|
|
// When writing the whole file, adjust the end.
|
|
// When writing part of the file, assume that the autocommands only
|
|
// changed the number of lines that are to be written (tricky!).
|
|
if (buf->b_ml.ml_line_count != old_line_count)
|
|
{
|
|
if (whole) // write all
|
|
end = buf->b_ml.ml_line_count;
|
|
else if (buf->b_ml.ml_line_count > old_line_count) // more lines
|
|
end += buf->b_ml.ml_line_count - old_line_count;
|
|
else // less lines
|
|
{
|
|
end -= old_line_count - buf->b_ml.ml_line_count;
|
|
if (end < start)
|
|
{
|
|
--no_wait_return;
|
|
msg_scroll = msg_save;
|
|
emsg(_(e_autocommands_changed_number_of_lines_in_unexpected_way));
|
|
return FAIL;
|
|
}
|
|
}
|
|
}
|
|
|
|
// The autocommands may have changed the name of the buffer, which may
|
|
// be kept in fname, ffname and sfname.
|
|
if (buf_ffname)
|
|
ffname = buf->b_ffname;
|
|
if (buf_sfname)
|
|
sfname = buf->b_sfname;
|
|
if (buf_fname_f)
|
|
fname = buf->b_ffname;
|
|
if (buf_fname_s)
|
|
fname = buf->b_sfname;
|
|
}
|
|
|
|
if (cmdmod.cmod_flags & CMOD_LOCKMARKS)
|
|
{
|
|
// restore the original '[ and '] positions
|
|
buf->b_op_start = orig_start;
|
|
buf->b_op_end = orig_end;
|
|
}
|
|
|
|
#ifdef FEAT_NETBEANS_INTG
|
|
if (netbeans_active() && isNetbeansBuffer(buf))
|
|
{
|
|
if (whole)
|
|
{
|
|
// b_changed can be 0 after an undo, but we still need to write
|
|
// the buffer to NetBeans.
|
|
if (buf->b_changed || isNetbeansModified(buf))
|
|
{
|
|
--no_wait_return; // may wait for return now
|
|
msg_scroll = msg_save;
|
|
netbeans_save_buffer(buf); // no error checking...
|
|
return retval;
|
|
}
|
|
else
|
|
{
|
|
errnum = (char_u *)"E656: ";
|
|
errmsg = (char_u *)_(e_netbeans_disallows_writes_of_unmodified_buffers);
|
|
buffer = NULL;
|
|
goto fail;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
errnum = (char_u *)"E657: ";
|
|
errmsg = (char_u *)_(e_partial_writes_disallowed_for_netbeans_buffers);
|
|
buffer = NULL;
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
|
|
if (shortmess(SHM_OVER) && !exiting)
|
|
msg_scroll = FALSE; // overwrite previous file message
|
|
else
|
|
msg_scroll = TRUE; // don't overwrite previous file message
|
|
if (!filtering)
|
|
filemess(buf,
|
|
#ifndef UNIX
|
|
sfname,
|
|
#else
|
|
fname,
|
|
#endif
|
|
(char_u *)"", 0); // show that we are busy
|
|
msg_scroll = FALSE; // always overwrite the file message now
|
|
|
|
buffer = alloc(WRITEBUFSIZE);
|
|
if (buffer == NULL) // can't allocate big buffer, use small
|
|
// one (to be able to write when out of
|
|
// memory)
|
|
{
|
|
buffer = smallbuf;
|
|
bufsize = SMALLBUFSIZE;
|
|
}
|
|
else
|
|
bufsize = WRITEBUFSIZE;
|
|
|
|
// Get information about original file (if there is one).
|
|
#if defined(UNIX)
|
|
st_old.st_dev = 0;
|
|
st_old.st_ino = 0;
|
|
perm = -1;
|
|
if (mch_stat((char *)fname, &st_old) < 0)
|
|
newfile = TRUE;
|
|
else
|
|
{
|
|
perm = st_old.st_mode;
|
|
if (!S_ISREG(st_old.st_mode)) // not a file
|
|
{
|
|
if (S_ISDIR(st_old.st_mode))
|
|
{
|
|
errnum = (char_u *)"E502: ";
|
|
errmsg = (char_u *)_(e_is_a_directory);
|
|
goto fail;
|
|
}
|
|
if (mch_nodetype(fname) != NODE_WRITABLE)
|
|
{
|
|
errnum = (char_u *)"E503: ";
|
|
errmsg = (char_u *)_(e_is_not_file_or_writable_device);
|
|
goto fail;
|
|
}
|
|
// It's a device of some kind (or a fifo) which we can write to
|
|
// but for which we can't make a backup.
|
|
device = TRUE;
|
|
newfile = TRUE;
|
|
perm = -1;
|
|
}
|
|
}
|
|
#else // !UNIX
|
|
// Check for a writable device name.
|
|
c = mch_nodetype(fname);
|
|
if (c == NODE_OTHER)
|
|
{
|
|
errnum = (char_u *)"E503: ";
|
|
errmsg = (char_u *)_(e_is_not_file_or_writable_device);
|
|
goto fail;
|
|
}
|
|
if (c == NODE_WRITABLE)
|
|
{
|
|
# if defined(MSWIN)
|
|
// MS-Windows allows opening a device, but we will probably get stuck
|
|
// trying to write to it.
|
|
if (!p_odev)
|
|
{
|
|
errnum = (char_u *)"E796: ";
|
|
errmsg = (char_u *)_(e_writing_to_device_disabled_with_opendevice_option);
|
|
goto fail;
|
|
}
|
|
# endif
|
|
device = TRUE;
|
|
newfile = TRUE;
|
|
perm = -1;
|
|
}
|
|
else
|
|
{
|
|
perm = mch_getperm(fname);
|
|
if (perm < 0)
|
|
newfile = TRUE;
|
|
else if (mch_isdir(fname))
|
|
{
|
|
errnum = (char_u *)"E502: ";
|
|
errmsg = (char_u *)_(e_is_a_directory);
|
|
goto fail;
|
|
}
|
|
if (overwriting)
|
|
(void)mch_stat((char *)fname, &st_old);
|
|
}
|
|
#endif // !UNIX
|
|
|
|
if (!device && !newfile)
|
|
{
|
|
// Check if the file is really writable (when renaming the file to
|
|
// make a backup we won't discover it later).
|
|
file_readonly = check_file_readonly(fname, (int)perm);
|
|
|
|
if (!forceit && file_readonly)
|
|
{
|
|
if (vim_strchr(p_cpo, CPO_FWRITE) != NULL)
|
|
{
|
|
errnum = (char_u *)"E504: ";
|
|
errmsg = (char_u *)_(e_is_read_only_cannot_override_W_in_cpoptions);
|
|
}
|
|
else
|
|
{
|
|
errnum = (char_u *)"E505: ";
|
|
errmsg = (char_u *)_(e_is_read_only_add_bang_to_override);
|
|
}
|
|
goto fail;
|
|
}
|
|
|
|
// Check if the timestamp hasn't changed since reading the file.
|
|
if (overwriting)
|
|
{
|
|
retval = check_mtime(buf, &st_old);
|
|
if (retval == FAIL)
|
|
goto fail;
|
|
}
|
|
}
|
|
|
|
#ifdef HAVE_ACL
|
|
// For systems that support ACL: get the ACL from the original file.
|
|
if (!newfile)
|
|
acl = mch_get_acl(fname);
|
|
#endif
|
|
|
|
// If 'backupskip' is not empty, don't make a backup for some files.
|
|
dobackup = (p_wb || p_bk || *p_pm != NUL);
|
|
if (dobackup && *p_bsk != NUL && match_file_list(p_bsk, sfname, ffname))
|
|
dobackup = FALSE;
|
|
|
|
// Save the value of got_int and reset it. We don't want a previous
|
|
// interruption cancel writing, only hitting CTRL-C while writing should
|
|
// abort it.
|
|
prev_got_int = got_int;
|
|
got_int = FALSE;
|
|
|
|
// Mark the buffer as 'being saved' to prevent changed buffer warnings
|
|
buf->b_saving = TRUE;
|
|
|
|
// If we are not appending or filtering, the file exists, and the
|
|
// 'writebackup', 'backup' or 'patchmode' option is set, need a backup.
