e96d6be763
This adds minimal hardware watchdog support to PID 1. The idea is that PID 1 supervises and watchdogs system services, while the hardware watchdog is used to supervise PID 1. This adds two hardware watchdog configuration options, for the runtime watchdog and for a shutdown watchdog. The former is active during normal operation, the latter only at reboots to ensure that if a clean reboot times out we reboot nonetheless. If the runtime watchdog is enabled PID 1 will automatically wake up at half the configured interval and write to the watchdog daemon. By default we enable the shutdown watchdog, but leave the runtime watchdog disabled in order not to break independent hardware watchdog daemons people might be using. This is only the most basic hookup. If necessary we can later on hook up the watchdog ping more closely with services deemed crucial. |
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m4 | ||
man | ||
po | ||
rules | ||
src | ||
sysctl.d | ||
test | ||
tmpfiles.d | ||
units | ||
.dir-locals.el | ||
.gitignore | ||
.mailmap | ||
.vimrc | ||
autogen.sh | ||
CODING_STYLE | ||
configure.ac | ||
DISTRO_PORTING | ||
introspect.awk | ||
LICENSE | ||
Makefile.am | ||
NEWS | ||
README | ||
TODO |
systemd System and Service Manager DETAILS: http://0pointer.de/blog/projects/systemd.html WEB SITE: http://www.freedesktop.org/wiki/Software/systemd GIT: git://anongit.freedesktop.org/systemd/systemd ssh://git.freedesktop.org/git/systemd/systemd GITWEB: http://cgit.freedesktop.org/systemd/systemd MAILING LIST: http://lists.freedesktop.org/mailman/listinfo/systemd-devel http://lists.freedesktop.org/mailman/listinfo/systemd-commits IRC: #systemd on irc.freenode.org BUG REPORTS: https://bugs.freedesktop.org/enter_bug.cgi?product=systemd AUTHOR: Lennart Poettering with major support from Kay Sievers LICENSE: GPLv2+ for all code, except sd-daemon.[ch] and sd-readahead.[ch] which are MIT REQUIREMENTS: Linux kernel >= 2.6.39 with devtmpfs with cgroups (but it's OK to disable all controllers) optional but strongly recommended: autofs4, ipv6 libudev >= 172 dbus >= 1.4.0 libcap PAM >= 1.1.2 (optional) libcryptsetup (optional) libaudit (optional) libselinux (optional) tcpwrappers (optional) When you build from git you need the following additional dependencies: docbook-xsl xsltproc automake autoconf libtool gperf make, gcc, and similar tools During runtime you need the following dependencies: util-linux > v2.18 (requires fsck -l, agetty -s) sulogin (from sysvinit-tools, optional but recommended) plymouth (optional) dracut (optional) When systemd-hostnamed is used it is strongly recommended to install nss-myhostname to ensure that in a world of dynamically changing hostnames the hostname stays resolveable under all circumstances. In fact, systemd-hostnamed will warn if nss-myhostname is not installed. Packagers are encouraged to add a dependency on nss-myhostname to the package that includes systemd-hostnamed. Note that D-Bus can link against libsystemd-login.so, which results in a cyclic build dependency. To accomodate for this please build D-Bus without systemd first, then build systemd, then rebuild D-Bus with systemd support. WARNINGS: systemd will warn you during boot if /etc/mtab is not a symlink to /proc/mounts. Please ensure that /etc/mtab is a proper symlink. systemd will warn you during boot if /usr is on a different file system than /. While in systemd itself very little will break if /usr is on a separate partition many of its dependencies very likely will break sooner or later in one form or another. For example udev rules tend to refer to binaries in /usr, binaries that link to libraries in /usr or binaries that refer to data files in /usr. Since these breakages are not always directly visible systemd will warn about this, since this kind of file system setup is not really supported anymore by the basic set of Linux OS components. For more information on this issue consult http://freedesktop.org/wiki/Software/systemd/separate-usr-is-broken ENGINEERING AND CONSULTING SERVICES: ProFUSION <http://profusion.mobi> offers professional engineering and consulting services for systemd for embedded and other use. Please contact Gustavo Barbieri <barbieri@profusion.mobi> for more information. Disclaimer: This notice is not a recommendation or official endorsement. However, ProFUSION's upstream work has been very beneficial for the systemd project.