mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-23 11:18:54 +00:00
3054f218eb
o improve parsing and lexing o create data structures based on the parsed file now. o Still need to rewrite main loop and add regex (still uses hard coded devd-generic) o minor man page updates. # There should be one more commit before rc2 Approved by: re (blanket)
592 lines
11 KiB
C++
592 lines
11 KiB
C++
/*-
|
||
* Copyright (c) 2002 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.
|
||
*/
|
||
|
||
/*
|
||
* DEVD control daemon.
|
||
*/
|
||
|
||
// TODO list:
|
||
// o rewrite the main loop:
|
||
// - expand variables
|
||
// - find best match
|
||
// - execute it.
|
||
// o need to insert the event_proc structures in order of priority.
|
||
// bigger numbers mean higher priority.
|
||
// o devd.conf and devd man pages need a lot of help:
|
||
// - devd.conf needs to lose the warning about zone files.
|
||
// - devd.conf needs more details on the supported statements.
|
||
// - devd.conf needs an example or two.
|
||
|
||
#include <sys/cdefs.h>
|
||
__FBSDID("$FreeBSD$");
|
||
|
||
#include <sys/param.h>
|
||
#include <sys/types.h>
|
||
|
||
#include <dirent.h>
|
||
#include <errno.h>
|
||
#include <err.h>
|
||
#include <fcntl.h>
|
||
#include <stdlib.h>
|
||
#include <stdio.h>
|
||
#include <string.h>
|
||
#include <unistd.h>
|
||
|
||
#include <map>
|
||
#include <string>
|
||
#include <vector>
|
||
|
||
#include "devd.h"
|
||
|
||
#define CF "/etc/devd.conf"
|
||
|
||
using namespace std;
|
||
|
||
extern FILE *yyin;
|
||
extern int lineno;
|
||
|
||
int dflag;
|
||
int romeo_must_die = 0;
|
||
|
||
static void event_loop(void);
|
||
static void usage(void);
|
||
|
||
class config;
|
||
|
||
|
||
class var_list
|
||
{
|
||
public:
|
||
var_list() {}
|
||
virtual ~var_list() {}
|
||
void set_variable(const string &var, const string &val);
|
||
const string &get_variable(const string &var) const;
|
||
bool is_set(const string &var) const;
|
||
static const string bogus;
|
||
static const string nothing;
|
||
private:
|
||
map<string, string> _vars;
|
||
};
|
||
|
||
class eps
|
||
{
|
||
public:
|
||
eps() {}
|
||
virtual ~eps() {}
|
||
virtual bool do_match(config &) = 0;
|
||
virtual bool do_action(config &) = 0;
|
||
};
|
||
|
||
class match : public eps
|
||
{
|
||
public:
|
||
match(const char *var, const char *re);
|
||
virtual ~match();
|
||
virtual bool do_match(config &);
|
||
virtual bool do_action(config &) { return true; }
|
||
private:
|
||
string _var;
|
||
string _re;
|
||
};
|
||
|
||
class action : public eps
|
||
{
|
||
public:
|
||
action(const char *cmd);
|
||
virtual ~action();
|
||
virtual bool do_match(config &) { return true; }
|
||
virtual bool do_action(config &);
|
||
private:
|
||
string _cmd;
|
||
};
|
||
|
||
class event_proc
|
||
{
|
||
public:
|
||
event_proc();
|
||
virtual ~event_proc();
|
||
int get_priority() { return (_prio); }
|
||
void set_priority(int prio) { _prio = prio; }
|
||
