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Annotation of Net2/stand/copy.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1982, 1986, 1988 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms, with or without
        !             6:  * modification, are permitted provided that the following conditions
        !             7:  * are met:
        !             8:  * 1. Redistributions of source code must retain the above copyright
        !             9:  *    notice, this list of conditions and the following disclaimer.
        !            10:  * 2. Redistributions in binary form must reproduce the above copyright
        !            11:  *    notice, this list of conditions and the following disclaimer in the
        !            12:  *    documentation and/or other materials provided with the distribution.
        !            13:  * 3. All advertising materials mentioning features or use of this software
        !            14:  *    must display the following acknowledgement:
        !            15:  *     This product includes software developed by the University of
        !            16:  *     California, Berkeley and its contributors.
        !            17:  * 4. Neither the name of the University nor the names of its contributors
        !            18:  *    may be used to endorse or promote products derived from this software
        !            19:  *    without specific prior written permission.
        !            20:  *
        !            21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
        !            22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
        !            23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
        !            24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
        !            25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
        !            26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
        !            27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
        !            28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
        !            29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
        !            30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
        !            31:  * SUCH DAMAGE.
        !            32:  *
        !            33:  *     @(#)copy.c      7.7 (Berkeley) 5/21/91
        !            34:  */
        !            35: 
        !            36: #define        BSIZE   10240
        !            37: 
        !            38: /*
        !            39:  * Copy from from to to.  Intended for use in system installation.
        !            40:  */
        !            41: main()
        !            42: {
        !            43:        extern int errno;
        !            44:        register int from, to, record, rcc, wcc, bsize = BSIZE;
        !            45:        char buf[BSIZE];
        !            46: 
        !            47:        from = getfile("From", 0);
        !            48:        to = getfile("To", 1);
        !            49:        for (record = 0;; ++record) {
        !            50:                if (!(rcc = read(from, buf, bsize)))
        !            51:                        break;
        !            52:                if (rcc < 0) {
        !            53:                        printf("Record %d: read error, errno=%d\n",
        !            54:                            record, errno);
        !            55:                        break;
        !            56:                }
        !            57:                if (rcc != bsize) {
        !            58:                        if (record == 0) {
        !            59:                                bsize = rcc;
        !            60:                                printf("Block size set from input; %d bytes\n",
        !            61:                                    bsize);
        !            62:                        } else
        !            63:                                printf("Record %d: read short; expected %d, got %d\n",
        !            64:                                    record, bsize, rcc);
        !            65:                }
        !            66: #ifdef vax
        !            67:                /* For bug in ht driver. */
        !            68:                if (rcc > bsize)
        !            69:                        rcc = bsize;
        !            70: #endif
        !            71:                if ((wcc = write(to, buf, rcc)) < 0) {
        !            72:                        printf("Record %d: write error: errno=%d\n",
        !            73:                            record, errno);
        !            74:                        break;
        !            75:                }
        !            76:                if (wcc < rcc) {
        !            77:                        printf("Record %d: write short; expected %d, got %d\n",
        !            78:                            record, rcc, wcc);
        !            79:                        break;
        !            80:                }
        !            81:        }
        !            82:        printf("copy completed: %d records copied\n", record);
        !            83: }

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