7e8fac16ad
* grub-core/script/execute.c (grub_script_arglist_to_argv): Handle GRUB_SCRIPT_ARG_TYPE_GETTEXT. * grub-core/script/yylex.l: Likewise. * include/grub/script_sh.h (GRUB_SCRIPT_ARG_TYPE_GETTEXT): New enum value.
392 lines
11 KiB
Text
392 lines
11 KiB
Text
%{
|
|
/* yylex.l The scripting lexer. */
|
|
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2009,2010 Free Software Foundation, Inc.
|
|
*
|
|
* GRUB is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* GRUB is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <grub/parser.h>
|
|
#include <grub/misc.h>
|
|
#include <grub/mm.h>
|
|
#include <grub/script_sh.h>
|
|
#include <grub/i18n.h>
|
|
#include "grub_script.tab.h"
|
|
|
|
#pragma GCC diagnostic ignored "-Wunused-parameter"
|
|
#pragma GCC diagnostic ignored "-Wmissing-prototypes"
|
|
#pragma GCC diagnostic ignored "-Wmissing-declarations"
|
|
#pragma GCC diagnostic ignored "-Wunsafe-loop-optimizations"
|
|
|
|
#define yyfree grub_lexer_yyfree
|
|
#define yyalloc grub_lexer_yyalloc
|
|
#define yyrealloc grub_lexer_yyrealloc
|
|
|
|
/*
|
|
* As we don't have access to yyscanner, we cannot do much except to
|
|
* print the fatal error.
|
|
*/
|
|
#define YY_FATAL_ERROR(msg) \
|
|
do { \
|
|
grub_printf (_("fatal error: %s\n"), _(msg)); \
|
|
} while (0)
|
|
|
|
#define COPY(str, hint) \
|
|
do { \
|
|
copy_string (yyextra, str, hint); \
|
|
} while (0)
|
|
|
|
|
|
#define RECORD \
|
|
do { \
|
|
grub_script_lexer_record (yyextra, yytext); \
|
|
} while (0)
|
|
|
|
#define ARG(t) \
|
|
do { \
|
|
yyextra->lexerstate->type = t; \
|
|
return GRUB_PARSER_TOKEN_WORD; \
|
|
} while (0)
|
|
|
|
/* We don't need YY_INPUT, as we rely on yy_scan_strings */
|
|
#define YY_INPUT(buf,res,max) do { res = 0; } while (0)
|
|
|
|
/* forward declarations */
|
|
static int grub_lexer_unput (const char *input, yyscan_t yyscanner);
|
|
static int grub_lexer_resplit (const char *input, yyscan_t yyscanner);
|
|
|
|
static void grub_lexer_yyfree (void *, yyscan_t yyscanner);
|
|
static void* grub_lexer_yyalloc (yy_size_t, yyscan_t yyscanner);
|
|
static void* grub_lexer_yyrealloc (void*, yy_size_t, yyscan_t yyscanner);
|
|
static void copy_string (struct grub_parser_param *, const char *,
|
|
unsigned hint);
|
|
|
|
%}
|
|
|
|
%top{
|
|
|
|
#include <config.h>
|
|
|
|
#include <sys/types.h>
|
|
|
|
typedef size_t yy_size_t;
|
|
#define YY_TYPEDEF_YY_SIZE_T 1
|
|
|
|
/*
|
|
* Some flex hacks for -nostdinc; XXX We need to fix these when libc
|
|
* support becomes availble in GRUB.
|
|
*/
|
|
|
|
#ifndef GRUB_UTIL
|
|
#define stdin 0
|
|
#define stdout 0
|
|
|
|
#define fprintf(...) 0
|
|
#define exit(...)
