I understand the working of write() call wherein it writes the data only to kernel's buffers which is later written to disk by kernel after sorting th ...
I understand the working of write() call wherein it writes the data only to kernel's buffers which is later written to disk by kernel after sorting th ...
I was reviewing some libraries in C for a systems programming class, and I noticed their implementation of a doubly linked list did not require dynami ...
In Linux, Message queues are a form of IPC. However, I don't understand how they are different from a file. Instead of writing into a message queues, ...
I am currently learning System Programming and came across the usage of int system(const char* command) in the chapter Process Management. They say th ...
Question Assume that you have two mutexes, guard_mtx_1 and guard_mtx_2, that guards the access to the global lists, list_1 and list_2 in two threads ...
I know paranoia meaning but I'm reading isc-dhcp source code and I got confused about this term in system programming and linux world. configure.ac f ...
I'm porting some software to FreeBSD 12 (it's never been run on FreeBSD). The software needs to track the system network interfaces and react immediat ...
Our application receives a large dataset(Ex 100 GB) from third party tool every night and we need to process it and feed it to our system by end of da ...
fcntl using code Hi. I'm trying to access a file with multiple threads, trying to get synchronization with record lock(fcntl). The problem is, fcntl ...
I have 2 semaphores. I have a shared memory segment. I am trying to synchronize processes so that they wait for each other until a certain task is fin ...
I am writing a simple cache simulation in c. I'm somewhat of a noob when it comes to c but I have the program almost entirely working I think. For som ...
I am wondering how this code can continue where it left off since If it receives an interrupt signal. In that case read() system call has to start a ...
I was wondering how to do this. I have tried several things but nothing seems to work for me. I don't want to use opendir() syscall nor do i want to u ...
int sigqueue(pid_t pid, int sig, const union sigval value); union sigval { int sival_int; void *sival_ptr; }; The parent decides to use memory ...
int main() { pid_t pid; printf("Parent: %d\n", getpid()); pid = fork(); if (pid == -1) { perror("fork"); goto clean_u ...
I was reading about system programming when I came across the semantic gap and how we have to bridge that for better software development. Then the t ...
Consider a sample below. The 4KB memory is allocated by calling malloc(). OS handles the memory request by the user program in user-space. First, O ...
Here is a example that maps a given file to memory using mmap function. In this example, I didn't use fwrite or write function to write something into ...
I have a hypervisor that virtualizes the currently running system ( OS in my case is Windows). I tried to run a code below and it works perfectly. The ...
actually I want to read/write in a .txt file. when I run g++ main.cpp new .txt file should get created and when I run ./a.out " fout<<"my data ...