Works (almost) fine in bash, too. But I don't understand the use of the sleep command as a background process. Furthermore, the "done" messages caused by returning sleeps disturb the display :-(
Hi Pen, the sleep in the background ensures that you use as little time as possible processing the other commands in the loop. Otherwise total sleep is sometimes a bit more than 60 seconds.
You'll get done messages if you execute it from the command line, not if you execute it from a script. Alternatively you can enclose it in parentheses like so:
Then you won't get the pesky job status.
Or you can put it in a function like CFA suggests..
(BTW I just changed the \b\b for \r because now I realise the backspaces weren't working properly).
Quote:
Nevertheless, much simplier would be just the good ole
BR,
pen
Indeed, but it is my understanding that the OP requested a countdown timer.
Last edited by Scrutinizer; 10-04-2009 at 02:55 PM..
Hi all,
Wanted to a create a shell script
-----------------------------------------------------------------------
1) which when called will start a timer and wait for 48 hours.
after 48 hours it will call some function(say XYZ)
2) Whenever this shell script is called (can be called... (3 Replies)
any of you guys have a script for measuring the run time of any given script, where you would sandwich your own script between the timer script or something? thanks! :) (2 Replies)
Hey guys, I'm brand new to the bash scripting world, here's my issue..
When people SSH to my box, I'm wanting to use screen to monitor them if I so choose. So, I've created a new user: testing, and I've set its startup shell to /bin/myshell.sh whose contents read this:
#!/bin/sh
$me =... (4 Replies)
Hi
I have a script that execute every X minute for checking new files in a folder and converting to pdf.
Is there any way to start this script automatically on linux startup?. I use sleep function in script with infinite loop.
while
do
killall -u `whoami` -q soffice
soffice... (0 Replies)
So I am attempting to get a short but complex perl script to be able to time out an application that I will launch from a command line. The terminal I use is MKS C SHELL and I am having trouble doing the a job spawn that will launch the application and keep time on it.
I know you could do this... (1 Reply)
Hey folks,
We already got a working Script running, but actually we gotta start it manually but at least we want to run it like every 30minutes 1time.
Could anyone give it a shot?
#!/bin/sh
for i in A B C D E F G H I J K L M N O P Q R S T U V W X Z
do
ln -sv /x/$i/*/PDF/001-*.*... (1 Reply)
Hello Experts-
We are facing some issues in the while loop script when we use the script time to decide whether to exist from the loop or continue.
Below is the script
SrcExitLoop="FALSE"
Src_InitialStartTime=`date +%s`
Src_StartTime=`date +%s`
Src_NUM_ALERTS=0
TOTAL_ALERTS=`expr <SOME... (4 Replies)
Hi
Could somebody please help me with this code?
------------------------------------------
@ftp -i -s:"%~f0"&GOTO:EOF
open mysite.co.uk
myusername
mypassword
!:--- FTP commands below here ---
cd public_html/
binary
lcd c:\
put myfile.jpg
bye
... (3 Replies)
Discussion started by: dobbies
3 Replies
LEARN ABOUT DEBIAN
sleepenh
SLEEPENH(1) General Commands Manual SLEEPENH(1)NAME
sleepenh - an enhanced sleep program.
SYNOPSIS
sleepenh [initial-time] sleep-time
DESCRIPTION
sleepenh is a program that can be used when there is a need to execute some functions periodically in a shell script. It was not designed
to be accurate for a single sleep, but to be accurate in a sequence of consecutive sleeps.
After a successful execution, it returns to stdout the timestamp it finished running, that can be used as initial-time to a successive exe-
cution of sleepenh.
OPTIONS
There are no command line options. Run it without any option to get a brief help and version.
ARGUMENTS
sleep-time is a real number in seconds, with microseconds resolution (1 minute, 20 seconds and 123456 microseconds would be 80.123456).
initial-time is a real number in seconds, with microseconds resolution. This number is system dependent. In GNU/Linux systems, it is the
number of seconds since midnight 1970-01-01 GMT. Do not try to get a good value of initial-time. Use the value supplied by a previous exe-
cution of sleepenh.
If you don't specify initial-time, it is assumed the current-time.
EXIT STATUS
An exit status greater or equal to 10 means failure. Known exit status:
0 Success.
1 Success. There was no need to sleep. (means that initial-time + sleep-time was greater than current-time).
10 Failure. Missing command line arguments.
11 Failure. Did not receive SIGALRM.
12 Failure. Argument is not a number.
13 Failure. System error, could not get current time.
USAGE EXAMPLE
Suppose you need to send the char 'A' to the serial port ttyS0 every 4 seconds. This will do that:
#!/bin/sh
TIMESTAMP=`sleepenh 0`
while true; do
# send the byte to ttyS0
echo -n "A" > /dev/ttyS0;
# just print a nice message on screen
echo -n "I sent 'A' to ttyS0, time now is ";
sleepenh 0;
# wait the required time
TIMESTAMP=`sleepenh $TIMESTAMP 4.0`;
done
HINT
This program can be used to get the current time. Just execute:
sleepenh 0
BUGS
It is not accurate for a single sleep. Short sleep-times will also not be accurate.
SEE ALSO date(1), sleep(1).
AUTHOR
This manual page was written by Pedro Zorzenon Neto.
2008/04/20 SLEEPENH(1)