bindresvport(3)                                         bindresvport(3)

  bindresvport()

  NAME

    bindresvport() - bind a socket to a privileged IP port

  SYNOPSIS

    #include 
    #include 

    int bindresvport(int sd, struct socaddr_in *sin)

  DESCRIPTION

    bindresvport(3) is used to bind a socket descriptor to a privileged IP
    port, that is, a port number in the range 0-1023. The routine returns 0 if
    it is successful, otherwise -1 is returned and errno set to reflect the
    cause of the error.

    Only a privileged user can bind to a privileged port; this call will fail
    for any other users.

  USAGE NOTES

    The bindresvport function is not thread safe.

    The bindresvport function is not async-signal safe.