I want to create a function in UNIX C to display the content of a file

Question

I want to create a kind of agenda of championships and when a user logs in into my "database" he has to have access for visualising the championships details. These kind of details i keep in a file. How should my function look like ? I think I should try to use something like define myFile="Desktop/Program/Visualize.txt" and somehow in a function i should have something like execlp("cat", "cat", myFile, 0); Is there necessary using pipes or sockets? Thank you so much and please forgive my mistakes.

Answer 1

There is no need to go through system calls. Instead, use this function:

void display_file(const char *fn) {
    FILE *f = fopen(fn, "r");
    char c;
    while (1) {
        c = fgetc(f);
        if (c == -1)
            return;
        putchar(c);
    }
}