nut-scanner from nut package tries to load dynamically /lib/libusb.so which is not available on Gentoo libusb:0. Reproducible: Always Steps to Reproduce: 1. emerge nut-2.6.5 2. run # nut-scanner -U Actual Results: nut-scanner reports > Cannot load USB library (libusb) : file not found. USB search disabled. Expected Results: nut-scanner -U should successfully scan UPS USB devices. It seems that either libusb:0 does not provide proper symlinks or nut-2.6.5 is not localized for Gentoo (x64) layout. When running nut-scanner under strace it seems that utility mostly scans for /lib/libusb* files while libusb:0 only provides /lib64/libusb* stuff.
carnivoor ~ # nut-scanner Cannot load USB library (libusb) : file not found. USB search disabled. No start IP, skipping SNMP No start IP, skipping NUT bus (old connect method) Segmentation fault
I can't reproduce this: # strace -ff nut-scanner 2>&1 |grep libusb open("/lib/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib64/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib64/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/local/lib64/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib32/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib32/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/local/lib32/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/lib/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/lib/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) open("/usr/local/lib/libusb.la", O_RDONLY) = -1 ENOENT (No such file or directory) ... access("/lib/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/usr/lib/libusb.so", R_OK) = 0 open("/usr/lib/libusb.so", O_RDONLY|O_CLOEXEC) = 3 open("/usr/lib64/libusb-1.0.so.0", O_RDONLY|O_CLOEXEC) = 3 Also, as in my case /usr/lib is a symlink to /usr/lib64, I removed the symlink, and I confirm it DOES check both locations: access("/lib/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/usr/lib/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/lib64/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/usr/lib64/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/usr/local/lib64/libusb.so", R_OK) = -1 ENOENT (No such file or directory) access("/lib32/libusb.so", R_OK) = -1 ENOENT (No such file or directory)