void add(eps *);
|
||
bool matches(config &);
|
||
bool run(config &);
|
||
private:
|
||
int _prio;
|
||
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 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 string &get_variable(const string &var);
|
||
const string &expand_string(const string &var);
|
||
protected:
|
||
void parse_one_file(const char *fn);
|
||
void parse_files_in_dir(const char *dirname);
|
||
private:
|
||
vector<string> _dir_list;
|
||
string _pidfile;
|
||
vector<var_list *> _var_list_table;
|
||
vector<event_proc *> _attach_list;
|
||
vector<event_proc *> _detach_list;
|
||
vector<event_proc *> _nomatch_list;
|
||
};
|
||
|
||
config cfg;
|
||
|
||
event_proc::event_proc() : _prio(-1)
|
||
{
|
||
// nothing
|
||
}
|
||
|
||
event_proc::~event_proc()
|
||
{
|
||
vector<eps *>::const_iterator i;
|
||
|
||
for (i = _epsvec.begin(); i != _epsvec.end(); i++)
|
||
delete *i;
|
||
_epsvec.clear();
|
||
}
|
||
|
||
void
|
||
event_proc::add(eps *eps)
|
||
{
|
||
_epsvec.push_back(eps);
|
||
}
|
||
|
||
bool
|
||
event_proc::matches(config &c)
|
||
{
|
||
vector<eps *>::const_iterator i;
|
||
|
||
for (i = _epsvec.begin(); i != _epsvec.end(); i++)
|
||
if (!(*i)->do_match(c))
|
||
return (false);
|
||
return (true);
|
||
}
|
||
|
||
bool
|
||
event_proc::run(config &c)
|
||
{
|
||
vector<eps *>::const_iterator i;
|
||
|
||
for (i = _epsvec.begin(); i != _epsvec.end(); i++)
|
||
if (!(*i)->do_action(c))
|
||
return (false);
|
||
return (true);
|
||
}
|
||
|
||
action::action(const char *cmd)
|
||
: _cmd(cmd)
|
||
{
|
||
// nothing
|
||
}
|
||
|
||
action::~action()
|
||
{
|
||
// nothing
|
||
}
|
||
|
||
bool
|
||
action::do_action(config &)
|
||
{
|
||
// this is lame because we don't expand variables.
|
||
// xxx
|
||
::system(_cmd.c_str());
|
||
return (true);
|
||
}
|
||
|
||
match::match(const char *var, const char *re)
|
||
: _var(var), _re(re)
|
||
{
|
||
// nothing
|
||
}
|
||
|
||
match::~match()
|
||
{
|
||
// nothing
|
||
}
|
||
|
||
bool
|
||
match::do_match(config &)
|
||
{
|
||
// XXX
|
||
return false;
|
||
}
|
||
|
||
const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_";
|
||
const string var_list::nothing = "";
|
||
|
||
const string &
|
||
var_list::get_variable(const string &var) const
|
||
{
|
||
map<string, string>::const_iterator i;
|
||
|
||
i = _vars.find(var);
|
||
if (i == _vars.end())
|
||
return var_list::bogus;
|
||
return (i->second);
|
||
}
|
||
|
||
bool
|
||
var_list::is_set(const string &var) const
|
||
{
|
||
return (_vars.find(var) != _vars.end());
|
||
}
|
||
|
||
void
|
||
var_list::set_variable(const string &var, const string &val)
|
||
{
|
||
_vars[var] = val;
|
||
}
|
||
|
||
void
|
||
config::reset(void)
|
||
{
|
||
_dir_list.clear();
|
||
_var_list_table.clear();
|
||
// XXX need to cleanup _{attach,detach,nomatch}_list
|
||
}
|
||
|
||
void
|
||
config::parse_one_file(const char *fn)
|
||
{
|
||
if (dflag)
|
||
printf("Parsing %s\n", fn);
|
||
