2 /* pndevmapperd exists to watch for a few interesting events and to launch scripts when they occur
3 * ie: when the lid closes, should invoke power-mode toggle sh-script
6 // woot for writing code while sick.
8 // this code begs a rewrite, but should work fine; its just arranged goofily
9 // -> I mean, why the racial divide between keys and other events
11 #include <stdio.h> /* for printf, NULL */
12 #include <stdlib.h> /* for free */
13 #include <string.h> /* for strdup */
14 #include <unistd.h> // for exit()
15 #include <sys/types.h> // for umask
16 #include <sys/stat.h> // for umask
17 #include <fcntl.h> // for open(2)
18 #include <errno.h> // for errno
19 #include <time.h> // for time(2)
20 #include <ctype.h> // for isdigit
21 #include <signal.h> // for sigaction
22 #include <sys/wait.h> // for wait
23 #include <sys/time.h> // setitimer
25 #include <linux/input.h> // for keys
26 //#include "../../kernel-rip/input.h" // for keys
29 #include "pnd_container.h"
31 #include "pnd_discovery.h"
32 #include "pnd_locate.h"
33 #include "pnd_pndfiles.h"
35 #include "pnd_logger.h"
36 #include "pnd_utility.h"
37 #include "pnd_notify.h"
38 #include "pnd_device.h"
42 unsigned char g_daemon_mode = 0;
43 unsigned int g_minimum_separation = 1;
47 pndn_rem, // will set default log level to here, so 'debug' is omitted
51 } pndnotify_loglevels_e;
53 // key/event definition
60 keycode_t keycodes[] = {
62 { KEY_MENU, "pandora" },
63 { KEY_POWER, "power" },
64 { KEY_DELETE, "del" },
65 { KEY_COMMA, "comma" },
76 { KEY_BRIGHTNESSDOWN, "lcdbrightdown" },
77 { KEY_BRIGHTNESSUP, "lcdbrightup" },
87 generic_event_t generics[] = {
88 { EV_SW, 0, "lid-toggle" }, // expecting value 1 (lid close) or 0 (lid open)
92 // event-to-sh mapping
96 unsigned char key_p; // 1 if its a key, otherwise an event
98 /* template information
100 void *reqs; // scancode/etc for the event in question
102 char *script; // script to invoke
103 //unsigned int hold_min; // minimum hold-time to trigger
107 time_t last_trigger_time;
112 #define MAXEVENTS 255
113 evmap_t g_evmap [ MAXEVENTS ];
114 unsigned int g_evmap_max = 0;
117 unsigned char b_threshold = 5; // %battery
118 unsigned int b_frequency = 300; // frequency to check
119 unsigned int b_blinkfreq = 2; // blink every 2sec
120 unsigned int b_blinkdur = 1000; // blink duration (uSec), 0sec + uSec is assumed
121 unsigned char b_active = 0; // 0=inactive, 1=active and waiting to blink, 2=blink is on, waiting to turn off
122 unsigned char b_shutdown = 1; // %age battery to force a shutdown!
123 char *b_shutdown_script = NULL;
127 void dispatch_key ( int keycode, int val );
128 void dispatch_event ( int code, int val );
129 void sigchld_handler ( int n );
130 unsigned char set_next_alarm ( unsigned int secs, unsigned int usecs );
131 void sigalrm_handler ( int n );
133 static void usage ( char *argv[] ) {
134 printf ( "%s [-d]\n", argv [ 0 ] );
135 printf ( "-d\tDaemon mode; detach from terminal, chdir to /tmp, suppress output. Optional.\n" );
136 printf ( "-l#\tLog-it; -l is 0-and-up (or all), and -l2 means 2-and-up (not all); l[0-3] for now. Log goes to /tmp/pndevmapperd.log\n" );
140 int main ( int argc, char *argv[] ) {
142 int logall = -1; // -1 means normal logging rules; >=0 means log all!
