On Sat, 14 May 2016, Stephen Furner wrote: > There seems to be something in addition to just the usb file access > priverlages. When I changed them it changed the error message it did > not resolve the problem as was expected. > > I used the following CHMOD command to change the access priverlages > for the usb files > > chmod 666 /dev/bus/usb -R This command is wrong. It sets the same permissions for the directories and the files, but the directories need to have execute permission as well. The permissions on /dev/bus/usb and /dev/bus/usb/* were correct. What was wrong was the permissions for /dev/bus/usb/003/003 (or whichever file corresponds to the Garmin). Why haven't you tried installing the /etc/udev/rules.d/ file? This is the third time I've told you to do it. > This gave me rw priverlages on the usb files for all users > > stephen@stephen-N150P:/$ sudo ls -l dev/bus/usb > [sudo] password for stephen: > total 0 > drw-rw-rw- 2 root root 100 May 11 14:39 001 > drw-rw-rw- 2 root root 80 May 14 03:18 002 > drw-rw-rw- 2 root root 80 May 12 21:04 003 > drw-rw-rw- 2 root root 60 May 11 14:39 004 > drw-rw-rw- 2 root root 60 May 11 14:39 005 > > When I tried to use gebabbel or viking to download the tracks from the > gps I got the error message "Found no Garmin USB devices." > > listing the usb devices does however show it is present. > > stephen@stephen-N150P:/$ lsusb > Bus 001 Device 004: ID 0ac8:c33f Z-Star Microelectronics Corp. Webcam > Bus 001 Device 003: ID 0781:5567 SanDisk Corp. Cruzer Blade > Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub > Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 003 Device 002: ID 0a5c:219c Broadcom Corp. > Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > Bus 002 Device 005: ID 091e:0003 Garmin International GPS (various models) > Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub > > > Using gpsbabel on the command line without root privileges to download > from the gps also generates the same error message. An strace of > gpsbabel provided the following excerpt. > > openat(AT_FDCWD, "/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 > getdents(3, /* 7 entries */, 32768) = 168 > close(3) = 0 > openat(AT_FDCWD, "/dev/bus/usb", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3 > getdents(3, /* 7 entries */, 32768) = 168 > getdents(3, /* 0 entries */, 32768) = 0 > close(3) = 0 > openat(AT_FDCWD, "/dev/bus/usb/005", > O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = -1 EACCES (Permission > denied) > write(2, "Found no Garmin USB devices.\n", 29Found no Garmin USB devices. > ) = 29 > exit_group(1) That's what happens when a directory doesn't have execute permission. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
