Sponsored Content
Full Discussion: ##*_ - whats this?
Top Forums Shell Programming and Scripting ##*_ - whats this? Post 302264588 by Autocross.US on Thursday 4th of December 2008 09:15:22 AM
Old 12-04-2008
They are pattern matching arguments used to strip off certain portions of a string from either the front or end of the string.

Example:
Code:
$ >  STRING=this_test_string
$ >  echo ${STRING##*_}
string

$ >  DIR=/home/user1/test
$ > echo ${DIR##*/}
test

 

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Whats does this mean

Found this piece of code written in ksh. I have no ideas what do the stuff like ${SRF##*\.} do. SUFFIX=${SRF##*\.} if ; then SUFFIX="" fi I have encountered similar expressions in other programs also. Any pointers on where to learn more about these... (1 Reply)
Discussion started by: jyotipg
1 Replies

2. Post Here to Contact Site Administrators and Moderators

Whats the go?

woofie, Your posts are being deleted because your use of profanity. I am close to changing your status to read only. In fact, if you argue with the mods again, I will ban you from these boards. Neo (1 Reply)
Discussion started by: Neo
1 Replies

3. What is on Your Mind?

Whats Behind Your Name?

Looking at the member list, there are alot of interesting names, some unique, some bizarre, and some that are just plain. How did you come by your name? Why did you choose your label? Me? Well, I wish I could change mine. I chose Google because thats how I stumbled upon this site. I wasn't sure... (66 Replies)
Discussion started by: google
66 Replies

4. Shell Programming and Scripting

whats the difference between $* and $@

Hi, whats the difference between $* and $@ in command line arguments to a shell scripts (3 Replies)
Discussion started by: pbsrinivas
3 Replies

5. Shell Programming and Scripting

tell me whats wrong in this?

#! /bin/bash head -5 $1 echo "remove $1 ?" read answer if then echo invalid answer elif rm $1 echo "$1 is deleted" elif then echo file is not deleted else echo "invalid answer" fi What i really want this to do is to ask to delete the file or not..it says something wrong... (1 Reply)
Discussion started by: nadman123
1 Replies

6. Shell Programming and Scripting

tell me whats wrong with this

#! /bin/bash USAGE=" | ] if then echo "$USAGE" exit 1 fi while getopts lb: OPTION do case $(OPTION)in a) echo Hi there! exit 2;; b) echo hello o) OARG=$OPTARG;; \?)echo "$USAGE" ;; exit 2;; esac done shift `expr... (1 Reply)
Discussion started by: nadman123
1 Replies

7. Shell Programming and Scripting

whats this NAME=${0##*/}

hi all, i found NAME=${0##*/} in a script. i given this coomand in my unix box(presently in ksh). echo ${0##*/} it returned ksh. the purpose of the above is to return the shell name or more than that. do you have any more information like this, please share with me. one more query... (7 Replies)
Discussion started by: Arunprasad
7 Replies

8. UNIX for Dummies Questions & Answers

whats wrong with this?

can anyone tell me why this code doesn't work how its supposed to, its the hangman game but it doesn't play how its supposed to #!/bin/bash NoAttempts="0" livesgiven="5" LivesRemain=$livesgiven LettersAttempted="" wordfile=words numwords=0 function menu() { clear cat << menu... (1 Reply)
Discussion started by: ferrycorsten73
1 Replies

9. Homework & Coursework Questions

Whats wrong with the following

Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted! 1. The problem statement, all variables and given/known data: ls -ld htdocs drwxr-x--- 3 root root 8192 2006-11-19 10:41 htdocs How would a host administrator... (1 Reply)
Discussion started by: Larry_1
1 Replies
TEMPFILE(1)						      General Commands Manual						       TEMPFILE(1)

NAME
tempfile - create a temporary file in a safe manner SYNOPSIS
tempfile [-d DIR] [-p STRING] [-s STRING] [-m MODE] [-n FILE] [--directory=DIR] [--prefix=STRING] [--suffix=STRING] [--mode=MODE] [--name=FILE] [--help] [--version] DESCRIPTION
tempfile creates a temporary file in a safe manner. It uses tempnam(3) to choose the name and opens it with O_RDWR | O_CREAT | O_EXCL. The filename is printed on standard output. See tempnam(3) for the actual steps involved in directory selection. The directory in which to create the file might be searched for in this order (but refer to tempnam(3) for authoritative answers): a) In case the environment variable TMPDIR exists and contains the name of an appropriate directory, that is used. b) Otherwise, if the --directory argument is specified and appropriate, it is used. c) Otherwise, P_tmpdir (as defined in <stdio.h>) is used when appropriate. d) Finally an implementation-defined directory (/tmp) may be used. OPTIONS
-d, --directory DIR Place the file in DIR. -m, --mode MODE Open the file with MODE instead of 0600. -n, --name FILE Use FILE for the name instead of tempnam(3). The options -d, -p, and -s are ignored if this option is given. -p, --prefix STRING Use up to five letters of STRING to generate the name. -s, --suffix STRING Generate the file with STRING as the suffix. --help Print a usage message on standard output and exit successfully. --version Print version information on standard output and exit successfully. RETURN VALUES
An exit status of 0 means the temporary file was created successfully. Any other exit status indicates an error. BUGS
Exclusive creation is not guaranteed when creating files on NFS partitions. tempfile is deprecated; you should use mktemp(1) instead. EXAMPLE
#!/bin/sh #[...] t=$(tempfile) || exit trap "rm -f -- '$t'" EXIT #[...] rm -f -- "$t" trap - EXIT exit SEE ALSO
tempnam(3), mktemp(1) Debian 30 May 2011 TEMPFILE(1)
All times are GMT -4. The time now is 04:59 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy