src/usr.bin/cmp, branch release/9.3.0

Eliminate unneeded headers.

2011-06-21T20:44:06Z

Remove the advertising clause from UCB copyrighted files in usr.bin. This

2010-12-11T08:32:16Z

is in accordance with the information provided at ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change Also add $FreeBSD$ to a few files to keep svn happy. Discussed with: imp, rwatson

Revert most part of 200420 as requested, as more review and polish is

2009-12-13T03:14:06Z

needed.

Remove unneeded header includes from usr.bin/ except contributed code.

2009-12-11T23:35:38Z

Tested with: make universe

add __unused to succeed at WARNS=6

2008-07-10T13:26:46Z

Refine markup and add the EXIT STATUS section where appropriate.

2006-12-19T10:34:14Z

-mdoc sweep.

2005-11-18T10:36:29Z

Add a -h option to tell cmp not to follow symbolic links.

2005-08-23T13:13:13Z

MFC after: 3 weeks Sponsored by: Sophos/ActiveState

phk added the -x option in May 2000, but only for regular files; for

2003-06-19T07:24:26Z

special files it was treated like -l. This commit adds the -x option in for special files as well. PR: bin/46249 Submitted by: Colin Percival

The cmp utility has the questionable feature of using mmap when

2003-02-26T06:44:46Z

comparing regular files. Add a SIGSEGV handler to make its behavior less surprising when a read error occurs. The handler does not attempt to distinguish errors from file truncation, but anyone actively modifying a file while trying to compare it shouldn't even expect something sane to happen. PR: 45391 Reviewed by: mike (mentor)