how to pass in a pointer to a pointer

Code:

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// sock_create signature ...
int sock_create(int family, int type, int protocol, struct socket **res);

struct bam {
    union am *lay;
};

struct cam {
    struct socket *skt;
};

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How do I pass in the skt member of 'struct cam' to function sock_create() which has arg that requires a pointer to a pointer?

Code:

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        struct bam *bm;
        struct cam *cm;

        // ...

        cm = (struct cam *)bm->lay;
       
        // cm->skt wrong here, but not sure how to pass in.
        ret = sock_create(AF_INET, SOCK_STREAM, IPPROTO_TCP, cm->skt);

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Take the address of the pointer :)

Quote:

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Originally Posted by laserlight

Take the address of the pointer :)

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I understand that's what I need to do, but confused on the syntax ... &(cm->skt)

Yep, though you don't need the parentheses.