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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#pragma ident "%Z%%M% %I% %E% SMI"
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <locale.h>
#include <libgen.h>
#define NBUF 4096 /* Read this much at a time */
#define BSIZE 512 /* Bytes per block */
typedef unsigned long CRC; /* 32 bit (at least) crc size */
static uchar_t buf[NBUF]; /* Input buffer */
static uchar_t tflag; /* More than one input file */
static uchar_t many;
static CRC filecrc; /* CRC for this file */
static CRC totcrc; /* Total of all files */
static long long totbytes; /* Total bytes read */
static ulong_t bsize = 1; /* block size */
static int sum(const char *fn);
static int usage(void);
static CRC docrcposix(CRC crcval, uchar_t *bp, ulong_t n);
static CRC postprocess(CRC S, long long n);
static CRC (*crcfunc)(CRC crcval, uchar_t *bp, ulong_t n) = docrcposix;
static void m_crcposix(ulong_t *, const uchar_t *, size_t);
/*
* Mainline for cksum.
*/
int
main(int argc, char *argv[])
{
int c;
int exstat = 0;
(void) setlocale(LC_ALL, "");
#if !defined(TEXT_DOMAIN)
#define TEXT_DOMAIN "SYS_TEST"
#endif
(void) textdomain(TEXT_DOMAIN);
tflag = many = 0;
totbytes = totcrc = 0;
while ((c = getopt(argc, argv, "")) != -1) {
switch (c) {
case 't': /* this is non-functional for now */
tflag++;
break;
default:
return (usage());
}
}
/* Sum from standard input? */
if ((many = optind < argc) == 0)
return (sum(NULL));
/* Sum each file argument. */
for (; optind < argc; ++optind)
exstat |= sum(argv[optind]);
if (tflag) {
(void) printf("%lu", postprocess(totcrc, totbytes));
(void) printf(gettext("\t%lld\t Total\n"),
(long long)((totbytes + bsize - 1) / bsize));
}
return (exstat);
}
/*
* Compute checksum for one file.
*/
static int
sum(const char *fn)
{
int n;
int fd;
long long bytes = 0;
if (fn == NULL || (fn[0] == '-' && fn[1] == '\0'))
fd = 0;
else if ((fd = open(fn, O_RDONLY)) < 0) {
(void) fprintf(stderr, gettext("cksum: input file \"%s\": "),
fn);
perror("");
return (1);
}
filecrc = 0;
while ((n = read(fd, (char *)buf, sizeof (buf))) > 0) {
bytes += n;
filecrc = (*crcfunc) (filecrc, buf, n);
if (tflag)
totcrc = (*crcfunc) (totcrc, buf, n);
}
(void) close(fd);
totbytes += bytes;
(void) printf("%lu", postprocess(filecrc, bytes));
(void) printf("\t%lld", (long long)((bytes + bsize - 1) / bsize));
if (many) {
(void) printf("\t%s", (fn[0] == '-' && fn[1] == '\0') ?
gettext("[standard input]") : fn);
}
if (n < 0)
(void) fputs(gettext(" [read error]"), stdout);
(void) putchar('\n');
return (n == 0 ? 0 : 1);
}
/*
* Do CRC-POSIX function by calling a library entry point that has a
* slightly different calling sequence.
*/
static CRC
docrcposix(CRC crcval, uchar_t *bp, ulong_t n)
{
m_crcposix(&crcval, bp, n);
return (crcval);
}
/*
* Sum algorithms require various kinds of post-processing.
* The 'S' and 'R' variables are from the POSIX.2 (Draft 8?) description
* of the "sum" utility.
* This code makes no assumption about word size except that a
* "CRC" type holds at least 32 bits.
*/
static CRC
postprocess(CRC S, long long n)
{
/*
* POSIX tacks on significant bytes of the length so that
* different length sequences of '\0' have different sums;
* then it complements sum.
*/
uchar_t char_n[sizeof (n)];
ulong_t i;
for (i = 0; n != 0; n >>= 8, ++i)
char_n[i] = n & 0xFF;
return (~docrcposix(S, char_n, i));
}
/*
* usage message for cksum
*/
static int
usage()
{
(void) fprintf(stderr, gettext("Usage: cksum [file ...]\n"));
return (2);
}
/*
* crcposix -- compute posix.2 compatable 32 bit CRC
*
* The POSIX.2 (draft 10) CRC algorithm.
* This is a 32 bit CRC with polynomial
* 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 + x**0
*/
/* layout is from the POSIX.2 Rationale */
static ulong_t crctab_posix[256] = {
0x00000000,
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
};
/*
* crcposix -- compute posix.2 compatible 32 bit CRC
*/
void
m_crcposix(crcp, bp, n)
ulong_t *crcp;
const uchar_t *bp;
size_t n;
{
while (n-- > 0)
*crcp = (*crcp<<8) ^ crctab_posix[(uchar_t)((*crcp>>24)^*bp++)];
}
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