08-25-2012
Quote:
Originally Posted by
nrjrasaxena
I would be really happy if bash scripts can run there. Just to mention, I do use simple bash bourne scripts there. And they work. But this particular one failed.
Thanks
Pooja
Fixed that for you.
Not all Bourne shells are BASH. BASH is a Bourne shell, with extended features that a generic Bourne shell doesn't have -- like arrays, and functions.
There is also more than one version of BASH. Some of them support more things than others. Only very new versions of BASH have direct regex support for example, i.e.
[[ "$STRING" =~ /regex/ ]] so don't use that if you don't know your system will have have BASH and a
very new bash at that.
Avoiding BASH features will make your scripts much closer to generic Bourne scripts, which should theoretically work equally well in bash, sh, and ksh. You may be surprised how much you can do without them; a lot of things people use arrays for can be replaced with
set --, proper use of the
read command and IFS, or simple string-splitting, for instance.
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LIBBASH(7) libbash Manual LIBBASH(7)
NAME
libbash -- A bash shared libraries package.
DESCRIPTION
libbash is a package that enables bash dynamic-like shared libraries. Actually its a tool for managing bash scripts whose functions you may
want to load and use in scripts of your own.
It contains a 'dynamic loader' for the shared libraries ( ldbash(1)), a configuration tool (ldbashconfig(8)), and some libraries.
Using ldbash(1) you are able to load loadable bash libraries, such as getopts(1) and hashstash(1). A bash shared library that can be loaded
using
ldbash(1) must answer 4 requirments:
1. It must be installed in $LIBBASH_PREFIX/lib/bash (default is /usr/lib/bash).
2. It must contain a line that begins with '#EXPORT='. That line will contain (after the '=') a list of functions that the library
exports. I.e. all the function that will be usable after loading that library will be listed in that line.
3. It must contain a line that begins with '#REQUIRE='. That line will contain (after the '=') a list of bash libraries that are
required for our library. I.e. every bash library that is in use in our bash library must be listed there.
4. The library must be listed (For more information, see ldbashconfig(8)).
Basic guidelines for writing library of your own:
1. Be aware, that your library will be actually sourced. So, basically, it should contain (i.e define) only functions.
2. Try to declare all variables intended for internal use as local.
3. Global variables and functions that are intended for internal use (i.e are not defined in '#EXPORT=') should begin with:
__<library_name>_
For example, internal function myfoosort of hashstash library should be named as
__hashstash_myfoosort
This helps to avoid conflicts in global name space when using libraries that come from different vendors.
4. See html manual for full version of this guide.
AUTHORS
Hai Zaar <haizaar@haizaar.com>
Gil Ran <ril@ran4.net>
SEE ALSO
ldbash(1), ldbashconfig(8), getopts(1), hashstash(1) colors(1) messages(1) urlcoding(1) locks(1)
Linux Epoch Linux