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vim/src/pty.c
Zoltan Arpadffy 6fdb628082
patch 9.0.2180: POSIX function name in exarg causes issues 
Problem:  POSIX function name in exarg struct causes issues
          on OpenVMS
Solution: Rename getline member in exarg struct to ea_getline,
          remove isinf() workaround for VMS

There are compilers that do not treat well POSIX functions - like
getline - usage in the structs.

Older VMS compilers could digest this... but the newer OpenVMS compilers
( like VSI C x86-64 X7.4-843 (GEM 50XB9) ) cannot deal with these
structs. This could be limited to getline() that is defined via
getdelim() and might not affect all POSIX functions in general - but
avoiding POSIX function names usage in the structs is a "safe side"
practice without compromising the functionality or the code readability.

The previous OpenVMS X86 port used a workaround limiting the compiler
capabilities using __CRTL_VER_OVERRIDE=80400000
In order to make the OpenVMS port future proof, this pull request
proposes a possible solution.

closes: #13704

Signed-off-by: Zoltan Arpadffy <zoltan.arpadffy@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
2023-12-19 20:53:07 +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.
*/
/*
* The stuff in this file mostly comes from the "screen" program.
* Included with permission from Juergen Weigert.
* Copied from "pty.c". "putenv.c" was used for putenv() in misc2.c.
*
* It has been modified to work better with Vim.
* The parts that are not used in Vim have been deleted.
* See the "screen" sources for the complete stuff.
*
* This specific version is distributed under the Vim license (attribution by
* Juergen Weigert), the GPL applies to the original version, see the
* copyright notice below.
*/
// Copyright (c) 1993
// Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
// Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
// Copyright (c) 1987 Oliver Laumann
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program (see the file COPYING); if not, write to the
// Free Software Foundation, Inc.,
// 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
#include "vim.h"
#if defined(FEAT_GUI) || defined(FEAT_JOB_CHANNEL)
#include <signal.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#if HAVE_STROPTS_H
# include <sys/types.h>
# ifdef sinix
# define buf_T __system_buf_t__
# endif
# include <stropts.h>
# ifdef sinix
# undef buf_T
# endif
# ifdef SUN_SYSTEM
# include <sys/conf.h>
# if defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS)
# include <sys/ptms.h>
# endif
# endif
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#if HAVE_TERMIO_H
# include <termio.h>
#else
# ifdef HAVE_TERMIOS_H
# include <termios.h>
# endif
#endif
#if HAVE_SYS_STREAM_H
# include <sys/stream.h>
#endif
#if HAVE_SYS_PTEM_H
# include <sys/ptem.h>
#endif
#if !defined(SUN_SYSTEM) && !defined(VMS)
# include <sys/ioctl.h>
#endif
#if defined(SUN_SYSTEM) && defined(LOCKPTY) && !defined(TIOCEXCL)
# include <sys/ttold.h>
#endif
#ifdef ISC
# include <sys/tty.h>
# include <sys/sioctl.h>
# include <sys/pty.h>
#endif
#ifdef sgi
# include <sys/sysmacros.h>
#endif
#if defined(_INCLUDE_HPUX_SOURCE) && !defined(hpux)
# define hpux
#endif
/*
* if no PTYRANGE[01] is in the config file, we pick a default
*/
#ifndef PTYRANGE0
# define PTYRANGE0 "qprs"
#endif
