Hello, for a personal project I was interrested in using the wait for interrupt capability of serial ports. After searching for documentation I found very few data about the tty ioctl commands: TIOCMIWAIT and TIOCGICOUNT. Moreover this was not documented in man4/tty_ioctl.4 file. So here is a possible patch to add quick information on TIOCMIWAIT and TIOCGICOUNT commands. This patch is against version 3.17 of the man pages. Please do not hesitate to correct english terms as this is not my birth tongue. Best regards Fred --- /home/fred/man-pages-3.17/man4/tty_ioctl.4 2009-01-19 05:14:02.000000000 +0100 +++ /home/fred/man-pages-3.17-new/man4/tty_ioctl.4 2009-02-09 10:20:43.363377700 +0100 @@ -349,18 +349,26 @@ .SS "Modem control" .TP .BI "TIOCMGET int *" argp -get the status of modem bits. +Get the status of modem bits. .TP .BI "TIOCMSET const int *" argp -set the status of modem bits. +Set the status of modem bits. .TP .BI "TIOCMBIC const int *" argp -clear the indicated modem bits. +Clear the indicated modem bits. .TP .BI "TIOCMBIS const int *" argp -set the indicated modem bits. +Set the indicated modem bits. +.TP +.BI "TIOCMIWAIT int " arg +Wait for any of the 4 modem bits (DCD, RI, DSR, CTS) to change. +The mask is passed in arg for bits of interest (use |'ed +TIOCM_RNG/DSR/CD/CTS for masking). +Caller should use +.B TIOCGICOUNT +to see which one it was. .LP -Bits used by these four ioctls: +Bits used by these five ioctls: .nf TIOCM_LE DSR (data set ready/line enable) @@ -375,6 +383,15 @@ TIOCM_RI see TIOCM_RNG TIOCM_DSR DSR (data set ready) .fi +.TP +.BI "TIOCGICOUNT struct serial_icounter_struct *" argp +Get counter of input serial line interrupts (DCD, RI, DSR, CTS). +Write counters to the user passed +.I argp +serial_icounter_struct structure. +.br +NB: both 1->0 and 0->1 transitions are counted except for +RI where only 0->1 is counted. .SS "Marking a line as local" .TP .BI "TIOCGSOFTCAR int *" argp
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tty_ioctl.4.patch
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