Provided by: libsystemd-dev_251.4-1ubuntu7_amd64 bug


       sd_hwdb_new, sd_hwdb_new_from_path, sd_hwdb_ref, sd_hwdb_unref - Create a new hwdb object
       and create or destroy references to it


       #include <systemd/sd-hwdb.h>

       int sd_hwdb_new(sd_hwdb **hwdb);

       int sd_hwdb_new_from_path(const char *path, sd_hwdb **hwdb);

       sd_hwdb* sd_hwdb_ref(sd_hwdb *hwdb);

       sd_hwdb* sd_hwdb_unref(sd_hwdb *hwdb);


       sd_hwdb_new() creates a new hwdb object to access the binary hwdb database. Upon
       initialization, the file containing the binary representation of the hardware database is
       located and opened. The new object is returned in hwdb.

       sd_hwdb_new_from_path() may be used to specify the path from which the binary hardware
       database should be opened.

       The hwdb object is reference counted.  sd_hwdb_ref() and sd_hwdb_unref() may be used to
       get a new reference or destroy an existing reference to an object. The caller must dispose
       of the reference acquired with sd_hwdb_new() by calling sd_hwdb_unref() when done with the

       Use sd_hwdb_seek(3), sd_hwdb_get(3), and sd_hwdb_enumerate(3) to access entries.


       On success, sd_hwdb_new() and sd_hwdb_new_from_path() return a non-negative integer. On
       failure, a negative errno-style error code is returned.

       sd_hwdb_ref() always returns the argument.

       sd_hwdb_unref() always returns NULL.

       Returned errors may indicate the following problems:

           The binary hardware database file could not be located. See systemd-hwdb(8) for more

           The located binary hardware database file is in an incompatible format.

           Memory allocation failed.


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


       systemd(1), systemd-udevd.service(8), sd-hwdb(3), systemd-hwdb(3)