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 = '-';
82 static struct pidfh *pfh;
87 int romeo_must_die = 0;
89 static const char *configfile = CF;
91 static void event_loop(void);
92 static void usage(void);
94 template <class T> void
95 delete_and_clear(vector<T *> &v)
97 typename vector<T *>::const_iterator i;
99 for (i = v.begin(); i != v.end(); i++)
106 event_proc::event_proc() : _prio(-1)
111 event_proc::~event_proc()
113 delete_and_clear(_epsvec);
117 event_proc::add(eps *eps)
119 _epsvec.push_back(eps);
123 event_proc::matches(config &c)
125 vector<eps *>::const_iterator i;
127 for (i = _epsvec.begin(); i != _epsvec.end(); i++)
128 if (!(*i)->do_match(c))
134 event_proc::run(config &c)
136 vector<eps *>::const_iterator i;
138 for (i = _epsvec.begin(); i != _epsvec.end(); i++)
139 if (!(*i)->do_action(c))
144 action::action(const char *cmd)
156 action::do_action(config &c)
158 string s = c.expand_string(_cmd);
160 fprintf(stderr, "Executing '%s'\n", s.c_str());
165 match::match(config &c, const char *var, const char *re)
170 _re.append(c.expand_string(string(re)));
172 regcomp(&_regex, _re.c_str(), REG_EXTENDED | REG_NOSUB | REG_ICASE);
181 match::do_match(config &c)
183 string value = c.get_variable(_var);
187 fprintf(stderr, "Testing %s=%s against %s\n", _var.c_str(),
188 value.c_str(), _re.c_str());
190 retval = (regexec(&_regex, value.c_str(), 0, NULL, 0) == 0);
194 #include <sys/sockio.h>
196 #include <net/if_media.h>
198 media::media(config &, const char *var, const char *type)
199 : _var(var), _type(-1)
201 static struct ifmedia_description media_types[] = {
202 { IFM_ETHER, "Ethernet" },
203 { IFM_IEEE80211, "802.11" },
205 { IFM_CARP, "CARP" },
209 for (int i = 0; media_types[i].ifmt_string != NULL; i++)
210 if (strcasecmp(type, media_types[i].ifmt_string) == 0) {
211 _type = media_types[i].ifmt_word;
221 media::do_match(config &c)
224 struct ifmediareq ifmr;
228 // Since we can be called from both a device attach/detach
229 // context where device-name is defined and what we want,
230 // as well as from a link status context, where subsystem is
231 // the name of interest, first try device-name and fall back
232 // to subsystem if none exists.
233 value = c.get_variable("device-name");
234 if (value.length() == 0)
235 value = c.get_variable("subsystem");
237 fprintf(stderr, "Testing media type of %s against 0x%x\n",
238 value.c_str(), _type);
242 s = socket(PF_INET, SOCK_DGRAM, 0);
244 memset(&ifmr, 0, sizeof(ifmr));
245 strncpy(ifmr.ifm_name, value.c_str(), sizeof(ifmr.ifm_name));
247 if (ioctl(s, SIOCGIFMEDIA, (caddr_t)&ifmr) >= 0 &&
248 ifmr.ifm_status & IFM_AVALID) {
250 fprintf(stderr, "%s has media type 0x%x\n",
251 value.c_str(), IFM_TYPE(ifmr.ifm_active));
252 retval = (IFM_TYPE(ifmr.ifm_active) == _type);
253 } else if (_type == -1) {
255 fprintf(stderr, "%s has unknown media type\n",
265 const string var_list::bogus = "_$_$_$_$_B_O_G_U_S_$_$_$_$_";
266 const string var_list::nothing = "";
269 var_list::get_variable(const string &var) const
271 map<string, string>::const_iterator i;
274 if (i == _vars.end())
275 return (var_list::bogus);
280 var_list::is_set(const string &var) const
282 return (_vars.find(var) != _vars.end());
286 var_list::set_variable(const string &var, const string &val)
289 fprintf(stderr, "setting %s=%s\n", var.c_str(), val.c_str());
297 delete_and_clear(_var_list_table);
298 delete_and_clear(_attach_list);
299 delete_and_clear(_detach_list);
300 delete_and_clear(_nomatch_list);
301 delete_and_clear(_notify_list);
305 config::parse_one_file(const char *fn)
308 printf("Parsing %s\n", fn);
309 yyin = fopen(fn, "r");
311 err(1, "Cannot open config file %s", fn);
314 errx(1, "Cannot parse %s at line %d", fn, lineno);
