use rb_gc_for_fd for more callers

* dir.c (dir_initialize): use rb_gc_for_fd for ENOMEM
* ext/socket/init.c (rsock_socket): ditto
* ext/socket/socket.c (rsock_socketpair): ditto
* internal.h (rb_gc_for_fd): prototype
* io.c (rb_gc_for_fd): remove static
  [ruby-core:71623] [Feature #11727]

Manpages for opendir(2), socket(2), and socketpair(3posix)
describe ENOMEM as a possible error for each of these;
handle it consistently with our existing wrappers for
open(2)/pipe(2) etc...

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52726 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/io.c b/io.c
index e5a7b6a260..8ebc80b218 100644
--- a/io.c
+++ b/io.c
@@ -884,7 +884,7 @@ rb_io_read_check(rb_io_t *fptr)
     return;
 }
 
-static int
+int
 rb_gc_for_fd(int err)
 {
     if (err == EMFILE || err == ENFILE || err == ENOMEM) {