|
|
// When 'patchmode' is set also make a backup when appending.
|
|
//
|
|
// Do not make any backup, if 'writebackup' and 'backup' are both switched
|
|
// off. This helps when editing large files on almost-full disks.
|
|
if (!(append && *p_pm == NUL) && !filtering && perm >= 0 && dobackup)
|
|
{
|
|
#if defined(UNIX) || defined(MSWIN)
|
|
stat_T st;
|
|
#endif
|
|
|
|
if ((bkc & BKC_YES) || append) // "yes"
|
|
backup_copy = TRUE;
|
|
#if defined(UNIX) || defined(MSWIN)
|
|
else if ((bkc & BKC_AUTO)) // "auto"
|
|
{
|
|
int i;
|
|
|
|
# ifdef UNIX
|
|
// Don't rename the file when:
|
|
// - it's a hard link
|
|
// - it's a symbolic link
|
|
// - we don't have write permission in the directory
|
|
// - we can't set the owner/group of the new file
|
|
if (st_old.st_nlink > 1
|
|
|| mch_lstat((char *)fname, &st) < 0
|
|
|| st.st_dev != st_old.st_dev
|
|
|| st.st_ino != st_old.st_ino
|
|
# ifndef HAVE_FCHOWN
|
|
|| st.st_uid != st_old.st_uid
|
|
|| st.st_gid != st_old.st_gid
|
|
# endif
|
|
)
|
|
backup_copy = TRUE;
|
|
else
|
|
# else
|
|
# ifdef MSWIN
|
|
// On NTFS file systems hard links are possible.
|
|
if (mch_is_linked(fname))
|
|
backup_copy = TRUE;
|
|
else
|
|
# endif
|
|
# endif
|
|
{
|
|
// Check if we can create a file and set the owner/group to
|
|
// the ones from the original file.
|
|
// First find a file name that doesn't exist yet (use some
|
|
// arbitrary numbers).
|
|
STRCPY(IObuff, fname);
|
|
fd = -1;
|
|
for (i = 4913; ; i += 123)
|
|
{
|
|
sprintf((char *)gettail(IObuff), "%d", i);
|
|
if (mch_lstat((char *)IObuff, &st) < 0)
|
|
{
|
|
fd = mch_open((char *)IObuff,
|
|
O_CREAT|O_WRONLY|O_EXCL|O_NOFOLLOW, perm);
|
|
if (fd < 0 && errno == EEXIST)
|
|
// If the same file name is created by another
|
|
// process between lstat() and open(), find another
|
|
// name.
|
|
continue;
|
|
break;
|
|
}
|
|
}
|
|
if (fd < 0) // can't write in directory
|
|
backup_copy = TRUE;
|
|
else
|
|
{
|
|
# ifdef UNIX
|
|
# ifdef HAVE_FCHOWN
|
|
vim_ignored = fchown(fd, st_old.st_uid, st_old.st_gid);
|
|
# endif
|
|
if (mch_stat((char *)IObuff, &st) < 0
|
|
|| st.st_uid != st_old.st_uid
|
|
|| st.st_gid != st_old.st_gid
|
|
|| (long)st.st_mode != perm)
|
|
backup_copy = TRUE;
|
|
# endif
|
|
// Close the file before removing it, on MS-Windows we
|
|
// can't delete an open file.
|
|
close(fd);
|
|
mch_remove(IObuff);
|
|
# ifdef MSWIN
|
|
// MS-Windows may trigger a virus scanner to open the
|
|
// file, we can't delete it then. Keep trying for half a
|
|
// second.
|
|
{
|
|
int try;
|
|
|
|
for (try = 0; try < 10; ++try)
|
|
{
|
|
if (mch_lstat((char *)IObuff, &st) < 0)
|
|
break;
|
|
ui_delay(50L, TRUE); // wait 50 msec
|
|
mch_remove(IObuff);
|
|
}
|
|
}
|
|
# endif
|
|
}
|
|
}
|
|
}
|
|
|
|
// Break symlinks and/or hardlinks if we've been asked to.
|
|
if ((bkc & BKC_BREAKSYMLINK) || (bkc & BKC_BREAKHARDLINK))
|
|
{
|
|
# ifdef UNIX
|
|
int lstat_res;
|
|
|
|
lstat_res = mch_lstat((char *)fname, &st);
|
|
|
|
// Symlinks.
|
|
if ((bkc & BKC_BREAKSYMLINK)
|
|
&& lstat_res == 0
|
|
&& st.st_ino != st_old.st_ino)
|
|
backup_copy = FALSE;
|
|
|
|
// Hardlinks.
|
|
if ((bkc & BKC_BREAKHARDLINK)
|
|
&& st_old.st_nlink > 1
|
|
&& (lstat_res != 0 || st.st_ino == st_old.st_ino))
|
|
backup_copy = FALSE;
|
|
# else
|
|
# if defined(MSWIN)
|
|
// Symlinks.
|
|
if ((bkc & BKC_BREAKSYMLINK) && mch_is_symbolic_link(fname))
|
|
backup_copy = FALSE;
|
|
|
|
// Hardlinks.
|
|
if ((bkc & BKC_BREAKHARDLINK) && mch_is_hard_link(fname))
|
|
backup_copy = FALSE;
|
|
# endif
|
|
# endif
|
|
}
|
|
|
|
#endif
|
|
|
|
// make sure we have a valid backup extension to use
|
|
if (*p_bex == NUL)
|
|
backup_ext = (char_u *)".bak";
|
|
else
|
|
backup_ext = p_bex;
|
|
|
|
if (backup_copy
|
|
&& (fd = mch_open((char *)fname, O_RDONLY | O_EXTRA, 0)) >= 0)
|
|
{
|
|
int bfd;
|
|
char_u *copybuf, *wp;
|
|
int some_error = FALSE;
|
|
stat_T st_new;
|
|
char_u *dirp;
|
|
char_u *rootname;
|
|
#if defined(UNIX) || defined(MSWIN)
|
|
char_u *p;
|
|
#endif
|
|
#if defined(UNIX)
|
|
int did_set_shortname;
|
|
mode_t umask_save;
|
|
#endif
|
|
|
|
copybuf = alloc(WRITEBUFSIZE + 1);
|
|
if (copybuf == NULL)
|
|
{
|
|
some_error = TRUE; // out of memory
|
|
goto nobackup;
|
|
}
|
|
|
|
// Try to make the backup in each directory in the 'bdir' option.
|
|
//
|
|
// Unix semantics has it, that we may have a writable file,
|
|
// that cannot be recreated with a simple open(..., O_CREAT, ) e.g:
|
|
// - the directory is not writable,
|
|
// - the file may be a symbolic link,
|
|
// - the file may belong to another user/group, etc.
|
|
//
|
|
// For these reasons, the existing writable file must be truncated
|
|
// and reused. Creation of a backup COPY will be attempted.
|
|
dirp = p_bdir;
|
|
while (*dirp)
|
|
{
|
|
#ifdef UNIX
|
|
st_new.st_ino = 0;
|
|
st_new.st_dev = 0;
|
|
st_new.st_gid = 0;
|
|
#endif
|
|
|
|
// Isolate one directory name, using an entry in 'bdir'.
|
|
(void)copy_option_part(&dirp, copybuf, WRITEBUFSIZE, ",");
|
|
|
|
#if defined(UNIX) || defined(MSWIN)
|
|
p = copybuf + STRLEN(copybuf);
|
|
if (after_pathsep(copybuf, p) && p[-1] == p[-2])
|
|
// Ends with '//', use full path
|
|
if ((p = make_percent_swname(copybuf, p, fname)) != NULL)
|
|
{
|
|
backup = modname(p, backup_ext, FALSE);
|
|
vim_free(p);
|
|
}
|
|
#endif
|
|
rootname = get_file_in_dir(fname, copybuf);
|
|
if (rootname == NULL)
|
|
{
|
|
some_error = TRUE; // out of memory
|
|
goto nobackup;
|
|
}
|
|
|
|
#if defined(UNIX)
|
|
did_set_shortname = FALSE;
|
|
#endif
|
|
|
|
// May try twice if 'shortname' not set.
|
|
for (;;)
|
|
{
|
|
// Make the backup file name.
