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Annotation of 43BSDReno/lib/libpc/RESET.c, revision 1.1.1.1

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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