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Annotation of 43BSDReno/lib/libpc/RESET.c, revision 1.1

1.1     ! root        1: /*-
        !             2:  * Copyright (c) 1979 The 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: (1) source distributions retain this entire copyright
        !             7:  * notice and comment, and (2) distributions including binaries display
        !             8:  * the following acknowledgement:  ``This product includes software
        !             9:  * developed by the University of California, Berkeley and its contributors''
        !            10:  * in the documentation or other materials provided with the distribution
        !            11:  * and in all advertising materials mentioning features or use of this
        !            12:  * software. Neither the name of the University nor the names of its
        !            13:  * contributors may be used to endorse or promote products derived
        !            14:  * from this software without specific prior written permission.
        !            15:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            16:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            17:  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            18:  */
        !            19: 
        !            20: #ifndef lint
        !            21: static char sccsid[] = "@(#)RESET.c    1.9 (Berkeley) 4/9/90";
        !            22: #endif /* not lint */
        !            23: 
        !            24: #include "h00vars.h"
        !            25: 
        !            26: RESET(filep, name, maxnamlen, datasize)
        !            27: 
        !            28:        register struct iorec   *filep;
        !            29:        char                    *name;
        !            30:        long                    maxnamlen;
        !            31:        long                    datasize;
        !            32: {
        !            33:        if (name == NULL && filep == INPUT && filep->fname[0] == '\0') {
        !            34:                if (fseek(filep->fbuf, (long)0, 0) == -1) {
        !            35:                        PERROR("Could not reset ", filep->pfname);
        !            36:                        return;
        !            37:                }
        !            38:                filep->funit &= ~EOFF;
        !            39:                filep->funit |= (SYNC | EOLN);
        !            40:                return;
        !            41:        }
        !            42:        filep = GETNAME(filep, name, maxnamlen, datasize);
        !            43:        filep->fbuf = fopen(filep->fname, "r");
        !            44:        if (filep->fbuf == NULL) {
        !            45:                /*
        !            46:                 * This allows unnamed temp files to be opened even if
        !            47:                 * they have not been rewritten yet. We decided to remove
        !            48:                 * this feature since the standard requires that files be
        !            49:                 * defined before being reset.
        !            50:                 *
        !            51:                if (filep->funit & TEMP) {
        !            52:                        filep->funit |= (EOFF | SYNC | FREAD);
        !            53:                        return;
        !            54:                }
        !            55:                 */
        !            56:                PERROR("Could not open ", filep->pfname);
        !            57:                return;
        !            58:        }
        !            59:        filep->funit |= (SYNC | FREAD);
        !            60:        if (filep->funit & FTEXT)
        !            61:                filep->funit |= EOLN;
        !            62:        if (filep->fblk > PREDEF) {
        !            63:                setbuf(filep->fbuf, &filep->buf[0]);
        !            64:        }
        !            65: }

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