114 lines
3.0 KiB
C
114 lines
3.0 KiB
C
/* run.c
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Run a program.
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Copyright (C) 1992, 1993, 1994 Ian Lance Taylor
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This file is part of the Taylor UUCP package.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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The author of the program may be contacted at ian@airs.com or
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c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
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*/
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#include "uucp.h"
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#include "uudefs.h"
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#include "sysdep.h"
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#include "system.h"
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#include <errno.h>
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/* Start up a new program. */
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boolean
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fsysdep_run (ffork, zprogram, zarg1, zarg2)
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boolean ffork;
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const char *zprogram;
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const char *zarg1;
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const char *zarg2;
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{
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char *zlib;
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const char *azargs[4];
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int aidescs[3];
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pid_t ipid;
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/* If we are supposed to fork, fork and then spawn so that we don't
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have to worry about zombie processes. */
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if (ffork)
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{
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ipid = ixsfork ();
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if (ipid < 0)
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{
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ulog (LOG_ERROR, "fork: %s", strerror (errno));
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return FALSE;
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}
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if (ipid != 0)
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{
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/* This is the parent. Wait for the child we just forked to
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exit (below) and return. */
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(void) ixswait ((unsigned long) ipid, (const char *) NULL);
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/* Force the log files to be reopened in case the child just
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output any error messages and stdio doesn't handle
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appending correctly. */
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ulog_close ();
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return TRUE;
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}
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/* This is the child. Detach from the terminal to avoid any
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unexpected SIGHUP signals. At this point we are definitely
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not a process group leader, so usysdep_detach will not fork
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again. */
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usysdep_detach ();
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/* Now spawn the program and then exit. */
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}
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zlib = zbufalc (sizeof SBINDIR + sizeof "/" + strlen (zprogram));
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sprintf (zlib, "%s/%s", SBINDIR, zprogram);
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azargs[0] = zlib;
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azargs[1] = zarg1;
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azargs[2] = zarg2;
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azargs[3] = NULL;
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aidescs[0] = SPAWN_NULL;
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aidescs[1] = SPAWN_NULL;
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aidescs[2] = SPAWN_NULL;
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/* We pass fsetuid and fshell as TRUE, which permits uucico and
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uuxqt to be replaced by (non-setuid) shell scripts. */
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ipid = ixsspawn (azargs, aidescs, TRUE, FALSE, (const char *) NULL,
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FALSE, TRUE, (const char *) NULL,
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(const char *) NULL, (const char *) NULL);
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ubuffree (zlib);
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if (ipid < 0)
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{
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ulog (LOG_ERROR, "ixsspawn: %s", strerror (errno));
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if (ffork)
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_exit (EXIT_FAILURE);
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return FALSE;
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}
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if (ffork)
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_exit (EXIT_SUCCESS);
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return TRUE;
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}
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