Import Lite2's src/usr.bin/cksum. The Makefile is still on the vendor

branch and will temporarily give bogus hard links cksum[.1] -> sum[.1].

3 files changed, 317 insertions, 0 deletions

diff --git a/usr.bin/cksum/Makefile b/usr.bin/cksum/Makefile
new file mode 100644
index 000000000000..ee680bec72ad
--- /dev/null
+++ b/usr.bin/cksum/Makefile
@@ -0,0 +1,8 @@
+#	@(#)Makefile	8.2 (Berkeley) 4/28/95
+
+PROG=	cksum
+SRCS=	cksum.c crc.c print.c sum1.c sum2.c
+LINKS=	${BINDIR}/cksum ${BINDIR}/sum
+MLINKS=	cksum.1 sum.1
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/cksum/cksum.1 b/usr.bin/cksum/cksum.1
new file mode 100644
index 000000000000..f5f292bfb13f
--- /dev/null
+++ b/usr.bin/cksum/cksum.1
@@ -0,0 +1,176 @@
+.\" Copyright (c) 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" the Institute of Electrical and Electronics Engineers, Inc.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. All advertising materials mentioning features or use of this software
+.\"    must display the following acknowledgement:
+.\"	This product includes software developed by the University of
+.\"	California, Berkeley and its contributors.
+.\" 4. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"	@(#)cksum.1	8.2 (Berkeley) 4/28/95
+.\"
+.Dd April 28, 1995
+.Dt CKSUM 1
+.Os BSD 4.4
+.Sh NAME
+.Nm cksum
+.Nd display file checksums and block counts
+.Sh SYNOPSIS
+.Nm cksum
+.Op Fl o Op \&1 \&| \&2
+.Op Ar file ...
+.Nm sum
+.Op Ar file ...
+.Sh DESCRIPTION
+The
+.Nm cksum
+utility writes to the standard output three whitespace separated
+fields for each input file.
+These fields are a checksum
+.Tn CRC ,
+the total number of octets in the file and the file name.
+If no file name is specified, the standard input is used and no file name
+is written.
+.Pp
+The
+.Nm sum
+utility is identical to the
+.Nm cksum
+utility, except that it defaults to using historic algorithm 1, as
+described below.
+It is provided for compatibility only.
+.Pp
+The options are as follows:
+.Bl -tag -width indent
+.It Fl o
+Use historic algorithms instead of the (superior) default one.
+.Pp
+Algorithm 1 is the algorithm used by historic
+.Bx
+systems as the 
+.Xr sum 1
+algorithm and by historic
+.At V
+systems as the
+.Xr sum
+algorithm when using the
+.Fl r
+option.
+This is a 16-bit checksum, with a right rotation before each addition;
+overflow is discarded.
+.Pp
+Algorithm 2 is the algorithm used by historic
+.At V
+systems as the
+default
+.Xr sum
+algorithm.
+This is a 32-bit checksum, and is defined as follows:
+.Bd -unfilled -offset indent
+s = sum of all bytes;
+r = s % 2^16 + (s % 2^32) / 2^16;
+cksum = (r % 2^16) + r / 2^16;
+.Ed
+.Pp
+Both algorithm 1 and 2 write to the standard output the same fields as
+the default algorithm except that the size of the file in bytes is
+replaced with the size of the file in blocks.
+For historic reasons, the block size is 1024 for algorithm 1 and 512
+for algorithm 2.
+Partial blocks are rounded up.
+.El
+.Pp
+The default
+.Tn CRC
+used is based on the polynomial used for
+.Tn CRC
+error checking
+in the networking standard
+.St -iso8802-3
+The
+.Tn CRC
+checksum encoding is defined by the generating polynomial:
+.Pp
+.Bd -unfilled -offset indent
+G(x) = x^32 + x^26 + x^23 + x^22 + x^16 + x^12 +
+     x^11 + x^10 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1
+.Ed
+.Pp
+Mathematically, the
+.Tn CRC
+value corresponding to a given file is defined by
