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Annotation of 43BSDTahoe/sys/vaxdist/20b.c, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1986 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: 
                     18: #ifndef lint
                     19: char copyright[] =
                     20: "@(#) Copyright (c) 1986 Regents of the University of California.\n\
                     21:  All rights reserved.\n";
                     22: #endif /* not lint */
                     23: 
                     24: #ifndef lint
                     25: static char sccsid[] = "@(#)20b.c      5.5 (Berkeley) 6/29/88";
                     26: #endif /* not lint */
                     27: 
                     28: #include <stdio.h>
                     29: 
                     30: main(argc, argv)
                     31:        int argc;
                     32:        char **argv;
                     33: {
                     34:        register int bsize, cc, want;
                     35:        register char *base, *current;
                     36:        char *alloca();
                     37: 
                     38:        if (argc > 1) {
                     39:                bsize = atoi(argv[1]);
                     40:                if (bsize <= 0) {
                     41:                        fputs("20b: bad block size.\n", stderr);
                     42:                        exit(-1);
                     43:                }
                     44:        }
                     45:        else
                     46:                bsize = 20 * 512;
                     47:        base = alloca(bsize);
                     48:        for (cc = bsize; cc > 0;) {
                     49:                current = base;
                     50:                for (want = bsize; want > 0 && cc > 0; want -= cc) {
                     51:                        if ((cc = read(0, current, want)) < 0)
                     52:                                return(-1);
                     53:                        current += cc;
                     54:                }
                     55:                want = bsize - want;
                     56:                if (want && write(1, base, want) != want)
                     57:                        return(-1);
                     58:        }
                     59:        return(0);
                     60: }

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