Dynamically allocate user inputted string

Question

I am trying to write a function that does the following things:

• Start an input loop, printing \'> \' each iteration.
• Take whatever the

Answer 1

No error checking, don't forget to free the pointer when you're done with it. If you use this code to read enormous lines, you deserve all the pain it will bring you.

#include 
#include 

char *readInfiniteString() {
    int l = 256;
    char *buf = malloc(l);
    int p = 0;
    char ch;

    ch = getchar();
    while(ch != '\n') {
        buf[p++] = ch;
        if (p == l) {
            l += 256;
            buf = realloc(buf, l);
        }
        ch = getchar();
    }
    buf[p] = '\0';

    return buf;
}

int main(int argc, char *argv[]) {
    printf("> ");
    char *buf = readInfiniteString();
    printf("%s\n", buf);
    free(buf);
}