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
28 * DEVD control daemon.
32 // o devd.conf and devd man pages need a lot of help:
33 // - devd needs to document the unix domain socket
34 // - devd.conf needs more details on the supported statements.
36 #include <sys/cdefs.h>
37 __FBSDID("$FreeBSD$");
39 #include <sys/param.h>
40 #include <sys/socket.h>
42 #include <sys/sysctl.h>
43 #include <sys/types.h>
64 #include "devd.h" /* C compatible definitions */
65 #include "devd.hh" /* C++ class definitions */
67 #define PIPE "/var/run/devd.pipe"
68 #define CF "/etc/devd.conf"
69 #define SYSCTL "hw.bus.devctl_disable"
76 static const char notify = '!';
77 static const char nomatch = '?';
78 static const char attach = '+';
79 static const char detach = '-';
84 int romeo_must_die = 0;
86 static const char *configfile = CF;
88 static void event_loop(void);
89 static void usage(void);
91 template <class T> void
92 delete_and_clear(vector<T *> &v)
94 typename vector<T *>::const_iterator i;
96 for (i = v.begin(); i != v.end(); i++)
103 event_proc::event_proc() : _prio(-1)
108 event_proc::~event_proc()
110 delete_and_clear(_epsvec);
114 event_proc::add(eps *eps)
116 _epsvec.push_back(eps);
120 event_proc::matches(config &c)
122 vector<eps *>::const_iterator i;
124 for (i = _epsvec.begin(); i != _epsvec.end(); i++)
125 if (!(*i)->do_match(c))
131 event_proc::run(config &c)
133 vector<eps *>::const_iterator i;
135 for (i = _epsvec.begin(); i != _epsvec.end(); i++)
136 if (!(*i)->do_action(c))
141 action::action(const char *cmd)
153 action::do_action(config &c)
155 string s = c.expand_string(_cmd);
157 fprintf(stderr, "Executing '%s'\n", s.c_str());
162 match::match(config &c, const char *var, const char *re)
167 _re.append(c.expand_string(string(re)));
169 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB);
178 match::do_match(config &c)
180 string value = c.get_variable(_var);
184 fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(),
185 value.c_str(), _re.c_str());
187 retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0);
191 #include <sys/sockio.h>
193 #include <net/if_media.h>
195 media::media(config &, const char *var, const char *type)
196 : _var(var), _type(-1)
198 static struct ifmedia_description media_types[] = {
199 { IFM_ETHER, "Ethernet" },
200 { IFM_TOKEN, "Tokenring" },
201 { IFM_FDDI, "FDDI" },
202 { IFM_IEEE80211, "802.11" },
204 { IFM_CARP, "CARP" },
208 for (int i = 0; media_types[i].ifmt_string != NULL; i++)
209 if (strcasecmp(type, media_types[i].ifmt_string) == 0) {
210 _type = media_types[i].ifmt_word;
220 media::do_match(config &c)
223 struct ifmediareq ifmr;
227 // Since we can be called from both a device attach/detach
228 // context where device-name is defined and what we want,
229 // as well as from a link status context, where subsystem is
230 // the name of interest, first try device-name and fall back
231 // to subsystem if none exists.
232 value = c.get_variable("device-name");
233 if (value.length() == 0)
234 value = c.get_variable("subsystem");
236 fprintf(stderr, "Testing media type of %s against 0x%x\n",
237 value.c_str(), _type);
241 s = socket(PF_INET, SOCK_DGRAM, 0);
243 memset(&ifmr, 0, sizeof(ifmr));
244 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name));
246 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 &&
247 ifmr.ifm_status & IFM_AVALID) {
249 fprintf(stderr, "%s has media type 0x%x\n",
250 value.c_str(), IFM_TYPE(ifmr.ifm_active));
251 retval = (IFM_TYPE(ifmr.ifm_active) == _type);
252 } else if (_type == -1) {
254 fprintf(stderr, "%s has unknown media type\n",
264 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_";
265 const string var_list::nothing = "";
268 var_list::get_variable(const string &var) const
270 map<string, string>::const_iterator i;
273 if (i == _vars.end())
274 return (var_list::bogus);
279 var_list::is_set(const string &var) const
281 return (_vars.find(var) != _vars.end());
285 var_list::set_variable(const string &var, const string &val)
288 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str());
