diff options
| -rw-r--r-- | ChangeLog | 3 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/shm_open.c | 25 |
2 files changed, 27 insertions, 1 deletions
diff --git a/ChangeLog b/ChangeLog index fcecf3613f..61e7fd5b58 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,5 +1,8 @@ 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. diff --git a/sysdeps/unix/sysv/linux/shm_open.c b/sysdeps/unix/sysv/linux/shm_open.c index 08bdaeadbd..ca24424b78 100644 --- a/sysdeps/unix/sysv/linux/shm_open.c +++ b/sysdeps/unix/sysv/linux/shm_open.c @@ -121,6 +121,7 @@ shm_open (const char *name, int oflag, mode_t mode) { size_t namelen; char *fname; + int fd; /* Determine where the shmfs is mounted. */ __libc_once (once, where_is_shmfs); @@ -153,7 +154,29 @@ shm_open (const char *name, int oflag, mode_t mode) 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; } |