11-11-2005
Reading from a file
I've used the grep command along with sed to sent ouput to a file, like shown below
DATE=grep file1 /home/zoolz/delreg | sed -e 's/^.*:://' #not exact code but near enough
This works fine as it takes all the lines with the word file1 in it ands cuts it down so that i am just left with the date. In case your wondering '/home/zoolz/delreg' the file that i am taking the info from contains lines like this.
file1@@/bin/user/file1::31/10/05
Now i have a couple of dates in the DATE variable and i want to seperate them into seperate variables say date1 date2 etc. Can i use read in the script or do i sent them to a function that i create. I've tried both these ways and when i pass DATE to a function it does divide it up but not in a way that will deal with a case of a large number.
Eg.
sortdate()
date1=$1
date2=$2
date3=$3
etc
Also when i use an until loop for this with a counter it just does not work. Does anyone have any idea where i'm going wrong.
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DIFF3(1) General Commands Manual DIFF3(1)
NAME
diff3 - 3-way differential file comparison
SYNOPSIS
diff3 [ -ex3 ] file1 file2 file3
DESCRIPTION
Diff3 compares three versions of a file, and publishes disagreeing ranges of text flagged with these codes:
==== all three files differ
====1 file1 is different
====2 file2 is different
====3 file3 is different
The type of change suffered in converting a given range of a given file to some other is indicated in one of these ways:
f : n1 a Text is to be appended after line number n1 in file f, where f = 1, 2, or 3.
f : n1 , n2 c Text is to be changed in the range line n1 to line n2. If n1 = n2, the range may be abbreviated to n1.
The original contents of the range follows immediately after a c indication. When the contents of two files are identical, the contents of
the lower-numbered file is suppressed.
Under the -e option, diff3 publishes a script for the editor ed that will incorporate into file1 all changes between file2 and file3, i.e.
the changes that normally would be flagged ==== and ====3. Option -x (-3) produces a script to incorporate only changes flagged ====
(====3). The following command will apply the resulting script to `file1'.
(cat script; echo '1,$p') | ed - file1
FILES
/tmp/d3?????
/usr/lib/diff3
SEE ALSO
diff(1)
BUGS
Text lines that consist of a single `.' will defeat -e.
Files longer than 64K bytes won't work.
DIFF3(1)