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Man Pages


Manual Reference Pages  -  ALT_GETOPT (1)

.ds Aq ’

NAME

alt_getopt - parse command options

CONTENTS

SYNOPSIS



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



DESCRIPTION

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.

EXAMPLES

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.



 #!/bin/sh
 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



  #!/bin/sh
  . alt_getopt.sh

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

  # 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"



HOME

<http://sourceforge.net/projects/runawk/>

SEE ALSO getopt(3) getopt_long(3)

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ALT_GETOPT (1) 2014-12-26

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