I am working on a script that lists files in a directory with a few file attributes depending on what option the user specifies at the command prompt. The script uses Getopt::Std and takes two switches.
The first switch allows the user to specify a directory, the second switch gives a long listing of the specified directory. For the most part, the switches work, and I get the required output, but if either switch is used and no argument is given, I need the script to use the current directory for the script. I am not sure how to specify that in the code.
I am using a regular IF statment now, just looking for tips on how to implement what I need.
Hi
I want both standard output and standard error of my command cmd to go to the same file log.txt. please let me know the best commandline to do this.
Thanks (2 Replies)
Hello all
Im using CC: Sun C++ 5.6 2004/07/15 and using the -library=stlport4 when linkning im getting
The fallowing error :
Undefined first referenced
symbol in file
std::ostream &std::ostream::operator<<(std::ios_base&(*)(std::ios_base&))... (0 Replies)
i have a teat file having data like
one 12/3
two 23/09
three 12/12
now from another script i want to read one line at a time ,cut field one and two in two separate variable ,compare field1 with another variable
but outside the loop .If i found a match i want to take from user the value... (2 Replies)
Hi,
I use the following command
make all > output-`date +%F-%H-%M-%S`.txt 2>&1
to invoke a MAKE process that takes some weeks to complete. The ouput is redirected to a text file. Now I prefix the above command with time to get time needed for completion of the MAKE process
time make... (2 Replies)
Hello Friends,
Can some one help me how to redirect output of a file to both a file and std output? All the help would be greatly appreciated.
Regards
Sridhar (1 Reply)
hello every one ,
this is my first participation in the forum , I hope it'll be a good start
within a script I would like to put some code to read i\p from standard i\p using read command if it reads Y it will terminate the script if it reads N it will continue execution , if no i\p is... (2 Replies)
Hi,
I'm having trouble compling the following code in Sun C++ (under sun studio 10). I found that it is issue with libCstd library. It can be resolved if i used stdport lib. However, i have no choice but to use libCstd. Does anyone know what can be done to resolve the issue? :confused:
... (0 Replies)
Hi guys, i have a new problem, even in scripting on KSH.
Given a string by standard INPUT (keyboard), i need to replace each character i print with this one '#' .
It's to camouflage password while digiting on command line.
For example:
----------------------------------
prompt$ ... (3 Replies)
Hello gurus, this is part of my script:
ls -1 ${MyFile} >> ${dir_log}ListFile${Now}.tmp
FILENUM=`cat ${dir_log}ListFile${Now}.tmp| wc -l | awk '{print $1}'`>> /dev/null
if
then
writeError "ERRORE: no file in directory for type ${FileName}!" >> ${LogFileName}
Close 1
fi... (7 Replies)
I have a program that scans and updates its results to std out every second. I would like to capture its output for further processing, but there is a catch. I would like to capture a snapshot after about 15 seconds as the results become more accurate and close the program.
Obviously I can simply... (4 Replies)
Discussion started by: Riker1204
4 Replies
LEARN ABOUT OSX
getopt::std
Getopt::Std(3pm) Perl Programmers Reference Guide Getopt::Std(3pm)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 v5.16.2 2012-10-11 Getopt::Std(3pm)