唤醒进程

UNIX下唤醒进程

在Solaris下面做的实验

man kill
man ps
man signal.h


方便起见，先alias一下ps，让它显示进程号，父进程号，进程状态，TTY，CPU时间，进程参数

bash-3.2$ alias ckps="ps -o pid,ppid,s,tty,time,args"

拿same-gnome做实验

bash-3.2$ same-gnome

^Z

[2]+ Stopped same-gnome

看一下当前进程状态

bash-3.2$ ckps

PID   PPID  S TT    TIME  COMMAND

12399 6868  S pts/7 00:00 bash

12591 12399 T pts/7 00:01 same-gnome

12592 12591 T pts/7 00:00 same-gnome

12594 12399 O pts/7 00:00 ps -o pid,ppid,s,tty,time,args

ckps的结果显示，same-gnome（Pid：12591，12592）处于T(Terminated)状态。

用25号信号唤醒same-gnome （man signal.h）

bash-3.2$ kill -25 12591 12592

再ckps一下

bash-3.2$ ckps

PID   PPID  S TT    TIME  COMMAND

12399 6868  S pts/7 00:00 bash

12596 12399 O pts/7 00:00 ps -o pid,ppid,s,tty,time,args

12591 12399 S pts/7 00:01 same-gnome

12592 12591 S pts/7 00:00 same-gnome

same-gnome的状态变成S（Sleeping）了，又可以玩老。

AIX用户进程状态

用户进程	描述
O	Nonexist
A	Active
W	Swapped
I	Idle(Waiting for startup)
Z	Canceled
T	Stopped

Solaris用户进程状态

    O    Process is running on a processor.

    S    Sleeping: process is waiting for an event
         to complete.

    R    Runnable: process is on run queue.

    T    Process is stopped, either by a job  con-
         trol   signal  or  because  it  is  being
         traced.

    W    Waiting: process is waiting for CPU usage
         to drop to the CPU-caps enforced limits.

    Z    Zombie  state:  process  terminated   and
         parent not waiting.