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Top Forums Shell Programming and Scripting calculating the time difference, when the script was executed and the currenent file Post 302214582 by joeyg on Monday 14th of July 2008 10:17:04 AM
Old 07-14-2008
Hammer & Screwdriver Take a look at the stat command

stat -c %X ==>time of last access
stat -c %Y ==>time of last modification
stat -c %Z ==>time of last change

Thus, if you set a variable to capture the returned number, you can compare it to a number for now (i.e. touch a file and get similar value).

Code:
ch_file1=$(stat -c %Y file1)
touch file2
ch_file2=$(stat -c %Y file2)

then see if they are different by more than 300 [300 seconds = 5 minutes]

Code:
> file_diff=$((ch_file2-ch_file1))
> echo $file_diff
533


Last edited by joeyg; 07-14-2008 at 11:20 AM.. Reason: added code to do math difference
 

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SCRIPT(1)						    BSD General Commands Manual 						 SCRIPT(1)

NAME
script -- make typescript of terminal session SYNOPSIS
script [-adfpqr] [-c command] [file] DESCRIPTION
script makes a typescript of everything printed on your terminal. It is useful for students who need a hardcopy record of an interactive session as proof of an assignment, as the typescript file can be printed out later with lpr(1). If the argument file is given, script saves all dialogue in file. If no file name is given, the typescript is saved in the file typescript. Option: -a Append the output to file or typescript, retaining the prior contents. -c command Run the named command instead of the shell. Useful for capturing the output of a program that behaves differently when associated with a tty. -d When playing back a session with the -p flag, don't sleep between records when playing back a timestamped session. -f Flush output after each write. This is useful for watching the script output in real time. -p Play back a session recorded with the -r flag in real time. -q Be quiet, and don't output started and ended lines. -r Record a session with input, output, and timestamping. The script ends when the forked shell exits (a control-D to exit the Bourne shell (sh(1)), and exit, logout or control-d (if ignoreeof is not set) for the C-shell, csh(1)). Certain interactive commands, such as vi(1), create garbage in the typescript file. script works best with commands that do not manipulate the screen, the results are meant to emulate a hardcopy terminal. ENVIRONMENT
The following environment variable is used by script: SHELL If the variable SHELL exists, the shell forked by script will be that shell. If SHELL is not set, the Bourne shell is assumed. (Most shells set this variable automatically). SEE ALSO
csh(1) (for the history mechanism). HISTORY
The script command appeared in 3.0BSD. BUGS
script places everything in the log file, including linefeeds and backspaces. This is not what the naive user expects. BSD
October 17, 2009 BSD
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