#include <fcntl.h>
#include <sys/wait.h>
#include "syscall.h"
+#include "lock.h"
#include "pthread_impl.h"
#include "fdop.h"
int ec=0, cs;
struct args args;
- if (pipe2(args.p, O_CLOEXEC))
- return errno;
-
pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
args.path = path;
args.envp = envp;
pthread_sigmask(SIG_BLOCK, SIGALL_SET, &args.oldmask);
+ /* The lock guards both against seeing a SIGABRT disposition change
+ * by abort and against leaking the pipe fd to fork-without-exec. */
+ LOCK(__abort_lock);
+
+ if (pipe2(args.p, O_CLOEXEC)) {
+ UNLOCK(__abort_lock);
+ ec = errno;
+ goto fail;
+ }
+
pid = __clone(child, stack+sizeof stack,
CLONE_VM|CLONE_VFORK|SIGCHLD, &args);
close(args.p[1]);
+ UNLOCK(__abort_lock);
if (pid > 0) {
if (read(args.p[0], &ec, sizeof ec) != sizeof ec) ec = 0;
if (!ec && res) *res = pid;
+fail:
pthread_sigmask(SIG_SETMASK, &args.oldmask, 0);
pthread_setcancelstate(cs, 0);