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>
66 #include "devd.h" /* C compatible definitions */
67 #include "devd.hh" /* C++ class definitions */
69 #define PIPE "/var/run/devd.pipe"
70 #define CF "/etc/devd.conf"
71 #define SYSCTL "hw.bus.devctl_disable"
78 static const char notify = '!';
79 static const char nomatch = '?';
80 static const char attach = '+';
81 static const char detach = '-';
86 static volatile sig_atomic_t romeo_must_die = 0;
88 static const char *configfile = CF;
90 static void event_loop(void);
91 static void usage(void);
93 template <class T> void
94 delete_and_clear(vector<T *> &v)
96 typename vector<T *>::const_iterator i;
98 for (i = v.begin(); i != v.end(); ++i)
105 event_proc::event_proc() : _prio(-1)
110 event_proc::~event_proc()
112 delete_and_clear(_epsvec);
116 event_proc::add(eps *eps)
118 _epsvec.push_back(eps);
122 event_proc::matches(config &c)
124 vector<eps *>::const_iterator i;
126 for (i = _epsvec.begin(); i != _epsvec.end(); ++i)
127 if (!(*i)->do_match(c))
133 event_proc::run(config &c)
135 vector<eps *>::const_iterator i;
137 for (i = _epsvec.begin(); i != _epsvec.end(); ++i)
138 if (!(*i)->do_action(c))
143 action::action(const char *cmd)
155 action::do_action(config &c)
157 string s = c.expand_string(_cmd);
159 fprintf(stderr, "Executing '%s'\n", s.c_str());
164 match::match(config &c, const char *var, const char *re)
165 : _var(var), _re("^")
167 _re.append(c.expand_string(string(re)));
169 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB | REG_ICASE);
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_IEEE80211, "802.11" },
202 { IFM_CARP, "CARP" },
206 for (int i = 0; media_types[i].ifmt_string != NULL; i++)
207 if (strcasecmp(type, media_types[i].ifmt_string) == 0) {
208 _type = media_types[i].ifmt_word;
218 media::do_match(config &c)
221 struct ifmediareq ifmr;
225 // Since we can be called from both a device attach/detach
226 // context where device-name is defined and what we want,
227 // as well as from a link status context, where subsystem is
228 // the name of interest, first try device-name and fall back
229 // to subsystem if none exists.
230 value = c.get_variable("device-name");
232 value = c.get_variable("subsystem");
234 fprintf(stderr, "Testing media type of %s against 0x%x\n",
235 value.c_str(), _type);
239 s = socket(PF_INET, SOCK_DGRAM, 0);
241 memset(&ifmr, 0, sizeof(ifmr));
242 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name));
244 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 &&
245 ifmr.ifm_status & IFM_AVALID) {
247 fprintf(stderr, "%s has media type 0x%x\n",
248 value.c_str(), IFM_TYPE(ifmr.ifm_active));
249 retval = (IFM_TYPE(ifmr.ifm_active) == _type);
250 } else if (_type == -1) {
252 fprintf(stderr, "%s has unknown media type\n",
262 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_";
263 const string var_list::nothing = "";
266 var_list::get_variable(const string &var) const
268 map<string, string>::const_iterator i;
271 if (i == _vars.end())
272 return (var_list::bogus);
277 var_list::is_set(const string &var) const
279 return (_vars.find(var) != _vars.end());
283 var_list::set_variable(const string &var, const string &val)
286 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str());
294 delete_and_clear(_var_list_table);
295 delete_and_clear(_attach_list);
296 delete_and_clear(_detach_list);
297 delete_and_clear(_nomatch_list);
298 delete_and_clear(_notify_list);
302 config::parse_one_file(const char *fn)
305 printf("Parsing %s\n", fn);
306 yyin = fopen(fn, "r");
308 err(1, "Cannot open config file %s", fn);
