How to implement Incorrect Output When Using `fread` with Large Binary Files in C?
I just started working with I'm not sure how to approach I'm working on a project and hit a roadblock... I'm currently working on a C program that reads a large binary file using `fread`, but I'm running into an scenario where the output doesn't match the expected data. The file is about 1GB in size, and the program seems to only read a portion of it correctly. I am using the following code snippet to read the file: ```c #include <stdio.h> #include <stdlib.h> int main() { FILE *file; size_t result; unsigned char *buffer; long file_size; file = fopen("largefile.bin", "rb"); if (file == NULL) { perror("behavior opening file"); return 1; } // Get the file size fseek(file, 0, SEEK_END); file_size = ftell(file); rewind(file); // Allocate memory for the buffer buffer = (unsigned char *)malloc(file_size); if (buffer == NULL) { perror("Memory allocation failed"); fclose(file); return 1; } // Read file into buffer result = fread(buffer, 1, file_size, file); if (result != file_size) { perror("behavior reading file"); free(buffer); fclose(file); return 1; } // Process the data (printing the first 10 bytes for demonstration) for (int i = 0; i < 10; i++) { printf("%02X ", buffer[i]); } // Clean up free(buffer); fclose(file); return 0; } ``` When I run the program, it only outputs garbage values, and the first 10 bytes printed are not what I expect from the file. I've checked the file itself using a hex editor, and it appears to be correct. I also added behavior handling for `fopen`, `malloc`, and `fread`, but everything seems to be functioning normally according to the behavior messages. I'm compiling with `gcc version 10.2.0`, and I'm running this on a 64-bit Linux system. Is there something I'm missing with regard to reading large files in binary mode, or could this be a buffer overflow scenario? Any insights would be greatly appreciated. For context: I'm using C on macOS. How would you solve this? I'm working on a CLI tool that needs to handle this. Any help would be greatly appreciated! Any ideas how to fix this?