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- /* vi: set sw=4 ts=4: */
- /*
- * setsid.c -- execute a command in a new session
- * Rick Sladkey <jrs@world.std.com>
- * In the public domain.
- *
- * 1999-02-22 Arkadiusz Mickiewicz <misiek@pld.ORG.PL>
- * - added Native Language Support
- *
- * 2001-01-18 John Fremlin <vii@penguinpowered.com>
- * - fork in case we are process group leader
- *
- * 2004-11-12 Paul Fox
- * - busyboxed
- */
- #include "libbb.h"
- int setsid_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
- int setsid_main(int argc UNUSED_PARAM, char **argv)
- {
- if (!argv[1])
- bb_show_usage();
- /* setsid() is allowed only when we are not a process group leader.
- * Otherwise our PID serves as PGID of some existing process group
- * and cannot be used as PGID of a new process group. */
- if (setsid() < 0) {
- pid_t pid = fork_or_rexec(argv);
- if (pid != 0) {
- /* parent */
- /* TODO:
- * we can waitpid(pid, &status, 0) and then even
- * emulate exitcode, making the behavior consistent
- * in both forked and non forked cases.
- * However, the code is larger and upstream
- * does not do such trick.
- */
- exit(EXIT_SUCCESS);
- }
- /* child */
- /* now there should be no error: */
- setsid();
- }
- argv++;
- BB_EXECVP_or_die(argv);
- }
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