2 /* pndnotifyd - a daemon whose job is to monitor searchpaths for app changes (appearing, disappearing, changing).
3 * If a change is found, the discovery code is invoked and apps registered for the launchers to see
7 #include <stdio.h> // for stdio
8 #include <unistd.h> // for exit()
9 #include <stdlib.h> // for exit()
10 #define __USE_GNU /* for strcasestr */
12 #include <time.h> // for time()
13 #include <ctype.h> // for isdigit()
14 #include <sys/types.h> // for umask
15 #include <sys/stat.h> // for umask
16 #include <dirent.h> // for opendir()
17 #include <signal.h> // for sigaction
20 #include "pnd_container.h"
22 #include "pnd_notify.h"
23 #include "../lib/pnd_pathiter.h"
24 #include "pnd_discovery.h"
25 #include "pnd_locate.h"
27 #include "pnd_utility.h"
28 #include "pnd_desktop.h"
29 #include "pnd_logger.h"
31 // this piece of code was simpler once; but need to grow it a bit and in a rush
32 // moving all these to globals rather than refactor the code a bit; tsk tsk..
34 // op mode; emitting stdout or no?
35 static unsigned char g_daemon_mode = 0;
39 pndn_rem, // will set default log level to here, so 'debug' is omitted
43 } pndnotify_loglevels_e;
49 char *searchpath = NULL;
50 char *notifypath = NULL;
51 time_t createtime = 0; // all 'new' .destops are created at or after this time; prev are old.
52 // dotfiles; this used to be a single pai .. now two pairs, a little unwieldy; pnd_box it up?
53 char *desktop_dotdesktoppath = NULL;
54 char *desktop_iconpath = NULL;
55 char *desktop_appspath = NULL;
56 char *menu_dotdesktoppath = NULL;
57 char *menu_iconpath = NULL;
58 char *menu_appspath = NULL;
60 char *run_searchpath; // searchpath to find pnd_run.sh
61 char *run_script; // name of pnd_run.sh script from config
62 char *pndrun; // full path to located pnd_run.sh
63 char *pndhup = NULL; // full path to located pnd_hup.sh
65 pnd_notify_handle nh = 0;
68 #define PNDNOTIFYD_LOGLEVEL "pndnotifyd.loglevel"
71 void consume_configuration ( void );
72 void setup_notifications ( void );
73 void sighup_handler ( int n );
74 void process_discoveries ( pnd_box_handle applist, char *emitdesktoppath, char *emiticonpath );
75 unsigned char perform_discoveries ( char *appspath, char *overridespath,
76 char *emitdesktoppath, char *emiticonpath );
78 int main ( int argc, char *argv[] ) {
80 unsigned char scanonlaunch = 1;
81 unsigned int interval_secs = 5;
82 int logall = -1; // -1 means normal logging rules; >=0 means log all!
86 /* iterate across args
88 for ( i = 1; i < argc; i++ ) {
90 if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'd' ) {
91 //printf ( "Going daemon mode. Silent running.\n" );
93 } else if ( isdigit ( argv [ i ][ 0 ] ) ) {
94 interval_secs = atoi ( argv [ i ] );
95 } else if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'n' ) {
97 } else if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'l' ) {
99 if ( isdigit ( argv [ i ][ 2 ] ) ) {
100 unsigned char x = atoi ( argv [ i ] + 2 );
111 printf ( "%s [-d] [##]\n", argv [ 0 ] );
112 printf ( "-d\tDaemon mode; detach from terminal, chdir to /tmp, suppress output. Optional.\n" );
113 printf ( "-n\tDo not scan on launch; default is to run a scan for apps when %s is invoked.\n", argv [ 0 ] );
114 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/pndnotifyd.log\n" );
115 printf ( "##\tA numeric value is interpreted as number of seconds between checking for filesystem changes. Default %u.\n",
117 printf ( "Signal: HUP the process to force reload of configuration and reset the notifier watch paths\n" );
125 pnd_log_set_pretext ( "pndnotifyd" );
126 pnd_log_set_flush ( 1 );
128 if ( logall == -1 ) {
129 // standard logging; non-daemon versus daemon
