#ls -al /dev/std*
crw-rw-rw-  1 root  wheel   22,   2 12 19 03:11 /dev/stderr
                                 ^^^
crw-rw-rw-  1 root  wheel   22,   0 12 12 11:01 /dev/stdin
crw-rw-rw-  1 root  wheel   22,   1 12 19 11:37 /dev/stdout
                                 ^^^
&2 and &1 跟這兩個東西有關嗎?

From:FreeBSD轉信版."錯過與等待" <..@.....>

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