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block uid/gid changes during posix_spawn
[musl]
/
src
/
process
/
posix_spawn.c
diff --git
a/src/process/posix_spawn.c
b/src/process/posix_spawn.c
index
b1a9fbd
..
8a6ff6d
100644
(file)
--- a/
src/process/posix_spawn.c
+++ b/
src/process/posix_spawn.c
@@
-5,13
+5,23
@@
#include <fcntl.h>
#include "syscall.h"
#include "fdop.h"
#include <fcntl.h>
#include "syscall.h"
#include "fdop.h"
+#include "libc.h"
extern char **environ;
extern char **environ;
-int __posix_spawnx(pid_t *res, const char *path,
+static void dummy_0()
+{
+}
+weak_alias(dummy_0, __acquire_ptc);
+weak_alias(dummy_0, __release_ptc);
+
+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,
int (*exec)(const char *, char *const *),
const posix_spawn_file_actions_t *fa,
- const posix_spawnattr_t *attr, char **argv, char **envp)
+ const posix_spawnattr_t *restrict attr,
+ char *const argv[restrict], char *const envp[restrict])
{
pid_t pid;
sigset_t oldmask;
{
pid_t pid;
sigset_t oldmask;
@@
-21,7
+31,10
@@
int __posix_spawnx(pid_t *res, const char *path,
if (!attr) attr = &dummy_attr;
sigprocmask(SIG_BLOCK, (void *)(uint64_t []){-1}, &oldmask);
if (!attr) attr = &dummy_attr;
sigprocmask(SIG_BLOCK, (void *)(uint64_t []){-1}, &oldmask);
- pid = __syscall(SYS_fork);
+
+ __acquire_ptc();
+ pid = __vfork();
+ __release_ptc();
if (pid) {
sigprocmask(SIG_SETMASK, &oldmask, 0);
if (pid) {
sigprocmask(SIG_SETMASK, &oldmask, 0);
@@
-81,16
+94,17
@@
int __posix_spawnx(pid_t *res, const char *path,
sigprocmask(SIG_SETMASK, (attr->__flags & POSIX_SPAWN_SETSIGMASK)
? &attr->__mask : &oldmask, 0);
sigprocmask(SIG_SETMASK, (attr->__flags & POSIX_SPAWN_SETSIGMASK)
? &attr->__mask : &oldmask, 0);
- if (envp) environ = envp;
+ if (envp) environ =
(char **)
envp;
exec(path, argv);
_exit(127);
return 0;
}
exec(path, argv);
_exit(127);
return 0;
}
-int posix_spawn(pid_t *res
, const char *
path,
+int posix_spawn(pid_t *res
trict res, const char *restrict
path,
const posix_spawn_file_actions_t *fa,
const posix_spawn_file_actions_t *fa,
- const posix_spawnattr_t *attr, char **argv, char **envp)
+ const posix_spawnattr_t *restrict attr,
+ char *const argv[restrict], char *const envp[restrict])
{
return __posix_spawnx(res, path, execv, fa, attr, argv, envp);
}
{
return __posix_spawnx(res, path, execv, fa, attr, argv, envp);
}