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Full Discussion: Bash: Need help with grep
Top Forums Shell Programming and Scripting Bash: Need help with grep Post 303003359 by Chuchu211 on Wednesday 13th of September 2017 05:41:44 AM
Old 09-13-2017
Bash: Need help with grep
Hi, I want to write a bash that can turn an application on if it is off or on if it is off. I found a script for LibreELEC, but my OS is OSMC (a Linux distribution, too). I already modiefied lines 5 and 7:
Code:
#!/bin/sh
SERVICE='hyperiond'
if ps | grep -v grep | grep $SERVICE > /dev/null
then
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
else
sudo systemctl start hyperion.service 2>/dev/null ; sudo /etc/init.d/hyperion start 2>/dev/null ; sudo /sbin/initctl start hyperion 2>/dev/null
fi

Line 5 and line 7 work when I use them in Putty, so I think line 1 to 3 are the problem. If I run the script it only turnes the application on, but not off. Can you tell me what lines 1 to 3 do so I can fix them? I found a phython script that should work and do the same, just for reference (I want to use bash, as I want to expand the script once it's running).
Code:
 import subprocess
pid = subprocess.Popen('pidof hyperiond', shell=True, close_fds=True, stdout=subprocess.PIPE)
try:     
if pid.stdout.readlines():
subprocess.Popen('killall hyperiond', shell=True)
else:
subprocess.Popen('/opt/hyperion/bin/hyperiond /etc/hyperion.config.json </dev/null >/dev/null 2>&1 &', shell=True)
except Exception, e:
pass

Thanks Smilie
Last edited by Chuchu211; 09-13-2017 at 08:22 AM..
 

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LEARN ABOUT SUSE

bashbug

BASHBUG(1)						      General Commands Manual							BASHBUG(1)

NAME

       bashbug - report a bug in bash

SYNOPSIS

       bashbug [--version] [--help] [email-address]

DESCRIPTION

       bashbug	is  a shell script to help the user compose and mail bug reports concerning bash in a standard format.	bashbug invokes the editor
       specified by the environment variable EDITOR on a temporary copy of the bug report format outline. The user must fill  in  the  appropriate
       fields  and  exit  the  editor.	 bashbug  then	mails the completed report to bug-bash@gnu.org, or email-address.  If the report cannot be
       mailed, it is saved in the file dead.bashbug in the invoking user's home directory.

       The bug report format outline consists of several sections.  The first section provides information about the  machine,	operating  system,
       the  bash  version, and the compilation environment.  The second section should be filled in with a description of the bug.  The third sec-
       tion should be a description of how to reproduce the bug.  The optional fourth section is for a proposed fix.  Fixes are encouraged.

ENVIRONMENT

       bashbug will utilize the following environment variables if they exist:

       EDITOR Specifies the preferred editor. If EDITOR is not set, bashbug defaults to emacs.

       HOME   Directory in which the failed bug report is saved if the mail fails.

       TMPDIR Directory in which to create temporary files and directories.

SEE ALSO

       bash(1)

AUTHORS

       Brian Fox, Free Software Foundation
       bfox@gnu.org

       Chet Ramey, Case Western Reserve University
       chet@po.cwru.edu

GNU Bash-4.0							   1998 July 30 							BASHBUG(1)
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