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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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36
Task/Determine-if-only-one-instance-is-running/UNIX-Shell/determine-if-only-one-instance-is-running.sh Normal file
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# (c) Copyright 2005 Mark Hobley
#
# This is free software. This file can be redistributed or modified
# under the terms of version 1.2 of the GNU Free Documentation Licence
# as published by the Free Software Foundation.
#
singleinstance ()
{
if [ -d $SRUNDIR ] ; then
if [ -w $SRUNDIR ] ; then
if [ -d $SRUNDIR/$APPNAME ] ; then
echo "Process Already Running" >& 2
return 221
else
mkdir $SRUNDIR/$APPNAME
if [ "$?" -ne 0 ] ; then
if [ -d $SRUNDIR/$APPNAME ] ; then
echo "Process Already Running" >& 2
return 221
else
echo "Unexpected Error" >& 2
return 239
fi
fi
return 0 ; # This is a unique instance
fi
else
echo "Permission Denied" >& 2
return 210
fi
else
echo "Missing Directory" >& 2
return 199
fi
}