#ifndef PTYRANGE1
# define PTYRANGE1 "0123456789abcdef"
#endif
// SVR4 pseudo ttys don't seem to work with SCO-5
#ifdef M_UNIX
# undef HAVE_SVR4_PTYS
#endif
/*
* Open all ptys with O_NOCTTY, just to be on the safe side.
*/
#ifndef O_NOCTTY
# define O_NOCTTY 0
#endif
#if defined(HAVE_SVR4_PTYS) || defined(HAVE_POSIX_OPENPT)
// These should be in stdlib.h, but it depends on _XOPEN_SOURCE.
char *ptsname(int);
int unlockpt(int);
int grantpt(int);
int posix_openpt(int flags);
#endif
static void
initmaster(int f UNUSED)
{
#ifndef VMS
# ifdef POSIX
tcflush(f, TCIOFLUSH);
# else
# ifdef TIOCFLUSH
(void)ioctl(f, TIOCFLUSH, (char *) 0);
# endif
# endif
# ifdef LOCKPTY
(void)ioctl(f, TIOCEXCL, (char *) 0);
# endif
#endif
}
/*
* This causes a hang on some systems, but is required for a properly working
* pty on others. Needs to be tuned...
*/
int
setup_slavepty(int fd)
{
if (fd < 0)
return 0;
#if defined(I_PUSH) && defined(HAVE_SVR4_PTYS) && !defined(sgi) \
&& !defined(linux) && !defined(__osf__) && !defined(M_UNIX)
# if defined(HAVE_SYS_PTEM_H) || defined(hpux)
if (ioctl(fd, I_PUSH, "ptem") != 0)
return -1;
# endif
if (ioctl(fd, I_PUSH, "ldterm") != 0)
return -1;
# ifdef SUN_SYSTEM
if (ioctl(fd, I_PUSH, "ttcompat") != 0)
return -1;
# endif
#endif
return 0;
}
#if defined(HAVE_POSIX_OPENPT) && !defined(PTY_DONE)
#define PTY_DONE
int
mch_openpty(char **ttyn)
{
int f;
char *m;
sighandler_T sigcld;
static char TtyName[32]; // used for opening a new pty-pair
if ((f = posix_openpt(O_RDWR | O_NOCTTY | O_EXTRA)) == -1)
return -1;
// SIGCHLD set to SIG_DFL for grantpt() because it fork()s and
// exec()s pt_chmod
sigcld = mch_signal(SIGCHLD, SIG_DFL);
if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f))
{
mch_signal(SIGCHLD, sigcld);
close(f);
return -1;
}
mch_signal(SIGCHLD, sigcld);
vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1);
initmaster(f);
*ttyn = TtyName;
return f;
}
#endif
#if defined(OSX) && !defined(PTY_DONE)
#define PTY_DONE
int
mch_openpty(char **ttyn)
{
int f;
static char TtyName[32];
if ((f = open_controlling_pty(TtyName)) < 0)
return -1;
initmaster(f);
*ttyn = TtyName;
return f;
}
#endif
#if (defined(sequent) || defined(_SEQUENT_)) && defined(HAVE_GETPSEUDOTTY) \
&& !defined(PTY_DONE)
#define PTY_DONE
int
mch_openpty(char **ttyn)
{
char *m, *s;
int f;
// used for opening a new pty-pair:
static char PtyName[32];
static char TtyName[32];
if ((f = getpseudotty(&s, &m)) < 0)
return -1;
#ifdef _SEQUENT_
fvhangup(s);
#endif
vim_strncpy((char_u *)PtyName, (char_u *)m, sizeof(PtyName) - 1);
vim_strncpy((char_u *)TtyName, (char_u *)s, sizeof(TtyName) - 1);
initmaster(f);
*ttyn = TtyName;
return f;
}
#endif
#if defined(MIPS) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
#define PTY_DONE
int
mch_openpty(char **ttyn)
{
int f;
stat_T buf;
// used for opening a new pty-pair:
static char TtyName[32];
if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_NONBLOCK | O_EXTRA, 0)) < 0)
return -1;
if (mch_fstat(f, &buf) < 0)
{
close(f);
return -1;
}
sprintf(TtyName, "/dev/ttyq%d", minor(buf.st_rdev));
initmaster(f);
*ttyn = TtyName;
return f;
}
#endif
#if defined(HAVE_SVR4_PTYS) && !defined(PTY_DONE) && !defined(hpux) \
&& !(defined(MACOS_X) && !defined(MAC_OS_X_VERSION_10_6))
// NOTE: Even though HPUX can have /dev/ptmx, the code below doesn't work!
// Same for Mac OS X Leopard (10.5).
