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操作系统Interprocess Communication（IPC）实验源码。 在Unix的内核环境中

compile:
	gcc -o pipe pipe.c
	gcc -o popen popen.c
run:
	./pipe
	./popen
output:
/* pipe */
In father process
In child process
Read String:Hello World
/* popen */
total 34
-rwxr-xr-x    1 root     root        14643 Apr 23 11:47 pipe
-rw-r--r--    1 root     root          813 Apr 14 11:51 pipe.c
-rwxr-xr-x    1 root     root        14132 Apr 14 11:48 popen
-rw-r--r--    1 root     root          347 Apr 14 11:48 popen.c
-rw-r--r--    1 root     root           59 Apr 23 11:48 readme