Fix sigchld handling (bug #2245)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@3633 65c4cc65-6c06-0410-ace0-fbb531ad65f3

diff --git a/asterisk.c b/asterisk.c
index 71d1ee4..691a3e4 100755 (executable)
--- a/asterisk.c
+++ b/asterisk.c
@@ -170,6 +170,12 @@ static int fdprint(int fd, const char *s)
        return write(fd, s, strlen(s) + 1);
 }
 
+/* NULL handler so we can collect the child exit status */
+static void null_sig_handler(int signal)
+{
+
+}
+
 int ast_safe_system(const char *s)
 {
        /* XXX This function needs some optimization work XXX */
@@ -178,6 +184,7 @@ int ast_safe_system(const char *s)
        int res;
        struct rusage rusage;
        int status;
+       void (*prev_handler) = signal(SIGCHLD, null_sig_handler);
        pid = fork();
        if (pid == 0) {
                /* Close file descriptors and launch system command */
@@ -204,6 +211,7 @@ int ast_safe_system(const char *s)
                ast_log(LOG_WARNING, "Fork failed: %s\n", strerror(errno));
                res = -1;
        }
+       signal(SIGCHLD, prev_handler);
        return res;
 }