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Top Forums Shell Programming and Scripting what does if[$? -ne 0] mean in unix Post 302216689 by danmero on Monday 21st of July 2008 12:37:22 AM
Old 07-21-2008
Quote:
Originally Posted by naughty21
...but can u tell me what is the previous return code............
is the command or code above the if statement ?
Is the exit code of the previous command.

Quote:
Originally Posted by naughty21
and also can u tell me what does this means if [ $# -ne 3 ];
If the number of arguments is not equal to 3 ... do something.

You should begin by reading An Introduction To Shell Programming
... and when you finish proceed to: https://www.unix.com/answers-frequent...tutorials.html

Last edited by danmero; 07-21-2008 at 02:04 AM.. Reason: add link to tutorials
 

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uri_urn(n)					    Tcl Uniform Resource Identifier Management						uri_urn(n)

__________________________________________________________________________________________________________________________________________________

NAME
uri_urn - URI utilities, URN scheme SYNOPSIS
package require Tcl 8.2 package require uri::urn ?1.1.2? uri::urn::quote url uri::urn::unquote url _________________________________________________________________ DESCRIPTION
This package provides two commands to quote and unquote the disallowed characters for url using the urn scheme, registers the scheme with the package uri, and provides internal helpers which will be automatically used by the commands uri::split and uri::join of package uri to handle urls using the urn scheme. COMMANDS
uri::urn::quote url This command quotes the characters disallowed by the urn scheme (per RFC 2141 sec2.2) in the url and returns the modified url as its result. uri::urn::unquote url This commands performs the reverse of ::uri::urn::quote. It takes an urn url, removes the quoting from all disallowed characters, and returns the modified urls as its result. BUGS, IDEAS, FEEDBACK This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category uri of the Tcllib SF Trackers [http://sourceforge.net/tracker/?group_id=12883]. Please also report any ideas for enhancements you may have for either package and/or documentation. KEYWORDS
rfc 2141, uri, url, urn CATEGORY
Networking uri 1.1.2 uri_urn(n)
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