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/* run.c
Run a program.
Copyright (C) 1992, 1993, 1994 Ian Lance Taylor
This file is part of the Taylor UUCP package.
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 of the
License, 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; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
The author of the program may be contacted at ian@airs.com or
c/o Cygnus Support, Building 200, 1 Kendall Square, Cambridge, MA 02139.
*/
#include "uucp.h"
#include "uudefs.h"
#include "sysdep.h"
#include "system.h"
#include <errno.h>
/* Start up a new program. */
boolean
fsysdep_run (ffork, zprogram, zarg1, zarg2)
boolean ffork;
const char *zprogram;
const char *zarg1;
const char *zarg2;
{
char *zlib;
const char *azargs[4];
int aidescs[3];
pid_t ipid;
/* If we are supposed to fork, fork and then spawn so that we don't
have to worry about zombie processes. */
if (ffork)
{
ipid = ixsfork ();
if (ipid < 0)
{
ulog (LOG_ERROR, "fork: %s", strerror (errno));
return FALSE;
}
if (ipid != 0)
{
/* This is the parent. Wait for the child we just forked to
exit (below) and return. */
(void) ixswait ((unsigned long) ipid, (const char *) NULL);
/* Force the log files to be reopened in case the child just
output any error messages and stdio doesn't handle
appending correctly. */
ulog_close ();
return TRUE;
}
/* This is the child. Detach from the terminal to avoid any
unexpected SIGHUP signals. At this point we are definitely
not a process group leader, so usysdep_detach will not fork
again. */
usysdep_detach ();
/* Now spawn the program and then exit. */
}
zlib = zbufalc (sizeof SBINDIR + sizeof "/" + strlen (zprogram));
sprintf (zlib, "%s/%s", SBINDIR, zprogram);
azargs[0] = zlib;
azargs[1] = zarg1;
azargs[2] = zarg2;
azargs[3] = NULL;
aidescs[0] = SPAWN_NULL;
aidescs[1] = SPAWN_NULL;
aidescs[2] = SPAWN_NULL;
/* We pass fsetuid and fshell as TRUE, which permits uucico and
uuxqt to be replaced by (non-setuid) shell scripts. */
ipid = ixsspawn (azargs, aidescs, TRUE, FALSE, (const char *) NULL,
FALSE, TRUE, (const char *) NULL,
(const char *) NULL, (const char *) NULL);
ubuffree (zlib);
if (ipid < 0)
{
ulog (LOG_ERROR, "ixsspawn: %s", strerror (errno));
if (ffork)
_exit (EXIT_FAILURE);
return FALSE;
}
if (ffork)
_exit (EXIT_SUCCESS);
return TRUE;
}
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