install approved copyright notice

[unix-history] / usr / src / local / local.cmd / 20b.c

/*
* Copyright (c) 1986 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley.  The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/

#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1986 Regents of the University of California.\n\
All rights reserved.\n";
#endif /* not lint */

#ifndef lint
static char sccsid[] = "@(#)20b.c       5.4 (Berkeley) %G%";
#endif /* not lint */

#include <stdio.h>

main(argc, argv)
       int argc;
       char **argv;
{
       register int bsize, cc, want;
       register char *base, *current;
       char *alloca();

       if (argc > 1) {
               bsize = atoi(argv[1]);
               if (bsize <= 0) {
                       fputs("20b: bad block size.\n", stderr);
                       exit(-1);
               }
       }
       base = alloca(bsize);
       for (cc = bsize; cc > 0;) {
               current = base;
               for (want = bsize; want > 0 && cc > 0; want -= cc) {
                       if ((cc = read(0, current, want)) < 0)
                               return(-1);
                       current += cc;
               }
               want = bsize - want;
               if (want && write(1, base, want) != want)
                       return(-1);
       }
       return(0);
}