#ifndef ACTION_H
#define ACTION_H
/*
* Create a squashfs filesystem. This is a highly compressed read only
* filesystem.
*
* Copyright (c) 2011, 2012, 2013, 2014
* 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 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 {
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;
};
/*
* 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 *);
extern void *get_frag_action(void *);
extern int eval_exclude_actions(char *, char *, char *, struct stat *, 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 void do_move_actions();
extern int read_bytes(int, void *, int);
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();
#endif