|
|
if (backup == NULL)
|
|
backup = buf_modname((buf->b_p_sn || buf->b_shortname),
|
|
rootname, backup_ext, FALSE);
|
|
if (backup == NULL)
|
|
{
|
|
vim_free(rootname);
|
|
some_error = TRUE; // out of memory
|
|
goto nobackup;
|
|
}
|
|
|
|
// Check if backup file already exists.
|
|
if (mch_stat((char *)backup, &st_new) >= 0)
|
|
{
|
|
#ifdef UNIX
|
|
// Check if backup file is same as original file.
|
|
// May happen when modname() gave the same file back.
|
|
// E.g. silly link, or file name-length reached.
|
|
// If we don't check here, we either ruin the file
|
|
// when copying or erase it after writing. jw.
|
|
if (st_new.st_dev == st_old.st_dev
|
|
&& st_new.st_ino == st_old.st_ino)
|
|
{
|
|
VIM_CLEAR(backup); // no backup file to delete
|
|
// may try again with 'shortname' set
|
|
if (!(buf->b_shortname || buf->b_p_sn))
|
|
{
|
|
buf->b_shortname = TRUE;
|
|
did_set_shortname = TRUE;
|
|
continue;
|
|
}
|
|
// setting shortname didn't help
|
|
if (did_set_shortname)
|
|
buf->b_shortname = FALSE;
|
|
break;
|
|
}
|
|
#endif
|
|
|
|
// If we are not going to keep the backup file, don't
|
|
// delete an existing one, try to use another name.
|
|
// Change one character, just before the extension.
|
|
if (!p_bk)
|
|
{
|
|
wp = backup + STRLEN(backup) - 1
|
|
- STRLEN(backup_ext);
|
|
if (wp < backup) // empty file name ???
|
|
wp = backup;
|
|
*wp = 'z';
|
|
while (*wp > 'a'
|
|
&& mch_stat((char *)backup, &st_new) >= 0)
|
|
--*wp;
|
|
// They all exist??? Must be something wrong.
|
|
if (*wp == 'a')
|
|
VIM_CLEAR(backup);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
vim_free(rootname);
|
|
|
|
// Try to create the backup file
|
|
if (backup != NULL)
|
|
{
|
|
// remove old backup, if present
|
|
mch_remove(backup);
|
|
// Open with O_EXCL to avoid the file being created while
|
|
// we were sleeping (symlink hacker attack?). Reset umask
|
|
// if possible to avoid mch_setperm() below.
|
|
#ifdef UNIX
|
|
umask_save = umask(0);
|
|
#endif
|
|
bfd = mch_open((char *)backup,
|
|
O_WRONLY|O_CREAT|O_EXTRA|O_EXCL|O_NOFOLLOW,
|
|
perm & 0777);
|
|
#ifdef UNIX
|
|
(void)umask(umask_save);
|
|
#endif
|
|
if (bfd < 0)
|
|
VIM_CLEAR(backup);
|
|
else
|
|
{
|
|
// Set file protection same as original file, but
|
|
// strip s-bit. Only needed if umask() wasn't used
|
|
// above.
|
|
#ifndef UNIX
|
|
(void)mch_setperm(backup, perm & 0777);
|
|
#else
|
|
// Try to set the group of the backup same as the
|
|
// original file. If this fails, set the protection
|
|
// bits for the group same as the protection bits for
|
|
// others.
|
|
if (st_new.st_gid != st_old.st_gid
|
|
# ifdef HAVE_FCHOWN // sequent-ptx lacks fchown()
|
|
&& fchown(bfd, (uid_t)-1, st_old.st_gid) != 0
|
|
# endif
|
|
)
|
|
mch_setperm(backup,
|
|
(perm & 0707) | ((perm & 07) << 3));
|
|
# if defined(HAVE_SELINUX) || defined(HAVE_SMACK)
|
|
mch_copy_sec(fname, backup);
|
|
# endif
|
|
# ifdef FEAT_XATTR
|
|
mch_copy_xattr(fname, backup);
|
|
# endif
|
|
#endif
|
|
|
|
// copy the file.
|
|
write_info.bw_fd = bfd;
|
|
write_info.bw_buf = copybuf;
|
|
write_info.bw_flags = FIO_NOCONVERT;
|
|
while ((write_info.bw_len = read_eintr(fd, copybuf,
|
|
WRITEBUFSIZE)) > 0)
|
|
{
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
{
|
|
errmsg = (char_u *)_(e_cant_write_to_backup_file_add_bang_to_override);
|
|
break;
|
|
}
|
|
ui_breakcheck();
|
|
if (got_int)
|
|
{
|
|
errmsg = (char_u *)_(e_interrupted);
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (close(bfd) < 0 && errmsg == NULL)
|
|
errmsg = (char_u *)_(e_close_error_for_backup_file_add_bang_to_write_anyway);
|
|
if (write_info.bw_len < 0)
|
|
errmsg = (char_u *)_(e_cant_read_file_for_backup_add_bang_to_write_anyway);
|
|
#ifdef UNIX
|
|
set_file_time(backup, st_old.st_atime, st_old.st_mtime);
|
|
#endif
|
|
#ifdef HAVE_ACL
|
|
mch_set_acl(backup, acl);
|
|
#endif
|
|
#if defined(HAVE_SELINUX) || defined(HAVE_SMACK)
|
|
mch_copy_sec(fname, backup);
|
|
#endif
|
|
#ifdef FEAT_XATTR
|
|
mch_copy_xattr(fname, backup);
|
|
#endif
|
|
#ifdef MSWIN
|
|
(void)mch_copy_file_attribute(fname, backup);
|
|
#endif
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
nobackup:
|
|
close(fd); // ignore errors for closing read file
|
|
vim_free(copybuf);
|
|
|
|
if (backup == NULL && errmsg == NULL)
|
|
errmsg = (char_u *)_(e_cannot_create_backup_file_add_bang_to_write_anyway);
|
|
// ignore errors when forceit is TRUE
|
|
if ((some_error || errmsg != NULL) && !forceit)
|
|
{
|
|
retval = FAIL;
|
|
goto fail;
|
|
}
|
|
errmsg = NULL;
|
|
}
|
|
else
|
|
{
|
|
char_u *dirp;
|
|
char_u *p;
|
|
char_u *rootname;
|
|
|
|
// Make a backup by renaming the original file.
|
|
|
|
// If 'cpoptions' includes the "W" flag, we don't want to
|
|
// overwrite a read-only file. But rename may be possible
|
|
// anyway, thus we need an extra check here.
|
|
if (file_readonly && vim_strchr(p_cpo, CPO_FWRITE) != NULL)
|
|
{
|
|
errnum = (char_u *)"E504: ";
|
|
errmsg = (char_u *)_(e_is_read_only_cannot_override_W_in_cpoptions);
|
|
goto fail;
|
|
}
|
|
|
|
// Form the backup file name - change path/fo.o.h to
|
|
// path/fo.o.h.bak Try all directories in 'backupdir', first one
|
|
// that works is used.
|
|
dirp = p_bdir;
|
|
while (*dirp)
|
|
{
|
|
// Isolate one directory name and make the backup file name.
|
|
(void)copy_option_part(&dirp, IObuff, IOSIZE, ",");
|
|
|
|
#if defined(UNIX) || defined(MSWIN)
|
|
p = IObuff + STRLEN(IObuff);
|
|
if (after_pathsep(IObuff, p) && p[-1] == p[-2])
|
|
// path ends with '//', use full path
|
|
if ((p = make_percent_swname(IObuff, p, fname)) != NULL)
|
|
{
|
|
backup = modname(p, backup_ext, FALSE);
|
|
vim_free(p);
|
|
}
|
|
#endif
|
|
if (backup == NULL)
|
|
{
|
|
rootname = get_file_in_dir(fname, IObuff);
|
|
if (rootname == NULL)
|
|
backup = NULL;
|
|
else
|
|
{
|
|
backup = buf_modname(
|
|
(buf->b_p_sn || buf->b_shortname),
|
|
rootname, backup_ext, FALSE);
|
|
vim_free(rootname);
|
|
}
|
|
}
|
|
|
|
if (backup != NULL)
|
|
{
|
|
// If we are not going to keep the backup file, don't
|
|
// delete an existing one, try to use another name.
