Within a python script I need to launch a command such as
kill $(ps aux | grep httpd | awk '{print $2}')
Using subprocess I have tried to split the command using a function from https://stackoverflow.com/a/29755431/1355628)
The function is fine with simple commands with pipe but unfortunately with the one above it does not seem to work (the return code seems to be completely random...)
Thanks is advance
subprocess.run takes an optional shell=True argument, which will run your command in a subshell.
Please do read the Security Considerations however, if you're handling user input.
Another (better, imo) solution, would be to use the psutil package and os.kill, like this:
import psutil
processes = [p for p in psutil.pids() if 'httpd' in psutil.Process(p).name()]
for process in processes:
os.kill(...)
cmd = "kill $(ps aux | grep proces[s] | awk '{print $2}');rm -f /var/lock/process && service process start" pop = subprocess.Popen(cmd, stderr=subprocess.STDOUT, stdout=subprocess.PIPE, shell=True) pop.wait() print "return code is : %d" % pop.returncode Executing the command in a bash is fine, but within python it results in a failure : "return code is -15" (instead of 0)