Wow! Thanks, Ian. Put it on pulp and I'LL BUY IT!
/mario
>On Fri, 2002-08-30 at 09:25, Mario Lombardo wrote:
>> Ok, now I'm very confused. My output looks exactly like yours below,
>> yet I get better results with insmod. How does that make any sense?
>>
>> What's "value of $0?" An "echo $0" returns "-bash."
>
>Whenever a program runs in Unix, the command line that started it is
>passed as an "argv" list of parameters to the main() function. The first
>parameter is always the command that started the currently running
>program, and the rest of the parameters are arguments that you included
>on the command line. You can actually change argv[0] and the command
>name will change in the process table ("ps" will show whatever you set
>in argv[0]).
>
>In sh/bash/csh/ksh/..., these command line parameters are mapped to $0
>through $9. So, if you write a script like this:
>
> $ cat > myscript.sh <<EOF
> #!/bin/bash
> echo $0
> EOF
> $ chmod 755 myscript.sh
> $ ./myscript.sh
>
>This will print "./myscript.sh", as that is the name of the command that
>started this script. Note the included path before the script name.
>But...
>
> $ ln -s myscript.sh foo.sh
> $ ./foo.sh
>
>Will print "./foo.sh", even though the REAL script is named myscript.sh
>When the command was run, $0 (or argv[0]) is set to the full command
>that was used to start the script.
>
>You can also use $1...$9 (or $*) to represent any command line options:
>
> $ echo 'echo argument1: $1' >> myscript.sh
> $ echo 'echo arguments: $*' >> myscript.sh
> $ ./foo.sh one two three four
>
>This will print:
>
> ./foo.sh
> argument1: one
> arguments: one two three four
>
>If you have more than 9 arguments, you must use the "shift" shell
>builtin to shift the arguments to the left by one (the first one in the
>list will "drop off"):
>
> $ echo 'shift ; echo arguments -1: $*' >> myscript.sh
> $ ./foo.sh one two three four
>
>Which will print
>
> ./foo.sh
> argument1: one
> arguments: one two three four
> arguments -1: two three four
>
>That's a short mini-howto on shell argument processing. Enjoy.
>
>- Ian C. Blenke <icblenke@nks.net> <ian@blenke.com>
>http://ian.blenke.com
>
This archive was generated by hypermail 2.1.3 : Fri Aug 01 2014 - 18:33:13 EDT