diff options
Diffstat (limited to 'release/src/router/busybox/miscutils/setsid.c')
-rw-r--r-- | release/src/router/busybox/miscutils/setsid.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/release/src/router/busybox/miscutils/setsid.c b/release/src/router/busybox/miscutils/setsid.c new file mode 100644 index 00000000..d7de1f14 --- /dev/null +++ b/release/src/router/busybox/miscutils/setsid.c @@ -0,0 +1,36 @@ +/* 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 (getpgrp() == getpid()) + if (fork_or_rexec(argv)) + exit(EXIT_SUCCESS); /* parent */ + + setsid(); /* no error possible */ + + BB_EXECVP(argv[1], argv + 1); + bb_simple_perror_msg_and_die(argv[1]); +} |