diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:42:50 +0000 |
commit | 8cb83eee5a58b1fad74c34094ce3afb9e430b5a4 (patch) | |
tree | a9b2e7baeca1be40eb734371e3c8b11b02294497 /misc-utils/getopt-parse.tcsh | |
parent | Initial commit. (diff) | |
download | util-linux-8cb83eee5a58b1fad74c34094ce3afb9e430b5a4.tar.xz util-linux-8cb83eee5a58b1fad74c34094ce3afb9e430b5a4.zip |
Adding upstream version 2.33.1.upstream/2.33.1upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'misc-utils/getopt-parse.tcsh')
-rw-r--r-- | misc-utils/getopt-parse.tcsh | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/misc-utils/getopt-parse.tcsh b/misc-utils/getopt-parse.tcsh new file mode 100644 index 0000000..032d7ac --- /dev/null +++ b/misc-utils/getopt-parse.tcsh @@ -0,0 +1,77 @@ +#!/bin/tcsh + +# A small example script for using the getopt(1) program. +# This script will only work with tcsh(1). +# A similar script using the bash(1) language can be found +# as getopt-parse.bash. + +# Example input and output (from the tcsh prompt): +# ./parse.tcsh -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 had to escape the exclamation mark in the wow-argument. This +# is _not_ a problem with getopt, but with the tcsh command parsing. If you +# would give the same line from the bash prompt (ie. call ./parse.tcsh), +# you could remove the exclamation mark. + +# This is a bit tricky. We use a temp variable, to be able to check the +# return value of getopt (eval nukes it). argv contains the command arguments +# as a list. The ':q` copies that list without doing any substitutions: +# each element of argv becomes a separate argument for getopt. The braces +# are needed because the result is also a list. +set temp=(`getopt -s tcsh -o ab:c:: --long a-long,b-long:,c-long:: -- $argv:q`) +if ($? != 0) then + echo "Terminating..." >/dev/stderr + exit 1 +endif + +# Now we do the eval part. As the result is a list, we need braces. But they +# must be quoted, because they must be evaluated when the eval is called. +# The 'q` stops doing any silly substitutions. +eval set argv=\($temp:q\) + +while (1) + switch($1:q) + case -a: + case --a-long: + echo "Option a" ; shift + breaksw; + case -b: + case --b-long: + echo "Option b, argument "\`$2:q\' ; shift ; shift + breaksw + case -c: + case --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. + + if ($2:q == "") then + echo "Option c, no argument" + else + echo "Option c, argument "\`$2:q\' + endif + shift; shift + breaksw + case --: + shift + break + default: + echo "Internal error!" ; exit 1 + endsw +end + +echo "Remaining arguments:" +# foreach el ($argv:q) created problems for some tcsh-versions (at least +# 6.02). So we use another shift-loop here: +while ($#argv > 0) + echo '--> '\`$1:q\' + shift +end |