Hello Patrick,
Thanks a lot for your reply.
I have created the devices like this:
la /dev/misc
total 0
drwxrwxrwx 2 root root 80 May 30 21:32 .
drwxr-xr-x 11 root root 5820 May 30 21:33 ..
crwxrwxrwx 1 root root 10, 62 May 30 21:32 dlm-control
crwxrwxrwx 1 root root 10, 61 May 30 21:32 dlm_default
Now I can run dlmtest as root but as non-root I get this:
dlmtest abcd
locking abcd EX ...
lock: Operation not permitted
Is it possible to use DLM as non-root?
Strace shows this at the end:
write(2, "locking abcd EX ...", 19) = 19
brk(0) = 0x502000
brk(0x523000) = 0x523000
open("/dev/misc/dlm_default", O_RDWR) = -1 ENODEV (No such device)
stat("/dev/misc/dlm-control", {st_mode=S_IFCHR|0766, st_rdev=makedev(10,
62), ...}) = 0
open("/proc/misc", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
0x2a9565b000
read(3, " 62 dlm-control\n183 hw_random\n 6"..., 1024) = 67
close(3) = 0
munmap(0x2a9565b000, 4096) = 0
open("/dev/misc/dlm-control", O_RDWR) = 3
fcntl(3, F_SETFD, FD_CLOEXEC) = 0
write(3, "\3\0\0\0\0\0\0\0\0\0\0\0\4\0\0\0\1\0\0\0\177\0\0\0defa"..., 143) =
-1 EPERM (Operation not permitted)
write(2, "\n", 1) = 1
write(2, "lock: Operation not permitted\n", 30) = 30
exit_group(-1) = ?
Regards,
Christos
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