sd_bus_message_verify_type(3) — Linux manual page


SD_BUS_M...IFY_TYPE(3) sd_bus_message_verify_type SD_BUS_M...IFY_TYPE(3)

NAME         top

       sd_bus_message_verify_type - Check if the message has specified
       type at the current location

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       int sd_bus_message_verify_type(sd_bus_message *m, char type,
                                      const char* contents);

DESCRIPTION         top

       sd_bus_message_verify_type() checks if the complete type at the
       current location in the message m matches the specified type and
       contents. If non-zero, parameter type must be one of the types
       specified in sd_bus_message_append(1). If non-null, parameter
       contents must be a valid sequence of complete types. If both type
       and contents are specified type must be a container type.

       If type is specified, the type in the message must match. If
       contents is specified, the type in the message must be a
       container type with this signature.

RETURN VALUE         top

       On success, this call returns true if the type matches and zero
       if not (the message m contains different data or the end of the
       message has been reached). On failure, it returns a negative
       errno-style error code.

       Returned errors may indicate the following problems:

           m or both type and contents are NULL.

           Arguments do not satisfy other constraints listed above.

           Message m is not sealed.

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

SEE ALSO         top

       systemd(1), sd-bus(3), sd_bus_message_append(3)

COLOPHON         top

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       This page was obtained from the project's upstream Git repository
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systemd 255                                       SD_BUS_M...IFY_TYPE(3)

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