# man > GREPDIFF(1) [GREPDIFF(1)](https://www.chedong.com/phpMan.php/man/GREPDIFF/1/markdown) Man pages [GREPDIFF(1)](https://www.chedong.com/phpMan.php/man/GREPDIFF/1/markdown) ## NAME grepdiff - show files modified by a diff containing a regex ## SYNOPSIS **grepdiff** [[-n] | [--line-number]] [[-N] | [--number-files]] [[-p _n_] | [--strip-match=_n_]] [--strip=_n_] [--addprefix=_PREFIX_] [--addoldprefix=_PREFIX_] [--addnewprefix=_PREFIX_] [[-s] | [--status]] [[-i _PATTERN_] | [--include=_PATTERN_]] [[-I _FILE_] | [--include-from-file=_FILE_]] [[-x _PATTERN_] | [--exclude=_PATTERN_]] [[-X _FILE_] | [--exclude-from-file=_FILE_]] [[-# _RANGE_] | [--hunks=_RANGE_]] [--lines=_RANGE_] [[-F_RANGE_] | [--files=_RANGE_]] [--annotate] [--as-numbered-lines=_WHEN_] [--format=_FORMAT_] [--remove-timestamps] [[-v] | [--verbose]] [[-z] | [--decompress]] [[-E] | [--extended-regexp]] [[-H] | [--with-filename]] [[-h] | [--no-filename]] [--output-matching=_WHAT_] [--only-match=_WHAT_] {[_REGEX_] | [-f _FILE_]} [_file_...] **grepdiff** {[--help] | [--version] | [--list] | [--filter ...]} ## DESCRIPTION For each file modified by a patch, if the patch hunk contains the _REGEX_ then the file's name is printed. The regular expression is treated as POSIX Basic Regular Expression syntax, unless the **-E** option is given in which case POSIX Extended Regular Expression syntax is used. For example, to see the patches in my.patch which contain the regular expression “pf_gfp_mask”, use: grepdiff pf_gfp_mask my.patch | \ xargs -rn1 filterdiff my.patch -i You can use both unified and context format diffs with this program. ## OPTIONS ### -n --line-number Display the line number that each patch begins at. If verbose output is requested, each matching hunk is listed as well. For a description of the output format see [**lsdiff**(1)](https://www.chedong.com/phpMan.php/man/lsdiff/1/markdown). ### -N --number-files File numbers are listed, beginning at 1, before each filename. ### -p --strip-match= When matching, ignore the first _n_ components of the pathname. **--strip**=_n_ Remove the first _n_ components of the pathname before displaying it. **--addprefix**=_PREFIX_ Prefix the pathname with _PREFIX_ before displaying it. 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_. ### -s Show file additions, modifications and removals. A file addition is indicated by a “+”, a removal by a “-”, and a modification by a “!”. ### -i --include= Include only files matching _PATTERN_. ### -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_. ### -X --exclude-from-file= Exclude files matching any pattern listed in _FILE_, one pattern per line. All other lines in the input are displayed. **-#** _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 list 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 list 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. **--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. **--format**=unified|context Use specified output format. ### --remove-timestamps Do not include file timestamps in the output. ### -z --decompress Decompress files with extensions .gz and .bz2. ### -E --extended-regexp Use POSIX Extended Regular Expression syntax. ### -H --with-filename Print the name of the patch file containing each match. ### -h --no-filename Suppress the name of the patch file containing each match. ### -f --file= Read regular expressions from _FILE_, one per line. **--output-matching**=hunk|file Display the matching hunk-level or file-level diffs. **--only-match**=rem|removals|add|additions|mod|modifications|all Limit regex matching to removals, additions, modifications or the whole hunk. ### --help Display a short usage message. ### --version Display the version number of grepdiff. ### --filter Behave like [**filterdiff**(1)](https://www.chedong.com/phpMan.php/man/filterdiff/1/markdown) instead. ### --list Behave like [**lsdiff**(1)](https://www.chedong.com/phpMan.php/man/lsdiff/1/markdown) instead. ## SEE ALSO [**filterdiff**(1)](https://www.chedong.com/phpMan.php/man/filterdiff/1/markdown), [**lsdiff**(1)](https://www.chedong.com/phpMan.php/man/lsdiff/1/markdown), [**patchview**(1)](https://www.chedong.com/phpMan.php/man/patchview/1/markdown) ## AUTHOR **Tim** **Waugh** <> Package maintainer patchutils 10 Feb 2011 [GREPDIFF(1)](https://www.chedong.com/phpMan.php/man/GREPDIFF/1/markdown)