Set cloexec flag for log files

https://fedorahosted.org/sssd/ticket/1708

The services kept the fd to /var/log/sssd/sssd.log open. I don't think
there's any point in keeping the logfiles open after exec-ing for the
child, so I set the CLOEXEC flag.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/util/debug.c b/src/util/debug.c
index e57656d7f..a027e701b 100644
--- a/src/util/debug.c
+++ b/src/util/debug.c
@@ -24,6 +24,7 @@
 #include <stdio.h>
 #include <stdarg.h>
 #include <stdlib.h>
+#include <fcntl.h>
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -179,6 +180,8 @@ int open_debug_file_ex(const char *filename, FILE **filep)
     const char *log_file;
     mode_t old_umask;
     int ret;
+    int debug_fd;
+    int flags;
 
     if (filename == NULL) {
         log_file = debug_log_file;
@@ -204,6 +207,14 @@ int open_debug_file_ex(const char *filename, FILE **filep)
     }
     umask(old_umask);
 
+    debug_fd = fileno(f);
+    if (debug_fd == -1) {
+        return EIO;
+    }
+
+    flags = fcntl(debug_fd, F_GETFD, 0);
+    (void) fcntl(debug_fd, F_SETFD, flags | FD_CLOEXEC);
+
     if (filep == NULL) {
         debug_file = f;
     } else {