From d8c0a8d1a1890ee23df43e8dfdbc294bb441d691 Mon Sep 17 00:00:00 2001
From: pthzwps2n <1572003858@qq.com>
Date: Sat, 25 Jun 2022 12:27:15 +0800
Subject: [PATCH] =?UTF-8?q?=E5=8F=82=E8=80=83http://t.csdn.cn/P76CZ?=
 =?UTF-8?q?=E5=AE=9E=E7=8E=B0sleep=EF=BC=8Cgdb=E6=97=B6=E5=8F=91=E7=8E=B0?=
 =?UTF-8?q?=E4=B8=8D=E8=83=BD=E8=B0=83=E7=94=A8sys=5Fsleep?=
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---
 sleep.c | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 sleep.c

diff --git a/sleep.c b/sleep.c
new file mode 100644
index 0000000..e60c38a
--- /dev/null
+++ b/sleep.c
@@ -0,0 +1,30 @@
+#include<stdio.h>
+#include<signal.h>
+#include<unistd.h>
+void sigAlrm(int signal)
+{}
+
+unsigned int mysleep(unsigned int second)
+{
+    struct sigaction sig,osig;
+    sig.sa_handler = sigAlrm;
+    sigemptyset(&sig.sa_mask);
+    sig.sa_flags = 0;
+
+    sigaction(SIGALRM,&sig,&osig);
+    alarm(second);
+    pause();
+    unsigned int ret = alarm(0);
+    sigaction(SIGALRM,&sig,NULL);
+    return ret;
+}
+
+int main()
+{
+    while(1)
+    {
+        mysleep(2);
+        printf("sleep 2 second\n");
+    }
+    return 0;
+}