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Full Discussion: Custom exit message according to flag
Top Forums Shell Programming and Scripting Custom exit message according to flag Post 303045136 by da1 on Thursday 12th of March 2020 12:39:24 PM
Old 03-12-2020
Custom exit message according to flag
Hello everyone,

I'm currently working on a script that uses curl's to check internet connectivity with and without a proxy being specified.
Basically what I'd like to achieve is having the script output fail or success according to the "method" used (direct or via proxy).

A very ugly way of doing it:
Code:
 # "curl_args" contains "-x $2" and gets set if $2 exists
curl ${curl_args} "$1" &> /dev/null

if [ $? == 0 ]; then
   if [ "$#" == 1 ]; then
      printf "OK - able to connect to $1\n"
      exit 0
   elif [ "$#" == 2 ]; then
      printf "OK - able to connect to $1 from $2\n"
      exit 0
   fi
else
   if [ "$#" == 1 ]; then
      printf "CRITICAL - unable to connect to $1\n"
      exit 1
   elif [ "$#" == 2 ]; then
      printf "CRITICAL - unable to connect to $1 from $2\n"
      exit 1
   fi

The script expects 2x arguments. The first one is the URL and the second one is the proxy address.

Whats a more dynamic way of writing that ugly if statement?
 

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LEARN ABOUT DEBIAN

pppoe-connect

PPPOE-CONNECT(8)					      System Manager's Manual						  PPPOE-CONNECT(8)

NAME

       pppoe-connect - Shell script to manage a PPPoE link

SYNOPSIS

       pppoe-connect [config_file]

       pppoe-connect interface user [config_file]

DESCRIPTION

       pppoe-connect  is  a  shell  script  which  manages a PPPoE connection using the Roaring Penguin user-space PPPoE client.  If you omit con-
       fig_file, the default file /etc/ppp/pppoe.conf is used.	If you supply interface and user, then they override the  Ethernet  interface  and
       user-name settings in the configuration file.

       Note that normally, you should not invoke pppoe-connect directly.  Instead, use pppoe-start to bring up the PPPoE connection.

       pppoe-connect  first  reads a configuration file.  It then brings up a PPPoE connection.  If the connection ever drops, a message is logged
       to syslog, and pppoe-connect re-establishes the connection.  In addition, each time the connection is dropped  or  cannot  be  established,
       pppoe-connect executes the script /etc/ppp/pppoe-lost if it exists and is executable.

       The shell script pppoe-stop causes pppoe-connect to break out of its loop, bring the connection down, and exit.

TECHNICAL DETAILS

       pppoe-connect uses the following shell variables from the configuration file:

       ETH    The Ethernet interface connected to the DSL modem (for example, eth0).

       USER   The PPPoE user-id (for example, b1xxnxnx@sympatico.ca).

       PIDFILE
	      A file in which to write the process-ID of the pppoe-connect process (for example, /var/run/pppoe.pid).  Two additional files ($PID-
	      FILE.pppd and $PIDFILE.pppoe) hold the process-ID's of the pppd and pppoe processes, respectively.

       By using different configuration files with different PIDFILE settings, you can manage multiple PPPoE connections.  Just specify  the  con-
       figuration file as an argument to pppoe-start and pppoe-stop.

AUTHOR

       pppoe-connect was written by David F. Skoll <dfs@roaringpenguin.com>.

       The pppoe home page is http://www.roaringpenguin.com/pppoe/.

SEE ALSO

       pppoe(8),  pppoe-start(8),  pppoe-stop(8), pppd(8), pppoe.conf(5), pppoe-setup(8), pppoe-status(8), pppoe-sniff(8), pppoe-server(8), pppoe-
       relay(8)

4th Berkeley Distribution					 21 February 2000						  PPPOE-CONNECT(8)
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