Re: How to auto-detect a USB drive?
I do something like this. Here's the rules I have
in /usr/local/etc/devd.conf
...
attach 10 {
match device-name umass0;
action sleep 2; /root/bin/usbstick_attach /dev/console;
};
I've tried something similar and I'm having good success. I should be able
accomplish what I need with this approach.
One question: Is there a way to check the label of a device before mounting it?
I assume so, since when I insert a FAT32 formatted USB stick I see the
messages:
Mar 12 10:29:05 r02s17 kernel: GEOM_LABEL: Label for provider da0s1 is
msdosfs/MAXIFS.
Mar 12 10:29:06 r02s17 kernel: GEOM_LABEL: Label msdosfs/MAXIFS removed.
Can I easily get this same information?
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How to auto-detect a USB drive?
I want to have a process running on my FreeBSD box that automatically detects when a USB drive is inserted. What's the easiest way to accomplish this? I know I could simply monitor /var/log/messages and look for the appropriate events to appear, but is there a more elegant way? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wed, 11 Mar 2009 07:42:04 -0700 (PDT), Peter Steele pste...@maxiscale.com wrote: I want to have a process running on my FreeBSD box that automatically detects when a USB drive is inserted. What's the easiest way to accomplish this? I know I could simply monitor /var/log/messages and look for the appropriate events to appear, but is there a more elegant way? The system will monitor it itself. :-) My question to you would be: What exactly do you mean by automatically detect? The drive *is* automatically detected. Should it be mounted afterwards? The creation of the device files (after system startup) is controlled by the file /etc/devfs.rules. You can use automounters to automatically mount devices when they appear. In order how to determine file systems, slices and partitions on such an USB device, you could, for example, have a look at how FreeSBIE does it. Additionally, there are already tools integrated in KDE and Gnome that automount USB devices. -- Polytropon From Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
devd.conf On Wed, 11 Mar 2009, Peter Steele wrote: I want to have a process running on my FreeBSD box that automatically detects when a USB drive is inserted. What's the easiest way to accomplish this? I know I could simply monitor /var/log/messages and look for the appropriate events to appear, but is there a more elegant way? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
My question to you would be: What exactly do you mean by automatically detect? The drive *is* automatically detected. Should it be mounted afterwards? Yeah, I guess my wording was a little vague. I know that the system automatically detects when a USB drive is inserted, and creates the appropriate entries under /dev. I want to follow this up with having the drive automatically mounted, and I'll then examine the USB drive for specific files I expect to be present, and possible run something that's installed on the disk, then unmount the disk. We want to use this approach to deploy our software on large clusters of machines that may not have an IP identity. You can use automounters to automatically mount devices when they appear. In order how to determine file systems, slices and partitions on such an USB device, you could, for example, have a look at how FreeSBIE does it. If I can hook into an event that signals when a USB disk is inserted, I can take care of verifying the disk is in the format we expect it to be. Additionally, there are already tools integrated in KDE and Gnome that automount USB devices. Our boxes have no GUI so these may not work for us. We have a more specific application though and do not need a general purpose automounter. -- Polytropon From Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
This looks like it will do exactly what I need. Thanks for the pointer! - Original Message - From: Wojciech Puchar woj...@wojtek.tensor.gdynia.pl To: Peter Steele pste...@maxiscale.com Cc: questi...@freebsd.org Sent: Wednesday, March 11, 2009 8:08:20 AM GMT -08:00 US/Canada Pacific Subject: Re: How to auto-detect a USB drive? devd.conf On Wed, 11 Mar 2009, Peter Steele wrote: I want to have a process running on my FreeBSD box that automatically detects when a USB drive is inserted. What's the easiest way to accomplish this? I know I could simply monitor /var/log/messages and look for the appropriate events to appear, but is there a more elegant way? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wed, Mar 11, 2009 at 08:10:46AM -0700, Peter Steele wrote:
My question to you would be: What exactly do you mean by
automatically detect? The drive *is* automatically detected.
Should it be mounted afterwards?
Yeah, I guess my wording was a little vague. I know that the system
automatically detects when a USB drive is inserted, and creates the
appropriate entries under /dev. I want to follow this up with having
the drive automatically mounted, and I'll then examine the USB drive
for specific files I expect to be present, and possible run something
that's installed on the disk, then unmount the disk. We want to use
this approach to deploy our software on large clusters of machines
that may not have an IP identity.
