Hi all,

I'm experiencing a weird issue. I'm currently running Synology DSM 5.2 (Intel Atom) on an Synology NAS. Everything appears to be normal, other than ls -l and su not working, which were working up until a few days ago. I've played around with some third party ipkg packages which may have had an effect on this.

I can run 'ls -l' successfully in any directory other than /volume1 and it's sub-directories.

I can run 'ls' successfully in any directory, including volume1 and its sub-directories.

Here's the error when I run 'ls -l' from /volume1:
Segmentation fault (core dumped)

I get the same error when running 'su'. I'm already logged in as root though.

Here's the output of 'gdb su'
dlopen failed on 'libthread_db.so.1' - libthread_db.so.1: cannot open shared object file: No such file or directory
GDB will not be able to debug pthreads.

Errors in dmesg:
[4080072.749862] ls[25631]: segfault at 500 ip 00000000f6c506f1 sp 00000000ffd7a6e4 error 4 in libpthread.so.0[f6c4b000+17000]
[4080271.892995] su[26977]: segfault at 500 ip 00000000f6c116f1 sp 00000000ff96bf78 error 4 in libpthread.so.0[f6c0c000+17000]

/usr/lib also doesn't contain libthread_db*

Any help appreciated.

Thanks

The library is missing. Programs that need this library won't run.

You should have tools that allow you to find out which package the missing file belongs to, e.g. apt-cache if your OS is Debian-based. Reinstall that package.

Thought so, but what makes me think otherwise is that I can run ls -l in other directories, just not /volume1.

I've also downloaded libthread_db.so.1 and have placed it into the /usr/libs directory which hasn't made any difference, so I'm guessing I need to 'register or 'install' it. Only thing is, the OS doesn't have ldconfig. Am I on the right track, is there any other more manual way of sorting this out?

I don't know where your distro stores things, but in my 64bit debian the file libthread_db.so.1 is in /lib/x86_64-linux-gnu and is a symbolic link to a different version number (mine is libthread_db.-1.0.so so maybe you should look in /lib and see what is there