diff options
| author | jilles <jilles@FreeBSD.org> | 2012-09-29 11:54:34 +0000 |
|---|---|---|
| committer | jilles <jilles@FreeBSD.org> | 2012-09-29 11:54:34 +0000 |
| commit | fba61ef227067b4f30ac71dee816dd39abee1c8e (patch) | |
| tree | 89610d7c33533a1abd5218d8db331931ee9e6327 /lib/libc/gen/opendir.c | |
| parent | 576f4f1ec84faf13f14984bdf7f8f07357e3ab02 (diff) | |
| download | FreeBSD-src-fba61ef227067b4f30ac71dee816dd39abee1c8e.zip FreeBSD-src-fba61ef227067b4f30ac71dee816dd39abee1c8e.tar.gz | |
libc: Use O_CLOEXEC for various internal file descriptors.
This fixes a race condition where another thread may fork() before CLOEXEC
is set, unintentionally passing the descriptor to the child process.
This commit only adds O_CLOEXEC flags to open() or openat() calls where no
fcntl(fd, F_SETFD, FD_CLOEXEC) follows. The separate fcntl() call still
leaves a race window so it should be fixed later.
Diffstat (limited to 'lib/libc/gen/opendir.c')
| -rw-r--r-- | lib/libc/gen/opendir.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/libc/gen/opendir.c b/lib/libc/gen/opendir.c index 4366399..2d505fc 100644 --- a/lib/libc/gen/opendir.c +++ b/lib/libc/gen/opendir.c @@ -199,7 +199,8 @@ __opendir_common(int fd, const char *name, int flags) * which has also been read -- see fts.c. */ if (flags & DTF_REWIND) { - if ((fd2 = _open(name, O_RDONLY | O_DIRECTORY)) == -1) { + if ((fd2 = _open(name, O_RDONLY | O_DIRECTORY | + O_CLOEXEC)) == -1) { saved_errno = errno; free(buf); free(dirp); |
