How to declare the two argument for optional switch ?
I have a script that search for a string in current or old zipped log file.
Im using a option something like this
Since $1 can have only one argument should be passed when user select swicth -c and -o need to have mandatory two arguments YYYY-mm-dd & OLD_FILE_NAME in case of -o switch.
Can we have this method ?? please suggest. Thanks in advance
Hi,
I am trying to call a function inside a shell script. Is there a way in which I can make the parameters options in the call?
Please help me with this.
Thanks!!! (2 Replies)
field 12345 12345
field 12345
field 12345 123456
last fleld (from three) is optional, but if it occures It has to be composed only of nummbers and maximum 5 positions long.
If I use:
grep "^field \{5\}"
I get:
field 12345 12345
field 12345
field 12345 123456
But I wont... (11 Replies)
Hello,
I have a shell script "Test.ksh" and I need to pass 8 parameters/arguments while executing the script
./Test.ksh 1 2 3 4 5 6 7 8
Out of these I want first 3 to be compulsory and rest 5 to be optional. Can you suggest the way to do this like and also how to pass these optional... (3 Replies)
I have a switch statement, and I want to have two options performing the same thing. For example, if $opt matches "-fb" or "--fbase", I want to perform the same operation. How can I include various matches in "case" ?
switch ($opt)
case "-T":
set Atpath = $par
set opt_tpath =... (8 Replies)
I have an awk script which can be used in the following ways:
xi and xf will only be mandatory when processing the file fin.zc.
awk -v xi=0/-0.5 -v xf=80/30 -f ./zc2cmd.awk fin.zc > fout.cmod
awk -f ./zc2cmd.awk -u
awk -f ./zc2cmd.awk --usg
awk -f ./zc2cmd.awk -e
awk -f ./zc2cmd.awk... (1 Reply)
Here is my script:
#!/bin/ksh
usage ()
{
echo " Usage: $0 <opt1> <opt2> <opt3> <opt4>"
}
if ; then
usage
exit;
fi
prog -a $1 -b $2 -c $3 -d $4 2>&1 | tee -a ~/$1.log
I want argument 4 to be optional, so if there's no argument for opt4, that it doesn't... (8 Replies)
Hi
Am pretty new to C..
Am trying to pass the arguments from command line and use them in switch case statement..
i have tried the following
#include <stdlib.h>
main(int argc, char* argv)
{
int num=0;
if ( argc == 2 )
num = argv;
printf("%d is the num value",num);
switch ( num )
... (2 Replies)
Please forgive but I am new to Linux and still learning. When installing Linux (any flavor) over PXE, it asks if you want to customize which packages to install. Most engineers ask us to install all packages but this entails A LOT of clicking. Is there a way to "select all" packages by using a... (3 Replies)
Hi Unix Gurus,
i am on learning path of unix, and yet to discover many things. I came across with this requirement where i need to pass parameters but the position of parameters is not fixed so after doing some google search got to know "getopts" can handle that. So here is my code:
function... (3 Replies)
Discussion started by: gnnsprapa
3 Replies
LEARN ABOUT DEBIAN
getopt::std
Getopt::Std(3perl) Perl Programmers Reference Guide Getopt::Std(3perl)NAME
getopt, getopts - Process single-character switches with switch clustering
SYNOPSIS
use Getopt::Std;
getopt('oDI'); # -o, -D & -I take arg. Sets $opt_* as a side effect.
getopt('oDI', \%opts); # -o, -D & -I take arg. Values in %opts
getopts('oif:'); # -o & -i are boolean flags, -f takes an argument
# Sets $opt_* as a side effect.
getopts('oif:', \%opts); # options as above. Values in %opts
DESCRIPTION
The getopt() function processes single-character switches with switch clustering. Pass one argument which is a string containing all
switches that take an argument. For each switch found, sets $opt_x (where x is the switch name) to the value of the argument if an
argument is expected, or 1 otherwise. Switches which take an argument don't care whether there is a space between the switch and the
argument.
The getopts() function is similar, but you should pass to it the list of all switches to be recognized. If unspecified switches are found
on the command-line, the user will be warned that an unknown option was given. The getopts() function returns true unless an invalid
option was found.
Note that, if your code is running under the recommended "use strict 'vars'" pragma, you will need to declare these package variables with
"our":
our($opt_x, $opt_y);
For those of you who don't like additional global variables being created, getopt() and getopts() will also accept a hash reference as an
optional second argument. Hash keys will be x (where x is the switch name) with key values the value of the argument or 1 if no argument
is specified.
To allow programs to process arguments that look like switches, but aren't, both functions will stop processing switches when they see the
argument "--". The "--" will be removed from @ARGV.
"--help" and "--version"
If "-" is not a recognized switch letter, getopts() supports arguments "--help" and "--version". If "main::HELP_MESSAGE()" and/or
"main::VERSION_MESSAGE()" are defined, they are called; the arguments are the output file handle, the name of option-processing package,
its version, and the switches string. If the subroutines are not defined, an attempt is made to generate intelligent messages; for best
results, define $main::VERSION.
If embedded documentation (in pod format, see perlpod) is detected in the script, "--help" will also show how to access the documentation.
Note that due to excessive paranoia, if $Getopt::Std::STANDARD_HELP_VERSION isn't true (the default is false), then the messages are
printed on STDERR, and the processing continues after the messages are printed. This being the opposite of the standard-conforming
behaviour, it is strongly recommended to set $Getopt::Std::STANDARD_HELP_VERSION to true.
One can change the output file handle of the messages by setting $Getopt::Std::OUTPUT_HELP_VERSION. One can print the messages of "--help"
(without the "Usage:" line) and "--version" by calling functions help_mess() and version_mess() with the switches string as an argument.
perl v5.14.2 2010-12-30 Getopt::Std(3perl)