The easiest way (I think) is to use devd, in combination with a USB
drive that has a unique label.
Say you have a USB drive formatted with a UFS filesystem. You use
'tunefs -L' to give this drive a unique label,
e.g. 'FOO'. Then you can put the following in /etc/devd.conf
notify 1000 {
match systemDEVFS;
match subsystem CDEV;
match cdev /dev/ufs/FOO;
action sh /usr/local/sbin/autorun /dev/ufs/FOO ;
};
Where the script /usr/local/sbin/autorun would contain the required actions
(mount, check, run, umount, beep).
The reason for using a labeled device is that you might not want to run
the script on any old USB drive! If you want to use a FAT formatted
drive you should use /dev/msdosfs/FOO for the path.
Last week I submitted a patch to get this system and subsystem
documented in the manual page of devd.conf. It should be in CURRENT now,
and will be MFC'd to STABLE in a week or so.
Roland
--
R.F.Smith http://www.xs4all.nl/~rsmith/
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Re: How to auto-detect a USB drive?
Last week I submitted a patch to get this system and subsystem documented in the manual page of devd.conf. It should be in CURRENT now, and will be MFC'd to STABLE in a week or so. This looks like exactly what we need, except we're using 7.0, and are too close to releasing 1.0 of our software to make a switch to 7.1 now (QA would want to run weeks of testing). What are the issues with devd and 7.0? ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wed, Mar 11, 2009 at 10:49:18AM -0700, Peter Steele wrote: Last week I submitted a patch to get this system and subsystem documented in the manual page of devd.conf. It should be in CURRENT now, and will be MFC'd to STABLE in a week or so. This looks like exactly what we need, except we're using 7.0, and are too close to releasing 1.0 of our software to make a switch to 7.1 now (QA would want to run weeks of testing). What are the issues with devd and 7.0? It's missing the call to devctl_notify in the devfs handling. This was added to RELENG_7 on the 28th of May 2008. You'll need at least rev. 1.208.2.4 of /usr/src/sys/kern/kern_conf.c. See: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/kern/kern_conf.c?f=uonly_with_tag=RELENG_7logsort=date Roland -- R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) pgpSm2i7ZRcDO.pgp Description: PGP signature
Re: How to auto-detect a USB drive?
On Wednesday 11 March 2009, Peter Steele wrote:
Yeah, I guess my wording was a little vague. I know that the system
automatically detects when a USB drive is inserted, and creates the
appropriate entries under /dev. I want to follow this up with having
the drive automatically mounted, and I'll then examine the USB drive
for specific files I expect to be present, and possible run something
that's installed on the disk, then unmount the disk. We want to use
this approach to deploy our software on large clusters of machines
that may not have an IP identity.
I do something like this. Here's the rules I have
in /usr/local/etc/devd.conf
#-
#
# Generic USB devices
#
attach 10 {
match device-name umass0;
action sleep 2; /root/bin/usbstick_attach /dev/console;
};
#
# Cameras
#
attach 20 {
match device-name umass0;
match vendor 0x(07b4|04b0);
action /bin/sleep 2 mount -t msdosfs /dev/da0s1 /camera
/root/bin/camcopy umount /camera echo ^G /dev/console;
};
#-
For most USB storage devices /root/bin/usbstick_attach parses the output
of `camcontrol devlist` looking for entries like (da*,pass*) or
(pass*,da*) and then it sets the permissions on the device to 660 and,
for convenience, creates a link called usbstick in the dev directory
pointing to the real device. This way the I can always
mount /dev/usbstick on one of my own subdirectories without having to
determine what device was created. I could have made the script mount
the USB stick but if I have to make the effort to mount it myself I
might be more likely to remember to unmount it afterwards.
The cameras are a special case since all I want to do is to check for
new photos and copy them to my photo archive so if devd detects one of
my cameras it mounts the camera with the higher priority attach 20
rule which invokes /root/bin/camcopy to copy the photos before
unmounting the camera and sounding the console bell to let me know I
can unplug it.
