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- DIFF3 User Commands DIFF3
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- NNAAMMEE
- diff3 - 3-way differential file comparison
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- SSYYNNOOPPSSIISS
- ddiiffff33 [ --eexxEEXX33 ] file1 file2 file3
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- DDEESSCCRRIIPPTTIIOONN
- _D_i_f_f_3 compares three versions of a file, and publishes
- disagreeing ranges of text flagged with these codes:
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- ==== all three files differ
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- ====1 _f_i_l_e_1 is different
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- ====2 _f_i_l_e_2 is different
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- ====3 _f_i_l_e_3 is different
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- The type of change suffered in converting a given range of a
- given file to some other is indicated in one of these ways:
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- _f :: _n_1 aa Text is to be appended after line number _n_1
- in file _f, where _f = 1, 2, or 3.
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- _f :: _n_1 ,, _n_2 cc Text is to be changed in the range line _n_1
- to line _n_2. If _n_1 = _n_2, the range may be
- abbreviated to _n_1.
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- The original contents of the range follows immediately after
- a cc indication. When the contents of two files are identi-
- cal, the contents of the lower-numbered file is suppressed.
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- Under the --ee option, _d_i_f_f_3 publishes a script for the editor
- _e_d that will incorporate into _f_i_l_e_1 all changes between
- _f_i_l_e_2 and _f_i_l_e_3, _i._e. the changes that normally would be
- flagged ==== and ====3. Option --xx (--33) produces a script to
- incorporate only changes flagged ==== (====3). The follow-
- ing command will apply the resulting script to `file1'.
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- (cat script; echo '1,$p') | ed - file1
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- The --EE and --XX are similar to --ee and --xx, respectively, but
- treat overlapping changes (i.e., changes that would be
- flagged with ==== in the normal listing) differently. The
- overlapping lines from both files will be inserted by the
- edit script, bracketed by "<<<<<<" and ">>>>>>" lines.
-
- For example, suppose lines 7-8 are changed in both file1 and
- file2. Applying the edit script generated by the command
- "diff3 -E file1 file2 file3"
- to file1 results in the file:
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- Sprite v1.0 August 20, 1985 1
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- DIFF3 User Commands DIFF3
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- lines 1-6
- of file1
- <<<<<<< file1
- lines 7-8
- of file1
- =======
- lines 7-8
- of file3
- >>>>>>> file3
- rest of file1
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- The --EE option is used by RCS _m_e_r_g_e(1) to insure that over-
- lapping changes in the merged files are preserved and
- brought to someone's attention.
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- FFIILLEESS
- /tmp/d3?????
- /usr/lib/diff3
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- SSEEEE AALLSSOO
- diff(1)
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- BBUUGGSS
- Text lines that consist of a single `.' will defeat --ee..
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- Sprite v1.0 August 20, 1985 2
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