table of contents
| SD_BUS_MESSAGE_VERIFY_TYPE(3) | sd_bus_message_verify_type | SD_BUS_MESSAGE_VERIFY_TYPE(3) |
NAME¶
sd_bus_message_verify_type - Check if the message has specified type at the current location
SYNOPSIS¶
#include <systemd/sd-bus.h>
int sd_bus_message_verify_type(sd_bus_message *m, char type, const char* contents);
DESCRIPTION¶
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¶
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
Arguments do not satisfy other constraints listed above.
-EPERM
NOTES¶
These APIs are implemented as a shared library, which can be compiled and linked to with the libsystemd pkg-config(1) file.
SEE ALSO¶
| systemd 252 |