296 delete_and_clear(_var_list_table);
297 delete_and_clear(_attach_list);
298 delete_and_clear(_detach_list);
299 delete_and_clear(_nomatch_list);
300 delete_and_clear(_notify_list);
304 config::parse_one_file(const char *fn)
307 printf("Parsing %s\n", fn);
308 yyin = fopen(fn, "r");
310 err(1, "Cannot open config file %s", fn);
312 errx(1, "Cannot parse %s at line %d", fn, lineno);
317 config::parse_files_in_dir(const char *dirname)
324 printf("Parsing files in %s\n", dirname);
325 dirp = opendir(dirname);
328 readdir(dirp); /* Skip . */
329 readdir(dirp); /* Skip .. */
330 while ((dp = readdir(dirp)) != NULL) {
331 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) {
332 snprintf(path, sizeof(path), "%s/%s",
333 dirname, dp->d_name);
334 parse_one_file(path);
341 int operator()(event_proc *const&l1, event_proc *const&l2)
343 return (l1->get_priority() > l2->get_priority());
348 config::sort_vector(vector<event_proc *> &v)
350 sort(v.begin(), v.end(), epv_greater());
356 vector<string>::const_iterator i;
358 parse_one_file(configfile);
359 for (i = _dir_list.begin(); i != _dir_list.end(); i++)
360 parse_files_in_dir((*i).c_str());
361 sort_vector(_attach_list);
362 sort_vector(_detach_list);
363 sort_vector(_nomatch_list);
364 sort_vector(_notify_list);
368 config::drop_pidfile()
374 fp = fopen(_pidfile.c_str(), "w");
377 fprintf(fp, "%d\n", getpid());
382 config::add_attach(int prio, event_proc *p)
384 p->set_priority(prio);
385 _attach_list.push_back(p);
389 config::add_detach(int prio, event_proc *p)
391 p->set_priority(prio);
392 _detach_list.push_back(p);
396 config::add_directory(const char *dir)
398 _dir_list.push_back(string(dir));
402 config::add_nomatch(int prio, event_proc *p)
404 p->set_priority(prio);
405 _nomatch_list.push_back(p);
409 config::add_notify(int prio, event_proc *p)
411 p->set_priority(prio);
412 _notify_list.push_back(p);
416 config::set_pidfile(const char *fn)
418 _pidfile = string(fn);
422 config::push_var_table()
427 _var_list_table.push_back(vl);
429 fprintf(stderr, "Pushing table\n");
433 config::pop_var_table()
435 delete _var_list_table.back();
436 _var_list_table.pop_back();
438 fprintf(stderr, "Popping table\n");
442 config::set_variable(const char *var, const char *val)
444 _var_list_table.back()->set_variable(var, val);
448 config::get_variable(const string &var)
450 vector<var_list *>::reverse_iterator i;
452 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); i++) {
453 if ((*i)->is_set(var))
454 return ((*i)->get_variable(var));
456 return (var_list::nothing);
460 config::is_id_char(char ch)
462 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' ||
467 config::expand_one(const char *&src, string &dst)
470 string buffer, varstr;
475 dst.append(src++, 1);
480 // Not sure if I want to support this or not, so for now we just pass
485 /* If the string ends before ) is matched , return. */
486 while (count > 0 && *src) {
489 else if (*src == '(')
491 dst.append(src++, 1);
497 if (!isalpha(*src)) {
499 dst.append(src++, 1);
503 // $var -> replace with value
505 buffer.append(src++, 1);
506 } while (is_id_char(*src));
507 buffer.append("", 1);
508 varstr = get_variable(buffer.c_str());
513 config::expand_string(const string &s)
521 expand_one(src, dst);
523 dst.append(src++, 1);
531 config::chop_var(char *&buffer, char *&lhs, char *&rhs)
537 walker = lhs = buffer;
538 while (is_id_char(*walker))
543 if (*walker == '"') {
546 while (*walker && *walker != '"')
554 while (*walker && !isspace(*walker))
560 while (isspace(*walker))
568 config::set_vars(char *buffer)
574 if (!chop_var(buffer, lhs, rhs))
576 set_variable(lhs, rhs);
582 config::find_and_execute(char type)
584 vector<event_proc *> *l;
585 vector<event_proc *>::const_iterator i;
609 fprintf(stderr, "Processing %s event\n", s);
610 for (i = l->begin(); i != l->end(); i++) {
611 if ((*i)->matches(*this)) {
621 process_event(char *buffer)
628 fprintf(stderr, "Processing event '%s'\n", buffer);
630 cfg.push_var_table();
631 // No match doesn't have a device, and the format is a little
632 // different, so handle it separately.
