1 /*- 2 * Copyright (c) 1991 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * James W. Williams of the University of Maryland. 7 * 8 * %sccs.include.redist.c% 9 */ 10 11 #ifndef lint 12 char copyright[] = 13 "@(#) Copyright (c) 1991 The Regents of the University of California.\n\ 14 All rights reserved.\n"; 15 #endif /* not lint */ 16 17 #ifndef lint 18 static char sccsid[] = "@(#)cksum.c 5.1 (Berkeley) 03/08/91"; 19 #endif /* not lint */ 20 21 #include <sys/types.h> 22 #include <errno.h> 23 #include <fcntl.h> 24 #include <stdio.h> 25 #include <unistd.h> 26 #include <stdlib.h> 27 #include <string.h> 28 29 u_long crctab[] = { 30 0x7fffffff, 31 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 32 0xe963a535, 0x9e6495a3, 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 33 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, 34 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 35 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, 0x136c9856, 0x646ba8c0, 36 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 37 0x8d080df5, 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 38 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, 0x35b5a8fa, 39 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 40 0xdcd60dcf, 0xabd13d59, 0x26d930ac, 0x51de003a, 0xc8d75180, 41 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, 42 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 43 0x58684c11, 0xc1611dab, 0xb6662d3d, 0x76dc4190, 0x01db7106, 44 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 45 0xe8b8d433, 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 46 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, 0x6b6b51f4, 47 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 48 0x8208f4c1, 0xf50fc457, 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 49 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, 50 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 51 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, 0x4369e96a, 0x346ed9fc, 52 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 53 0xdd0d7cc9, 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 54 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, 0x5edef90e, 55 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 56 0xb7bd5c3b, 0xc0ba6cad, 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 57 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, 58 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 59 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, 0xf00f9344, 0x8708a3d2, 60 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 61 0x6e6b06e7, 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 62 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, 0xd6d6a3e8, 63 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 64 0x3fb506dd, 0x48b2364b, 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 65 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, 66 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 67 0xbb0b4703, 0x220216b9, 0x5505262f, 0xc5ba3bbe, 0xb2bd0b28, 68 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 69 0x5bdeae1d, 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 70 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, 0x95bf4a82, 71 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 72 0x7cdcefb7, 0x0bdbdf21, 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 73 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, 74 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 75 0xf862ae69, 0x616bffd3, 0x166ccf45, 0xa00ae278, 0xd70dd2ee, 76 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 77 0x3e6e77db, 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 78 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, 0xbdbdf21c, 79 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 80 0x54de5729, 0x23d967bf, 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 81 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d 82 }; 83 84 main(argc, argv) 85 int argc; 86 char **argv; 87 { 88 extern int optind; 89 register int ch, fd, rval; 90 char *fn; 91 92 while ((ch = getopt(argc, argv, "")) != EOF) 93 switch(ch) { 94 case '?': 95 default: 96 usage(); 97 } 98 argc -= optind; 99 argv += optind; 100 101 fd = STDIN_FILENO; 102 fn = "stdin"; 103 rval = 0; 104 do { 105 if (*argv) { 106 fn = *argv++; 107 if ((fd = open(fn, O_RDONLY, 0)) < 0) { 108 (void)fprintf(stderr, 109 "cksum: %s: %s\n", fn, strerror(errno)); 110 rval = 1; 111 continue; 112 } 113 } 114 rval |= crc(fd, fn); 115 (void)close(fd); 116 } while (*argv); 117 exit(rval); 118 } 119 120 crc(fd, fn) 121 register int fd; 122 char *fn; 123 { 124 register int i, nr, step; 125 register u_char *p; 126 register u_long crc, total; 127 u_char buf[8192]; 128 129 crc = step = total = 0; 130 while ((nr = read(fd, buf, sizeof(buf))) > 0) 131 for (total += nr, p = buf; nr--;) { 132 if (!(i = crc >> 24 ^ *p++)) { 133 i = step++; 134 if (step >= sizeof(crctab)/sizeof(crctab[0])) 135 step = 0; 136 } 137 crc = (crc << 8) ^ crctab[i]; 138 } 139 if (nr < 0) { 140 (void)fprintf(stderr, "cksum: %s: %s\n", fn, strerror(errno)); 141 return(1); 142 } 143 144 crc &= 0xffffffff; /* Mask to 32 bits. */ 145 146 (void)printf("%lu %lu %s\n", crc, total, fn); 147 return(0); 148 } 149 150 usage() 151 { 152 (void)fprintf(stderr, "usage: cksum [file ...]\n"); 153 exit(1); 154 } 155