BSD 4.4 Lite Usr.bin Sources

8 files changed, 692 insertions, 0 deletions

diff --git a/usr.bin/cksum/Makefile b/usr.bin/cksum/Makefile
new file mode 100644
index 0000000..d2f09b7
--- /dev/null
+++ b/usr.bin/cksum/Makefile
@@ -0,0 +1,6 @@
+#	@(#)Makefile	8.1 (Berkeley) 6/6/93
+
+PROG=	cksum
+SRCS=	cksum.c crc.c print.c sum1.c sum2.c
+
+.include <bsd.prog.mk>
diff --git a/usr.bin/cksum/cksum.1 b/usr.bin/cksum/cksum.1
new file mode 100644
index 0000000..7c2cc24
--- /dev/null
+++ b/usr.bin/cksum/cksum.1
@@ -0,0 +1,164 @@
+.\" 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	8.1 (Berkeley) 6/29/93
+.\"
+.Dd June 29, 1993
+.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 ...
+.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 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
+utility exits 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 0000000..3e66ca5
--- /dev/null
+++ b/usr.bin/cksum/cksum.c
@@ -0,0 +1,124 @@
+/*-
+ * 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	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/cdefs.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include "extern.h"
+
+void usage __P((void));
+
+int
+main(argc, argv)
+	int argc;
+	char **argv;
+{
+	extern int optind;
+	u_long len, val;
+	register int ch, fd, rval;
+	char *fn;
+	int (*cfncn) __P((int, unsigned long *, unsigned long *));
+	void (*pfncn) __P((char *, unsigned long, unsigned long));
+
+	cfncn = crc;
+	pfncn = pcrc;
+	while ((ch = getopt(argc, argv, "o:")) != EOF)
+		switch(ch) {
+		case 'o':
+			if (*optarg == '1') {
+				cfncn = csum1;
+				pfncn = psum1;
+			} else if (*optarg == '2') {
+				cfncn = csum2;
+				pfncn = psum2;
+			} else {
+				(void)fprintf(stderr,
+				    "cksum: illegal argument to -o option\n");
+				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) {
+				(void)fprintf(stderr, "cksum: %s: %s\n",
+				    fn, strerror(errno));
+				rval = 1;
+				continue;
+			}
+		}
+		if (cfncn(fd, &val, &len)) {
+			(void)fprintf(stderr, "cksum: %s: %s\n",
+			    fn ? fn : "stdin", strerror(errno));
+			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);
+}
diff --git a/usr.bin/cksum/crc.c b/usr.bin/cksum/crc.c
new file mode 100644
index 0000000..2a5eb6d
--- /dev/null
+++ b/usr.bin/cksum/crc.c
@@ -0,0 +1,140 @@
+/*-
+ * 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 sccsid[] = "@(#)crc.c	8.1 (Berkeley) 6/17/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <unistd.h>
+
+static u_long crctab[] = {
+	0x0,
+	0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b,
+	0x1a864db2, 0x1e475005, 0x2608edb8, 0x22c9f00f, 0x2f8ad6d6,
+	0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
+	0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac,
+	0x5bd4b01b, 0x569796c2, 0x52568b75, 0x6a1936c8, 0x6ed82b7f,
+	0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a,
+	0x745e66cd, 0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039,
+	0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5, 0xbe2b5b58,
+	0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033,
+	0xa4ad16ea, 0xa06c0b5d, 0xd4326d90, 0xd0f37027, 0xddb056fe,
+	0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
+	0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4,
+	0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d, 0x34867077, 0x30476dc0,
+	0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5,
+	0x2ac12072, 0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16,
+	0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca, 0x7897ab07,
+	0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c,
+	0x6211e6b5, 0x66d0fb02, 0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1,
+	0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
+	0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b,
+	0xbb60adfc, 0xb6238b25, 0xb2e29692, 0x8aad2b2f, 0x8e6c3698,
+	0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d,
+	0x94ea7b2a, 0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e,
+	0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2, 0xc6bcf05f,
+	0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34,
+	0xdc3abded, 0xd8fba05a, 0x690ce0ee, 0x6dcdfd59, 0x608edb80,
+	0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
+	0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a,
+	0x58c1663d, 0x558240e4, 0x51435d53, 0x251d3b9e, 0x21dc2629,
+	0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c,
+	0x3b5a6b9b, 0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff,
+	0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623, 0xf12f560e,
+	0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65,
+	0xeba91bbc, 0xef68060b, 0xd727bbb6, 0xd3e6a601, 0xdea580d8,
+	0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
+	0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2,
+	0xaafbe615, 0xa7b8c0cc, 0xa379dd7b, 0x9b3660c6, 0x9ff77d71,
+	0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74,
+	0x857130c3, 0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640,
+	0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c, 0x7b827d21,
+	0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a,
+	0x61043093, 0x65c52d24, 0x119b4be9, 0x155a565e, 0x18197087,
+	0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
+	0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d,
+	0x2056cd3a, 0x2d15ebe3, 0x29d4f654, 0xc5a92679, 0xc1683bce,
+	0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb,
+	0xdbee767c, 0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18,
+	0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4, 0x89b8fd09,
+	0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662,
+	0x933eb0bb, 0x97ffad0c, 0xafb010b1, 0xab710d06, 0xa6322bdf,
+	0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4
+};
+
+/*
+ * Compute a POSIX 1003.2 checksum.  This routine has been broken out so that
+ * other programs can use it.  It takes a file descriptor to read from and
+ * locations to store the crc and the number of bytes read.  It returns 0 on
+ * success and 1 on failure.  Errno is set on failure.
