[PATCH 5/5] manual: Document error codes missing for 'inet_pton'

[Maciej W. Rozycki]

From: Maciej W. Rozycki <macro@redhat.com>

Add documentation for EAFNOSUPPORT error code returned, and the possible 
return values on failure.
---
 manual/socket.texi |   11 +++++++++++
 1 file changed, 11 insertions(+)

glibc-doc-inet_pton-err.diff
Index: glibc/manual/socket.texi
===================================================================
--- glibc.orig/manual/socket.texi
+++ glibc/manual/socket.texi
@@ -1222,6 +1222,17 @@ either @code{AF_INET} or @code{AF_INET6}
 address being converted.  @var{cp} is a pointer to the input string, and
 @var{buf} is a pointer to a buffer for the result.  It is the caller's
 responsibility to make sure the buffer is large enough.
+
+The return value is @code{1} on success.  On failure, the function's
+return value is zero if @var{cp} does not point to a valid address string
+for the address family @var{af} requested, or otherwise the function's
+return value is @code{-1} and @code{errno} is set accordingly.  The
+following @code{errno} values are specific to this function:
+
+@table @code
+@item EAFNOSUPPORT
+The address family requested is neither @code{AF_INET} nor @code{AF_INET6}.
+@end table
 @end deftypefun
 
 @deftypefun {const char *} inet_ntop (int @var{af}, const void *@var{cp}, char *@var{buf}, socklen_t @var{len})