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Fix GetCommState and SetCommState, so that these functions can be used

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to set/clear/read the DTR and RTS lines.
This commit is contained in:
Rein Klazes 2004-04-12 22:06:52 +00:00 committed by Alexandre Julliard
parent c2da57e27b
commit cef3983703
1 changed files with 56 additions and 16 deletions
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72
dlls/kernel/comm.c
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@ -1084,6 +1084,7 @@ BOOL WINAPI SetCommState(
{
struct termios port;
int fd, bytesize, stopbits;
BOOL ret;
TRACE("handle %p, ptr %p\n", handle, lpdcb);
TRACE("bytesize %d baudrate %ld fParity %d Parity %d stopbits %d\n",
@ -1092,6 +1093,11 @@ BOOL WINAPI SetCommState(
(lpdcb->StopBits == TWOSTOPBITS)?2:0);
TRACE("%s %s\n",(lpdcb->fInX)?"IXON":"~IXON",
(lpdcb->fOutX)?"IXOFF":"~IXOFF");
TRACE("fOutxCtsFlow %d fRtsControl %d\n", lpdcb->fOutxCtsFlow,
lpdcb->fRtsControl);
TRACE("fOutxDsrFlow %d fDtrControl%d\n", lpdcb->fOutxDsrFlow,
lpdcb->fDtrControl);
fd = get_comm_fd( handle, GENERIC_READ );
if (fd < 0) return FALSE;
@ -1385,11 +1391,6 @@ BOOL WINAPI SetCommState(
}
#endif
if (lpdcb->fDtrControl == DTR_CONTROL_HANDSHAKE)
{
WARN("DSR/DTR flow control not supported\n");
}
if (lpdcb->fInX)
port.c_iflag |= IXON;
else
@ -1400,16 +1401,39 @@ BOOL WINAPI SetCommState(
port.c_iflag &= ~IXOFF;
if (tcsetattr(fd,TCSANOW,&port)==-1) { /* otherwise it hangs with pending input*/
int save_error=errno;
ERR("tcsetattr error '%s'\n", strerror(errno));
COMM_SetCommError(handle,CE_IOE);
release_comm_fd( handle, fd );
ERR("tcsetattr error '%s'\n", strerror(save_error));
return FALSE;
ret = FALSE;
} else {
COMM_SetCommError(handle,0);
release_comm_fd( handle, fd );
return TRUE;
ret = TRUE;
}
/* note: change DTR/RTS lines after setting the comm attributes,
* so flow control does not interfere. */
#ifdef TIOCM_DTR
if (lpdcb->fDtrControl == DTR_CONTROL_HANDSHAKE)
{
WARN("DSR/DTR flow control not supported\n");
} else if(lpdcb->fDtrControl == DTR_CONTROL_DISABLE)
COMM_WhackModem(fd, ~TIOCM_DTR, 0);
else
COMM_WhackModem(fd, 0, TIOCM_DTR);
#endif
#ifdef TIOCM_RTS
if(!lpdcb->fOutxCtsFlow )
{
if(lpdcb->fRtsControl == RTS_CONTROL_DISABLE)
COMM_WhackModem(fd, ~TIOCM_RTS, 0);
else
COMM_WhackModem(fd, 0, TIOCM_RTS);
}
#endif
if(lpdcb->fRtsControl == RTS_CONTROL_TOGGLE)
FIXME("RTS_CONTROL_TOGGLE is not supported.\n");
release_comm_fd( handle, fd );
return ret;
}
@ -1432,14 +1456,19 @@ BOOL WINAPI GetCommState(
{
struct termios port;
int fd,speed;
int stat = DTR_CONTROL_ENABLE | RTS_CONTROL_ENABLE;
TRACE("handle %p, ptr %p\n", handle, lpdcb);
fd = get_comm_fd( handle, GENERIC_READ );
if (fd < 0) return FALSE;
if (tcgetattr(fd, &port) == -1) {
if (tcgetattr(fd, &port) == -1
#ifdef TIOCMGET
|| ioctl(fd, TIOCMGET, &stat) == -1
#endif
) {
int save_error=errno;
ERR("tcgetattr error '%s'\n", strerror(save_error));
ERR("tcgetattr or ioctl error '%s'\n", strerror(save_error));
COMM_SetCommError(handle,CE_IOE);
release_comm_fd( handle, fd );
return FALSE;
@ -1562,7 +1591,11 @@ BOOL WINAPI GetCommState(
/* termios does not support DTR/DSR flow control */
lpdcb->fOutxDsrFlow = 0;
lpdcb->fDtrControl = DTR_CONTROL_ENABLE;
lpdcb->fDtrControl =
#ifdef TIOCM_DTR
!(stat & TIOCM_DTR) ? DTR_CONTROL_DISABLE:
#endif
DTR_CONTROL_ENABLE ;
#ifdef CRTSCTS
@ -1572,7 +1605,11 @@ BOOL WINAPI GetCommState(
} else
#endif
{
lpdcb->fRtsControl = RTS_CONTROL_ENABLE;
lpdcb->fRtsControl =
#ifdef TIOCM_RTS
!(stat & TIOCM_RTS) ? RTS_CONTROL_DISABLE :
#endif
RTS_CONTROL_ENABLE ;
lpdcb->fOutxCtsFlow = 0;
}
if (port.c_iflag & IXON)
@ -1601,6 +1638,10 @@ BOOL WINAPI GetCommState(
(lpdcb->StopBits == TWOSTOPBITS)?2:0);
TRACE("%s %s\n",(lpdcb->fInX)?"IXON":"~IXON",
(lpdcb->fOutX)?"IXOFF":"~IXOFF");
TRACE("fOutxCtsFlow %d fRtsControl %d\n", lpdcb->fOutxCtsFlow,
lpdcb->fRtsControl);
TRACE("fOutxDsrFlow %d fDtrControl%d\n", lpdcb->fOutxDsrFlow,
lpdcb->fDtrControl);
#ifdef CRTSCTS
if ( lpdcb->fOutxCtsFlow ||
lpdcb->fRtsControl == RTS_CONTROL_HANDSHAKE
@ -1609,7 +1650,6 @@ BOOL WINAPI GetCommState(
else
TRACE("~CRTSCTS\n");
#endif
return TRUE;
}