33 lines
950 B
Groff
33 lines
950 B
Groff
.TH CRC 1 OMEN
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.SH NAME
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crc \- checksum files
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.SH SYNOPSIS
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.B crc
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file ...
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.SH DESCRIPTION
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For each file,
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.I crc\^
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calculates and prints a 32-bit CRC,
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the byte count, and the file name.
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It is typically used to validate files transferred between
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different systems, and is useful in detecting subtle disk corruption.
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.I Crc\^
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uses a checksum compatible with the
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DOS
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version of crc,
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the 32 bit CRC used by PKZIP version 0.9,
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as well as the "crc" command in ZCOMM and Professional-YAM
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(high reliability communications programs).
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The 32-bit CRC used is the frame
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check sequence in ADCCP (ANSI X3.66, also known as FIPS PUB 71
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and FED-STD-1003, the U.S. versions of CCITT's X.25 link-level
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protocol).
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32 bit CRC code courtesy Gary S. Brown.
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.SH BUGS
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Although extremely unlikely,
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files with different data may still produce the same crc value.
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.SH "SEE ALSO"
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chek(1), undos(OMEN), todos(OMEN), tocpm(OMEN), sum(1), wc(1).
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