git.ozlabs.org Git - petitboot/blob - discover/grub2/grub2.h

   1 #ifndef GRUB2_H
   2 #define GRUB2_H
   3
   4 #include <discover/device-handler.h>
   5
   6 #include <stdbool.h>
   7 #include <list/list.h>
   8
   9 struct grub2_script;
  10
  11 struct grub2_word {
  12         enum {
  13                 GRUB2_WORD_TEXT,
  14                 GRUB2_WORD_VAR,
  15         } type;
  16         union {
  17                 char            *text;
  18                 const char      *name;
  19         };
  20         bool                    split;
  21         struct grub2_word       *next;
  22         struct grub2_word       *last;
  23         struct list_item        argv_list;
  24 };
  25
  26 struct grub2_argv {
  27         struct list             words;
  28
  29         /* postprocessing (with process_expansions) populates these to hand to
  30          * the grub2_command callbacks */
  31         char                    **argv;
  32         int                     argc;
  33 };
  34
  35 struct grub2_statements {
  36         struct list             list;
  37 };
  38
  39 struct grub2_statement {
  40         struct list_item        list;
  41         enum {
  42                 STMT_TYPE_SIMPLE,
  43                 STMT_TYPE_MENUENTRY,
  44                 STMT_TYPE_IF,
  45                 STMT_TYPE_BLOCK,
  46         } type;
  47         int                     (*exec)(struct grub2_script *,
  48                                         struct grub2_statement *);
  49 };
  50
  51 struct grub2_statement_simple {
  52         struct grub2_statement  st;
  53         struct grub2_argv       *argv;
  54 };
  55
  56 struct grub2_statement_menuentry {
  57         struct grub2_statement  st;
  58         struct grub2_argv       *argv;
  59         struct grub2_statements *statements;
  60 };
  61
  62 struct grub2_statement_if {
  63         struct grub2_statement  st;
  64         struct grub2_statement  *condition;
  65         struct grub2_statements *true_case;
  66         struct grub2_statements *false_case;
  67 };
  68
  69 struct grub2_statement_block {
  70         struct grub2_statement  st;
  71         struct grub2_statements *statements;
  72 };
  73
  74 struct grub2_command {
  75         const char              *name;
  76         int                     (*exec)(struct grub2_script *script,
  77                                         int argc, char *argv[]);
  78         struct list_item        list;
  79 };
  80
  81 struct grub2_script {
  82         struct grub2_statements         *statements;
  83         struct list                     environment;
  84         struct list                     commands;
  85         struct list                     symtab;
  86         struct discover_context         *ctx;
  87         struct discover_boot_option     *opt;
  88 };
  89
  90 struct grub2_parser {
  91         void                    *scanner;
  92         struct grub2_script     *script;
  93 };
  94
  95 struct grub2_root {
  96         char *uuid;
  97 };
  98
  99 struct grub2_statements *create_statements(struct grub2_parser *parser);
 100
 101 struct grub2_statement *create_statement_simple(struct grub2_parser *parser,
 102                 struct grub2_argv *argv);
 103
 104 struct grub2_statement *create_statement_menuentry(struct grub2_parser *parser,
 105                 struct grub2_argv *argv, struct grub2_statements *stmts);
 106
 107 struct grub2_statement *create_statement_if(struct grub2_parser *parser,
 108                 struct grub2_statement *condition,
 109                 struct grub2_statements *true_case,
 110                 struct grub2_statements *false_case);
 111
 112 struct grub2_statement *create_statement_block(struct grub2_parser *parser,
 113                 struct grub2_statements *stmts);
 114
 115 struct grub2_word *create_word_text(struct grub2_parser *parser,
 116                 const char *text);
 117
 118 struct grub2_word *create_word_var(struct grub2_parser *parser,
 119                 const char *name, bool split);
 120
 121 struct grub2_argv *create_argv(struct grub2_parser *parser);
 122
 123 void statement_append(struct grub2_statements *stmts,
 124                 struct grub2_statement *stmt);
 125
 126 void argv_append(struct grub2_argv *argv, struct grub2_word *word);
 127
 128 void word_append(struct grub2_word *w1, struct grub2_word *w2);
 129
 130 /* script interface */
 131 void script_execute(struct grub2_script *script);
 132
 133 int statement_simple_execute(struct grub2_script *script,
 134                 struct grub2_statement *statement);
 135 int statement_if_execute(struct grub2_script *script,
 136                 struct grub2_statement *statement);
 137 int statement_menuentry_execute(struct grub2_script *script,
 138                 struct grub2_statement *statement);
 139
 140 struct grub2_script *create_script(struct grub2_parser *parser,
 141                 struct discover_context *ctx);
 142
 143 const char *script_env_get(struct grub2_script *script, const char *name);
 144
 145 void script_env_set(struct grub2_script *script,
 146                 const char *name, const char *value);
 147
 148 void script_register_command(struct grub2_script *script,
 149                 struct grub2_command *command);
 150
 151 struct grub2_command *script_lookup_command(struct grub2_script *script,
 152                 const char *name);
 153
 154 void register_builtins(struct grub2_script *script);
 155
 156 /* resources */
 157 struct resource *create_grub2_resource(void *ctx,
 158                 struct discover_device *orig_device,
 159                 struct grub2_root *root, const char *path);
 160
 161 bool resolve_grub2_resource(struct device_handler *handler,
 162                 struct resource *res);
 163
 164 /* external parser api */
 165 struct grub2_parser *grub2_parser_create(struct discover_context *ctx);
 166 void grub2_parser_parse(struct grub2_parser *parser, char *buf, int len);
 167 #endif /* GRUB2_H */
 168