185 lines
6.7 KiB
Plaintext
185 lines
6.7 KiB
Plaintext
(* Intefraces module for Augeas
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Author: Free Ekanayaka <free@64studio.com>
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Reference: man dhclient.conf
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The only difference with the reference syntax is that this lens assumes
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that statements end with a new line, while the reference syntax allows
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new statements to be started right after the trailing ";" of the
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previous statement. This should not be a problem in real-life
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configuration files as statements get usually split across several
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lines, rather than merged in a single one.
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*)
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module Dhclient =
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autoload xfm
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(************************************************************************
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* USEFUL PRIMITIVES
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*************************************************************************)
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let eol = Util.eol
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let comment = Util.comment
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let comment_or_eol = Util.comment_or_eol
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let empty = Util.empty
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(* Define separators *)
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let sep_spc = del /[ \t\n]+/ " "
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let sep_scl = del /[ \t]*;/ ";"
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let sep_obr = del /[ \t\n]*\{\n]*/ " {\n"
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let sep_cbr = del /[ \t\n]*\}/ " }"
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let sep_com = del /[ \t\n]*,[ \t\n]*/ ","
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let sep_slh = del "\/" "/"
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let sep_col = del ":" ":"
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let sep_eq = del /[ \t]*=[ \t]*/ "="
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(* Define basic types *)
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let word = /[A-Za-z0-9_.-]+(\[[0-9]+\])?/
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(* Define fields *)
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(* TODO: there could be a " " in the middle of a value ... *)
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let sto_to_spc = store /[^\\#,;{}" \t\n]+|"[^\\#"\n]+"/
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let sto_to_spc_noeval = store /[^=\\#,;{}" \t\n]|[^=\\#,;{}" \t\n][^\\#,;{}" \t\n]*|"[^\\#"\n]+"/
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let sto_to_scl = store /[^ \t\n][^;\n]+[^ \t]|[^ \t;\n]+/
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let rfc_code = [ key "code" . sep_spc . store word ]
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. sep_eq
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. [ label "value" . sto_to_scl ]
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let eval = [ label "#eval" . Sep.equal . sep_spc . sto_to_scl ]
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let sto_number = store /[0-9][0-9]*/
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(************************************************************************
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* SIMPLE STATEMENTS
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*************************************************************************)
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let stmt_simple_re = "timeout"
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| "retry"
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| "select-timeout"
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| "reboot"
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| "backoff-cutoff"
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| "initial-interval"
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| "do-forward-updates"
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| "reject"
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let stmt_simple = [ key stmt_simple_re
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. sep_spc
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. sto_to_spc
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. sep_scl
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. comment_or_eol ]
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(************************************************************************
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* ARRAY STATEMENTS
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*************************************************************************)
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(* TODO: the array could also be empty, like in the request statement *)
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let stmt_array_re = "media"
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| "request"
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| "require"
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let stmt_array = [ key stmt_array_re
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. sep_spc
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. counter "stmt_array"
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. [ seq "stmt_array" . sto_to_spc ]
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. [ sep_com . seq "stmt_array" . sto_to_spc ]*
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. sep_scl . comment_or_eol ]
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(************************************************************************
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* HASH STATEMENTS
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*************************************************************************)
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let stmt_hash_re = "send"
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| "option"
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let stmt_args = ( [ key word . sep_spc . sto_to_spc_noeval ]
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| [ key word . sep_spc . (rfc_code|eval) ] )
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. sep_scl
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. comment_or_eol
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let stmt_hash = [ key stmt_hash_re
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. sep_spc
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. stmt_args ]
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let stmt_opt_mod_re = "append"
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| "prepend"
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| "default"
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| "supersede"
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let stmt_opt_mod = [ key stmt_opt_mod_re
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. sep_spc
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. stmt_args ]
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(************************************************************************
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* BLOCK STATEMENTS
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*************************************************************************)
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let stmt_block_re = "interface"
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| "lease"
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| "alias"
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let stmt_block_opt_re = "interface"
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| "script"
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| "bootp"
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| "fixed-address"
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| "filename"
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| "server-name"
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| "medium"
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| "vendor option space"
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(* TODO: some options could take no argument like bootp *)
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let stmt_block_opt = [ key stmt_block_opt_re
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. sep_spc
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. sto_to_spc
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. sep_scl
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. comment_or_eol ]
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let stmt_block_date_re
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= "renew"
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| "rebind"
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| "expire"
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let stmt_block_date = [ key stmt_block_date_re
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. [ sep_spc . label "weekday" . sto_number ]
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. [ sep_spc . label "year" . sto_number ]
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. [ sep_slh . label "month" . sto_number ]
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. [ sep_slh . label "day" . sto_number ]
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. [ sep_spc . label "hour" . sto_number ]
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. [ sep_col . label "minute" . sto_number ]
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. [ sep_col . label "second" . sto_number ]
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. sep_scl
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. comment_or_eol ]
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let stmt_block_arg = sep_spc . sto_to_spc
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let stmt_block_entry = sep_spc
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. ( stmt_array
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| stmt_hash
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| stmt_opt_mod
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| stmt_block_opt
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| stmt_block_date )
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let stmt_block = [ key stmt_block_re
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. stmt_block_arg?
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. sep_obr
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. stmt_block_entry+
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. sep_cbr
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. comment_or_eol ]
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(************************************************************************
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* LENS & FILTER
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*************************************************************************)
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let statement = (stmt_simple|stmt_opt_mod|stmt_array|stmt_hash|stmt_block)
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let lns = ( empty
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| comment
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| statement )*
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let filter = incl "/etc/dhcp3/dhclient.conf"
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. incl "/etc/dhcp/dhclient.conf"
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. incl "/etc/dhclient.conf"
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let xfm = transform lns filter
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