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Top Forums Shell Programming and Scripting Killing a program in shell script Post 302779081 by MadeInGermany on Tuesday 12th of March 2013 05:49:14 AM
Old 03-12-2013
Quote:
Originally Posted by phpchick
would something like this also work?
Code:
some_command some_arg1 some_arg2 &
TASK_PID=$!
sleep 15
kill $TASK_PID

With a 15, yes.
With bigger values, there is a chance that the background process terminated and, as the system PIDs cycle, there is another process with the old PID. And you don't want to kill that Smilie

If you have a shell with job control, you can use the safer kill %1.

---------- Post updated at 04:49 AM ---------- Previous update was at 04:31 AM ----------

Unix standard shells do not have job control.
I am just thinking about another background process:
Code:
# fire the background command, cut standard connections to this shell
some_command some_arg1 some_arg2 </dev/null >/dev/null 2>&1 &
task_pid=$!
# fire a watchdog, again cut the connections
(sleep 900; kill $task_pid) </dev/null >/dev/null 2>&1 &
watchdog_pid=$!
wait $task_pid
kill $watchdog_pid

 

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ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
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