|
|
#endif
|
|
|
|
}
|
|
|
|
%option ecs
|
|
%option meta-ecs
|
|
|
|
%option warn
|
|
%option array
|
|
%option stack
|
|
%option reentrant
|
|
%option bison-bridge
|
|
%option never-interactive
|
|
|
|
%option noyyfree noyyalloc noyyrealloc
|
|
%option nounistd nostdinit nodefault noyylineno
|
|
|
|
/* Reduce lexer size, by not defining these. */
|
|
%option noyy_top_state
|
|
%option noinput nounput
|
|
%option noyyget_in noyyset_in
|
|
%option noyyget_out noyyset_out
|
|
%option noyyget_debug noyyset_debug
|
|
%option noyyget_lineno noyyset_lineno
|
|
|
|
%option extra-type="struct grub_parser_param*"
|
|
|
|
BLANK [ \t]
|
|
COMMENT #.*$
|
|
|
|
CHAR [^{}|&$;<> \t\n\'\"\\]
|
|
DIGITS [[:digit:]]+
|
|
NAME [[:alpha:]_][[:alnum:]_]*
|
|
|
|
ESC \\(.|\n)
|
|
SQCHR [^\']
|
|
DQCHR {ESC}|[^\\\"]
|
|
DQSTR \"{DQCHR}*\"
|
|
I18NSTR \$\"{DQCHR}*\"
|
|
SQSTR \'{SQCHR}*\'
|
|
SPECIAL \?|\#|\*|\@
|
|
VARIABLE ${NAME}|$\{{NAME}\}|${DIGITS}|$\{{DIGITS}\}|${SPECIAL}|$\{{SPECIAL}\}
|
|
WORD ({CHAR}|{DQSTR}|{SQSTR}|{ESC}|{VARIABLE}|{I18NSTR})+
|
|
|
|
MULTILINE {WORD}?((\"{DQCHR}*)|(\'{SQCHR}*)|(\\\n))
|
|
|
|
%x SPLIT
|
|
%x DQUOTE
|
|
%x I18NQUOTE
|
|
%x SQUOTE
|
|
%x VAR
|
|
|
|
%%
|
|
|
|
/* White spaces */
|
|
{BLANK}+ { RECORD; }
|
|
{COMMENT} { RECORD; }
|
|
|
|
/* Special symbols */
|
|
"\n" { RECORD; return GRUB_PARSER_TOKEN_NEWLINE; }
|
|
"||" { RECORD; return GRUB_PARSER_TOKEN_OR; }
|
|
"&&" { RECORD; return GRUB_PARSER_TOKEN_AND; }
|
|
";;" { RECORD; return GRUB_PARSER_TOKEN_SEMI2; }
|
|
"|" { RECORD; return GRUB_PARSER_TOKEN_PIPE; }
|
|
"&" { RECORD; return GRUB_PARSER_TOKEN_AMP; }
|
|
";" { RECORD; return GRUB_PARSER_TOKEN_SEMI; }
|
|
"<" { RECORD; return GRUB_PARSER_TOKEN_LT; }
|
|
">" { RECORD; return GRUB_PARSER_TOKEN_GT; }
|
|
|
|
/* Reserved words */
|
|
"{" { RECORD; return GRUB_PARSER_TOKEN_LBR; }
|
|
"}" { RECORD; return GRUB_PARSER_TOKEN_RBR; }
|
|
"[[" { RECORD; return GRUB_PARSER_TOKEN_RSQBR2; }
|
|
"]]" { RECORD; return GRUB_PARSER_TOKEN_LSQBR2; }
|
|
"case" { RECORD; return GRUB_PARSER_TOKEN_CASE; }
|
|
"do" { RECORD; return GRUB_PARSER_TOKEN_DO; }
|
|
"done" { RECORD; return GRUB_PARSER_TOKEN_DONE; }
|
|
"elif" { RECORD; return GRUB_PARSER_TOKEN_ELIF; }
|
|
"else" { RECORD; return GRUB_PARSER_TOKEN_ELSE; }
|
|
"esac" { RECORD; return GRUB_PARSER_TOKEN_ESAC; }
|
|
"fi" { RECORD; return GRUB_PARSER_TOKEN_FI; }
|
|
"for" { RECORD; return GRUB_PARSER_TOKEN_FOR; }
|
|
"if" { RECORD; return GRUB_PARSER_TOKEN_IF; }
|
|
"in" { RECORD; return GRUB_PARSER_TOKEN_IN; }
|
|
"select" { RECORD; return GRUB_PARSER_TOKEN_SELECT; }
|
|
"then" { RECORD; return GRUB_PARSER_TOKEN_THEN; }
|
|
