On Thu, 01 Aug 2002 13:27:11 +0200, Mario Camou writes:
>I'd check if there's any other process that might be holding ttyS1
>open... lsof might be useful there.
Nope, nothing listening on any of the serial ports.
If I read the strace-ouput from pilot-xfer -l correctly (probably I
don't):
<...>
24480 open("/dev/null", O_RDWR) = 3
24480 open("/dev/ttyS0", O_RDWR|O_NONBLOCK) = 4
24480 ioctl(4, SNDCTL_TMR_TIMEBASE, {c_iflags=0x4, c_oflags=0,
c_cflags=0x8bd, c_lflags=0x80, c_line=0, c_cc[VMIN]=1, c_cc[VTIME]=0,
c_cc="\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x2f\x9c\xf5\xff\xbf\x92\xc3\x13\x40\x04\x00\x00\x00\x60"}) = 0
24480 ioctl(4, SNDCTL_TMR_TIMEBASE, {c_iflags=0x4, c_oflags=0,
c_cflags=0x8bd, c_lflags=0x80, c_line=0, c_cc[VMIN]=1, c_cc[VTIME]=0,
c_cc="\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x2f\x1c\xf6\xff\xbf\xb7\x10\x03\x40\x04\x00\x00\x00\xe0"}) = 0
24480 ioctl(4, SNDCTL_TMR_START, {c_iflags=0x4, c_oflags=0,
c_cflags=0x8bd, c_lflags=0x80, c_line=0, c_cc[VMIN]=1, c_cc[VTIME]=0,
c_cc="\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x2f\x1c\xf6\xff\xbf\x62\x11\x03\x40\x04\x00\x00\x00\x00"}) = 0
24480 ioctl(4, SNDCTL_TMR_TIMEBASE, {c_iflags=0x4, c_oflags=0,
c_cflags=0x8bd, c_lflags=0x80, c_line=0, c_cc[VMIN]=1, c_cc[VTIME]=0,
c_cc="\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00
\x00\x00\x2f\x1c\xf6\xff\xbf\x62\x11\x03\x40\x04\x00\x00\x00\x00"}) = 0
24480 fcntl64(4, F_GETFL) = 0x802 (flags O_RDWR|O_NONBLOCK)
24480 fcntl64(4, F_SETFL, O_RDWR) = 0
24480 dup2(4, 3) = 3
24480 close(4) = 0
<...>
it opens /dev/ttyS0, only to close it soon afterwards (yes, I have it
on ttyS0 this time).
But what comes next seems like an endless loop:
24480 select(4, [3], NULL, NULL, NULL) = 1 (in [3])
24480 read(3, "\0", 1) = 1
24480 select(4, [3], NULL, NULL, NULL) = 1 (in [3])
24480 read(3, "\0", 1) = 1
<repeated ad nauseum>
Endlessly reading from /dev/null?
I'm stumped.
cheers,
&rw
--
-- The difference between sex and death is that with death
-- you can do it alone and no one is going to make fun of you.
-- - Woody Allen
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