Disk scheduling algorithms are used to come with an order in which the I/O read/write requests by the different process should be satisfied. The aim is to minimize the seek time i.e., the time to move from one sector to another. First Come First Serve (FCFS) disk scheduling algorithm serves the incoming requests in order …
Before implementing SSTF Algorithm Program in C, let us understand the working of SSTF algorithm. SSTF selects the request with the least seek time from the current head position. SSTF chooses the pending request closest to the current head position. e.g. for the same question (as in FCFS), the order of request serviced using SSTF …
Program for IPC using Message queues are almost similar to named pipes with the exception that they do not require the opening and closing of pipes. But, they face one similar problem like named pipes; blocking on full pipes. Message queues send blocks of data from one process to another. Each block of data is …
In this post we are going to understand the C program implementing the solution to the Dining Philosopher Problem. The Dining Philosopher Problem states that there are five philosophers which do two thinks: think and eat. They share a table having a chair for each one of them. In the center of the table there …
In this post we are going to solve a common question that dazzles most programmers – How to get OS version in C? When building an application sometimes a requirement is to check the operating system version. Programmers find it difficult to achieve this in C language. The solution to the above question is using …
When a process creates a child process, sometimes it becomes necessary that the parent process should execute only after the child has finished. wait() system call does exactly this. It makes the parent process wait for child process to finish and then the parent continues its working from the statement after the wait().To be exact …
dup() system call is used to duplicate a file descriptor. It creates a copy of the old file descriptor to a new file descriptor.
lseek() system call repositions the read/write file offset i.e., it changes the positions of the read/write pointer within the file. In every file any
The open() system call is used to get the file descriptor of any file. To understand the working of open() system call lets
program using shmget() function