144 for ( i = 1; i < argc; i++ ) {
146 if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'd' ) {
147 //printf ( "Going daemon mode. Silent running.\n" );
149 } else if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'l' ) {
151 if ( isdigit ( argv [ i ][ 2 ] ) ) {
152 unsigned char x = atoi ( argv [ i ] + 2 );
170 pnd_log_set_pretext ( "pndevmapperd" );
171 pnd_log_set_flush ( 1 );
173 if ( logall == -1 ) {
174 // standard logging; non-daemon versus daemon
176 if ( g_daemon_mode ) {
179 pnd_log_set_filter ( pndn_rem );
186 f = fopen ( "/tmp/pndevmapperd.log", "w" );
189 pnd_log_set_filter ( logall );
190 pnd_log_to_stream ( f );
191 pnd_log ( pndn_rem, "logall mode - logging to /tmp/pndevmapperd.log\n" );
194 if ( logall == pndn_debug ) {
195 pnd_log_set_buried_logging ( 1 ); // log the shit out of it
196 pnd_log ( pndn_rem, "logall mode 0 - turned on buried logging\n" );
201 pnd_log ( pndn_rem, "%s built %s %s", argv [ 0 ], __DATE__, __TIME__ );
203 pnd_log ( pndn_rem, "log level starting as %u", pnd_log_get_filter() );
205 // basic daemon set up
206 if ( g_daemon_mode ) {
208 // set a CWD somewhere else
211 // detach from terminal
212 if ( ( i = fork() ) < 0 ) {
213 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
217 exit ( 0 ); // exit parent
222 umask ( 022 ); // emitted files can be rwxr-xr-x
226 /* hmm, seems to not like working right after boot.. do we depend on another daemon or
227 * on giving kernel time to init something, or ... wtf?
228 * -- lets give the system some time to wake up
232 // this one works for pndnotifyd, which actually needs INOTIFYH..
235 // check if inotify is awake yet; if not, try waiting for awhile to see if it does
236 pnd_log ( pndn_rem, "Starting INOTIFY test; should be instant, but may take awhile...\n" );
238 if ( ! pnd_notify_wait_until_ready ( 120 /* seconds */ ) ) {
239 pnd_log ( pndn_error, "ERROR: INOTIFY refuses to be useful and quite awhile has passed. Bailing out.\n" );
243 pnd_log ( pndn_rem, "INOTIFY seems to be useful, whew.\n" );
245 // pndnotifyd also waits for user to log in .. pretty excessive, especially since
246 // what if user wants to close the lid while at the log in screen? for now play the
247 // odds as thats pretty unliekly usage scenariom but is clearly not acceptible :/
250 // wait for a user to be logged in - we should probably get hupped when a user logs in, so we can handle
251 // log-out and back in again, with SDs popping in and out between..
252 pnd_log ( pndn_rem, "Checking to see if a user is logged in\n" );
253 char tmp_username [ 128 ];
255 if ( pnd_check_login ( tmp_username, 127 ) ) {
258 pnd_log ( pndn_debug, " No one logged in yet .. spinning.\n" );
261 pnd_log ( pndn_rem, "Looks like user '%s' is in, continue.\n", tmp_username );
265 /* inhale config or die trying
269 // attempt to fetch a sensible default searchpath for configs
270 configpath = pnd_conf_query_searchpath();
272 // attempt to fetch the apps config. since it finds us the runscript
273 pnd_conf_handle evmaph;
275 evmaph = pnd_conf_fetch_by_id ( pnd_conf_evmap, configpath );
278 // couldn't locate conf, just bail
279 pnd_log ( pndn_error, "ERROR: Couldn't locate conf file\n" );
283 /* iterate across conf, stocking the event map
285 void *n = pnd_box_get_head ( evmaph );
288 char *k = pnd_box_get_key ( n );
289 //printf ( "key %s\n", k );
291 if ( strncmp ( k, "keys.", 5 ) == 0 ) {
294 // keys should really push push generic-events onto the table, since they;'re just a special case of them
295 // to make things easier to read
297 // figure out which keycode we're talking about
298 keycode_t *p = keycodes;
299 while ( p -> keycode != -1 ) {
300 if ( strcasecmp ( p -> keyname, k ) == 0 ) {
306 if ( p -> keycode != -1 ) {
307 g_evmap [ g_evmap_max ].key_p = 1; // its a key, not an event
308 g_evmap [ g_evmap_max ].reqs = p; // note the keycode
309 g_evmap [ g_evmap_max ].script = n; // note the script to activate in response
310 pnd_log ( pndn_rem, "Registered key %s [%d] to script %s\n", p -> keyname, p -> keycode, (char*) n );
313 pnd_log ( pndn_warning, "WARNING! Key '%s' is not handled by pndevmapperd yet! Skipping.", k );
316 } else if ( strncmp ( k, "events.", 7 ) == 0 ) {
319 // yes, key events could really be defined in this generic sense, and really we could just let people
320 // put the code and so on right in the conf, but trying to keep it easy on people; maybe should
321 // add a 'generic' section to conf file and just let folks redefine random events that way
322 // Really, it'd be nice if the /dev/input/events could spit out useful text, and just use scripts
323 // to respond without a daemon per se; for that matter, pnd-ls and pnd-map pnd-dotdesktopemitter
324 // should just exist as scripts rather than daemons, but whose counting?
