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.TH CMP 1
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.SH NAME
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cmp \- compare two files
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.SH SYNOPSIS
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.B cmp
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[
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.B -lLs
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]
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.I file1 file2
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[
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.I offset1
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[
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.I offset2
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]
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]
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.SH DESCRIPTION
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.I Cmp
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compares the two files and prints
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a message if the contents differ.
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.PP
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The options are:
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.TP
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.B -l
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Print the byte number (decimal) and the
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differing bytes (hexadecimal) for each difference.
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.TP
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.B -L
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Print the line number of the first differing byte.
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.TP
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.B -s
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Print nothing for differing files,
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but set the exit status.
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.PD
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.PP
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If offsets are given,
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comparison starts at the designated byte position
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of the corresponding file.
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Offsets that begin with
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.B 0x
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are hexadecimal;
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with
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.BR 0 ,
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octal; with anything else, decimal.
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.SH SOURCE
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.B /sys/src/cmd/cmp.c
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.SH SEE ALSO
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.IR diff (1)
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.SH DIAGNOSTICS
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If a file is inaccessible or missing, the exit status is
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.LR open .
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If the files are the same, the exit status is empty (true).
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If they are the same except that one is longer than the other, the exit status is
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.LR EOF .
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Otherwise
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.I cmp
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reports the position of the first disagreeing byte and the exit status is
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.LR differ .