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3 — ¤½¤ì¤ò‘/dev/tty’¤È¤·¤Æ³«¤¯¥·¥¹¥Æ¥à¤â¤¢¤ê¤Þ¤¹¡¥
4 — Kubota Titan¤Ç»ÈÍѤµ¤ì¤Æ¤¤¤Þ¤¹¡¥

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ULTRIX V4.4 (Rev. 69) System #31: Thu Aug 10 19:42:23 GMT 1995
UWS V4.4 (Rev. 11)
$ eval 'echo matter >fullness' >void
illegal io
$ eval '(echo matter >fullness)' >void
illegal io
$ (eval '(echo matter >fullness)') >void
Ambiguous output redirect.

¤½¤ì¤¾¤ì¤Î¾ì¹ç¤Ç¡¤´üÂÔ¤µ¤ì¤ë·ë²Ì¤Ï¤â¤Á¤í¤ó¡¤‘matter’¤ò´Þ¤ó¤Ç¤¤¤ë fullness¤È¡¤¶õ¤Îvoid¤Ç¤¹¡¥

¥³¥Þ¥ó¥É¤ÎÂåÆþ¤Î¥ê¥À¥¤¥ì¥¯¥È¤òɸ½à¥¨¥é¡¼½ÐÎϤˤ·¤Ê¤¤¤Ç¤¯¤À¤µ¤¤¡¥¤½¤ì¤Ï¡¤ ¥³¥Þ¥ó¥É¤ÎÂåÆþ¤ÎÆâÉô¤Ç¹Ô¤Ê¤¦É¬Íפ¬¤¢¤ê¤Þ¤¹¡¥¥¨¥é¡¼¥á¥Ã¥»¡¼¥¸¤òºï ½ü¤¹¤ë¤³¤È¤ò´üÂÔ¤·¤Æ‘: `cd /zorglub` 2>/dev/null’¤ò¼Â¹Ô¤·¤Æ¤¤¤ë¤È¤­¡¤ ‘: `cd /zorglub 2>/dev/null`’¤ÏÀµ¤·¤¯Æ°ºî¤·¤Þ¤¹¡¥

(Ash¤Ç¤âBash¤Ç¤â¤Ê¤¤)Zsh¤¬³äÅö¤ò²Äǽ¤Ë¤¹¤ë¤³¤È¤ËÃí°Õ¤¹¤ë²ÁÃͤϤ¢¤ê¤Þ¤¹¡¥ ‘foo=`cd /zorglub` 2>/dev/null’¡¥

¤Û¤È¤ó¤É¤Î¥·¥§¥ë¤Ç¤Ï¡¤(Bash¡¤Zsh¡¤Ash¤ò´Þ¤á)Á´¤Æ¤Ç¤Ï¤¢¤ê¤Þ¤»¤ó¤¬¡¤É¸½à¥¨ ¥é¡¼½ÐÎϤò¡¤¥µ¥Ö¥·¥§¥ë¤ËÂФ·¤Æ¤âÄÉÀפ·¤Æ¤¤¤Þ¤¹¡¥ÆâÉô¥³¥Þ¥ó¥É¤Îɸ½à¥¨¥é¡¼ ½ÐÎϤòÆÀ¤ëÌÜŪ¤¬¤¢¤ë¾ì¹ç¡¤¤³¤ì¤Ç¤Ï·ë²Ì¤¬Ë¾¤Þ¤Ê¤¤ÆâÍÆ¤Ë¤Ê¤ë¤«¤â¤·¤ì¤Þ¤»¤ó¡¥

$ ash -x -c '(eval "echo foo >&2") 2>stderr'
$ cat stderr
+ eval echo foo >&2
+ echo foo
foo
$ bash -x -c '(eval "echo foo >&2") 2>stderr'
$ cat stderr
+ eval 'echo foo >&2'
++ echo foo
foo
$ zsh -x -c '(eval "echo foo >&2") 2>stderr'
# Traces on startup files deleted here.
$ cat stderr
+zsh:1> eval echo foo >&2
+zsh:1> echo foo
foo

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exec >foo; mv foo bar’¤Î¤è¤¦¤Ë¡¤³«¤¤¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¤Î°Üư/ºï½ü¤Î»î ¤ß¤Ï¤·¤Ê¤¤¤è¤¦¤Ë¤·¤Æ¤¯¤À¤µ¤¤¡¥mv¤Î¾ÜºÙ¤Ï¡¤Limitations of Builtins¤ò»²¾È¤·¤Æ¤¯¤À¤µ¤¤¡¥