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Shell Programming and Scripting
how to trap unix signal if the process killed/interupt occured in bash...
Post 302137112 by manas_ranjan on Saturday 22nd of September 2007 07:14:00 AM
09-22-2007
you are right...i sudn't trap the kill, but what about other signals, how can i catch .....thru trap....in bash
i am doing following
function trap_cmd {
echo "It's wrong way to stop the process."
exit 2
}
trap 'trap_cmd' 1 2 3 4 5 6 7 8 10 12 13 14 15 20
but even though CTRL-C,Z ..... it's not going to echo me It's wrong way to stop the process.
so kindly suggest....for bash.
i am doing following
function trap_cmd {
echo "It's wrong way to stop the process."
exit 2
}
trap 'trap_cmd' 1 2 3 4 5 6 7 8 10 12 13 14 15 20
but even though CTRL-C,Z ..... it's not going to echo me It's wrong way to stop the process.
so kindly suggest....for bash.
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LEARN ABOUT NETBSD
kill
KILL(1) BSD General Commands Manual KILL(1) NAME
kill -- terminate or signal a process SYNOPSIS
kill [-s signal_name] pid ... kill -l [exit_status] kill -signal_name pid ... kill -signal_number pid ... DESCRIPTION
The kill utility sends a signal to the process(es) specified by the pid operand(s). Only the super-user may send signals to other users' processes. The options are as follows: -s signal_name A symbolic signal name specifying the signal to be sent instead of the default TERM. -l [exit_status] Display the name of the signal corresponding to exit_status. exit_status may be the exit status of a command killed by a signal (see the special sh(1) parameter '?') or a signal number. If no operand is given, display the names of all the signals. -signal_name A symbolic signal name specifying the signal to be sent instead of the default TERM. -signal_number A non-negative decimal integer, specifying the signal to be sent instead of the default TERM. The following pids have special meanings: -1 If superuser, broadcast the signal to all processes; otherwise broadcast to all processes belonging to the user. 0 Broadcast the signal to all processes in the current process group belonging to the user. Some of the more commonly used signals: 1 HUP (hang up) 2 INT (interrupt) 3 QUIT (quit) 6 ABRT (abort) 9 KILL (non-catchable, non-ignorable kill) 14 ALRM (alarm clock) 15 TERM (software termination signal) kill is a built-in to csh(1); it allows job specifiers of the form ``%...'' as arguments so process id's are not as often used as kill argu- ments. See csh(1) for details. SEE ALSO
csh(1), pgrep(1), pkill(1), ps(1), kill(2), sigaction(2), signal(7) STANDARDS
The kill function is expected to be IEEE Std 1003.2 (``POSIX.2'') compatible. HISTORY
A kill command appeared in Version 6 AT&T UNIX. BSD
April 28, 1995 BSD