tar: Can't translate pathname 中文檔名 to UTF-8 - BBS

FreeBSD 10.0-CURRENT

壓縮時, tar zcvPf 對於其中的中文檔名，會出現
Can't translate pathname 中文檔名 to UTF-8
解壓時, tar zxvPf 會出現
Pathname can't be converted from UTF-8 to current locale

已google，也man過，不知道問題在什麼地方。想請先賢指教，感謝

有試過
tar(c/x)指令前下 export LC_ALL=en_US.UTF-8
指令之後下 export LC_ALL=zh_TW.Big5
可以正常。但此方法頗鳥


目前設定
# set | grep LC_
LC_ADDRESS=zh_TW.Big5
LC_ALL=zh_TW.Big5
LC_COLLATE=zh_TW.Big5
LC_CTYPE=zh_TW.Big5
LC_IDENTIFICATION=zh_TW.Big5
LC_MEASUREMENT=zh_TW.Big5
LC_MESSAGES=zh_TW.Big5
LC_MONETARY=zh_TW.Big5
LC_NAME=zh_TW.Big5
LC_NUMERIC=zh_TW.Big5
LC_PAPER=zh_TW.Big5
LC_TELEPHONE=zh_TW.Big5
LC_TIME=zh_TW.Big5

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