Sponsored Content
Top Forums Shell Programming and Scripting Following Symlinks to Actual Script Post 302351467 by cfajohnson on Tuesday 8th of September 2009 03:55:20 PM
Old 09-08-2009
Originally Posted by jeffclough
I need to have my script know what directory it's in, even if it's run from a symlink located elsewhere.

There should be no reason to need to know that. Rethink your program design.
Here's what I've come up with, for the benefit of anyone with a similar need, but I'm also interested to know if there's a more elegant solution. I'd rather not get into awk-land, but I couldn't get the quoting and escaping right with sed.

echo "prog='$prog'"
while [ -L "$prog" ]; do
  prog=$(stat --format %N "$prog" | awk '{s=gensub("^.*-> ","","g");print substr(s,2,length(s)-2);}')
  echo "prog='$prog'"
dir=`dirname "$prog"`
echo "dir='$dir'"

You don't need awk:

prog=$(stat --format %N "$prog")
prog=${prog#* -> ?}


10 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

search and replace symlinks

Hello All, Assuming i have a thousand symlinks under directory /mydir (and its sub-dir) such as: mysymlink1 -> ../../../myfoo/mysymlink1 mysymlink2 -> ../../../myfoo/mysymlink2 How can I search the string "myfoo" and replaced with "yourfoo" such that after the operation is complete the... (2 Replies)
Discussion started by: nixrock
2 Replies

2. Shell Programming and Scripting

Nested Symlinks?

Please don't laugh or call me a fool... I'm trying to set up a script that will go through my Music File directory and generate a set of symbolic links in a directory called "What's New". Within that directory there will be a "30 Days", "3 Months", "6 Months" and "A Year" directories. Within... (0 Replies)
Discussion started by: deckard
0 Replies

3. UNIX for Dummies Questions & Answers


Given a filename, is it possible to know haow many symbolic links are pointing to it? How can I tell? (1 Reply)
Discussion started by: ct1977
1 Replies

4. UNIX for Dummies Questions & Answers

tar symlinks: relative vs absolute

I create the tar file from / like so: tar cEhf name.tar usr/us And this creates the tar with the links intact. The problem is that this tar is going to be used for testing, so we want the links to point to the files in the tar. But when I extract the tar into /tmp, I get /tmp/usr/us/... as I... (2 Replies)
Discussion started by: TreeMan
2 Replies

5. Shell Programming and Scripting

Shell script that will compare two config files and produce 2 outputs 1)actual config file 2)report

Hi I am new to shell scripting. There is a requirement to write a shell script to meet follwing needs.Prompt reply shall be highly appreciated. script that will compare two config files and produce 2 outputs - actual config file and a report indicating changes made. OS :Susi linux ver 10.3. ... (4 Replies)
Discussion started by: muraliinfy04
4 Replies

6. Slackware

Context dependent symlinks

Ive got multiple PCs, sharing an NFS mounted home dir. For certain apps I would like to keep the config files host specific. Easy solution is to create symlinks to local folders for configs. Ideally I would still want the .config files to reside in the user home folder. Is it possible to... (2 Replies)
Discussion started by: agentrnge
2 Replies

7. Shell Programming and Scripting

Look for, backup and delete symlinks

Hi, My first post here: Was looking if someone can help enhancing my code. I am limited to sh or ash shell (android / busybox) I made a script to look for busybox symlinks, backup them and delete them I have these questions about the below code: - busybox tar do not has the options... (2 Replies)
Discussion started by: Phil3759
2 Replies

8. Shell Programming and Scripting

Find + Symlinks = me confused

So i have read the man pages a few time. Searched google but I am not quite sure i understand all the lingo. What i want to do is list all files on / except i dont want any symlinks (because if I am searching / I will find the "true" file...correct?) So there is the -P, -H, and '-type l'... (2 Replies)
Discussion started by: nitrobass24
2 Replies

9. Shell Programming and Scripting

Actual SQL instead of using a file from within a shell script

I am very noobish to UNIX, our guy is on vacation so I am trying to take up some slack while he is away. Typically when we use sql from within a shell script, we do so from a file containing the sql. Example: $ORACLE_HOME/bin/sqlplus $ORA_DBCU/$ORA_DBCP @${cron_dir}/${report_file}.sql ... (10 Replies)
Discussion started by: biobill
10 Replies

10. Shell Programming and Scripting

Rsync move with symlinks

Hi, I use rsync to move from source to target, but there are cases that I need to exclude: Suppose in my file system, I have a soft link ~/data -> /media/volgrp/data. Under data folder, there is a file hello.txt. After moving command "rsync --remove-source-files -aH --force ~/data/... (3 Replies)
Discussion started by: huangyingw
3 Replies
ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD

Featured Tech Videos

All times are GMT -4. The time now is 02:25 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy