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PID 的代码
exec2.c
#include "apue.h"
#include
int
main(void)
{
pid_t pid;
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid == 0) { /* child */
if (execl("/home/sar/bin/testinterp",
wait1.c
#include "apue.h"
#include
int
main(void)
{
pid_t pid;
int status;
if ((pid = fork()) < 0)
err_sys("fork error");
else if (pid == 0) /* child */
exit(7);
if (wait(&status)
fig8.20
#include "apue.h"
#include
int
main(void)
{
pid_t pid;
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid == 0) { /* child */
if (execl("/home/sar/bin/testinterp",
fig8.6
#include "apue.h"
#include
int
main(void)
{
pid_t pid;
int status;
if ((pid = fork()) < 0)
err_sys("fork error");
else if (pid == 0) /* child */
exit(7);
if (wait(&status)
fig8.16
#include "apue.h"
#include
char *env_init[] = { "USER=unknown", "PATH=/tmp", NULL };
int
main(void)
{
pid_t pid;
if ((pid = fork()) < 0) {
err_sys("fork error");
} else if (pid ==
homeworkb3time1.c
#include
#include
main()
kill.c
#include
#include
#include
#include
#include
#include
#include
int sys_pause(void);
int sys_close(int
wait1.c
#include
#include
#include "ourhdr.h"
int
main(void)
{
pid_t pid;
int status;
if ( (pid = fork()) < 0)
err_sys("fork error");
else if (pid == 0) /* child */
exit
qappexec.cpp
/***************************************************************************
* Copyright (C) 2007 by Motorola Commnunity around the World *
* lahu3672@googlemail.com
sys.c
/*
* linux/kernel/sys.c
*
* (C) 1991 Linus Torvalds
*/
#include // 错误号头文件。包含系统中各种出错号。(Linus 从minix 中引进的)。
#include // 调度程序头文件，定义了任务结构task_struct、初始任务0 的数据，
// 还有一些有关描述符参数设