X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.xml;h=47d6438939a12020142aa3db9ab86521f3f363ad;hp=c7aed3c6ff06b320cf44ddaa6c56d14ab5d5b626;hb=0b429ab7fca2aa139ffbeeac8bdcfbbd21cc1a60;hpb=6ed80a4e346883b99263a1a13505ef6afcbc09c3 diff --git a/man/systemd.xml b/man/systemd.xml index c7aed3c6f..47d643893 100644 --- a/man/systemd.xml +++ b/man/systemd.xml @@ -285,25 +285,27 @@ Concepts systemd provides a dependency system between - various entities called "units". Units encapsulate - various objects that are relevant for system boot-up - and maintenance. The majority of units are configured - in unit configuration files, whose syntax and basic - set of options is described in + various entities called "units" of 12 different + types. Units encapsulate various objects that are + relevant for system boot-up and maintenance. The + majority of units are configured in unit configuration + files, whose syntax and basic set of options is + described in systemd.unit5, however some are created automatically from other - configuration or dynamically from system state. Units - may be 'active' (meaning started, bound, plugged in, - ... depending on the unit type, see below), or - 'inactive' (meaning stopped, unbound, unplugged, ...), - as well as in the process of being activated or - deactivated, i.e. between the two states (these states - are called 'activating', 'deactivating'). A special - 'failed' state is available as well which is very - similar to 'inactive' and is entered when the service - failed in some way (process returned error code on - exit, or crashed, or an operation timed out). If this - state is entered the cause will be logged, for later + configuration, dynamically from system state or + programmatically at runtime. Units may be "active" + (meaning started, bound, plugged in, ..., depending on + the unit type, see below), or "inactive" (meaning + stopped, unbound, unplugged, ...), as well as in the + process of being activated or deactivated, + i.e. between the two states (these states are called + "activating", "deactivating"). A special "failed" + state is available as well, which is very similar to + "inactive" and is entered when the service failed in + some way (process returned error code on exit, or + crashed, or an operation timed out). If this state is + entered, the cause will be logged, for later reference. Note that the various unit types may have a number of additional substates, which are mapped to the five generalized unit states described @@ -312,7 +314,7 @@ The following unit types are available: - Service units, which control + Service units, which start and control daemons and the processes they consist of. For details see systemd.service5. @@ -369,6 +371,18 @@ objects change or are modified. See systemd.path5. + Slice units may be used to + group units which manage system processes + (such as service and scope units) in a + hierarchical tree for resource management + purposes. See + systemd.slice5. + + Scope units are similar to + service units, but manage foreign processes + instead of starting them as well. See + systemd.scope5. + Units are named as their configuration @@ -1008,7 +1022,7 @@ option prefixed with rd. is honored only in the initial RAM disk (initrd), - while the one that isn't prefixed only + while the one that is not prefixed only in the main system. @@ -1099,16 +1113,11 @@ systemd.setenv= Takes a string - argument in the form - VARIABLE=VALUE. May be used to set - environment variables for the init - process and all its children at boot - time. May be used more than once to - set multiple variables. If the equal - sign and variable are missing it unsets - an environment variable which might be - passed in from the initial ram - disk. + argument in the form VARIABLE=VALUE. + May be used to set default environment + variables to add to forked child processes. + May be used more than once to set multiple + variables.