cross-platform home dir in pure C

homedir.c

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

#define PATH_LEN 256

int main(void)
{
    char path[PATH_LEN];
    FILE *pipe;
    if(!(pipe = popen("scala -e 'print(sys.props(\"user.home\"))'", "r")))
    {
        fprintf(stderr, "Error\n");
        exit(1);
    }
    memset(path, 0, PATH_LEN);
    fgets(path, PATH_LEN-1, pipe);
    printf("User directory: %s\n", path);
    pclose(pipe);
    return 0;
}