2 * Copyright (c) 2002-2003 M. Warner Losh.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/sbin/devd/devd.cc,v 1.33 2006/09/17 22:49:26 ru Exp $
27 * $DragonFly: src/sbin/devd/devd.cc,v 1.1 2008/10/03 00:26:21 hasso Exp $
31 * DEVD control daemon.
35 // o devd.conf and devd man pages need a lot of help:
36 // - devd needs to document the unix domain socket
37 // - devd.conf needs more details on the supported statements.
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <sys/sysctl.h>
43 #include <sys/types.h>
65 #include "devd.h" /* C compatible definitions */
66 #include "devd.hh" /* C++ class definitions */
68 #define PIPE "/var/run/devd.pipe"
69 #define CF "/etc/devd.conf"
70 #define SYSCTL "hw.bus.devctl_disable"
77 static const char notify = '!';
78 static const char nomatch = '?';
79 static const char attach = '+';
80 static const char detach = '-';
85 static volatile sig_atomic_t romeo_must_die = 0;
87 static const char *configfile = CF;
89 static void event_loop(void);
90 static void usage(void);
92 template <class T> void
93 delete_and_clear(vector<T *> &v)
95 typename vector<T *>::const_iterator i;
97 for (i = v.begin(); i != v.end(); ++i)
104 event_proc::event_proc() : _prio(-1)
109 event_proc::~event_proc()
111 delete_and_clear(_epsvec);
115 event_proc::add(eps *eps)
117 _epsvec.push_back(eps);
121 event_proc::matches(config &c)
123 vector<eps *>::const_iterator i;
125 for (i = _epsvec.begin(); i != _epsvec.end(); ++i)
126 if (!(*i)->do_match(c))
132 event_proc::run(config &c)
134 vector<eps *>::const_iterator i;
136 for (i = _epsvec.begin(); i != _epsvec.end(); ++i)
137 if (!(*i)->do_action(c))
142 action::action(const char *cmd)
154 action::do_action(config &c)
156 string s = c.expand_string(_cmd);
158 fprintf(stderr, "Executing '%s'\n", s.c_str());
163 match::match(config &c, const char *var, const char *re)
164 : _var(var), _re("^")
166 _re.append(c.expand_string(string(re)));
168 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB | REG_ICASE);
177 match::do_match(config &c)
179 string value = c.get_variable(_var);
183 fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(),
184 value.c_str(), _re.c_str());
186 retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0);
190 #include <sys/sockio.h>
192 #include <net/if_media.h>
194 media::media(config &, const char *var, const char *type)
195 : _var(var), _type(-1)
197 static struct ifmedia_description media_types[] = {
198 { IFM_ETHER, "Ethernet" },
199 { IFM_IEEE80211, "802.11" },
201 { IFM_CARP, "CARP" },
205 for (int i = 0; media_types[i].ifmt_string != NULL; i++)
206 if (strcasecmp(type, media_types[i].ifmt_string) == 0) {
207 _type = media_types[i].ifmt_word;
217 media::do_match(config &c)
220 struct ifmediareq ifmr;
224 // Since we can be called from both a device attach/detach
225 // context where device-name is defined and what we want,
226 // as well as from a link status context, where subsystem is
227 // the name of interest, first try device-name and fall back
228 // to subsystem if none exists.
