59 lines
954 B
C
59 lines
954 B
C
/* $Header$ */
|
|
#include <stdio.h>
|
|
|
|
#define PMODE 0666
|
|
|
|
|
|
FILE *freopen(name,mode,fp)
|
|
char *name , *mode;
|
|
register FILE *fp;
|
|
{
|
|
char *malloc();
|
|
int fd,
|
|
flags = fp->_flags & ~(IO_WRITEMODE|IO_READMODE|IO_ERR|IO_EOF|IO_PERPRINTF);
|
|
|
|
fflush(fp);
|
|
close(fileno(fp));
|
|
|
|
switch(*mode){
|
|
|
|
case 'w':
|
|
flags |= IO_WRITEMODE;
|
|
fd = creat (name,PMODE);
|
|
break;
|
|
|
|
case 'a':
|
|
flags |= IO_WRITEMODE;
|
|
if (( fd = open(name, 1)) < 0 )
|
|
fd = creat(name, PMODE);
|
|
if (fd >= 0) lseek(fd,0L,2);
|
|
break;
|
|
|
|
case 'r':
|
|
flags |= IO_READMODE;
|
|
fd = open(name, 0);
|
|
break;
|
|
|
|
default:
|
|
fd = -1;
|
|
}
|
|
|
|
if (fd < 0) {
|
|
register int i;
|
|
|
|
for (i = 0; i < _NFILES; i++) {
|
|
if (fp == _io_table[i]) {
|
|
_io_table[i] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (fp != &_stdin && fp != &_stdout && fp != &_stderr) free(fp);
|
|
return NULL;
|
|
}
|
|
fp->_count = 0;
|
|
if (fp->_buf && (flags | IO_WRITEMODE)) fp->_count = BUFSIZ;
|
|
fp->_fd = fd;
|
|
fp->_flags = flags;
|
|
return(fp);
|
|
}
|