1SOCKFD_LOOKUP(9)               Linux Networking               SOCKFD_LOOKUP(9)
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NAME

6       sockfd_lookup - Go from a file number to its socket slot
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SYNOPSIS

9       struct socket * sockfd_lookup(int fd, int * err);
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ARGUMENTS

12       fd
13           file handle
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15       err
16           pointer to an error code return
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DESCRIPTION

19       The file handle passed in is locked and the socket it is bound too is
20       returned. If an error occurs the err pointer is overwritten with a
21       negative errno code and NULL is returned. The function checks for both
22       invalid handles and passing a handle which is not a socket.
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24       On a success the socket object pointer is returned.
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27Kernel Hackers Manual 2.6.         June 2019                  SOCKFD_LOOKUP(9)
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