I'm using Node.js v0.10.31 on Windows 8.1 x64. I noticed that for a process (a node.js or python script) that handles the SIGINT handler, the handler is not called when the signal is sent from another node.js process by process.kill(PID, "SIGINT"), and thus causing it to terminate. However I indeed verified that the handlers are called if the SIGINT is sent by pressing CTRL-C in console.
Here's the Node.js script that handles SIGINT (CoffeeScript):
process.on 'SIGINT', -> console.log "SIGINT handled"
process.stdin.pipe(process.stdout)
console.log "PID: #{process.pid}"
Console Output:
PID: 6916
SIGINT handled (this happens when pressing ctrl-c in console)
SIGINT handled (this happens when pressing ctrl-c in console)
# process terminates when another process calls process.kill(6916, 'SIGINT')
And here's a python script that handles SIGINT, which is also killed unconditionally by node.js process.kill(PID, 'SIGINT'):
from signal import signal, SIGINT
import os
import time
def handler(signum, frame):
print "signal handled:", signum,
raise KeyboardInterrupt
signal(SIGINT, handler)
print "PID: ", os.getpid()
while True:
try:
time.sleep(1e6)
except KeyboardInterrupt:
print " KeyboardInterrupt handled"
Console output:
PID: 6440
signal handled:2 KeyboardInterrupt handled (this happens when pressing ctrl-c in console)
signal handled:2 KeyboardInterrupt handled (this happens when pressing ctrl-c in console)
# process terminated by another node.js script's process.kill(6440, 'SIGINT')
Why isn't the handler called?
