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388 lines
8.0 KiB
C
388 lines
8.0 KiB
C
/* Copyright (c) 1993-2002
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* Juergen Weigert (jnweiger@immd4.informatik.uni-erlangen.de)
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* Michael Schroeder (mlschroe@immd4.informatik.uni-erlangen.de)
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* Copyright (c) 1987 Oliver Laumann
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program (see the file COPYING); if not, write to the
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* Free Software Foundation, Inc.,
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* 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
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*
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****************************************************************
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <signal.h>
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#include "config.h"
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#include "screen.h"
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#ifndef sun
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# include <sys/ioctl.h>
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#endif
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/* for solaris 2.1, Unixware (SVR4.2) and possibly others */
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#ifdef HAVE_SVR4_PTYS
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# include <sys/stropts.h>
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#endif
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#if defined(sun) && defined(LOCKPTY) && !defined(TIOCEXCL)
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# include <sys/ttold.h>
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#endif
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#ifdef ISC
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# include <sys/tty.h>
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# include <sys/sioctl.h>
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# include <sys/pty.h>
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#endif
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#ifdef sgi
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# include <sys/sysmacros.h>
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#endif /* sgi */
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#include "extern.h"
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/*
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* if no PTYRANGE[01] is in the config file, we pick a default
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*/
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#ifndef PTYRANGE0
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# define PTYRANGE0 "qpr"
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#endif
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#ifndef PTYRANGE1
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# define PTYRANGE1 "0123456789abcdef"
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#endif
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/* SVR4 pseudo ttys don't seem to work with SCO-5 */
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#ifdef M_UNIX
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# undef HAVE_SVR4_PTYS
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#endif
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extern int eff_uid;
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/* used for opening a new pty-pair: */
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static char PtyName[32], TtyName[32];
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#if !(defined(sequent) || defined(_SEQUENT_) || defined(HAVE_SVR4_PTYS))
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# ifdef hpux
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static char PtyProto[] = "/dev/ptym/ptyXY";
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static char TtyProto[] = "/dev/pty/ttyXY";
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# else
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# ifdef M_UNIX
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static char PtyProto[] = "/dev/ptypXY";
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static char TtyProto[] = "/dev/ttypXY";
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# else
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static char PtyProto[] = "/dev/ptyXY";
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static char TtyProto[] = "/dev/ttyXY";
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# endif
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# endif /* hpux */
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#endif
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static void initmaster __P((int));
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#if defined(sun)
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/* sun's utmp_update program opens the salve side, thus corrupting
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*/
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int pty_preopen = 1;
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#else
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int pty_preopen = 0;
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#endif
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/*
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* Open all ptys with O_NOCTTY, just to be on the safe side
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* (RISCos mips breaks otherwise)
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*/
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#ifndef O_NOCTTY
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# define O_NOCTTY 0
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#endif
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/***************************************************************/
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static void
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initmaster(f)
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int f;
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{
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#ifdef POSIX
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tcflush(f, TCIOFLUSH);
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#else
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# ifdef TIOCFLUSH
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(void) ioctl(f, TIOCFLUSH, (char *) 0);
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# endif
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#endif
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#ifdef LOCKPTY
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(void) ioctl(f, TIOCEXCL, (char *) 0);
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#endif
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}
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void
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InitPTY(f)
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int f;
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{
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if (f < 0)
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return;
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#if defined(I_PUSH) && defined(HAVE_SVR4_PTYS) && !defined(sgi) && !defined(linux) && !defined(__osf__) && !defined(M_UNIX)
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if (ioctl(f, I_PUSH, "ptem"))
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Panic(errno, "InitPTY: cannot I_PUSH ptem");
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if (ioctl(f, I_PUSH, "ldterm"))
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Panic(errno, "InitPTY: cannot I_PUSH ldterm");
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# ifdef sun
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if (ioctl(f, I_PUSH, "ttcompat"))
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Panic(errno, "InitPTY: cannot I_PUSH ttcompat");
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# endif
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#endif
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}
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/***************************************************************/
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#if defined(OSX) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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register int f;
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if ((f = open_controlling_pty(TtyName)) < 0)
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return -1;
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initmaster(f);
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#if (defined(sequent) || defined(_SEQUENT_)) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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char *m, *s;
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register int f;
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if ((f = getpseudotty(&s, &m)) < 0)
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return -1;
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#ifdef _SEQUENT_
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fvhangup(s);
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#endif
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strncpy(PtyName, m, sizeof(PtyName));
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strncpy(TtyName, s, sizeof(TtyName));
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initmaster(f);
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#if defined(__sgi) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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int f;
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char *name, *_getpty();
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sigret_t (*sigcld)__P(SIGPROTOARG);
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/*
