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SD_BUS_MESSAGE_REWIND(3) sd_bus_message_rewind SD_BUS_MESSAGE_REWIND(3)

NAME

sd_bus_message_rewind - Return to beginning of message or current container

SYNOPSIS

#include <elogind/sd-bus.h>

int sd_bus_message_rewind(sd_bus_message *m, int complete);

DESCRIPTION

sd_bus_message_rewind() moves the "read pointer" in the message m to either the beginning of the message (if complete is true) or to the beginning of the currently open container. If no container is open, complete has no effect.

RETURN VALUE

On success, this function returns 0 or a positive integer. The value is zero if the current container or whole message in case no container is open is empty, and positive otherwise. On failure, it returns a negative errno-style error code.

Errors

Returned errors may indicate the following problems:

-EINVAL

The m parameter is NULL.

-EPERM

The message m has not been sealed.

NOTES

Functions described here are available as a shared library, which can be compiled against and linked to with the libelogind pkg-config(8) file.

HISTORY

sd_bus_message_rewind() was added in version 240.

SEE ALSO

elogind(8), sd-bus(3), sd_bus_message_read(3)

elogind 255