sd_bus_message_read_strv(3) — Linux manual page



NAME         top

       sd_bus_message_read_strv, sd_bus_message_read_strv_extend -
       Access an array of strings in a message

SYNOPSIS         top

       #include <systemd/sd-bus.h>

       int sd_bus_message_read_strv(sd_bus_message *m, char ***l);

       int sd_bus_message_read_strv_extend(sd_bus_message *m,
                                           char ***l);

DESCRIPTION         top

       sd_bus_message_read_strv() reads an array of string-like items
       from the message m. The "read pointer" in the message must be
       right before an array of strings (D-Bus type "as"), object paths
       (D-Bus type "ao"), or signatures (D-Bus type "ag"). On success, a
       pointer to a NULL-terminated array of strings (strv) is returned
       in the output parameter l. Note that ownership of this array is
       transferred to the caller. Hence, the caller is responsible for
       freeing this array and its contents.

       sd_bus_message_read_strv_extend() is similar, but the second
       parameter is an input-output parameter. If *l is NULL, if behaves
       identically to sd_bus_message_read_strv(). Otherwise, *l must
       point to a strv, which will be reallocated and extended with
       additional strings. This function is particularly useful when
       combining multiple lists of strings in a message or messages into
       a single array of strings.

RETURN VALUE         top

       On success, these functions return a non-negative integer. On
       failure, they return a negative errno-style error code.

       Returned errors may indicate the following problems:

           m or l are NULL.

           The message is not sealed.

           The message cannot be parsed.

           The message "read pointer" is not right before an array of
           the appropriate type.

SEE ALSO         top

       systemd(1), sd-bus(3), sd_bus_message_read(3)

COLOPHON         top

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       This page was obtained from the project's upstream Git repository
       ⟨⟩ on 2023-06-23.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-06-23.)  If you discover any rendering
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systemd 253                                  SD_BUS_MESSAGE_READ_STRV(3)

Pages that refer to this page: sd-bus(3)sd_bus_message_read_array(3)systemd.directives(7)systemd.index(7)