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here is argument support for CALLOUT exec:
CALLOUT, PROGRAM="/bin/echo -n xxx", BUS="usb", ID="xxx", NAME="webcam%n"
results in:
Nov 20 02:35:20 pim udev[30422]: get_major_minor: found major = 81, minor = 0
Nov 20 02:35:20 pim udev[30422]: exec_callout: callout to /bin/echo -n xxx
Nov 20 02:35:20 pim udev[30422]: exec_callout: callout returned 'xxx'
Nov 20 02:35:20 pim udev[30422]: get_attr: kernel number appended: 0
The feature is really nice, but the maximum argument count is hard coded to 8.
I want to bring the CALLOUT field ordering in line with the other
methods, cause the current parsing relies on the ordering it's good
to have it like the others. The BUS= is now the first expected field.
Also made the last two remaining field names to uppercase and the man page
callout example is updated.
here is mainly a whitespace cleanup for namedev.c. I changed the
dbg_parse() output a bit for better readability:
current:
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER temp='/2-1.1' id='00:07.1'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER temp='/2-1' id='00:07.1'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER temp='/2-1.1' id='00:0b.0'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER temp='/2-1' id='00:0b.0'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:00:59 pim udev[25582]: do_number: NUMBER temp='/2-1.1' id='2-1.1'
Nov 19 19:00:59 pim udev[25582]: do_number: device id '2-1.1' becomes 'webcam%n' - owner='', group ='', mode=0
becomes:
Nov 19 19:23:40 pim udev[26091]: do_number: search '00:07.1' in '/2-1.1', path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:23:40 pim udev[26091]: do_number: search '00:07.1' in '/2-1', path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1'
Nov 19 19:23:40 pim udev[26091]: do_number: search '00:0b.0' in '/2-1.1', path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:23:40 pim udev[26091]: do_number: search '00:0b.0' in '/2-1', path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1'
Nov 19 19:23:40 pim udev[26091]: do_number: search '2-1.1' in '/2-1.1', path='/sys/devices/pci0000:00/0000:00:1d.1/usb2/2-1/2-1.1'
Nov 19 19:23:40 pim udev[26091]: do_number: found id '2-1.1', 'video0' becomes 'webcam%n' - owner='', group ='', mode=0
Permissions given in udev.permissions are not applied if no METHOD from
udev.config is found. I've added do_kernelname() to scan for known
permissions if we only use the default method.
Simple support for wildcards is also added:
#name:user:group:mode
hdb*:2702:2702:0660
results in:
drwxr-xr-x 2 root root 240 Nov 19 03:45 .
drwxr-xr-x 23 root root 528 Nov 17 03:36 ..
brw-r--r-- 1 root root 3, 0 Nov 19 03:45 hda
brw-r--r-- 1 root root 3, 1 Nov 19 03:45 hda1
brw-r--r-- 1 root root 3, 2 Nov 19 03:45 hda2
brw-r--r-- 1 root root 3, 4 Nov 19 03:45 hda4
brw-r----- 1 kay kay 3, 64 Nov 19 03:45 hdb
brw-r----- 1 kay kay 3, 65 Nov 19 03:45 hdb1
brw-r--r-- 1 root root 22, 0 Nov 19 03:45 hdc
crw-r--r-- 1 root root 81, 0 Nov 19 03:34 webcam0
I've attached a patch against 005 for both the block and tty scripts. I
didn't bother running udev backgrounded, since as you say, the new code
runs a lot faster.
After getting a number of different crashes for udev reading broken
udev.config files, I decided to try to make the parser a little
more robust.
The behaviour is changed to stop reading the configuration file
and logging the broken entry instead of silently ignoring it (is
that good? It's easy to just print and continue).
All strcpy()'s to a fixed length string are now implicitly limited
to the bounds of the target string.
I kept the -ENODEV return code for now, not sure if there should be
different ones.
On Tuesday 18 November 2003 02:14, Greg KH wrote:
> On Mon, Nov 17, 2003 at 06:33:32PM +0100, Arnd Bergmann wrote:
> > That would at least be part of the solution I'm looking for. How about
> > extra format characters for bus_id and for the result of a callout
> > program?
>
> Sure, I can see the use for that. Want to send a patch? :)
> Take a look at the current bk tree (which has moved to
> bk://linuxusb.bkbits.net/udev/ ) I've made finding that device a lot
> easier now, and it works for all rule types.
Great, just what I was missing. I didn't see the any link to the bk
repository. Here's the patch for the bus_id. I'll need to think about
the handling of callout results a bit more.
> Problem is, if you use the LABEL rule to match a device, like a SCSI
> vendor, then all of the partitions, as well as the main block device,
> will end up with the same name. That's why I added the "add the number"
> hack to the LABEL rule.
>
> So yes, your patch is correct in that we shouldn't always be adding the
> number to any match for LABEL (like for char devices), but if we do
> that, then we break partitions. Your '%' patch fixes this, but I'd just
> like to extend it a bit. Let me see what I can come up with...
Oh, I see. Do you mean something like this:
LABEL, BUS="usb", model="Creative Labs WebCam 3", NAME="webcam%n-%M:%m-test"
results in: "webcam0-81:0-test"
Nov 15 16:51:53 pim udev[16193]: get_class_dev: looking at /sys/class/video4linux/video0
Nov 15 16:51:53 pim udev[16193]: get_class_dev: class_dev->name = video0
Nov 15 16:51:53 pim udev[16193]: get_major_minor: dev = 81:0
Nov 15 16:51:53 pim udev[16193]: get_major_minor: found major = 81, minor = 0
Nov 15 16:51:53 pim udev[16193]: udev_add_device: name = webcam0-81:0-test
Nov 15 16:51:53 pim udev[16193]: create_node: mknod(/udev/webcam0-81:0-test, 020666, 81, 0)
implement printf-like placeholder support for NAME
%n-kernel number, %M-major number, %m-minor number
Here's a quick patch to:
1) Add an environment variable "SYSFS_PATH" that libsysfs will check
for when getting mount point before searching system's sysfs mount
point.
2) A quick fix to sysfs_get_link where the bug was.
I have tested this out with libsysfs and with udev. I couldn't test
with klibc because I haven't got the tree to build with klibc without
my changes either. I made the link but get an error finding
linux/linits.h. I will figure that out.
Please have a look at the patch. If it's agreeable, please test it. I
really want to add some generic path manipulation functions for the
sysfs_get_link error, rather than my patch's hack. But, I haven't had
time yet to do that. You really sounded like you needed this for
testing, so I'm sending it out to you. I should probably add a
function to set the env variable(?).
