X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=man%2Fsystemd.exec.xml;h=e9af4abd6d565797c3ebef271d91f9cf3d3b04f5;hp=cc5442d45cf17be9b0c29051533cbf2428a44403;hb=2134b5ef6b5c944036d051381f4bd7b7e61ef373;hpb=8d0e0ddda6501479eb69164687c83c1a7667b33a diff --git a/man/systemd.exec.xml b/man/systemd.exec.xml index cc5442d45..e9af4abd6 100644 --- a/man/systemd.exec.xml +++ b/man/systemd.exec.xml @@ -103,7 +103,7 @@ directory path. Sets the root directory for executed processes, with the - chroot2 + chroot2 system call. If this is used, it must be ensured that the process and all its auxiliary files are available in @@ -304,7 +304,7 @@ See - environ7 + environ7 for details about environment variables. @@ -365,39 +365,47 @@ , , or - . If - is selected, - standard input will be connected to + . + + If is + selected, standard input will be + connected to /dev/null, i.e. all read attempts by the process - will result in immediate EOF. If - is selected, - standard input is connected to a TTY - (as configured by + will result in immediate EOF. + + If is + selected, standard input is connected + to a TTY (as configured by TTYPath=, see below) and the executed process becomes the controlling process of the terminal. If the terminal is already - being controlled by another process, the - executed process waits until the current - controlling process releases the - terminal. - - is similar to , - but the executed process is forcefully - and immediately made the controlling + being controlled by another process, + the executed process waits until the + current controlling process releases + the terminal. + + is similar + to , but the + executed process is forcefully and + immediately made the controlling process of the terminal, potentially removing previous controlling processes from the - terminal. is + terminal. + + is similar to but if the terminal already has a controlling process start-up of the executed - process fails. The - option is only - valid in socket-activated services, - and only when the socket configuration - file (see + process fails. + + The + option is only valid in + socket-activated services, and only + when the socket configuration file + (see systemd.socket5 for details) specifies a single socket only. If this option is set, standard @@ -407,7 +415,9 @@ with daemons designed for use with the traditional inetd8 - daemon. This setting defaults to + daemon. + + This setting defaults to . @@ -418,56 +428,84 @@ of , , , + , , , - , + , , - , - or - . If set to - , the file - descriptor of standard input is - duplicated for standard output. If set - to , standard - output will be connected to + or + . + + + duplicates the file descriptor of + standard input for standard + output. + + connects + standard output to /dev/null, i.e. everything written to it will be - lost. If set to , - standard output will be connected to a - tty (as configured via + lost. + + connects + standard output to a tty (as + configured via TTYPath=, see below). If the TTY is used for output only, the executed process will not become the controlling process of the terminal, and will not fail or wait for other processes to release the - terminal. - connects standard output to the - syslog3 - system syslog - service. - connects it with the kernel log buffer - which is accessible via - dmesg1. - connects it with the journal which is - accessible via - journalctl1 - (Note that everything that is written - to syslog or kmsg is implicitly stored - in the journal as well, those options - are hence supersets of this - one). , - and - work - similarly but copy the output to the - system console as - well. connects - standard output to a socket from - socket activation, semantics are - similar to the respective option of - StandardInput=. - This setting defaults to the value set - with + terminal. + + + connects standard output with the + journal which is accessible via + journalctl1. + Note that everything that is written + to syslog or kmsg (see below) is + implicitly stored in the journal as + well, the specific two options listed + below are hence supersets of this + one. + + connects + standard output to the syslog3 + system syslog service, in addition to + the journal. Note that the journal + daemon is usually configured to + forward everything it receives to + syslog anyway, in which case this + option is no different from + . + + connects + standard output with the kernel log + buffer which is accessible via + dmesg1, + in addition to the journal. The + journal daemon might be configured to + send all logs to kmsg anyway, in which + case this option is no different from + . + + , + and + work in + a similar way as the three options + above but copy the output to the + system console as well. + + connects + standard output to a socket acquired + via socket activation. The semantics + are similar to the same option of + StandardInput=. + + This setting defaults to the + value set with in systemd-system.conf5, @@ -534,15 +572,19 @@ SyslogIdentifier= Sets the process name - to prefix log lines sent to syslog or - the kernel log buffer with. If not set, - defaults to the process name of the - executed process. This option is only - useful when + to prefix log lines sent to the + logging system or the kernel log + buffer with. If not set, defaults to + the process name of the executed + process. This option is only useful + when StandardOutput= or StandardError= are - set to or - . + set to , + or + (or to the same + settings in combination with + ). SyslogFacility= @@ -568,7 +610,7 @@ , or . See - syslog3 + syslog3 for details. This option is only useful when StandardOutput= or @@ -590,7 +632,7 @@ , , . See - syslog3 + syslog3 for details. This option is only useful when StandardOutput= or @@ -687,7 +729,7 @@ User= setting. If not set, no PAM session will be opened for the executed processes. See - pam8 + pam8 for details. @@ -698,7 +740,7 @@ capabilities to include in the capability bounding set for the executed process. See - capabilities7 + capabilities7 for details. Takes a whitespace-separated list of capability names as read by cap_from_name3, @@ -738,26 +780,28 @@ SecureBits= Controls the secure - bits set for the executed process. See - capabilities7 - for details. Takes a list of strings: + bits set for the executed process. + Takes a space-separated combination of + options from the following list: , , , , - and/or + , and . This option may appear more than once in - which case the secure bits are - ORed. If the empty string is assigned - to this option, the bits are reset to - 0. + which case the secure bits are ORed. + If the empty string is assigned to + this option, the bits are reset to 0. + See capabilities7 + for details. Capabilities= Controls the - capabilities7 + capabilities7 set for the executed process. Take a capability string describing the effective, permitted and inherited @@ -768,7 +812,7 @@ attached to the executed file. Due to that CapabilityBoundingSet= - is probably the much more useful + is probably a much more useful setting. @@ -975,7 +1019,7 @@ made inaccessible and empty for processes invoked by this unit. If set to read-only, the - two directores are made read-only + two directories are made read-only instead. It is recommended to enable this setting for all long-running services (in particular network-facing @@ -1021,14 +1065,14 @@ namespace. Note that means that file systems mounted on the host might stay - mounted continously in the unit's + mounted continuously in the unit's namespace, and thus keep the device busy. Note that the file system namespace related options (PrivateTmp=, PrivateDevices=, - ReadOnlySystem=, - ProtectedHome=, + ProtectSystem=, + ProtectHome=, ReadOnlyDirectories=, InaccessibleDirectories= and @@ -1472,7 +1516,7 @@ or StandardError=tty). See - termcap5. + termcap5. @@ -1488,14 +1532,14 @@ systemd.setenv= (see systemd1). Additional variables may also be set through PAM, - cf. pam_env8. + cf. pam_env8. See Also systemd1, - systemctl8, + systemctl1, journalctl8, systemd.unit5, systemd.service5, @@ -1506,7 +1550,7 @@ systemd.resource-control5, systemd.directives7, tmpfiles.d5, - exec3 + exec3