topic Re: if statement for file size in Operating System - HP-UX

if statement for file size

Ratzie — Fri, 13 Feb 2004 13:24:36 GMT

is there a simple if statement for a file size?

if [ file size -gt 60 ]
than
blah
fi

Doesnot work.

Re: if statement for file size

A. Clay Stephenson — Fri, 13 Feb 2004 13:30:25 GMT

No directly: You need to leverage ls -l and awk (as but one method):

FNAME=myfile
typeset -i10 SZ=$(ls -l ${FNAME} | awk '{print $5}')
if [[ ${SZ} -gt 60 ]]
then
blah
blah
fi

The only built-in test is
if [[ -s ${FNAME} ]]
which tests id ${FNAME exists and has a size > 0.

Re: if statement for file size

Hai Nguyen_1 — Fri, 13 Feb 2004 13:31:40 GMT

You got spelling problem. Should have read:

if [ file size -gt 60 ]
then
blah
fi

Hai

Re: if statement for file size

Kent Ostby — Fri, 13 Feb 2004 13:38:49 GMT

ll | awk '{$5>60)'

Would get you all the files > then 60 bytes.

Best regards,

Kent Ostby

Re: if statement for file size

Dave La Mar — Fri, 13 Feb 2004 14:00:32 GMT

find file -size +61c >/dev/null
if [ $? -lt 1 ]
then
blah
fi

Best regards,

dl

Re: if statement for file size

RAC_1 — Fri, 13 Feb 2004 14:09:20 GMT

ll|awk '{if($5>=60) print}'

Will print files of 60 bytes and more.

Re: if statement for file size

Tom Smith_9 — Fri, 13 Feb 2004 14:14:23 GMT

Try this

LOGSIZE=$((`du -k $LOG | awk '{print $1}'`))

Assuming $LOG is the name of the file.

Hope it helps.

Re: if statement for file size

Tom Smith_9 — Fri, 13 Feb 2004 14:28:49 GMT

Sorry my last post was missing this,

if [ $(( $LOGSIZE > $LOGSIZELIMIT )) != 0 ] ; then

Re: if statement for file size

Hein van den Heuvel — Fri, 13 Feb 2004 14:36:19 GMT

In perl there is: -s

Usage example:

perl -e 'while (<*>) { print -s," $_\n" if (-s > 6000)}'

Hein.

Re: if statement for file size

Elmar P. Kolkman — Fri, 13 Feb 2004 14:49:48 GMT

One thing to bear in mind: most shell commands have problems calculating and perhaps comparing with values larger the 2G.
If your file might be in that range, you can alter Clay's shell solution to divide the size by 1024, for instance, to get the size in kb in your awk part (awk '/file$/{printf "%d\n",$5/1024}).

You could also use things like 'wc -b ', though I wouldn't recommend this for large files (it will literally count bytes in the file!) or 'du -k | cut -f1' to get the size in kb.
ls -s is also a solution, but will get you the size of the file in filesystemblocksize, which might not be what you want.