/[public]/getopt/trunk/getopt-parse.bash
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Annotation of /getopt/trunk/getopt-parse.bash

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Revision 259 - (hide annotations)
Mon Nov 7 22:09:10 2005 UTC (14 years, 9 months ago) by frodo
File size: 1500 byte(s)
Imported sources

1 frodo 259 #!/bin/bash
2    
3     # A small example program for using the new getopt(1) program.
4     # This program will only work with bash(1)
5     # An similar program using the tcsh(1) script language can be found
6     # as parse.tcsh
7    
8     # Example input and output (from the bash prompt):
9     # ./parse.bash -a par1 'another arg' --c-long 'wow!*\?' -cmore -b " very long "
10     # Option a
11     # Option c, no argument
12     # Option c, argument `more'
13     # Option b, argument ` very long '
14     # Remaining arguments:
15     # --> `par1'
16     # --> `another arg'
17     # --> `wow!*\?'
18    
19     # Note that we use `"$@"' to let each command-line parameter expand to a
20     # separate word. The quotes around `$@' are essential!
21     # We need TEMP as the `eval set --' would nuke the return value of getopt.
22     TEMP=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \
23     -n 'example.bash' -- "$@"`
24    
25     if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi
26    
27     # Note the quotes around `$TEMP': they are essential!
28     eval set -- "$TEMP"
29    
30     while true ; do
31     case "$1" in
32     -a|--a-long) echo "Option a" ; shift ;;
33     -b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;;
34     -c|--c-long)
35     # c has an optional argument. As we are in quoted mode,
36     # an empty parameter will be generated if its optional
37     # argument is not found.
38     case "$2" in
39     "") echo "Option c, no argument"; shift 2 ;;
40     *) echo "Option c, argument \`$2'" ; shift 2 ;;
41     esac ;;
42     --) shift ; break ;;
43     *) echo "Internal error!" ; exit 1 ;;
44     esac
45     done
46     echo "Remaining arguments:"
47     for arg do echo '--> '"\`$arg'" ; done

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