tree fcb6db30a59f9d5153f8c33707507bd68524b625
parent 23b1b808f1ce65b8aec3095b52e0bc3946cde4bb
author Pablo Neira Ayuso <pablo@gnumonks.org> 1302532383 +0200
committer Harald Welte <laforge@gnumonks.org> 1302637847 +0200

ipaccess-proxy: more robust option parsing and checking

With this patch, ipaccess-proxy makes more robust option checking:

$ ./ipaccess-proxy -l 1.1.1.1 -b 2.2.2.2 -e
ERROR: missing mandatory argument for `-e' option

And we return to shell to enforce the user to try again with the
appropriate invocation.

Before this patch, the default getopt_long() error handling was
enabled which displayed this message:

./ipaccess-proxy: option requires an argument -- 'e'

and ipaccess-proxy continued working.

This is generic enough to cover other option that require mandatory
arguments like `--bsc' and `--listen'.