10-23-2012
A part of my script is running conditionally ('if' statement), and I want to filter out (by means of 'grep -v') an expression from the whole block which can be a result of several commands.
But there might be a condition where I'd like to exit the script from inside the if-block. That could be achieved by 'kill $$' or something like that, but I'm looking for a "clean" solution - not resulting in any "Terminated" messages etc.
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
Hi,
I have a bash script which I have referenced in the rc.local of my fedora linux OS. However it doesnt respond the same as when run in terminal from fedora.
The bash script has a series of interactive questions that require user input as shown:
#!/bin/bash
echo "Do you want to use... (1 Reply)
Discussion started by: Crigamorfin
1 Replies
2. Shell Programming and Scripting
Hi everyone - just like to say great forum...I've learned a lot off here but I just can't figure this one out...(first post)
I'm writing a script to monitor a directory and email the latest modified file....(I realize there are better ways than I'm trying here...I don't like copying and pasting... (5 Replies)
Discussion started by: trevthefatty
5 Replies
3. Shell Programming and Scripting
I can't get any bash scripts to run in Terminal (Mac - Snow Leopard). I have the following super-simple script, and I can't get it to execute despite having the correct permissions (I think).
#!/bin/bash
echo "WORK... PLEASE?!"
I named the file 'testScript.sh', and I added execution... (6 Replies)
Discussion started by: compulsiveguile
6 Replies
4. Shell Programming and Scripting
I am making of a script that will go through a couple of for loops and create file names based on the values in that loop, however the variable that combines everything is not getting assigned properly:
#! /bin/bash
for imod in K33_j1b_WS9_6
do
for emod in mb2A mb2C mb3A mb3C mb4A... (1 Reply)
Discussion started by: badinsults
1 Replies
5. Shell Programming and Scripting
Hello,
I am not sure, where I am missing in the scirpt, I am trying to grep few users from /etc/passwd file and if exists, I added line to echo as user exist, if not create it.
#!/bin/bash
for vid in v707 z307 z496 z163 z292 ; do
if
then
echo " $vid User exists "
else
... (2 Replies)
Discussion started by: bobby320
2 Replies
6. Shell Programming and Scripting
Hi all,
Am trying to convert a script from ksh to bash :wall:. One of the sub is something like below:
#!/bin/bash
declare -a array01
step_01_test()
{
local count=0
ps -ef | grep watch | grep -v grep | awk '{ print $8 }' | while read line
do
let count=${count}+1
... (1 Reply)
Discussion started by: newbie_01
1 Replies
7. Shell Programming and Scripting
In a bash script I have:
LSCMD="find /project/media/ -mindepth 2 -maxdepth 2 -name \"files*pkg\""
ALL_PACKAGES=$( $LSCMD | sort 2>/dev/null)
But I get nothing returned. It's just all blank. If I run the find command in a terminal, I get dozens of hits.
I figure it's the way how I'm... (3 Replies)
Discussion started by: superbbrr
3 Replies
8. UNIX for Beginners Questions & Answers
Repeat this text in a file named notes.txt and run the script
Before bash is a good language a blank line appears
Also, the following notes are displayed incorrectly
What is bad?
==================================
Title : Note 1
==================================
Category: Computer
Date... (3 Replies)
Discussion started by: cesar60
3 Replies
9. UNIX for Beginners Questions & Answers
Can anyone offer any advice on how to modify the script below to work on a new system we have, that has no graphics capability? We admin the system through a serial RAS device. I've tried running the below script through the RAS and through an ssh -X session. It failed with something like "GTK... (3 Replies)
Discussion started by: yelirt5
3 Replies
10. UNIX for Beginners Questions & Answers
Hi Guys,
I wrote a collection of bash functions years ago and now need to use them again but
I'm getting some error messages when eval tries to expand the variables names.
I recollect that I used the shopt command to set one of the options but I can't quite
remember the command that I... (8 Replies)
Discussion started by: ASGR
8 Replies
LEARN ABOUT OPENDARWIN
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________
NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________
DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)