yyin = fopen(fn, "r");
|
||
if (yyin == NULL)
|
||
err(1, "Cannot open config file %s", fn);
|
||
if (yyparse() != 0)
|
||
errx(1, "Cannot parse %s at line %d", fn, lineno);
|
||
fclose(yyin);
|
||
}
|
||
|
||
void
|
||
config::parse_files_in_dir(const char *dirname)
|
||
{
|
||
DIR *dirp;
|
||
struct dirent *dp;
|
||
char path[PATH_MAX];
|
||
|
||
if (dflag)
|
||
printf("Parsing files in %s\n", dirname);
|
||
dirp = opendir(dirname);
|
||
if (dirp == NULL)
|
||
return;
|
||
readdir(dirp); /* Skip . */
|
||
readdir(dirp); /* Skip .. */
|
||
while ((dp = readdir(dirp)) != NULL) {
|
||
if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) {
|
||
snprintf(path, sizeof(path), "%s/%s",
|
||
dirname, dp->d_name);
|
||
parse_one_file(path);
|
||
}
|
||
}
|
||
}
|
||
|
||
void
|
||
config::parse(void)
|
||
{
|
||
vector<string>::const_iterator i;
|
||
|
||
parse_one_file(CF);
|
||
for (i = _dir_list.begin(); i != _dir_list.end(); i++)
|
||
parse_files_in_dir((*i).c_str());
|
||
}
|
||
|
||
void
|
||
config::drop_pidfile()
|
||
{
|
||
FILE *fp;
|
||
|
||
if (_pidfile == "")
|
||
return;
|
||
fp = fopen(_pidfile.c_str(), "w");
|
||
if (fp == NULL)
|
||
return;
|
||
fprintf(fp, "%d\n", getpid());
|
||
fclose(fp);
|
||
}
|
||
|
||
void
|
||
config::add_attach(int prio, event_proc *p)
|
||
{
|
||
p->set_priority(prio);
|
||
_attach_list.push_back(p);
|
||
}
|
||
|
||
void
|
||
config::add_detach(int prio, event_proc *p)
|
||
{
|
||
p->set_priority(prio);
|
||
_detach_list.push_back(p);
|
||
}
|
||
|
||
void
|
||
config::add_directory(const char *dir)
|
||
{
|
||
_dir_list.push_back(string(dir));
|
||
}
|
||
|
||
void
|
||
config::add_nomatch(int prio, event_proc *p)
|
||
{
|
||
p->set_priority(prio);
|
||
_nomatch_list.push_back(p);
|
||
}
|
||
|
||
void
|
||
config::set_pidfile(const char *fn)
|
||
{
|
||
_pidfile = string(fn);
|
||
}
|
||
|
||
void
|
||
config::push_var_table()
|
||
{
|
||
var_list *vl;
|
||
|
||
vl = new var_list();
|
||
_var_list_table.push_back(vl);
|
||
}
|
||
|
||
void
|
||
config::pop_var_table()
|
||
{
|
||
delete _var_list_table.back();
|
||
_var_list_table.pop_back();
|
||
}
|
||
|
||
void
|
||
config::set_variable(const char *var, const char *val)
|
||
{
|
||
_var_list_table.back()->set_variable(var, val);
|
||
}
|
||
|
||
const string &
|
||
config::get_variable(const string &var)
|
||
{
|
||
vector<var_list *>::reverse_iterator i;
|
||
|
||
for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); i++) {
|
||
if ((*i)->is_set(var))
|
||
return (var);
|
||
}
|
||
return (var_list::nothing);
|
||
}
|
||
|
||
const string &
|
||
config::expand_string(const string &)
|
||
{
|
||
return var_list::bogus;
|
||
}
|
||
|
||
|
||
static void
|
||
process_event(const char *buffer)
|
||
{
|
||
char type;
|
||
char cmd[1024];
|
||
char *sp;
|
||
|
||
// XXX should involve config
|
||
// XXX and set some variables
|
||
// XXX run the list and so forth
|
||
|
||
// Ignore unknown devices for now.
|
||
if (*buffer == '?')
