> > Hello, > > On Jan 16 12:27 Josu Lazkano wrote (shortened): > >> Hello everybody! I have a HP ScanJet 2400 scanner. I can scan normally >> with >> this command: >> >> scanimage -d hp2400:libusb:001:006 --format=tiff > Desktop/image.tiff >> >> But if I change the scanner USB port, the device address change: >> >> $ scanimage -L >> device `hp2400:libusb:001:004' is a Hewlett-Packard hp2400 flatbed >> scanner > ... >> I use the "scanimage" command on a script, so if I change the USB port I >> must edit script. >> >> Is possible to assign always the same port? > > No. > Because udev (or whatever it is, perhaps libusb or kernel?)
There is even a worse case. If you have multiple scanners of the same type connected to the same box you can only distinguish them if they provide some kind of unique id/serial number whatever - many devices don't do that :( Regards, Simon > is somewhat broken by design because it assigns different > device nodes to same devices (there are whatever technical > reasons for this). > > Therefore your script must work with changing SANE devices. > > scanimage -f '%d,' > lists the currently available SANE devices (see "man scanimage") > so that you could use command substitution for example like > > scanimage -d $( scanimage -f '%d,' | tr ',' '\n' | grep hp2400 ) \ > --format=tiff > Desktop/image.tiff > > The bash is needed for the nice $(...) command substitution syntax. > Otherwise use your appropriate shell syntax for command substitution > or the old-style backquote/backtick (accent grave) form in bash > which could be confused with other kind of accent characters. > > > Kind Regards > Johannes Meixner > -- > SUSE LINUX Products GmbH, Maxfeldstrasse 5, 90409 Nuernberg, Germany > AG Nuernberg, HRB 16746, GF: Markus Rex > > -- > sane-devel mailing list: sane-devel at lists.alioth.debian.org > http://lists.alioth.debian.org/mailman/listinfo/sane-devel > Unsubscribe: Send mail with subject "unsubscribe your_password" > to sane-devel-request at lists.alioth.debian.org >
