[Nano-devel] [PATCH 15/17] handle deficient signal systems

[Mike Frysinger]

Pull in the sigaction module from gnulib, and add ifdef checks
for a bunch of signals that don't exist on Windows.
---
 autogen.sh |  1 +
 src/nano.c | 14 ++++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/autogen.sh b/autogen.sh
index b2eecc2c9f75..967251ec3a05 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -13,6 +13,7 @@ modules="
        iswblank
        lstat
        regex
+       sigaction
        snprintf-posix
        stdarg
        strcase
diff --git a/src/nano.c b/src/nano.c
index 72abd7d43004..c6f2cef9ef88 100644
--- a/src/nano.c
+++ b/src/nano.c
@@ -1169,11 +1169,15 @@ void signal_init(void)
     memset(&act, 0, sizeof(struct sigaction));
     act.sa_handler = SIG_IGN;
     sigaction(SIGINT, &act, NULL);
+#ifdef SIGQUIT
     sigaction(SIGQUIT, &act, NULL);
+#endif
 
     /* Trap SIGHUP and SIGTERM because we want to write the file out. */
     act.sa_handler = handle_hupterm;
+#ifdef SIGHUP
     sigaction(SIGHUP, &act, NULL);
+#endif
     sigaction(SIGTERM, &act, NULL);
 
 #ifndef NANO_TINY
@@ -1185,17 +1189,23 @@ void signal_init(void)
     /* Trap normal suspend (^Z) so we can handle it ourselves. */
     if (!ISSET(SUSPEND)) {
        act.sa_handler = SIG_IGN;
+#ifdef SIGTSTP
        sigaction(SIGTSTP, &act, NULL);
+#endif
     } else {
        /* Block all other signals in the suspend and continue handlers.
         * If we don't do this, other stuff interrupts them! */
        sigfillset(&act.sa_mask);
 
        act.sa_handler = do_suspend;
+#ifdef SIGTSTP
        sigaction(SIGTSTP, &act, NULL);
+#endif
 
        act.sa_handler = do_continue;
+#ifdef SIGCONT
        sigaction(SIGCONT, &act, NULL);
+#endif
     }
 }
 
@@ -1227,11 +1237,15 @@ RETSIGTYPE do_suspend(int signal)
     /* Trap SIGHUP and SIGTERM so we can properly deal with them while
      * suspended. */
     act.sa_handler = handle_hupterm;
+#ifdef SIGHUP
     sigaction(SIGHUP, &act, NULL);
+#endif
     sigaction(SIGTERM, &act, NULL);
 
     /* Do what mutt does: send ourselves a SIGSTOP. */
+#ifdef SIGSTOP
     kill(0, SIGSTOP);
+#endif
 }
 
 /* The version of above function that is bound to a key. */
-- 
2.11.1