311 errx(1, "Cannot parse %s at line %d", fn, lineno);
316 config::parse_files_in_dir(const char *dirname)
323 printf("Parsing files in %s\n", dirname);
324 dirp = opendir(dirname);
327 readdir(dirp); /* Skip . */
328 readdir(dirp); /* Skip .. */
329 while ((dp = readdir(dirp)) != NULL) {
330 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) {
331 snprintf(path, sizeof(path), "%s/%s",
332 dirname, dp->d_name);
333 parse_one_file(path);
340 int operator()(event_proc *const&l1, event_proc *const&l2)
342 return (l1->get_priority() > l2->get_priority());
347 config::sort_vector(vector<event_proc *> &v)
349 sort(v.begin(), v.end(), epv_greater());
355 vector<string>::const_iterator i;
357 parse_one_file(configfile);
358 for (i = _dir_list.begin(); i != _dir_list.end(); ++i)
359 parse_files_in_dir((*i).c_str());
360 sort_vector(_attach_list);
361 sort_vector(_detach_list);
362 sort_vector(_nomatch_list);
363 sort_vector(_notify_list);
367 config::open_pidfile()
370 errx(1, "devd already running");
374 config::add_attach(int prio, event_proc *p)
376 p->set_priority(prio);
377 _attach_list.push_back(p);
381 config::add_detach(int prio, event_proc *p)
383 p->set_priority(prio);
384 _detach_list.push_back(p);
388 config::add_directory(const char *dir)
390 _dir_list.push_back(string(dir));
394 config::add_nomatch(int prio, event_proc *p)
396 p->set_priority(prio);
397 _nomatch_list.push_back(p);
401 config::add_notify(int prio, event_proc *p)
403 p->set_priority(prio);
404 _notify_list.push_back(p);
408 config::set_pidfile(const char *fn)
410 _pidfile = string(fn);
414 config::push_var_table()
419 _var_list_table.push_back(vl);
421 fprintf(stderr, "Pushing table\n");
425 config::pop_var_table()
427 delete _var_list_table.back();
428 _var_list_table.pop_back();
430 fprintf(stderr, "Popping table\n");
434 config::set_variable(const char *var, const char *val)
436 _var_list_table.back()->set_variable(var, val);
440 config::get_variable(const string &var)
442 vector<var_list *>::reverse_iterator i;
444 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); ++i) {
445 if ((*i)->is_set(var))
446 return ((*i)->get_variable(var));
448 return (var_list::nothing);
452 config::is_id_char(char ch) const
454 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' ||
459 config::expand_one(const char *&src, string &dst)
462 string buffer, varstr;
472 // Not sure if I want to support this or not, so for now we just pass
477 /* If the string ends before ) is matched , return. */
478 while (count > 0 && *src) {
481 else if (*src == '(')
489 if (!isalpha(*src)) {
495 // $var -> replace with value
498 } while (is_id_char(*src));
499 buffer.append("", 1);
500 varstr = get_variable(buffer.c_str());
505 config::expand_string(const string &s)
513 expand_one(src, dst);
515 dst.append(src++, 1);
523 config::chop_var(char *&buffer, char *&lhs, char *&rhs) const
529 walker = lhs = buffer;
530 while (is_id_char(*walker))
535 if (*walker == '"') {
538 while (*walker && *walker != '"')
546 while (*walker && !isspace(*walker))
552 while (isspace(*walker))
560 config::set_vars(char *buffer)
566 if (!chop_var(buffer, lhs, rhs))
568 set_variable(lhs, rhs);
574 config::find_and_execute(char type)
576 vector<event_proc *> *l;
577 vector<event_proc *>::const_iterator i;
601 fprintf(stderr, "Processing %s event\n", s);
602 for (i = l->begin(); i != l->end(); ++i) {
603 if ((*i)->matches(*this)) {
613 process_event(char *buffer)
620 fprintf(stderr, "Processing event '%s'\n", buffer);
622 cfg.push_var_table();
623 // No match doesn't have a device, and the format is a little
624 // different, so handle it separately.
