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* sysdeps/unix/sysv/linux/shm_open.c (shm_open): Set FD_CLOEXEC
	for descriptor.
This commit is contained in:
Ulrich Drepper 2000-04-12 06:08:31 +00:00
parent a63be9f777
commit fb125e0ced
2 changed files with 27 additions and 1 deletions
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3
ChangeLog
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@ -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.

25
sysdeps/unix/sysv/linux/shm_open.c
View File

@ -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;
}