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* SIGCHLD set to SIG_DFL for _getpty() because it may fork() and
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* exec() /usr/adm/mkpts
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*/
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sigcld = signal(SIGCHLD, SIG_DFL);
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name = _getpty(&f, O_RDWR | O_NONBLOCK, 0600, 0);
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signal(SIGCHLD, sigcld);
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if (name == 0)
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return -1;
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initmaster(f);
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*ttyn = name;
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return f;
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}
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#endif
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/***************************************************************/
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#if defined(MIPS) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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register int f;
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struct stat buf;
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strcpy(PtyName, "/dev/ptc");
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if ((f = open(PtyName, O_RDWR | O_NOCTTY | O_NONBLOCK)) < 0)
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return -1;
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if (fstat(f, &buf) < 0)
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{
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close(f);
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return -1;
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}
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sprintf(TtyName, "/dev/ttyq%d", minor(buf.st_rdev));
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initmaster(f);
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#if defined(HAVE_SVR4_PTYS) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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register int f;
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char *m, *ptsname();
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int unlockpt __P((int)), grantpt __P((int));
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#if defined(HAVE_GETPT) && defined(linux)
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int getpt __P((void));
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#endif
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sigret_t (*sigcld)__P(SIGPROTOARG);
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strcpy(PtyName, "/dev/ptmx");
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#if defined(HAVE_GETPT) && defined(linux)
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if ((f = getpt()) == -1)
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#else
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if ((f = open(PtyName, O_RDWR | O_NOCTTY)) == -1)
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#endif
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return -1;
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/*
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* SIGCHLD set to SIG_DFL for grantpt() because it fork()s and
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* exec()s pt_chmod
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*/
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sigcld = signal(SIGCHLD, SIG_DFL);
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if ((m = ptsname(f)) == NULL || grantpt(f) || unlockpt(f))
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{
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signal(SIGCHLD, sigcld);
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close(f);
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return -1;
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}
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signal(SIGCHLD, sigcld);
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strncpy(TtyName, m, sizeof(TtyName));
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initmaster(f);
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#if defined(_AIX) && defined(HAVE_DEV_PTC) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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register int f;
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/* a dumb looking loop replaced by mycrofts code: */
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strcpy (PtyName, "/dev/ptc");
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if ((f = open (PtyName, O_RDWR | O_NOCTTY)) < 0)
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return -1;
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strncpy(TtyName, ttyname(f), sizeof(TtyName));
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if (eff_uid && access(TtyName, R_OK | W_OK))
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{
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close(f);
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return -1;
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}
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initmaster(f);
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# ifdef _IBMR2
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pty_preopen = 1;
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# endif
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#if defined(HAVE_OPENPTY) && !defined(PTY_DONE)
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#define PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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int f, s;
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if (openpty(&f, &s, TtyName, NULL, NULL) != 0)
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return -1;
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close(s);
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initmaster(f);
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pty_preopen = 1;
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*ttyn = TtyName;
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return f;
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}
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#endif
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/***************************************************************/
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#ifndef PTY_DONE
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int
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OpenPTY(ttyn)
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char **ttyn;
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{
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register char *p, *q, *l, *d;
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register int f;
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debug("OpenPTY: Using BSD style ptys.\n");
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strcpy(PtyName, PtyProto);
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strcpy(TtyName, TtyProto);
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for (p = PtyName; *p != 'X'; p++)
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;
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for (q = TtyName; *q != 'X'; q++)
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;
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for (l = PTYRANGE0; (*p = *l) != '\0'; l++)
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{
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for (d = PTYRANGE1; (p[1] = *d) != '\0'; d++)
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{
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debug1("OpenPTY tries '%s'\n", PtyName);
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if ((f = open(PtyName, O_RDWR | O_NOCTTY)) == -1)
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continue;
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q[0] = *l;
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q[1] = *d;
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if (eff_uid && access(TtyName, R_OK | W_OK))
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{
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close(f);
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continue;
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}
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#if defined(sun) && defined(TIOCGPGRP) && !defined(SUNOS3)
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/* Hack to ensure that the slave side of the pty is
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* unused. May not work in anything other than SunOS4.1
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*/
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{
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int pgrp;
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/* tcgetpgrp does not work (uses TIOCGETPGRP)! */
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if (ioctl(f, TIOCGPGRP, (char *)&pgrp) != -1 || errno != EIO)
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{
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close(f);
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continue;
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}
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}
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#endif
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initmaster(f);
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*ttyn = TtyName;
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return f;
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}
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}
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return -1;
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}
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#endif
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