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