+the following procedure:
+.Bd -filled -offset indent
+The
+.Ar n
+bits to be evaluated are considered to be the coefficients of a mod 2
+polynomial M(x) of degree
+.Ar n Ns \-1 .
+These
+.Ar n
+bits are the bits from the file, with the most significant bit being the most
+significant bit of the first octet of the file and the last bit being the least
+significant bit of the last octet, padded with zero bits (if necessary) to
+achieve an integral number of octets, followed by one or more octets
+representing the length of the file as a binary value, least significant octet
+first.
+The smallest number of octets capable of representing this integer are used.
+.Pp
+M(x) is multiplied by x^32 (i.e., shifted left 32 bits) and divided by
+G(x) using mod 2 division, producing a remainder R(x) of degree <= 31.
+.Pp
+The coefficients of R(x) are considered to be a 32-bit sequence.
+.Pp
+The bit sequence is complemented and the result is the CRC.
+.Ed
+.Pp
+The
+.Nm cksum
+and
+.Nm sum
+utilities exit 0 on success, and >0 if an error occurs.
+.Sh SEE ALSO
+The default calculation is identical to that given in pseudo-code
+in the following
+.Tn ACM
+article.
+.Rs
+.%T "Computation of Cyclic Redundancy Checks Via Table Lookup"
+.%A Dilip V. Sarwate
+.%J "Communications of the \\*(tNACM\\*(sP"
+.%D "August 1988"
+.Re
+.Sh STANDARDS
+The
+.Nm cksum
+utility is expected to be POSIX 1003.2 compatible.
+.Sh HISTORY
+The
+.Nm cksum
+utility appears in
+.Bx 4.4 .
diff --git a/usr.bin/cksum/cksum.c b/usr.bin/cksum/cksum.c
new file mode 100644
index 000000000000..9b8e81a1189c
--- /dev/null
+++ b/usr.bin/cksum/cksum.c
@@ -0,0 +1,133 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * James W. Williams of NASA Goddard Space Flight Center.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char copyright[] =
+"@(#) Copyright (c) 1991, 1993\n\
+	The Regents of the University of California.  All rights reserved.\n";
+#endif /* not lint */
+
+#ifndef lint
+static char sccsid[] = "@(#)cksum.c	8.2 (Berkeley) 4/28/95";
+#endif /* not lint */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "extern.h"
+
+void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	register int ch, fd, rval;
+	u_long len, val;
+	char *fn, *p;
+	int (*cfncn) __P((int, unsigned long *, unsigned long *));
+	void (*pfncn) __P((char *, unsigned long, unsigned long));
+
+	if ((p = rindex(argv[0], '/')) == NULL)
+		p = argv[0];
+	else
+		++p;
+	if (*p == 'c') {
+		cfncn = crc;
+		pfncn = pcrc;
+	} else {
+		cfncn = csum1;
+		pfncn = psum1;
+	}
+
+	while ((ch = getopt(argc, argv, "o:")) != -1)
+		switch (ch) {
+		case 'o':
+			if (!strcmp(optarg, "1")) {
+				cfncn = csum1;
+				pfncn = psum1;
+			} else if (!strcmp(optarg, "2")) {
+				cfncn = csum2;
+				pfncn = psum2;
+			} else {
+				warnx("illegal argument to -o option");
+				usage();
+			}
+			break;
+		case '?':
+		default:
+			usage();
+		}
+	argc -= optind;
+	argv += optind;
+
+	fd = STDIN_FILENO;
+	fn = NULL;
+	rval = 0;
+	do {
+		if (*argv) {
+			fn = *argv++;
+			if ((fd = open(fn, O_RDONLY, 0)) < 0) {
+				warn("%s", fn);
+				rval = 1;
+				continue;
+			}
+		}
+		if (cfncn(fd, &val, &len)) {
+			warn("%s", fn ? fn : "stdin");
+			rval = 1;
+		} else
+			pfncn(fn, val, len);
+		(void)close(fd);
+	} while (*argv);
+	exit(rval);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: cksum [-o 1 | 2] [file ...]\n");
+	exit(1);
+}