python 对信号 处理的 测试
python 对信号 处理的测试小结下：
每次信号 会将当前执行的函数挂起，进入 信号处理函数
如果信号处理函数还在处理，又来信号，当前函数仍然被挂起
执行完毕回到刚才挂起点继续执行
从下面输出 我们就可以看出来
[*]
^Cget an signal: 2 9
[*]^Cget an signal: 2 10
[*]^Cget an signal: 2 11
[*]^Cget an signal: 2 12
[*]ec 12 t: 12
[*]ec 12 t: 11
[*]ec 12 t: 10
[*]ec 12 t: 9
[*]#coding:utf-8
[*]'''''
[*]python 对linux 中断机制的测试
[*]输出: 按ctrl+c 效果
[*]python test_sig.py
[*]. 0
[*]. 0 . 1
[*]. 1 . 2
[*]. 2 . 3
[*]. 3 . 4
[*]. 4 . 5
[*]. 5 . 6
[*]. 6 . 7
[*]. 7 . 8
[*]. 8 . 9
[*]. 9 . 10
[*]. 10 . 11
[*]. 11 . 12
[*]. 12 . 13
[*]. 13 . 14
[*]. 14 . 15
[*]. 15 . 16
[*]. 16 . 17
[*]. 17 . 18
[*]. 18 . 19
[*]. 19 . 20
[*]. 20 . 21
[*]. 21 . 22
[*]. 22 . 23
[*]. 23 . 24
[*]. 24 . 25
[*]. 25 . 26
[*]^Cget an signal: 2 1
[*]^Cget an signal: 2 2
[*]^Cget an signal: 2 3
[*]^Cget an signal: 2 4
[*]^Cget an signal: 2 5
[*]^Cget an signal: 2 6
[*]^Cget an signal: 2 7
[*]^Cget an signal: 2 8
[*]^Cget an signal: 2 9
[*]^Cget an signal: 2 10
[*]^Cget an signal: 2 11
[*]^Cget an signal: 2 12
[*]ec 12 t: 12
[*]ec 12 t: 11
[*]ec 12 t: 10
[*]ec 12 t: 9
[*]ec 12 t: 8
[*]ec 12 t: 7
[*]ec 12 t: 6
[*]ec 12 t: 5
[*]ec 12 t: 4
[*]ec 12 t: 3
[*]ec 12 t: 2
[*]ec 12 t: 1
[*]. 26 . 27
[*]
[*]main
[*]
[*]'''
[*]import sys
[*]import signal
[*]e={'flag':0,'c':0}
[*]
[*]def handler(signum, frame):
[*] e['c']+=1#计数器
[*] print "get an signal:", signum,e['c']
[*] import time
[*] t=e['c']
[*] time.sleep(2)
[*] print 'ec', e['c'],'t:',t
[*] e['flag']=1
[*]
[*]
[*]#开关
[*]signal.signal(signal.SIGINT, handler)
[*]signal.signal(signal.SIGTERM, handler)
[*]signal.signal(3, handler)
[*]
[*]def main():
[*] while 1:
[*] if e['flag']:break;
[*] for k in range(100):
[*] print '.',k
[*] if e['flag']:break;
[*] for i in range(100000):
[*] if e['flag']:break;
[*] s=i*i
[*] print '.',k,
[*] sys.stdout.flush()
[*]
[*] print 'main'
[*]
[*]
[*]main()
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