Preserve errno across signals.

2022-02-24 05:06:12 -05:00
parent a9874d4959
commit 286b86d62c
2 changed files with 7 additions and 6 deletions
--- a/ndhc.c
+++ b/ndhc.c
@ -149,6 +149,7 @@ void show_usage(void)

 static void signal_handler(int signo)
 {
+    int serrno = errno;
    switch (signo) {
    case SIGCHLD: {
        static const char errstr[] = "ndhc-master: Subprocess terminated unexpectedly. Exiting.\n";
@ -161,6 +162,7 @@ static void signal_handler(int signo)
    case SIGUSR2: l_signal_release = 1; break;
    default: break;
    }
+    errno = serrno;
 }

 void signal_exit(int status)