Visit Our UNIX and Linux User Community


KSH if statement


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting KSH if statement
# 1  
Old 10-08-2009
KSH if statement

Hi guys,

im new to UNIX so bear with me.

would it be possible for me to create an if statement where i can have a key being entered and something happening after that. (bad explanation)

eg. If user enters letter 'q' then
close window or exit puTTy

Thanks in advance
# 2  
Old 10-08-2009
Sure you can. I recommend to start reading something like this:
Linux Shell Scripting Tutorial - A Beginner's handbook
or
BASH Programming - Introduction HOW-TO

Example to start with:
Code:
#!/usr/bin/ksh

echo "Enter a q and hit enter:"

read INPUT
if [[ "${INPUT}" == "q" ]]; then
     echo "You made it!"
     exit 0
else
     echo "Close but not correct."
     exit 1
fi

Sometimes it comes more handy to use case/esac.
Start reading the links I posted so you can have a start and ask if you get stuck.
Just in case: Homework or Classroom stuff may only be posted in the special subforum for it. Check the The UNIX and Linux Forums - Forum Rules to see what I mean Smilie

Previous Thread | Next Thread
Test Your Knowledge in Computers #796
Difficulty: Medium
Fractions in binary arithmetic terminate only if 2 is the only prime factor in the denominator.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

If Not Diff statement in ksh 88

Hi I tried the below code where it is working properly #!/bin/ksh set -x date1_data=abc.txt date2_data=bcd.txt if diff $date1_data $date2_data >/dev/null ; then echo "Equal" else echo "Not Equal" fi Then I tried like below where i want to use only if fi not else part ... (3 Replies)
Discussion started by: smile689
3 Replies

2. Shell Programming and Scripting

KSH If statement.

How can I search get if to pinpoint 1 word in a line and have it do something for me? example: KEY1="<< Response ... Total of 2 >> Sun Jun 19 15:30:18 2011 Tx Power Level is 27.7 Bm ~ " if ]; then command; else error; fi Thats just a quick sample. I want my if statement to se the... (5 Replies)
Discussion started by: 82280zx
5 Replies

3. Shell Programming and Scripting

If statement is not working in KSH

#! /bin/ksh rm -f ./xyz file --- this line is working // Below any if stmt is not working. if then echo " blah blah " fi or I replaced above if with if then echo "dir exists" fi This is also not working. I am new to KSH. So can someone help why if stmt is not... (31 Replies)
Discussion started by: saggy9583
31 Replies

4. Shell Programming and Scripting

ksh case statement

I am trying to write a ksh script using the case statement to select certain directories to remove. The directories that I am looking for are in the following format 2008-10-10. I want to exclude all other files/directories that contain anything other the 4 digit year,a dash, 2 digit month, a... (2 Replies)
Discussion started by: dgilc
2 Replies

5. UNIX for Dummies Questions & Answers

foreach statement in ksh

Hi, My script should run through all subdirs recursively in SUBDIR_LIST, run a clearcase command in each subdir, print to the merge_results1.txt and add a new line to the results before going to the next subdir. All the results should append to merge_results1.txt, but are seperated by a line so... (8 Replies)
Discussion started by: asulli01
8 Replies

6. Shell Programming and Scripting

how to use if statement in ksh script

Hi, I need to compare two variables using if condition and i am not sure if am right or wrong. My code is like : if then echo "new file" else echo "old file and remove it" fi where both variables contain time : filetime contains the time when a file... (2 Replies)
Discussion started by: manmeet
2 Replies

7. UNIX for Dummies Questions & Answers

Ksh Why Won't IF Statement work?

I'm trying to figure out why this if statement won't work: if || $zipcount != 6 ]] then echo ${myline} echo "ZIPCODE WARNING! ${zipcode} ${zipcount}" fi if ]] then echo ${myline} echo "STATE WARNING!... (3 Replies)
Discussion started by: developncode
3 Replies

8. Shell Programming and Scripting

Help with if statement in ksh script

I need a way to grep for a string in a file and if it finds it, to print set a variable to "Yes", if it doesn't find the string in a file to set the variable to "No". I plan on using these variables to print a table that lists whether the string was found or not. For example print "File ... (2 Replies)
Discussion started by: stepnkev
2 Replies

9. UNIX for Dummies Questions & Answers

Let statement in ksh HELP

I have: datafile contains 1234567890 >wc -c datafile | awk '{print $1}' >11 The program #!/bin/ksh let n = (wc -c datafile | awk '{print $1}') echo $n I expect n to be 11 but it gives error message. What is wrong with this statement? Thanks! (3 Replies)
Discussion started by: bobo
3 Replies

10. UNIX for Dummies Questions & Answers

if statement in ksh

what is the problem with this comparison in ksh script: if " ] it gives syntx error (3 Replies)
Discussion started by: gfhgfnhhn
3 Replies

Featured Tech Videos