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Name: File I/O in Linux
Uploaded: 2020-05-16T16:50:19+05:30
Channel: Karunesh Johri
Description: Buffered I/O and synchronized I/O and the input output system calls, open, creat, read, write, lseek, close and unlink are explained.

File I/O in Linux

By Karunesh Johri • Updated: May 22, 2023

1.0 Input and Output (I/O) All programs need to interact with the external world which makes I/O important. Programs store data in files which provide large persistent storage. In this post we will look at the system calls and functions for file I/O and the issues that govern the program and I/O device interaction. 2.0 …

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Tags: buffered io, close, creat, fdatasync, file, fsync, ftruncate, input and output, lseek, open, read, sync, syncfs, synchronized io, truncate, unlink, write

POSIX Shared Memory in Linux

By Karunesh Johri • Updated: May 26, 2023

1.0 Shared Memory Shared memory is an inter process communication (IPC) mechanism in Linux and other UNIX-like systems. Based on input parameters, the kernel provides a (shared) memory segment to the calling process. The calling process maps the shared memory segment to its address space. This way, the same shared memory segment can be mapped …

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Tags: communication, example, ftruncate, interprocess communication, ipc, Linux, mmap, munmap, posix, program, semaphore, shared memory, shm_open, shm_unlink, Unix