Send sleep to background Post: 302968602

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Top Forums Shell Programming and Scripting Send sleep to background Post 302968602 by builderj on Friday 11th of March 2016 01:01:31 PM

03-11-2016

Registered User

Hi RudiC,

I use the below part inside another shell script (parent script) where the parent script is executed as "sh -ex parent.sh".

until [ -f /tmp/examplefile.txt ]
do
/bin/sleep 3
done
echo "File found"

If the above is a standalone script, I can run it by just using "sh" as per Scrutinizer. Works great.

Since this part is inside another script, I get the output as below.

07:53:09 + '[' -f /opt/cc...... ']'
07:53:09 + sleep 5
07:53:11 + '[' -f /opt/cc...... ']'
07:53:11 + sleep 5
07:53:19 + '[' -f /opt/cc...... ']'
07:53:19 + sleep 5
07:53:21 + '[' -f /opt/cc...... ']'
07:53:21 + sleep 5
07:53:28 + '[' -f /opt/cc...... ']'
07:53:28 + sleep 5
07:53:32 + '[' -f /opt/cc...... ']'
07:53:32 + sleep 5
07:53:36 + '[' -f /opt/cc...... ']'
07:53:36 + sleep 5
07:53:41 + '[' -f /opt/cc...... ']'
07:53:41 + sleep 5
07:53:46 + '[' -f /opt/cc...... ']'
07:53:46 + sleep 5
07:53:51 + '[' -f /opt/cc...... ']'
07:53:51 + sleep 5
07:53:56 + '[' -f /opt/cc...... ']'
07:53:56 + sleep 5
07:54:01 + '[' -f /opt/cc...... ']'
07:54:01 + sleep 5
07:54:06 + '[' -f /opt/cc...... ']'
07:54:06 + sleep 5
07:54:11 + '[' -f /opt/cc...... ']'

@sea:

first method works great if I execute it as ./test.sh or sh test.sh.
since this is inside another script, it didn't work.

This is what i get if use your second method.
tui-wait: command not found

builderj

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LEARN ABOUT CENTOS

sleep

SLEEP(3)						     Linux Programmer's Manual							  SLEEP(3)

NAME

       sleep - sleep for the specified number of seconds

SYNOPSIS

       #include <unistd.h>

       unsigned int sleep(unsigned int seconds);

DESCRIPTION

       sleep() makes the calling thread sleep until seconds seconds have elapsed or a signal arrives which is not ignored.

RETURN VALUE

       Zero if the requested time has elapsed, or the number of seconds left to sleep, if the call was interrupted by a signal handler.

CONFORMING TO

       POSIX.1-2001.

BUGS

       sleep() may be implemented using SIGALRM; mixing calls to alarm(2) and sleep() is a bad idea.

       Using longjmp(3) from a signal handler or modifying the handling of SIGALRM while sleeping will cause undefined results.

SEE ALSO

       alarm(2), nanosleep(2), signal(2), signal(7)

COLOPHON

       This  page is part of release 3.53 of the Linux man-pages project.  A description of the project, and information about reporting bugs, can
       be found at http://www.kernel.org/doc/man-pages/.

GNU
								    2010-02-03								  SLEEP(3)