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How to compare two file contents which created within one hour?

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Top Forums Shell Programming and Scripting How to compare two file contents which created within one hour?
# 8  
Old 07-29-2014
If you want to compare every file to every other file just once, try (given you get rid of your find -cmin error):
Code:
find * -cmin -60 | while read FN1
   do find * -cmin -60 | tac | while read FN2
      do [ "$FN1" = "$FN2" ] && break
          diff  "$FN1"  "$FN2"
      done
   done

This User Gave Thanks to RudiC For This Post:
ken6503
# 9  
Old 07-29-2014
Quote:
Originally Posted by Don Cragun
As long as you don't run it any day before 1am, you could try something like:
Code:
#!/bin/ksh
IAm=${0##*/}
read x y z <<-EOF
    $(date +'%m%d %H %M%n')
EOF
trap 'rm -f "$IAm.$$"' EXIT
touch -t $(printf '%s%02d%s' $x $((${y#0} - 1)) $z) "$IAm.$$"
find srch_dir -newer "$IAm.$$" -name 'abc2014*' | (
    read file1
    while read file2
    do    diff "$file1" "$file2"
    done
)

Hi Don Cragun
for my script, after finding the files, I need to output to tmp file then do something, then compare.
for below code, how can I put them in while loop.

Code:
 
find srch_dir -newer "$IAm.$$" -name 'abc2014*' | (
read file1
while read file2
do diff "$file1" "$file2"
done
)

thanks in advance
# 10  
Old 07-29-2014
Quote:
Originally Posted by ken6503
Hi Don Cragun
for my script, after finding the files, I need to output to tmp file then do something, then compare.
for below code, how can I put them in while loop.

Code:
 
find srch_dir -newer "$IAm.$$" -name 'abc2014*' | (
read file1
while read file2
do diff "$file1" "$file2"
done
)

thanks in advance
Can you be any more vague???
Try:
Code:
#!/bin/ksh
IAm=${0##*/}
read x y z <<-EOF
	$(date +'%m%d %H %M%n')
EOF
trap 'rm -f "$IAm.$$"' EXIT
touch -t $(printf '%s%02d%s' $x $((${y#0} - 1)) $z) "$IAm.$$"
find srch_dir -newer "$IAm.$$" -name 'abc2014*' | (
	read file1
	while read file2
	do	echo 'who knows what' > tmpfile	# output to temp file
		# do something else here
		diff "$file1" "$file2"	# compare
	done
)

This User Gave Thanks to Don Cragun For This Post:
ken6503
# 11  
Old 07-29-2014
So where does this bit come in if the find doesn't work?

Quote:
I am able to use find command find the files but I don't know how to compare these two file contents.

Code:
 
for filename in `find srch_dir -cmin -60 -name abc2014*`
do
here i don't know how to store the first file then use diff $filename1 $filename2

This User Gave Thanks to rbatte1 For This Post:
ken6503
# 12  
Old 07-29-2014
Quote:
Originally Posted by Don Cragun
Can you be any more vague???
Try:
Code:
#!/bin/ksh
IAm=${0##*/}
read x y z <<-EOF
    $(date +'%m%d %H %M%n')
EOF
trap 'rm -f "$IAm.$$"' EXIT
touch -t $(printf '%s%02d%s' $x $((${y#0} - 1)) $z) "$IAm.$$"
find srch_dir -newer "$IAm.$$" -name 'abc2014*' | (
    read file1
    while read file2
    do    echo 'who knows what' > tmpfile    # output to temp file
        # do something else here
        diff "$file1" "$file2"    # compare
    done
)

Thanks for your reply.

sorry for the vague???

when first time running the script there is no any files in the directory. the find command only find one file, I don't need to compare. what i want to do is after finding the file(s), first I want to count how many files I found, if it is one, I don't compare; if it is two files, I will compare.

hopefully, this time is a little bit clear.

thanks in advance.
# 13  
Old 07-29-2014
Why do you want to count the files. The script I gave you won't do anything unless there are at least two files. If there are two or more files, it will execute the commands in the while loop once for each file except the 1st file. The name of the 1st file is preserved in the variable file1 and doesn't change while the name of each remaining file is stored in the variable file2 as it is processed in the loop.

You have said you want to create a temp file, but you haven't shown us what would go into that temp for nor what it would be used for. Then you said you want to do something else, but you haven't said what. Then, if there are two or more files, you said you want to compare the files; the script I gave you does that.

Did you try running the script I gave you when 0, 1, 2, and 3 files with names starting with abc2014 were present that had been created within the last hour? For each case, what did the script do wrong?
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