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Diffstat (limited to 'squashfs-tools/action.h')
| -rw-r--r-- | squashfs-tools/action.h | 351 |
1 files changed, 351 insertions, 0 deletions
diff --git a/squashfs-tools/action.h b/squashfs-tools/action.h new file mode 100644 index 0000000..183daaa --- /dev/null +++ b/squashfs-tools/action.h @@ -0,0 +1,351 @@ +#ifndef ACTION_H +#define ACTION_H +/* + * Create a squashfs filesystem. This is a highly compressed read only + * filesystem. + * + * Copyright (c) 2011, 2012, 2013, 2014, 2021, 2022 + * Phillip Lougher <phillip@squashfs.org.uk> + * + * This program 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 2, + * or (at your option) any later version. + * + * This program 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 this program; if not, write to the Free Software + * Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + * + * action.h + */ + +/* + * Lexical analyser definitions + */ +#define TOK_OPEN_BRACKET 0 +#define TOK_CLOSE_BRACKET 1 +#define TOK_AND 2 +#define TOK_OR 3 +#define TOK_NOT 4 +#define TOK_COMMA 5 +#define TOK_AT 6 +#define TOK_WHITE_SPACE 7 +#define TOK_STRING 8 +#define TOK_EOF 9 + +#define TOK_TO_STR(OP, S) ({ \ + char *s; \ + switch(OP) { \ + case TOK_EOF: \ + s = "EOF"; \ + break; \ + case TOK_STRING: \ + s = S; \ + break; \ + default: \ + s = token_table[OP].string; \ + break; \ + } \ + s; \ +}) + + +struct token_entry { + char *string; + int token; + int size; +}; + +/* + * Expression parser definitions + */ +#define OP_TYPE 0 +#define ATOM_TYPE 1 +#define UNARY_TYPE 2 + +#define SYNTAX_ERROR(S, ARGS...) { \ + char *src = strdup(source); \ + src[cur_ptr - source] = '\0'; \ + fprintf(stderr, "Failed to parse action \"%s\"\n", source); \ + fprintf(stderr, "Syntax error: "S, ##ARGS); \ + fprintf(stderr, "Got here \"%s\"\n", src); \ + free(src); \ +} + +#define TEST_SYNTAX_ERROR(TEST, ARG, S, ARGS...) { \ + char *src = strdup(source); \ + src[cur_ptr - source] = '\0'; \ + fprintf(stderr, "Failed to parse action \"%s\"\n", source); \ + fprintf(stderr, "Syntax error in \"%s()\", arg %d: "S, TEST->name, \ + ARG, ##ARGS); \ + fprintf(stderr, "Got here \"%s\"\n", src); \ + free(src); \ +} + +struct expr; + +struct expr_op { + struct expr *lhs; + struct expr *rhs; + int op; +}; + + +struct atom { + struct test_entry *test; + int args; + char **argv; + void *data; +}; + + +struct unary_op { + struct expr *expr; + int op; +}; + + +struct expr { + int type; + union { + struct atom atom; + struct expr_op expr_op; + struct unary_op unary_op; + }; +}; + +/* + * Test operation definitions + */ +#define NUM_EQ 1 +#define NUM_LESS 2 +#define NUM_GREATER 3 + +struct test_number_arg { + long long size; + int range; +}; + +struct test_range_args { + long long start; + long long end; +}; + +struct action; +struct action_data; + +struct test_entry { + char *name; + int args; + int (*fn)(struct atom *, struct action_data *); + int (*parse_args)(struct test_entry *, struct atom *); + int exclude_ok; + int handle_logging; +}; + + +/* + * Type test specific definitions + */ +struct type_entry { + int value; + char type; +}; + + +/* + * Action definitions + */ +#define FRAGMENT_ACTION 0 +#define EXCLUDE_ACTION 1 +#define FRAGMENTS_ACTION 2 +#define NO_FRAGMENTS_ACTION 3 +#define ALWAYS_FRAGS_ACTION 4 +#define NO_ALWAYS_FRAGS_ACTION 5 +#define COMPRESSED_ACTION 6 +#define UNCOMPRESSED_ACTION 7 +#define UID_ACTION 8 +#define GID_ACTION 9 +#define GUID_ACTION 10 +#define MODE_ACTION 11 +#define EMPTY_ACTION 12 +#define MOVE_ACTION 13 +#define PRUNE_ACTION 14 +#define NOOP_ACTION 15 +#define