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/*-
* Copyright (c) 2002-2003 M. Warner Losh.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#ifndef DEVD_HH
#define DEVD_HH
class config;
/**
* var_list is a collection of variables. These collections of variables
* are stacked up and popped down for each event that we have to process.
* We have multiple levels so that we can push variables that are unique
* to the event in question, in addition to having global variables. This
* allows for future flexibility.
*/
class var_list
{
public:
var_list() {}
virtual ~var_list() {}
/** Set a variable in this var list.
*/
void set_variable(const std::string &var, const std::string &val);
/** Get the variable out of this, and no other, var_list. If
* no variable of %var is set, then %bogus will be returned.
*/
const std::string &get_variable(const std::string &var) const;
/** Is there a variable of %var set in thi stable?
*/
bool is_set(const std::string &var) const;
/** A completely bogus string.
*/
static const std::string bogus;
static const std::string nothing;
private:
std::map<std::string, std::string> _vars;
};
/**
* eps is short for event_proc_single. It is a single entry in an
* event_proc. Each keyword needs its own subclass from eps.
*/
class eps
{
public:
eps() {}
virtual ~eps() {}
/** Does this eps match the current config?
*/
virtual bool do_match(config &) = 0;
/** Perform some action for this eps.
*/
virtual bool do_action(config &) = 0;
};
/**
* match is the subclass used to match an individual variable. Its
* actions are nops.
*/
class match : public eps
{
public:
match(config &, const char *var, const char *re);
virtual ~match();
virtual bool do_match(config &);
virtual bool do_action(config &) { return true; }
private:
std::string _var;
std::string _re;
regex_t _regex;
};
/**
* action is used to fork a process. It matches everything.
*/
class action : public eps
{
public:
action(const char *cmd);
virtual ~action();
virtual bool do_match(config &) { return true; }
virtual bool do_action(config &);
private:
std::string _cmd;
};
class event_proc
{
public:
event_proc();
virtual ~event_proc();
int get_priority() const { return (_prio); }
void set_priority(int prio) { _prio = prio; }
void add(eps *);
bool matches(config &);
bool run(config &);
private:
int _prio;
std::vector<eps *> _epsvec;
};
class config
{
public:
config() : _pidfile("") { push_var_table(); }
virtual ~config() { reset(); }
void add_attach(int, event_proc *);
void add_detach(int, event_proc *);
void add_directory(const char *);
void add_nomatch(int, event_proc *);
void add_notify(int, event_proc *);
void set_pidfile(const char *);
void reset();
void parse();
void drop_pidfile();
void push_var_table();
void pop_var_table();
void set_variable(const char *var, const char *val);
const std::string &get_variable(const std::string &var);
const std::string expand_string(const std::string &var);
char *set_vars(char *);
void find_and_execute(char);
protected:
void sort_vector(std::vector<event_proc *> &);
void parse_one_file(const char *fn);
void parse_files_in_dir(const char *dirname);
void expand_one(const char *&src, std::string &dst);
bool is_id_char(char);
bool chop_var(char *&buffer, char *&lhs, char *&rhs);
private:
std::vector<std::string> _dir_list;
std::string _pidfile;
std::vector<var_list *> _var_list_table;
std::vector<event_proc *> _attach_list;
std::vector<event_proc *> _detach_list;
std::vector<event_proc *> _nomatch_list;
std::vector<event_proc *> _notify_list;
};
#endif /* DEVD_HH */
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