Use O_CLOEXEC in sysconf [BZ #26791]

If sysconf is used in multithreaded processes, various filedescriptors
may leak due to missing O_CLOEXEC.  This commit adds the flag.

diff --git a/sysdeps/unix/sysv/linux/sysconf.c b/sysdeps/unix/sysv/linux/sysconf.c
index 7958a74164e9214ead93aac0d9cc58c762a48c6d..9c5a4cb1a4d0e022493d35b119ec197a8f2b60ae 100644 (file)
--- a/sysdeps/unix/sysv/linux/sysconf.c
+++ b/sysdeps/unix/sysv/linux/sysconf.c
@@ -81,7 +81,7 @@ __sysconf (int name)
 
   if (procfname != NULL)
     {
-      int fd = __open_nocancel (procfname, O_RDONLY);
+      int fd = __open_nocancel (procfname, O_RDONLY | O_CLOEXEC);
       if (fd != -1)
        {
          /* This is more than enough, the file contains a single integer.  */