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so if someone will call with sh, dash or so its up to them?
Nope. The hashbang (or shebang) tells the OS what needs to be used to execute/interpret the script that follows.
For example, if a script starts with: #!/bin/bash - all that follows is done by bash, #!/usr/bin/perl - all that follows is done by perl, #!/bin/dash - all that follows is done by dash.
There are a lot more examples, but I guess you get the picture.
Also have a look here for a more comprehensive explanation: Shebang (Unix)
I think Kalleanka's code helps in a situation where a user is using something like ksh interactively and types "sh scriptname", instead of doing the chmod. I often do that because it's faster, but I use bash
I wonder, is $BASH exportable to other shells? i.e. if bash runs ash.. will $BASH exist in the environment of ash?.. i forgot about this already.. but I think $BASH_VERSION or $BASH_VERSINFO is safe..
Last edited by konsolebox; 02-16-2011 at 01:55 AM.
I wonder, is $BASH exportable to other shells? i.e. bash runs ash.. will $BASH exist in the environment of ash?.. i forgot about this already.. but I think $BASH_VERSION or $BASH_VERSINFO is safe..
ntubski was correct about $BASH. $BASH_VERSION and $BASH_VERSINFO are also _not_ exported when switching shells.
off topic: bash 4.2 has been released last feb. 13 and i've checked the changelog.. one of its features says that a new option in declare/typeset has been added and it's '-g' .. with that option, variables can now be declared global in any scope even inside functions.. finally. and i'm the one who made this request before as well
i can finally make the final versions of Shell Script Loader with this ^_^
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