635 sp = cfg.set_vars(sp);
638 //? at location pnp-info on bus
639 sp = strchr(sp, ' ');
641 return; /* Can't happen? */
643 if (strncmp(sp, "at ", 3) == 0)
645 sp = cfg.set_vars(sp);
646 if (strncmp(sp, "on ", 3) == 0)
647 cfg.set_variable("bus", sp + 3);
649 case attach: /*FALLTHROUGH*/
651 sp = strchr(sp, ' ');
653 return; /* Can't happen? */
655 cfg.set_variable("device-name", buffer);
656 if (strncmp(sp, "at ", 3) == 0)
658 sp = cfg.set_vars(sp);
659 if (strncmp(sp, "on ", 3) == 0)
660 cfg.set_variable("bus", sp + 3);
664 cfg.find_and_execute(type);
669 create_socket(const char *name)
672 struct sockaddr_un sun;
674 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0)
676 bzero(&sun, sizeof(sun));
677 sun.sun_family = AF_UNIX;
678 strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
679 slen = SUN_LEN(&sun);
681 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
683 if (bind(fd, (struct sockaddr *) & sun, slen) < 0)
686 chown(name, 0, 0); /* XXX - root.wheel */
694 notify_clients(const char *data, int len)
697 list<int>::const_iterator i;
699 for (i = clients.begin(); i != clients.end(); i++) {
700 if (write(*i, data, len) <= 0) {
706 for (i = bad.begin(); i != bad.end(); i++)
707 clients.erase(find(clients.begin(), clients.end(), *i));
715 s = accept(fd, NULL, NULL);
717 clients.push_back(s);
725 char buffer[DEVCTL_MAXBUF];
727 int server_fd, max_fd;
731 fd = open(PATH_DEVCTL, O_RDONLY);
733 err(1, "Can't open devctl device %s", PATH_DEVCTL);
734 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0)
735 err(1, "Can't set close-on-exec flag on devctl");
736 server_fd = create_socket(PIPE);
737 max_fd = max(fd, server_fd) + 1;
741 if (!once && !dflag && !nflag) {
742 // Check to see if we have any events pending.
747 rv = select(fd + 1, &fds, &fds, &fds, &tv);
748 // No events -> we've processed all pending events
751 fprintf(stderr, "Calling daemon\n");
759 FD_SET(server_fd, &fds);
760 rv = select(max_fd, &fds, NULL, NULL, NULL);
766 if (FD_ISSET(fd, &fds)) {
767 rv = read(fd, buffer, sizeof(buffer) - 1);
769 notify_clients(buffer, rv);
771 while (buffer[--rv] == '\n')
773 process_event(buffer);
782 if (FD_ISSET(server_fd, &fds))
783 new_client(server_fd);
789 * functions that the parser uses.
792 add_attach(int prio, event_proc *p)
794 cfg.add_attach(prio, p);
798 add_detach(int prio, event_proc *p)
800 cfg.add_detach(prio, p);
804 add_directory(const char *dir)
806 cfg.add_directory(dir);
807 free(const_cast<char *>(dir));
811 add_nomatch(int prio, event_proc *p)
813 cfg.add_nomatch(prio, p);
817 add_notify(int prio, event_proc *p)
819 cfg.add_notify(prio, p);
823 add_to_event_proc(event_proc *ep, eps *eps)
826 ep = new event_proc();
832 new_action(const char *cmd)
834 eps *e = new action(cmd);
835 free(const_cast<char *>(cmd));
840 new_match(const char *var, const char *re)
842 eps *e = new match(cfg, var, re);
843 free(const_cast<char *>(var));
844 free(const_cast<char *>(re));
849 new_media(const char *var, const char *re)
851 eps *e = new media(cfg, var, re);
852 free(const_cast<char *>(var));
853 free(const_cast<char *>(re));
858 set_pidfile(const char *name)
860 cfg.set_pidfile(name);
861 free(const_cast<char *>(name));
865 set_variable(const char *var, const char *val)
867 cfg.set_variable(var, val);
868 free(const_cast<char *>(var));
869 free(const_cast<char *>(val));
884 fprintf(stderr, "usage: %s [-Ddn]\n", getprogname());
895 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0)
896 errx(1, "devctl sysctl missing from kernel!");
898 warnx("Setting " SYSCTL " to 0");
900 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val));
908 main(int argc, char **argv)
912 check_devd_enabled();
913 while ((ch = getopt(argc, argv, "Ddf:n")) != -1) {
933 if (!dflag && nflag) {
937 signal(SIGPIPE, SIG_IGN);
938 signal(SIGHUP, gensighand);
939 signal(SIGINT, gensighand);
940 signal(SIGTERM, gensighand);