Formatting a text file in C

justtext.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

FILE* getTextFromFile(char filename[]) {
    FILE* ptr;
    ptr = fopen("data.csv", "r");
    if (NULL == ptr) {
        printf("file can't be opened \n");
    }
    return ptr;
}

const char* getLine(FILE* file) {
    // TODO: this is broken
    char myMemory[256];
    char * line;
    char ch;
    int index = 0;
    do {
        ch = fgetc(file);
        if (ch == '\n') {
            break;
        } else {
            // Sementation fault error
            line[index] = ch;
        }
        index++;
    } while (ch != EOF);
    //printf("%d\n", index);
    line[index] = '\0';
    return line;
}
 
int main()
{
    // 1. Get the text from the file
    FILE* file = getTextFromFile("data.csv");

    // 2. Get one line of text
    const char* line = getLine(file);
    printf("%s", line);
 
    fclose(file);
    return 0;
}