326 // figure out which keycode we're talking about
327 generic_event_t *p = generics;
328 while ( p -> code != -1 ) {
329 if ( strcasecmp ( p -> name, k ) == 0 ) {
335 if ( p -> code != -1 ) {
336 g_evmap [ g_evmap_max ].key_p = 0; // its an event, not a key
337 g_evmap [ g_evmap_max ].reqs = p; // note the keycode
338 g_evmap [ g_evmap_max ].script = n; // note the script to activate in response
339 pnd_log ( pndn_rem, "Registered generic event %s [%d] to script %s\n", p -> name, p -> code, (char*) n );
342 pnd_log ( pndn_warning, "WARNING! Generic event '%s' is not handled by pndevmapperd yet! Skipping.", k );
345 } else if ( strncmp ( k, "pndevmapperd.", 7 ) == 0 ) {
346 // not consumed here, skip silently
348 } else if ( strncmp ( k, "battery.", 8 ) == 0 ) {
349 // not consumed here, skip silently
353 pnd_log ( pndn_warning, "Unknown config key '%s'; skipping.\n", k );
356 n = pnd_box_get_next ( n );
359 if ( pnd_conf_get_as_int ( evmaph, "pndevmapperd.loglevel" ) != PND_CONF_BADNUM ) {
360 pnd_log_set_filter ( pnd_conf_get_as_int ( evmaph, "pndevmapperd.loglevel" ) );
361 pnd_log ( pndn_rem, "config file causes loglevel to change to %u", pnd_log_get_filter() );
364 if ( pnd_conf_get_as_int ( evmaph, "pndevmapperd.minimum_separation" ) != PND_CONF_BADNUM ) {
365 g_minimum_separation = pnd_conf_get_as_int ( evmaph, "pndevmapperd.minimum_separation" );
366 pnd_log ( pndn_rem, "config file causes minimum_separation to change to %u", g_minimum_separation );
370 if ( pnd_conf_get_as_int ( evmaph, "battery.threshold" ) != PND_CONF_BADNUM ) {
371 b_threshold = pnd_conf_get_as_int ( evmaph, "battery.threshold" );
372 pnd_log ( pndn_rem, "Battery threshold set to %u", b_threshold );
374 if ( pnd_conf_get_as_int ( evmaph, "battery.check_interval" ) != PND_CONF_BADNUM ) {
375 b_frequency = pnd_conf_get_as_int ( evmaph, "battery.check_interval" );
376 pnd_log ( pndn_rem, "Battery check interval set to %u", b_frequency );
378 if ( pnd_conf_get_as_int ( evmaph, "battery.blink_interval" ) != PND_CONF_BADNUM ) {
379 b_blinkfreq = pnd_conf_get_as_int ( evmaph, "battery.blink_interval" );
380 pnd_log ( pndn_rem, "Battery blink interval set to %u", b_blinkfreq );
382 if ( pnd_conf_get_as_int ( evmaph, "battery.blink_duration" ) != PND_CONF_BADNUM ) {
383 b_blinkdur = pnd_conf_get_as_int ( evmaph, "battery.blink_duration" );
384 pnd_log ( pndn_rem, "Battery blink duration set to %u", b_blinkdur );
387 if ( pnd_conf_get_as_int ( evmaph, "battery.shutdown_threshold" ) != PND_CONF_BADNUM ) {
388 b_shutdown = pnd_conf_get_as_int ( evmaph, "battery.shutdown_threshold" );
389 pnd_log ( pndn_rem, "Battery shutdown threshold set to %u", b_shutdown );
391 if ( pnd_conf_get_as_char ( evmaph, "battery.shutdown_script" ) != NULL ) {
392 b_shutdown_script = strdup ( pnd_conf_get_as_char ( evmaph, "battery.shutdown_script" ) );
393 pnd_log ( pndn_rem, "Battery shutdown script set to %s", b_shutdown_script );
396 /* do we have anything to do?
