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PID 的代码
updatestate.m
function pid = updateState(pid)
% Update PID state.
if (pid.intOn ~= 0)
pid.I = pid.I + (pid.K*pid.h/pid.Ti)*(pid.e);
end
pid.eold = pid.e;
generated-1
pid = "HelloWorld"
pid < "HelloWorld"
pid "HelloWorld"
pid >= "HelloWorld"
pid like "HelloWorld"
pid in ("HelloWorld","Hello*","Hello*World")
pid in ("Hello*","Hello*World
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)
exi
shell2.c
#include
#include
#include
#include "ourhdr.h"
static void sig_int(int); /* our signal-catching function */
int
main(void)
{
char buf[MAXLINE];
pi
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
setsid.c
/*
* linux/lib/setsid.c
*
* 该程序包括一个setsid()系统调用函数。如果调用的进程不是一个组的领导时,该函数用于
* 创建一个新会话。则调用进程将成为该新会话的领导、新进程组的组领导,并且没有控制终端。
* 调用进程的组id 和会话id 被设置成进程的<mark>PID</mark>(进程标识符)。调用进程将成为新进程组和新会
* 话中的唯一进程。
*/
#in ...
wait.c
/*
* linux/lib/wait.c
*
* (C) 1991 Linus Torvalds
*/
#define __LIBRARY__
#include
#include
_syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
pid_t wait(i
wait.c
/*
* linux/lib/wait.c
*
* (C) 1991 Linus Torvalds
*/
#define __LIBRARY__
#include
#include
_syscall3(pid_t,waitpid,pid_t,pid,int *,wait_stat,int,options)
pid_t wait(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
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