diff
(1g)
Name
diff - compare files line by line
Synopsis
diff [OPTION]... FILES
Description
User Commands DIFF(1)
NAME
diff - compare files line by line
SYNOPSIS
diff [OPTION]... FILES
DESCRIPTION
Compare files line by line.
-i --ignore-case
Ignore case differences in file contents.
--ignore-file-name-case
Ignore case when comparing file names.
--no-ignore-file-name-case
Consider case when comparing file names.
-E --ignore-tab-expansion
Ignore changes due to tab expansion.
-b --ignore-space-change
Ignore changes in the amount of white space.
-w --ignore-all-space
Ignore all white space.
-B --ignore-blank-lines
Ignore changes whose lines are all blank.
-I RE --ignore-matching-lines=RE
Ignore changes whose lines all match RE.
--strip-trailing-cr
Strip trailing carriage return on input.
-a --text
Treat all files as text.
-c -C NUM --context[=NUM]
Output NUM (default 3) lines of copied context.
-u -U NUM --unified[=NUM]
Output NUM (default 3) lines of unified context.
--label LABEL
Use LABEL instead of file name.
-p --show-c-function
Show which C function each change is in.
-F RE --show-function-line=RE
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User Commands DIFF(1)
Show the most recent line matching RE.
-q --brief
Output only whether files differ.
-e --ed
Output an ed script.
--normal
Output a normal diff.
-n --rcs
Output an RCS format diff.
-y --side-by-side
Output in two columns.
-W NUM --width=NUM
Output at most NUM (default 130) print columns.
--left-column
Output only the left column of common lines.
--suppress-common-lines
Do not output common lines.
-D NAME --ifdef=NAME
Output merged file to show `#ifdef NAME' diffs.
--GTYPE-group-format=GFMT
Similar, but format GTYPE input groups with GFMT.
--line-format=LFMT
Similar, but format all input lines with LFMT.
--LTYPE-line-format=LFMT
Similar, but format LTYPE input lines with LFMT.
LTYPE is `old', `new', or `unchanged'.
GTYPE is LTYPE or `changed'.
GFMT may contain:
%< lines from FILE1
%> lines from FILE2
%= lines common to FILE1 and FILE2
%[-][WIDTH][.[PREC]]{doxX}LETTER
printf-style spec for LETTER
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User Commands DIFF(1)
LETTERs are as follows for new group, lower case for
old group:
F first line number
L last line number
N number of lines = L-F+1
E F-1
M L+1
LFMT may contain:
%L contents of line
%l contents of line, excluding any trailing newline
%[-][WIDTH][.[PREC]]{doxX}n
printf-style spec for input line number
Either GFMT or LFMT may contain:
%% %
%c'C'
the single character C
%c'\OOO'
the character with octal code OOO
-l --paginate
Pass the output through `pr' to paginate it.
-t --expand-tabs
Expand tabs to spaces in output.
-T --initial-tab
Make tabs line up by prepending a tab.
--tabsize=NUM
Tab stops are every NUM (default 8) print columns.
-r --recursive
Recursively compare any subdirectories found.
-N --new-file
Treat absent files as empty.
--unidirectional-new-file
Treat absent first files as empty.
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User Commands DIFF(1)
-s --report-identical-files
Report when two files are the same.
-x PAT --exclude=PAT
Exclude files that match PAT.
-X FILE --exclude-from=FILE
Exclude files that match any pattern in FILE.
-S FILE --starting-file=FILE
Start with FILE when comparing directories.
--from-file=FILE1
Compare FILE1 to all operands. FILE1 can be a direc-
tory.
--to-file=FILE2
Compare all operands to FILE2. FILE2 can be a direc-
tory.
--horizon-lines=NUM
Keep NUM lines of the common prefix and suffix.
-d --minimal
Try hard to find a smaller set of changes.
--speed-large-files
Assume large files and many scattered small changes.
-v --version
Output version info.
--help
Output this help.
FILES are `FILE1 FILE2' or `DIR1 DIR2' or `DIR FILE...' or
`FILE... DIR'. If --from-file or --to-file is given, there
are no restrictions on FILES. If a FILE is `-', read stan-
dard input. Exit status is 0 if inputs are the same, 1 if
different, 2 if trouble.
AUTHOR
Written by Paul Eggert, Mike Haertel, David Hayes, Richard
Stallman, and Len Tower.
REPORTING BUGS
Report bugs to <bug-gnu-utils@gnu.org>.
COPYRIGHT
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying condi-
tions. There is NO warranty; not even for MERCHANTABILITY
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User Commands DIFF(1)
or FITNESS FOR A PARTICULAR PURPOSE.
ATTRIBUTES
See attributes(5) for descriptions of the following
attributes:
+---------------+--------------------+
|ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+---------------+--------------------+
|Availability | text/gnu-diffutils |
+---------------+--------------------+
|Stability | Uncommitted |
+---------------+--------------------+
SEE ALSO
The full documentation for diff is maintained as a Texinfo
manual. If the info and diff programs are properly
installed at your site, the command
info diff
should give you access to the complete manual.
NOTES
This software was built from source available at
https://java.net/projects/solaris-userland. The original
community source was downloaded from
http://alpha.gnu.org/gnu/diffutils/diffutils-2.8.7.tar.gz
Further information about this software can be found on the
open source community website at http://www.gnu.org/soft-
ware/diffutils/.
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