iofunc_devctl_default()

Default handler for _IO_DEVCTL messages

Synopsis:

#include <sys/iofunc.h>

int iofunc_devctl_default( resmgr_context_t *ctp,
                           io_devctl_t *msg,
                           iofunc_ocb_t *ocb );

Library:

libc

Description:

The iofunc_devctl_default() function implements POSIX semantics for the client's devctl() call, which is received as an _IO_DEVCTL message by the resource manager. This function can be placed directly into the io_funcs table passed to resmgr_attach(), at the devctl position.

The iofunc_devctl_default() function calls iofunc_devctl(), to do the actual work, and (if installed in the io_funcs table) issues the reply back to the client.

Returns:

EOK

Successful completion.

EINVAL

An attempt to set the flags for a resource that is synchronized, with no mount structure defined, or no synchronized I/O defined.

ENOTTY

An unsupported device control message was decoded.

_RESMGR_DEFAULT

An supported device control message that isn't a known DCMD_ALL_* command was decoded.

Classification:

QNX 6

See also:

iofunc_chmod_default(), iofunc_chown_default(), iofunc_close_dup_default(), iofunc_close_ocb_default(), iofunc_devctl(), iofunc_lock_default(), iofunc_lseek_default(), iofunc_mmap_default(), iofunc_open_default(), iofunc_pathconf_default(), iofunc_stat_default(), iofunc_time_update(), iofunc_unblock_default(), iofunc_utime_default(), resmgr_attach()