398 if ( ! g_evmap_max ) {
399 // uuuh, nothing to do?
400 pnd_log ( pndn_warning, "WARNING! No events configured to watch, so just spinning wheels...\n" );
404 /* set up sigchld -- don't want zombies all over; well, we do, but not process zombies
409 struct sigaction siggy;
410 siggy.sa_handler = sigchld_handler;
411 siggy.sa_mask = ss; /* implicitly blocks the origin signal */
412 siggy.sa_flags = SA_RESTART; /* don't need anything */
413 sigaction ( SIGCHLD, &siggy, NULL );
415 /* set up the battery level warning timers
417 siggy.sa_handler = sigalrm_handler;
418 siggy.sa_mask = ss; /* implicitly blocks the origin signal */
419 siggy.sa_flags = SA_RESTART; /* don't need anything */
420 sigaction ( SIGALRM, &siggy, NULL );
422 if ( set_next_alarm ( b_frequency, 0 ) ) { // check every 'frequency' seconds
423 pnd_log ( pndn_rem, "Checking for low battery every %u seconds\n", b_frequency );
425 pnd_log ( pndn_error, "ERROR: Couldn't set up timer for every %u seconds\n", b_frequency );
428 /* actually try to do something useful
431 // stolen in part from notaz :)
433 // try to locate the appropriate devices
435 int fds [ 8 ] = { -1, -1, -1, -1, -1, -1, -1, -1 }; // 0 = keypad, 1 = gpio keys
438 for ( id = 0; ; id++ ) {
440 char name[256] = { 0, };
443 snprintf ( fname, sizeof ( fname ), "/dev/input/event%i", id );
444 fd = open ( fname, O_RDONLY );
450 if ( ioctl (fd, EVIOCGNAME(sizeof(name)), name ) < 0 ) {
454 pnd_log ( pndn_rem, "%s maps to %s\n", fname, name );
456 if ( strcmp ( name, "omap_twl4030keypad" ) == 0 ) {
458 } else if ( strcmp ( name, "gpio-keys" ) == 0) {
460 } else if ( strcmp ( name, "AT Translated Set 2 keyboard" ) == 0) { // for vmware, my dev environment
462 } else if ( strcmp ( name, "triton2-pwrbutton" ) == 0) {
464 } else if ( strcmp ( name, "ADS784x Touchscreen" ) == 0) {
466 } else if ( strcmp ( name, "vsense66" ) == 0) {
468 } else if ( strcmp ( name, "vsense67" ) == 0) {
471 pnd_log ( pndn_rem, "Ignoring unknown device '%s'\n", name );
478 if (imaxfd < fd) imaxfd = fd;
482 if ( fds [ 0 ] == -1 ) {
483 pnd_log ( pndn_warning, "WARNING! Couldn't find keypad device\n" );
486 if ( fds [ 1 ] == -1 ) {
487 pnd_log ( pndn_warning, "WARNING! couldn't find button device\n" );
490 if ( fds [ 0 ] == -1 && fds [ 1 ] == -1 ) {
491 pnd_log ( pndn_error, "ERROR! Couldn't find either device!\n" );
495 /* loop forever, watching for events
499 struct input_event ev[64];
501 unsigned int max_fd = 3; /* imaxfd */
502 int fd = -1, rd, ret;
508 for (i = 0; i < max_fd /*imaxfd*/; i++) {
509 if ( fds [ i ] != -1 ) {
510 FD_SET( fds [ i ], &fdset );
512 if ( fds [ i ] > imaxfd ) {
519 ret = select ( imaxfd + 1, &fdset, NULL, NULL, NULL );
522 pnd_log ( pndn_error, "ERROR! select(2) failed with: %s\n", strerror ( errno ) );
526 for ( i = 0; i < max_fd; i++ ) {
527 if ( fds [ i ] != -1 && FD_ISSET ( fds [ i ], &fdset ) ) {
532 /* buttons or keypad */
533 rd = read ( fd, ev, sizeof(struct input_event) * 64 );
534 if ( rd < (int) sizeof(struct input_event) ) {
535 pnd_log ( pndn_error, "ERROR! read(2) input_event failed with: %s\n", strerror ( errno ) );
539 for (i = 0; i < rd / sizeof(struct input_event); i++ ) {
541 if ( ev[i].type == EV_SYN ) {
543 } else if ( ev[i].type == EV_KEY ) {
545 // do we even know about this key at all?
