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