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Annotation of 43BSDTahoe/sys/stand/docopy.c, revision 1.1.1.1

1.1       root        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) 6/29/88
                     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: }

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