On Fri, Nov 26, 2010 at 23:11, Stephen Powell
<zlinuxman@wowway.com> wrote:
On Fri, 26 Nov 2010 11:40:32 -0500 (EST), Joao Ferreira wrote:
> seems that $0 simply contains the program being run and not the
> interpreter that is running it...
Hmm. You're right.
echo $0
works at a shell prompt, but not within a script. I tried it
within a script, sort of, by sourcing it. For example,
. my_script
and it seems to work that way, but not when the script is invoked
by name as a command. So far,
ls -Al /proc/$$/exe
seems to be the best suggestion, but then of course you'll have
to parse the output.
When I'm writing scripts, I try to use the "least common denominator"
approach. In other words, I use code that works with any shell
if I can. If I really need to make use of a feature that only
works in one particular shell (usually bash), I just force bash
to be used by the special comment in line 1:
#!/bin/bash
And then I know it will always be run by bash, regardless of which
shell is the default on the system.
--
.''`. Stephen Powell
: :' :
`. `'`
`-
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