👉 The `ior` command, often used in the context of Linux and Unix-like operating systems, is part of the `ioctl` family of system calls. It stands for "input/output request." This command allows a process to request specific actions from the operating system's kernel, such as controlling I/O devices, managing file operations, or requesting data from a network interface. Unlike higher-level system calls like `open`, `read`, or `write`, which perform specific tasks directly, `ior` provides a more generic interface for interacting with device-specific functions. It typically takes two arguments: a file descriptor (or a pointer to a buffer) and an integer value that specifies the operation to be performed. For example, `ioctl(fd, IOCTL_READ, buf)` reads data from a file descriptor `fd` into a buffer `buf` using the specified I/O operation. This makes `ior` a versatile tool for low-level device management and custom I/O operations.
