crc.doc

通讯程序源码

     CCCCRRRRCCCC((((1111))))		OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy	IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))		CCCCRRRRCCCC((((1111))))



     NNNNAAAAMMMMEEEE
	  crc -	checksum files

     SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS
	  ccccrrrrcccc file ...

     DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
	  For each file, _c_r_c calculates	and prints a 32-bit CRC, the
	  byte count, and the file name.  It is	typically used to
	  validate files transferred between different systems,	and is
	  useful in detecting subtle disk corruption.  _C_r_c uses	a
	  checksum compatible with the DOS version of crc, the 32 bit
	  CRC used by PKZIP version 0.9, as well as the	"crc" command
	  in ZCOMM and Professional-YAM	(high reliability
	  communications programs).

	  The 32-bit CRC used is the frame check sequence in ADCCP
	  (ANSI	X3.66, also known as FIPS PUB 71 and FED-STD-1003, the
	  U.S. versions	of CCITT's X.25	link-level protocol).

	  32 bit CRC code courtesy Gary	S. Brown.

     BBBBUUUUGGGGSSSS
	  Although extremely unlikely, files with different data may
	  still	produce	the same crc value.

     SSSSEEEEEEEE AAAALLLLSSSSOOOO
	  chek(1), undos(OMEN),	todos(OMEN), tocpm(OMEN), sum(1),
	  wc(1).


























     Page 1					     (printed 9/15/91)