28 lines
509 B
C
28 lines
509 B
C
|
/* $Source$
|
||
|
|
* $State$
|
||
|
|
* $Revision$
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include "libsys.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Say whether a particular fd is currently open in text or binary mode.
|
||
|
|
* Assume that the fd is valid. Return O_TEXT or O_BINARY.
|
||
|
|
*/
|
||
|
|
int _sys_getmode(int fd)
|
||
|
|
{
|
||
|
|
int reqbegfd = fd & ~_FDVECMASK;
|
||
|
|
struct _fdmodes *p = &_sys_fdmodes;
|
||
|
|
_fdvec_t mask;
|
||
|
|
|
||
|
|
while (p->begfd != reqbegfd)
|
||
|
|
{
|
||
|
|
p = p->next;
|
||
|
|
if (!p)
|
||
|
|
return O_TEXT;
|
||
|
|
}
|
||
|
|
mask = (_fdvec_t)1 << (fd & _FDVECMASK);
|
||
|
|
return (p->modevec & mask) ? O_BINARY : O_TEXT;
|
||
|
|
}
|