shmctlshmid
Shmctlshmid is a system call used in Unix-like operating systems to control shared memory segments. It is part of the System V IPC (Inter-Process Communication) mechanism, which allows processes to share data through memory segments. The shmctl function is used to perform various operations on a shared memory segment identified by its ID (shmid).
The shmctl function takes three arguments: the shared memory segment ID, the command to be executed, and
- IPC_STAT: Retrieves the status of the shared memory segment and stores it in the buffer pointed
- IPC_SET: Sets the owner, group, and permissions of the shared memory segment based on the values
- IPC_RMID: Removes the shared memory segment from the system.
The shmctl function returns 0 on success and -1 on failure, with the error code stored in
Shmctlshmid is commonly used in applications that require inter-process communication, such as databases, web servers, and