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Full Discussion: Capture error before pipe
Top Forums Shell Programming and Scripting Capture error before pipe Post 303007898 by Catullus on Thursday 23rd of November 2017 08:05:37 AM
Old 11-23-2017
Capture error before pipe

Hi,

I have a script that runs a tar command to standard out then pipes to a gzip:
Code:
tar cfE - * | gzip -c > OUT.gz

At the moment, even if the tar fails (e.g. because of lack of disk space), the gzip still runs successfully.

Is there a way to make the whole line exit with a non-zero error status if the tar fails? I have to run it on a single line, because it is tar'ing a large directory.

Thanks


Moderator's Comments:
Mod Comment
Please wrap all code, files, input & output/errors in CODE tags.
It makes it easier to read and preserves spaces for indenting or fixed-width data.

Last edited by rbatte1; 11-23-2017 at 09:06 AM.. Reason: Added CODE tags
 

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BF_TAR(1)						    Bogofilter Reference Manual 						 BF_TAR(1)

NAME
bf_tar - shell script to write a tar file of a bogofilter directory to stdout SYNOPSIS
bf_tar [-r] [-R] bogofilter_directory DESCRIPTION
bf_tar bundles a bogofilter working directory in tar format and copies it to standard output (your console, or where you redirect it, see EXAMPLES below). OPTIONS
The -r option causes bf_tar to remove inactive log files after the archive has been written successfully. The default is to leave log files. The -R option causes bf_tar to remove inactive log files before the archive is written. This may reduce chances that the resulting archive is recoverable should it become damaged. The archive may be smaller though. The default is to leave log files. EXIT STATUS
The script exits with status code 0 if everything went well, and nonzero if it encountered trouble. EXAMPLES
o bf_tar ~/.bogofilter > outfile.tar Writes a standard .tar file containing the essential files from ~/.bogofilter to outfile.tar. o bf_tar ~/.bogofilter | gzip -9 -c > outfile.tar.gz Writes a gzipped .tar.gz file containing the essential files from ~/.bogofilter to outfile.tar.gz. o bf_tar `pwd`/mydirectory > outfile.tar Prepend $(pwd)/ or `pwd`/ if you want to specify an absolute path instead of a relative path. NOTES
This script is meant for use with Berkeley DB based bogofilter versions. This script requires a SUSv2 compliant pax utility. This script expects a SUSv2 compliant shell. Solaris systems should have the SUNWxcu4 package installed (when bogofilter is configured) so that /usr/xpg4/bin/sh can be used. AUTHORS
Matthias Andree Bogofilter 10/22/2012 BF_TAR(1)
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