- pquis(fp, "\n\
-Grammar summary\n\
-\n\
-Basic syntax\n\
- file ::= empty | file stmt [`;']\n\
- stmt ::= option-stmt | fw-stmt\n\
- fw-stmt ::= `fw' source options [`to'|`->'] target options\n\
- options ::= `{' option-seq `}'\n\
- option-seq ::= empty | option-stmt [`;'] option-seq\n\
-\n\
-Option syntax\n\
- option-stmt ::= q-option\n\
- q-option ::= option\n\
- | prefix `.' q-option\n\
- | prefix `{' option-seq `}'\n\
- prefix ::= word\n\
-\n\
-File source and target\n\
- source ::= file\n\
- target ::= file\n\
- file ::= `file' [`.'] fspec [`,' fspec]\n\
- fspec ::= fd-spec | name-spec | null-spec\n\
- fd-spec ::= [[`:']`fd'[`:']] number|`stdin'|`stdout'\n\
- name-spec ::= [[`:']`file'[`:']] file-name\n\
- file-name ::= path-seq | [ path-seq ]\n\
- path-seq ::= path-elt | path-seq path-elt\n\
- path-elt ::= `/' | word\n\
- null-spec ::= [`:']`null'[`:']\n\
-\n\
-Exec source and target\n\
- source ::= exec\n\
- target ::= exec\n\
- exec ::= `exec' [`.'] cmd-spec\n\
- cmd-spec ::= shell-cmd | [prog-name] `[' argv0 arg-seq `]'\n\
- arg-seq ::= word | arg-seq word\n\
- shell-cmd ::= word\n\
- argv0 ::= word\n\
-\n\
-Socket source and target\n\
- source ::= socket-source\n\
- target ::= socket-target\n\
- socket-source ::= [`socket'[`.']] [[`:']addr-type[`:']] source-addr\n\
- socket-target ::= [`socket'[`.']] [[`:']addr-type[`:']] target-addr\n\
-\n\
- inet-source-addr ::= [port] port\n\
- inet-target-addr ::= address [`:'] port\n\
- address ::= addr-elt | address addr-elt\n\
- addr-elt ::= `.' | word\n\
-\n\
- unix-source-addr ::= file-name\n\
- unix-target-addr ::= file-name\n\
-");