627 sp = cfg.set_vars(sp);
630 //? at location pnp-info on bus
631 sp = strchr(sp, ' ');
633 return; /* Can't happen? */
635 if (strncmp(sp, "at ", 3) == 0)
637 sp = cfg.set_vars(sp);
638 if (strncmp(sp, "on ", 3) == 0)
639 cfg.set_variable("bus", sp + 3);
641 case attach: /*FALLTHROUGH*/
643 sp = strchr(sp, ' ');
645 return; /* Can't happen? */
647 cfg.set_variable("device-name", buffer);
648 if (strncmp(sp, "at ", 3) == 0)
650 sp = cfg.set_vars(sp);
651 if (strncmp(sp, "on ", 3) == 0)
652 cfg.set_variable("bus", sp + 3);
656 cfg.find_and_execute(type);
661 create_socket(const char *name)
664 struct sockaddr_un sun;
666 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0)
668 bzero(&sun, sizeof(sun));
669 sun.sun_family = AF_UNIX;
670 strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
671 slen = SUN_LEN(&sun);
673 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
675 if (bind(fd, (struct sockaddr *) & sun, slen) < 0)
678 chown(name, 0, 0); /* XXX - root.wheel */
686 notify_clients(const char *data, int len)
689 list<int>::const_iterator i;
691 for (i = clients.begin(); i != clients.end(); ++i) {
692 if (write(*i, data, len) <= 0) {
698 for (i = bad.begin(); i != bad.end(); ++i)
699 clients.erase(find(clients.begin(), clients.end(), *i));
707 s = accept(fd, NULL, NULL);
709 clients.push_back(s);
717 char buffer[DEVCTL_MAXBUF];
719 int server_fd, max_fd;
723 fd = open(PATH_DEVCTL, O_RDONLY);
725 err(1, "Can't open devctl device %s", PATH_DEVCTL);
726 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0)
727 err(1, "Can't set close-on-exec flag on devctl");
728 server_fd = create_socket(PIPE);
729 max_fd = max(fd, server_fd) + 1;
733 if (!once && !dflag && !nflag) {
734 // Check to see if we have any events pending.
739 rv = select(fd + 1, &fds, NULL, NULL, &tv);
740 // No events -> we've processed all pending events
743 fprintf(stderr, "Calling daemon\n");
751 FD_SET(server_fd, &fds);
752 rv = select(max_fd, &fds, NULL, NULL, NULL);
758 if (FD_ISSET(fd, &fds)) {
759 rv = read(fd, buffer, sizeof(buffer) - 1);
761 notify_clients(buffer, rv);
763 while (buffer[--rv] == '\n')
765 process_event(buffer);
774 if (FD_ISSET(server_fd, &fds))
775 new_client(server_fd);
781 * functions that the parser uses.
784 add_attach(int prio, event_proc *p)
786 cfg.add_attach(prio, p);
790 add_detach(int prio, event_proc *p)
792 cfg.add_detach(prio, p);
796 add_directory(const char *dir)
798 cfg.add_directory(dir);
799 free(const_cast<char *>(dir));
803 add_nomatch(int prio, event_proc *p)
805 cfg.add_nomatch(prio, p);
809 add_notify(int prio, event_proc *p)
811 cfg.add_notify(prio, p);
815 add_to_event_proc(event_proc *ep, eps *eps)
818 ep = new event_proc();
824 new_action(const char *cmd)
826 eps *e = new action(cmd);
827 free(const_cast<char *>(cmd));
832 new_match(const char *var, const char *re)
834 eps *e = new match(cfg, var, re);
835 free(const_cast<char *>(var));
836 free(const_cast<char *>(re));
841 new_media(const char *var, const char *re)
843 eps *e = new media(cfg, var, re);
844 free(const_cast<char *>(var));
845 free(const_cast<char *>(re));
850 set_pidfile(const char *name)
852 cfg.set_pidfile(name);
853 free(const_cast<char *>(name));
857 set_variable(const char *var, const char *val)
859 cfg.set_variable(var, val);
860 free(const_cast<char *>(var));
861 free(const_cast<char *>(val));
870 unlink("/var/run/devd.pid"); /* XXX */
876 fprintf(stderr, "usage: %s [-Ddn] [-f file]\n", getprogname());
887 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0)
888 errx(1, "devctl sysctl missing from kernel!");
890 warnx("Setting " SYSCTL " to 0");
892 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val));
900 main(int argc, char **argv)
904 check_devd_enabled();
905 while ((ch = getopt(argc, argv, "Ddf:n")) != -1) {
925 if (!dflag && nflag) {
927 fprintf(stderr, "Calling daemon\n");
931 signal(SIGPIPE, SIG_IGN);
932 signal(SIGHUP, gensighand);
933 signal(SIGINT, gensighand);
934 signal(SIGTERM, gensighand);