XATTR_EXC_ACTION 16 +#define XATTR_INC_ACTION 17 +#define XATTR_ADD_ACTION 18 + +/* + * Define what file types each action operates over + */ +#define ACTION_DIR 1 +#define ACTION_REG 2 +#define ACTION_ALL_LNK 3 +#define ACTION_ALL 4 +#define ACTION_LNK 5 + + +/* + * Action logging requested, specified by the various + * -action, -true-action, -false-action and -verbose-action + * options + */ +#define ACTION_LOG_NONE 0 +#define ACTION_LOG_TRUE 1 +#define ACTION_LOG_FALSE 2 +#define ACTION_LOG_VERBOSE ACTION_LOG_TRUE | ACTION_LOG_FALSE + +struct action_entry { + char *name; + int type; + int args; + int file_types; + int (*parse_args)(struct action_entry *, int, char **, void **); + void (*run_action)(struct action *, struct dir_ent *); +}; + + +struct action_data { + unsigned int depth; + char *name; + char *pathname; + char *subpath; + struct stat *buf; + struct dir_ent *dir_ent; + struct dir_info *root; +}; + + +struct action { + int type; + struct action_entry *action; + int args; + char **argv; + struct expr *expr; + void *data; + int verbose; +}; + + +/* + * Uid/gid action specific definitions + */ +struct uid_info { + uid_t uid; +}; + +struct gid_info { + gid_t gid; +}; + +struct guid_info { + uid_t uid; + gid_t gid; +}; + + +/* + * Mode action specific definitions + */ +#define ACTION_MODE_SET 0 +#define ACTION_MODE_ADD 1 +#define ACTION_MODE_REM 2 +#define ACTION_MODE_OCT 3 + +struct mode_data { + struct mode_data *next; + int operation; + int mode; + unsigned int mask; + char X; +}; + + +/* + * Empty action specific definitions + */ +#define EMPTY_ALL 0 +#define EMPTY_SOURCE 1 +#define EMPTY_EXCLUDED 2 + +struct empty_data { + int val; +}; + + +/* + * Move action specific definitions + */ +#define ACTION_MOVE_RENAME 1 +#define ACTION_MOVE_MOVE 2 + +struct move_ent { + int ops; + struct dir_ent *dir_ent; + char *name; + struct dir_info *dest; + struct move_ent *next; +}; + + +/* + * Xattr action specific definitions + */ +struct xattr_data { + regex_t preg; + struct xattr_data *next; +}; + + +/* + * Perm test function specific definitions + */ +#define PERM_ALL 1 +#define PERM_ANY 2 +#define PERM_EXACT 3 + +struct perm_data { + int op; + int mode; +}; + + +/* + * External function definitions + */ +extern int parse_action(char *, int verbose); +extern void dump_actions(); +extern void *eval_frag_actions(struct dir_info *, struct dir_ent *, int); +extern void *get_frag_action(void *); +extern int eval_exclude_actions(char *, char *, char *, struct stat *, + unsigned int, struct dir_ent *); +extern void eval_actions(struct dir_info *, struct dir_ent *); +extern int eval_empty_actions(struct dir_info *, struct dir_ent *dir_ent); +extern void eval_move_actions(struct dir_info *, struct dir_ent *); +extern int eval_prune_actions(struct dir_info *, struct dir_ent *); +extern struct xattr_data *eval_xattr_exc_actions(struct dir_info *, + struct dir_ent *); +extern int match_xattr_exc_actions(struct xattr_data *, char *); +extern struct xattr_data *eval_xattr_inc_actions(struct dir_info *, + struct dir_ent *); +extern int match_xattr_inc_actions(struct xattr_data *, char *); +extern struct xattr_add *eval_xattr_add_actions(struct dir_info *root, + struct dir_ent *dir_ent, int *items); +extern void do_move_actions(); +extern long long read_bytes(int, void *, long long); +extern int any_actions(); +extern int actions(); +extern int move_actions(); +extern int empty_actions(); +extern int read_action_file(char *, int); +extern int exclude_actions(); +extern int prune_actions(); +extern int xattr_exc_actions(); +extern int xattr_add_actions(); +#endif |