1SD_BUS_MESSAGE_REWIND(3)     sd_bus_message_rewind    SD_BUS_MESSAGE_REWIND(3)
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NAME

6       sd_bus_message_rewind - Return to beginning of message or current
7       container
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SYNOPSIS

10       #include <systemd/sd-bus.h>
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12       int sd_bus_message_rewind(sd_bus_message *m, int complete);
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DESCRIPTION

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

21       On success, this function returns 0 or a positive integer. The value is
22       zero if the current container or whole message in case no container is
23       open is empty, and positive otherwise. On failure, it returns a
24       negative errno-style error code.
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26   Errors
27       Returned errors may indicate the following problems:
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29       -EINVAL
30           The m parameter is NULL.
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32       -EPERM
33           The message m has not been sealed.
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NOTES

36       Functions described here are available as a shared library, which can
37       be compiled against and linked to with the libsystemd pkg-config(1)
38       file.
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40       The code described here uses getenv(3), which is declared to be not
41       multi-thread-safe. This means that the code calling the functions
42       described here must not call setenv(3) from a parallel thread. It is
43       recommended to only do calls to setenv() from an early phase of the
44       program when no other threads have been started.
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SEE ALSO

47       systemd(1), sd-bus(3), sd_bus_message_read(3)
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51systemd 254                                           SD_BUS_MESSAGE_REWIND(3)
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