sd_bus_get_name_machine_id(3) — Linux manual page

SD_BUS_G...CHINE_ID(3) sd_bus_get_name_machine_id SD_BUS_G...CHINE_ID(3)

NAME         top

       sd_bus_get_name_machine_id - Retrieve a bus client's machine
       identity

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       int sd_bus_get_name_machine_id(sd_bus *bus, const char *name,
                                      sd_id128_t *machine);

DESCRIPTION         top

       sd_bus_get_name_machine_id() retrieves the D-Bus machine identity
       of the machine that the bus client identified by name is running
       on. Internally, it calls the GetMachineId method of the
       org.freedesktop.DBus.Peer interface. The D-Bus machine identity
       is a 128-bit UUID. On Linux systems running systemd, this
       corresponds to the contents of /etc/machine-id. On success, the
       machine identity is stored in machine.

RETURN VALUE         top

       On success, this function returns a non-negative integer. On
       failure, it returns a negative errno-style error code.

   Errors
       Returned errors may indicate the following problems:

       -EINVAL
           An argument is invalid.

           Added in version 246.

       -ENOPKG
           The bus cannot be resolved.

           Added in version 246.

       -ECHILD
           The bus was created in a different process, library or module
           instance.

           Added in version 246.

       -ENOMEM
           Memory allocation failed.

           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_get_name_machine_id() was added in version 246.

SEE ALSO         top

       systemd(1), sd-bus(3)

COLOPHON         top

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systemd 255                                       SD_BUS_G...CHINE_ID(3)

Pages that refer to this page: sd-bus(3),  systemd.directives(7),  systemd.index(7)

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