"until" { RECORD; return GRUB_PARSER_TOKEN_UNTIL; }
|
|
"while" { RECORD; return GRUB_PARSER_TOKEN_WHILE; }
|
|
"function" { RECORD; return GRUB_PARSER_TOKEN_FUNCTION; }
|
|
|
|
{MULTILINE} {
|
|
if (grub_lexer_unput (yytext, yyscanner))
|
|
return GRUB_PARSER_TOKEN_BAD;
|
|
}
|
|
|
|
{NAME} { RECORD; return GRUB_PARSER_TOKEN_NAME; }
|
|
{WORD} {
|
|
RECORD;
|
|
yypush_buffer_state (YY_CURRENT_BUFFER, yyscanner);
|
|
if (grub_lexer_resplit (yytext, yyscanner))
|
|
{
|
|
yypop_buffer_state (yyscanner);
|
|
return GRUB_PARSER_TOKEN_WORD;
|
|
}
|
|
yyextra->lexerstate->resplit = 1;
|
|
}
|
|
. {
|
|
grub_script_yyerror (yyextra, yytext);
|
|
return GRUB_PARSER_TOKEN_BAD;
|
|
}
|
|
|
|
/* Split word into multiple args */
|
|
|
|
<SPLIT>{
|
|
\\. { COPY (yytext + 1, yyleng - 1); }
|
|
\\\n { /* ignore */ }
|
|
\" {
|
|
yy_push_state (DQUOTE, yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_TEXT);
|
|
}
|
|
\' {
|
|
yy_push_state (SQUOTE, yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_TEXT);
|
|
}
|
|
"\$\"" {
|
|
yy_push_state (I18NQUOTE, yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_GETTEXT);
|
|
}
|
|
\$ {
|
|
yy_push_state (VAR, yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_TEXT);
|
|
}
|
|
\\ |
|
|
[^\"\'\$\\]+ { COPY (yytext, yyleng); }
|
|
<<EOF>> {
|
|
yy_pop_state (yyscanner);
|
|
yypop_buffer_state (yyscanner);
|
|
yyextra->lexerstate->resplit = 0;
|
|
yyextra->lexerstate->merge_end = 1;
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_TEXT);
|
|
}
|
|
}
|
|
|
|
<VAR>{
|
|
{SPECIAL} |
|
|
{DIGITS} |
|
|
{NAME} {
|
|
COPY (yytext, yyleng);
|
|
yy_pop_state (yyscanner);
|
|
if (YY_START == SPLIT)
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_VAR);
|
|
else
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_DQVAR);
|
|
}
|
|
\{{SPECIAL}\} |
|
|
\{{DIGITS}\} |
|
|
\{{NAME}\} {
|
|
yytext[yyleng - 1] = '\0';
|
|
COPY (yytext + 1, yyleng - 2);
|
|
yy_pop_state (yyscanner);
|
|
if (YY_START == SPLIT)
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_VAR);
|
|
else
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_DQVAR);
|
|
}
|
|
.|\n { return GRUB_PARSER_TOKEN_BAD; }
|
|
}
|
|
|
|
<SQUOTE>{
|
|
\' {
|
|
yy_pop_state (yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_SQSTR);
|
|
}
|
|
[^\']+ { COPY (yytext, yyleng); }
|
|
}
|
|
|
|
<DQUOTE>{
|
|
\\\$ { COPY ("$", 1); }
|
|
\\\\ { COPY ("\\", 1); }
|
|
\\\" { COPY ("\"", 1); }
|
|
\\\n { /* ignore */ }
|
|
[^\"\$\\\n]+ { COPY (yytext, yyleng); }
|
|
\" {
|
|
yy_pop_state (yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_DQSTR);
|
|
}
|
|
\$ {
|
|
yy_push_state (VAR, yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_DQSTR);
