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ipc.h
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ #ifndef _LINUX_IPC_H #define _LINUX_IPC_H #include <linux/types.h> #define IPC_PRIVATE ((__kernel_key_t) 0) /* Obsolete, used only for backwards compatibility and libc5 compiles */ struct ipc_perm { __kernel_key_t key; __kernel_uid_t uid; __kernel_gid_t gid; __kernel_uid_t cuid; __kernel_gid_t cgid; __kernel_mode_t mode; unsigned short seq; }; /* Include the definition of ipc64_perm */ #include <asm/ipcbuf.h> /* resource get request flags */ #define IPC_CREAT 00001000 /* create if key is nonexistent */ #define IPC_EXCL 00002000 /* fail if key exists */ #define IPC_NOWAIT 00004000 /* return error on wait */ /* these fields are used by the DIPC package so the kernel as standard should avoid using them if possible */ #define IPC_DIPC 00010000 /* make it distributed */ #define IPC_OWN 00020000 /* this machine is the DIPC owner */ /* * Control commands used with semctl, msgctl and shmctl * see also specific commands in sem.h, msg.h and shm.h */ #define IPC_RMID 0 /* remove resource */ #define IPC_SET 1 /* set ipc_perm options */ #define IPC_STAT 2 /* get ipc_perm options */ #define IPC_INFO 3 /* see ipcs */ /* * Version flags for semctl, msgctl, and shmctl commands * These are passed as bitflags or-ed with the actual command */ #define IPC_OLD 0 /* Old version (no 32-bit UID support on many architectures) */ #define IPC_64 0x0100 /* New version (support 32-bit UIDs, bigger message sizes, etc. */ /* * These are used to wrap system calls. * * See architecture code for ugly details.. */ struct ipc_kludge { struct msgbuf *msgp; long msgtyp; }; #define SEMOP 1 #define SEMGET 2 #define SEMCTL 3 #define SEMTIMEDOP 4 #define MSGSND 11 #define MSGRCV 12 #define MSGGET 13 #define MSGCTL 14 #define SHMAT 21 #define SHMDT 22 #define SHMGET 23 #define SHMCTL 24 /* Used by the DIPC package, try and avoid reusing it */ #define DIPC 25 #define IPCCALL(version,op) ((version)<<16 | (op)) #endif /* _LINUX_IPC_H */