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This is the command alt_getopt that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator



alt_getopt - parse command options


cmds=`alt_getopt opt1 action1 [opt2 action2...] -- "$@"`
eval "$cmds"


alt_getopt is a command options parser. It conforms to POSIX and supports long options,
that is works the same way as getopt_long(3) found in *BSD and GNU libc.


The following shell script accepts the options: -v (or --verbose), -h (or --help), long
option --fake without short synonym, --len accepting argument, -o (or --output) accepting
argument, short options -f and -F without long synonyms etc. If option is applied,
appropriate shell command is executed.

help () { echo 'help here'; }

process_args (){
alt_getopt \
'v|verbose' 'verbose=1' \
'h help' help \
'fake' fake_flag=1 \
'=len' len= \
'=o output' output= \
'=m msg' "msg=" \
'V version' "echo 'alt_getopt-0-1-0'" \
f 'flag=1' \
F 'flag=' \
=n number= \
-- "$@"

cmds=`process_args "$@"`
eval "$cmds"

echo "flag=$flag"
echo "msg=$msg"

Another way to handle options using alt_getopt.sh

. alt_getopt.sh

help () {
cat 1>&2 <<EOF
demo_alt_getopt2.sh is a demo program for alt_getopt.sh

# the third argument in add_arg function envocation is optional
add_arg 'h help' 'help; exit 0' \
' -h|--help display this help'
add_arg 'v|version' "echo 'demo_alt_getopt2.sh 0.1.0'" \
' -v|--version display version'
add_arg '=o|output' "output=" \
' -o|--output output file'

process_args "$@"
shift "$shifts"

echo "output=$output"



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