546 keycode_t *p = keycodes;
547 while ( p -> keycode != -1 ) {
548 if ( p -> keycode == ev [ i ].code ) {
554 // if we do, hand it off to dispatcher to look up if we actually do something with it
555 if ( p -> keycode != -1 ) {
557 pnd_log ( pndn_debug, "Key Event: key %s [%d] value %d\n", p -> keyname, p -> keycode, ev [ i ].value );
559 dispatch_key ( p -> keycode, ev [ i ].value );
562 pnd_log ( pndn_warning, "Unknown Key Event: keycode %d value %d\n", ev [ i ].code, ev [ i ].value );
566 } else if ( ev[i].type == EV_SW ) {
568 // do we even know about this event at all?
569 generic_event_t *p = generics;
570 while ( p -> code != -1 ) {
571 if ( p -> code == ev [ i ].code ) {
577 // if we do, hand it off to dispatcher to look up if we actually do something with it
578 if ( p -> code != -1 ) {
580 pnd_log ( pndn_debug, "Generic Event: event %s [%d] value %d\n", p -> name, p -> code, ev [ i ].value );
582 dispatch_event ( p -> code, ev [ i ].value );
585 pnd_log ( pndn_warning, "Unknown Generic Event: code %d value %d\n", ev [ i ].code, ev [ i ].value );
590 pnd_log ( pndn_debug, "DEBUG: Unexpected event type %i received\n", ev[i].type );
598 for (i = 0; i < 2; i++) {
599 if ( i != 2 && fds [ i ] != -1 ) {
607 // this should really register the keystate and time, and then another func to monitor
608 // time-passage and check the registered list and act on the event..
609 void dispatch_key ( int keycode, int val ) {
613 // 1 - down (pressed)
614 // 2 - down again (hold)
617 pnd_log ( pndn_rem, "Dispatching Key..\n" );
619 for ( i = 0; i < g_evmap_max; i++ ) {
621 if ( ( g_evmap [ i ].key_p ) &&
622 ( ((keycode_t*) (g_evmap [ i ].reqs)) -> keycode == keycode ) &&
623 ( g_evmap [ i ].script ) )
626 // is this a keydown or a keyup?
629 g_evmap [ i ].keydown_time = time ( NULL );
631 } else if ( val == 0 ) {
634 char holdtime [ 128 ];
635 sprintf ( holdtime, "%d", (int)( time(NULL) - g_evmap [ i ].keydown_time ) );
637 if ( time ( NULL ) - g_evmap [ i ].last_trigger_time >= g_minimum_separation ) {
640 g_evmap [ i ].last_trigger_time = time ( NULL );
642 pnd_log ( pndn_rem, "Will attempt to invoke: %s %s\n", g_evmap [ i ].script, holdtime );
644 if ( ( x = fork() ) < 0 ) {
645 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
650 execl ( g_evmap [ i ].script, g_evmap [ i ].script, holdtime, (char*)NULL );
651 pnd_log ( pndn_error, "ERROR: Couldn't exec(%s)\n", g_evmap [ i ].script );
656 pnd_log ( pndn_rem, "Skipping invokation.. falls within minimum_separation threshold\n" );
662 } // found matching event for keycode
669 void dispatch_event ( int code, int val ) {
672 // LID val decodes as:
676 pnd_log ( pndn_rem, "Dispatching Event..\n" );
678 for ( i = 0; i < g_evmap_max; i++ ) {
680 if ( ( g_evmap [ i ].key_p == 0 ) &&
681 ( ((generic_event_t*) (g_evmap [ i ].reqs)) -> code == code ) &&
682 ( g_evmap [ i ].script ) )
685 // just hand the code to the script (ie: 0 or 1 to script)
686 if ( time ( NULL ) - g_evmap [ i ].last_trigger_time >= g_minimum_separation ) {
690 sprintf ( value, "%d", val );
692 g_evmap [ i ].last_trigger_time = time ( NULL );
694 pnd_log ( pndn_rem, "Will attempt to invoke: %s %s\n", g_evmap [ i ].script, value );
