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 ; done MFG:EPSON;CMD:ESCPL2,BDC,D4;MDL:Stylus Photo 830U;CLS:PRINTER;DES:EPSON Stylus Photo 830U; MFG:Hewlett-Packard;CMD:PJL,MLC,PCL,PCLXL,POSTSCRIPT;MDL:HP LaserJet 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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