|
|
}
|
|
(.|\n) { COPY (yytext, yyleng); }
|
|
}
|
|
|
|
<I18NQUOTE>{
|
|
\\\\ { COPY ("\\", 1); }
|
|
\\\" { COPY ("\"", 1); }
|
|
\\\n { /* ignore */ }
|
|
[^\"\\\n]+ { COPY (yytext, yyleng); }
|
|
\" {
|
|
yy_pop_state (yyscanner);
|
|
ARG (GRUB_SCRIPT_ARG_TYPE_GETTEXT);
|
|
}
|
|
(.|\n) { COPY (yytext, yyleng); }
|
|
}
|
|
|
|
<<EOF>> {
|
|
yypop_buffer_state (yyscanner);
|
|
yyextra->lexerstate->eof = 1;
|
|
return GRUB_PARSER_TOKEN_EOF;
|
|
}
|
|
%%
|
|
|
|
int
|
|
yywrap (yyscan_t yyscanner)
|
|
{
|
|
if (yyget_extra (yyscanner)->lexerstate->resplit)
|
|
return 1;
|
|
|
|
return grub_script_lexer_yywrap (yyget_extra (yyscanner), 0);
|
|
}
|
|
|
|
static void
|
|
grub_lexer_yyfree (void *ptr, yyscan_t yyscanner __attribute__ ((unused)))
|
|
{
|
|
grub_free(ptr);
|
|
}
|
|
|
|
static void*
|
|
grub_lexer_yyalloc (yy_size_t size, yyscan_t yyscanner __attribute__ ((unused)))
|
|
{
|
|
return grub_malloc (size);
|
|
}
|
|
|
|
static void*
|
|
grub_lexer_yyrealloc (void *ptr, yy_size_t size,
|
|
yyscan_t yyscanner __attribute__ ((unused)))
|
|
{
|
|
return grub_realloc (ptr, size);
|
|
}
|
|
|
|
static void copy_string (struct grub_parser_param *parser, const char *str, unsigned hint)
|
|
{
|
|
grub_size_t size;
|
|
char *ptr;
|
|
unsigned len;
|
|
|
|
len = hint ? hint : grub_strlen (str);
|
|
if (parser->lexerstate->used + len >= parser->lexerstate->size)
|
|
{
|
|
size = len * 2;
|
|
if (size < parser->lexerstate->size * 2)
|
|
size = parser->lexerstate->size * 2;
|
|
ptr = grub_realloc (parser->lexerstate->text, size);
|
|
if (!ptr)
|
|
{
|
|
grub_script_yyerror (parser, 0);
|
|
return;
|
|
}
|
|
|
|
parser->lexerstate->text = ptr;
|
|
parser->lexerstate->size = size;
|
|
}
|
|
grub_strcpy (parser->lexerstate->text + parser->lexerstate->used - 1, str);
|
|
parser->lexerstate->used += len;
|
|
}
|
|
|
|
static int
|
|
grub_lexer_resplit (const char *text, yyscan_t yyscanner)
|
|
{
|
|
/* resplit text */
|
|
if (yy_scan_string (text, yyscanner))
|
|
{
|
|
yyget_extra (yyscanner)->lexerstate->merge_start = 1;
|
|
yy_push_state (SPLIT, yyscanner);
|
|
return 0;
|
|
}
|
|
grub_script_yyerror (yyget_extra (yyscanner), 0);
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
grub_lexer_unput (const char *text, yyscan_t yyscanner)
|
|
{
|
|
struct grub_lexer_param *lexerstate = yyget_extra (yyscanner)->lexerstate;
|
|
|
|
grub_free (lexerstate->prefix);
|
|
|
|
lexerstate->prefix = grub_strdup (text);
|
|
if (! lexerstate->prefix)
|
|
{
|
|
grub_script_yyerror (yyget_extra (yyscanner), N_("out of memory"));
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|