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I'm trying to locate the header + object file of cksum in Mac OS X, but with no lack. Any suggestions?

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The source code for the program /usr/bin/cksum is available on Apple's Open Source web site, which you could have found by googling for cksum.c.

If you're looking for the functions this program uses, it's a good idea to start there.

Copies of these header files are in /Developer/SDKs/MacOSX10.6.sdk/usr/include, if you have the Mac OS X Developer Tools installed.

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