In Cargo.toml:
[dependencies]
systemd = "0.10"By default, libsystemd-sys will use pkg-config to find libsystemd. It
defaults to using the libsystemd package. To change the package looked up in
pkg-config, set the SYSTEMD_PKG_NAME environment variable.
If you want to override the source of the libsystemd directly, set the env
var SYSTEMD_LIB_DIR to a path which contains the libsystemd to link
against. Optionally, you may also set SYSTEMD_LIBS to indicate which
libraries to link against. Libraries in the variable SYSTEMD_LIBS are colon
(:) separated and may include a KIND. For example:
SYSTEMD_LIBS="static=foo:bar".
Either set SYSTEMD_PKG_NAME=libelogind (name of the pkg-config file) or set
both SYSTEMD_LIBS=elogind and set SYSTEMD_LIB_DIR to the appropriate
directory.
When using elogind, the apis needed for journal and bus features may not be completely
available (elogind forked from an older version of systemd that may lack some
of these APIs). If your application does not need these features, depend on
systemd without the default features to allow maximum compatibility:
[dependencies]
systemd = { version = "0.10", default-features = false }Note that there still may be some missing symbols. If you discover a link
error, report it so that we can tweak the systemd crate to support it.
Journal sending is supported, and systemd::journal::Journal is a (low functionality) wrapper around the read API.
An example of the journal writing api:
use log::warn;
use systemd::{journal, sd_journal_log};
fn main() {
journal::print(1, &format!("Rust can talk to the journal: {:?}", 4));
journal::send(&["CODE_FILE=HI", "CODE_LINE=1213", "CODE_FUNCTION=LIES"]);
journal::JournalLog::init().unwrap();
warn!("HI");
sd_journal_log!(4, "HI {:?}", 2);
}The daemon API mostly offers tools for working with raw filehandles passed to the process by systemd on socket activation. Since raw filehandles are not well supported in Rust, it's likely these functions will mostly be helpful in managing program flow; actual socket code will have to use the libc crate.
This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version.
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