|
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | SEE ALSO | NOTES | COLOPHON |
SD_BUS_MESSAGE_READ_BASIC(3)_bus_message_read_basicBUS_MESSAGE_READ_BASIC(3)
sd_bus_message_read_basic - Read a basic type from a message
#include <systemd/sd-bus.h>
int sd_bus_message_read_basic(sd_bus_message *m, char type, void *p);
sd_bus_message_read_basic() reads a basic type from a message and
advances the read position in the message. The set of basic types and
their ascii codes passed in type are described in the D-Bus
Specification[1].
If p is not NULL, it should contain a pointer to an appropriate
object. For example, if type is 'y', the object passed in p should
have type uint8_t *. If type is 's', the object passed in p should
have type const char **. Note that, if the basic type is a pointer
(e.g., const char * in the case of a string), the pointer is only
borrowed and the contents must be copied if they are to be used after
the end of the messages lifetime. Similarly, during the lifetime of
such a pointer, the message must not be modified.
If there is no object of the specified type at the current position
in the message, an error is returned.
On success, sd_bus_message_read_basic() returns 0 or a positive
integer. On failure, it returns a negative errno-style error code.
systemd(1), sd-bus(3),
1. D-Bus Specification
https://dbus.freedesktop.org/doc/dbus-specification.html
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 2017-07-05. If you dis‐
cover 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 man-pages@man7.org
systemd 234 SD_BUS_MESSAGE_READ_BASIC(3)
Pages that refer to this page: systemd.directives(7), systemd.index(7)