diff options
Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/lib/libsocket.tex | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/Doc/lib/libsocket.tex b/Doc/lib/libsocket.tex index 04d467aa0c..c7b656d0ed 100644 --- a/Doc/lib/libsocket.tex +++ b/Doc/lib/libsocket.tex @@ -317,10 +317,11 @@ Availability: \UNIX. \versionadded{2.4} \end{funcdesc} \begin{funcdesc}{fromfd}{fd, family, type\optional{, proto}} -Build a socket object from an existing file descriptor (an integer as -returned by a file object's \method{fileno()} method). Address family, -socket type and protocol number are as for the \function{socket()} function -above. The file descriptor should refer to a socket, but this is not +Duplicate the file descriptor \var{fd} (an integer as returned by a file +object's \method{fileno()} method) and build a socket object from the +result. Address family, socket type and protocol number are as for the +\function{socket()} function above. +The file descriptor should refer to a socket, but this is not checked --- subsequent operations on the object may fail if the file descriptor is invalid. This function is rarely needed, but can be used to get or set socket options on a socket passed to a program as |