229 value = c.get_variable("device-name");
231 value = c.get_variable("subsystem");
233 fprintf(stderr, "Testing media type of %s against 0x%x\n",
234 value.c_str(), _type);
238 s = socket(PF_INET, SOCK_DGRAM, 0);
240 memset(&ifmr, 0, sizeof(ifmr));
241 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name));
243 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 &&
244 ifmr.ifm_status & IFM_AVALID) {
246 fprintf(stderr, "%s has media type 0x%x\n",
247 value.c_str(), IFM_TYPE(ifmr.ifm_active));
248 retval = (IFM_TYPE(ifmr.ifm_active) == _type);
249 } else if (_type == -1) {
251 fprintf(stderr, "%s has unknown media type\n",
261 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_";
262 const string var_list::nothing = "";
265 var_list::get_variable(const string &var) const
267 map<string, string>::const_iterator i;
270 if (i == _vars.end())
271 return (var_list::bogus);
276 var_list::is_set(const string &var) const
278 return (_vars.find(var) != _vars.end());
282 var_list::set_variable(const string &var, const string &val)
285 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str());
293 delete_and_clear(_var_list_table);
294 delete_and_clear(_attach_list);
295 delete_and_clear(_detach_list);
296 delete_and_clear(_nomatch_list);
297 delete_and_clear(_notify_list);
301 config::parse_one_file(const char *fn)
304 printf("Parsing %s\n", fn);
305 yyin = fopen(fn, "r");
307 err(1, "Cannot open config file %s", fn);
310 errx(1, "Cannot parse %s at line %d", fn, lineno);
315 config::parse_files_in_dir(const char *dirname)
322 printf("Parsing files in %s\n", dirname);
323 dirp = opendir(dirname);
326 readdir(dirp); /* Skip . */
327 readdir(dirp); /* Skip .. */
328 while ((dp = readdir(dirp)) != NULL) {
329 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) {
330 snprintf(path, sizeof(path), "%s/%s",
331 dirname, dp->d_name);
332 parse_one_file(path);
339 int operator()(event_proc *const&l1, event_proc *const&l2)
341 return (l1->get_priority() > l2->get_priority());
346 config::sort_vector(vector<event_proc *> &v)
348 sort(v.begin(), v.end(), epv_greater());
354 vector<string>::const_iterator i;
356 parse_one_file(configfile);
357 for (i = _dir_list.begin(); i != _dir_list.end(); ++i)
358 parse_files_in_dir((*i).c_str());
359 sort_vector(_attach_list);
360 sort_vector(_detach_list);
361 sort_vector(_nomatch_list);
362 sort_vector(_notify_list);
366 config::open_pidfile()
369 errx(1, "devd already running");
373 config::add_attach(int prio, event_proc *p)
375 p->set_priority(prio);
376 _attach_list.push_back(p);
380 config::add_detach(int prio, event_proc *p)
382 p->set_priority(prio);
383 _detach_list.push_back(p);
387 config::add_directory(const char *dir)
389 _dir_list.push_back(string(dir));
393 config::add_nomatch(int prio, event_proc *p)
395 p->set_priority(prio);
396 _nomatch_list.push_back(p);
400 config::add_notify(int prio, event_proc *p)
402 p->set_priority(prio);
403 _notify_list.push_back(p);
407 config::set_pidfile(const char *fn)
409 _pidfile = string(fn);
413 config::push_var_table()
418 _var_list_table.push_back(vl);
420 fprintf(stderr, "Pushing table\n");
424 config::pop_var_table()
426 delete _var_list_table.back();
427 _var_list_table.pop_back();
429 fprintf(stderr, "Popping table\n");
433 config::set_variable(const char *var, const char *val)
435 _var_list_table.back()->set_variable(var, val);
439 config::get_variable(const string &var)
441 vector<var_list *>::reverse_iterator i;
443 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); ++i) {
444 if ((*i)->is_set(var))
445 return ((*i)->get_variable(var));
447 return (var_list::nothing);
451 config::is_id_char(char ch) const
453 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' ||
458 config::expand_one(const char *&src, string &dst)
461 string buffer, varstr;
471 // Not sure if I want to support this or not, so for now we just pass
476 /* If the string ends before ) is matched , return. */
477 while (count > 0 && *src) {
480 else if (*src == '(')
488 if (!isalpha(*src)) {
494 // $var -> replace with value
497 } while (is_id_char(*src));
498 buffer.append("", 1);
499 varstr = get_variable(buffer.c_str());
504 config::expand_string(const string &s)
512 expand_one(src, dst);
514 dst.append(src++, 1);
522 config::chop_var(char *&buffer, char *&lhs, char *&rhs) const
528 walker = lhs = buffer;
529 while (is_id_char(*walker))
534 if (*walker == '"') {
537 while (*walker && *walker != '"')
545 while (*walker && !isspace(*walker))
551 while (isspace(*walker))
559 config::set_vars(char *buffer)
565 if (!chop_var(buffer, lhs, rhs))
567 set_variable(lhs, rhs);
573 config::find_and_execute(char type)
575 vector<event_proc *> *l;
576 vector<event_proc *>::const_iterator i;
600 fprintf(stderr, "Processing %s event\n", s);
601 for (i = l->begin(); i != l->end(); ++i) {
602 if ((*i)->matches(*this)) {
612 process_event(char *buffer)
619 fprintf(stderr, "Processing event '%s'\n", buffer);
621 cfg.push_var_table();
622 // No match doesn't have a device, and the format is a little
623 // different, so handle it separately.
