c mkdirp

mkdirp.c

// assumes path of the form foo/bar/baz.png
// This function is not very generic
int mkdirp(const char *path) {
    char *buf = (char*)alloca(strlen(path));
    char *last = strrchr(path, '/');
    int res = 0;

    // Bail if there's no directories to make
    if (last == NULL) {
        return 0;
    }

    for (char *cur = strchr(path, '/'); cur != NULL; cur=strchr(cur + 1, '/')) {
        memset(buf, 0, strlen(path));
        size_t len = cur - path;
        strncpy(buf, path, len);
        buf[len] = '\0';
        if ((res = mkdir(buf, 0700)) == -1) {
            // Error
            return res;
        }
    }

    return 0;
}