handle deficient signal systems
Pull in the sigaction module from gnulib, and add ifdef checks
for a bunch of signals that don't exist on Windows.
diff --git a/autogen.sh b/autogen.sh
index de06993..2c75d4b 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -13,6 +13,7 @@
iswblank
lstat
regex
+ sigaction
snprintf-posix
stdarg
strcase
diff --git a/src/nano.c b/src/nano.c
index 015909a..e6c6b61 100644
--- a/src/nano.c
+++ b/src/nano.c
@@ -1173,11 +1173,15 @@
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
@@ -1189,17 +1193,23 @@
/* 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
}
}
@@ -1231,11 +1241,15 @@
/* 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. */