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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | NOTES | SEE ALSO | COLOPHON |
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SD_BUS_M...IFY_TYPE(3) sd_bus_message_verify_type SD_BUS_M...IFY_TYPE(3)
sd_bus_message_verify_type - Check if the message has specified
type at the current location
#include <systemd/sd-bus.h>
int sd_bus_message_verify_type(sd_bus_message *m, char type,
const char* contents);
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.
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.
Errors
Returned errors may indicate the following problems:
-EINVAL
m or both type and contents are NULL.
Arguments do not satisfy other constraints listed above.
-EPERM
Message m is not sealed.
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.
systemd(1), sd-bus(3), sd_bus_message_append(3)
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 2024-06-14. (At that
time, the date of the most recent commit that was found in the
repository was 2024-06-13.) 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
[email protected]
systemd 257~devel SD_BUS_M...IFY_TYPE(3)
Pages that refer to this page: sd-bus(3), systemd.directives(7), systemd.index(7)
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HTML rendering created 2024-06-26 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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