[newlib-cygwin/cygwin-3_0-branch] Minor improvements to socket error handling:

[Corinna Vinschen <corinna@sourceware.org>]

https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=debad46cfe801e319151a085beaed595cc022b4c

commit debad46cfe801e319151a085beaed595cc022b4c
Author: Erik M. Bray <erik.m.bray@gmail.com>
Date:   Tue Apr 23 16:55:33 2019 +0200

    Minor improvements to socket error handling:
    
    * Change default fallback for failed winsock error -> POSIX error
      mappings to EACCES, which is a valid errno for more socket-related
      syscalls.
    
    * Added a few previously missing entries to the wsock_errmap table
      that have obvious POSIX errno.h analogues.
    
    (cherry picked from commit 489e7e20480ff34a519d7299b226c56fa99f14a8)

Diff:
---
 winsup/cygwin/net.cc | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/winsup/cygwin/net.cc b/winsup/cygwin/net.cc
index cd296d1..437712c 100644
--- a/winsup/cygwin/net.cc
+++ b/winsup/cygwin/net.cc
@@ -177,6 +177,9 @@ static const errmap_t wsock_errmap[] = {
   {WSAEREMOTE, "WSAEREMOTE", EREMOTE},
   {WSAEINVAL, "WSAEINVAL", EINVAL},
   {WSAEFAULT, "WSAEFAULT", EFAULT},
+  {WSAEBADF, "WSAEBADF", EBADF},
+  {WSAEACCES, "WSAEACCES", EACCES},
+  {WSAEMFILE, "WSAEMFILE", EMFILE},
   {0, "NOERROR", 0},
   {0, NULL, 0}
 };
@@ -188,7 +191,7 @@ find_winsock_errno (DWORD why)
     if (why == wsock_errmap[i].w)
       return wsock_errmap[i].e;
 
-  return EPERM;
+  return EACCES;
 }
 
 void