ipc_findkey(9) [centos man page]

IPC_FINDKEY(9)						       Kernel IPC facilities						    IPC_FINDKEY(9)

NAME

       ipc_findkey - find a key in an ipc identifier set

SYNOPSIS

       struct kern_ipc_perm * ipc_findkey(struct ipc_ids * ids, key_t key);

ARGUMENTS

       ids
	   Identifier set

       key
	   The key to find

	   Requires ipc_ids.rwsem locked. Returns the LOCKED pointer to the ipc structure if found or NULL if not. If key is found ipc points to
	   the owning ipc structure

COPYRIGHT

Kernel Hackers Manual 3.10					     June 2014							    IPC_FINDKEY(9)

ipc.h(3HEAD)							      Headers							      ipc.h(3HEAD)

NAME

       ipc.h, ipc - XSI interprocess communication access structure

SYNOPSIS

       #include <sys/ipc.h>

DESCRIPTION

       The <sys/ipc.h> header is used by three mechanisms for interprocess communication (IPC): messages, semaphores, and shared memory. All use a
       common structure type, ipc_perm, to pass information used in determining permission to perform an IPC operation.

       The ipc_perm structure contains the following members:

	 uid_t	uid	/* owner's user ID */
	 gid_t	gid	/* owner's group ID */
	 uid_t	cuid	/* creator's user ID */
	 gid_t	cgid	/* creator's group ID */
	 mode_t mode	/* read/write permission

       The uid_t, gid_t, mode_t, and key_t types are defined as described in <sys/types.h>. See types.h(3HEAD).

       Definitions are provided for the constants listed below.

       Mode bits:

       IPC_CREAT     Create entry if key does not exist.

       IPC_EXCL      Fail if key exists.

       IPC_NOWAIT    Error if request must wait.

       Keys:

       IPC_PRIVATE    Private key.

       Control commands:

       IPC_RMID    Remove identifier.

       IPC_SET	   Set options.

       IPC_STAT    Get options.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Standard			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       ftok(3C), types.h(3HEAD), attributes(5), standards(5)

SunOS 5.11							    10 Sep 2004 						      ipc.h(3HEAD)