Issue with pwd for script run by double click on script (MacOS High SIerra) Post: 303031987

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Top Forums Shell Programming and Scripting Issue with pwd for script run by double click on script (MacOS High SIerra) Post 303031987 by LMHmedchem on Friday 8th of March 2019 04:01:21 PM

03-08-2019

Registered User

Issue with pwd for script run by double click on script (MacOS High SIerra)

Hello,

I have the following script that just archives and clears some log files.

Code:

#!/bin/bash

# script: archive_logs_and_clear
# add date to logfile names and copy archive directory 
# clear logs

# change to script directory
cd  /Volumes/Archive_Volume/00_i7-8600k_z370_backup/rsync_log/

# get list of log files
log_flie_list=$(ls *log.txt)

# get date to add to file names
current_date=$(date "+%Y-%m-%d_%H.%M")

# process log files
for file in $log_flie_list; do
   # create filename with date
   temp_name=$current_date'_'$file
   # copy to archive directory
   cp $file ./log_archive/$temp_name
   # remove original log file
   rm -f $file
   # recreate empty log file
    touch $file
done

# quit and close the terminal
exit

The issue is the text in red text where I have to hard code a cd to change pwd to the directory where the script file is located.This file is located on the backup drive in the backup directory structure where the log files are written. When I start the script by a double click, pwd defaults to the user home directory and not to where the script is located. I have to make my way over to the script directory or my ls doesn't find anything,etc. This is not a major issue for this case, though I believe it to be in-elegant to have to hard code the script location.

There are other cases where I may have this script on an external drive where it would not be so easy to know the script location ahead of time to code the path. Is there a way to tell make pwd be the directory where the script file is located, or at least automate the location of the script and the cd path?

Thanks,

LMHmedchem

LMHmedchem

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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 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.  The  supported  values  of  COMMAND  depend  on  the
       invoked	script.  service passes COMMAND and OPTIONS to the init script unmodified.  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  com-
       mand.

       service --status-all runs all init scripts, in alphabetical order, with the status command.

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.

ENVIRONMENT

       LANG, TERM
	      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).

								     Jan 2006								service(8)