ipc (2)

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ipc - System V IPC system calls


int ipc(unsigned int call, int first, int secondint " third ,
        void *ptr, long fifth);


ipc() is a common kernel entry point for the System V IPC calls for messages, semaphores, and shared memory. call determines which IPC function to invoke; the other arguments are passed through to the appropriate call.

User-space programs should call the appropriate functions by their usual names. Only standard library implementors and kernel hackers need to know about ipc().

Conforming to

ipc() is Linux-specific, and should not be used in programs intended to be portable.


On some architectures--for example x86-64 and ARM--there is no ipc() system call; instead, msgctl(2) , semctl(2) , shmctl(2) , and so on really are implemented as separate system calls.

See Also

msgctl(2) , msgget(2) , msgrcv(2) , msgsnd(2) , semctl(2) , semget(2) , semop(2) , semtimedop(2) , shmat(2) , shmctl(2) , shmdt(2) , shmget(2) , sysvipc(7)


This page is part of release 5.09 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

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