goto

void func() {
        int sock;
        FILE *file1, *file2;
        char *buf;

        sock = socket();
        if (!sock)
                goto out;

        file1 = fopen();
        if (!file1)
                goto out_sock;

        file2 = fopen();
        if (!file2)
                goto out_file1;

        buf = malloc();
        if (!buf)
                goto out_file2;

        /* do things */

out_alloc:
        free(buf);
out_file2:
        fclose(file2);
out_file1:
        fclose(file1);
out_sock:
        close(sock);
out:
        return;
}