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Top Forums Shell Programming and Scripting Read/Search file being written to giving error due to timing issues Post 302371830 by steadyonabix on Monday 16th of November 2009 12:33:02 PM
Old 11-16-2009
You are testing the sed output to see if it is an empty string but if the log file is not there RESULT =

Code:
sed: can't read x_new.log: No such file or directory



---------- Post updated at 05:33 PM ---------- Previous update was at 03:01 PM ----------

I think at a minimum you want to do something like this: -

Code:
${LOG_FILE_NEW}=x_new.log
${LOG_FILE}=some_log.log

[[ -a ${LOG_FILE_NEW} ]] && echo "Log file ${LOG_FILE_NEW} not found, exiting" && exit 1

while [[ true ]]
do
        [[ $(egrep -c "SHUTTING_DOWN|RUNNING" ${LOG_FILE_NEW}) -ne 0 ]] && break
        sleep 10
done
mv ${LOG_FILE_NEW} ${LOG_FILE}

Now you are not dependent on sed returning an empty string.
 

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FSCK-LARCH(1)						      General Commands Manual						     FSCK-LARCH(1)

NAME
fsck-larch - verify that a larch B-tree is internally consistent SYNOPSIS
fsck-larch [--config=FILE] [--dump-config] [--dump-memory-profile=METHOD] [--dump-setting-names] [--fix] [--generate-manpage=TEMPLATE] [-h] [--help] [--list-config-files] [--log=FILE] [--log-keep=N] [--log-level=LEVEL] [--log-max=SIZE] [--log-mode=MODE] [--no-default-configs] [--output=FILE] [--trace=PATTERN] [--version] [FILE]... DESCRIPTION
fsck-larch reads an on-disk, committed B-tree created by the larch Python library, and verifies that it is internally consistent. It re- ports any problems it finds, but does not currently fix them. OPTIONS
--config=FILE add FILE to config files --dump-config write out the entire current configuration --dump-memory-profile=METHOD make memory profiling dumps using METHOD, which is one of: none, simple, meliae, or heapy (default: simple) --dump-setting-names write out all names of settings and quit --fix fix problems found? --generate-manpage=TEMPLATE fill in manual page TEMPLATE -h, --help show this help message and exit --list-config-files list all possible config files --log=FILE write log entries to FILE (default is to not write log files at all); use "syslog" to log to system log, or "none" to disable log- ging --log-keep=N keep last N logs (10) --log-level=LEVEL log at LEVEL, one of debug, info, warning, error, critical, fatal (default: debug) --log-max=SIZE rotate logs larger than SIZE, zero for never (default: 0) --log-mode=MODE set permissions of new log files to MODE (octal; default 0600) --no-default-configs clear list of configuration files to read --output=FILE write output to FILE, instead of standard output --trace=PATTERN add PATTERN to trace patterns --version show program's version number and exit SEE ALSO
Larch home page (http://liw.fi/larch/). FSCK-LARCH(1)
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