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Full Discussion: Log File updated time
Top Forums Shell Programming and Scripting Log File updated time Post 302926380 by junior-helper on Sunday 23rd of November 2014 10:30:31 PM
Old 11-23-2014
Quote:
rolling or not
If you mean stuff gets appended to the file or not, then you should try below code. It works by reading the file size, sleeping 30 min, reading the file size again and comparing the two values.

Quote:
not modified
It's also quite possible that the content of a file is changed, but the file size remains the same.
Obviously, in this case you cannot rely on the file size and should compare the modification times.
The code below can be easily adapted to do so.
Hint: You use the %Y format sequence in the stat command instead of %s (Check man stat or stat --help for details)
Code:
#!/bin/bash

fileloc="/tmp"
filename="test.txt"
fullpath="$fileloc"/"$filename"
interval=1800 # seconds (30 minutes)

if [ -f "$fullpath" ]; then
 echo "File Exists"
 size=$(stat -c'%s' "$fullpath")

 # infinite loop
  while true; do
   sleep $interval
   newsize=$(stat -c'%s' "$fullpath")
    if [ $size -ne $newsize ]; then

     echo "Sending mail."
      printf "Size of %s changed.
Size 30 minutes ago: %d bytes.
Current size: %d bytes." "$fullpath" "$size" "$newsize" |\
      mailx -s "Size changed!" someone@example.net

     size=$newsize
    fi
  done

else
  echo "File not exist"
fi

 

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LEARN ABOUT BSD

disktab

DISKTAB(5)							File Formats Manual							DISKTAB(5)

NAME

       disktab - disk description file

SYNOPSIS

       #include <disktab.h>

DESCRIPTION

       Disktab	is a simple date base which describes disk geometries and disk partition characteristics.  The format is patterned after the term-
       cap(5) terminal data base.  Entries in disktab consist of a number of `:' separated fields.  The first entry for each disk gives the  names
       which are known for the disk, separated by `|' characters.  The last name given should be a long name fully identifying the disk.

       The following list indicates the normal values stored for each disk entry.

       Name  Type  Description
       ns    num   Number of sectors per track
       nt    num   Number of tracks per cylinder
       nc    num   Total number of cylinders on the disk
       b0    str   Filename of block zero primary bootstrap for device
       ba    num   Block size for partition `a' (bytes)
       bd    num   Block size for partition `d' (bytes)
       be    num   Block size for partition `e' (bytes)
       bf    num   Block size for partition `f' (bytes)
       bg    num   Block size for partition `g' (bytes)
       bh    num   Block size for partition `h' (bytes)
       fa    num   Fragment size for partition `a' (bytes)
       fd    num   Fragment size for partition `d' (bytes)
       fe    num   Fragment size for partition `e' (bytes)
       ff    num   Fragment size for partition `f' (bytes)
       fg    num   Fragment size for partition `g' (bytes)
       fh    num   Fragment size for partition `h' (bytes)
       pa    num   Size of partition `a' in sectors
       pb    num   Size of partition `b' in sectors
       pc    num   Size of partition `c' in sectors
       pd    num   Size of partition `d' in sectors
       pe    num   Size of partition `e' in sectors
       pf    num   Size of partition `f' in sectors
       pg    num   Size of partition `g' in sectors
       ph    num   Size of partition `h' in sectors
       se    num   Sector size in bytes (default 512)
       sf    bool  supports bad144-style bad sector forwarding
       so    bool  partition offsets in sectors
       ty    str   Type of disk (e.g. removable, winchester)

       Disktab entries may be automatically generated with the diskpart program.

FILES

       /etc/disktab

SEE ALSO

       newfs(8), diskpart(8), getdiskbyname(3)

BUGS

       This file shouldn't exist, the information should be stored on each disk pack.

4.2 Berkeley Distribution					   May 17, 1986 							DISKTAB(5)
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