BASH

[Alexander Dalloz]

Am Sa, den 04.12.2004 schrieb Bill Gradwohl um 16:50:

> Two questions:
> 
> 1) When a BASH script is executed, the file that represents the script 
> must be read by the interpreter. Assuming the script is a long running 
> script, is it safe to modify the script while its executing? The real 
> question boils down to is the entire script read into memory or not 
> before execution starts, or is it read as needed from disk. I ask 
> because I'd like to test a script, and while its running and I see 
> errors, I'd like to modify the script without disturbing the executing 
> version.

Your intention sounds a bit "obscure".

> 2) There seems to be no way to "goto" in BASH. If one has a lengthy 
> script that fails half way down, the only thing to do appears to be to 
> wrap the top half in an if that won't execute so as to skip that top 
> half and get to where the script should again restart. Is there a better 
> way to do this?

Operate with "debug" code like echo lines of states of used variables
and with exit instructions / codes. This will catch part 1) of your
question too. Make use of functions.

advanced bash scripting guide:
http://www.tldp.org/LDP/abs/html/

> Bill Gradwohl

Alexander


-- 
Alexander Dalloz | Enger, Germany | new address - new key: 0xB366A773
legal statement: http://www.uni-x.org/legal.html
Fedora GNU/Linux Core 2 (Tettnang) on Athlon kernel 2.6.9-1.6_FC2smp 
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