util: replace close_nointr_nofail() by a more useful safe_close()

safe_close() automatically becomes a NOP when a negative fd is passed,
and returns -1 unconditionally. This makes it easy to write lines like
this:

        fd = safe_close(fd);

Which will close an fd if it is open, and reset the fd variable
correctly.

By making use of this new scheme we can drop a > 200 lines of code that
was required to test for non-negative fds or to reset the closed fd
variable afterwards.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/login/pam-module.c b/src/login/pam-module.c
index 195d4d574e..9873dd547a 100644
--- a/src/login/pam-module.c
+++ b/src/login/pam-module.c
@@ -484,7 +484,7 @@ _public_ PAM_EXTERN int pam_sm_open_session(
                 r = pam_set_data(handle, "systemd.session-fd", INT_TO_PTR(session_fd+1), NULL);
                 if (r != PAM_SUCCESS) {
                         pam_syslog(handle, LOG_ERR, "Failed to install session fd.");
-                        close_nointr_nofail(session_fd);
+                        safe_close(session_fd);
                         return r;
                 }
         }