date and time created 80/12/21 16:51:04 by wnj

[unix-history] / usr / src / lib / libc / stdio / freopen.c

/* @(#)freopen.c        4.1 (Berkeley) %G% */
#include <stdio.h>

FILE *
freopen(file, mode, iop)
char *file;
register char *mode;
register FILE *iop;
{
       register f;

       fclose(iop);
       if (*mode=='w')
               f = creat(file, 0666);
       else if (*mode=='a') {
               if ((f = open(file, 1)) < 0)
                       f = creat(file, 0666);
               lseek(f, 0L, 2);
       } else
               f = open(file, 0);
       if (f < 0)
               return(NULL);
       iop->_file = f;
       if (*mode != 'r')
               iop->_flag |= _IOWRT;
       else
               iop->_flag |= _IOREAD;
       return(iop);
}