696 if ( ( x = fork() ) < 0 ) {
697 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
702 execl ( g_evmap [ i ].script, g_evmap [ i ].script, value, (char*)NULL );
703 pnd_log ( pndn_error, "ERROR: Couldn't exec(%s)\n", g_evmap [ i ].script );
708 pnd_log ( pndn_rem, "Skipping invokation.. falls within minimum_separation threshold\n" );
712 } // found matching event for keycode
719 void sigchld_handler ( int n ) {
721 pnd_log ( pndn_rem, "---[ SIGCHLD received ]---\n" );
726 pnd_log ( pndn_rem, " SIGCHLD done ]---\n" );
731 unsigned char set_next_alarm ( unsigned int secs, unsigned int usecs ) {
733 // assume that SIGALRM is already being caught, we just set the itimer here
735 struct itimerval itv;
737 // if no timer at all, set the 'current' one so it does something; otherwise
739 getitimer ( ITIMER_REAL, &itv );
741 if ( itv.it_value.tv_sec == 0 && itv.it_value.tv_sec == 0 ) {
742 itv.it_value.tv_sec = secs;
743 itv.it_value.tv_usec = usecs;
746 // set the next timer
747 //bzero ( &itv, sizeof(struct itimerval) );
749 itv.it_interval.tv_sec = secs;
750 itv.it_interval.tv_usec = usecs;
752 // if next-timer is less than current, set current too
753 if ( itv.it_value.tv_sec > itv.it_interval.tv_sec ) {
754 itv.it_value.tv_sec = secs;
755 itv.it_value.tv_usec = usecs;
758 if ( setitimer ( ITIMER_REAL, &itv, NULL /* old value returned here */ ) < 0 ) {
766 void sigalrm_handler ( int n ) {
768 pnd_log ( pndn_debug, "---[ SIGALRM ]---\n" );
770 int batlevel = pnd_device_get_battery_gauge_perc();
772 if ( batlevel < 0 ) {
773 // couldn't read the battery level, so just assume low and make blinks?
774 batlevel = 4; // low, but not cause a shutdown
777 // first -- are we critical yet? if so, shut down!
778 if ( batlevel <= b_shutdown && b_shutdown_script ) {
781 pnd_log ( pndn_error, "CRITICAL BATTERY LEVEL -- shutdown the system down! Invoke: %s\n", b_shutdown_script );
783 if ( ( x = fork() ) < 0 ) {
784 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
789 execl ( b_shutdown_script, b_shutdown_script, (char*)NULL );
790 pnd_log ( pndn_error, "ERROR: Couldn't exec(%s)\n", b_shutdown_script );
796 // is battery warning already active?
800 // is user charging up? if so, stop blinking.
801 // perhaps we shoudl check if charger is connected, and not blink at all in that case..
802 if ( batlevel > b_threshold + 1 /* allow for error in read */ ) {
803 pnd_log ( pndn_debug, "Battery is high again, flipping to non-blinker mode\n" );
805 set_next_alarm ( b_frequency, 0 );
806 pnd_device_set_led_charger_brightness ( 250 );
810 if ( b_active == 1 ) {
812 pnd_log ( pndn_debug, "Blink on\n" );
813 pnd_device_set_led_charger_brightness ( 200 );
814 // set timer to short duration
816 set_next_alarm ( 0, b_blinkdur );
817 } else if ( b_active == 2 ) {
819 pnd_log ( pndn_debug, "Blink off\n" );
820 pnd_device_set_led_charger_brightness ( 10 );
821 // back to longer duration
823 set_next_alarm ( b_blinkfreq, 0 );
830 if ( batlevel <= b_threshold ) {
831 // battery seems low, go to active mode
832 pnd_log ( pndn_debug, "Battery is low, flipping to blinker mode\n" );
834 set_next_alarm ( b_blinkfreq, 0 );