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Full Discussion: Bash: Need help with grep
Top Forums Shell Programming and Scripting Bash: Need help with grep Post 303003368 by apmcd47 on Wednesday 13th of September 2017 09:13:18 AM
Old 09-13-2017
Instead of
Code:
if ps | grep -v grep | grep $SERVICE > /dev/null

try
Code:
if pgrep "$SERVICE" > /dev/null

Stupid question, but why

Code:
sudo systemctl stop hyperion.service 2>/dev/null; sudo /etc/init.d/hyperion stop 2>/dev/null ; sudo /sbin/initctl stop hyperion 2>/dev/null

Each of these commands does the same thing. Wouldn't this be better?
Code:
if pgrep "$SERVICE" > /dev/null
then
   if [ -x /bin/systemctl ] 
   then sudo systemctl stop hyperion.service 2>/dev/null
   elif [ -x /sbin/initctl ] 
   then sudo /sbin/initctl stop hyperion 2>/dev/null
   else sudo /etc/init.d/hyperion stop 2>/dev/null
   fi
else
   if [ -x /bin/systemctl ] 
   then sudo systemctl start hyperion.service 2>/dev/null
   elif [ -x /sbin/initctl ] 
   then sudo /sbin/initctl start hyperion 2>/dev/null
   else sudo /etc/init.d/hyperion start 2>/dev/null
   fi
fi

Andrew
This User Gave Thanks to apmcd47 For This Post:
Chuchu211
 

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LEARN ABOUT HPUX

service

SERVICE(8)                                                    System Manager's Manual                                                   SERVICE(8)

NAME

       service - run a System V init script

SYNOPSIS

       service SCRIPT COMMAND [OPTIONS]

       service --status-all

       service --help | -h | --version

DESCRIPTION

       service  runs  a System V init script or systemd unit in as predictable an environment as possible, removing most environment variables and
       with the current working directory set to /.

       The SCRIPT parameter specifies a System V init script, located in /etc/init.d/SCRIPT, or the name of a systemd unit.  The  existence  of  a
       systemd unit of the same name as a script in /etc/init.d will cause the unit to take precedence over the init.d script.  The supported val-
       ues of COMMAND depend on the invoked script. service passes COMMAND  and OPTIONS to the init script unmodified. For systemd  units,  start,
       stop, status, and reload are passed through to their systemctl/initctl equivalents.

       All scripts should support at least the start and stop commands.  As a special case, if COMMAND is --full-restart, the script is run twice,
       first with the stop command, then with the start command.

       service --status-all runs all init scripts, in alphabetical order, with the status command. The status is [ + ] for running services, [ - ]
       for stopped services and [ ? ] for services without a status command.  This option only calls status for sysvinit jobs.

EXIT CODES

       service calls the init script and returns the status returned by it.

FILES

       /etc/init.d
              The directory containing System V init scripts.

       /{lib,run,etc}/systemd/system
              The directories containing systemd units.

ENVIRONMENT

       LANG,  LANGUAGE,  LC_CTYPE, LC_NUMERIC, LC_TIME, LC_COLLATE, LC_MONETARY, LC_MESSAGES, LC_PAPER, LC_NAME, LC_ADDRESS, LC_TELEPHONE, LC_MEA-
       SUREMENT, LC_IDENTIFICATION, LC_ALL, TERM, PATH
              The only environment variables passed to the init scripts.

SEE ALSO

       /etc/init.d/skeleton
       update-rc.d(8)
       init(8)
       invoke-rc.d(8)
       systemctl(1)

AUTHOR

       Miloslav Trmac <mitr@redhat.com>, Petter Reinholdtsen <pere@hungry.com>

       Licence: GNU Public Licence v2 (GPLv2)

COPYRIGHT

       2006 Red Hat, Inc.,  Petter Reinholdtsen <pere@hungry.com>

Jan 206                                                                                                                                 SERVICE(8)
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