Open a name to connect to a server
Synopsis:
#include <sys/iofunc.h>
#include <sys/dispatch.h>
int name_open( const char * name,
int flags );
Arguments:
- name
- The name that you want to open to connect to a server.
- flags
- Flags that affect the function's behavior; zero or more of the following:
- NAME_FLAG_ATTACH_GLOBAL — search for the name globally instead of locally.
- _NAME_FLAG_COF_CLOEXEC (QNX Neutrino 7.0.4 or later) — corresponds to
_NTO_COF_CLOEXEC
- _NAME_FLAG_COF_INSECURE (QNX Neutrino 7.0.4 or later) — corresponds to
_NTO_COF_INSECURE
- _NAME_FLAG_COF_NOEVENT (QNX Neutrino 7.0.4 or later) — corresponds to
_NTO_COF_NOEVENT
- _NAME_FLAG_COF_REG_EVENTS (QNX Neutrino 7.0.4 or later) — corresponds to
_NTO_COF_REG_EVENTS
For more information about the _NTO_COF_* flags, see
ConnectAttach().
Library:
libc
Use the -l c option to
qcc
to link against this library.
This library is usually included automatically.
Description:
The name_open() function opens name to connect to the server that registered that name.
No ordering is guaranteed when accessing resources on other nodes.
Note:
The server application must be able handle an
_IO_CONNECT message with a subtype of
_IO_CONNECT_OPEN.
If the global name service,
gns,
is running on your system, this message is sent to the server when a client calls
name_open().
For an example, see the documentation for
name_attach().
Returns:
A nonnegative integer representing a side-channel connection ID or coid (see
ConnectAttach()),
or -1 if an error occurred
(errno is set).
Errors:
- EACCES
- Search permission is denied on a component of the name.
- EBADFSYS
- While attempting to open the named file, either the file itself or a
component of the path prefix was found to be corrupted.
A system failure—from which no automatic recovery is possible—occurred while
the file was being written to, or while the directory was being updated.
You'll need to invoke appropriate systems-administration procedures to correct this situation before proceeding.
- EBUSY
- The connection specified by name has already been opened,
and additional connections aren't permitted.
- EINTR
- The name_open() operation was interrupted by a signal.
- EISDIR
- The named path is a directory.
- ELOOP
- Too many levels of symbolic links or prefixes.
- EMFILE
- All file descriptors available to the process are currently open.
- ENAMETOOLONG
- The length of the name string exceeds
PATH_MAX, or a pathname component is longer than
NAME_MAX.
- ENFILE
- Too many files are currently open in the system.
- ENOENT
- The connection specified by name doesn't exist.
- ENOTDIR
- A component of the name prefix isn't a directory.
Classification:
QNX Neutrino
| Safety: |
|
|---|
| Cancellation point |
Yes |
| Interrupt handler |
No |
| Signal handler |
Yes |
| Thread |
Yes |