|
|
// Change one character, just before the extension.
|
|
if (!p_bk && mch_getperm(backup) >= 0)
|
|
{
|
|
p = backup + STRLEN(backup) - 1 - STRLEN(backup_ext);
|
|
if (p < backup) // empty file name ???
|
|
p = backup;
|
|
*p = 'z';
|
|
while (*p > 'a' && mch_getperm(backup) >= 0)
|
|
--*p;
|
|
// They all exist??? Must be something wrong!
|
|
if (*p == 'a')
|
|
VIM_CLEAR(backup);
|
|
}
|
|
}
|
|
if (backup != NULL)
|
|
{
|
|
// Delete any existing backup and move the current version
|
|
// to the backup. For safety, we don't remove the backup
|
|
// until the write has finished successfully. And if the
|
|
// 'backup' option is set, leave it around.
|
|
|
|
// If the renaming of the original file to the backup file
|
|
// works, quit here.
|
|
if (vim_rename(fname, backup) == 0)
|
|
break;
|
|
|
|
VIM_CLEAR(backup); // don't do the rename below
|
|
}
|
|
}
|
|
if (backup == NULL && !forceit)
|
|
{
|
|
errmsg = (char_u *)_(e_cant_make_backup_file_add_bang_to_write_anyway);
|
|
goto fail;
|
|
}
|
|
}
|
|
}
|
|
|
|
#if defined(UNIX)
|
|
// When using ":w!" and the file was read-only: make it writable
|
|
if (forceit && perm >= 0 && !(perm & 0200) && st_old.st_uid == getuid()
|
|
&& vim_strchr(p_cpo, CPO_FWRITE) == NULL)
|
|
{
|
|
perm |= 0200;
|
|
(void)mch_setperm(fname, perm);
|
|
made_writable = TRUE;
|
|
}
|
|
#endif
|
|
|
|
// When using ":w!" and writing to the current file, 'readonly' makes no
|
|
// sense, reset it, unless 'Z' appears in 'cpoptions'.
|
|
if (forceit && overwriting && vim_strchr(p_cpo, CPO_KEEPRO) == NULL)
|
|
{
|
|
buf->b_p_ro = FALSE;
|
|
need_maketitle = TRUE; // set window title later
|
|
status_redraw_all(); // redraw status lines later
|
|
}
|
|
|
|
if (end > buf->b_ml.ml_line_count)
|
|
end = buf->b_ml.ml_line_count;
|
|
if (buf->b_ml.ml_flags & ML_EMPTY)
|
|
start = end + 1;
|
|
|
|
// If the original file is being overwritten, there is a small chance that
|
|
// we crash in the middle of writing. Therefore the file is preserved now.
|
|
// This makes all block numbers positive so that recovery does not need
|
|
// the original file.
|
|
// Don't do this if there is a backup file and we are exiting.
|
|
if (reset_changed && !newfile && overwriting
|
|
&& !(exiting && backup != NULL))
|
|
{
|
|
ml_preserve(buf, FALSE);
|
|
if (got_int)
|
|
{
|
|
errmsg = (char_u *)_(e_interrupted);
|
|
goto restore_backup;
|
|
}
|
|
}
|
|
|
|
#ifdef VMS
|
|
vms_remove_version(fname); // remove version
|
|
#endif
|
|
// Default: write the file directly. May write to a temp file for
|
|
// multi-byte conversion.
|
|
wfname = fname;
|
|
|
|
// Check for forced 'fileencoding' from "++opt=val" argument.
|
|
if (eap != NULL && eap->force_enc != 0)
|
|
{
|
|
fenc = eap->cmd + eap->force_enc;
|
|
fenc = enc_canonize(fenc);
|
|
fenc_tofree = fenc;
|
|
}
|
|
else
|
|
fenc = buf->b_p_fenc;
|
|
|
|
// Check if the file needs to be converted.
|
|
converted = need_conversion(fenc);
|
|
|
|
// Check if UTF-8 to UCS-2/4 or Latin1 conversion needs to be done. Or
|
|
// Latin1 to Unicode conversion. This is handled in buf_write_bytes().
|
|
// Prepare the flags for it and allocate bw_conv_buf when needed.
|
|
if (converted && (enc_utf8 || STRCMP(p_enc, "latin1") == 0))
|
|
{
|
|
wb_flags = get_fio_flags(fenc);
|
|
if (wb_flags & (FIO_UCS2 | FIO_UCS4 | FIO_UTF16 | FIO_UTF8))
|
|
{
|
|
// Need to allocate a buffer to translate into.
|
|
if (wb_flags & (FIO_UCS2 | FIO_UTF16 | FIO_UTF8))
|
|
write_info.bw_conv_buflen = bufsize * 2;
|
|
else // FIO_UCS4
|
|
write_info.bw_conv_buflen = bufsize * 4;
|
|
write_info.bw_conv_buf = alloc(write_info.bw_conv_buflen);
|
|
if (write_info.bw_conv_buf == NULL)
|
|
end = 0;
|
|
}
|
|
}
|
|
|
|
#ifdef MSWIN
|
|
if (converted && wb_flags == 0 && (wb_flags = get_win_fio_flags(fenc)) != 0)
|
|
{
|
|
// Convert UTF-8 -> UCS-2 and UCS-2 -> DBCS. Worst-case * 4:
|
|
write_info.bw_conv_buflen = bufsize * 4;
|
|
write_info.bw_conv_buf = alloc(write_info.bw_conv_buflen);
|
|
if (write_info.bw_conv_buf == NULL)
|
|
end = 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef MACOS_CONVERT
|
|
if (converted && wb_flags == 0 && (wb_flags = get_mac_fio_flags(fenc)) != 0)
|
|
{
|
|
write_info.bw_conv_buflen = bufsize * 3;
|
|
write_info.bw_conv_buf = alloc(write_info.bw_conv_buflen);
|
|
if (write_info.bw_conv_buf == NULL)
|
|
end = 0;
|
|
}
|
|
#endif
|
|
|
|
#if defined(FEAT_EVAL) || defined(USE_ICONV)
|
|
if (converted && wb_flags == 0)
|
|
{
|
|
# ifdef USE_ICONV
|
|
// Use iconv() conversion when conversion is needed and it's not done
|
|
// internally.
|
|
write_info.bw_iconv_fd = (iconv_t)my_iconv_open(fenc,
|
|
enc_utf8 ? (char_u *)"utf-8" : p_enc);
|
|
if (write_info.bw_iconv_fd != (iconv_t)-1)
|
|
{
|
|
// We're going to use iconv(), allocate a buffer to convert in.
|
|
write_info.bw_conv_buflen = bufsize * ICONV_MULT;
|
|
write_info.bw_conv_buf = alloc(write_info.bw_conv_buflen);
|
|
if (write_info.bw_conv_buf == NULL)
|
|
end = 0;
|
|
write_info.bw_first = TRUE;
|
|
}
|
|
# ifdef FEAT_EVAL
|
|
else
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef FEAT_EVAL
|
|
// When the file needs to be converted with 'charconvert' after
|
|
// writing, write to a temp file instead and let the conversion
|
|
// overwrite the original file.
|
|
if (*p_ccv != NUL)
|
|
{
|
|
wfname = vim_tempname('w', FALSE);
|
|
if (wfname == NULL) // Can't write without a tempfile!
|
|
{
|
|
errmsg = (char_u *)_(e_cant_find_temp_file_for_writing);
|
|
goto restore_backup;
|
|
}
|
|
}
|
|
# endif
|
|
}
|
|
#endif
|
|
if (converted && wb_flags == 0
|
|
#ifdef USE_ICONV
|
|
&& write_info.bw_iconv_fd == (iconv_t)-1
|
|
# endif
|
|
# ifdef FEAT_EVAL
|
|
&& wfname == fname
|
|
# endif
|
|
)
|
|
{
|
|
if (!forceit)
|
|
{
|
|
errmsg = (char_u *)_(e_cannot_convert_add_bang_to_write_without_conversion);
|
|
goto restore_backup;
|
|
}
|
|
notconverted = TRUE;
|
|
}
|
|
|
|
// If conversion is taking place, we may first pretend to write and check
|
|
// for conversion errors. Then loop again to write for real.
