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
);