sd_bus_set_address(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | HISTORY | SEE ALSO | COLOPHON

SD_BUS_SET_ADDRESS(3)      sd_bus_set_address      SD_BUS_SET_ADDRESS(3)

NAME         top

       sd_bus_set_address, sd_bus_get_address, sd_bus_set_exec - Set or
       query the address of the bus connection

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       int sd_bus_set_address(sd_bus *bus, const char *address);

       int sd_bus_get_address(sd_bus *bus, const char **address);

       int sd_bus_set_exec(sd_bus *bus, const char *path,
                           char *const *argv);

DESCRIPTION         top

       sd_bus_set_address() configures a list of addresses of bus
       brokers to try to connect to from a subsequent sd_bus_start(3)
       call. The argument is a ";"-separated list of addresses to try.
       Each item must be one of the following:

       •   A unix socket address specified as "unix:guid=guid,path=path"
           or "unix:guid=guid,abstract=path". Exactly one of the path=
           and abstract= keys must be present, while guid= is optional.

       •   A TCP socket address specified as
           "tcp:[guid=guid,][host=host][,port=port][,family=family]".
           One or both of the host= and port= keys must be present,
           while the rest is optional.  family may be either ipv4 or
           ipv6.

       •   An executable to spawn specified as
           "unixexec:guid=guid,path=path,argv1=argument,argv2=argument,...".
           The path= key must be present, while guid= is optional.

       •   A machine (container) to connect to specified as
           "x-machine-unix:guid=guid,machine=machine,pid=pid". Exactly
           one of the machine= and pid= keys must be present, while
           guid= is optional.  machine is the name of a local container.
           See machinectl(1) for more information about the "machine"
           concept.  "machine=.host" may be used to specify the host
           machine. A connection to the standard system bus socket
           inside of the specified machine will be created.

       In all cases, parameter guid is an identifier of the remote peer,
       in the syntax accepted by sd_id128_from_string(3). If specified,
       the identifier returned by the peer after the connection is
       established will be checked and the connection will be rejected
       in case of a mismatch.

       Note that the addresses passed to sd_bus_set_address() may not be
       verified immediately. If they are invalid, an error may be
       returned e.g. from a subsequent call to sd_bus_start(3).

       sd_bus_get_address() returns any previously set addresses. In
       addition to being explicitly set by sd_bus_set_address(), the
       address will also be set automatically by sd_bus_open(3) and
       similar calls, based on environment variables or built-in
       defaults.

       sd_bus_set_exec() is a shorthand function for setting a
       "unixexec" address that spawns the given executable with the
       given arguments. If argv is NULL, the given executable is spawned
       without any extra arguments.

RETURN VALUE         top

       On success, these functions return a non-negative integer. On
       failure, they return a negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           The input parameters bus or address are NULL.

           Added in version 246.

       -ENOPKG
           The bus object bus could not be resolved.

           Added in version 246.

       -EPERM
           The input parameter bus is in a wrong state
           (sd_bus_set_address() may only be called once on a
           newly-created bus object).

           Added in version 246.

       -ECHILD
           The bus object bus was created in a different process.

           Added in version 246.

       -ENODATA
           The bus object bus has no address configured.

           Added in version 246.

NOTES         top

       Functions described here are available as a shared library, which
       can be compiled against and linked to with the
       libsystemd pkg-config(1) file.

       The code described here uses getenv(3), which is declared to be
       not multi-thread-safe. This means that the code calling the
       functions described here must not call setenv(3) from a parallel
       thread. It is recommended to only do calls to setenv() from an
       early phase of the program when no other threads have been
       started.

HISTORY         top

       sd_bus_set_address(), sd_bus_get_address(), and sd_bus_set_exec()
       were added in version 246.

SEE ALSO         top

       systemd(1), sd-bus(3), sd_bus_new(3), sd_bus_start(3),
       systemd-machined.service(8), machinectl(1)

COLOPHON         top

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
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       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 255                                        SD_BUS_SET_ADDRESS(3)

Pages that refer to this page: systemd-stdio-bridge(1)sd-bus(3)sd_bus_default(3)sd_bus_new(3)sd_bus_set_server(3)sd_bus_start(3)systemd.directives(7)systemd.index(7)