From e41ee7cf3347ced6e689c198dbf3c5900009d70f Mon Sep 17 00:00:00 2001
From: usa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Thu, 25 Feb 2016 10:58:02 +0000
Subject: [PATCH] merge revision(s) 53677: [Backport #11877]
* ext/socket/socket.c (sock_gethostname): support unlimited size
hostname.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@53936 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
ChangeLog | 5 +++++
ext/socket/socket.c | 26 ++++++++++++++++++++------
version.h | 2 +-
3 files changed, 26 insertions(+), 7 deletions(-)
diff --git a/ChangeLog b/ChangeLog
index f407b73..2216dd4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+Thu Feb 25 19:49:31 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
+
+ * ext/socket/socket.c (sock_gethostname): support unlimited size
+ hostname.
+
Sat Feb 13 17:11:58 2016 Fabian Wiesel <fabian.wiesel@sap.com>
* lib/uri/generic.rb (find_proxy): exclude white-spaces and allow
diff --git a/ext/socket/socket.c b/ext/socket/socket.c
index 0592432..13006ab 100644
--- a/ext/socket/socket.c
+++ b/ext/socket/socket.c
@@ -898,14 +898,28 @@ sock_gethostname(VALUE obj)
#ifndef HOST_NAME_MAX
# define HOST_NAME_MAX 1024
#endif
- char buf[HOST_NAME_MAX+1];
+ long len = HOST_NAME_MAX;
+ VALUE name;
rb_secure(3);
- if (gethostname(buf, (int)sizeof buf - 1) < 0)
- rb_sys_fail("gethostname");
-
- buf[sizeof buf - 1] = '\0';
- return rb_str_new2(buf);
+ name = rb_str_new(0, len);
+ while (gethostname(RSTRING_PTR(name), len) < 0) {
+ int e = errno;
+ switch (e) {
+ case ENAMETOOLONG:
+#ifdef __linux__
+ case EINVAL:
+ /* glibc before version 2.1 uses EINVAL instead of ENAMETOOLONG */
+#endif
+ break;
+ default:
+ rb_syserr_fail(e, "gethostname(3)");
+ }
+ rb_str_modify_expand(name, len);
+ len += len;
+ }
+ rb_str_resize(name, strlen(RSTRING_PTR(name)));
+ return name;
}
#else
#ifdef HAVE_UNAME