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/libsystemd/sd-bus/test-bus-kernel-benchmark.c b/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
index bfeee59d2f..90257d4f3c 100644
--- a/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
+++ b/src/libsystemd/sd-bus/test-bus-kernel-benchmark.c
@@ -270,7 +270,7 @@ int main(int argc, char *argv[]) {
                 CPU_SET(0, &cpuset);
                 pthread_setaffinity_np(pthread_self(), sizeof(cpu_set_t), &cpuset);
 
-                close_nointr_nofail(bus_ref);
+                safe_close(bus_ref);
                 sd_bus_unref(b);
 
                 switch (mode) {