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       grepdiff [-n] [-p n] [--strip=n] [--addprefix=PREFIX] [-s]
                [-i PATTERN] [-x PATTERN] [-v]
                [--output-matching=WHAT] {REGEX} [file...]

       grepdiff {--help | --version | --list | --filter ...}


       For each file modified by a patch, if the patch hunk  con­
       tains the REGEX then the file's name is printed.

       The  regular  expression is treated as POSIX Basic Regular
       Expression syntax.

       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.


       -n     Display the line number that each patch begins  at.
              If  verbose output is requested, each matching hunk
              is listed as well.

              For each file that is modified, if a  hunk  matches
              then a line is generated containing the line number
              of the beginning of the patch, followed  by  a  Tab
              character, followed by the name of the file that is
              modified. If -v is given, following each  of  these
              lines will be one line for each matching hunk, con­
              sisting of a Tab character, the  line  number  that
              the  hunk  begins  at,  another  Tab character, the
              string ``Hunk #'', and the hunk number (starting at

       -p n   When matching, ignore the first n components of the

       -i PATTERN
              Include only files matching PATTERN.

       -x PATTERN
              Exclude files matching PATTERN.

              Display  the  matching  hunk-level  or   file-level

       --help Display a short usage message.

              Display the version number of grepdiff.

              Behave like filterdiff(1) instead.

       --list Behave like lsdiff(1) instead.


       filterdiff(1), lsdiff(1)


       Tim Waugh <twaugh@redhat.com>.

patchutils                  1 Mar 2003                GREPDIFF(1)

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