Red Hat Bugzilla – Bug 176381
Better way to fetch device IDs from USB printers
Last modified: 2013-03-05 22:44:37 EST
printconf_conf.py contains this gem:
magic_perl = "perl -e 'ioctl(STDIN,0x84005001,$result);"
magic_perl += "print $result' 2>/dev/null <"
foo = os.popen (magic_perl + dev)
That magic number is supposed to be IOCNR_GET_DEVICE_ID(0x400), which is
_IOR(_IOC_READ, 'P', 1, 0x400), which in turn comes out at 0x44005001 on my
platform du jour. And thus autoprobe of USB printers is failing.
Created attachment 122564 [details]
kernel patch to make device ID available in sysfs
Would this help?
pmac /sys/devices # for a in `find . -name ieee1284_id` ; do cat $a ; echo ;
MFG:EPSON;CMD:ESCPL2,BDC,D4;MDL:Stylus Photo 830U;CLS:PRINTER;DES:EPSON Stylus
1200;CLS:PRINTER;DES:Hewlett-Packard LaserJet 1200;MEM:8MB
The kernel patch is now in the upstream kernel and also now building in the FC5
kernel-2.6.15-1.1826.2.6.FC5. Please use it :)
Did this get fixed for FC5? Do we use the information in sysfs instead of the
broken ioctl code now?
Busy fixing the larger problem of 'printconf is generally rubbish'. I expect
we'll use the sysfs code in hal.
Reassigning to hal so that it can make use of this new sysfs interface.
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