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Full Discussion: bash scripting help
Top Forums Shell Programming and Scripting bash scripting help Post 302285124 by vgersh99 on Saturday 7th of February 2009 11:20:14 AM
Old 02-07-2009
First off, please use vB Codes when posting either code or data samples - it makes easier to read for the other potential posters.

Secondly:
Code:
#!/bin/bash
# WHY exporting the PATH?
export PATH
# This is not the way to ADD to a current path - you missed '$'
# PATH="/usr/local/sbin:/usr/sbin:/sbin:/usr/local/bin:/bin:/usr/bin:$PATH"
iptables -F

# This is way too many pipes
#dynip=$(ifconfig ppp0 | grep 'inet addr' | grep -v '127.0.0.1'| awk '{print $2}' | cut -d: -f2) 
dynip=$(ifconfig ppp0 | awk '/inet addr/ && !/127.0.0.1/{print $2}' | cut -d: -f2)

You'll be able to get rid of the trailing 'cut' if you post a sample of your:
Code:
ifconfig ppp0

Quote:
Originally Posted by jimjones
is it possible that $2 is interpreted as the variable the script received from pppd on start instead of using the previous statement as input?
Hm... I don't understand what you're asking, but..... the awk's '$2' in this content refers to the SECOND field on a line that 'ifcong pppd' produces.

Pls post the output of 'ifconfig ppp0'.
 

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INITSCRIPT(5)						Linux System Administrator's Manual					     INITSCRIPT(5)

NAME
initscript - script that executes inittab commands. SYNOPSIS
/bin/sh /etc/initscript id runlevels action process DESCRIPTION
When the shell script /etc/initscript is present, init will use it to execute the commands from inittab. This script can be used to set things like ulimit and umask default values for every process. EXAMPLES
This is a sample initscript, which might be installed on your system as /etc/initscript.sample. # # initscript Executed by init(8) for every program it # wants to spawn like this: # # /bin/sh /etc/initscript <id> <level> <action> <process> # # Set umask to safe level, and enable core dumps. umask 022 ulimit -c 2097151 PATH=/bin:/sbin:/usr/bin:/usr/sbin export PATH # Increase the hard file descriptor limit for all processes # to 8192. The soft limit is still 1024, but any unprivileged # process can increase its soft limit up to the hard limit # with "ulimit -Sn xxx" (needs a 2.2.13 or later Linux kernel). ulimit -Hn 8192 # Execute the program. eval exec "$4" NOTES
This script is not meant as startup script for daemons or somesuch. It has nothing to do with a rc.local style script. It's just a handler for things executed from /etc/inittab. Experimenting with this can make your system un(re)bootable. FILES
/etc/inittab, /etc/initscript. AUTHOR
Miquel van Smoorenburg ,<miquels@cistron.nl> SEE ALSO
init(8), inittab(5). July 10, 2003 INITSCRIPT(5)
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