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man page(1) manual page
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sdiff - find differences between two files and merge interactively
sdiff -o outfile [options] from-file to-file
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This usage is obsolete; use diff --side-by-side instead.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 reg_exp.
- --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 reg_exp.
- --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.
cmp(1)
, comm(1)
, diff(1)
, diff3(1)
.
An exit status of 0 means no differences were found, 1 means some differences
were found, and 2 means trouble.
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