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diffutils d.8.1 cmp: some useful options undocumented
From: |
D. Hugh Redelmeier |
Subject: |
diffutils d.8.1 cmp: some useful options undocumented |
Date: |
Sun, 19 Jun 2005 17:22:26 -0400 (EDT) |
cmp(1) and info cmp have the same content. Neither document these flags
that are handled according to long_options in the source
99 {"print-bytes", 0, 0, 'b'},
100 {"print-chars", 0, 0, 'c'}, /* obsolescent as of diffutils 2.7.3 */
101 {"ignore-initial", 1, 0, 'i'},
102 {"verbose", 0, 0, 'l'},
103 {"bytes", 1, 0, 'n'},
104 {"silent", 0, 0, 's'},
105 {"quiet", 0, 0, 's'},
106 {"version", 0, 0, 'v'},
107 {"help", 0, 0, HELP_OPTION},
(-l and -s are documented, but not their long forms.)
I took a stab at documenting these flags, but I found that --help had
done a reasonable job. I think that this information should be
incorporated into cmp(1) and info cmp:
Usage: cmp [OPTION]... FILE1 [FILE2 [SKIP1 [SKIP2]]]
Compare two files byte by byte.
-b --print-bytes Print differing bytes.
-i SKIP --ignore-initial=SKIP Skip the first SKIP bytes of input.
-i SKIP1:SKIP2 --ignore-initial=SKIP1:SKIP2
Skip the first SKIP1 bytes of FILE1 and the first SKIP2 bytes of FILE2.
-l --verbose Output byte numbers and values of all differing bytes.
-n LIMIT --bytes=LIMIT Compare at most LIMIT bytes.
-s --quiet --silent Output nothing; yield exit status only.
-v --version Output version info.
--help Output this help.
SKIP1 and SKIP2 are the number of bytes to skip in each file.
SKIP values may be followed by the following multiplicative suffixes:
kB 1000, K 1024, MB 1,000,000, M 1,048,576,
GB 1,000,000,000, G 1,073,741,824, and so on for T, P, E, Z, Y.
If a FILE is `-' or missing, read standard input.
Report bugs to <address@hidden>.
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