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PID 的代码
exec1.c
#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 ==
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 ==
exec1.c
#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 ==
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",