|
|
// When not doing conversion this writes for real right away.
|
|
for (checking_conversion = TRUE; ; checking_conversion = FALSE)
|
|
{
|
|
// There is no need to check conversion when:
|
|
// - there is no conversion
|
|
// - we make a backup file, that can be restored in case of conversion
|
|
// failure.
|
|
if (!converted || dobackup)
|
|
checking_conversion = FALSE;
|
|
|
|
if (checking_conversion)
|
|
{
|
|
// Make sure we don't write anything.
|
|
fd = -1;
|
|
write_info.bw_fd = fd;
|
|
}
|
|
else
|
|
{
|
|
#ifdef HAVE_FTRUNCATE
|
|
# define TRUNC_ON_OPEN 0
|
|
#else
|
|
# define TRUNC_ON_OPEN O_TRUNC
|
|
#endif
|
|
// Open the file "wfname" for writing.
|
|
// We may try to open the file twice: If we can't write to the file
|
|
// and forceit is TRUE we delete the existing file and try to
|
|
// create a new one. If this still fails we may have lost the
|
|
// original file! (this may happen when the user reached his
|
|
// quotum for number of files).
|
|
// Appending will fail if the file does not exist and forceit is
|
|
// FALSE.
|
|
while ((fd = mch_open((char *)wfname, O_WRONLY | O_EXTRA | (append
|
|
? (forceit ? (O_APPEND | O_CREAT) : O_APPEND)
|
|
: (O_CREAT | TRUNC_ON_OPEN))
|
|
, perm < 0 ? 0666 : (perm & 0777))) < 0)
|
|
{
|
|
// A forced write will try to create a new file if the old one
|
|
// is still readonly. This may also happen when the directory
|
|
// is read-only. In that case the mch_remove() will fail.
|
|
if (errmsg == NULL)
|
|
{
|
|
#ifdef UNIX
|
|
stat_T st;
|
|
|
|
// Don't delete the file when it's a hard or symbolic link.
|
|
if ((!newfile && st_old.st_nlink > 1)
|
|
|| (mch_lstat((char *)fname, &st) == 0
|
|
&& (st.st_dev != st_old.st_dev
|
|
|| st.st_ino != st_old.st_ino)))
|
|
errmsg =
|
|
(char_u *)_(e_cant_open_linked_file_for_writing);
|
|
else
|
|
#endif
|
|
{
|
|
errmsg = (char_u *)_(e_cant_open_file_for_writing);
|
|
if (forceit && vim_strchr(p_cpo, CPO_FWRITE) == NULL
|
|
&& perm >= 0)
|
|
{
|
|
#ifdef UNIX
|
|
// we write to the file, thus it should be marked
|
|
// writable after all
|
|
if (!(perm & 0200))
|
|
made_writable = TRUE;
|
|
perm |= 0200;
|
|
if (st_old.st_uid != getuid()
|
|
|| st_old.st_gid != getgid())
|
|
perm &= 0777;
|
|
#endif
|
|
if (!append) // don't remove when appending
|
|
mch_remove(wfname);
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
|
|
restore_backup:
|
|
{
|
|
stat_T st;
|
|
|
|
// If we failed to open the file, we don't need a backup.
|
|
// Throw it away. If we moved or removed the original file
|
|
// try to put the backup in its place.
|
|
if (backup != NULL && wfname == fname)
|
|
{
|
|
if (backup_copy)
|
|
{
|
|
// There is a small chance that we removed the
|
|
// original, try to move the copy in its place.
|
|
// This may not work if the vim_rename() fails.
|
|
// In that case we leave the copy around.
|
|
|
|
// If file does not exist, put the copy in its
|
|
// place
|
|
if (mch_stat((char *)fname, &st) < 0)
|
|
vim_rename(backup, fname);
|
|
// if original file does exist throw away the copy
|
|
if (mch_stat((char *)fname, &st) >= 0)
|
|
mch_remove(backup);
|
|
}
|
|
else
|
|
{
|
|
// try to put the original file back
|
|
vim_rename(backup, fname);
|
|
}
|
|
}
|
|
|
|
// if original file no longer exists give an extra warning
|
|
if (!newfile && mch_stat((char *)fname, &st) < 0)
|
|
end = 0;
|
|
}
|
|
|
|
if (wfname != fname)
|
|
vim_free(wfname);
|
|
goto fail;
|
|
}
|
|
write_info.bw_fd = fd;
|
|
|
|
#if defined(UNIX)
|
|
{
|
|
stat_T st;
|
|
|
|
// Double check we are writing the intended file before making
|
|
// any changes.
|
|
if (overwriting
|
|
&& (!dobackup || backup_copy)
|
|
&& fname == wfname
|
|
&& perm >= 0
|
|
&& mch_fstat(fd, &st) == 0
|
|
&& st.st_ino != st_old.st_ino)
|
|
{
|
|
close(fd);
|
|
errmsg = (char_u *)_(e_file_changed_while_writing);
|
|
goto fail;
|
|
}
|
|
}
|
|
#endif
|
|
#ifdef HAVE_FTRUNCATE
|
|
if (!append)
|
|
vim_ignored = ftruncate(fd, (off_t)0);
|
|
#endif
|
|
|
|
#if defined(MSWIN)
|
|
if (backup != NULL && overwriting && !append)
|
|
(void)mch_copy_file_attribute(backup, wfname);
|
|
|
|
if (!overwriting && !append)
|
|
{
|
|
if (buf->b_ffname != NULL)
|
|
(void)mch_copy_file_attribute(buf->b_ffname, wfname);
|
|
// Should copy resource fork
|
|
}
|
|
#endif
|
|
|
|
#ifdef FEAT_CRYPT
|
|
if (*buf->b_p_key != NUL && !filtering)
|
|
{
|
|
char_u *header;
|
|
int header_len;
|
|
|
|
buf->b_cryptstate = crypt_create_for_writing(
|
|
crypt_get_method_nr(buf),
|
|
buf->b_p_key, &header, &header_len);
|
|
if (buf->b_cryptstate == NULL || header == NULL)
|
|
end = 0;
|
|
else
|
|
{
|
|
// Write magic number, so that Vim knows how this file is
|
|
// encrypted when reading it back.
|
|
write_info.bw_buf = header;
|
|
write_info.bw_len = header_len;
|
|
write_info.bw_flags = FIO_NOCONVERT;
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
end = 0;
|
|
wb_flags |= FIO_ENCRYPTED;
|
|
vim_free(header);
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
errmsg = NULL;
|
|
|
|
write_info.bw_buf = buffer;
|
|
nchars = 0;
|
|
|
|
// use "++bin", "++nobin" or 'binary'
|
|
if (eap != NULL && eap->force_bin != 0)
|
|
write_bin = (eap->force_bin == FORCE_BIN);
|
|
else
|
|
write_bin = buf->b_p_bin;
|
|
|
|
// The BOM is written just after the encryption magic number.
|
|
// Skip it when appending and the file already existed, the BOM only
|
|
// makes sense at the start of the file.
|
|
if (buf->b_p_bomb && !write_bin && (!append || perm < 0))
|
|
{
|
|
write_info.bw_len = make_bom(buffer, fenc);
|
|
if (write_info.bw_len > 0)
|
|
{
|
|
// don't convert, do encryption
|
|
write_info.bw_flags = FIO_NOCONVERT | wb_flags;
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
end = 0;
|
|
else
|
|
nchars += write_info.bw_len;
|
|
}
|
|
}
|
|
write_info.bw_start_lnum = start;
|
|
|
|
#ifdef FEAT_PERSISTENT_UNDO
|
|
write_undo_file = (buf->b_p_udf
|
|
&& overwriting
|
|
&& !append
|
|
&& !filtering
|
|
# ifdef CRYPT_NOT_INPLACE
|
|
// writing undo file requires
|
|
// crypt_encode_inplace()
|
|
&& (buf->b_cryptstate == NULL
|
|
|| crypt_works_inplace(buf->b_cryptstate))
|
|
# endif
|
|
&& reset_changed
|
|
&& !checking_conversion);
|
|
# ifdef CRYPT_NOT_INPLACE
|
|
// remove undo file if encrypting it is not possible
|
|
if (buf->b_p_udf
|
|
&& overwriting
|
|
&& !append
|
|
&& !filtering
|
|
&& !checking_conversion
|
|
&& buf->b_cryptstate != NULL
|
|
&& !crypt_works_inplace(buf->b_cryptstate))
|
|
u_undofile_reset_and_delete(buf);
|
|
# endif
|
|
if (write_undo_file)
|
|
// Prepare for computing the hash value of the text.
