1 /* 2 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 3 * Use is subject to license terms. 4 */ 5 6 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 7 /* All Rights Reserved */ 8 9 10 /* 11 * Copyright (c) 1980 Regents of the University of California. 12 * All rights reserved. The Berkeley software License Agreement 13 * specifies the terms and conditions for redistribution. 14 */ 15 16 #pragma ident "%Z%%M% %I% %E% SMI" 17 18 /* 19 * Sum bytes in file mod 2^16 20 */ 21 22 #include <stdio.h> 23 24 int 25 main(int argc, char **argv) 26 { 27 unsigned int sum; 28 int i, c; 29 FILE *f; 30 long long nbytes; 31 int errflg = 0; 32 33 i = 1; 34 do { 35 if (i < argc) { 36 if ((f = fopen(argv[i], "r")) == NULL) { 37 (void) fprintf(stderr, 38 "sum: Can't open %s\n", argv[i]); 39 errflg += 10; 40 continue; 41 } 42 } else 43 f = stdin; 44 sum = 0; 45 nbytes = 0; 46 while ((c = getc(f)) != EOF) { 47 nbytes++; 48 if (sum&01) 49 sum = (sum>>1) + 0x8000; 50 else 51 sum >>= 1; 52 sum += c; 53 sum &= 0xFFFF; 54 } 55 if (ferror(f)) { 56 errflg++; 57 (void) fprintf(stderr, 58 "sum: read error on %s\n", 59 argc > 1 ? argv[i] : "-"); 60 } 61 62 (void) printf("%05u %5lld", sum, 63 (nbytes + BUFSIZ - 1) / BUFSIZ); 64 if (argc > 2) 65 (void) printf(" %s", argv[i]); 66 (void) printf("\n"); 67 (void) fclose(f); 68 } while (++i < argc); 69 70 return (errflg); 71 } 72