1. The problem statement, all variables and given/known data:
My problem is an infinite loop when i press any other key other then Y or y in the while loop. what i want it to do is return to the normal script outside of it if pressing N or n or keep asking the same question if its any other button. Perhaps my knowledge and understanding of loops is inaccurate. But i have made it very similar to the lecture shown ones and it isnt working out very well. Thanks in advance.
2. Relevant commands, code, scripts, algorithms:
P.S. I am using cygwin in windows to do this script.
3. The attempts at a solution (include all code and scripts):
Code:
"4")
clear
echo Would you like to exit? [y/n]?
read answer
while [ "$answer" != "Y" ] || [ "$answer" != "y" ]; do
case "$answer" in
"Y" | "y") clear; exit ;;
"N" | "n")
echo Press enter to continue
read a ;;
*)
echo Invalid input
echo Press enter to continue...
read a
;;
esac
if [ $answer != "Y" ] || [ "$answer" != "y" ]; then
echo "Press enter to continue..."
read A
fi
done
;;
4. Insearch: (University of Technology Sydney), Sydney NSW, Australia, James Hu (web systems), www(dot)insearch.edu.au/default.aspx?ArticleID=430
Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).
Hi,
whenever I am giving a 'ls' command system is going into infinite loop displaying the current home directory.
There is no separate shell script/file with ls name anywhere in the system.
I am using Solaris 10.
Any help / guidance in solving this problem is highly appreciated.
... (3 Replies)
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... (5 Replies)
hi all,
this is how my scrip looks like
#!/bin/sh
bindir='/opt/apps/script/bin'
datadir='/opt/apps/script/data'
dir='/opt/apps/script'
while : ; do
ls -1rt /opt/apps/script/data/check.txt*|tail -1 > /dev/null 2>&1
if ;then
chmod +rwx $bindir/dummy2.sh
... (8 Replies)
I wanted to copy (not forward but copy) all incoming email to another address of mine. It worked, but now I encountered an infinite loop problem: When the second address doesn't like the content and bounces the message back, the bounce message will be sent back and forth.
So, what I have in... (1 Reply)
Hi All,
I need to run an infinite loop.
requirement below:
function1 --> creates a file file1
function2 ---> need to call if the file creates
i am running these both function via a script --> script.sh
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Hi, I was debating if I should put this in the dummies or scripts section, I apologize in advance if I chose poorly.
Fairly new to Unix and BASH scripting but I thought I made it fairly well given my limited understanding. However, the output indicates that it's looping and I'm ending up with a... (5 Replies)
Im unable to stop the below infinite loop (bash script). Can someone tell me why this isnt responding to signals eg: ctrl+c (SIGINT) or ctrl+z
c=0
test_loop() {
c=$(($c+1))
echo "count value is : $c "
sleep 1
test_loop
}
Im using: SunOS 5.10
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I have a script script.shwhich is scheduled to run at 11 AM everyday.
# script.sh Code:
./scb_script.sh &
unfortunately scb_script.sh is running today in infinite loop as respective files are not available.
My question, when script.sh starts running tomorrow, will the old process be... (1 Reply)
Discussion started by: JSKOBS
1 Replies
LEARN ABOUT DEBIAN
rrdp
RRDp(3pm) User Contributed Perl Documentation RRDp(3pm)NAME
RRDp - Attach RRDtool from within a perl script via a set of pipes;
SYNOPSIS
use RRDp
RRDp::start path to RRDtool executable
RRDp::cmd rrdtool commandline
$answer = RRD::read
$status = RRD::end
$RRDp::user, $RRDp::sys, $RRDp::real, $RRDp::error_mode, $RRDp::error
DESCRIPTION
With this module you can safely communicate with the RRDtool.
After every RRDp::cmd you have to issue an RRDp::read command to get RRDtools answer to your command. The answer is returned as a pointer,
in order to speed things up. If the last command did not return any data, RRDp::read will return an undefined variable.
If you import the PERFORMANCE variables into your namespace, you can access RRDtool's internal performance measurements.
use RRDp
Load the RRDp::pipe module.
RRDp::start path to RRDtool executable
start RRDtool. The argument must be the path to the RRDtool executable
RRDp::cmd rrdtool commandline
pass commands on to RRDtool. Check the RRDtool documentation for more info on the RRDtool commands.
Note: Due to design limitations, RRDp::cmd does not support the "graph -" command - use "graphv -" instead.
$answer = RRDp::read
read RRDtool's response to your command. Note that the $answer variable will only contain a pointer to the returned data. The
reason for this is, that RRDtool can potentially return quite excessive amounts of data and we don't want to copy this around in
memory. So when you want to access the contents of $answer you have to use $$answer which dereferences the variable.
$status = RRDp::end
terminates RRDtool and returns RRDtool's status ...
$RRDp::user, $RRDp::sys, $RRDp::real
these variables will contain totals of the user time, system time and real time as seen by RRDtool. User time is the time RRDtool
is running, System time is the time spend in system calls and real time is the total time RRDtool has been running.
The difference between user + system and real is the time spent waiting for things like the hard disk and new input from the Perl
script.
$RRDp::error_mode and $RRDp::error
If you set the variable $RRDp::error_mode to the value 'catch' before you run RRDp::read a potential ERROR message will not cause
the program to abort but will be returned in this variable. If no error occurs the variable will be empty.
$RRDp::error_mode = 'catch';
RRDp::cmd qw(info file.rrd);
print $RRDp::error if $RRDp::error;
EXAMPLE
use RRDp;
RRDp::start "/usr/local/bin/rrdtool";
RRDp::cmd qw(create demo.rrd --step 100
DS:in:GAUGE:100:U:U
RRA:AVERAGE:0.5:1:10);
$answer = RRDp::read;
print $$answer;
($usertime,$systemtime,$realtime) = ($RRDp::user,$RRDp::sys,$RRDp::real);
SEE ALSO
For more information on how to use RRDtool, check the manpages.
AUTHOR
Tobias Oetiker <tobi@oetiker.ch>
perl v5.14.2 2012-01-24 RRDp(3pm)