Or if you want to stick with /usr/bin/sh, this should work:
Code:
#!/usr/bin/sh
while true
do
clear
echo "\n REAL TIME MONITOR - QCHECK"
echo "=======================\n"
qcheck
sleep 3
done
The trick is "while true"... It basically says that any time the "true" command returns true (always), do the following. Another common way of looking like that is to say "while :" - the ":" command will always return true also.
Hi,
I'm pretty new to UNIX shell scripting and need some help. We have an Informatica interface that dumps any files that have errors into a directory. I need to check that directory periodically for any of up to 9 files that might be in it and run a specific process for each file found. The... (3 Replies)
Hi,
PHP user here. I'm using an endless loop to perform to mimic a cron. The script does something every 20 minutes. It sleep()s in the meantime.
I have various checks that ensure that only instance can run, including a "gentleman agreement" locked file.
However, I'd like to make sure... (2 Replies)
When finding a string in files within a directory, one can use this:
grep -r "searchstring" dir/subdir/ > listofoccurrences.txt
For brevity sake one can enter the intended directory and use this:
grep -r "searchstring" . > listofoccurrences.txt
which as I found out leads to an endless loop,... (2 Replies)
Dear experts,
I have done a re-installation of sco unix openserver 5.0.5 and managed to create users. The problem am facing is that of one user logging in more than 5 times. How can i overcome this problem. the system give the error below.
-sh: fork failed - too many processes in sco unix... (5 Replies)
Hi all.
I wrote a program with the Motif Widget Toolkit. It has a
button and a scrollbar. When the user hits the button the
callback creates a new fork() thread. The new thread sleeps
for a while and then changes the position of the scrollbar.
It does this in an endless loop.
I need the... (2 Replies)
First time post. I did a search so I didn’t see this specific issue. It seems to be a head scratcher for me.
I have an hourly job that on rare occasions, gets into an endless loop.
I’ve tried different scenarios but the current version does basically the following.
Find all the *.arc files and... (18 Replies)
Hi All,
I've written a script to read 2 files and compare the contents using while loop but somehow when $line is not found in test2, the script will continue looping.
Below is my code, pls advise what could went wrong
TIA
Nick
for line in test1.txt | while read line
do
grep -i... (4 Replies)
Hello,
I am running Oracle Database and after a while I keep getting this message whenever I execute any command.
I cannot execute any command even shutdown, whenever I execute any command , I get this message
/usr/bin/ksh: 0403-031 The fork function failed. There is not enough memory... (7 Replies)
Hi,
AM very new to shell scripting and try to run a simple do while loop statement, but it ends up running endlessly. please can anyone assist, dunno what am doing wrong, any useful suggestions will be welcomed.
#!/bin/ksh
### To check a running process instance
#################... (5 Replies)
I was practicing writing simple loops as I am a new bash user and I created this script, which turned out to be an endless loop where the echo output does not stop and I do not see where my mistake is.
#!/bin/bash
echo 'enter a number from 1 to 100'
read number
while
do
... (2 Replies)
Discussion started by: goldenlinx
2 Replies
LEARN ABOUT OSF1
true
true(1) General Commands Manual true(1)NAME
true, false - Returns a standard exit value
SYNOPSIS
true
false
STANDARDS
Interfaces documented on this reference page conform to industry standards as follows:
true: XCU5.0
false: XCU5.0
Refer to the standards(5) reference page for more information about industry standards and associated tags.
DESCRIPTION
The true command returns a 0 (zero) exit value. The false command returns a nonzero exit value. These commands are usually used in input to
shell commands.
NOTES
The special built-in utility : (colon) is sometimes more efficient than the true command.
EXIT STATUS
[Tru64 UNIX] The nonzero value returned by the false command may vary from system to system.
EXAMPLES
To construct a loop in a shell procedure, enter: while true do date sleep 60 done
This procedure displays the date and time once a minute. To stop it, press the Interrupt key sequence.
SEE ALSO
Commands: csh(1), ksh(1), Bourne Shell sh(1b), POSIX shell sh(1p)
Standards: standards(5)true(1)