ajoute le fichier de la grammaire du 42sh

good_input:	  simple_list '\n'

		| '\n'

		| EOF

redirection:  [NUMBER] '>' WORD

		| [NUMBER] '<' WORD

		| [NUMBER] '>>' WORD

		| [NUMBER] '<<' WORD

		| [NUMBER] '<<-' WORD

		| [NUMBER] '>&' WORD

		| [NUMBER] '<&' WORD

		| [NUMBER] '>|' WORD

		| [NUMBER] '<>' WORD

element:	  WORD

		| redirection

cmd_prefix:	  ASSIGMENT_WORD

		| redirection

simple_command:	(cmp_prefix)* (element)+

command:	  simple_command

		| shell_command  (redirection)*

		| function_def

simple_list:	and_or ((';'|'&') and_or)* ['&'|';']

and_or:	pipeline (('&&'|'||') ('\n')* pipeline)*

pipeline:	['!'] command ('|' ('\n')* command)*

shell_command:	'{' compound_list '}'

                | '(' compound_list ')'

                | rule_for

                | rule_while

                | rule_until

                | rule_case

                | rule_if

rule_if:  'if' compound_list 'then' compound_list [else_clause] 'fi'

else_clause:  'else' compound_list

		| 'elif' compound_list 'then' compound_list [else_clause]

rule_for:	'for' WORD ('\n')* ['in' (WORD)+ (';'|'\n') ('\n')*] do_group

rule_while:	'while' compound_list do_group

rule_until:	'until' compound_list do_group

do_group:	'do' compound_list 'done'

compound_list:  ('\n')* and_or ((';'|'&'|'\n') ('\n')* and_or)* [(('&'|';'|'\n') ('\n')*)]

case:	'case' WORD ('\n')* 'in' ('\n')* [case_clause] 'esac'

case_clause:	pattern (';;' (\n)* pattern)* [;;]

pattern:	['('] WORD ('|' WORD)* ')' ( ('\n')* | compound_list )

function:	['function'] WORD '(' ')' ('\n')* shell_command (redirection)*

** Login   <seblu@epita.fr>

**

** Started on  Wed Aug  2 01:13:56 2006 Seblu

** Last update Wed Aug  2 17:58:03 2006 Seblu

** Last update Wed Aug  2 20:24:51 2006 Seblu

*/

#include <string.h>