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Top Forums Shell Programming and Scripting Want to terminate command execution when string found in the command output Post 302713053 by alister on Wednesday 10th of October 2012 08:24:36 AM
Old 10-10-2012
If you want a command to terminate after some output has been detected ...

If the command will continue to generate output after the match is found, and if the wait time (could be a fraction of a second, could be weeks) until the command next attempts to write data to a pipe is acceptable, then a simple filter (awk, sed, etc...), which exits immediately after finding the match, could be sufficient. When the command next attempts to write to the pipe, since the filter that was on the other end is now gone, it will be sent a SIGPIPE (default response to this signal is program termination).

If the command to be killed does not write to the pipe regularly, then you need to send it a signal yourself when the match is detected. For this, you need to know the PID of that command.

Regards,
Alister
 

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COMMAND-NOT-FOUND(1)					    http://en.opensuse.org/Sco					      COMMAND-NOT-FOUND(1)

NAME
command-not-found - A command-not-found handler SYNOPSIS
command-not-found {binary_name} {repository} ARGUMENTS
The following arguments are required: binary_name The name of binary you are looking for. repository The name of repository for search. For most cases, use zypp DESCRIPTION
command-not-found handler is designed to tell users which package contains a missing command. The handler is integrated to bash(1) and zsh(1) shells and is not necessary to call it directly. Just type a name of the command in your favourite shell and you'll get a result. If you consider c-n-f handler useless, just add unset command_not_found_handle to your profile or remove the command-not-found package. Handler doesn't call the command-not-found binary directly, it only prints info about it. If you want to invoke it automatically, just add export COMMAND_NOT_FOUND_AUTO=1 to your bash profile. EXAMPLE
: NORMAL USAGE For example you want to try blender, because you have heard that is an amazing program. So just type blender in shell: $ blender You get the following output: The program 'blender' can be found in the following package: * blender [ path: /usr/bin/blender, repository: zypp (openSUSE 11.1-0) ] Try installing with: sudo zypper install blender bash: blender: command not found SEE ALSO
scout(1) AUTHOR
Pavol Rusnak <stick@gk2.sk> Developer http://gitorious.org/opensus 08/07/2009 COMMAND-NOT-FOUND(1)
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