From 2677bc9b8dfba71fa28042d1de05047c2b10d024 Mon Sep 17 00:00:00 2001
From: chyyuu <chyyuu@k750s>
Date: Thu, 17 Oct 2013 09:09:27 +0800
Subject: [PATCH] add lec7-2 fork.c in related_info
---
related_info/lec7-8/Makefile | 6 +++++-
related_info/lec7-8/lec7_2-fork.c | 15 +++++++++++++++
2 files changed, 20 insertions(+), 1 deletion(-)
create mode 100644 related_info/lec7-8/lec7_2-fork.c
diff --git a/related_info/lec7-8/Makefile b/related_info/lec7-8/Makefile
index 149e0bb..1206560 100644
--- a/related_info/lec7-8/Makefile
+++ b/related_info/lec7-8/Makefile
@@ -1,5 +1,9 @@
all: lec7_1.c
@echo "====================================="
+ @echo "compile and analysis lec7_2"
+ @echo "====================================="
+ gcc -g -o lec7_2 lec7_2-fork.c
+ @echo "====================================="
@echo "compile and analysis lec7_1"
@echo "====================================="
gcc -g -o lec7_1 lec7_1.c
@@ -18,4 +22,4 @@ all: lec7_1.c
process_state:
top
clean:
- rm ./lec7_1
+ rm ./lec7_1 ./lec7_2
diff --git a/related_info/lec7-8/lec7_2-fork.c b/related_info/lec7-8/lec7_2-fork.c
new file mode 100644
index 0000000..be62392
--- /dev/null
+++ b/related_info/lec7-8/lec7_2-fork.c
@@ -0,0 +1,15 @@
+#include <stdio.h>
+#include <unistd.h>
+void main(void){
+ int child_status, exec_status;
+ int pid = fork(); //create a child
+ if (pid==0) { // child continues here
+ printf("Child: EXEC lec7_1\n");
+ exec_status=execve("lec7_1",NULL,NULL);
+ printf("Child: Why would I execute?\n");
+ } else { // parent continues here
+ printf("Parent: Whose your daddy?\n");
+ child_status=wait(pid);
+ printf("Parent: the child %d exit with %d\n",pid, child_status);
+ }
+}