Sponsored Content
Top Forums Shell Programming and Scripting Following Symlinks to Actual Script Post 302351458 by jeffclough on Tuesday 8th of September 2009 03:08:50 PM
Old 09-08-2009
Following Symlinks to Actual Script

I need to have my script know what directory it's in, even if it's run from a symlink located elsewhere. 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.

Code:
#!/bin/ksh
prog="$0"
echo "prog='$prog'"
while [ -L "$prog" ]; do
  prog=$(stat --format %N "$prog" | awk '{s=gensub("^.*-> ","","g");print substr(s,2,length(s)-2);}')
  echo "prog='$prog'"
done
dir=`dirname "$prog"`
echo "dir='$dir'"

 

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

Symlinks

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
ED(1)							      General Commands Manual							     ED(1)

NAME
ed - editor SYNOPSIS
ed file OPTIONS
- Suppress line/byte count messages (for in scripts) EXAMPLES
ed prog.c # Edit prog.c echo '1,$p' | ed - file # Odd way to write 'cat file' DESCRIPTION
Ed is functionally equivalent to the standard V7 editor, ed. It supports the following commands: (.) a: append (.,.)c: change (.,.)d: delete e: edit new file" f: print name of edited file" (1,$)g: global command (.) i: insert (.,.+1)j: join lines together (.) k: mark (.) l: print with special characters in octal (.,.)m: move (.,.)p: print q: quit editor" (.) r: read in new file (.,.)s: substitute (1,$)v: like g, except select lines that do not match (1,$)w: write out edited file Many of the commands can take one or two addresses, as indicated above. The defaults are shown in parentheses. Thus a appends to the cur- rent line, and g works on the whole file as default. The dot refers to the current line. Below is a sample editing session with comments given following the # symbol. ed prog.c # Edit prog.c 3,20p # Print lines 3 through 20 /whole/ # Find next occurence of whole s/whole/while/ # Replace whole by while g/Buf/s//BUF/g # Replace Buf by BUF everywhere w # Write the file back q # Exit the editor Ed is provided for its sentimental value. If you want a line-oriented editor, try ex. If you want a good editor, use elle, elvis, or mined. SEE ALSO
elvis(1), elle(9), mined(9). ED(1)
All times are GMT -4. The time now is 09:47 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy