getpatch

void _getenv(const char *name)
{
    int count = 0, cmp = 0, size = 0;
    char *copy;
    const char del[] = "=";
    char *token;

    copy = strdup(name);
    size = strlen(name);
    size++;

    while (environ[count])
    {
        /* get the first token */
        token = strtok(environ[count], del);
        /* walk through other tokens */
        while (token != NULL)
        {
            cmp = strcmp(token, copy);
            if (cmp == 0)
            {
                if (token)
                {
                    token = strtok(token + size, ":");
                    while (token != NULL)
                    {
                        printf("%s\n", token);
                        token = strtok(NULL, ":");
                    }
                }
            }
            token = strtok(NULL, del);
        }
        count++;
    }
}

int main(void)
{
    const char *name = "PATH";

    _getenv(name);
    return (0);
}