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vim/src/bufwrite.c
John Marriott fbe2dd7b4c
patch 9.1.1129: missing out-of-memory test in buf_write() 
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>
2025-02-20 23:17:09 +01:00

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/* vi:set ts=8 sts=4 sw=4 noet:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* bufwrite.c: functions for writing a buffer
*/
#include "vim.h"
#if defined(HAVE_UTIME) && defined(HAVE_UTIME_H)
# include <utime.h> // for struct utimbuf
#endif
#define SMALLBUFSIZE 256 // size of emergency write buffer
/*
* Structure to pass arguments from buf_write() to buf_write_bytes().
*/
struct bw_info
{
int bw_fd; // file descriptor
char_u *bw_buf; // buffer with data to be written
int bw_len; // length of data
int bw_flags; // FIO_ flags
#ifdef FEAT_CRYPT
buf_T *bw_buffer; // buffer being written
int bw_finish; // finish encrypting
#endif
char_u bw_rest[CONV_RESTLEN]; // not converted bytes
int bw_restlen; // nr of bytes in bw_rest[]
int bw_first; // first write call
char_u *bw_conv_buf; // buffer for writing converted chars
size_t bw_conv_buflen; // size of bw_conv_buf
int bw_conv_error; // set for conversion error
linenr_T bw_conv_error_lnum; // first line with error or zero
linenr_T bw_start_lnum; // line number at start of buffer
#ifdef USE_ICONV
iconv_t bw_iconv_fd; // descriptor for iconv() or -1
#endif
};
/*
* Convert a Unicode character to bytes.
* Return TRUE for an error, FALSE when it's OK.
*/
static int
ucs2bytes(
unsigned c, // in: character
char_u **pp, // in/out: pointer to result
int flags) // FIO_ flags
{
char_u *p = *pp;
int error = FALSE;
int cc;
if (flags & FIO_UCS4)
{
if (flags & FIO_ENDIAN_L)
{
*p++ = c;
*p++ = (c >> 8);
*p++ = (c >> 16);
*p++ = (c >> 24);
}
else
{
*p++ = (c >> 24);
*p++ = (c >> 16);
*p++ = (c >> 8);
*p++ = c;
}
}
else if (flags & (FIO_UCS2 | FIO_UTF16))
{
if (c >= 0x10000)
{
if (flags & FIO_UTF16)
{
// Make two words, ten bits of the character in each. First
// word is 0xd800 - 0xdbff, second one 0xdc00 - 0xdfff
c -= 0x10000;
if (c >= 0x100000)
error = TRUE;
cc = ((c >> 10) & 0x3ff) + 0xd800;
if (flags & FIO_ENDIAN_L)
{
*p++ = cc;
*p++ = ((unsigned)cc >> 8);
}
else
{
*p++ = ((unsigned)cc >> 8);
*p++ = cc;
}
c = (c & 0x3ff) + 0xdc00;
}
else
error = TRUE;
}
if (flags & FIO_ENDIAN_L)
{
*p++ = c;
*p++ = (c >> 8);
}
else
{
*p++ = (c >> 8);
*p++ = c;
}
}
else // Latin1
{
if (c >= 0x100)
{
error = TRUE;
*p++ = 0xBF;
}
else
*p++ = c;
}
*pp = p;
return error;
}
/*
* Call write() to write a number of bytes to the file.
* Handles encryption and 'encoding' conversion.
*
* Return FAIL for failure, OK otherwise.
*/
static int
buf_write_bytes(struct bw_info *ip)
{
int wlen;
char_u *buf = ip->bw_buf; // data to write
int len = ip->bw_len; // length of data
int flags = ip->bw_flags; // extra flags
// Skip conversion when writing the crypt magic number or the BOM.
if (!(flags & FIO_NOCONVERT))
{
char_u *p;
unsigned c;
int n;
if (flags & FIO_UTF8)
{
// Convert latin1 in the buffer to UTF-8 in the file.
p = ip->bw_conv_buf; // translate to buffer
for (wlen = 0; wlen < len; ++wlen)
p += utf_char2bytes(buf[wlen], p);
buf = ip->bw_conv_buf;
len = (int)(p - ip->bw_conv_buf);
}
else if (flags & (FIO_UCS4 | FIO_UTF16 | FIO_UCS2 | FIO_LATIN1))
{
// Convert UTF-8 bytes in the buffer to UCS-2, UCS-4, UTF-16 or
// Latin1 chars in the file.
if (flags & FIO_LATIN1)
p = buf; // translate in-place (can only get shorter)
else
p = ip->bw_conv_buf; // translate to buffer
for (wlen = 0; wlen < len; wlen += n)
{
if (wlen == 0 && ip->bw_restlen != 0)
{
int l;
// Use remainder of previous call. Append the start of
// buf[] to get a full sequence. Might still be too
// short!