319 config::parse_files_in_dir(const char *dirname)
326 printf("Parsing files in %s\n", dirname);
327 dirp = opendir(dirname);
330 readdir(dirp); /* Skip . */
331 readdir(dirp); /* Skip .. */
332 while ((dp = readdir(dirp)) != NULL) {
333 if (strcmp(dp->d_name + dp->d_namlen - 5, ".conf") == 0) {
334 snprintf(path, sizeof(path), "%s/%s",
335 dirname, dp->d_name);
336 parse_one_file(path);
343 int operator()(event_proc *const&l1, event_proc *const&l2)
345 return (l1->get_priority() > l2->get_priority());
350 config::sort_vector(vector<event_proc *> &v)
352 sort(v.begin(), v.end(), epv_greater());
358 vector<string>::const_iterator i;
360 parse_one_file(configfile);
361 for (i = _dir_list.begin(); i != _dir_list.end(); i++)
362 parse_files_in_dir((*i).c_str());
363 sort_vector(_attach_list);
364 sort_vector(_detach_list);
365 sort_vector(_nomatch_list);
366 sort_vector(_notify_list);
370 config::open_pidfile()
373 errx(1, "devd already running");
377 config::add_attach(int prio, event_proc *p)
379 p->set_priority(prio);
380 _attach_list.push_back(p);
384 config::add_detach(int prio, event_proc *p)
386 p->set_priority(prio);
387 _detach_list.push_back(p);
391 config::add_directory(const char *dir)
393 _dir_list.push_back(string(dir));
397 config::add_nomatch(int prio, event_proc *p)
399 p->set_priority(prio);
400 _nomatch_list.push_back(p);
404 config::add_notify(int prio, event_proc *p)
406 p->set_priority(prio);
407 _notify_list.push_back(p);
411 config::set_pidfile(const char *fn)
413 _pidfile = string(fn);
417 config::push_var_table()
422 _var_list_table.push_back(vl);
424 fprintf(stderr, "Pushing table\n");
428 config::pop_var_table()
430 delete _var_list_table.back();
431 _var_list_table.pop_back();
433 fprintf(stderr, "Popping table\n");
437 config::set_variable(const char *var, const char *val)
439 _var_list_table.back()->set_variable(var, val);
443 config::get_variable(const string &var)
445 vector<var_list *>::reverse_iterator i;
447 for (i = _var_list_table.rbegin(); i != _var_list_table.rend(); i++) {
448 if ((*i)->is_set(var))
449 return ((*i)->get_variable(var));
451 return (var_list::nothing);
455 config::is_id_char(char ch)
457 return (ch != '\0' && (isalpha(ch) || isdigit(ch) || ch == '_' ||
462 config::expand_one(const char *&src, string &dst)
465 string buffer, varstr;
470 dst.append(src++, 1);
475 // Not sure if I want to support this or not, so for now we just pass
480 /* If the string ends before ) is matched , return. */
481 while (count > 0 && *src) {
484 else if (*src == '(')
486 dst.append(src++, 1);
492 if (!isalpha(*src)) {
494 dst.append(src++, 1);
498 // $var -> replace with value
500 buffer.append(src++, 1);
501 } while (is_id_char(*src));
502 buffer.append("", 1);
503 varstr = get_variable(buffer.c_str());
508 config::expand_string(const string &s)
516 expand_one(src, dst);
518 dst.append(src++, 1);
526 config::chop_var(char *&buffer, char *&lhs, char *&rhs)
532 walker = lhs = buffer;
533 while (is_id_char(*walker))
538 if (*walker == '"') {
541 while (*walker && *walker != '"')
549 while (*walker && !isspace(*walker))
555 while (isspace(*walker))
563 config::set_vars(char *buffer)
569 if (!chop_var(buffer, lhs, rhs))
571 set_variable(lhs, rhs);
577 config::find_and_execute(char type)
579 vector<event_proc *> *l;
580 vector<event_proc *>::const_iterator i;
604 fprintf(stderr, "Processing %s event\n", s);
605 for (i = l->begin(); i != l->end(); i++) {
606 if ((*i)->matches(*this)) {
616 process_event(char *buffer)
623 fprintf(stderr, "Processing event '%s'\n", buffer);
625 cfg.push_var_table();
626 // No match doesn't have a device, and the format is a little
627 // different, so handle it separately.