|
|
sha256_start(&sha_ctx);
|
|
#endif
|
|
|
|
write_info.bw_len = bufsize;
|
|
write_info.bw_flags = wb_flags;
|
|
fileformat = get_fileformat_force(buf, eap);
|
|
s = buffer;
|
|
len = 0;
|
|
for (lnum = start; lnum <= end; ++lnum)
|
|
{
|
|
// The next while loop is done once for each character written.
|
|
// Keep it fast!
|
|
ptr = ml_get_buf(buf, lnum, FALSE) - 1;
|
|
#ifdef FEAT_PERSISTENT_UNDO
|
|
if (write_undo_file)
|
|
sha256_update(&sha_ctx, ptr + 1,
|
|
(UINT32_T)(STRLEN(ptr + 1) + 1));
|
|
#endif
|
|
while ((c = *++ptr) != NUL)
|
|
{
|
|
if (c == NL)
|
|
*s = NUL; // replace newlines with NULs
|
|
else if (c == CAR && fileformat == EOL_MAC)
|
|
*s = NL; // Mac: replace CRs with NLs
|
|
else
|
|
*s = c;
|
|
++s;
|
|
if (++len != bufsize)
|
|
continue;
|
|
#ifdef FEAT_CRYPT
|
|
if (write_info.bw_fd > 0 && lnum == end
|
|
&& (write_info.bw_flags & FIO_ENCRYPTED)
|
|
&& *buf->b_p_key != NUL && !filtering
|
|
&& *ptr == NUL)
|
|
write_info.bw_finish = TRUE;
|
|
#endif
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
{
|
|
end = 0; // write error: break loop
|
|
break;
|
|
}
|
|
nchars += bufsize;
|
|
s = buffer;
|
|
len = 0;
|
|
write_info.bw_start_lnum = lnum;
|
|
}
|
|
// write failed or last line has no EOL: stop here
|
|
if (end == 0
|
|
|| (lnum == end
|
|
&& (write_bin || !buf->b_p_fixeol)
|
|
&& ((write_bin && lnum == buf->b_no_eol_lnum)
|
|
|| (lnum == buf->b_ml.ml_line_count
|
|
&& !buf->b_p_eol))))
|
|
{
|
|
++lnum; // written the line, count it
|
|
no_eol = TRUE;
|
|
break;
|
|
}
|
|
if (fileformat == EOL_UNIX)
|
|
*s++ = NL;
|
|
else
|
|
{
|
|
*s++ = CAR; // EOL_MAC or EOL_DOS: write CR
|
|
if (fileformat == EOL_DOS) // write CR-NL
|
|
{
|
|
if (++len == bufsize)
|
|
{
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
{
|
|
end = 0; // write error: break loop
|
|
break;
|
|
}
|
|
nchars += bufsize;
|
|
s = buffer;
|
|
len = 0;
|
|
}
|
|
*s++ = NL;
|
|
}
|
|
}
|
|
if (++len == bufsize && end)
|
|
{
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
{
|
|
end = 0; // write error: break loop
|
|
break;
|
|
}
|
|
nchars += bufsize;
|
|
s = buffer;
|
|
len = 0;
|
|
|
|
ui_breakcheck();
|
|
if (got_int)
|
|
{
|
|
end = 0; // Interrupted, break loop
|
|
break;
|
|
}
|
|
}
|
|
#ifdef VMS
|
|
// On VMS there is a problem: newlines get added when writing
|
|
// blocks at a time. Fix it by writing a line at a time.
|
|
// This is much slower!
|
|
// Explanation: VAX/DECC RTL insists that records in some RMS
|
|
// structures end with a newline (carriage return) character, and
|
|
// if they don't it adds one.
|
|
// With other RMS structures it works perfect without this fix.
|
|
# ifndef MIN
|
|
// Older DECC compiler for VAX doesn't define MIN()
|
|
# define MIN(a, b) ((a) < (b) ? (a) : (b))
|
|
# endif
|
|
if (buf->b_fab_rfm == FAB$C_VFC
|
|
|| ((buf->b_fab_rat & (FAB$M_FTN | FAB$M_CR)) != 0))
|
|
{
|
|
int b2write;
|
|
|
|
buf->b_fab_mrs = (buf->b_fab_mrs == 0
|
|
? MIN(4096, bufsize)
|
|
: MIN(buf->b_fab_mrs, bufsize));
|
|
|
|
b2write = len;
|
|
while (b2write > 0)
|
|
{
|
|
write_info.bw_len = MIN(b2write, buf->b_fab_mrs);
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
{
|
|
end = 0;
|
|
break;
|
|
}
|
|
b2write -= MIN(b2write, buf->b_fab_mrs);
|
|
}
|
|
write_info.bw_len = bufsize;
|
|
nchars += len;
|
|
s = buffer;
|
|
len = 0;
|
|
}
|
|
#endif
|
|
}
|
|
if (len > 0 && end > 0)
|
|
{
|
|
write_info.bw_len = len;
|
|
#ifdef FEAT_CRYPT
|
|
if (write_info.bw_fd > 0 && lnum >= end
|
|
&& (write_info.bw_flags & FIO_ENCRYPTED)
|
|
&& *buf->b_p_key != NUL && !filtering)
|
|
write_info.bw_finish = TRUE;
|
|
#endif
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
end = 0; // write error
|
|
nchars += len;
|
|
}
|
|
|
|
if (!buf->b_p_fixeol && buf->b_p_eof)
|
|
{
|
|
// write trailing CTRL-Z
|
|
(void)write_eintr(write_info.bw_fd, "\x1a", 1);
|
|
nchars++;
|
|
}
|
|
|
|
// Stop when writing done or an error was encountered.
|
|
if (!checking_conversion || end == 0)
|
|
break;
|
|
|
|
// If no error happened until now, writing should be ok, so loop to
|
|
// really write the buffer.
|
|
}
|
|
|
|
// If we started writing, finish writing. Also when an error was
|
|
// encountered.
|
|
if (!checking_conversion)
|
|
{
|
|
#if defined(UNIX) && defined(HAVE_FSYNC)
|
|
// On many journaling file systems there is a bug that causes both the
|
|
// original and the backup file to be lost when halting the system
|
|
// right after writing the file. That's because only the meta-data is
|
|
// journalled. Syncing the file slows down the system, but assures it
|
|
// has been written to disk and we don't lose it.
|
|
// For a device do try the fsync() but don't complain if it does not
|
|
// work (could be a pipe).
|
|
// If the 'fsync' option is FALSE, don't fsync(). Useful for laptops.
|
|
if (p_fs && vim_fsync(fd) != 0 && !device)
|
|
{
|
|
errmsg = (char_u *)_(e_fsync_failed);
|
|
end = 0;
|
|
}
|
|
#endif
|
|
|
|
#if defined(HAVE_SELINUX) || defined(HAVE_SMACK) || defined(FEAT_XATTR)
|
|
// Probably need to set the security context.
|
|
if (!backup_copy)
|
|
{
|
|
#if defined(HAVE_SELINUX) || defined(HAVE_SMACK)
|
|
mch_copy_sec(backup, wfname);
|
|
#endif
|
|
#ifdef FEAT_XATTR
|
|
mch_copy_xattr(backup, wfname);
|
|
#endif
|
|
}
|
|
#endif
|
|
|
|
#ifdef UNIX
|
|
// When creating a new file, set its owner/group to that of the
|
|
// original file. Get the new device and inode number.
|
|
if (backup != NULL && !backup_copy)
|
|
{
|
|
# ifdef HAVE_FCHOWN
|
|
stat_T st;
|
|
|
|
// Don't change the owner when it's already OK, some systems remove
|
|
// permission or ACL stuff.