626 sp = cfg.set_vars(sp);
629 //? at location pnp-info on bus
630 sp = strchr(sp, ' ');
632 return; /* Can't happen? */
634 if (strncmp(sp, "at ", 3) == 0)
636 sp = cfg.set_vars(sp);
637 if (strncmp(sp, "on ", 3) == 0)
638 cfg.set_variable("bus", sp + 3);
640 case attach: /*FALLTHROUGH*/
642 sp = strchr(sp, ' ');
644 return; /* Can't happen? */
646 cfg.set_variable("device-name", buffer);
647 if (strncmp(sp, "at ", 3) == 0)
649 sp = cfg.set_vars(sp);
650 if (strncmp(sp, "on ", 3) == 0)
651 cfg.set_variable("bus", sp + 3);
655 cfg.find_and_execute(type);
660 create_socket(const char *name)
663 struct sockaddr_un sun;
665 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0)
667 bzero(&sun, sizeof(sun));
668 sun.sun_family = AF_UNIX;
669 strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
670 slen = SUN_LEN(&sun);
672 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
674 if (bind(fd, (struct sockaddr *) & sun, slen) < 0)
677 chown(name, 0, 0); /* XXX - root.wheel */
685 notify_clients(const char *data, int len)
688 list<int>::const_iterator i;
690 for (i = clients.begin(); i != clients.end(); ++i) {
691 if (write(*i, data, len) <= 0) {
697 for (i = bad.begin(); i != bad.end(); ++i)
698 clients.erase(find(clients.begin(), clients.end(), *i));
706 s = accept(fd, NULL, NULL);
708 clients.push_back(s);
716 char buffer[DEVCTL_MAXBUF];
718 int server_fd, max_fd;
722 fd = open(PATH_DEVCTL, O_RDONLY);
724 err(1, "Can't open devctl device %s", PATH_DEVCTL);
725 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0)
726 err(1, "Can't set close-on-exec flag on devctl");
727 server_fd = create_socket(PIPE);
728 max_fd = max(fd, server_fd) + 1;
732 if (!once && !dflag && !nflag) {
733 // Check to see if we have any events pending.
738 rv = select(fd + 1, &fds, NULL, NULL, &tv);
739 // No events -> we've processed all pending events
742 fprintf(stderr, "Calling daemon\n");
750 FD_SET(server_fd, &fds);
751 rv = select(max_fd, &fds, NULL, NULL, NULL);
757 if (FD_ISSET(fd, &fds)) {
758 rv = read(fd, buffer, sizeof(buffer) - 1);
760 notify_clients(buffer, rv);
762 while (buffer[--rv] == '\n')
764 process_event(buffer);
773 if (FD_ISSET(server_fd, &fds))
774 new_client(server_fd);
780 * functions that the parser uses.
783 add_attach(int prio, event_proc *p)
785 cfg.add_attach(prio, p);
789 add_detach(int prio, event_proc *p)
791 cfg.add_detach(prio, p);
795 add_directory(const char *dir)
797 cfg.add_directory(dir);
798 free(const_cast<char *>(dir));
802 add_nomatch(int prio, event_proc *p)
804 cfg.add_nomatch(prio, p);
808 add_notify(int prio, event_proc *p)
810 cfg.add_notify(prio, p);
814 add_to_event_proc(event_proc *ep, eps *eps)
817 ep = new event_proc();
823 new_action(const char *cmd)
825 eps *e = new action(cmd);
826 free(const_cast<char *>(cmd));
831 new_match(const char *var, const char *re)
833 eps *e = new match(cfg, var, re);
834 free(const_cast<char *>(var));
835 free(const_cast<char *>(re));
840 new_media(const char *var, const char *re)
842 eps *e = new media(cfg, var, re);
843 free(const_cast<char *>(var));
844 free(const_cast<char *>(re));
849 set_pidfile(const char *name)
851 cfg.set_pidfile(name);
852 free(const_cast<char *>(name));
856 set_variable(const char *var, const char *val)
858 cfg.set_variable(var, val);
859 free(const_cast<char *>(var));
860 free(const_cast<char *>(val));
869 unlink("/var/run/devd.pid"); /* XXX */
875 fprintf(stderr, "usage: %s [-Ddn] [-f file]\n", getprogname());
886 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0)
887 errx(1, "devctl sysctl missing from kernel!");
889 warnx("Setting " SYSCTL " to 0");
891 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val));
899 main(int argc, char **argv)
903 check_devd_enabled();
904 while ((ch = getopt(argc, argv, "Ddf:n")) != -1) {
924 if (!dflag && nflag) {
926 fprintf(stderr, "Calling daemon\n");
930 signal(SIGPIPE, SIG_IGN);
931 signal(SIGHUP, gensighand);
932 signal(SIGINT, gensighand);
933 signal(SIGTERM, gensighand);