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Full Discussion: Open file function
Top Forums Shell Programming and Scripting Open file function Post 302905327 by maverick72 on Wednesday 11th of June 2014 04:02:26 AM
Old 06-11-2014
Open file function
Hello all, just a quick little part of code i'm writing to check if the file i'm writing too in my automatic process is not being written too manually.

Code:
 #!/bin/bash

FUSER=$(/sbin/fuser -s /toto.tmp >/dev/null 2>&1)
LSOF=$(/usr/sbin/lsof | grep -q "toto.tmp")
PGREP=$(pgrep -f "toto.tmp" > /dev/null )

# Manage error

error_log () {

printf "$(date '+%b %e %T') [ $1 ]: %-30s\n" "$2" | tee -a toto.log
}  

check_if_open () {

echo FUSER: $FUSER
echo LSOF: $LSOF
echo PGREP: $PGREP

if [[ $FUSER -eq '0' ]] || [[ $LSOF -eq '0' ]] || [[ "X$PGREP" != "X" ]]; then
  error_log "ERROR" "File toto.tmp is already in write mode"
else
  echo nothing
fi
}

echo Start
check_if_open
echo END

The above code doesn't work and I know i could use something like this bellow but i'm sure there is an easier (cleaner) way.

Code:
pgrep -f "toto.tmp" > /dev/null

if [[ $? -eq '0' ]]; then
error_log blabla
fi

/usr/sbin/lsof | grep -q "toto.tmp"
if [[ $? -eq '0' ]]; then
  error_log blablabla
fi
fuser...
if [[ $? -eq '0' ]]; then
  error_log blablabla
fi

Thanks.
Last edited by maverick72; 06-11-2014 at 05:27 AM..
 

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LEARN ABOUT LINUX

lucancel

lucancel(1M)						  System Administration Commands					      lucancel(1M)

NAME

       lucancel - cancel a scheduled Live Upgrade copy/create procedure

SYNOPSIS

       /usr/sbin/lucancel [-l error_log] [-o outfile] [-X]

DESCRIPTION

       The  lucancel  command  is  part  of  a	suite  of commands that make up the Live Upgrade feature of the Solaris operating environment. See
       live_upgrade(5) for a description of the Live Upgrade feature.

       The lucancel command cancels a boot environment (BE) creation or upgrade that was scheduled in the FMLI-based  interface,  lu(1M),  or  the
       repopulation  of  a BE, scheduled with lumake(1M). lucancel does not cancel a job that is active (that is, is in the process of creation or
       repopulation).

       The lucancel command requires root privileges.

OPTIONS

       The lucancel command has the following options:

       -l error_log

	   Error and status messages are sent to error_log, in addition to where they are sent in your current environment.

       -o outfile

	   All command output is sent to outfile, in addition to where it is sent in your current environment.

       -X

	   Enable XML output. Characteristics of XML are defined in DTD, in /usr/share/lib/xml/dtd/lu_cli.dtd.<num>, where <num>  is  the  version
	   number of the DTD file.

EXIT STATUS

       The following exit values are returned:

       0	Successful completion.

       >0	An error occurred.

FILES

       /etc/lutab

	   list of BEs on the system

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWluu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       lu(1M),	luactivate(1M),  lucompare(1M),  lucreate(1M),	lucurr(1M), ludelete(1M), ludesc(1M), lufslist(1M), lumake(1M), lumount(1M), lure-
       name(1M), lustatus(1M), luupgrade(1M), lutab(4), attributes(5), live_upgrade(5)

SunOS 5.10							    21 Dec 2001 						      lucancel(1M)
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