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/*
* pty_cleanup: Kill processes associated with pty.
*
* (C)Copyright 1995, 1996 by the Massachusetts Institute of Technology.
*
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that the above copyright notice appear in all
* copies and that both that copyright notice and this permission
* notice appear in supporting documentation, and that the name of
* M.I.T. not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability
* of this software for any purpose. It is provided "as is" without
* express or implied warranty.
*
*/
#include <com_err.h>
#include "libpty.h"
#include "pty-int.h"
#ifdef HAVE_SYS_WAIT_H
#include <sys/wait.h>
#endif
long pty_cleanup (slave, pid, update_utmp)
char *slave;
int pid; /* May be zero for unknown.*/
int update_utmp;
{
int retval, fd;
if (update_utmp)
pty_update_utmp(PTY_DEAD_PROCESS,0, "", slave, (char *)0, PTY_UTMP_USERNAME_VALID);
(void)chmod(slave, 0666);
(void)chown(slave, 0, 0);
#ifdef HAVE_REVOKE
revoke(slave);
/*
* Revoke isn't guaranteed to send a SIGHUP to the processes it
* dissociates from the terminal. The best solution without a Posix
* mechanism for forcing a hangup is to killpg() the process
* group of the pty. This will at least kill the shell and
* hopefully, the child processes. This is not always the case, however.
* If the shell puts each job in a process group and doesn't pass
* along SIGHUP, all processes may not die.
*/
if ( pid > 0 ) {
#ifdef HAVE_KILLPG
killpg(pid, SIGHUP);
#else
kill( -(pid), SIGHUP );
#endif /*HAVE_KILLPG*/
}
#else /* HAVE_REVOKE*/
#ifdef VHANG_LAST
{
int status;
#ifdef POSIX_SIGNALS
sigset_t old, new;
sigemptyset(&new);
sigaddset(&new, SIGCHLD);
sigprocmask ( SIG_BLOCK, &new, &old);
#else /*POSIX_SIGNALS*/
int mask = sigblock(sigmask(SIGCHLD));
#endif /*POSIX_SIGNALS*/
switch (retval = fork()) {
case -1:
#ifdef POSIX_SIGNALS
sigprocmask(SIG_SETMASK, &old, 0);
#else /*POSIX_SIGNALS*/
sigsetmask(mask);
#endif /*POSIX_SIGNALS*/
return errno;
case 0:
ptyint_void_association();
if ( retval = ( pty_open_ctty( slave, &fd )))
exit(retval);
ptyint_vhangup();
exit(0);
break;
default:
#ifdef HAVE_WAITPID
waitpid(retval, &status, 0);
#else /*HAVE_WAITPID*/
wait(&status);
#endif
#ifdef POSIX_SIGNALS
sigprocmask(SIG_SETMASK, &old, 0);
#else /*POSIX_SIGNALS*/
sigsetmask(mask);
#endif /*POSIX_SIGNALS*/
break;
}
}
#endif /*VHANG_LAST*/
#endif /* HAVE_REVOKE*/
#ifndef HAVE_STREAMS
slave[strlen("/dev/")] = 'p';
(void)chmod(slave, 0666);
(void)chown(slave, 0, 0);
#endif
return 0;
}
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