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|
%{
#include "cmd.h"
#include "lex.yy.c"
#include <stdio.h>
%}
%union {
char *str;
struct Command *cmd;
CommandType cmdType;
int fd;
}
%token <str> WORD STRING error FD_REDIRECT
%token NEWLINE PIPE AND OR REDIRECT_IN REDIRECT_OUT BACKGROUND LPAREN RPAREN APPEND
%type <cmd> line command part runcommand
%type <cmdType> separator
%locations
%nonassoc WORD
%nonassoc BACKGROUND
%nonassoc REDIRECT_IN REDIRECT_OUT
%%
line:
runcommand line { /* empty */ }
| /* empty */ { $$ = NULL; }
;
runcommand:
command NEWLINE {
$$ = $1;
runCmd($$);
showPrompt();
}
| NEWLINE {
$$ = NULL;
showPrompt();
}
;
command:
part {
$$ = $1;
}
| part separator command {
$$ = newCmd();
$$->type = $2;
$$->left = $1;
$$->right = $3;
}
| LPAREN command RPAREN {
$$ = $2;
}
;
separator:
PIPE { $$ = CMD_PIPE; }
| AND { $$ = CMD_AND; }
| OR { $$ = CMD_OR; }
;
part:
part WORD {
$$ = $1;
argInsert($$, $2, false);
}
| WORD {
$$ = newCmd();
argInsert($$, $1, false);
}
| part STRING {
$$ = $1;
argInsert($$, $2, true);
}
| STRING {
$$ = newCmd();
argInsert($$, $1, true);
}
| part REDIRECT_IN WORD {
$$ = $1;
$$->redirectFile[0] = $3;
}
| part REDIRECT_OUT WORD {
$$ = $1;
$$->redirectFile[1] = $3;
}
| part APPEND WORD {
$$ = $1;
$$->redirectFile[1] = $3;
$$->redirectFD[1] = -1;
}
| part FD_REDIRECT {
$$ = $1;
$$->redirectFD[$2[0] - '0'] = $2[3] - '0';
}
| part BACKGROUND {
$$ = $1;
$$->background = true;
}
;
%%
|
