Allow sigaction() to be used even if sigprocmask() isn't around

[rsync/rsync.git] / main.c

diff --git a/main.c b/main.c
index b4516e2..f60d4ae 100644 (file)
--- a/main.c
+++ b/main.c
@@ -68,6 +68,15 @@ struct file_list *the_file_list;
  * but set it higher, just in case. */
 #define MAXCHILDPROCS 7
 
+#ifdef HAVE_SIGACTION
+# ifdef HAVE_SIGPROCMASK
+#  define SIGACTMASK(n,h) SIGACTION(n,h), sigaddset(&sigmask,(n))
+# else
+#  define SIGACTMASK(n,h) SIGACTION(n,h)
+# endif
+static struct sigaction sigact;
+#endif
+
 struct pid_status {
        pid_t pid;
        int status;
@@ -1099,7 +1108,9 @@ static RETSIGTYPE sigchld_handler(UNUSED(int val))
                }
        }
 #endif
+#ifndef HAVE_SIGACTION
        signal(SIGCHLD, sigchld_handler);
+#endif
 }
 
 
@@ -1159,16 +1170,23 @@ int main(int argc,char *argv[])
        int ret;
        int orig_argc = argc;
        char **orig_argv = argv;
+#ifdef HAVE_SIGACTION
+# ifdef HAVE_SIGPROCMASK
+       sigset_t sigmask;
 
-       signal(SIGUSR1, sigusr1_handler);
-       signal(SIGUSR2, sigusr2_handler);
-       signal(SIGCHLD, sigchld_handler);
+       sigemptyset(&sigmask);
+# endif
+       sigact.sa_flags = SA_NOCLDSTOP;
+#endif
+       SIGACTMASK(SIGUSR1, sigusr1_handler);
+       SIGACTMASK(SIGUSR2, sigusr2_handler);
+       SIGACTMASK(SIGCHLD, sigchld_handler);
 #ifdef MAINTAINER_MODE
-       signal(SIGSEGV, rsync_panic_handler);
-       signal(SIGFPE, rsync_panic_handler);
-       signal(SIGABRT, rsync_panic_handler);
-       signal(SIGBUS, rsync_panic_handler);
-#endif /* def MAINTAINER_MODE */
+       SIGACTMASK(SIGSEGV, rsync_panic_handler);
+       SIGACTMASK(SIGFPE, rsync_panic_handler);
+       SIGACTMASK(SIGABRT, rsync_panic_handler);
+       SIGACTMASK(SIGBUS, rsync_panic_handler);
+#endif
 
        starttime = time(NULL);
        am_root = (MY_UID() == 0);
@@ -1195,13 +1213,16 @@ int main(int argc,char *argv[])
                exit_cleanup(RERR_SYNTAX);
        }
 
-       signal(SIGINT,SIGNAL_CAST sig_int);
-       signal(SIGHUP,SIGNAL_CAST sig_int);
-       signal(SIGTERM,SIGNAL_CAST sig_int);
+       SIGACTMASK(SIGINT, sig_int);
+       SIGACTMASK(SIGHUP, sig_int);
+       SIGACTMASK(SIGTERM, sig_int);
+#if defined HAVE_SIGACTION && HAVE_SIGPROCMASK
+       sigprocmask(SIG_UNBLOCK, &sigmask, NULL);
+#endif
 
        /* Ignore SIGPIPE; we consistently check error codes and will
         * see the EPIPE. */
-       signal(SIGPIPE, SIG_IGN);
+       SIGACTION(SIGPIPE, SIG_IGN);
 
        /* Initialize push_dir here because on some old systems getcwd
         * (implemented by forking "pwd" and reading its output) doesn't