1SAMBA-DCERPCD(8) System Administration tools SAMBA-DCERPCD(8)
2
6 samba-dcerpcd - This is one of Samba's DCERPC server processes that can
7 listen on sockets where RPC services are offered and is the parent
8 process of the DCERPC services it invokes. Unless separately invoked it
9 is started on demand from smbd or winbind and serves DCERPC only over
10 named pipes (np) as a helper process. This will be the standard setup
11 for most installations (standalone/member server/AD server) unless they
12 modify their startup scripts. Note in when Samba is configured as an
13 Active Directory Domain controller the samba process that invokes smbd
14 will still provide its normal DCERPC services, not samba-dcerpcd. When
15 separately invoked by system startup scripts or a a daemon, the global
16 smb.conf option rpc start on demand helpers = false MUST be set to
17 allow samba-dcerpcd to start standalone.
18
20 samba-dcerpcd [-D|--daemon] [-i|--interactive] [-F|--foreground]
21 [--no-process-group] [-d <debug level>] [--debug-stdout]
22 [--configfile=<configuration file>] [--option=<name>=<value>]
23 [--leak-report] [--leak-report-full] [-V|--version] [--libexec-rpcds]
24 [--np-helper] [--ready-signal-fd=<fd>] [<SERVICE_1>] [<SERVICE_2>]
25 [<...>]
26
28 This tool is part of the samba(7) suite.
29 samba-dcerpcd can be used in two ways. In the normal case without
31 startup script modification and the global smb.conf option rpc start on
32 demand helpers = true is set (the default setting), it is invoked on
33 demand from smbd or winbind with a command line containing--np-helper
34 to serve DCERPC over named pipes (np). It can also be used in a
35 standalone mode where it is started separately from smbd or winbind via
36 system startup scripts. If invoked as a standalone daemon or started
37 from system startup scripts the global smb.conf option rpc start on
38 demand helpers = false MUST be set to false. If the global smb.conf
39 option rpc start on demand helpers = true is set to true or left as
40 default, samba-dcerpcd will fail to start and log an error message.
41 Note that when Samba is run in the Active Directory Domain Controller
43 mode the samba AD code will still provide its normal DCERPC services
44 whilst allowing samba-dcerpcd to provide services like SRVSVC in the
45 same way that smbd used to in this configuration.
46 The standalone mode can also be useful for use outside of the Samba
48 framework, for example, use with the Linux kernel SMB2 server ksmbd or
49 possibly other SMB2 server implementations. In this mode it behaves
50 like inetd and listens on sockets on behalf of RPC server
51 implementations.
52 When a client connects, samba-dcerpcd will start the relevant RPC
54 service binary on demand and hand over the connection to that service.
55 When an RPC service has been idle for a while, samba-dcerpcd will ask
56 it to shut down again.
57
59 -D|--daemon
60 If specified, this parameter causes the server to operate as a
61 daemon. That is, it detaches itself and runs in the background,
62 fielding requests on the appropriate port. Operating the server as
63 a daemon is useful for running samba-dcerpcd outside of the Samba
64 framework. However, it can also be used in this way within Samba
65 for member servers if configured to start up via system startup
66 scripts. This switch is assumed if samba-dcerpcd is executed on the
67 command line of a shell.
68 -i|--interactive
70 If this parameter is specified it causes the server to run
71 "interactively", not as a daemon, even if the server is executed on
72 the command line of a shell. Setting this parameter negates the
73 implicit daemon mode when run from the command line. samba-dcerpcd
74 will only accept one connection and terminate. It will also log to
75 standard output, as if the -S parameter had been given.
76 -F|--foreground
78 If specified, this parameter causes the main samba-dcerpcd process
79 to not daemonize, i.e. double-fork and disassociate with the
80 terminal. Child processes are still spawned as normal to service
81 each connection request, but the main process does not exit. This
82 operation mode is suitable for running samba-dcerpcd under process
83 supervisors such as supervise and svscan from Daniel J. Bernstein's
84 daemontools package, or the AIX process monitor.
85 --no-process-group
87 Do not create a new process group for samba-dcerpcd.
88 --libexec-rpcds
90 Offer RPC services for all daemons in Samba's LIBEXECDIR, all
91 programs starting with "rpcd_" are assumed to offer RPC services.
92 If you don't use the --libexec-rpcds option, you can explicitly
93 list all RPC service helpers explicitly on the command line.
94 --np-helper
96 Run samba-dcerpcd on demand opening named pipe sockets as helpers
97 for smbd or winbind. In order to run in this mode, the global
98 smb.conf option rpc start on demand helpers = true must be set to
99 true (this is the default setting).
100 --ready-signal-fd=<fd>
102 Report service readiness via this fd to smbd. Only for internal
103 use.
104
106 The original Samba software and related utilities were created by
107 Andrew Tridgell. Samba is now developed by the Samba Team as an Open
108 Source project similar to the way the Linux kernel is developed.
109Samba 4.16.2 06/13/2022 SAMBA-DCERPCD(8)