sd_bus_message_append

Name

sd_bus_message_append_strv — Attach an array of strings to a message

Synopsis

#include <systemd/sd-bus.h>

`int sd_bus_message_append_strv(`	sd_bus_message *`m`,
	char **`l)`;

Description¶

The sd_bus_message_append() function can be used to append an array of strings to message m. The parameter l shall point to a NULL-terminated array of pointers to NUL-terminated strings. Each string must satisfy the same constraints as described for the "s" type in sd_bus_message_append_basic(3).

The memory pointed at by p and the contents of the strings themselves are copied into the memory area containing the message and may be changed after this call. Note that the signature of l parameter is to be treated as const char *const *, and the contents will not be modified.

Return Value¶

On success, this call returns 0 or a positive integer. On failure, a negative errno-style error code is returned.

Errors¶

Returned errors may indicate the following problems:

-EINVAL¶: Specified parameter is invalid.
-EPERM¶: Message has been sealed.
-ESTALE¶: Message is in invalid state.
-ENXIO¶: Message cannot be appended to.
-ENOMEM¶: Memory allocation failed.

Notes¶

Functions described here are available as a shared library, which can be compiled against and linked to with the libsystemd pkg-config(1) file.

All functions listed here are thread-agnostic and only a single thread may operate on a given object at any given time. Different threads may access the same object at different times. Multiple independent objects may be used from different threads in parallel.

The code described here uses getenv(3), which is declared to be not multi-thread-safe. This means that the code calling the functions described here must not call setenv(3) from a parallel thread. It is recommended to only do calls to setenv() from an early phase of the program when no other threads have been started.