The following dumb script is for playing with Python signal handling
under Linux. It does show some minor descrepancies between the names
returned by kill -l and the signal.SIG* names.
To actually kill this you have to send it an uncatchable signal
such as kill -9 (kill -SIGKILL). So make sure to background it
or to have another terminal (window, virtual console, whatever)
into which you can enter your kill command.
#!/usr/bin/env python
import signal
linuxsigs = { 1: "SIGHUP", 2: "SIGINT", 3: "SIGQUIT", 4: "SIGILL",
5: "SIGTRAP", 6: "SIGABRT", 7: "SIGBUS", 8: "SIGFPE",
9: "SIGKILL", 10: "SIGUSR1", 11: "SIGSEGV", 12: "SIGUSR2",
13: "SIGPIPE", 14: "SIGALRM", 15: "SIGTERM", 17: "SIGCHLD",
18: "SIGCONT", 19: "SIGSTOP", 20: "SIGTSTP", 21: "SIGTTIN",
22: "SIGTTOU", 23: "SIGURG", 24: "SIGXCPU", 25: "SIGXFSZ",
26: "SIGVTALRM", 27: "SIGPROF", 28: "SIGWINCH", 29: "SIGIO",
30: "SIGPWR", 31: "SIGSYS",
32: "SIGRTMIN", 33: "SIGRTMIN+1", 34: "SIGRTMIN+2", 35: "SIGRTMIN+3",
36: "SIGRTMIN+4", 37: "SIGRTMIN+5", 38: "SIGRTMIN+6", 39: "SIGRTMIN+7",
40: "SIGRTMIN+8", 41: "SIGRTMIN+9", 42: "SIGRTMIN+10", 43: "SIGRTMIN+11",
44: "SIGRTMIN+12", 45: "SIGRTMIN+13", 46: "SIGRTMIN+14", 47: "SIGRTMIN+15",
48: "SIGRTMAX-15", 49: "SIGRTMAX-14", 50: "SIGRTMAX-13", 51: "SIGRTMAX-12",
52: "SIGRTMAX-11", 53: "SIGRTMAX-10", 54: "SIGRTMAX-9", 55: "SIGRTMAX-8",
56: "SIGRTMAX-7", 57: "SIGRTMAX-6", 58: "SIGRTMAX-5", 59: "SIGRTMAX-4",
60: "SIGRTMAX-3", 61: "SIGRTMAX-2", 62: "SIGRTMAX-1", 63: "SIGRTMAX" }
# Ugly bit of introspection follows:
pysignames = filter(lambda x: x[0:3]=="SIG" and x[3]!='_', dir(signal))
pysigs = {}
for i in pysignames:
pysigs[signal.__dict__[i]] = i
del(pysignames)
def prsig(sig,sframe):
print "%d (%s?: %s) received" % \
(sig,linuxsigs[sig],pysigs.get(sig, "Uknown"))
if __name__ == '__main__':
for i in linuxsigs.keys():
signal.signal(i, prsig)
print "Signal set for: %s (%d %s?)" % (linuxsigs[i], i, pysigs.get(i))
while i:
## Must send "uncatchable" signal to end program?
## Could add sigalarm + time support?
signal.pause()