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Full Discussion: Take action only if a file is X hours (or seconds) old
Top Forums Shell Programming and Scripting Take action only if a file is X hours (or seconds) old Post 302351446 by phdeez on Tuesday 8th of September 2009 02:31:55 PM
Old 09-08-2009
Take action only if a file is X hours (or seconds) old
shell: #!/bin/ash

I searched and found a few relevant posts (here and here - both by porter, on the same day (?)) however both are just a do while loop, I need to check a file date and compare it to the current time.

I would like it to say if file 'test' is more than 12 hours old than "right now" to echo back "file is stale" else echo "file is ok". I was thinking I could get the "unix time" of the file and just subtract them, but honestly I have no idea how to get the unix time of a file (much less in a script)

concept:
Code:
touch magic

$timediff = creation time of file magic - creation time of file test (in seconds)

if $timediff > 43200 (seconds) then echo "file is stale" else "file is ok"

I'm sure there is a better/easier way to do this... Thanks all!
 

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LEARN ABOUT OPENSOLARIS

shells

shells(4)							   File Formats 							 shells(4)

NAME

       shells - shell database

SYNOPSIS

       /etc/shells

DESCRIPTION

       The shells file contains a list of the shells on the system. Applications use this file to determine whether a shell is valid. See getuser-
       shell(3C). For each shell a single line should be present, consisting of the shell's path, relative to root.

       A hash mark (#) indicates the beginning of a comment; subsequent characters up to the end of the line are not interpreted by  the  routines
       which search the file. Blank lines are also ignored.

       The following default shells are used by utilities: /bin/bash, /bin/csh, /bin/jsh, /bin/ksh, /bin/ksh93, /bin/pfcsh, /bin/pfksh, /bin/pfsh,
       /bin/sh, /bin/tcsh, /bin/zsh, /sbin/jsh, /sbin/sh, /usr/bin/bash, /usr/bin/csh, /usr/bin/jsh, /usr/bin/ksh, /usr/bin/ksh93, /usr/bin/pfcsh,
       /usr/bin/pfksh, /usr/bin/pfsh, and /usr/bin/sh, /usr/bin/tcsh, /usr/bin/zsh, and /usr/sfw/bin/zsh. /etc/shells overrides the default list.

       Invalid shells in /etc/shells could cause unexpected behavior, such as being unable to log in by way of ftp(1).

FILES

       /etc/shells    list of shells on system

SEE ALSO

       vipw(1B), ftpd(1M), sendmail(1M), getusershell(3C), aliases(4)

SunOS 5.11							    20 Nov 2007 							 shells(4)
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