|
||
return;
|
||
type = *buffer++;
|
||
sp = strchr(buffer, ' ');
|
||
if (sp == NULL)
|
||
return; /* Can't happen? */
|
||
*sp = '\0';
|
||
snprintf(cmd, sizeof(cmd), "/etc/devd-generic %s %s", buffer,
|
||
type == '+' ? "start" : "stop");
|
||
if (dflag)
|
||
printf("Trying '%s'\n", cmd);
|
||
system(cmd);
|
||
}
|
||
|
||
static void
|
||
event_loop(void)
|
||
{
|
||
int rv;
|
||
int fd;
|
||
char buffer[DEVCTL_MAXBUF];
|
||
|
||
fd = open(PATH_DEVCTL, O_RDONLY);
|
||
if (fd == -1)
|
||
err(1, "Can't open devctl");
|
||
if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0)
|
||
err(1, "Can't set close-on-exec flag");
|
||
while (1) {
|
||
if (romeo_must_die)
|
||
break;
|
||
rv = read(fd, buffer, sizeof(buffer) - 1);
|
||
if (rv > 0) {
|
||
buffer[rv] = '\0';
|
||
while (buffer[--rv] == '\n')
|
||
buffer[rv] = '\0';
|
||
process_event(buffer);
|
||
} else if (rv < 0) {
|
||
if (errno != EINTR)
|
||
break;
|
||
} else {
|
||
/* EOF */
|
||
break;
|
||
}
|
||
}
|
||
close(fd);
|
||
}
|
||
|
||
/*
|
||
* functions that the parser uses.
|
||
*/
|
||
void
|
||
add_attach(int prio, event_proc *p)
|
||
{
|
||
cfg.add_attach(prio, p);
|
||
}
|
||
|
||
void
|
||
add_detach(int prio, event_proc *p)
|
||
{
|
||
cfg.add_detach(prio, p);
|
||
}
|
||
|
||
void
|
||
add_directory(const char *dir)
|
||
{
|
||
cfg.add_directory(dir);
|
||
free(const_cast<char *>(dir));
|
||
}
|
||
|
||
void
|
||
add_nomatch(int prio, event_proc *p)
|
||
{
|
||
cfg.add_nomatch(prio, p);
|
||
}
|
||
|
||
event_proc *
|
||
add_to_event_proc(event_proc *ep, eps *eps)
|
||
{
|
||
if (ep == NULL)
|
||
ep = new event_proc();
|
||
ep->add(eps);
|
||
return (ep);
|
||
}
|
||
|
||
eps *
|
||
new_action(const char *cmd)
|
||
{
|
||
eps *e = new action(cmd);
|
||
free(const_cast<char *>(cmd));
|
||
return (e);
|
||
}
|
||
|
||
eps *
|
||
new_match(const char *var, const char *re)
|
||
{
|
||
eps *e = new match(var, re);
|
||
free(const_cast<char *>(var));
|
||
free(const_cast<char *>(re));
|
||
return (e);
|
||
}
|
||
|
||
void
|
||
set_pidfile(const char *name)
|
||
{
|
||
cfg.set_pidfile(name);
|
||
free(const_cast<char *>(name));
|
||
}
|
||
|
||
void
|
||
set_variable(const char *var, const char *val)
|
||
{
|
||
cfg.set_variable(var, val);
|
||
free(const_cast<char *>(var));
|
||
free(const_cast<char *>(val));
|
||
}
|
||
|
||
|
||
|
||
static void
|
||
gensighand(int)
|
||
{
|
||
romeo_must_die++;
|
||
_exit(0);
|
||
}
|
||
|
||
static void
|
||
usage()
|
||
{
|
||
fprintf(stderr, "usage: %s [-d]", getprogname());
|
||
exit(1);
|
||
}
|
||
|
||
/*
|
||
* main
|
||
*/
|
||
int
|
||
main(int argc, char **argv)
|
||
{
|
||
int ch;
|
||
|
||
while ((ch = getopt(argc, argv, "d")) != -1) {
|
||
switch (ch) {
|
||
case 'd':
|
||
dflag++;
|
||
break;
|
||
default:
|
||
usage();
|
||
}
|
||
}
|
||
|
||
cfg.parse();
|
||
if (!dflag)
|
||
daemon(0, 0);
|
||
cfg.drop_pidfile();
|
||
signal(SIGHUP, gensighand);
|
||
signal(SIGINT, gensighand);
|
||
signal(SIGTERM, gensighand);
|
||
event_loop();
|
||
return (0);
|
||
}
|