03-13-2009
wait problem
Hello, I have been trying to figure out why the wait isnt waiting for the sleep process to complete till now and have found out that since sleep runs as different process and not a child process the wait isnt waiting.
script:
cat test|while read i
do
echo $i
sleep 30 &
done
wait
ps -ef|grep sleep
The output of the above script is
1 ab
2 bc
3 cd
4 de
user 24553 1 0 06:15 pts/3 00:00:00 sleep 30
user 24554 1 0 06:15 pts/3 00:00:00 sleep 30
user 24555 1 0 06:15 pts/3 00:00:00 sleep 30
user 24556 1 0 06:15 pts/3 00:00:00 sleep 30
user 24558 24550 0 06:15 pts/3 00:00:00 grep sleep
Can somebody please let me know how I can have the sleep command run as a child process so that the wait command works and the output of the script wont show any sleep processes running in the background.
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LEARN ABOUT X11R4
pts_sleep
PTS_SLEEP(1) AFS Command Reference PTS_SLEEP(1)
NAME
pts_sleep - Pauses for a few seconds
SYNOPSIS
pts sleep [-delay] <# of seconds>
[-cell] <cell name> [-noauth] [-localauth] [-force]
pts sl [-d] <# of seconds> [-c] <cell name>
[-n] [-l] [-f]
DESCRIPTION
The pts sleep pauses for a specified number of seconds. The command can be run from the command line or interactively, although from the
command line it's essentially equivalent to the sleep command. It is intended for use in interactive mode to pause for a few seconds
between batch commands to allow the Protection Server to catch up.
CAUTIONS
Prior to OpenAFS 1.4.5 and OpenAFS 1.5.23, the pts sleep command was only available on Unix or Linux and when OpenAFS was compiled with the
supergroups option (disabled by default). As of OpenAFS 1.4.5 and 1.5.23, it is always available.
OPTIONS
Although they have no effect, pts sleep takes the following standard pts options:
-cell <cell name>
Names the cell in which to run the command. For more details, see pts(1).
-force
Enables the command to continue executing as far as possible when errors or other problems occur, rather than halting execution at the
first error.
-help
Prints the online help for this command. All other valid options are ignored.
-localauth
Constructs a server ticket using a key from the local /etc/openafs/server/KeyFile file. Do not combine this flag with the -cell or
-noauth options. For more details, see pts(1).
-noauth
Assigns the unprivileged identity anonymous to the issuer. For more details, see pts(1).
OUTPUT
This command produces no output.
EXAMPLES
Here is an example of a pts interactive session:
% pts interactive
pts> sleep 5
pts> quit
%
SEE ALSO
pts(1), pts_interactive(1)
COPYRIGHT
Copyright 2007 Jason Edgecombe <jason@rampaginggeek.com>
This documentation is covered by the BSD License as written in the doc/LICENSE file. This man page was written by Jason Edgecombe for
OpenAFS.
OpenAFS 2014-04-08 PTS_SLEEP(1)