use vfork if possible in posix_spawn

[musl] / src / process / posix_spawn.c

diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c
index 1120be0..604756e 100644 (file)
--- a/src/process/posix_spawn.c
+++ b/src/process/posix_spawn.c
@@ -8,6 +8,8 @@
 
 extern char **environ;
 
+pid_t __vfork(void);
+
 int __posix_spawnx(pid_t *restrict res, const char *restrict path,
        int (*exec)(const char *, char *const *),
        const posix_spawn_file_actions_t *fa,
@@ -22,7 +24,7 @@ int __posix_spawnx(pid_t *restrict res, const char *restrict path,
        if (!attr) attr = &dummy_attr;
 
        sigprocmask(SIG_BLOCK, (void *)(uint64_t []){-1}, &oldmask);
-       pid = __syscall(SYS_fork);
+       pid = __vfork();
 
        if (pid) {
                sigprocmask(SIG_SETMASK, &oldmask, 0);