ongrep

commit 1ae9f4971084cdcab7561da21d70ff8f6198eb7e
parent d1f4d3521898f1204da517e2801fcdfdd13f59c6
Author: Jordan Ritter <jpr5@darkridge.com>
Date:   Mon, 11 Sep 2006 09:08:03 +0000

make impractical a race condition bug whereby double-frees can occur
by multiple (trapped) signals delivered to ngrep before exit().  set
all trapped signals to SIG_IGN immediately upon signal entry.  seems
to be happening more frequently in the last year.

Diffstat:
M
ngrep.c
 | 
8
++++++++

1 file changed, 8 insertions(+), 0 deletions(-)
diff --git a/ngrep.c b/ngrep.c
@@ -1246,6 +1246,14 @@ void version(void) {
 void clean_exit(int32_t sig) {
     struct pcap_stat s;
 
+    signal(SIGINT,   SIG_IGN);
+    signal(SIGABRT,  SIG_IGN);
+#if !defined(_WIN32)
+    signal(SIGQUIT,  SIG_IGN);
+    signal(SIGPIPE,  SIG_IGN);
+    signal(SIGWINCH, SIG_IGN);
+#endif
+
     if (quiet < 1 && sig >= 0)
         printf("exit\n");