2000-04-11 Ulrich Drepper <drepper@redhat.com>
+ * sysdeps/unix/sysv/linux/shm_open.c (shm_open): Set FD_CLOEXEC
+ for descriptor.
+
* misc/sys/mman.h: Add prototypes for shm_open and shm_unlink.
* rt/Makefile (librt-routines): Add shm_open and shm_unlink.
* rt/Versions [librt] (GLIBC_2.2): Add shm_open and shm_unlink.
{
size_t namelen;
char *fname;
+ int fd;
/* Determine where the shmfs is mounted. */
__libc_once (once, where_is_shmfs);
file on the shmfs. If this is what should be done the whole function
should be revamped since we can determine whether shmfs is available
while trying to open the file, all in one turn. */
- return open (fname, oflag, mode);
+ fd = open (fname, oflag, mode);
+ if (fd != -1)
+ {
+ /* We got a descriptor. Now set the FD_CLOEXEC bit. */
+ int flags = fcntl (fd, F_GETFD, 0);
+
+ if (__builtin_expect (flags, 0) >= 0)
+ {
+ flags |= FD_CLOEXEC;
+ flags = fcntl (fd, F_SETFD, flags);
+ }
+
+ if (flags == -1)
+ {
+ /* Something went wrong. We cannot return the descriptor. */
+ int save_errno = errno;
+ close (fd);
+ fd = -1;
+ __set_errno (save_errno);
+ }
+ }
+
+ return fd;
}