zIOC - Illumos

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#define S_IOCGETMODE (zIOC|01) /* return struct scc_mode */

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#define S_IOCSETMODE (zIOC|02) /* set SCC from struct scc_mode */

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#define S_IOCGETSTATS (zIOC|03) /* return sync data stats */

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#define S_IOCCLRSTATS (zIOC|04) /* clear sync stats */

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#define S_IOCGETSPEED (zIOC|05) /* return int baudrate */

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#define S_IOCGETMRU (zIOC|06) /* return int max receive unit */

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#define S_IOCSETMRU (zIOC|07) /* set max receive unit */

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#define S_IOCGETMTU (zIOC|010) /* return int max transmission unit */

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#define S_IOCSETMTU (zIOC|011) /* set max transmission unit */

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#define S_IOCGETMCTL (zIOC|012) /* return current CD/CTS state */

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#define S_IOCSETDTR (zIOC|013) /* Drive DTR signal */