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DTR 20 connects to 6 DSR
DSR 6 connects to 20 DTR
SG 7 connects to 7 SG
DCD 8 connects to 4 RTS
RTS 4   5 CTS
CTS 5 connects to 8 DCD

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18.3.3.2 getty ¥¿¥¤¥×¤Î»ØÄê

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ttyd1   "/usr/libexec/getty std.38400"   wy50  on insecure # Kitchen
ttyd5   "/usr/libexec/getty std.19200"   vt100 on insecure # Guest bathroom

18.3.3.6 init ¤Ë¥Õ¥¡¥¤¥ë /etc/ttys ¤ÎºÆÆÉ¤ß ¹þ¤ß¤ò¤µ¤»¤ë

FreeBSD ¤ò¥Ö¡¼¥È¤¹¤ë¤È¡¢ºÇ½é¤Ëµ¯Æ°¤µ¤ì¤ë¥×¥í¥»¥¹¡¢ init¤¬ /etc/ttys ¤òÆÉ¤ß¹þ¤ó¤Ç¡¢µ­½Ò¤µ¤ì¤Æ¤¤¤ë¥×¥í¥°¥é¥à¤òÍøÍѲÄǽ¤Ê ¥Ý¡¼¥È¤ËÂФ·¤Æ¼Â¹Ô¤·¡¢ ¥í¥°¥¤¥ó¥×¥í¥ó¥×¥È¤òÁ÷¤ê½Ð¤µ¤»¤Þ¤¹¡£

/etc/ttys ¤ÎÊÔ½¸¤¬½ª¤ï¤Ã¤¿¸å¡¢ init ¤ËÊѹ¹¤òǧ¼±¤µ¤»¤ë¤¿ ¤á¤Ë¡¢¤ï¤¶¤ï¤¶ FreeBSD ¤ò¥Ö¡¼¥È¤·¤Ê¤ª¤·¤¿¤¯¤Ï¤Ê¤¤¤Ç¤·¤ç¤¦¡£¤³¤Î¤è¤¦¤Ê ¾ì¹ç¤Î¤¿¤á¤Ë¡¢init ¤Ï¡¢ SIGHUP (hangup) ¥·¥°¥Ê¥ë¤ò¼õ¿®¤¹¤ë¤È¡¢ /etc/ttys ¤òÆÉ¤ß¹þ¤ß¤Ê¤ª¤¹¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡£

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# kill -HUP 1

(init ¥×¥í¥»¥¹¤Î¥×¥í¥»¥¹ ID ¤Ï ¾ï¤Ë 1¤Ç¤¹)

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18.3.4 ¥È¥é¥Ö¥ë¥·¥å¡¼¥Æ¥£¥ó¥°

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getty ¤¬Æ°¤¤¤Æ¤¤¤Æ¡¢ üËö¤òǧ¼±¤·¤Æ¤¤¤ë¤³¤È¤ò³Îǧ¤·¤Æ¤¯¤À¤µ¤¤¡£°Ê ²¼¤Î¥³¥Þ¥ó¥É¤ÇưºîÃæ¤Î getty ¥×¥í¥»¥¹¤Î¥ê¥¹¥È¤òÆÀ¤ë¤³¤È¤¬¤Ç¤­¤Þ¤¹¡£

# ps -axww|grep getty

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22189  d1  Is+    0:00.03 /usr/libexec/getty std.38400 ttyd1

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