[unix-history] / usr / src / sys / stand / copy.c

/*-
* Copyright (c) 1993 The Regents of the University of California.
* All rights reserved.
*
* %sccs.include.redist.c%
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1993 The Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)copy.c      7.1 (Berkeley) %G%";
#endif /* not lint */

#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);
}