X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.service.xml;h=8977873c1ebd81c4f824defbafc7e00c59cb457d;hp=11f6006636aab2e99f2f6c102379196112a62711;hb=cb96a2c69a312fb089fef4501650f4fc40a1420b;hpb=16dad32e437fdf2ffca03cc60a083d84bd31886f diff --git a/man/systemd.service.xml b/man/systemd.service.xml index 11f600663..8977873c1 100644 --- a/man/systemd.service.xml +++ b/man/systemd.service.xml @@ -48,7 +48,7 @@ - systemd.service + service.service @@ -100,7 +100,7 @@ script. This is useful for compatibility with SysV. Note that this compatibility is quite comprehensive but not 100%. For details about the - incomptibilities see the Incompatibilities with SysV document. @@ -121,7 +121,7 @@ options specific to the [Service] section of service units are the following: - + Type= @@ -219,7 +219,7 @@ Behavior of is very similar to , however - actual execution of a the service + actual execution of the service binary is delayed until all jobs are dispatched. This may be used to avoid interleaving of output of shell @@ -245,7 +245,7 @@ Takes a boolean value that specifies whether systemd should try to guess the main PID of a service - should if it cannot be determined + if it cannot be determined reliably. This option is ignored unless is set and @@ -283,7 +283,7 @@ BusName= Takes a D-Bus bus - name, where this service is reachable + name, that this service is reachable as. This option is mandatory for services where Type= is set to @@ -296,52 +296,58 @@ ExecStart= - Takes a command line - that is executed when this service - shall be started up. The first token - of the command line must be an - absolute file name, then followed by - arguments for the process. It is - mandatory to set this option for all - services. This option may not be - specified more than once, except when - Type=oneshot is - used in which case more than one - ExecStart= line is - accepted which are then invoked one by - one, sequentially in the order they - appear in the unit file. + Commands with their + arguments that are executed when this + service is started. The first + argument must be an absolute path + name. - Optionally, if the absolute file - name is prefixed with - @, the second token - will be passed as - argv[0] to the - executed process, followed by the - further arguments specified. If the - first token is prefixed with - - an exit code of - the command normally considered a - failure (i.e. non-zero exit status or - abnormal exit due to signal) is ignored - and considered success. If both - - and - @ are used for the - same command the former must precede - the latter. Unless + When + Type=oneshot is + used, more than one command may be + specified. Multiple command lines may + be concatenated in a single directive, + by separating them with semicolons + (these semicolons must be passed as + separate words). Alternatively, this + directive may be specified more than + once with the same effect. However, + the latter syntax is not recommended + for compatibility with parsers + suitable for XDG + .desktop files. + The commands are invoked one by one + sequentially in the order they appear + in the unit file. When + Type is not + , only one + command may be given. Lone semicolons + may be escaped as + '\;'. If the empty + string is assigned to this option the + list of commands to start is reset, + prior assignments of this option will + have no effect. + + Unless Type=forking is set, the process started via this command line will be considered the - main process of the daemon. The - command line accepts % specifiers as + main process of the daemon. + + The command line accepts + '%' specifiers as described in - systemd.unit5. + systemd.unit5. Note + that the first argument of the command + line (i.e. the program to execute) may + not include specifiers. On top of that basic environment variable substitution is supported. Use ${FOO} as part of a - word, or as word of its own on the + word, or as a word of its own on the command line, in which case it will be replaced by the value of the environment variable including all @@ -354,10 +360,27 @@ at whitespace, resulting in no or more arguments. Note that the first argument (i.e. the program to execute) - may not be a variable, and must be a - literal and absolute path + may not be a variable, since it must + be a literal and absolute path name. + Optionally, if the absolute file + name is prefixed with + '@', the second token + will be passed as + argv[0] to the + executed process, followed by the + further arguments specified. If the + absolute file name is prefixed with + '-' an exit code of + the command normally considered a + failure (i.e. non-zero exit status or + abnormal exit due to signal) is ignored + and considered success. If both + '-' and + '@' are used they + can appear in either order. + Note that this setting does not directly support shell