在根据文档的Windows中的python 2.7中,您可以发送CTRL_C_EVENT
(Python 2.7 Subprocess Popen.send_signal documentation).
但是,当我尝试它时,我没有在子进程中收到预期的键盘中断.
(Python 2.7 Subprocess Popen.send_signal documentation).
但是,当我尝试它时,我没有在子进程中收到预期的键盘中断.
这是父进程的示例代码：
# FILE : parentProcess.py
import subprocess
import time
import signal
CREATE_NEW_PROCESS_GROUP = 512
process = subprocess.Popen(['python','-u','childProcess.py'],stdin=subprocess.PIPE,stdout=subprocess.PIPE,stderr=subprocess.STDOUT,universal_newlines=True,creationflags=CREATE_NEW_PROCESS_GROUP)
print "pid = ",process.pid
index = 0
maxLoops = 15
while index < maxLoops:
index += 1
# Send one message every 0.5 seconds
time.sleep(0.5)
# Send data to the subprocess
process.stdin.write('Bar\n')
# Read data from the subprocess
temp = process.stdout.readline()
print temp,if (index == 10):
# Send Keyboard Interrupt
process.send_signal(signal.CTRL_C_EVENT)
这是子程序的示例代码：
# FILE : childProcess.py
import sys
while True:
try:
# Get data from main process
temp = sys.stdin.readline()
# Write data out
print 'Foo ' + temp,except KeyboardInterrupt:
print "KeyboardInterrupt"
如果我运行文件parentProcess.py我希望得到“Foo Bar”十次,然后是“KeyboardInterrupt”,接着是“Foo Bar”4次,但我得到“Foo Bar”15次.
有没有办法让CTRL_C_EVENT表现为键盘中断,就像SIGINT在Linux中的表现一样？
做了一些阅读后,我发现一些信息似乎与关于CTRL_C_EVENT的python文档相矛盾,特别是它说
CTRL_C_EVENT
0 Generates a CTRL+C signal. This signal cannot be generated for process groups
以下站点提供了有关创建标志的更多信息：
Process Creation Flags.
这个子进程信号处理方法在Linux和Windows 2008上都适用于我,它们都使用Python 2.7.2,但它使用Ctrl-Break而不是Ctrl-C.请参阅
http://msdn.microsoft.com/en-us/library/ms683155%28v=vs.85%29.aspx中有关进程组和Ctrl-C的说明.
catcher.py：
import os
import signal
import sys
import time
def signal_handler(signal,frame):
print 'catcher: signal %d received!' % signal
raise Exception('catcher: i am done')
if hasattr(os.sys,'winver'):
signal.signal(signal.SIGBREAK,signal_handler)
else:
signal.signal(signal.SIGTERM,signal_handler)
print 'catcher: started'
try:
while(True):
print 'catcher: sleeping...'
time.sleep(1)
except Exception as ex:
print ex
sys.exit(0)
thrower.py：
import signal
import subprocess
import time
import os
args = [
'python','catcher.py',]
print 'thrower: starting catcher'
if hasattr(os.sys,'winver'):
process = subprocess.Popen(args,creationflags=subprocess.CREATE_NEW_PROCESS_GROUP)
else:
process = subprocess.Popen(args)
print 'thrower: waiting a couple of seconds for catcher to start...'
time.sleep(2)
print 'thrower: sending signal to catch'
if hasattr(os.sys,'winver'):
os.kill(process.pid,signal.CTRL_BREAK_EVENT)
else:
process.send_signal(signal.SIGTERM)
print 'thrower: i am done'
