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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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- The author of the program may be contacted at ian@airs.com or
- c/o Cygnus Support, 48 Grove Street, Somerville, MA 02144.
- */
-
- #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;
- }
-