# phpman > man > filterdiff(1) [FILTERDIFF(1)](https://www.chedong.com/phpMan.php/man/FILTERDIFF/1/markdown) Man pages [FILTERDIFF(1)](https://www.chedong.com/phpMan.php/man/FILTERDIFF/1/markdown) ## NAME filterdiff - extract or exclude diffs from a diff file ## SYNOPSIS **filterdiff** [[-i _PATTERN_] | [--include=_PATTERN_]] [[-I _FILE_] | [--include-from-file=_FILE_]] [[-p _n_] | [--strip-match=_n_]] [--strip=_n_] [--addprefix=_PREFIX_] [--addoldprefix=_PREFIX_] [--addnewprefix=_PREFIX_] [[-x _PATTERN_] | [--exclude=_PATTERN_]] [[-X _FILE_] | [--exclude-from-file=_FILE_]] [[-v] | [--verbose]] [--clean] [[-z] | [--decompress]] [[-# _RANGE_] | [--hunks=_RANGE_]] [--lines=_RANGE_] [[-F_RANGE_] | [--files=_RANGE_]] [--annotate] [--format=_FORMAT_] [--as-numbered-lines=_WHEN_] [--remove-timestamps] [_file_...] **filterdiff** {[--help] | [--version] | [--list] | [--grep ...]} ## DESCRIPTION You can use filterdiff to obtain a patch that applies to files matching the shell wildcard _PATTERN_ from a larger collection of patches. For example, to see the patches in patch-2.4.3.gz that apply to all files called lp.c: filterdiff -z -i '*/lp.c' patch-2.4.3.gz If neither **-i** nor **-x** options are given, **-i** **'*'** is assumed. This way **filterdiff** can be used to clean up an existing diff file, removing redundant lines from the beginning (eg. the text from the mail body) or between the chunks (eg. in CVS diffs). To extract pure patch data, use a command like this: filterdiff message-with-diff-in-the-body > patch Note that the interpretation of the shell wildcard pattern does not count slash characters or periods as special (in other words, no flags are given to **fnmatch**). This is so that “*/basename”-type patterns can be given without limiting the number of pathname components. You can use both unified and context format diffs with this program. ## OPTIONS ### -i --include= Include only files matching _PATTERN_. All other lines in the input are suppressed. ### -I --include-from-file= Include only files matching any pattern listed in _FILE_, one pattern per line. All other lines in the input are suppressed. ### -x --exclude= Exclude files matching _PATTERN_. All other lines in the input are displayed. ### -X --exclude-from-file= Exclude files matching any pattern listed in _FILE_, one pattern per line. All other lines in the input are displayed. ### -p --strip-match= When matching, ignore the first _n_ components of the pathname. **-#** _RANGE_, **--hunks**=_RANGE_ Only include hunks within the specified _RANGE_. Hunks are numbered from 1, and the range is a comma-separated list of numbers or “first-last” spans, optionally preceded by a modifier 'x' which inverts the entire range; either the first or the last in the span may be omitted to indicate no limit in that direction. **--lines**=_RANGE_ Only include hunks that contain lines from the original file that lie within the specified _RANGE_. Lines are numbered from 1, and the range is a comma-separated list of numbers or “first-last” spans, optionally preceded by a modifier 'x' which inverts the entire range; either the first or the last in the span may be omitted to indicate no limit in that direction. ### -F --files Only include files indicated by the specified _RANGE_. Files are numbered from 1 in the order they appear in the patch input, and the range is a comma-separated list of numbers or “first-last” spans, optionally preceded by a modifier 'x' which inverts the entire range; either the first or the last in the span may be omitted to indicate no limit in that direction. ### --annotate Annotate each hunk with the filename and hunk number. **--format**=unified|context Use specified output format. **--strip**=_n_ Remove the first _n_ components of pathnames in the output. **--addprefix**=_PREFIX_ Prefix pathnames in the output by _PREFIX_. This will override any individual settings specified with the **--addoldprefix** or **--addnewprefix** options. **--addoldprefix**=_PREFIX_ Prefix pathnames for old or original files in the output by _PREFIX_. **--addnewprefix**=_PREFIX_ Prefix pathnames for updated or new files in the output by _PREFIX_. **--as-numbered-lines**=before|after Instead of a patch fragment, display the lines of the selected hunks with the line number of the file before (or after) the patch is applied, followed by a TAB character and a colon, at the beginning of each line. Each hunk except the first will have a line consisting of “...” before it. ### --remove-timestamps Do not include file timestamps in the output. ### -v --verbose Always show non-diff lines in the output. By default, non-diff lines are only shown when excluding a filename pattern. ### --clean Always remove all non-diff lines from the output. Even when excluding a filename pattern. ### -z --decompress Decompress files with extensions .gz and .bz2. ### --help Display a short usage message. ### --version Display the version number of filterdiff. ### --list Behave like [**lsdiff**(1)](https://www.chedong.com/phpMan.php/man/lsdiff/1/markdown) instead. ### --grep Behave like [**grepdiff**(1)](https://www.chedong.com/phpMan.php/man/grepdiff/1/markdown) instead. ## EXAMPLES To see all patch hunks that affect the first five lines of a C file: filterdiff -i '*.c' --lines=-5 < patch To see the first hunk of each file patch, use: filterdiff -#1 patchfile To see patches modifying a ChangeLog file in a subdirectory, use: filterdiff -p1 Changelog To see the complete patches for each patch that modifies line 1 of the original file, use: filterdiff --lines=1 patchfile | lsdiff | \ xargs -rn1 filterdiff patchfile -i To see all but the first hunk of a particular patch, you might use: filterdiff -p1 -i file.c -#2- foo-patch If you have a very specific list of hunks in a patch that you want to see, list them: filterdiff -#1,2,5-8,10,12,27- To see the lines of the files that would be patched as they will appear after the patch is applied, use: filterdiff --as-numbered-lines=after patch.file You can see the same context before the patch is applied with: filterdiff --as-numbered-lines=before patch.file Filterdiff can also be used to convert between unified and context format diffs: filterdiff -v --format=unified context.diff ## SEE ALSO [**lsdiff**(1)](https://www.chedong.com/phpMan.php/man/lsdiff/1/markdown), [**grepdiff**(1)](https://www.chedong.com/phpMan.php/man/grepdiff/1/markdown), [**patchview**(1)](https://www.chedong.com/phpMan.php/man/patchview/1/markdown) ## AUTHOR **Tim** **Waugh** <> Package maintainer patchutils 23 Jan 2009 [FILTERDIFF(1)](https://www.chedong.com/phpMan.php/man/FILTERDIFF/1/markdown)