printf in udev085 rules? ENV{MODALIAS}=="?*"...

Thanks very much for information!
But, it is very surprising for me:
what could be a reason to put "printf" in the maintainer's set of rules (eg. devfs.rules)????
For future applications???
janusz

Quoted 12 lines · Greg KH

Quoted 2 lines · Janusz Borowski

Hi,
I would like to know if printf in udev rules could at all do something?

No, as there is no "console" at that point in time to be able to print to.

Try writing to a file instead.

Hope this helps,

Quoted 10 lines

greg k-h

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Hi,
also in v085 (ftp://ftp.kernel.org/pub/linux/utils/kernel/hotplug) there are "printfs" in rules:
udev.rules
50-udev-default.rules
for SUBSYSTEM="usb_device" and "dvb".
Maybe, in that moment when subsytems "dvb" and "usb_device" exists there is also defined stdout (or stderr ???)-
am I right?