[Samba] Semantics of "smb ports = 0"

Nikolaus Rath Nikolaus at rath.org
Wed Apr 25 08:04:30 MDT 2012


The qemu emulator has a feature to fork a samba instance for file
sharing with the emulated hosts. It communicates with smbd over stdin.
The generated configuration file contains a "smb ports = 0" directive to
prevent smbd from listening to any ports.

Unfortunately, with at least Samba 3.6.4 this causes a segfault

[0] vostro:/tmp/qemu-smb.6836-0# smbd -i -s smb.conf
Unable to setup corepath for smbd: Operation not permitted
smbd version 3.6.4 started.
Copyright Andrew Tridgell and the Samba Team 1992-2011
open_sockets_smbd: No sockets available to bind to.
Abnormal server exit: open_sockets_smbd() failed
BACKTRACE: 6 stack frames:
 #0 smbd(log_stack_trace+0x1a) [0x7fe50c14f8ba]
 #1 smbd(+0x6a0743) [0x7fe50c3bd743]
 #2 smbd(+0x6a0a41) [0x7fe50c3bda41]
 #3 smbd(main+0xa52) [0x7fe50be26d42]
 #4 /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7fe508ac0ead]
 #5 smbd(+0x10a6b9) [0x7fe50be276b9]

Also, there is some confusion as to whether this option was actually
ever necessary.

Could someone clarify if something like this is still needed, or if
Samba does the right think automatically? In the later case, has this
always been the case or was it introduced in a specific version (and the
"smb ports = 0" required before)?



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