1 /* 2 * Copyright (c) 1988 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that the above copyright notice and this paragraph are 7 * duplicated in all such forms and that any documentation, 8 * advertising materials, and other materials related to such 9 * distribution and use acknowledge that the software was developed 10 * by the University of California, Berkeley. The name of the 11 * University may not be used to endorse or promote products derived 12 * from this software without specific prior written permission. 13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED 15 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. 16 * 17 * @(#)docopy.c 7.2 (Berkeley) 06/29/88 18 */ 19 20 #define SIZE 10240 21 22 docopy(from, to, nrecs) 23 register int from, to, nrecs; 24 { 25 register int record, rcc, wcc; 26 char buf[SIZE]; 27 28 for (record = 0;;) { 29 if (!(rcc = read(from, buffer, SIZE))) 30 break; 31 if (rcc < 0) { 32 printf("Record %d: read error, errno=%d\n", 33 record, errno); 34 break; 35 } 36 if (rcc < SIZE) 37 printf("Record %d: read short; expected %d, got %d\n", 38 record, SIZE, rcc); 39 #ifdef vax 40 /* For bug in ht driver. */ 41 if (rcc > SIZE) 42 rcc = SIZE; 43 #endif 44 if ((wcc = write(to, buffer, rcc)) < 0) { 45 printf("Record %d: write error: errno=%d\n", 46 record, errno); 47 break; 48 } 49 if (wcc < rcc) { 50 printf("Record %d: write short; expected %d, got %d\n", 51 record, rcc, wcc); 52 break; 53 } 54 if (nrecs > 0 && ++record == nrecs) 55 break; 56 } 57 printf("copy completed: %d records copied\n", record); 58 } 59