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authorMichael K. Johnson <johnsonm@redhat.com>1999-12-06 16:59:19 +0000
committerMichael K. Johnson <johnsonm@redhat.com>1999-12-06 16:59:19 +0000
commite4cbbdca8761ce2467c0bb171e2fc695e2842be5 (patch)
treefd34c4774e44e2c214785718bbbe3316f8abca4e /src/ppp-watch.c
parent89dca649785a919576aa4b830969bba63ee89139 (diff)
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handle control-C and such on parent right
use sigaction
Diffstat (limited to 'src/ppp-watch.c')
-rw-r--r--src/ppp-watch.c43
1 files changed, 36 insertions, 7 deletions
diff --git a/src/ppp-watch.c b/src/ppp-watch.c
index 5092c812..66bb03dc 100644
--- a/src/ppp-watch.c
+++ b/src/ppp-watch.c
@@ -32,7 +32,7 @@
* else:
* while (1):
* sigsuspend()
- * if SIGTERM:
+ * if SIGTERM or SIGINT:
* kill pppd pgrp
* exit
* if SIGHUP:
@@ -85,6 +85,7 @@ static int theSigio = 0;
static int theSigchld = 0;
static int theSigalrm = 0;
+static int theChild;
static void
@@ -92,6 +93,25 @@ cleanExit(int exitCode);
+static void
+forward_signal(int signo) {
+ kill(theChild, SIGINT);
+}
+
+
+
+
+static void
+set_signal(int signo, void (*handler)(int)) {
+ struct sigaction act;
+
+ act.sa_handler = handler;
+ act.flags = SA_RESTART;
+ sigemptyset(&act.sa_mask);
+ sigaction(signo, &act, NULL);
+}
+
+
static void
detach(int now, int parentExitCode, char *device) {
@@ -115,6 +135,15 @@ detach(int now, int parentExitCode, char *device) {
if (child) {
/* parent process */
close (pipeArray[1]);
+
+ /* forward likely signals to the main process; we will
+ * react later
+ */
+ theChild = child
+ set_signal(SIGINT, forward_signal);
+ set_signal(SIGTERM, forward_signal);
+ set_signal(SIGHUP, forward_signal);
+
while (read (pipeArray[0], &exitCode, 1) < 0) {
switch (errno) {
case EINTR: continue;
@@ -443,13 +472,13 @@ main(int argc, char **argv) {
doPidFile(real_device);
- signal(SIGTERM, signal_handler);
- signal(SIGINT, signal_handler);
- signal(SIGHUP, signal_handler);
- signal(SIGIO, signal_handler);
- signal(SIGCHLD, signal_handler);
+ set_signal(SIGTERM, signal_handler);
+ set_signal(SIGINT, signal_handler);
+ set_signal(SIGHUP, signal_handler);
+ set_signal(SIGIO, signal_handler);
+ set_signal(SIGCHLD, signal_handler);
if (theBoot) {
- signal(SIGALRM, signal_handler);
+ set_signal(SIGALRM, signal_handler);
alarm(30);
}