diff options
Diffstat (limited to 'winsup/cygwin/fhandler_serial.cc')
| -rw-r--r-- | winsup/cygwin/fhandler_serial.cc | 97 |
1 files changed, 60 insertions, 37 deletions
diff --git a/winsup/cygwin/fhandler_serial.cc b/winsup/cygwin/fhandler_serial.cc index 3c6a3bcdc..3910ee97d 100644 --- a/winsup/cygwin/fhandler_serial.cc +++ b/winsup/cygwin/fhandler_serial.cc @@ -376,6 +376,56 @@ fhandler_serial::tcflow (int action) } +/* switch_modem_lines: set or clear RTS and/or DTR */ +int +fhandler_serial::switch_modem_lines (int set, int clr) +{ + int res = 0; + + if (set & TIOCM_RTS) + { + if (EscapeCommFunction (get_handle (), SETRTS)) + rts = TIOCM_RTS; + else + { + __seterrno (); + res = -1; + } + } + else if (clr & TIOCM_RTS) + { + if (EscapeCommFunction (get_handle (), CLRRTS)) + rts = 0; + else + { + __seterrno (); + res = -1; + } + } + if (set & TIOCM_DTR) + { + if (EscapeCommFunction (get_handle (), SETDTR)) + rts = TIOCM_DTR; + else + { + __seterrno (); + res = -1; + } + } + else if (clr & TIOCM_DTR) + { + if (EscapeCommFunction (get_handle (), CLRDTR)) + rts = 0; + else + { + __seterrno (); + res = -1; + } + } + + return res; +} + /* ioctl: */ int fhandler_serial::ioctl (unsigned int cmd, void *buffer) @@ -432,44 +482,17 @@ fhandler_serial::ioctl (unsigned int cmd, void *buffer) } break; case TIOCMSET: - if (ipbuffer & TIOCM_RTS) - { - if (EscapeCommFunction (get_handle (), SETRTS)) - rts = TIOCM_RTS; - else - { - __seterrno (); - res = -1; - } - } - else - { - if (EscapeCommFunction (get_handle (), CLRRTS)) - rts = 0; - else - { - __seterrno (); - res = -1; - } - } - if (ipbuffer & TIOCM_DTR) - { - if (EscapeCommFunction (get_handle (), SETDTR)) - dtr = TIOCM_DTR; - else - { - __seterrno (); - res = -1; - } - } - else if (EscapeCommFunction (get_handle (), CLRDTR)) - dtr = 0; - else - { - __seterrno (); - res = -1; - } + if (switch_modem_lines (ipbuffer, ~ipbuffer)) + res = -1; break; + case TIOCMBIS: + if (switch_modem_lines (ipbuffer, 0)) + res = -1; + break; + case TIOCMBIC: + if (switch_modem_lines (0, ipbuffer)) + res = -1; + break; case TIOCCBRK: if (ClearCommBreak (get_handle ()) == 0) { |