command lines. If shell command lines are to @@ -365,6 +388,13 @@ explicitly to a shell implementation of some kind. Example: ExecStart=/bin/sh -c 'dmesg | tac' + + For services run by a user + instance of systemd the special + environment variable + MANAGERPID is set + to the PID of the systemd + instance. @@ -374,24 +404,13 @@ Additional commands that are executed before or after the command in - ExecStart=, respectively. Multiple - command lines may be concatenated in a - single directive, by separating them - by semicolons (these semicolons must - be passed as separate words). In that - case, the commands are executed one - after the other, - serially. Alternatively, these - directives may be specified more than - once with the same effect. However, - the latter syntax is not recommended - for compatibility with parsers - suitable for XDG - .desktop files. - Use of these settings is - optional. Specifier and environment - variable substitution is - supported. + ExecStart=, respectively. + Syntax is the same as for + ExecStart=, except + that multiple command lines are allowed + and the commands are executed one + after the other, serially. + @@ -400,19 +419,19 @@ trigger a configuration reload in the service. This argument takes multiple command lines, following the same - scheme as pointed out for - ExecStartPre= + scheme as described for + ExecStart= above. Use of this setting is optional. Specifier and environment variable substitution is supported here following the same scheme as for ExecStart=. One - special environment variable is set: - if known $MAINPID is - set to the main process of the - daemon, and may be used for command - lines like the following: - /bin/kill -HUP + additional special environment + variables is set: if known + $MAINPID is set to + the main process of the daemon, and + may be used for command lines like the + following: /bin/kill -HUP $MAINPID. @@ -422,9 +441,8 @@ stop the service started via ExecStart=. This argument takes multiple command lines, - following the same scheme as pointed - out for - ExecStartPre= + following the same scheme as described + for ExecStart= above. Use of this setting is optional. All processes remaining for a service after the commands @@ -450,9 +468,8 @@ configured in ExecStop=. This argument takes multiple command lines, - following the same scheme as pointed - out for - ExecStartPre. Use + following the same scheme as described + for ExecStart. Use of these settings is optional. Specifier and environment variable substitution is @@ -571,7 +588,7 @@ 0. If set to it will be restarted only when it exited with an - exit code not equalling 0, when + exit code not equaling 0, when terminated by a signal (including on core dump), when an operation (such as service reload) times out or when the @@ -604,8 +621,14 @@ SIGKILL", ensures that exit codes 1, 2, 8 and the termination signal SIGKILL are considered clean - service - terminations. + service terminations. This option may + appear more than once in which case + the list of successful exit statuses + is merged. If the empty string is + assigned to this option the list is + reset, all prior assignments of this + option will have no + effect. @@ -626,9 +649,16 @@ logic. Example: "RestartPreventExitStatus=1 6 SIGABRT", ensures that exit - codes 1 and 6 and the termination signal - SIGABRT will not result in automatic - service restarting. + codes 1 and 6 and the termination + signal SIGABRT will not result in + automatic service restarting. This + option may appear more than once in + which case the list of restart preventing + statuses is merged. If the empty + string is assigned to this option the + list is reset, all prior assignments + of this option will have no + effect. @@ -716,7 +746,7 @@ open access to the notification socket when using Type=notify or - WatchdogUsec= (see + WatchdogSec= (see above). If those options are used but NotifyAccess= not configured it will be implicitly set @@ -742,13 +772,22 @@ same time. Also note that a different service may be activated on incoming traffic than inherits the sockets. Or - in other words: The + in other words: the Service= setting of .socket units - doesn't have to match the inverse of the - Sockets= setting of - the .service it - refers to. + doesn't have to match the inverse of + the Sockets= + setting of the + .service it + refers to. + + This option may appear more than + once, in which case the list of socket + units is merged. If the empty string + is assigned to this option the list of + sockets is reset, all prior uses of + this setting will have no + effect. @@ -849,7 +888,7 @@ for compatibility reasons and should not be used in newly written service files. - + SysVStartPriority= Set the SysV start @@ -910,7 +949,8 @@ systemctl8, systemd.unit5, systemd.exec5, - systemd.kill5 + systemd.kill5, + systemd.directives7