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/core/main.c b/src/core/main.c
index cc876efa9c..e0fbb6e147 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -240,7 +240,7 @@ static int console_setup(bool do_reset) {
         if (r < 0)
                 log_error("Failed to reset /dev/console: %s", strerror(-r));
 
-        close_nointr_nofail(tty_fd);
+        safe_close(tty_fd);
         return r;
 }