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Top Forums Shell Programming and Scripting script to view files based on date Post 85273 by vino on Tuesday 4th of October 2005 09:05:07 AM
Old 10-04-2005
In short RTFM.

From man touch

Code:
       -d, --date=STRING
              parse STRING and use it instead of current time

       -F, --forward=SECONDS
              Modify  the time by going forward SECONDS seconds.  For example,
              touch -r foo -F 5 bar will make the file  bar  5  seconds  newer
              than file foo.

       -r, --reference=FILE
              use this file's times instead of current time

That means create /tmp/OLD which has a timestamp provided by the user.

And then create /tmp/NEW which is exactly 24 hours newer compared to /tmp/OLD

And from man find,

Code:
       -newer file
              File was modified more recently than file.  -newer  is  affected
              by  -follow  only  if -follow comes before -newer on the command
              line.

       -size n[bckw]
              File uses n units of space.  The units are  512-byte  blocks  by
              default  or  if `b' follows n, bytes if `c' follows n, kilobytes
              if `k' follows n, or 2-byte words if `w' follows  n.   The  size
              does  not  count  indirect  blocks,  but it does count blocks in
              sparse files that are not actually allocated.

The find script says -- find all files which are newer than /tmp/OLD but not /tmp/NEW and whose size is not zero.

Vino
 

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FIND(1) 						      General Commands Manual							   FIND(1)

NAME
find - find files meeting a given condition SYNOPSIS
find directory expression EXAMPLES
find / -name a.out -print # Print all a.out paths find /usr/ast ! -newer f -ok rm {} ; # Ask before removing find /usr -size +20 -exec mv {} /big ; # move files > 20 blks find / -name a.out -o -name '*.o' -exec rm {}; # 2 conds DESCRIPTION
Find descends the file tree starting at the given directory checking each file in that directory and its subdirectories against a predi- cate. If the predicate is true, an action is taken. The predicates may be connected by -a (Boolean and), -o (Boolean or) and ! (Boolean negation). Each predicate is true under the conditions specified below. The integer n may also be +n to mean any value greater than n, -n to mean any value less than n, or just n for exactly n. -name s true if current filename is s (include shell wild cards) -size n true if file size is n blocks -inum n true if the current file's i-node number is n -mtime ntrue if modification time relative to today (in days) is n -links ntrue if the number of links to the file is n -newer ftrue if the file is newer than f -perm n true if the file's permission bits = n (n is in octal) -user u true if the uid = u (a numerical value, not a login name) -group gtrue if the gid = g (a numerical value, not a group name) -type x where x is bcdfug (block, char, dir, regular file, setuid, setgid) -xdev do not cross devices to search mounted file systems Following the expression can be one of the following, telling what to do when a file is found: -print print the file name on standard output -exec execute a MINIX command, {} stands for the file name -ok prompts before executing the command SEE ALSO
test(1), xargs(1). FIND(1)
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