即使设置了RSYNC_PROXY，rsync代理也不工作

Question

我背后的http代理和一个想要更新and端口使用sudo port selfupdate。但它总是失败，并显示以下输出：

$ sudo port -d selfupdate
DEBUG: Copying /Users/simon/Library/Preferences/com.apple.dt.Xcode.plist to /opt/local/var/macports/home/Library/Preferences
DEBUG: MacPorts sources location: /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
--->  Updating MacPorts base sources using rsync
rsync: getaddrinfo: rsync.macports.org 873: nodename nor servname provided, or not known
rsync error: error in socket IO (code 10) at /SourceCache/rsync/rsync-42/rsync/clientserver.c(105) [receiver=2.6.9]
Command failed: /usr/bin/rsync -rtzv --delete-after rsync://rsync.macports.org/release/tarballs/base.tar /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
Exit code: 10
DEBUG: Error synchronizing MacPorts sources: command execution failed
    while executing
"macports::selfupdate [array get global_options] base_updated"
Error: /opt/local/bin/port: port selfupdate failed: Error synchronizing MacPorts sources: command execution failed

显然，问题是rsync没有连接到服务器，所以我单独尝试了rsync，它给出了类似的结果。

$ sudo /usr/bin/rsync -rtzvvv --delete-after rsync://rsync.macports.org/release/tarballs/base.tar /opt/local/var/macports/sources/rsync.macports.org/release/tarballs
opening tcp connection to rsync.macports.org port 873
rsync: getaddrinfo: rsync.macports.org 873: nodename nor servname provided, or not known
rsync error: error in socket IO (code 10) at /SourceCache/rsync/rsync-42/rsync/clientserver.c(105) [receiver=2.6.9]
_exit_cleanup(code=10, file=/SourceCache/rsync/rsync-42/rsync/clientserver.c, line=105): about to call exit(10)

我确实设置了我的RSYNC_PROXY环境变量，并且代理正在工作，但根据rsync的输出，它似乎没有使用我给它的代理，而是尝试直接连接。有人能帮上忙吗？谢谢!

这里有更多的信息，以备不时之需。

$ echo $RSYNC_PROXY
127.0.0.1:3128
$ curl -x localhost:3128 http://rsync.macports.org:873/
@RSYNCD: 30.0
$ uname -a
Darwin Simon-MP.local 12.0.0 Darwin Kernel Version 12.0.0: Sun Jun 24 23:00:16 PDT 2012; root:xnu-2050.7.9~1/RELEASE_X86_64 x86_64

Answer 1

问题解决了。

事实证明，sudo确实将RSYNC_PROXY环境传递给了rsync。要保留环境，sudo接受-E选项：

保留-E (保留环境)选项将覆盖sudoers中的env_reset选项(5)。仅当匹配的命令具有SETENV标记或在sudoers(5)中设置了setenv选项时，该选项才可用。