+ */
+u_long crc_total = ~0;			/* The crc over a number of files. */
+
+int
+crc(fd, cval, clen)
+	register int fd;
+	u_long *cval, *clen;
+{
+	register u_char *p;
+	register int nr;
+	register u_long crc, len;
+	u_char buf[16 * 1024];
+
+#define	COMPUTE(var, ch)	(var) = (var) << 8 ^ crctab[(var) >> 24 ^ (ch)]
+
+	crc = len = 0;
+	crc_total = ~crc_total;
+	while ((nr = read(fd, buf, sizeof(buf))) > 0)
+		for (len += nr, p = buf; nr--; ++p) {
+			COMPUTE(crc, *p);
+			COMPUTE(crc_total, *p);
+		}
+	if (nr < 0)
+		return (1);
+
+	*clen = len;
+
+	/* Include the length of the file. */
+	for (; len != 0; len >>= 8) {
+		COMPUTE(crc, len & 0xff);
+		COMPUTE(crc_total, len & 0xff);
+	}
+
+	*cval = ~crc;
+	crc_total = ~crc_total;
+	return (0);
+}
diff --git a/usr.bin/cksum/extern.h b/usr.bin/cksum/extern.h
new file mode 100644
index 0000000..ed61120
--- /dev/null
+++ b/usr.bin/cksum/extern.h
@@ -0,0 +1,45 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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.
+ *
+ *	@(#)extern.h	8.1 (Berkeley) 6/6/93
+ */
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+int	crc __P((int, unsigned long *, unsigned long *));
+void	pcrc __P((char *, unsigned long, unsigned long));
+void	psum1 __P((char *, unsigned long, unsigned long));
+void	psum2 __P((char *, unsigned long, unsigned long));
+int	csum1 __P((int, unsigned long *, unsigned long *));
+int	csum2 __P((int, unsigned long *, unsigned long *));
+__END_DECLS
diff --git a/usr.bin/cksum/print.c b/usr.bin/cksum/print.c
new file mode 100644
index 0000000..d0ffeb3
--- /dev/null
+++ b/usr.bin/cksum/print.c
@@ -0,0 +1,73 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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 sccsid[] = "@(#)print.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <stdio.h>
+#include "extern.h"
+
+void
+pcrc(fn, val, len)
+	char *fn;
+	u_long val, len;
+{
+	(void)printf("%lu %lu", val, len);
+	if (fn)
+		(void)printf(" %s", fn);
+	(void)printf("\n");
+}
+
+void
+psum1(fn, val, len)
+	char *fn;
+	u_long val, len;
+{
+	(void)printf("%lu %lu", val, (len + 1023) / 1024);
+	if (fn)
+		(void)printf(" %s", fn);
+	(void)printf("\n");
+}
+
+void
+psum2(fn, val, len)
+	char *fn;
+	u_long val, len;
+{
+	(void)printf("%lu %lu", val, (len + 511) / 512);
+	if (fn)
+		(void)printf(" %s", fn);
+	(void)printf("\n");
+}
diff --git a/usr.bin/cksum/sum1.c b/usr.bin/cksum/sum1.c
new file mode 100644
index 0000000..19eeebe
--- /dev/null
+++ b/usr.bin/cksum/sum1.c
@@ -0,0 +1,69 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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 sccsid[] = "@(#)sum1.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <unistd.h>
+
+int
+csum1(fd, cval, clen)
+	register int fd;
+	u_long *cval, *clen;
+{
+	register u_long total;
+	register int nr;
+	register u_int crc;
+	register u_char *p;
+	u_char buf[8192];
+
+	/*
+	 * 16-bit checksum, rotating right before each addition;
+	 * overflow is discarded.
+	 */
+	crc = total = 0;
+	while ((nr = read(fd, buf, sizeof(buf))) > 0)
+		for (total += nr, p = buf; nr--; ++p) {
+			if (crc & 1)
+				crc |= 0x10000;
+			crc = ((crc >> 1) + *p) & 0xffff;
+		}
+	if (nr < 0)
+		return(1);
+
+	*cval = crc;
+	*clen = total;
+	return(0);
+}
diff --git a/usr.bin/cksum/sum2.c b/usr.bin/cksum/sum2.c
new file mode 100644
index 0000000..c54d88e
--- /dev/null
+++ b/usr.bin/cksum/sum2.c
@@ -0,0 +1,71 @@
+/*-
+ * Copyright (c) 1991, 1993
+ *	The Regents of the University of California.  All rights reserved.
+ *
+ * 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 sccsid[] = "@(#)sum2.c	8.1 (Berkeley) 6/6/93";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <unistd.h>
+
+int
+csum2(fd, cval, clen)
+	register int fd;
+	u_long *cval, *clen;
+{
+	register u_long crc, total;
+	register int nr;
+	register u_char *p;
+	u_char buf[8192];
+
+	/*
+	 * Draft 8 POSIX 1003.2:
+	 *
+	 *   s = sum of all bytes
+	 *   r = s % 2^16 + (s % 2^32) / 2^16
+	 * crc = (r % 2^16) + r / 2^16
+	 */
+	crc = total = 0;
+	while ((nr = read(fd, buf, sizeof(buf))) > 0)
+		for (total += nr, p = buf; nr--; ++p)
+			crc += *p;
+	if (nr < 0)
+		return(1);
+
+	crc = (crc & 0xffff) + (crc >> 16);
+	crc = (crc & 0xffff) + (crc >> 16);
+
+	*cval = crc;
+	*clen = total;
+	return(0);
+}