BSD 4_3 release

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

/*
* Copyright (c) 1982, 1986 Regents of the University of California.
* All rights reserved.  The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*
*      @(#)copy.c      7.1 (Berkeley) 6/5/86
*/

/*
* Copy from to in 10K units.
* Intended for use in system
* installation.
*/
main()
{
       int from, to;
       char fbuf[50], tbuf[50];
       char buffer[10240];
       register int record;
       extern int errno;

       from = getdev("From", fbuf, 0);
       to = getdev("To", tbuf, 1);
       for (record = 0; ; record++) {
               int rcc, wcc;

               rcc = read(from, buffer, sizeof (buffer));
               if (rcc == 0)
                       break;
               if (rcc < 0) {
                       printf("Record %d: read error, errno=%d\n",
                               record, errno);
                       break;
               }
               if (rcc < sizeof (buffer))
                       printf("Record %d: read short; expected %d, got %d\n",
                               record, sizeof (buffer), rcc);
               /*
                * For bug in ht driver.
                */
               if (rcc > sizeof (buffer))
                       rcc = sizeof (buffer);
               wcc = write(to, buffer, rcc);
               if (wcc < 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);
       /* can't call exit here */
}

getdev(prompt, buf, mode)
       char *prompt, *buf;
       int mode;
{
       register int i;

       do {
               printf("%s: ", prompt);
               gets(buf);
               i = open(buf, mode);
       } while (i <= 0);
       return (i);
}