diff options
Diffstat (limited to 'include/libbb.h')
| -rw-r--r-- | include/libbb.h | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/include/libbb.h b/include/libbb.h index 044d09047..72d6c7dc8 100644 --- a/include/libbb.h +++ b/include/libbb.h @@ -812,21 +812,22 @@ int bb_execvp(const char *file, char *const argv[]) FAST_FUNC; #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd, __VA_ARGS__) #endif -/* NOMMU friendy fork+exec */ +/* NOMMU friendy fork+exec: */ pid_t spawn(char **argv) FAST_FUNC; pid_t xspawn(char **argv) FAST_FUNC; pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC; -/* Unlike waitpid, waits ONLY for one process. +pid_t wait_any_nohang(int *wstat) FAST_FUNC; +/* wait4pid: unlike waitpid, waits ONLY for one process. + * Returns sig + 0x180 if child is killed by signal. * It's safe to pass negative 'pids' from failed [v]fork - * wait4pid will return -1 (and will not clobber [v]fork's errno). * IOW: rc = wait4pid(spawn(argv)); * if (rc < 0) bb_perror_msg("%s", argv[0]); - * if (rc > 0) bb_error_msg("exit code: %d", rc); + * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff); */ int wait4pid(pid_t pid) FAST_FUNC; -pid_t wait_any_nohang(int *wstat) FAST_FUNC; -/* wait4pid(spawn(argv)) + NOFORK/NOEXEC (if configured) */ +/* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */ int spawn_and_wait(char **argv) FAST_FUNC; struct nofork_save_area { jmp_buf die_jmp; |