X-Git-Url: http://nsz.repo.hu/git/?p=musl;a=blobdiff_plain;f=src%2Fprocess%2Fposix_spawn.c;h=c3e800b879553627daef047bae08bea4313d95ea;hp=e718cee30c2af9b4d3e0d8527f2bcff868ed4662;hb=97c8bdd88ae2ee03eb9d333a79fa669b3878fc76;hpb=c97f0d998cae23472ea30564663a8612dcfb6f83

diff --git a/src/process/posix_spawn.c b/src/process/posix_spawn.c
index e718cee3..c3e800b8 100644
--- a/src/process/posix_spawn.c
+++ b/src/process/posix_spawn.c
@@ -2,14 +2,27 @@
 #include <unistd.h>
 #include <signal.h>
 #include <stdint.h>
+#include <fcntl.h>
 #include "syscall.h"
+#include "pthread_impl.h"
+#include "fdop.h"
+#include "libc.h"
 
 extern char **environ;
 
-int __posix_spawnx(pid_t *res, const char *path,
-	int (*exec)(const char *, char *const *),
+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 *, 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;
@@ -18,8 +31,11 @@ int __posix_spawnx(pid_t *res, const char *path,
 
 	if (!attr) attr = &dummy_attr;
 
-	sigprocmask(SIG_BLOCK, (void *)(uint64_t []){-1}, &oldmask);
-	pid = __syscall(SYS_fork);
+	sigprocmask(SIG_BLOCK, SIGALL_SET, &oldmask);
+
+	__acquire_ptc();
+	pid = __vfork();
+	__release_ptc();
 
 	if (pid) {
 		sigprocmask(SIG_SETMASK, &oldmask, 0);
@@ -28,12 +44,14 @@ int __posix_spawnx(pid_t *res, const char *path,
 		return 0;
 	}
 
-	for (i=1; i<=64; i++) {
+	for (i=1; i<=8*__SYSCALL_SSLEN; i++) {
 		struct sigaction sa;
-		sigaction(i, 0, &sa);
-		if (sa.sa_handler!=SIG_IGN || sigismember(&attr->__def, i)) {
+		__libc_sigaction(i, 0, &sa);
+		if (sa.sa_handler!=SIG_DFL && (sa.sa_handler!=SIG_IGN ||
+		    ((attr->__flags & POSIX_SPAWN_SETSIGDEF)
+		     && sigismember(&attr->__def, i) ))) {
 			sa.sa_handler = SIG_DFL;
-			sigaction(i, &sa, 0);
+			__libc_sigaction(i, &sa, 0);
 		}
 	}
 
@@ -47,19 +65,46 @@ int __posix_spawnx(pid_t *res, const char *path,
 		__syscall(SYS_setuid, __syscall(SYS_getuid)) ))
 		_exit(127);
 
+	if (fa && fa->__actions) {
+		struct fdop *op;
+		int ret, fd;
+		for (op = fa->__actions; op->next; op = op->next);
+		for (; op; op = op->prev) {
+			switch(op->cmd) {
+			case FDOP_CLOSE:
+				ret = __syscall(SYS_close, op->fd);
+				break;
+			case FDOP_DUP2:
+				ret = __syscall(SYS_dup2, op->fd, op->newfd)<0;
+				break;
+			case FDOP_OPEN:
+				fd = __syscall(SYS_open, op->path,
+					op->oflag | O_LARGEFILE, op->mode);
+				if (fd == op->fd) {
+					ret = 0;
+				} else {
+					ret = __syscall(SYS_dup2, fd, op->fd)<0;
+					__syscall(SYS_close, fd);
+				}
+				break;
+			}
+			if (ret) _exit(127);
+		}
+	}
+
 	sigprocmask(SIG_SETMASK, (attr->__flags & POSIX_SPAWN_SETSIGMASK)
 		? &attr->__mask : &oldmask, 0);
 
-	if (envp) environ = envp;
-	exec(path, argv);
+	exec(path, argv, envp ? envp : environ);
 	_exit(127);
 
 	return 0;
 }
 
-int posix_spawn(pid_t *res, const char *path,
+int posix_spawn(pid_t *restrict res, const char *restrict path,
 	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, execve, fa, attr, argv, envp);
 }