From 81f70e003a04a0a57f119e8837a691312f2a3133 Mon Sep 17 00:00:00 2001
From: gaoyang3513 <gaoyang3513@163.com>
Date: Tue, 11 Jul 2023 20:28:43 +0800
Subject: [PATCH] =?UTF-8?q?[=E4=BF=AE=E6=94=B9]=20=E6=B5=8B=E8=AF=95?=
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---
 ReadMe.md  |  4 +++-
 test_sem.c | 21 +++++++++++----------
 2 files changed, 14 insertions(+), 11 deletions(-)

diff --git a/ReadMe.md b/ReadMe.md
index 051d185..8202f99 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -6,4 +6,6 @@
 ```shell
 # Top 
 cmake -S . -B output -G "Unix Makefiles"
-```
\ No newline at end of file
+
+make -C output
+```
diff --git a/test_sem.c b/test_sem.c
index 51c5df3..b6e71c3 100644
--- a/test_sem.c
+++ b/test_sem.c
@@ -12,10 +12,10 @@
 
 int main(){
 	int pid1,pid2;
-	sem_t *resource1; 
-	sem_t *resource2; 
+	sem_t *resource1;
+	sem_t *resource2;
 	char inpipe[200],outpipe1[100],outpipe2[100];
-	int fd[2];				//0为读出段,1为写入端    
+	int fd[2];				//0为读出段,1为写入端
 	pipe(fd);				//建立一个无名管道
 
 	pid1 = fork();
@@ -32,11 +32,12 @@ int main(){
 		sprintf(outpipe1,"Child process 1 is sending a message!\n");
 		write(fd[1],outpipe1, strlen(outpipe1));
 		lockf(fd[1],0,0);	// 管道解锁
-		sem_post(resource1);			// 信号量开锁，name_sem1
-		sem_close(resource1);								// 有名信号量关闭，name_sem1
-		exit(0);			// 线程退出
+		sem_post(resource1);		// 信号量开锁，name_sem1
+		sem_close(resource1);					// 有名信号量关闭，name_sem1
+
+		exit(0);		// 线程退出
 	}
-	
+
 	pid2 = fork();
 	if(pid2<0){
 		printf("error in the second fork!\n");
@@ -48,11 +49,11 @@ int main(){
 		sem_wait(resource1);
 		printf("Pid of PID[2]: %u\n", getpid());
 		close(fd[0]);
-		lockf(fd[1],1,0);	
+		lockf(fd[1],1,0);
 		sprintf(outpipe2,"Child process 2 is sending a message!\n");
 		write(fd[1],outpipe2, strlen(outpipe2));
-		lockf(fd[1],0,0);		
-		sem_post(resource2);	
+		lockf(fd[1],0,0);
+		sem_post(resource2);
 
 		sem_close(resource1);
 		sem_close(resource2);