l = CONV_RESTLEN - ip->bw_restlen;
if (l > len)
l = len;
mch_memmove(ip->bw_rest + ip->bw_restlen, buf, (size_t)l);
n = utf_ptr2len_len(ip->bw_rest, ip->bw_restlen + l);
if (n > ip->bw_restlen + len)
{
// We have an incomplete byte sequence at the end to
// be written. We can't convert it without the
// remaining bytes. Keep them for the next call.
if (ip->bw_restlen + len > CONV_RESTLEN)
return FAIL;
ip->bw_restlen += len;
break;
}
if (n > 1)
c = utf_ptr2char(ip->bw_rest);
else
c = ip->bw_rest[0];
if (n >= ip->bw_restlen)
{
n -= ip->bw_restlen;
ip->bw_restlen = 0;
}
else
{
ip->bw_restlen -= n;
mch_memmove(ip->bw_rest, ip->bw_rest + n,
(size_t)ip->bw_restlen);
n = 0;
}
}
else
{
n = utf_ptr2len_len(buf + wlen, len - wlen);
if (n > len - wlen)
{
// We have an incomplete byte sequence at the end to
// be written. We can't convert it without the
// remaining bytes. Keep them for the next call.
if (len - wlen > CONV_RESTLEN)
return FAIL;
ip->bw_restlen = len - wlen;
mch_memmove(ip->bw_rest, buf + wlen,
(size_t)ip->bw_restlen);
break;
}
if (n > 1)
c = utf_ptr2char(buf + wlen);
else
c = buf[wlen];
}
if (ucs2bytes(c, &p, flags) && !ip->bw_conv_error)
{
ip->bw_conv_error = TRUE;
ip->bw_conv_error_lnum = ip->bw_start_lnum;
}
if (c == NL)
++ip->bw_start_lnum;
}
if (flags & FIO_LATIN1)
len = (int)(p - buf);
else
{
buf = ip->bw_conv_buf;
len = (int)(p - ip->bw_conv_buf);
}
}
#ifdef MSWIN
else if (flags & FIO_CODEPAGE)
{
// Convert UTF-8 or codepage to UCS-2 and then to MS-Windows
// codepage.
char_u *from;
size_t fromlen;
char_u *to;
int u8c;
BOOL bad = FALSE;
int needed;
if (ip->bw_restlen > 0)
{
// Need to concatenate the remainder of the previous call and
// the bytes of the current call. Use the end of the
// conversion buffer for this.
fromlen = len + ip->bw_restlen;
from = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
mch_memmove(from, ip->bw_rest, (size_t)ip->bw_restlen);
mch_memmove(from + ip->bw_restlen, buf, (size_t)len);
}
else
{
from = buf;
fromlen = len;
}
to = ip->bw_conv_buf;
if (enc_utf8)
{
// Convert from UTF-8 to UCS-2, to the start of the buffer.
// The buffer has been allocated to be big enough.
while (fromlen > 0)
{
n = (int)utf_ptr2len_len(from, (int)fromlen);
if (n > (int)fromlen) // incomplete byte sequence
break;
u8c = utf_ptr2char(from);
*to++ = (u8c & 0xff);
*to++ = (u8c >> 8);
fromlen -= n;
from += n;
}
// Copy remainder to ip->bw_rest[] to be used for the next
// call.
if (fromlen > CONV_RESTLEN)
{
// weird overlong sequence
ip->bw_conv_error = TRUE;
return FAIL;
}
mch_memmove(ip->bw_rest, from, fromlen);
ip->bw_restlen = (int)fromlen;
}
else
{
// Convert from enc_codepage to UCS-2, to the start of the
// buffer. The buffer has been allocated to be big enough.
ip->bw_restlen = 0;
needed = MultiByteToWideChar(enc_codepage,
MB_ERR_INVALID_CHARS, (LPCSTR)from, (int)fromlen,
NULL, 0);
if (needed == 0)
{
// When conversion fails there may be a trailing byte.
needed = MultiByteToWideChar(enc_codepage,
MB_ERR_INVALID_CHARS, (LPCSTR)from, (int)fromlen - 1,
NULL, 0);
if (needed == 0)
{
// Conversion doesn't work.
ip->bw_conv_error = TRUE;
return FAIL;
}
// Save the trailing byte for the next call.
ip->bw_rest[0] = from[fromlen - 1];
ip->bw_restlen = 1;
}
needed = MultiByteToWideChar(enc_codepage, MB_ERR_INVALID_CHARS,
(LPCSTR)from, (int)(fromlen - ip->bw_restlen),
(LPWSTR)to, needed);
if (needed == 0)
{
// Safety check: Conversion doesn't work.
ip->bw_conv_error = TRUE;
return FAIL;
}
to += needed * 2;
}
fromlen = to - ip->bw_conv_buf;
buf = to;
# ifdef CP_UTF8 // VC 4.1 doesn't define CP_UTF8
if (FIO_GET_CP(flags) == CP_UTF8)
{
// Convert from UCS-2 to UTF-8, using the remainder of the
// conversion buffer. Fails when out of space.
