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Full Discussion: check for "cannot open file"
Top Forums UNIX for Dummies Questions & Answers check for "cannot open file" Post 302108435 by sb008 on Monday 26th of February 2007 01:36:07 PM
Old 02-26-2007
Quote:
Originally Posted by ssmith001
I have a small script that checks to see if a file exists and that it has data in it. I also need to check if the file can be opened. I had an issue today where the file it checks could not be opened and my script did not catch it. How do I check to see if it cannot be opened?

Code:
dirname=/opt/manu/srv
f1=manumgrmdip2_7500.log
f2=manumgrmdip2_7500.pid
export HOST=`hostname`
f1size=`wc -c $dirname/manumgrmdip2_7500.log | cut -f1 -d " "`
f2size=`wc -c $dirname/manumgrmdip2_7500.pid | cut -f1 -d " "`

if [[ ! -f $dirname/$f1 || ! -f $dirname/$f2 ]] ; then
      echo "Either <$dirname/$f1> or <$dirname/$f1> does not exist" | mailx -s "Missing files on Manugistics $HOST Server (MDIP2)" user@xyz.com
else if (( $(wc -c < $dirname/$f1) != 0 )) || (( $(wc -c < $dirname/$f2) > 6 )) ; then
      echo "The size of $dirname/$f1 size = $f1size, and $dirname/$f2 = $f2size'" | mailx -s "Error with file sizes on Manugistics $HOST Server (MDIP2)" user@xyz.com < manumgrmdip2_7500.log
     fi;
fi;


-r <filename> to check for existance and readability
-s <filename> to check for existance and size greater than 0

Code:
#!/usr/bin/ksh
dirname=/opt/manu/srv
f1=manumgrmdip2_7500.log
f2=manumgrmdip2_7500.pid
export HOST=`hostname`

if [ ! -r ${dirname}/${f1} -o ! -r ${dirname}/${f2} ]
then
  echo "Either <$dirname/$f1> or <$dirname/$f1> does not exist or is not readable" | mailx -s "Missing files on Manugistics $HOST Server (MDIP2)" user@xyz.com
elif [ ! -s ${dirname}/${f1} -o ! -s ${dirname}/${f2} ]
then
  echo "Either <$dirname/$f1> or <$dirname/$f2>has a filesize of 0'" | mailx -s "Error with file sizes on Manugistics $HOST Server (MDIP2)" user@xyz.com < manumgrmdip2_7500.log
fi

if you want to know the exact size use the typeset command so you don't need the cut command:

Code:
typset -i f1size f2size
f1size=`wc -c ${dirname}/${f1}`
f2size=`wc -c ${dirname}/${f2}`

 

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LEARN ABOUT OSX

dbix::class::startupcheck

DBIx::Class::StartupCheck(3)				User Contributed Perl Documentation			      DBIx::Class::StartupCheck(3)

NAME

       DBIx::Class::StartupCheck - Run environment checks on startup

SYNOPSIS

	 use DBIx::Class::StartupCheck;

DESCRIPTION

       This module used to check for, and if necessary issue a warning for, a particular bug found on Red Hat and Fedora systems using their
       system perl build. As of September 2008 there are fixed versions of perl for all current Red Hat and Fedora distributions, but the old
       check still triggers, incorrectly flagging those versions of perl to be buggy. A more comprehensive check has been moved into the test
       suite in "t/99rh_perl_perf_bug.t" and further information about the bug has been put in DBIx::Class::Manual::Troubleshooting.

       Other checks may be added from time to time.

       Any checks herein can be disabled by setting an appropriate environment variable. If your system suffers from a particular bug, you will
       get a warning message on startup sent to STDERR, explaining what to do about it and how to suppress the message. If you don't see any
       messages, you have nothing to worry about.

CONTRIBUTORS

       Nigel Metheringham

       Brandon Black

       Matt S. Trout

AUTHOR

       Jon Schutz

LICENSE

       You may distribute this code under the same terms as Perl itself.

perl v5.16.2							    2011-05-23					      DBIx::Class::StartupCheck(3)
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