Help with Bash user input Post: 302511379

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1. Shell Programming and Scripting

Bash : how do i check the user input and make sure is only chracter or only number ?

Bash : how do i check the user input and make sure is only character or only number ?

2. Shell Programming and Scripting

BASH: Any Way to Get User Input Without Requiring Them to Hit the Enter Key?

I'm working on making a menu system on an HP-UX box with Bash on it. The old menu system presents the users with a standard text menu with numbers to make selections. I'm re-working the system and I would like to provide something more akin to iterative search in Emacs. I have a list of 28...

3. UNIX for Dummies Questions & Answers

BASH validate user input

Hey, im trying to validate a user input and need some help. The input needs to be just a single letter. Im using a case to so this eg: read answer case $answer in *) echo "OK" ;; *) echo "This is a number" read answer ;; *) echo...

4. Shell Programming and Scripting

BASH Varible nesting and user input

Well, I think I've managed to take two different issues and conglomerate them into and embarrasing mess. #!/bin/bash # Set some variables dir1=/path/that/isnt/variable/$variabledir/dir/ dir2=/path/that/isnt/variable/$variabledir/important/"$variabledir"-subdirectory/path/ echo "Gimme...

5. Shell Programming and Scripting

Bash Script verify user input is not empty and is equal to a value

I need to create a script that has a user enter a value. I want to verify that the value is either 1,2, or 3. If it is not then I want them to try entering it again. I am using a while loop to force them to retry. I am able to test the input against 1,2, and 3, but when I test agains an...

6. Shell Programming and Scripting

Bash user input

Hi all, I currently have a script which uses read -p for user interaction. e.g. read -p "New user? " user Is it possible to have it so if the user enters nothing and just presses return it can resort to a specified value instead? Thanks! :)

7. Shell Programming and Scripting

[bash] how is proper way to validate user input

hi all, i have a script that need user input provide all variables that needed to complete a job. this is my current script: echo "type file source and it full path :" read INPUTFILE if || ; then echo "ERROR: you didn't enter a file source or file source is not...

8. Shell Programming and Scripting

Using read to prompt for editable user input in Bash 3

Below is a simple script to prompt for user input while suggesting an editable default value at the prompt: shortname=user1 read -e -i $shortname -p "Please enter the username you would like to add: " input USERNAME="${input:-$shortname}" Please enter the username you would like to add:...

9. Shell Programming and Scripting

BASH - read does not wait for user input in some circumstances

Hello. I am running 2 scripts : script_1 and script_2 These scripts are run as root Script 2 contains : #!/bin/bash # # ~/bin/script_2 # E_BAD_PARAM=115 # date2stamp () { date --date "$1" +%Y-%m-%d___%H:%M:%S } # USER_NAME=$1 NB_PARAM=$# PARAM0=$0

10. Shell Programming and Scripting

Bash Question: HowTo Exit Script with User Input While Process is Running Mid-Loop?

Hi, I have written a script that allows me to repetitively play a music file $N times, which is specified through user input. However, if I want to exit the script before it has finished looping $N times, if I use CTRL+c, I have to CTRL+c however many times are left in order to complete the loop....

LEARN ABOUT XFREE86

ppmtopgm

ppmtopgm(1)						      General Commands Manual						       ppmtopgm(1)

NAME

       ppmtopgm - convert a portable pixmap into a portable graymap

SYNOPSIS

       ppmtopgm [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as  input.  Produces a portable graymap as output.  The output is a "black and white" rendering of the original
       image, as in a black and white photograph.  The quantization formula used is .299 r + .587 g + .114 b.

       Note that although there is a pgmtoppm program, it is not necessary for simple conversions from pgm to ppm , because any  ppm  program  can
       read  pgm  (and	pbm  ) files automatically.  pgmtoppm is for colorizing a pgm file.  Also, see ppmtorgb3 for a different way of converting
       color to gray.  And ppmdist generates a grayscale image from a color image, but in a way that makes it easy to differentiate  the  original
       colors, not necessarily a way that looks like a black and white photograph.

QUOTE

       Cold-hearted orb that rules the night
       Removes the colors from our sight
       Red is gray, and yellow white
       But we decide which is right
       And which is a quantization error.

SEE ALSO

       pgmtoppm(1),ppmtorgb3(1),rgb3toppm(1),ppmdist(1),ppm(5),pgm(5)

AUTHOR

       Copyright (C) 1989 by Jef Poskanzer.

								   10 April 2000						       ppmtopgm(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Bash : how do i check the user input and make sure is only chracter or only number ?

Discussion started by: CheeSen

2. Shell Programming and Scripting

BASH: Any Way to Get User Input Without Requiring Them to Hit the Enter Key?

Discussion started by: deckard

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BASH validate user input

Discussion started by: 602chrislys

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BASH Varible nesting and user input

Discussion started by: karlp