BSD 4 release

[unix-history] / usr / src / lib / libpc / RESET.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)RESET.c 1.1 10/29/80";

#include "h00vars.h"
#include "h01errs.h"

RESET(filep, name, maxnamlen, datasize)

       register struct iorec   *filep;
       char                    *name;
       int                     maxnamlen;
       int                     datasize;
{
       if (name == NULL && filep == INPUT && filep->fname[0] == '\0') {
               if (rewind(filep->fbuf)) {
                       ERROR(ESEEK, filep->pfname);
                       return;
               }
               filep->funit &= ~(EOFF | EOLN);
               filep->funit |= SYNC;
               return;
       }
       filep = GETNAME(filep, name, maxnamlen, datasize);
       filep->fbuf = fopen(filep->fname, "r");
       if (filep->fbuf == NULL) {
               if (filep->funit & TEMP) {
                       filep->funit |= (EOFF | SYNC | FREAD);
                       return;
               }
               ERROR(EOPEN, filep->pfname);
               return;
       }
       filep->funit |= (SYNC | FREAD);
       if (filep->fblk > PREDEF) {
               setbuf(filep->fbuf, &filep->buf[0]);
       }
}