sd_bus_set_exec(3) — Linux manual page

NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | 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.

       -ENOPKG
           The bus object bus could not be resolved.

       -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).

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

       -ENODATA
           The bus object bus has no address configured.

NOTES         top

       These APIs are implemented as a shared library, which can be compiled
       and linked to with the libsystemd pkg-config(1) file.

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 2020-08-13.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-08-11.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

systemd 246                                            SD_BUS_SET_ADDRESS(3)

Pages that refer to this page: sd_bus_start(3)30-systemd-environment-d-generator(7)systemd.index(7)