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diff \- differential file comparator
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tells what lines must be changed in two files to bring them
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then a file in that directory with basename the same as that of
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the other file is used.
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If both files are directories, similarly named files in the
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two directories are compared by the method of
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If more than two file names are given, then each argument is compared
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to the last argument as above.
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to process similarly named subdirectories recursively.
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When processing more than one file,
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prefixes file differences with a single line
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listing the two differing files, in the form of
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flag causes this behavior even when processing single files.
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The normal output contains lines of these forms:
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The numbers after the letters pertain to
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In fact, by exchanging `a' for `d' and reading backward
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one may ascertain equally how to convert
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are abbreviated as a single number.
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Following each of these lines come all the lines that are
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affected in the first file flagged by `<',
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then all the lines that are affected in the second file
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trailing blanks (spaces and tabs) to be ignored
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and other strings of blanks to compare equal.
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option causes all white-space to be removed from input lines
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before applying the difference algorithm.
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option prefixes each range with
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and inserts a space around the
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option produces a script of
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commands for the editor
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option produces a similar script,
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in the opposite order. It may, however, be
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useful as input to a stream-oriented post-processor.
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option includes three lines of context around each
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change, merging changes whose contexts overlap.
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flag displays the entire file as context.
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Except in rare circumstances,
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finds a smallest sufficient set of file
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Exit status is the empty string
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Editing scripts produced under the
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.BR -f " option are naive about"
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creating lines consisting of a single `\fB.\fR'.
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on directories, the notion of what is a text
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file is open to debate.
added
removed
diff/diff.1
