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longpanda
328
SQUASHFS/squashfs-tools-4.4/squashfs-tools/action.h
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328
SQUASHFS/squashfs-tools-4.4/squashfs-tools/action.h
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#ifndef ACTION_H
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#define ACTION_H
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/*
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* Create a squashfs filesystem. This is a highly compressed read only
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* filesystem.
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*
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* Copyright (c) 2011, 2012, 2013, 2014
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2,
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* or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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* action.h
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*/
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/*
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* Lexical analyser definitions
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*/
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#define TOK_OPEN_BRACKET 0
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#define TOK_CLOSE_BRACKET 1
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#define TOK_AND 2
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#define TOK_OR 3
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#define TOK_NOT 4
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#define TOK_COMMA 5
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#define TOK_AT 6
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#define TOK_WHITE_SPACE 7
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#define TOK_STRING 8
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#define TOK_EOF 9
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#define TOK_TO_STR(OP, S) ({ \
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char *s; \
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switch(OP) { \
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case TOK_EOF: \
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s = "EOF"; \
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break; \
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case TOK_STRING: \
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s = S; \
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break; \
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default: \
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s = token_table[OP].string; \
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break; \
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} \
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s; \
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})
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struct token_entry {
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char *string;
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int token;
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int size;
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};
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/*
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* Expression parser definitions
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*/
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#define OP_TYPE 0
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#define ATOM_TYPE 1
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#define UNARY_TYPE 2
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#define SYNTAX_ERROR(S, ARGS...) { \
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char *src = strdup(source); \
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src[cur_ptr - source] = '\0'; \
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fprintf(stderr, "Failed to parse action \"%s\"\n", source); \
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fprintf(stderr, "Syntax error: "S, ##ARGS); \
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fprintf(stderr, "Got here \"%s\"\n", src); \
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free(src); \
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}
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#define TEST_SYNTAX_ERROR(TEST, ARG, S, ARGS...) { \
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char *src = strdup(source); \
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src[cur_ptr - source] = '\0'; \
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fprintf(stderr, "Failed to parse action \"%s\"\n", source); \
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fprintf(stderr, "Syntax error in \"%s()\", arg %d: "S, TEST->name, \
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ARG, ##ARGS); \
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fprintf(stderr, "Got here \"%s\"\n", src); \
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free(src); \
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}
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struct expr;
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struct expr_op {
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struct expr *lhs;
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struct expr *rhs;
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int op;
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};
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struct atom {
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struct test_entry *test;
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int args;
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char **argv;
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void *data;
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};
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struct unary_op {
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struct expr *expr;
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int op;
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};
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struct expr {
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int type;
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union {
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struct atom atom;
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struct expr_op expr_op;
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struct unary_op unary_op;
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};
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};
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/*
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* Test operation definitions
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*/
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#define NUM_EQ 1
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#define NUM_LESS 2
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#define NUM_GREATER 3
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struct test_number_arg {
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long long size;
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int range;
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};
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struct test_range_args {
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long long start;
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long long end;
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};
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struct action;
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struct action_data;
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struct test_entry {
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char *name;
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int args;
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int (*fn)(struct atom *, struct action_data *);
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int (*parse_args)(struct test_entry *, struct atom *);
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int exclude_ok;
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int handle_logging;
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};
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/*
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* Type test specific definitions
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*/
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struct type_entry {
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int value;
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char type;
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};
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/*
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* Action definitions
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*/
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#define FRAGMENT_ACTION 0
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#define EXCLUDE_ACTION 1
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#define FRAGMENTS_ACTION 2
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#define NO_FRAGMENTS_ACTION 3
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#define ALWAYS_FRAGS_ACTION 4
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#define NO_ALWAYS_FRAGS_ACTION 5
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#define COMPRESSED_ACTION 6
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#define UNCOMPRESSED_ACTION 7
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#define UID_ACTION 8
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#define GID_ACTION 9
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#define GUID_ACTION 10
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#define MODE_ACTION 11
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#define EMPTY_ACTION 12
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#define MOVE_ACTION 13
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#define PRUNE_ACTION 14
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#define NOOP_ACTION 15
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/*
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* Define what file types each action operates over
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*/
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#define ACTION_DIR 1
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#define ACTION_REG 2
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#define ACTION_ALL_LNK 3
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#define ACTION_ALL 4
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#define ACTION_LNK 5
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/*
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* Action logging requested, specified by the various
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* -action, -true-action, -false-action and -verbose-action
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* options
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*/
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#define ACTION_LOG_NONE 0
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#define ACTION_LOG_TRUE 1
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#define ACTION_LOG_FALSE 2
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#define ACTION_LOG_VERBOSE ACTION_LOG_TRUE | ACTION_LOG_FALSE
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struct action_entry {
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char *name;
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int type;
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int args;
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int file_types;
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int (*parse_args)(struct action_entry *, int, char **, void **);
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void (*run_action)(struct action *, struct dir_ent *);
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};
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struct action_data {
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int depth;
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char *name;
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char *pathname;
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char *subpath;
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struct stat *buf;
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struct dir_ent *dir_ent;
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struct dir_info *root;
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};
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struct action {
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int type;
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struct action_entry *action;
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int args;
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char **argv;
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struct expr *expr;
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void *data;
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int verbose;
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};
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/*
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* Uid/gid action specific definitions
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*/
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struct uid_info {
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uid_t uid;
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};
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struct gid_info {
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gid_t gid;
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};
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struct guid_info {
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uid_t uid;
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gid_t gid;
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};
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/*
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* Mode action specific definitions
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*/
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#define ACTION_MODE_SET 0
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#define ACTION_MODE_ADD 1
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#define ACTION_MODE_REM 2
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#define ACTION_MODE_OCT 3
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struct mode_data {
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struct mode_data *next;
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int operation;
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int mode;
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unsigned int mask;
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char X;
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};
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/*
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* Empty action specific definitions
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*/
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#define EMPTY_ALL 0
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#define EMPTY_SOURCE 1
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#define EMPTY_EXCLUDED 2
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struct empty_data {
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int val;
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};
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/*
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* Move action specific definitions
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*/
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#define ACTION_MOVE_RENAME 1
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#define ACTION_MOVE_MOVE 2
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struct move_ent {
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int ops;
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struct dir_ent *dir_ent;
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char *name;
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struct dir_info *dest;
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struct move_ent *next;
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};
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/*
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* Perm test function specific definitions
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*/
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#define PERM_ALL 1
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#define PERM_ANY 2
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#define PERM_EXACT 3
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struct perm_data {
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int op;
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int mode;
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};
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/*
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* External function definitions
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*/
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extern int parse_action(char *, int verbose);
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extern void dump_actions();
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extern void *eval_frag_actions(struct dir_info *, struct dir_ent *);
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extern void *get_frag_action(void *);
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extern int eval_exclude_actions(char *, char *, char *, struct stat *, int,
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struct dir_ent *);
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extern void eval_actions(struct dir_info *, struct dir_ent *);
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extern int eval_empty_actions(struct dir_info *, struct dir_ent *dir_ent);
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extern void eval_move_actions(struct dir_info *, struct dir_ent *);
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extern int eval_prune_actions(struct dir_info *, struct dir_ent *);
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extern void do_move_actions();
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extern int read_bytes(int, void *, int);
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extern int actions();
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extern int move_actions();
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extern int empty_actions();
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extern int read_action_file(char *, int);
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extern int exclude_actions();
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extern int prune_actions();
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#endif
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