Description of problem:

When the system boots, gpsd opens some of my USB serial ports and doesn't let them go.

I have 6 serial ports that I use for communicating with my test machines:

warthog>lsusb | grep FT232
Bus 002 Device 009: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 002 Device 010: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 002 Device 014: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 002 Device 015: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 002 Device 023: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC
Bus 002 Device 024: ID 0403:6001 Future Technology Devices International, Ltd FT232 USB-Serial (UART) IC

However, they match a rule in /etc/udev/rules.d/99-gpsd.rules and so start up gpsd.

Version-Release number of selected component (if applicable):

gpsd-2.95-6.fc15.x86_64

How reproducible:

100%

Steps to Reproduce:
1.Boot the system

or:

1.Kill gpsd.
2.Unplug and plug back in the USB serial port adapters.

[root@warthog linux-2.6-fscache]# ls -l /proc/29736/fd
total 0
lrwx------. 1 root root 64 Nov 10 19:09 0 -> /dev/null
lrwx------. 1 root root 64 Nov 10 19:09 1 -> /dev/null
lrwx------. 1 root root 64 Nov 10 19:09 10 -> /dev/ttyUSB2
lrwx------. 1 root root 64 Nov 10 19:11 11 -> /dev/ttyUSB0
lrwx------. 1 root root 64 Nov 10 19:11 12 -> /dev/ttyUSB1
lrwx------. 1 root root 64 Nov 10 19:09 2 -> /dev/null
lrwx------. 1 root root 64 Nov 10 19:09 3 -> socket:[21880336]
lrwx------. 1 root root 64 Nov 10 19:09 4 -> socket:[21878807]
lrwx------. 1 root root 64 Nov 10 19:09 5 -> socket:[21878808]
lrwx------. 1 root root 64 Nov 10 19:09 6 -> socket:[21878809]
lrwx------. 1 root root 64 Nov 10 19:09 8 -> /dev/ttyUSB3
lrwx------. 1 root root 64 Nov 10 19:09 9 -> socket:[21849722]

Stracing the daemon shows it's sitting there selecting on them:

[root@warthog linux-2.6-fscache]# strace -p 29736
Process 29736 attached - interrupt to quit
select(13, [3 4 5 8 10 11 12], NULL, NULL, {0, 375590}) = 0 (Timeout)
select(13, [3 4 5 8 10 11 12], NULL, NULL, {1, 0}) = 0 (Timeout)
select(13, [3 4 5 8 10 11 12], NULL, NULL, {1, 0}) = 0 (Timeout)
select(13, [3 4 5 8 10 11 12], NULL, NULL, {1, 0}) = 0 (Timeout)
select(13, [3 4 5 8 10 11 12], NULL, NULL, {1, 0}) = 0 (Timeout)
select(13, [3 4 5 8 10 11 12], NULL, NULL, {1, 0}^C <unfinished ...>

Which indicates another possible bug: why isn't it doing an infinitely long select?


Additionally, querying systemd with "systemctl --all | grep gps" shows:

dev-gps0.device           loaded active   plugged       FT232 USB-Serial (UART) IC
dev-gps1.device           loaded active   plugged       FT232 USB-Serial (UART) IC
dev-gps2.device           loaded active   plugged       FT232 USB-Serial (UART) IC
dev-gps3.device           loaded active   plugged       FT232 USB-Serial (UART) IC
dev-gps4.device           loaded active   plugged       FT232 USB-Serial (UART) IC
dev-gps5.device           loaded active   plugged       FT232 USB-Serial (UART) IC

though I've no idea why that thinks they're GPS ports - presumably something to do with udev.