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Cygwin: AF_LOCAL: allow opening with the O_PATH flag

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If that flag is not set, or if an attempt is made to open a different
type of socket, the errno is now EOPNOTSUPP instead of ENXIO.  This is
consistent with POSIX, starting with the 2016 edition.  Earlier
editions were silent on this issue.

Opening is done in a (new) fhandler_socket_local::open method by
calling fhandler_base::open_fs.

Also add a corresponding fhandler_socket_local::close method.
This commit is contained in:
Ken Brown 2020-01-23 14:39:15 -05:00
parent 3ed0086d15
commit b1b4639b12
2 changed files with 22 additions and 0 deletions
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2
winsup/cygwin/fhandler.h
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@ -834,6 +834,8 @@ class fhandler_socket_local: public fhandler_socket_wsock
int getsockopt (int level, int optname, const void *optval,
__socklen_t *optlen);
int open (int flags, mode_t mode = 0);
int close ();
int __reg2 fstat (struct stat *buf);
int __reg2 fstatvfs (struct statvfs *buf);
int __reg1 fchmod (mode_t newmode);

20
winsup/cygwin/fhandler_socket_local.cc
View File

@ -634,6 +634,26 @@ fhandler_socket_local::dup (fhandler_base *child, int flags)
return fhandler_socket_wsock::dup (child, flags);
}
int
fhandler_socket_local::open (int flags, mode_t mode)
{
/* We don't support opening sockets unless O_PATH is specified. */
if (flags & O_PATH)
return open_fs (flags, mode);
set_errno (EOPNOTSUPP);
return 0;
}
int
fhandler_socket_local::close ()
{
if (get_flags () & O_PATH)
return fhandler_base::close ();
else
return fhandler_socket_wsock::close ();
}
int __reg2
fhandler_socket_local::fstat (struct stat *buf)
{