beginner scripting questions User variables Post: 302582325

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Top Forums Shell Programming and Scripting beginner scripting questions User variables Post 302582325 by austing5 on Thursday 15th of December 2011 02:03:51 PM

12-15-2011

Registered User

Quote:

Originally Posted by BeefStu

You can call your script name anything you like. Ie bla.bla xx ....

Typically the first line in the scirpt is the shabang command, this dictates
what shell you are using.. For the most flexibility I would suggest using /bin/ksh Can I assume your other example was /bin/csh and not /bin/tcsh

Lastly you can set a variable like this:

Code:

 
value="test"
let int=3

These are not terribly difficult questions so the best way to find your answers would be to test... Good luck

The way they teach us has always been /bin/sh i was just seeing what was the difference i'm guessing different shells use different command like "set" and "let" . Thanks!

---------- Post updated at 02:03 PM ---------- Previous update was at 01:58 PM ----------

Quote:

Originally Posted by Corona688

Linux and UNIX don't care about the filename at all. They check the first few bytes in the file to see what it is.

All the top line does is tell the OS what shell to use.

If you want to use tcsh, it should be #!/bin/tcsh

If you want to use sh, it should be #!/bin/sh

They both have 'set', actually. But they're not the same 'set'. So it depends which programming language you have been writing for!

Easy:

Code:

VAR="something"

Note that you can't put spaces between VAR, =, and ". like you might in tcsh. It has to be VAR="... with no spaces at all except inside quotes. This is because of the way BASH lets you set variables before running a program:

thats why it wasen't working ! "spaces" awesome!!!! thank you!

austing5

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LEARN ABOUT SUNOS

setusershell

getusershell(3C)					   Standard C Library Functions 					  getusershell(3C)

NAME

       getusershell, setusershell, endusershell - get legal user shells

SYNOPSIS

       #include <unistd.h>

       char *getusershell(void);

       void setusershell(void);

       void endusershell(void);

DESCRIPTION

       The  getusershell()  function  returns  a  pointer  to  a  legal  user  shell  as defined by the system manager in the file /etc/shells. If
       /etc/shells does not exist, the following locations of the standard system shells are used in its place:

       /bin/bash		  /bin/csh
       /bin/jsh 		  /bin/ksh
       /bin/pfcsh		  /bin/pfksh
       /bin/pfsh		  /bin/sh
       /bin/tcsh		  /bin/zsh
       /sbin/jsh		  /sbin/pfsh
       /sbin/sh 		  /usr/bin/bash
       /usr/bin/csh		  /usr/bin/jsh
       /usr/bin/ksh		  /usr/bin/pfcsh
       /usr/bin/pfksh		  /usr/bin/pfsh
       /usr/bin/sh		  /usr/bin/tcsh
       /usr/bin/zsh		  /usr/xpg4/bin/sh

       The getusershell() function opens the file /etc/shells, if it exists, and returns the next entry in the list of shells.

       The setusershell() function rewinds the file or the list.

       The endusershell() function closes the file, frees any memory used by getusershell() and setusershell(), and rewinds the file /etc/shells.

RETURN VALUES

       The getusershell() function returns a null pointer on EOF.

BUGS

       All information is contained in memory that may be freed with a call to endusershell(), so it must be copied if it is to be saved.

SunOS 5.10							    30 Aug 2004 						  getusershell(3C)