for (from = ip->bw_conv_buf; fromlen > 1; fromlen -= 2)
{
u8c = *from++;
u8c += (*from++ << 8);
to += utf_char2bytes(u8c, to);
if (to + 6 >= ip->bw_conv_buf + ip->bw_conv_buflen)
{
ip->bw_conv_error = TRUE;
return FAIL;
}
}
len = (int)(to - buf);
}
else
# endif
{
// Convert from UCS-2 to the codepage, using the remainder of
// the conversion buffer. If the conversion uses the default
// character "0", the data doesn't fit in this encoding, so
// fail.
len = WideCharToMultiByte(FIO_GET_CP(flags), 0,
(LPCWSTR)ip->bw_conv_buf, (int)fromlen / sizeof(WCHAR),
(LPSTR)to, (int)(ip->bw_conv_buflen - fromlen), 0,
&bad);
if (bad)
{
ip->bw_conv_error = TRUE;
return FAIL;
}
}
}
#endif
#ifdef MACOS_CONVERT
else if (flags & FIO_MACROMAN)
{
// Convert UTF-8 or latin1 to Apple MacRoman.
char_u *from;
size_t fromlen;
if (ip->bw_restlen > 0)
{
// Need to concatenate the remainder of the previous call and
// the bytes of the current call. Use the end of the
// conversion buffer for this.
fromlen = len + ip->bw_restlen;
from = ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
mch_memmove(from, ip->bw_rest, (size_t)ip->bw_restlen);
mch_memmove(from + ip->bw_restlen, buf, (size_t)len);
}
else
{
from = buf;
fromlen = len;
}
if (enc2macroman(from, fromlen,
ip->bw_conv_buf, &len, ip->bw_conv_buflen,
ip->bw_rest, &ip->bw_restlen) == FAIL)
{
ip->bw_conv_error = TRUE;
return FAIL;
}
buf = ip->bw_conv_buf;
}
#endif
#ifdef USE_ICONV
if (ip->bw_iconv_fd != (iconv_t)-1)
{
const char *from;
size_t fromlen;
char *to;
size_t tolen;
// Convert with iconv().
if (ip->bw_restlen > 0)
{
char *fp;
// Need to concatenate the remainder of the previous call and
// the bytes of the current call. Use the end of the
// conversion buffer for this.
fromlen = len + ip->bw_restlen;
fp = (char *)ip->bw_conv_buf + ip->bw_conv_buflen - fromlen;
mch_memmove(fp, ip->bw_rest, (size_t)ip->bw_restlen);
mch_memmove(fp + ip->bw_restlen, buf, (size_t)len);
from = fp;
tolen = ip->bw_conv_buflen - fromlen;
}
else
{
from = (const char *)buf;
fromlen = len;
tolen = ip->bw_conv_buflen;
}
to = (char *)ip->bw_conv_buf;
if (ip->bw_first)
{
size_t save_len = tolen;
// output the initial shift state sequence
(void)iconv(ip->bw_iconv_fd, NULL, NULL, &to, &tolen);
// There is a bug in iconv() on Linux (which appears to be
// wide-spread) which sets "to" to NULL and messes up "tolen".
if (to == NULL)
{
to = (char *)ip->bw_conv_buf;
tolen = save_len;
}
ip->bw_first = FALSE;
}
// If iconv() has an error or there is not enough room, fail.
if ((iconv(ip->bw_iconv_fd, (void *)&from, &fromlen, &to, &tolen)
== (size_t)-1 && ICONV_ERRNO != ICONV_EINVAL)
|| fromlen > CONV_RESTLEN)
{
ip->bw_conv_error = TRUE;
return FAIL;
}
// copy remainder to ip->bw_rest[] to be used for the next call.
if (fromlen > 0)
mch_memmove(ip->bw_rest, (void *)from, fromlen);
ip->bw_restlen = (int)fromlen;
buf = ip->bw_conv_buf;
len = (int)((char_u *)to - ip->bw_conv_buf);
}
#endif
}
if (ip->bw_fd < 0)
// Only checking conversion, which is OK if we get here.
return OK;
#ifdef FEAT_CRYPT
if (flags & FIO_ENCRYPTED)
{
// Encrypt the data. Do it in-place if possible, otherwise use an
// allocated buffer.
# ifdef CRYPT_NOT_INPLACE
if (crypt_works_inplace(ip->bw_buffer->b_cryptstate))
{
# endif
crypt_encode_inplace(ip->bw_buffer->b_cryptstate, buf, len,
ip->bw_finish);
# ifdef CRYPT_NOT_INPLACE
}
else
{
char_u *outbuf;
len = crypt_encode_alloc(curbuf->b_cryptstate, buf, len, &outbuf,
ip->bw_finish);
if (len == 0)
return OK; // Crypt layer is buffering, will flush later.
wlen = write_eintr(ip->bw_fd, outbuf, len);
vim_free(outbuf);
return (wlen < len) ? FAIL : OK;
}
# endif
}
#endif
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;
}
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