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Operating Systems HP-UX Suppressing errors from command output Post 303017378 by RudiC on Tuesday 15th of May 2018 04:47:25 AM
Old 05-15-2018
You are piping the command's stdout to grep and then redirecting grep's stderr to the null device. Where does the command's stderr go to?

EDIT: Alternatively, make it all a "compound command":
 

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GRC(1)							      General Commands Manual							    GRC(1)

NAME
grc - frontend for generic colouriser grcat(1) SYNOPSIS
grc [options] command [args] DESCRIPTION
grc will execute command command with optional parameters [args] piping its stdout or stderr into grcat, with apropriate configuration file. Configuration file for grc is determined by /etc/grc.conf file. Format of /etc/grc.conf: each entry consists of 2 lines, between entries there can be any number of empty lines or lines beginning with # (comments) First line is regular expression, second line the name of configuration file for grcat. Configuration file after the first regular expression matching command [args] will be passed to grcat as its configuration file OPTIONS
--help Show summary of options. --version Display version. -e --stderr Redirect error output. Unless -s is selected as well, this cancels redirection of standard output via grcat -s --stdout Redirect standard output. Used to redirect standard output together with --stderr option. --colour=x x is one of on off auto --colour=on will colourise (default) --colour=off will just execute command without colourising. --colour=auto will test if standard output is a tty, and colourise only when it is. SEE ALSO
grcat(1) AUTHOR
Written by Radovan Garabik <garabik @ kassiopeia.juls.savba.sk> GRC(1)
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