The scripts are a bit primitive and get totally confused if I insert
more than one USB storage device at a time so would need some
refinement for general use but work OK for me as the only user on this
PC.
--
Mike Clarke
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Re: How to auto-detect a USB drive?
It's missing the call to devctl_notify in the devfs handling. This was added to RELENG_7 on the 28th of May 2008. You'll need at least rev. 1.208.2.4 of /usr/src/sys/kern/kern_conf.c. See: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/kern/kern_conf.c?f=uonly_with_tag=RELENG_7logsort=date Looks like were out of luck then. Our version is 1.208.2.1 from circa 2007/12/07. I assume we can't just replace this one file with the latest version? We simply cannot move to 7.1 at this point. We have some substantial kernel mods that would need to be ported and tested in the 7.1 code base and there simply isn't time for that. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wed, Mar 11, 2009 at 10:49:18AM -0700, Peter Steele wrote: Last week I submitted a patch to get this system and subsystem documented in the manual page of devd.conf. It should be in CURRENT now, and will be MFC'd to STABLE in a week or so. This looks like exactly what we need, except we're using 7.0, and are too close to releasing 1.0 of our software to make a switch to 7.1 now (QA would want to run weeks of testing). An alternative solution is to run a script from a cron job that checks for the labeled device and performs the necessary actions if found. It could mean that you have to wait up to a minute (the minimum granularity of cron) for the process to start. You have to make sure that the script fails gracefully if it is started while a previous instance is still running! Roland -- R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) pgplYcLWbu2Ah.pgp Description: PGP signature
Re: How to auto-detect a USB drive?
The scripts are a bit primitive and get totally confused if I insert more than one USB storage device at a time so would need some refinement for general use but work OK for me as the only user on this PC. Thanks, I'll give this a try and see how it works. We have a very simple requirement as well so something primitive will be enough, as long as it works. ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wed, Mar 11, 2009 at 06:09:24PM +, Mike Clarke wrote: snip The scripts are a bit primitive and get totally confused if I insert more than one USB storage device at a time so would need some refinement for general use but work OK for me as the only user on this PC. If you give the msdosfs filesystem a unique label (with e.g. mlabel from emulators/mtools), you'll get a unique device in /dev/msdosfs/. Roland -- R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) pgpGZFmxDKnA1.pgp Description: PGP signature
Re: How to auto-detect a USB drive?
On Wed, Mar 11, 2009 at 11:13:08AM -0700, Peter Steele wrote: It's missing the call to devctl_notify in the devfs handling. This was added to RELENG_7 on the 28th of May 2008. You'll need at least rev. 1.208.2.4 of /usr/src/sys/kern/kern_conf.c. See: http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/kern/kern_conf.c?f=uonly_with_tag=RELENG_7logsort=date Looks like were out of luck then. Our version is 1.208.2.1 from circa 2007/12/07. I assume we can't just replace this one file with the latest version? It might work. You'd have to look around in the CVS database [cvsweb.freebsd.org] to see if the changes in question touch other files as well. We simply cannot move to 7.1 at this point. We have some substantial kernel mods that would need to be ported and tested in the 7.1 code base and there simply isn't time for that. Then try another solution: a cron job, as explained in another msg. Roland -- R.F.Smith http://www.xs4all.nl/~rsmith/ [plain text _non-HTML_ PGP/GnuPG encrypted/signed email much appreciated] pgp: 1A2B 477F 9970 BA3C 2914 B7CE 1277 EFB0 C321 A725 (KeyID: C321A725) pgp6jwfUunvQW.pgp Description: PGP signature
Re: How to auto-detect a USB drive?
Then try another solution: a cron job, as explained in another msg. Yeah, that's probably the simplest approach. This was my first thought, but I figured there'd be a more elegant way of doing it if I could tie into the drive insert event ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: How to auto-detect a USB drive?
On Wednesday 11 March 2009, Roland Smith wrote: If you give the msdosfs filesystem a unique label (with e.g. mlabel from emulators/mtools), you'll get a unique device in /dev/msdosfs/. Yes, but sometimes I'll be transferring data to or from someone else's USB stick so I can't make any assumptions about how the filesystem has been labeled. -- Mike Clarke ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
