Sponsored Content
Top Forums Shell Programming and Scripting ksh: what does x in front of something mean? Post 302466538 by ctsgnb on Tuesday 26th of October 2010 04:09:41 PM
Old 10-26-2010
remove the x , make a test with an empty ip and see what happen ...



---------- Post updated at 10:09 PM ---------- Previous update was at 10:07 PM ----------




if $ip is empty :
Code:
[[ x$ip = x127.0.0.1 ]]
[[ x = x127.0.0.1 ]] ===> false

now if $ip is empty without x :
Code:
[[ $ip = 127.0.0.1 ]]
[[  = 127.0.0.1 ]] ===> Error

Note that this would not happen using double quote
Code:
[[ "$ip" = "127.0.0.1" ]]
[[ "" = "127.0.0.1" ]] ===> false

Ok course these behaviours may depends on your system OS and SHELL implementation, but this is what "could" be expected

Last edited by ctsgnb; 10-26-2010 at 05:17 PM..
This User Gave Thanks to ctsgnb For This Post:
 

6 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Front end on Unix

Hi, I would like to develop a user interface on Solaris. Can anybody throw some light on currently available software utilities/ packages..? Thanks in Advance .. JS (4 Replies)
Discussion started by: shibz
4 Replies

2. Shell Programming and Scripting

sh, ksh: command to remove front spaces from a string?

dear pro-coders, is there any command out there that takes out the front spaces from a string? sample strings: 4 members 5 members 3 members but it has to be like so: 4 members 5 members 3 members (3 Replies)
Discussion started by: pseudocoder
3 Replies

3. Shell Programming and Scripting

Appending the last few columns to the front

Hi consider this as the first line 00010015 MORGAN STANLEY & CO INCORPORATED N 110 INVESTAR 1 0001OT NJ 201-830-5055 01-Jan-1974 00:00:00 1 01-May-2008 00:00:00 05-Jun-2008 13:34:18 0001 - From SMSRun1_GIDQA02 Consider this as the second line 00010015 MORGAN STANLEY... (3 Replies)
Discussion started by: ragavhere
3 Replies

4. Shell Programming and Scripting

ksh - adding a dynamic value to the front of a line

Hi Forum, Im trying to write some code to read a file, take a certain dynamic value and write it back to the file at the front of every line. For example, file.txt is: SIMPLE=HELLO CONFIDENTIAL=false SENDER=false REQUIRED=true FEEDBACK=false UPDATE=false REQUIRED=false MAPPING=true... (9 Replies)
Discussion started by: ocelot
9 Replies

5. Shell Programming and Scripting

Terminal to the front no matter what

Is there a way to bring the terminal script to the front? I am running this script through OMCEdit which is then running it through Terminal. I have some dialog boxes (using osascript) and the dialog boxes are not coming to the front...Terminal bounces and I have to click on Terminal to see the... (1 Reply)
Discussion started by: mainegate
1 Replies

6. Linux

How to add \ in front of $ in a script with vi?

Please help to provide command in vi to add \ in front of $ so it does not interpret next character. rm interfaces/DART/WEB-INF/classes/DART/util/TotalDisconnectUtil$1.class rm interfaces/DART/WEB-INF/classes/DART/util/TotalDisconnectUtil$2.class rm... (3 Replies)
Discussion started by: ywu081006
3 Replies
times(1)                                                           User Commands                                                          times(1)

NAME
times - shell built-in function to report time usages of the current shell SYNOPSIS
sh times ksh times DESCRIPTION
sh Print the accumulated user and system times for processes run from the shell. ksh Print the accumulated user and system times for the shell and for processes run from the shell. On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways: 1. Variable assignment lists preceding the command remain in effect when the command completes. 2. I/O redirections are processed after variable assignments. 3. Errors cause a script that contains them to abort. 4. Words, following a command preceded by ** that are in the format of a variable assignment, are expanded with the same rules as a vari- able assignment. This means that tilde substitution is performed after the = sign and word splitting and file name generation are not performed. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
ksh(1), sh(1), time(1), attributes(5) SunOS 5.10 15 Apr 1994 times(1)
All times are GMT -4. The time now is 02:46 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy