8 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
While going through some of the perl script...
I had found the below line..
use Getopt::Long;
my $GetOptionsReturnCode = GetOptions ( '<>' => sub { push(@unknownArg, @_); }, 'h|help' => sub { &helpMessage(); exit 0; }, );
Could anyone please explain the above one ... (1 Reply)
Discussion started by: scriptscript
1 Replies
2. Programming
Hi All
I am using Getopt::Long in perl and i am trying to have it so if i dont supply a switch after the progname is will do a defult option
i have the following
GetOptions($OPT,
'debug|d',
'mail|m',
) or info();
i want it run the debug if it is not given a switch
... (1 Reply)
Discussion started by: ab52
1 Replies
3. Programming
I am reading arguments passed to a C++ program which accepts long options.
Long options start with '--', with the value joined with the option by an = sign, with no intervening spaces.
An example is as follows:
programName --vdz=15.0
I want to store 'vdz' in variable 'key', whereas... (4 Replies)
Discussion started by: kristinu
4 Replies
4. Programming
My question is simple: When should I use a long, int, char, unsigned/signed variables??
When I declare a variable "unsigned;" what did I do it???
Why would I delcare an integer "long" or "short" ( unsigned or signed)??
Any examples of when things like "unsigned", "long", "short" etc...... (6 Replies)
Discussion started by: cpp_beginner
6 Replies
5. Shell Programming and Scripting
Hi there, I have an example basic script (below) and ive been trying to figure out how to stop multiple arguments to my options occuring. for example using the example script below I can issue two arguments for, say the --surname option and it will not barf at me (although thats what i want it to... (11 Replies)
Discussion started by: rethink
11 Replies
6. Shell Programming and Scripting
Hi ,
I am using getopt for both short and long options as below
SHORTOPTS="a:c"
LONGOPTS="alpha:,charlie"
OPTS=$(getopt -o $SHORTOPTS --longoptions $LONGOPTS -n "$progname" -- "$@")
eval set -- "$OPTS"
while ; do
case $1 in
-a|--alpha)
echo "-a or --alpha... (1 Reply)
Discussion started by: padmisri
1 Replies
7. Shell Programming and Scripting
Hi ,
I am using getopt for both short and long options as below
SHORTOPTS="a:c"
LONGOPTS="alpha:,charlie"
OPTS=$(getopt -o $SHORTOPTS --longoptions $LONGOPTS -n "$progname" -- "$@")
eval set -- "$OPTS"
while ; do
case $1 in
-a|--alpha)
echo "-a or --alpha... (1 Reply)
Discussion started by: padmisri
1 Replies
8. Shell Programming and Scripting
:)
Can anybody help me about how to use getopt in shell scripting. (3 Replies)
Discussion started by: darshakraut
3 Replies
getopt(1) General Commands Manual getopt(1)
NAME
getopt - parse command options
SYNOPSIS
optstring args
DESCRIPTION
is used to break up options in command lines for easy parsing by shell procedures and to check for legal options. optstring is a string of
recognized option letters (see getopt(3C)). If a letter is followed by a colon, the option is expected to have an argument, which may or
may not be separated from it by whitespace.
The positional parameters ...) of the shell are reset so that each option is preceded by a and is in its own positional parameter; each
option argument is also parsed into its own positional parameter.
recognizes two hyphens to delimit the end of the options. If absent, places at the end of the options.
The most common use of is in the shell's command (see the example below) where converts the command line to a more easily parsed form.
writes the modified command line to the standard output.
EXTERNAL INFLUENCES
Environment Variables
determines the language in which messages are displayed.
If is not specified in the environment or is set to the empty string, the value of is used as a default for each unspecified or empty vari-
able.
If is not specified or is set to the empty string, a default of "C" (see lang(5)) is used instead of If any internationalization variable
contains an invalid setting, behaves as if all internationalization variables are set to "C". See environ(5).
International Code Set Support
Single-byte and multibyte character code sets are supported.
DIAGNOSTICS
prints an error message on the standard error when it encounters an option letter that is not included in optstring.
EXAMPLES
The following code fragment processes the arguments for a command that can take the options or and the option which requires an argument:
This code accepts any of the following as equivalent:
WARNINGS
option arguments must not be null strings nor contain embedded blanks.
SEE ALSO
getopts(1), sh(1), getopt(3C).
getopt(1)
