Implementing Multiprocessing in C: fork and exec In operating systems, multiprocessing is an important mechanism that allows multiple processes to run simultaneously, thereby improving the efficiency and responsiveness of programs. In C language, <span>fork()</span> and <span>exec()</span> system calls are commonly used to create and manage new processes. This article will detail their working mechanisms and … Read more
Click on the aboveblue text to follow us In industrial production, firmware flashing is a critical step to ensure the normal operation of products. However, in practical applications, due to the asynchronous nature of file writing in the Linux system, it may lead to incomplete firmware flashing, thereby affecting the normal startup and operation of … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer đ Join our technical exchange QQ group with 1000 members, note ăpublic accountă for faster approval 1. Understanding Everything as a File Other files are understood as files by processes, which is easy to comprehend. However, external devices such as keyboards, monitors, and network … Read more
đ 1. Program Startup: From “Forking” to “Transforming” Forking After entering a command, the Shell instantlyforks a child process, where the parent and child share resources, but throughCopy-On-Write (COW) optimizationâonly when data is modified do they “split”, saving time and effort! Transforming (execve) The child process calls<span>execve</span> to replace its genes: the kernel parses the … Read more
This article introduces the MIPS architecture and its assembly language from four aspects: 1. Types of Registers 2. Arithmetic and Addressing Instructions 3. Program Structure 4. System Calls The tool required is: Mars 4.4 Download link: http://courses.missouristate.edu/KenVollmar/mars/download.htm 1 Data Types 1. All MIPS instructions are 32 bits long 2. 1 byte = 8 bits, half-word … Read more
Click the blue text above to follow us fcntl() and ioctl() are two system calls used to control file descriptors, each serving different purposes and functionalities in various situations. 1 fcntl() Function The fcntl() function provides the capability to perform various control operations on an open file descriptor, such as duplicating a file descriptor (similar … Read more
1 Introduction to Linux Library Functions Linux provides a rich set of library functions that cover various domains, from file operations to network programming, graphical interfaces, mathematical operations, and more. Most of these library functions are standard C library functions, along with some that are specific to the Linux system. Linux library functions are typically … Read more
Linux | Red Hat Certified | IT Technology | Operations Engineer đ Join our 1000-member tech exchange QQ group, note ăpublic accountă for faster approval 1. Classic Review of C File Interfaces When using C, we typically use functions like fopen, fwrite, fread, and fclose to access files. 1.2 fwrite For example, I need to … Read more
01 â Linux Architecture The Linux architecture can be divided into user space and kernel space, which interact with each other through the system call interface. The so-called System Call Interface is a mature interface predefined by the Linux kernel for user space applications. User applications can call the services provided by the operating system … Read more
1. Introduction In computer operating systems, disk I/O (Input/Output) is a key link in data read and write operations. For Linux systems, optimizing disk I/O performance is directly related to the overall response speed and data processing capability of the system. This article will detail the read and write process of Linux disk I/O, including … Read more