08-06-2009
Thank you all Corona688 and matrixmadhan for your replies,
Because I have 2 applications and need to make communication via files and signal.
The first application shall write some files then send a signal to the second application telling the second to processes and then delete those files.
The problem is that, when the second is processing those files, the first one may throw new files and signal (the goal is the second gets latest data); therefore the second might delete new files which leads to lost of data or to be consistent.
So I hope that, I could, when a signal comes the second restarts processing those files (and discard instructions from previous signal action). I know this is not nature of signal handling.
(I know that I can make it synchronously by making the second send back a signal to the first to tell that it is ready to receive new signal, for example).
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killall(8) System Manager's Manual killall(8)
NAME
killall - Terminates all processes started by the user, except the calling process
SYNOPSIS
/usr/sbin/killall [- | [-]signal_name | -signal_number]
/usr/sbin/killall -l
FLAGS
The hyphen character (without an argument) sends a SIGTERM signal initially and then sends a SIGKILL signal to all processes that survive
for 30 seconds after receipt of the first signal. This gives processes that catch the SIGTERM signal an opportunity to clean up. A signal
name, optionally preceded by a hyphen, sends the specified signal to processes. The hyphen character (with a signal number argument) sends
the specified signal, either a name, stripped of the SIG prefix (such as KILL), or a number (such as 9). For information about signal
names and numbers, see the signal() system call.
In the System V habitat, the optional signal number does not have to be preceded with a hyphen (-). Lists signal names in numerical order
(as given in the /usr/include/signal.h file), stripped of the common SIG prefix.
DESCRIPTION
This command provides a convenient means of killing all processes created by the shell that you control. When started by the superuser,
the killall command kills all processes that can be terminated, except those processes that started it, the kernel processes, and processes
0 and 1 (init).
Security Configuration
This command is modified in all security configurations of the system.
EXAMPLES
To stop all background processes that have started, enter: killall This sends all background processes signal 9 (the kill signal, also
called SIGKILL). To stop all background processes, giving them a chance to clean up, enter: killall - This sends signal 15 (SIGTERM),
waits 30 seconds, and then sends signal 9 (SIGKILL). To send a specific signal to the background processes, enter: killall -2 This sends
signal 2 (SIGINT) to the background processes. To list the signal names in numerical order, stripped of the SIG prefix, enter: killall -l
This displays a list of signals, which may vary from system to system.
FILES
Specifies the command path
RELATED INFORMATION
Calls: kill(2), sigaction(2), signal(2) delim off
killall(8)