630 sp = cfg.set_vars(sp);
633 //? at location pnp-info on bus
634 sp = strchr(sp, ' ');
636 return; /* Can't happen? */
638 if (strncmp(sp, "at ", 3) == 0)
640 sp = cfg.set_vars(sp);
641 if (strncmp(sp, "on ", 3) == 0)
642 cfg.set_variable("bus", sp + 3);
644 case attach: /*FALLTHROUGH*/
646 sp = strchr(sp, ' ');
648 return; /* Can't happen? */
650 cfg.set_variable("device-name", buffer);
651 if (strncmp(sp, "at ", 3) == 0)
653 sp = cfg.set_vars(sp);
654 if (strncmp(sp, "on ", 3) == 0)
655 cfg.set_variable("bus", sp + 3);
659 cfg.find_and_execute(type);
664 create_socket(const char *name)
667 struct sockaddr_un sun;
669 if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0)
671 bzero(&sun, sizeof(sun));
672 sun.sun_family = AF_UNIX;
673 strlcpy(sun.sun_path, name, sizeof(sun.sun_path));
674 slen = SUN_LEN(&sun);
676 if (fcntl(fd, F_SETFL, O_NONBLOCK) < 0)
678 if (bind(fd, (struct sockaddr *) & sun, slen) < 0)
681 chown(name, 0, 0); /* XXX - root.wheel */
689 notify_clients(const char *data, int len)
692 list<int>::const_iterator i;
694 for (i = clients.begin(); i != clients.end(); i++) {
695 if (write(*i, data, len) <= 0) {
701 for (i = bad.begin(); i != bad.end(); i++)
702 clients.erase(find(clients.begin(), clients.end(), *i));
710 s = accept(fd, NULL, NULL);
712 clients.push_back(s);
720 char buffer[DEVCTL_MAXBUF];
722 int server_fd, max_fd;
726 fd = open(PATH_DEVCTL, O_RDONLY);
728 err(1, "Can't open devctl device %s", PATH_DEVCTL);
729 if (fcntl(fd, F_SETFD, FD_CLOEXEC) != 0)
730 err(1, "Can't set close-on-exec flag on devctl");
731 server_fd = create_socket(PIPE);
732 max_fd = max(fd, server_fd) + 1;
736 if (!once && !dflag && !nflag) {
737 // Check to see if we have any events pending.
742 rv = select(fd + 1, &fds, &fds, &fds, &tv);
743 // No events -> we've processed all pending events
746 fprintf(stderr, "Calling daemon\n");
754 FD_SET(server_fd, &fds);
755 rv = select(max_fd, &fds, NULL, NULL, NULL);
761 if (FD_ISSET(fd, &fds)) {
762 rv = read(fd, buffer, sizeof(buffer) - 1);
764 notify_clients(buffer, rv);
766 while (buffer[--rv] == '\n')
768 process_event(buffer);
777 if (FD_ISSET(server_fd, &fds))
778 new_client(server_fd);
784 * functions that the parser uses.
787 add_attach(int prio, event_proc *p)
789 cfg.add_attach(prio, p);
793 add_detach(int prio, event_proc *p)
795 cfg.add_detach(prio, p);
799 add_directory(const char *dir)
801 cfg.add_directory(dir);
802 free(const_cast<char *>(dir));
806 add_nomatch(int prio, event_proc *p)
808 cfg.add_nomatch(prio, p);
812 add_notify(int prio, event_proc *p)
814 cfg.add_notify(prio, p);
818 add_to_event_proc(event_proc *ep, eps *eps)
821 ep = new event_proc();
827 new_action(const char *cmd)
829 eps *e = new action(cmd);
830 free(const_cast<char *>(cmd));
835 new_match(const char *var, const char *re)
837 eps *e = new match(cfg, var, re);
838 free(const_cast<char *>(var));
839 free(const_cast<char *>(re));
844 new_media(const char *var, const char *re)
846 eps *e = new media(cfg, var, re);
847 free(const_cast<char *>(var));
848 free(const_cast<char *>(re));
853 set_pidfile(const char *name)
855 cfg.set_pidfile(name);
856 free(const_cast<char *>(name));
860 set_variable(const char *var, const char *val)
862 cfg.set_variable(var, val);
863 free(const_cast<char *>(var));
864 free(const_cast<char *>(val));
873 unlink("/var/run/devd.pid"); /* XXX */
880 fprintf(stderr, "usage: %s [-Ddn] [-f file]\n", getprogname());
891 if (sysctlbyname(SYSCTL, &val, &len, NULL, 0) != 0)
892 errx(1, "devctl sysctl missing from kernel!");
894 warnx("Setting " SYSCTL " to 0");
896 sysctlbyname(SYSCTL, NULL, NULL, &val, sizeof(val));
904 main(int argc, char **argv)
908 check_devd_enabled();
909 while ((ch = getopt(argc, argv, "Ddf:n")) != -1) {
929 if (!dflag && nflag) {
931 fprintf(stderr, "Calling daemon\n");
935 signal(SIGPIPE, SIG_IGN);
936 signal(SIGHUP, gensighand);
937 signal(SIGINT, gensighand);
938 signal(SIGTERM, gensighand);