Yes, found that a few minutes ago (strace is nice), micom does:
open("/dev/ttyUSB0", O_RDWR|O_NOCTTY|O_NONBLOCK) = 3
fcntl(3, F_GETFL) = 0x8802 (flags
O_RDWR|O_NONBLOCK|O_LARGEFILE)
fcntl(3, F_SETFL, O_RDWR|O_LARGEFILE) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, TIOCMGET, [TIOCM_DTR|TIOCM_RTS]) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_START or SNDRV_TIMER_IOCTL_TREAD or TCSETS, {B19200
-opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, TIOCMGET, [TIOCM_DTR|TIOCM_RTS]) = 0
ioctl(3, TIOCMSET, [TIOCM_DTR|TIOCM_RTS]) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_START or SNDRV_TIMER_IOCTL_TREAD or TCSETS, {B19200
-opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_START or SNDRV_TIMER_IOCTL_TREAD or TCSETS, {B19200
-opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_START or SNDRV_TIMER_IOCTL_TREAD or TCSETS, {B19200
-opost -isig -icanon -echo ...}) = 0
ioctl(3, SNDCTL_TMR_TIMEBASE or SNDRV_TIMER_IOCTL_NEXT_DEVICE or TCGETS,
{B19200 -opost -isig -icanon -echo ...}) = 0
ioctl(3, TCFLSH, 0x2) = 0
should that be changed in the standard serial.pp ?
On 08/18/2011 11:51 AM, Henry Vermaak wrote:
On 18/08/11 10:34, Armin Diehl wrote:
Hi Peter,
that is the same as in the standard serial.pp:
Result := fpopen(DeviceName, O_RDWR or O_NOCTTY);
and this fpopen will block as long as minicom is not started on that
device.
Try to add O_NONBLOCK to the flags with fpopen. Then set CLOCAL like
Peter suggested. Then disable O_NONBLOCK again with fcntl if you want
blocking I/O back.
Henry
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