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Description: 1、 了解系统调用fork()、execl()、exit()、getpid()和waitpid()的功能和实现过程
2、 编写一段程序实现以下功能：
a) 使用系统调用fork()创建两个子进程
b) 父进程重复显示字符串”parent:”，并使用函数getpid()显示自己的进程ID。
c) 两个子进程分别重复显示字符串”child:”，并使用函数getpid()显示自己的进程ID
3、 编写一段程序实现以下功能：
a) 使用系统调用fork()创建一个子进程
b) 子进程显示自己的进程ID和字符串": The child is calling an exec.\n"，然后通过execl()调用系统命令ps显示当前运行的进程情况，从而更换自己的执行代码，最后调用exit()结束。
c) 父进程显示自己的进程ID和字符串” ": The parent is waiting for child to exit.\n "，然后调用waitpid()等待子进程结束，并在子进程结束后显示”The parent exit.\n
-1, the understanding of the system call fork (), execl (), exit (), getpid (), and waitpid () function and process 2, write a procedure to achieve the following functions : a) The use of system calls fork () to create two child process b) the parent process repeated string "parent : ", and the use of function getpid () show their ID process. C) two separate child process repeated string "child :" and the use of function getpid () show their ID 3 process, to prepare a process to achieve the following functions : a) The use of system calls fork () to create a child process b) children show their ID process, and the string " : The child is calling an exec. \ n " Then execl () call system commands ps shows currently running process, thereby replacing the execution
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Description: linux父子进程间关系，进程的创建和销毁，主要利用fork调用来实现-linux process of the relationship between father and son, the process of creation and destruction, the main use of fork calls to achieve
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Size: 1024 |
Author: signal |
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Description: 进程控制，linux编程，系统调用，fork（）、exec（）、exit（）、waitpid（）函数的功能以及实现过程，1创建两个子进程，重复显示代码2调用exec（）更换自己的代码。计算机操作系统第三版实验二-process control :fork()exec()waitpid()exit().show some words constantly both in the parent s and children process
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Size: 1024 |
Author: 柳佳林 |
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