getopt/trunk/getopt-parse.bash

#!/bin/bash

# A small example program for using the new getopt(1) program.
# This program will only work with bash(1)
# An similar program using the tcsh(1) script language can be found
# as parse.tcsh

# Example input and output (from the bash prompt):
# ./parse.bash -a par1 'another arg' --c-long 'wow!*\?' -cmore -b " very long "
# Option a
# Option c, no argument
# Option c, argument `more'
# Option b, argument ` very long '
# Remaining arguments:
# --> `par1'
# --> `another arg'
# --> `wow!*\?'

# Note that we use `"$@"' to let each command-line parameter expand to a 
# separate word. The quotes around `$@' are essential!
# We need TEMP as the `eval set --' would nuke the return value of getopt.
TEMP=`getopt -o ab:c:: --long a-long,b-long:,c-long:: \
     -n 'example.bash' -- "$@"`

if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
        case "$1" in
                -a|--a-long) echo "Option a" ; shift ;;
                -b|--b-long) echo "Option b, argument \`$2'" ; shift 2 ;;
                -c|--c-long) 
                        # c has an optional argument. As we are in quoted mode,
                        # an empty parameter will be generated if its optional
                        # argument is not found.
                        case "$2" in
                                "") echo "Option c, no argument"; shift 2 ;;
                                *)  echo "Option c, argument \`$2'" ; shift 2 ;;
                        esac ;;
                --) shift ; break ;;
                *) echo "Internal error!" ; exit 1 ;;
        esac
done
echo "Remaining arguments:"
for arg do echo '--> '"\`$arg'" ; done
1	#!/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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