int fcntl(int fd, int cmd, ...)
{
FAR struct file *filep;
va_list ap;
int ret;
/* fcntl() is a cancellation point */
(void)enter_cancellation_point();
/* Setup to access the variable argument list */
va_start(ap, cmd);
/* Did we get a valid file descriptor? */
#if CONFIG_NFILE_DESCRIPTORS > 0
if ((unsigned int)fd < CONFIG_NFILE_DESCRIPTORS) {
/* Get the file structure corresponding to the file descriptor. */
filep = fs_getfilep(fd);
if (!filep) {
/* The errno value has already been set */
va_end(ap);
leave_cancellation_point();
return ERROR;
}
/* Let file_vfcntl() do the real work */
ret = file_vfcntl(filep, cmd, ap);
} else
#endif
{
/* No... check for operations on a socket descriptor */
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
if ((unsigned int)fd < (CONFIG_NFILE_DESCRIPTORS + CONFIG_NSOCKET_DESCRIPTORS)) {
/* Yes.. defer socket descriptor operations to net_vfcntl() */
ret = net_vfcntl(fd, cmd, ap);
} else
#endif
{
/* No.. this descriptor number is out of range */
set_errno(EBADF);
ret = ERROR;
}
}
va_end(ap);
leave_cancellation_point();
return ret;
}
int fcntl(int fildes, int cmd, ...)
{
va_list ap;
int ret;
/* Setup to access the variable argument list */
va_start(ap, cmd);
/* Did we get a valid file descriptor? */
#if CONFIG_NFILE_DESCRIPTORS > 0
if ((unsigned int)fildes < CONFIG_NFILE_DESCRIPTORS)
{
/* Yes.. defer file operations to file_vfcntl() */
ret = file_vfcntl(fildes, cmd, ap);
}
else
#endif
{
/* No... check for operations on a socket descriptor */
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
if ((unsigned int)fildes < (CONFIG_NFILE_DESCRIPTORS+CONFIG_NSOCKET_DESCRIPTORS))
{
/* Yes.. defer socket descriptor operations to net_vfcntl() */
ret = net_vfcntl(fildes, cmd, ap);
}
else
#endif
{
/* No.. this descriptor number is out of range */
ret = EBADF;
}
}
va_end(ap);
return ret;
}
int fcntl(int fd, int cmd, ...)
{
FAR struct file *filep;
va_list ap;
int ret;
/* fcntl() is a cancellation point */
(void)enter_cancellation_point();
/* Setup to access the variable argument list */
va_start(ap, cmd);
/* Did we get a valid file descriptor? */
#if CONFIG_NFILE_DESCRIPTORS > 0
if ((unsigned int)fd < CONFIG_NFILE_DESCRIPTORS)
{
/* Get the file structure corresponding to the file descriptor. */
ret = fs_getfilep(fd, &filep);
if (ret >= 0)
{
DEBUGASSERT(filep != NULL);
/* Let file_vfcntl() do the real work. The errno is not set on
* failures.
*/
ret = file_vfcntl(filep, cmd, ap);
}
}
else
#endif
{
/* No... check for operations on a socket descriptor */
#if defined(CONFIG_NET) && CONFIG_NSOCKET_DESCRIPTORS > 0
if ((unsigned int)fd < (CONFIG_NFILE_DESCRIPTORS+CONFIG_NSOCKET_DESCRIPTORS))
{
/* Yes.. defer socket descriptor operations to net_vfcntl(). The
* errno is not set on failures.
*/
ret = net_vfcntl(fd, cmd, ap);
}
else
#endif
{
/* No.. this descriptor number is out of range */
ret = -EBADF;
}
}
va_end(ap);
if (ret < 0)
{
set_errno(-ret);
ret = ERROR;
}
leave_cancellation_point();
return ret;
}