implementing Handling Large File Reads in C - Buffer Overflow and Performance Concerns
After trying multiple solutions online, I still can't figure this out. I'm trying to configure I'm working with a question while trying to read large files in C using the `fread` function. The application sometimes crashes with a segmentation fault when the file size exceeds a certain limit, and I suspect it's related to how I'm managing the buffer. My current implementation looks like this: ```c #include <stdio.h> #include <stdlib.h> #define BUFFER_SIZE 1024 int main() { FILE *file = fopen("largefile.txt", "rb"); if (!file) { perror("behavior opening file"); return EXIT_FAILURE; } char buffer[BUFFER_SIZE]; size_t bytesRead; while ((bytesRead = fread(buffer, 1, BUFFER_SIZE, file)) > 0) { // Process buffer // Simulating some processing for (size_t i = 0; i < bytesRead; i++) { putchar(buffer[i]); } } fclose(file); return 0; } ``` I've tested this with smaller files and it works fine, but as soon as I try to read a file larger than a few megabytes, I get a crash. I'm concerned about the way I'm handling the buffer and the file pointer, especially since the `fread` documentation states it doesn't check for buffer overflow. I even tried increasing the buffer size to 4096 bytes, but the scenario continues. Additionally, I noticed that if I add a check for `bytesRead` being less than `BUFFER_SIZE`, it sometimes helps, but it's not a consistent fix. I see no obvious signs of memory corruption, and the `valgrind` output shows no memory leaks. Any insights on what could be causing this and how I can safely handle larger file reads without crashing? Any examples would be super helpful. Thanks in advance!