usr/src/sys/stand.att/copy.c

/*-
 * Copyright (c) 1982, 1986, 1988, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *      @(#)copy.c      8.1 (Berkeley) %G%
 */

#define BSIZE   10240

/*
 * Copy from from to to.  Intended for use in system installation.
 */
main()
{
        extern int errno;
        register int from, to, record, rcc, wcc, bsize = BSIZE;
        char buf[BSIZE];

        from = getfile("From", 0);
        to = getfile("To", 1);
        for (record = 0;; ++record) {
                if (!(rcc = read(from, buf, bsize)))
                        break;
                if (rcc < 0) {
                        printf("Record %d: read error, errno=%d\n",
                            record, errno);
                        break;
                }
                if (rcc != bsize) {
                        if (record == 0) {
                                bsize = rcc;
                                printf("Block size set from input; %d bytes\n",
                                    bsize);
                        } else
                                printf("Record %d: read short; expected %d, got %d\n",
                                    record, bsize, rcc);
                }
#ifdef vax
                /* For bug in ht driver. */
                if (rcc > bsize)
                        rcc = bsize;
#endif
                if ((wcc = write(to, buf, rcc)) < 0) {
                        printf("Record %d: write error: errno=%d\n",
                            record, errno);
                        break;
                }
                if (wcc < rcc) {
                        printf("Record %d: write short; expected %d, got %d\n",
                            record, rcc, wcc);
                        break;
                }
        }
        printf("copy completed: %d records copied\n", record);
}