How can I handle file system errors in C?

How can I handle file system errors in C?

In C, you can handle file system errors using the errno variable and checking the return values of file operations.

What are some common file operations that can fail?

Common operations include opening files with fopen, reading with fread, and writing with fwrite. Each can fail for various reasons.

How do I check the value of errno?

You can check errno after a file operation fails. For example, if fopen returns NULL, you can print perror("Error opening file"); to see the error.

Can you give an example of error handling in a file read operation?

Sure! Here's a simple example:

FILE *file = fopen("example.txt", "r");
if (file == NULL) {
    perror("Error opening file");
    return 1;
}
// Read from file...