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systemd.aug
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(* Module: Systemd Parses systemd unit files. Author: Dominic Cleal <dcleal@redhat.com> About: Reference This lens tries to keep as close as possible to systemd.unit(5) and systemd.service(5) etc where possible. About: License This file is licenced under the LGPL v2+, like the rest of Augeas. About: Lens Usage To be documented About: Configuration files This lens applies to /lib/systemd/system/* and /etc/systemd/system/*. See <filter>. *) module Systemd = autoload xfm (************************************************************************ * Group: USEFUL PRIMITIVES *************************************************************************) (* View: eol *) let eol = Util.eol (* View: eol_comment An <IniFile.comment> entry for standalone comment lines (; or #) *) let comment = IniFile.comment IniFile.comment_re "#" (* View: eol_comment An <IniFile.comment> entry for end of line comments (# only) *) let eol_comment = IniFile.comment "#" "#" (* View: sep An <IniFile.sep> entry *) let sep = IniFile.sep "=" "=" (* Variable: entry_single_kw *) let entry_single_kw = "Description" (* Variable: entry_command_kw *) let entry_command_kw = /Exec[A-Za-z][A-Za-z0-9._-]+/ (* Variable: entry_env_kw *) let entry_env_kw = "Environment" (* Variable: entry_multi_kw *) let entry_multi_kw = let forbidden = entry_single_kw | entry_command_kw | entry_env_kw in /[A-Za-z][A-Za-z0-9._-]+/ - forbidden (* Variable: value_single_re *) let value_single_re = /[^# \t\n\\][^#\n\\]*[^# \t\n\\]|[^# \t\n\\]/ (* View: sto_value_single Support multiline values with a backslash *) let sto_value_single = Util.del_opt_ws "" . store (value_single_re . (/\\\\\n/ . value_single_re)*) (* View: sto_value *) let sto_value = store /[^# \t\n]*[^# \t\n\\]/ (* Variable: value_sep Multi-value entries separated by whitespace or backslash and newline *) let value_sep = del /[ \t]+|[ \t]*\\\\[ \t]*\n[ \t]*/ " " (* Variable: value_cmd_re Don't parse @ and - prefix flags *) let value_cmd_re = /[^#@ \t\n\\-][^#@ \t\n\\-][^# \t\n\\]*/ (* Variable: env_key *) let env_key = /[A-Za-z0-9_]+(\[[0-9]+\])?/ (************************************************************************ * Group: ENTRIES *************************************************************************) (* Supported entry features, selected by key names: * multi-value space separated attrs (the default) * single-value attrs (Description) * systemd.service: Exec* attrs with flags, command and arguments * systemd.service: Environment NAME=arg *) (* View: entry_fn Prototype for our various key=value lines, with optional comment *) let entry_fn (kw:regexp) (val:lens) = [ key kw . sep . val . (eol_comment|eol) ] (* View: entry_value Store a value that doesn't contain spaces *) let entry_value = [ label "value" . sto_value ] (* View: entry_single Entry that takes a single value containing spaces *) let entry_single = entry_fn entry_single_kw [ label "value" . sto_value_single ]? (* View: entry_command Entry that takes a space separated set of values (the default) *) let entry_multi = entry_fn entry_multi_kw ( Util.del_opt_ws "" . Build.opt_list entry_value value_sep )? (* View: entry_command_flags Exec* flags "@" and "-". Order is important, see systemd.service(8) *) let entry_command_flags = let exit = [ label "ignoreexit" . Util.del_str "-" ] in let arg0 = [ label "arg0" . Util.del_str "@" ] in exit? . arg0? (* View: entry_command Entry that takes a command, arguments and the optional prefix flags *) let entry_command = let cmd = [ label "command" . store value_cmd_re ] in let arg = [ seq "args" . sto_value ] in let args = [ counter "args" . label "arguments" . (value_sep . arg)+ ] in entry_fn entry_command_kw ( entry_command_flags . cmd . args? )? (* View: entry_env Entry that takes a space separated set of ENV=value key/value pairs *) let entry_env = let envkv (env_val:lens) = key env_key . Util.del_str "=" . env_val (* bare has no spaces, and is optionally quoted *) in let bare = Quote.do_quote_opt (envkv (store /[^#'" \t\n]*[^#'" \t\n\\]/)?) in let bare_dqval = envkv (store /"[^#" \t\n]*[^#" \t\n\\]"/) in let bare_sqval = envkv (store /'[^#' \t\n]*[^#' \t\n\\]'/) (* quoted has at least one space, and must be quoted *) in let quoted = Quote.do_quote (envkv (store /[^#"'\n]*[ \t]+[^#"'\n]*/)) in let envkv_quoted = [ bare ] | [ bare_dqval ] | [ bare_sqval ] | [ quoted ] in entry_fn entry_env_kw ( Build.opt_list envkv_quoted value_sep ) (************************************************************************ * Group: LENS *************************************************************************) (* View: entry An <IniFile.entry> *) let entry = entry_single | entry_multi | entry_command | entry_env | comment (* View: include Includes another file at this position *) let include = [ key ".include" . Util.del_ws_spc . sto_value . (eol_comment|eol) ] (* View: title An <IniFile.title> *) let title = IniFile.title IniFile.record_re (* View: record An <IniFile.record> *) let record = IniFile.record title (entry|include) (* View: lns An <IniFile.lns> *) let lns = IniFile.lns record (comment|include) (* View: filter *) let filter = incl "/lib/systemd/system/*" . incl "/lib/systemd/system/*/*" . incl "/etc/systemd/system/*" . incl "/etc/systemd/system/*/*" . incl "/etc/systemd/logind.conf" . incl "/etc/sysconfig/*.systemd" . excl "/lib/systemd/system/*.d" . excl "/etc/systemd/system/*.d" . excl "/lib/systemd/system/*.wants" . excl "/etc/systemd/system/*.wants" . Util.stdexcl let xfm = transform lns filter