|
|
if (mch_stat((char *)wfname, &st) < 0
|
|
|| st.st_uid != st_old.st_uid
|
|
|| st.st_gid != st_old.st_gid)
|
|
{
|
|
// changing owner might not be possible
|
|
vim_ignored = fchown(fd, st_old.st_uid, -1);
|
|
// if changing group fails clear the group permissions
|
|
if (fchown(fd, -1, st_old.st_gid) == -1 && perm > 0)
|
|
perm &= ~070;
|
|
}
|
|
# endif
|
|
buf_setino(buf);
|
|
}
|
|
else if (!buf->b_dev_valid)
|
|
// Set the inode when creating a new file.
|
|
buf_setino(buf);
|
|
#endif
|
|
|
|
#ifdef UNIX
|
|
if (made_writable)
|
|
perm &= ~0200; // reset 'w' bit for security reasons
|
|
#endif
|
|
#ifdef HAVE_FCHMOD
|
|
// set permission of new file same as old file
|
|
if (perm >= 0)
|
|
(void)mch_fsetperm(fd, perm);
|
|
#endif
|
|
if (close(fd) != 0)
|
|
{
|
|
errmsg = (char_u *)_(e_close_failed);
|
|
end = 0;
|
|
}
|
|
|
|
#ifndef HAVE_FCHMOD
|
|
// set permission of new file same as old file
|
|
if (perm >= 0)
|
|
(void)mch_setperm(wfname, perm);
|
|
#endif
|
|
#ifdef HAVE_ACL
|
|
// Probably need to set the ACL before changing the user (can't set the
|
|
// ACL on a file the user doesn't own).
|
|
// On Solaris, with ZFS and the aclmode property set to "discard" (the
|
|
// default), chmod() discards all part of a file's ACL that don't
|
|
// represent the mode of the file. It's non-trivial for us to discover
|
|
// whether we're in that situation, so we simply always re-set the ACL.
|
|
# ifndef HAVE_SOLARIS_ZFS_ACL
|
|
if (!backup_copy)
|
|
# endif
|
|
mch_set_acl(wfname, acl);
|
|
#endif
|
|
#ifdef FEAT_CRYPT
|
|
if (buf->b_cryptstate != NULL)
|
|
{
|
|
crypt_free_state(buf->b_cryptstate);
|
|
buf->b_cryptstate = NULL;
|
|
}
|
|
#endif
|
|
|
|
#if defined(FEAT_EVAL)
|
|
if (wfname != fname)
|
|
{
|
|
// The file was written to a temp file, now it needs to be
|
|
// converted with 'charconvert' to (overwrite) the output file.
|
|
if (end != 0)
|
|
{
|
|
if (eval_charconvert(enc_utf8 ? (char_u *)"utf-8" : p_enc,
|
|
fenc, wfname, fname) == FAIL)
|
|
{
|
|
write_info.bw_conv_error = TRUE;
|
|
end = 0;
|
|
}
|
|
}
|
|
mch_remove(wfname);
|
|
vim_free(wfname);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if (end == 0)
|
|
{
|
|
// Error encountered.
|
|
if (errmsg == NULL)
|
|
{
|
|
if (write_info.bw_conv_error)
|
|
{
|
|
if (write_info.bw_conv_error_lnum == 0)
|
|
errmsg = (char_u *)_(e_write_error_conversion_failed_make_fenc_empty_to_override);
|
|
else
|
|
{
|
|
errmsg_allocated = TRUE;
|
|
errmsg = alloc(300);
|
|
if (errmsg == NULL)
|
|
goto fail;
|
|
vim_snprintf((char *)errmsg, 300, _(e_write_error_conversion_failed_in_line_nr_make_fenc_empty_to_override),
|
|
(long)write_info.bw_conv_error_lnum);
|
|
}
|
|
}
|
|
else if (got_int)
|
|
errmsg = (char_u *)_(e_interrupted);
|
|
else
|
|
errmsg = (char_u *)_(e_write_error_file_system_full);
|
|
}
|
|
|
|
// If we have a backup file, try to put it in place of the new file,
|
|
// because the new file is probably corrupt. This avoids losing the
|
|
// original file when trying to make a backup when writing the file a
|
|
// second time.
|
|
// When "backup_copy" is set we need to copy the backup over the new
|
|
// file. Otherwise rename the backup file.
|
|
// If this is OK, don't give the extra warning message.
|
|
if (backup != NULL)
|
|
{
|
|
if (backup_copy)
|
|
{
|
|
// This may take a while, if we were interrupted let the user
|
|
// know we got the message.
|
|
if (got_int)
|
|
{
|
|
msg(_(e_interrupted));
|
|
out_flush();
|
|
}
|
|
if ((fd = mch_open((char *)backup, O_RDONLY | O_EXTRA, 0)) >= 0)
|
|
{
|
|
if ((write_info.bw_fd = mch_open((char *)fname,
|
|
O_WRONLY | O_CREAT | O_TRUNC | O_EXTRA,
|
|
perm & 0777)) >= 0)
|
|
{
|
|
// copy the file.
|
|
write_info.bw_buf = smallbuf;
|
|
write_info.bw_flags = FIO_NOCONVERT;
|
|
while ((write_info.bw_len = read_eintr(fd, smallbuf,
|
|
SMALLBUFSIZE)) > 0)
|
|
if (buf_write_bytes(&write_info) == FAIL)
|
|
break;
|
|
|
|
if (close(write_info.bw_fd) >= 0
|
|
&& write_info.bw_len == 0)
|
|
end = 1; // success
|
|
}
|
|
close(fd); // ignore errors for closing read file
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (vim_rename(backup, fname) == 0)
|
|
end = 1;
|
|
}
|
|
}
|
|
goto fail;
|
|
}
|
|
|
|
lnum -= start; // compute number of written lines
|
|
--no_wait_return; // may wait for return now
|
|
|
|
#if !(defined(UNIX) || defined(VMS))
|
|
fname = sfname; // use shortname now, for the messages
|
|
#endif
|
|
if (!filtering)
|
|
{
|
|
msg_add_fname(buf, fname); // put fname in IObuff with quotes
|
|
c = FALSE;
|
|
if (write_info.bw_conv_error)
|
|
{
|
|
STRCAT(IObuff, _(" CONVERSION ERROR"));
|
|
c = TRUE;
|
|
if (write_info.bw_conv_error_lnum != 0)
|
|
vim_snprintf_add((char *)IObuff, IOSIZE, _(" in line %ld;"),
|
|
(long)write_info.bw_conv_error_lnum);
|
|
}
|
|
else if (notconverted)
|
|
{
|
|
STRCAT(IObuff, _("[NOT converted]"));
|
|
c = TRUE;
|
|
}
|
|
else if (converted)
|
|
{
|
|
STRCAT(IObuff, _("[converted]"));
|
|
c = TRUE;
|
|
}
|
|
if (device)
|
|
{
|
|
STRCAT(IObuff, _("[Device]"));
|
|
c = TRUE;
|
|
}
|
|
else if (newfile)
|
|
{
|
|
STRCAT(IObuff, new_file_message());
|
|
c = TRUE;
|
|
}
|
|
if (no_eol)
|
|
{
|
|
msg_add_eol();
|
|
c = TRUE;
|
|
}
|
|
// may add [unix/dos/mac]
|
|
if (msg_add_fileformat(fileformat))
|
|
c = TRUE;
|
|
#ifdef FEAT_CRYPT
|
|
if (wb_flags & FIO_ENCRYPTED)
|
|
{
|
|
crypt_append_msg(buf);
|
|
c = TRUE;
|
|
}
|
|
#endif
|
|
msg_add_lines(c, (long)lnum, nchars); // add line/char count
|
|
if (!shortmess(SHM_WRITE))
|
|
{
|
|
if (append)
|
|
STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [a]") : _(" appended"));
|
|
else
|
|
STRCAT(IObuff, shortmess(SHM_WRI) ? _(" [w]") : _(" written"));
|
|
}
|
|
|
|
set_keep_msg((char_u *)msg_trunc_attr((char *)IObuff, FALSE, 0), 0);
|
|
}
|
|
|
|
// When written everything correctly: reset 'modified'. Unless not
|
|
// writing to the original file and '+' is not in 'cpoptions'.
