43 lines
774 B
C
43 lines
774 B
C
|
/* $Source$
|
||
|
|
* $State$
|
||
|
|
* $Revision$
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include "libsys.h"
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Set or reset the "end-of-file encountered" indicator for a particular fd.
|
||
|
|
* Assume that the fd is valid, and is being read from in text mode.
|
||
|
|
*/
|
||
|
|
int _sys_seteof(int fd, int eof)
|
||
|
|
{
|
||
|
|
int reqbegfd = fd & ~_FDVECMASK;
|
||
|
|
struct _fdmodes *p = &_sys_fdmodes;
|
||
|
|
_fdvec_t mask;
|
||
|
|
|
||
|
|
while (p->begfd != reqbegfd)
|
||
|
|
{
|
||
|
|
p = p->next;
|
||
|
|
if (!p)
|
||
|
|
{
|
||
|
|
if (!eof)
|
||
|
|
return 0;
|
||
|
|
if ((p = sbrk(sizeof(struct _fdmodes)))
|
||
|
|
== OUT_OF_MEMORY)
|
||
|
|
return -1;
|
||
|
|
p->next = _sys_fdmodes.next;
|
||
|
|
p->begfd = reqbegfd;
|
||
|
|
p->modevec = p->eofvec = 0;
|
||
|
|
_sys_fdmodes.next = p;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mask = (_fdvec_t)1 << (fd & _FDVECMASK);
|
||
|
|
if (eof)
|
||
|
|
p->eofvec |= mask;
|
||
|
|
else
|
||
|
|
p->eofvec &= ~mask;
|
||
|
|
return 0;
|
||
|
|
}
|