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Annotation of 42BSD/usr.lib/libpc/RESET.c, revision 1.1

1.1     ! root        1: /* Copyright (c) 1979 Regents of the University of California */
        !             2: 
        !             3: static char sccsid[] = "@(#)RESET.c 1.7 7/23/82";
        !             4: 
        !             5: #include "h00vars.h"
        !             6: 
        !             7: RESET(filep, name, maxnamlen, datasize)
        !             8: 
        !             9:        register struct iorec   *filep;
        !            10:        char                    *name;
        !            11:        long                    maxnamlen;
        !            12:        long                    datasize;
        !            13: {
        !            14:        if (name == NULL && filep == INPUT && filep->fname[0] == '\0') {
        !            15:                if (fseek(filep->fbuf, (long)0, 0)) {
        !            16:                        PERROR("Could not reset ", filep->pfname);
        !            17:                        return;
        !            18:                }
        !            19:                filep->funit &= ~EOFF;
        !            20:                filep->funit |= (SYNC | EOLN);
        !            21:                return;
        !            22:        }
        !            23:        filep = GETNAME(filep, name, maxnamlen, datasize);
        !            24:        filep->fbuf = fopen(filep->fname, "r");
        !            25:        if (filep->fbuf == NULL) {
        !            26:                /*
        !            27:                 * This allows unnamed temp files to be opened even if
        !            28:                 * they have not been rewritten yet. We decided to remove
        !            29:                 * this feature since the standard requires that files be
        !            30:                 * defined before being reset.
        !            31:                 *
        !            32:                if (filep->funit & TEMP) {
        !            33:                        filep->funit |= (EOFF | SYNC | FREAD);
        !            34:                        return;
        !            35:                }
        !            36:                 */
        !            37:                PERROR("Could not open ", filep->pfname);
        !            38:                return;
        !            39:        }
        !            40:        filep->funit |= (SYNC | FREAD);
        !            41:        if (filep->funit & FTEXT)
        !            42:                filep->funit |= EOLN;
        !            43:        if (filep->fblk > PREDEF) {
        !            44:                setbuf(filep->fbuf, &filep->buf[0]);
        !            45:        }
        !            46: }

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