43 lines
1.1 KiB
C
43 lines
1.1 KiB
C
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#ifndef _SYS_IPC_H
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#define _SYS_IPC_H
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/* For gid_t, uid_t */
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#include <sys/types.h>
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/* Mode bits for `msgget', `semget', and `shmget'. */
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/* Create key if key does not exist. */
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#define IPC_CREAT 01000
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/* Fail if key exists. */
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#define IPC_EXCL 02000
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/* Return error on wait. */
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#define IPC_NOWAIT 04000
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/* Control commands for `msgctl', `semctl', and `shmctl'. */
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/* Remove identifier. */
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#define IPC_RMID 0
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/* Set `ipc_perm' options. */
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#define IPC_SET 1
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/* Get `ipc_perm' options. */
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#define IPC_STAT 2
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#define IPC_INFO 3 /* See ipcs. */
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/* Special key values. */
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/* Private key. */
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#define IPC_PRIVATE ((key_t) 0)
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/* Data structure used to pass permission information to IPC operations. */
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struct ipc_perm
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{
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key_t key; /* Key. */
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uid_t uid; /* Owner's user ID. */
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gid_t gid; /* Owner's group ID. */
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uid_t cuid; /* Creator's user ID. */
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gid_t cgid; /* Creator's group ID. */
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unsigned short int mode; /* Reader/write permission. */
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unsigned short int __seq; /* Sequence number. */
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};
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_PROTOTYPE( key_t ftok, (const char *__path, int __id));
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#endif /* _SYS_IPC_H */
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