#define PTY_DONE
int
mch_openpty(char **ttyn)
{
int f;
char *m;
sighandler_T sigcld;
// used for opening a new pty-pair:
static char TtyName[32];
if ((f = open("/dev/ptmx", O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1)
return -1;
/*
* SIGCHLD set to SIG_DFL for grantpt() because it fork()s and
* exec()s pt_chmod
*/
sigcld = mch_signal(SIGCHLD, SIG_DFL);
if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f))
{
mch_signal(SIGCHLD, sigcld);
close(f);
return -1;
}
mch_signal(SIGCHLD, sigcld);
vim_strncpy((char_u *)TtyName, (char_u *)m, sizeof(TtyName) - 1);
initmaster(f);
*ttyn = TtyName;
return f;
}
#endif
#if defined(_AIX) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
#define PTY_DONE
#ifdef _IBMR2
static int aixhack = -1;
#endif
int
mch_openpty(char **ttyn)
{
int f;
// used for opening a new pty-pair:
static char TtyName[32];
// a dumb looking loop replaced by mycrofts code:
if ((f = open("/dev/ptc", O_RDWR | O_NOCTTY | O_EXTRA)) < 0)
return -1;
vim_strncpy((char_u *)TtyName, (char_u *)ttyname(f), sizeof(TtyName) - 1);
if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
{
close(f);
return -1;
}
initmaster(f);
# ifdef _IBMR2
if (aixhack >= 0)
close(aixhack);
if ((aixhack = open(TtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) < 0)
{
close(f);
return -1;
}
# endif
*ttyn = TtyName;
return f;
}
#endif
#ifndef PTY_DONE
# ifdef hpux
static char PtyProto[] = "/dev/ptym/ptyXY";
static char TtyProto[] = "/dev/pty/ttyXY";
# else
# ifdef __HAIKU__
static char PtyProto[] = "/dev/pt/XY";
static char TtyProto[] = "/dev/tt/XY";
# else
static char PtyProto[] = "/dev/ptyXY";
static char TtyProto[] = "/dev/ttyXY";
# endif
# endif
int
mch_openpty(char **ttyn)
{
char *p, *q, *l, *d;
int f;
// used for opening a new pty-pair:
static char PtyName[32];
static char TtyName[32];
strcpy(PtyName, PtyProto);
strcpy(TtyName, TtyProto);
for (p = PtyName; *p != 'X'; p++)
;
for (q = TtyName; *q != 'X'; q++)
;
for (l = PTYRANGE0; (*p = *l) != '\0'; l++)
{
for (d = PTYRANGE1; (p[1] = *d) != '\0'; d++)
{
if ((f = open(PtyName, O_RDWR | O_NOCTTY | O_EXTRA, 0)) == -1)
continue;
q[0] = *l;
q[1] = *d;
if (geteuid() != ROOT_UID && mch_access(TtyName, R_OK | W_OK))
{
close(f);
continue;
}
#if defined(SUN_SYSTEM) && defined(TIOCGPGRP) && !defined(SUNOS3)
// Hack to ensure that the slave side of the pty is
// unused. May not work in anything other than SunOS4.1
{
int pgrp;
// tcgetpgrp does not work (uses TIOCGETPGRP)!
if (ioctl(f, TIOCGPGRP, (char *)&pgrp) != -1 || errno != EIO)
{
close(f);
continue;
}
}
#endif
initmaster(f);
*ttyn = TtyName;
return f;
}
}
return -1;
}
#endif
/*
* Call isatty(fd), except for SunOS where it's done differently.
*/
int
mch_isatty(int fd)
{
# if defined(I_STR) && defined(HAVE_SYS_PTMS_H) && defined(HAVE_SVR4_PTYS) \
&& defined(SUN_SYSTEM)
// On SunOS, isatty() for /dev/ptmx returns false or sometimes can hang up
// in the inner ioctl(), and therefore first determine whether "fd" is a
// master device.
struct strioctl istr;
istr.ic_cmd = ISPTM;
istr.ic_timout = 0;
istr.ic_dp = NULL;
istr.ic_len = 0;
if (ioctl(fd, I_STR, &istr) == 0)
// Trick: return 2 in order to advice the caller that "fd" is a master
// device. cf. src/os_unix.c:get_tty_fd()
return 2;
# endif
return isatty(fd);
}
#endif // FEAT_GUI || FEAT_JOB_CHANNEL
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