|
|
if (reset_changed && whole && !append
|
|
&& !write_info.bw_conv_error
|
|
&& (overwriting || vim_strchr(p_cpo, CPO_PLUS) != NULL))
|
|
{
|
|
unchanged(buf, TRUE, FALSE);
|
|
// b:changedtick may be incremented in unchanged() but that should not
|
|
// trigger a TextChanged event.
|
|
if (buf->b_last_changedtick + 1 == CHANGEDTICK(buf))
|
|
buf->b_last_changedtick = CHANGEDTICK(buf);
|
|
u_unchanged(buf);
|
|
u_update_save_nr(buf);
|
|
}
|
|
|
|
// If written to the current file, update the timestamp of the swap file
|
|
// and reset the BF_WRITE_MASK flags. Also sets buf->b_mtime.
|
|
if (overwriting)
|
|
{
|
|
ml_timestamp(buf);
|
|
if (append)
|
|
buf->b_flags &= ~BF_NEW;
|
|
else
|
|
buf->b_flags &= ~BF_WRITE_MASK;
|
|
}
|
|
|
|
// If we kept a backup until now, and we are in patch mode, then we make
|
|
// the backup file our 'original' file.
|
|
if (*p_pm && dobackup)
|
|
{
|
|
char *org = (char *)buf_modname((buf->b_p_sn || buf->b_shortname),
|
|
fname, p_pm, FALSE);
|
|
|
|
if (backup != NULL)
|
|
{
|
|
stat_T st;
|
|
|
|
// If the original file does not exist yet
|
|
// the current backup file becomes the original file
|
|
if (org == NULL)
|
|
emsg(_(e_patchmode_cant_save_original_file));
|
|
else if (mch_stat(org, &st) < 0)
|
|
{
|
|
vim_rename(backup, (char_u *)org);
|
|
VIM_CLEAR(backup); // don't delete the file
|
|
#ifdef UNIX
|
|
set_file_time((char_u *)org, st_old.st_atime, st_old.st_mtime);
|
|
#endif
|
|
}
|
|
}
|
|
// If there is no backup file, remember that a (new) file was
|
|
// created.
|
|
else
|
|
{
|
|
int empty_fd;
|
|
|
|
if (org == NULL
|
|
|| (empty_fd = mch_open(org,
|
|
O_CREAT | O_EXTRA | O_EXCL | O_NOFOLLOW,
|
|
perm < 0 ? 0666 : (perm & 0777))) < 0)
|
|
emsg(_(e_patchmode_cant_touch_empty_original_file));
|
|
else
|
|
close(empty_fd);
|
|
}
|
|
if (org != NULL)
|
|
{
|
|
mch_setperm((char_u *)org, mch_getperm(fname) & 0777);
|
|
vim_free(org);
|
|
}
|
|
}
|
|
|
|
// Remove the backup unless 'backup' option is set or there was a
|
|
// conversion error.
|
|
if (!p_bk && backup != NULL && !write_info.bw_conv_error
|
|
&& mch_remove(backup) != 0)
|
|
emsg(_(e_cant_delete_backup_file));
|
|
|
|
goto nofail;
|
|
|
|
// Finish up. We get here either after failure or success.
|
|
fail:
|
|
--no_wait_return; // may wait for return now
|
|
nofail:
|
|
|
|
// Done saving, we accept changed buffer warnings again
|
|
buf->b_saving = FALSE;
|
|
|
|
vim_free(backup);
|
|
if (buffer != smallbuf)
|
|
vim_free(buffer);
|
|
vim_free(fenc_tofree);
|
|
vim_free(write_info.bw_conv_buf);
|
|
#ifdef USE_ICONV
|
|
if (write_info.bw_iconv_fd != (iconv_t)-1)
|
|
{
|
|
iconv_close(write_info.bw_iconv_fd);
|
|
write_info.bw_iconv_fd = (iconv_t)-1;
|
|
}
|
|
#endif
|
|
#ifdef HAVE_ACL
|
|
mch_free_acl(acl);
|
|
#endif
|
|
|
|
if (errmsg != NULL)
|
|
{
|
|
int numlen = errnum != NULL ? (int)STRLEN(errnum) : 0;
|
|
|
|
attr = HL_ATTR(HLF_E); // set highlight for error messages
|
|
msg_add_fname(buf,
|
|
#ifndef UNIX
|
|
sfname
|
|
#else
|
|
fname
|
|
#endif
|
|
); // put file name in IObuff with quotes
|
|
if (STRLEN(IObuff) + STRLEN(errmsg) + numlen >= IOSIZE)
|
|
IObuff[IOSIZE - STRLEN(errmsg) - numlen - 1] = NUL;
|
|
// If the error message has the form "is ...", put the error number in
|
|
// front of the file name.
|
|
if (errnum != NULL)
|
|
{
|
|
STRMOVE(IObuff + numlen, IObuff);
|
|
mch_memmove(IObuff, errnum, (size_t)numlen);
|
|
}
|
|
STRCAT(IObuff, errmsg);
|
|
emsg((char *)IObuff);
|
|
if (errmsg_allocated)
|
|
vim_free(errmsg);
|
|
|
|
retval = FAIL;
|
|
if (end == 0)
|
|
{
|
|
msg_puts_attr(_("\nWARNING: Original file may be lost or damaged\n"),
|
|
attr | MSG_HIST);
|
|
msg_puts_attr(_("don't quit the editor until the file is successfully written!"),
|
|
attr | MSG_HIST);
|
|
|
|
// Update the timestamp to avoid an "overwrite changed file"
|
|
// prompt when writing again.
|
|
if (mch_stat((char *)fname, &st_old) >= 0)
|
|
{
|
|
buf_store_time(buf, &st_old, fname);
|
|
buf->b_mtime_read = buf->b_mtime;
|
|
buf->b_mtime_read_ns = buf->b_mtime_ns;
|
|
}
|
|
}
|
|
}
|
|
msg_scroll = msg_save;
|
|
|
|
#ifdef FEAT_PERSISTENT_UNDO
|
|
// When writing the whole file and 'undofile' is set, also write the undo
|
|
// file.
|
|
if (retval == OK && write_undo_file)
|
|
{
|
|
char_u hash[UNDO_HASH_SIZE];
|
|
|
|
sha256_finish(&sha_ctx, hash);
|
|
u_write_undo(NULL, FALSE, buf, hash);
|
|
}
|
|
#endif
|
|
|
|
#ifdef FEAT_EVAL
|
|
if (!should_abort(retval))
|
|
#else
|
|
if (!got_int)
|
|
#endif
|
|
{
|
|
aco_save_T aco;
|
|
|
|
curbuf->b_no_eol_lnum = 0; // in case it was set by the previous read
|
|
|
|
// Apply POST autocommands.
|
|
// Careful: The autocommands may call buf_write() recursively!
|
|
// Only do this when a window was found for "buf".
|
|
aucmd_prepbuf(&aco, buf);
|
|
if (curbuf == buf)
|
|
{
|
|
if (append)
|
|
apply_autocmds_exarg(EVENT_FILEAPPENDPOST, fname, fname,
|
|
FALSE, curbuf, eap);
|
|
else if (filtering)
|
|
apply_autocmds_exarg(EVENT_FILTERWRITEPOST, NULL, fname,
|
|
FALSE, curbuf, eap);
|
|
else if (reset_changed && whole)
|
|
apply_autocmds_exarg(EVENT_BUFWRITEPOST, fname, fname,
|
|
FALSE, curbuf, eap);
|
|
else
|
|
apply_autocmds_exarg(EVENT_FILEWRITEPOST, fname, fname,
|
|
FALSE, curbuf, eap);
|
|
|
|
// restore curwin/curbuf and a few other things
|
|
aucmd_restbuf(&aco);
|
|
}
|
|
|
|
#ifdef FEAT_EVAL
|
|
if (aborting()) // autocmds may abort script processing
|
|
retval = FALSE;
|
|
#endif
|
|
}
|
|
|
|
#ifdef FEAT_VIMINFO
|
|
// Make sure marks will be written out to the viminfo file later, even when
|
|
// the file is new.
|
|
curbuf->b_marks_read = TRUE;
|
|
#endif
|
|
|
|
got_int |= prev_got_int;
|
|
|
|
return retval;
|
|
}
|