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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
%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; }
;
command:
part {
$$ = $1;
}
| part separator command {
$$ = newcmd();
$$->type = $2;
$$->left = $1;
$$->right = $3;
}
;
separator:
PIPE { $$ = CMD_PIPE; }
| AND { $$ = CMD_AND; }
| OR { $$ = CMD_OR; }
;
part:
part WORD {
$$ = $1;
$$->argc++;
$$->args = realloc($$->args, ($$->argc + 1) * sizeof(char *));
$$->args[$$->argc - 1] = $2;
$$->args[$$->argc] = NULL;
}
| WORD {
$$ = newcmd();
$$->args = malloc(2 * sizeof(char *));
$$->args[$$->argc++] = $1;
$$->args[$$->argc] = NULL;
}
| part REDIRECT_IN WORD {
$$ = $1;
$$->redirectFile[0] = $3;
}
| part REDIRECT_OUT WORD {
$$ = $1;
$$->redirectFile[1] = $3;
}
| part FD_REDIRECT {
$$ = $1;
$$->redirectFD[$2[0]-'0']=$2[3]-'0';
}
| part BACKGROUND {
$$ = $1;
$$->background = true;
}
;
%%
|
