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Full Discussion: argument count
Top Forums Shell Programming and Scripting argument count Post 302347098 by KenJackson on Monday 24th of August 2009 11:52:26 PM
Old 08-25-2009
Maybe you want something like this:
Code:
#!/bin/sh
NAME= NUMBER=
while $# -gt 0; do
    if echo $1 | grep -qv '[^0-9-]'; then
        # $1 contains only digits and dashes
        test -n "$NUMBER"  &&  { echo "Too many numbers"; exit 1; }
        NUMBER=$1
    else
        test -n "$NAME"  &&  { echo "Too many names"; exit 1; }
        NAME="$1"
    fi
    shift
done

# Now process $NAME and $NUMBER if they aren't blank

I think grep -qv '[^0-9-]' is clever.
It quietly returns true if the value piped in does not contain any characters that are not digits or hyphens.
That is, if true, it only contains those characters.


-------------
Oops. I for forgot the brackets. The 'while' line should be:
while [ $# -gt 0 ]; do
or
while test $# -gt 0; do
Last edited by KenJackson; 08-27-2009 at 08:11 AM..
 

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LEARN ABOUT LINUX

ping6

PING6(1)                                                           User Commands                                                          PING6(1)

NAME

       ping6 - Packets to network hosts

SYNOPSIS

       ping6 [OPTION...] HOST ...

DESCRIPTION

       Send ICMP ECHO_REQUEST packets to network hosts.

              Options valid for all request types:

       -c, --count=NUMBER
              stop after sending NUMBER packets

       -d, --debug
              set the SO_DEBUG option

       -i, --interval=NUMBER
              wait NUMBER seconds between sending each packet

       -n, --numeric
              do not resolve host addresses

       -r, --ignore-routing
              send directly to a host on an attached network

       -w, --timeout=N
              stop after N seconds

              Options valid for --echo requests:

       -f, --flood
              flood ping (root only)

       -l, --preload=NUMBER
              send NUMBER packets as fast as possible before falling into normal mode of behavior (root only)

       -p, --pattern=PATTERN
              fill ICMP packet with given pattern (hex)

       -q, --quiet
              quiet output

       -s, --size=NUMBER
              send NUMBER data octets

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

       Options marked with (root only) are available only to superuser.

AUTHOR

       Written by Jeroen Dekkers.

REPORTING BUGS

       Report bugs to <bug-inetutils@gnu.org>.

COPYRIGHT

       Copyright (C) 2011 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       The  full  documentation  for ping6 is maintained as a Texinfo manual.  If the info and ping6 programs are properly installed at your site,
       the command

              info ping6

       should give you access to the complete manual.

GNU inetutils 1.9                                                  December 2011                                                          PING6(1)
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