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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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Ns_Url(3aolserver)					   AOLserver Library Procedures 					Ns_Url(3aolserver)

__________________________________________________________________________________________________________________________________________________

NAME
Ns_AbsoluteUrl, Ns_ParseUrl, Ns_RelativeUrl, Ns_SkipUrl - URL manipulation routines SYNOPSIS
#include "ns.h" int Ns_AbsoluteUrl(Ns_DString *pds, char *url, char *baseurl) int Ns_ParseUrl(char *url, char **pprotocol, char **phost, char **pport, char **ppath, char **ptail) char * Ns_RelativeUrl(char *url, char *location) char * Ns_SkipUrl(Ns_Request *request, int n) _________________________________________________________________ DESCRIPTION
Ns_AbsoluteUrl(pds, url, baseurl) Construct an URL based on baseurl but with as many parts of the incomplete url as possible. Return NS_OK or NS_ERROR. Ns_ParseUrl(url, pprotocol, phost, pport, ppath, ptail) Parse a URL into its component parts. Pointers to the protocol, host, port, path, and "tail" (last path element) will be set by ref- erence in the passed-in pointers. The passed-in url will be modified. Ns_RelativeUrl(url, location) If the url passed in is for this server, then the initial part of the URL is stripped off. e.g., on a server whose location is http://www.foo.com, Ns_RelativeUrl of "http://www.foo.com/hello" will return "/hello". Returns a pointer to the beginning of the relative url in the passed-in url, or NULL if error. Will set errno on error. Ns_SkipUrl(request, n) Return a pointer n elements into the request's url. SEE ALSO
nsd(1), info(n) KEYWORDS
AOLserver 4.0 Ns_Url(3aolserver)
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