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PID 的代码
init.c
#include "apue.h"
#include
#include
#include
void
daemonize(const char *cmd)
{
int i, fd0, fd1, fd2;
pid_t pid;
struct rlimit rl;
struct sigaction sa
orphan3.c
#include "apue.h"
#include
static void
sig_hup(int signo)
{
printf("SIGHUP received, pid = %d\n", getpid());
}
static void
pr_ids(char *name)
{
printf("%s: pid = %d, ppid = %d, pgrp = %d
daemoninit.c
#include
#include
#include
#include "ourhdr.h"
int
daemon_init(void)
{
pid_t pid;
if ( (pid = fork()) < 0)
return(-1);
else if (pid != 0)
exit(0); /* pare
shell2.c
#include
#include
#include
#include "ourhdr.h"
static void sig_int(int); /* our signal-catching function */
int
main(void)
{
char buf[MAXLINE];
pid_t pid;
i
daemoninit.c
#include
#include
#include
#include "ourhdr.h"
int
daemon_init(void)
{
pid_t pid;
if ( (pid = fork()) < 0)
return(-1);
else if (pid != 0)
exit(0); /* pare
daemoninit.c
#include
#include
#include
#include "ourhdr.h"
int
daemon_init(void)
{
pid_t pid;
if ( (pid = fork()) < 0)
return(-1);
else if (pid != 0)
exit(0); /* pare
orphan.c
#include
#include
#include
#include
#include "ourhdr.h"
static void sig_hup(int);
static void pr_ids(char *);
int
main(void)
{
char c;
pid_t pid;
pr_
chap2_7f.m
%PID Controler Based on Ziegler-Nichols
clear all;
close all;
sys=tf(400,[1,30,200,0]);
figure(1);
rlocus(sys);
[km,pole]=rlocfind(sys)
wm=imag(pole(2));
kp=0.6*km
kd=kp*pi/(4*wm)
ki=k
daemonize.c
#include "apue.h"
#include
#include
#ifdef BSD
#include
#endif
#include
void
daemonize(const char *cmd)
{
int i, fd0, fd1, fd2;
pid_t pid;
struct