Author: ghelmer
Date: Wed Jan 11 16:35:26 2012
New Revision: 229966
URL: http://svn.freebsd.org/changeset/base/229966
Log:
jilles pointed out that O_CLOEXEC could be used in the open(2) flags
rather than using fcntl(2) later, and in addition to saving a system
call, removes a possible race with fork/exec from threads or signal
handlers.
Modified:
head/lib/libutil/pidfile.c
Modified: head/lib/libutil/pidfile.c
==============================================================================
--- head/lib/libutil/pidfile.c Wed Jan 11 15:00:16 2012 (r229965)
+++ head/lib/libutil/pidfile.c Wed Jan 11 16:35:26 2012 (r229966)
@@ -117,7 +117,7 @@ pidfile_open(const char *path, mode_t mo
* pidfile_write() can be called multiple times.
*/
fd = flopen(pfh->pf_path,
- O_WRONLY | O_CREAT | O_TRUNC | O_NONBLOCK, mode);
+ O_WRONLY | O_CREAT | O_TRUNC | O_CLOEXEC | O_NONBLOCK, mode);
if (fd == -1) {
if (errno == EWOULDBLOCK && pidptr != NULL) {
count = 20;
@@ -139,19 +139,6 @@ pidfile_open(const char *path, mode_t mo
}
/*
- * Prevent the file descriptor from escaping to other
- * programs via exec(3).
- */
- if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1) {
- error = errno;
- unlink(pfh->pf_path);
- close(fd);
- free(pfh);
- errno = error;
- return (NULL);
- }
-
- /*
* Remember file information, so in pidfile_write() we are sure we write
* to the proper descriptor.
*/
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