03-29-2011
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a script which fires a command based on certain parameters. I am posting the code below..
The options needs be given such that
-u option goes along with -d and -s, -f goes with -d and -t goes with -s and -d.
1) How do I ensure that user misses any of the option then he should be... (5 Replies)
Discussion started by: yerra
5 Replies
2. Shell Programming and Scripting
hey
need help with getopts again.
i am using getopts to read my command line options and arguments. i can manage to do for options that have only one argument
e.g srcipt_name -f 3
i am able to use getopts to do this but i am having problems two accept more than two agruments
e.g.... (1 Reply)
Discussion started by: problems
1 Replies
3. Shell Programming and Scripting
Hi
i have part of the scripts below ,getopt for -h or ? not working for me.
can anybody tell me if this sytax right or wrong.
#!/usr/bin/ksh
program=$(basename $0)
#####################################################################################
function usageerr
{
RC=1
... (3 Replies)
Discussion started by: GrepMe
3 Replies
4. HP-UX
Is there a restriction on levels of using 'getopts' ? I have several scripts, each of which requires an option as the first parameter .
If I call one prg separately it works fine, but when one prg calls another prg and passes the option on the called prg, then the called prg
seems not to process... (3 Replies)
Discussion started by: vslewis
3 Replies
5. Shell Programming and Scripting
Hi,
I have a program where I want to use getopts.
I want to use "-i" option and then optionally supply arguments.
If user dosent supply arguments, then also it should work.
Please tell me how to proceed.
Here is some code, this is not right code btw but a sample to understand what I want to... (1 Reply)
Discussion started by: som.nitk
1 Replies
6. UNIX for Dummies Questions & Answers
Hey, i need help with the use of getopts in shell script.
tried reading a lot online, but found incomplete examples (maybe complete but cudn't make out). PLzz help...explain in deatil plzzz, i am a newbie:confused: (3 Replies)
Discussion started by: SasankaBITS
3 Replies
7. UNIX for Dummies Questions & Answers
Hi,
I am using below code to check files on ftp server and notify users if files are not arrived. I am invoking another script to send mail using smtpmail. Mail is being sent properly in first call to child script notify.sh ( i.e. in if condition ) but in second call ( i.e. in else part ) mail... (5 Replies)
Discussion started by: madhukalyan
5 Replies
8. Shell Programming and Scripting
Hi all...
I have been looking on here for the past few days for an answer and Im gonna have to break down and ask.
I just learned about the getopts command last week so have been trying to utilize it in my scripts.
Below, I am trying to set up a case structure for options using getopts.... (1 Reply)
Discussion started by: losingit
1 Replies
9. UNIX for Dummies Questions & Answers
while getopts v OPTION
do
case $OPTION in
v) echo "Hello" ;;
*) exit 1;;
esac
done
Suppose I have script tmp.sh
Whose Signature is tmp.sh <fixed_argument>
When I run the script with tmp.sh -v "file", it echoes a hello but, when I try the other way i.e, tmp.sh... (1 Reply)
Discussion started by: Devendra Hupri
1 Replies
10. Shell Programming and Scripting
Hi. Can somebody please show me an example of how to use getopts to assign a variable if it's been passed into the script but to set a default if no value has been passed in? And also how to handle a param with multiple values ... so a sub parse (can I use a function for this?)?
Here's my code... (1 Reply)
Discussion started by: user052009
1 Replies
LEARN ABOUT REDHAT
pbmreduce
pbmreduce(1) General Commands Manual pbmreduce(1)
NAME
pbmreduce - read a portable bitmap and reduce it N times
SYNOPSIS
pbmreduce [-floyd|-fs|-threshold ] [-value val] N [pbmfile]
DESCRIPTION
Reads a portable bitmap as input. Reduces it by a factor of N, and produces a portable bitmap as output.
pbmreduce duplicates a lot of the functionality of pgmtopbm; you could do something like pnmscale | pgmtopbm, but pbmreduce is a lot
faster.
pbmreduce can be used to "re-halftone" an image. Let's say you have a scanner that only produces black&white, not grayscale, and it does a
terrible job of halftoning (most b&w scanners fit this description). One way to fix the halftoning is to scan at the highest possible res-
olution, say 300 dpi, and then reduce by a factor of three or so using pbmreduce. You can even correct the brightness of an image, by
using the -value flag.
OPTIONS
By default, the halftoning after the reduction is done via boustrophedonic Floyd-Steinberg error diffusion; however, the -threshold flag
can be used to specify simple thresholding. This gives better results when reducing line drawings.
The -value flag alters the thresholding value for all quantizations. It should be a real number between 0 and 1. Above 0.5 means darker
images; below 0.5 means lighter.
All flags can be abbreviated to their shortest unique prefix.
SEE ALSO
pnmenlarge(1), pnmscale(1), pgmtopbm(1), pbm(5)
AUTHOR
Copyright (C) 1988 by Jef Poskanzer.
02 August 1989 pbmreduce(1)