su: preserve errno in cleanup_pam()

Signed-off-by: Ludwig Nussel <ludwig.nussel@suse.de>

diff --git a/login-utils/su.c b/login-utils/su.c
index 944d6558e8a24bdbed22c5bed1bfade13876290f..0f535b9b728cfb3d3327f89756842b6b654f24ed 100644 (file)
--- a/login-utils/su.c
+++ b/login-utils/su.c
@@ -153,6 +153,8 @@ static struct pam_conv conv =
 static void
 cleanup_pam (int retcode)
 {
+  int saved_errno = errno;
+
   if (_pam_session_opened)
     pam_close_session (pamh, 0);
 
@@ -160,6 +162,8 @@ cleanup_pam (int retcode)
     pam_setcred (pamh, PAM_DELETE_CRED | PAM_SILENT);
 
   pam_end(pamh, retcode);
+
+  errno = saved_errno;
 }
 
 /* Signal handler for parent process.  */