From 82bd40bc2b2d024ab7be0f27eea3f871f99cc213 Mon Sep 17 00:00:00 2001
From: wangzhengquan <wangzhengquan85@126.com>
Date: 星期三, 21 十月 2020 16:55:30 +0800
Subject: [PATCH] update
---
test/test.c | 48 ++++++++++++++++++++++++++++++++++++------------
1 files changed, 36 insertions(+), 12 deletions(-)
diff --git a/test/test.c b/test/test.c
index 1e27d2f..ab21287 100644
--- a/test/test.c
+++ b/test/test.c
@@ -1,15 +1,39 @@
#include "usg_common.h"
-
-int test() {
- static int count = 0;
- count++;
- return count;
+static void sig_quit(int);
+int
+main(void)
+{
+ sigset_t
+ newmask, oldmask, pendmask;
+ if (signal(SIGQUIT, sig_quit) == SIG_ERR)
+ err_exit(errno, "can鈥檛 catch SIGQUIT");
+ /*
+ * Block SIGQUIT and save current signal mask.
+ */
+ sigemptyset(&newmask);
+ sigaddset(&newmask, SIGQUIT);
+ if (sigprocmask(SIG_BLOCK, &newmask, &oldmask) < 0)
+ err_exit(errno, "SIG_BLOCK error");
+ sleep(5);
+ /* SIGQUIT here will remain pending */
+ if (sigpending(&pendmask) < 0)
+ err_exit(errno, "sigpending error");
+ if (sigismember(&pendmask, SIGQUIT))
+ printf("\nSIGQUIT pending\n");
+ /*
+ * Restore signal mask which unblocks SIGQUIT.
+ */
+ if (sigprocmask(SIG_SETMASK, &oldmask, NULL) < 0)
+ err_exit(errno, "SIG_SETMASK error");
+ printf("SIGQUIT unblocked\n");
+ sleep(5);
+ exit(0);
+ /* SIGQUIT here will terminate with core file */
}
-
-int main() {
- char host[128];
- const char * src = "192.168.20.21";
- memcpy( host, src, sizeof(host));
- printf("%s\n", host);
-}
\ No newline at end of file
+static void sig_quit(int signo)
+{
+ printf("caught SIGQUIT\n");
+ if (signal(SIGQUIT, SIG_DFL) == SIG_ERR)
+ err_exit(errno, "can鈥檛 reset SIGQUIT");
+}
--
Gitblit v1.8.0