08-23-2012
Hi Don,that code I used was used from another thread on here about comparing two text files. So I'm not sure what that bit is doing, what I thought that was doing was taking the differences in file 2 compared to file 1 and printing them to another file??
I dont have access to the machine at the moment but I should have privileges to read and write files as I do this all the time, after the first error I opened and saved LOGtoolnr.txt so the file actually exists now but it still can't be accessed.
How could i clean up my code to just print the differences to another file?
Thanks
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suppose one file
P1168S
P2150L
P85L
Q597R
R1097C
Another file
P2150L
P85L
Q597R
R1097C
R1379C
R1587K
Then output shud be
R1379C
R1587K
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SDIFF(1) GNU Tools SDIFF(1)
NAME
sdiff - find differences between two files and merge interactively
SYNOPSIS
sdiff -o outfile [options] from-file to-file
DESCRIPTION
The sdiff command merges two files and interactively outputs the results to outfile.
If from-file is a directory and to-file is not, sdiff compares the file in from-file whose file name is that of to-file, and vice versa.
from-file and to-file may not both be directories.
sdiff options begin with -, so normally from-file and to-file may not begin with -. However, -- as an argument by itself treats the
remaining arguments as file names even if they begin with -. You may not use - as an input file.
sdiff without -o (or --output) produces a side-by-side difference. This usage is obsolete; use diff --side-by-side instead.
Options
Below is a summary of all of the options that GNU sdiff accepts. Each option has two equivalent names, one of which is a single letter
preceded by -, and the other of which is a long name preceded by --. Multiple single letter options (unless they take an argument) can be
combined into a single command line argument. Long named options can be abbreviated to any unique prefix of their name.
-a Treat all files as text and compare them line-by-line, even if they do not appear to be text.
-b Ignore changes in amount of white space.
-B Ignore changes that just insert or delete blank lines.
-d Change the algorithm to perhaps find a smaller set of changes. This makes sdiff slower (sometimes much slower).
-H Use heuristics to speed handling of large files that have numerous scattered small changes.
--expand-tabs
Expand tabs to spaces in the output, to preserve the alignment of tabs in the input files.
-i Ignore changes in case; consider upper- and lower-case to be the same.
-I regexp
Ignore changes that just insert or delete lines that match regexp.
--ignore-all-space
Ignore white space when comparing lines.
--ignore-blank-lines
Ignore changes that just insert or delete blank lines.
--ignore-case
Ignore changes in case; consider upper- and lower-case to be the same.
--ignore-matching-lines=regexp
Ignore changes that just insert or delete lines that match regexp.
--ignore-space-change
Ignore changes in amount of white space.
-l
--left-column
Print only the left column of two common lines.
--minimal
Change the algorithm to perhaps find a smaller set of changes. This makes sdiff slower (sometimes much slower).
-o file
--output=file
Put merged output into file. This option is required for merging.
-s
--suppress-common-lines
Do not print common lines.
--speed-large-files
Use heuristics to speed handling of large files that have numerous scattered small changes.
-t Expand tabs to spaces in the output, to preserve the alignment of tabs in the input files.
--text Treat all files as text and compare them line-by-line, even if they do not appear to be text.
-v
--version
Output the version number of sdiff.
-w columns
--width=columns
Use an output width of columns. Note that for historical reasons, this option is -W in diff, -w in sdiff.
-W Ignore horizontal white space when comparing lines. Note that for historical reasons, this option is -w in diff, -W in sdiff.
SEE ALSO
cmp(1), comm(1), diff(1), diff3(1).
DIAGNOSTICS
An exit status of 0 means no differences were found, 1 means some differences were found, and 2 means trouble.
GNU Tools 22sep1993 SDIFF(1)