131 if ( g_daemon_mode ) {
134 pnd_log_set_filter ( pndn_rem );
141 f = fopen ( "/tmp/pndnotifyd.log", "w" );
144 pnd_log_set_filter ( logall );
145 pnd_log_to_stream ( f );
146 pnd_log ( pndn_rem, "logall mode - logging to /tmp/pndnotifyd.log\n" );
149 if ( logall == pndn_debug ) {
150 pnd_log_set_buried_logging ( 1 ); // log the shit out of it
151 pnd_log ( pndn_rem, "logall mode 0 - turned on buried logging\n" );
156 pnd_log ( pndn_rem, "log level starting as %u", pnd_log_get_filter() );
158 pnd_log ( pndn_rem, "Interval between checks is %u seconds\n", interval_secs );
160 // check if inotify is awake yet; if not, try waiting for awhile to see if it does
161 pnd_log ( pndn_rem, "Starting INOTIFY test; should be instant, but may take awhile...\n" );
163 if ( ! pnd_notify_wait_until_ready ( 120 /* seconds */ ) ) {
164 pnd_log ( pndn_error, "ERROR: INOTIFY refuses to be useful and quite awhile has passed. Bailing out.\n" );
168 pnd_log ( pndn_rem, "INOTIFY seems to be useful, whew.\n" );
170 // basic daemon set up
171 if ( g_daemon_mode ) {
173 // set a CWD somewhere else
178 // detach from terminal
179 if ( ( i = fork() ) < 0 ) {
180 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
184 exit ( 0 ); // exit parent
189 umask ( 022 ); // emitted files can be rwxr-xr-x
193 // wait for a user to be logged in - we should probably get hupped when a user logs in, so we can handle
194 // log-out and back in again, with SDs popping in and out between..
195 pnd_log ( pndn_rem, "Checking to see if a user is logged in\n" );
196 char tmp_username [ 128 ];
198 if ( pnd_check_login ( tmp_username, 127 ) ) {
201 pnd_log ( pndn_debug, " No one logged in yet .. spinning.\n" );
204 pnd_log ( pndn_rem, "Looks like user '%s' is in, continue.\n", tmp_username );
209 consume_configuration();
214 pnd_log ( pndn_rem, "PXML overrides searchpath is '%s'\n", overridespath );
215 pnd_log ( pndn_rem, "Notify searchpath is '%s'\n", notifypath );
217 pnd_log ( pndn_rem, "Desktop apps ---------------------------------\n" );
218 pnd_log ( pndn_rem, "Apps searchpath is '%s'\n", desktop_appspath );
219 pnd_log ( pndn_rem, ".desktop files emit to '%s'\n", desktop_dotdesktoppath );
220 pnd_log ( pndn_rem, ".desktop icon files emit to '%s'\n", desktop_iconpath );
222 pnd_log ( pndn_rem, "Menu apps ---------------------------------\n" );
223 pnd_log ( pndn_rem, "Apps searchpath is '%s'\n", menu_appspath );
224 pnd_log ( pndn_rem, ".desktop files emit to '%s'\n", menu_dotdesktoppath );
225 pnd_log ( pndn_rem, ".desktop icon files emit to '%s'\n", menu_iconpath );
227 /* set up signal handler
232 struct sigaction siggy;
233 siggy.sa_handler = sighup_handler;
234 siggy.sa_mask = ss; /* implicitly blocks the origin signal */
235 siggy.sa_flags = 0; /* don't need anything */
237 sigaction ( SIGHUP, &siggy, NULL );
242 // if we're gong to scan on launch, it'll set things right up and then set up notifications.
243 // if no scan on launch, we need to set the notif's up now.
244 //if ( ! scanonlaunch ) {
245 setup_notifications();
252 // need to rediscover?
254 pnd_notify_rediscover_p ( nh ) )
256 createtime = time ( NULL ); // all 'new' .destops are created at or after this time; prev are old.
258 // if this was a forced scan, lets not do that next iteration
259 if ( scanonlaunch ) {
263 // by this point, the watched directories have notified us that something of relevent
264 // has occurred; we should be clever, but we're not, so just re-brute force the
265 // discovery and spit out .desktop files..
266 pnd_log ( pndn_rem, "------------------------------------------------------\n" );
267 pnd_log ( pndn_rem, "Changes within watched paths .. performing re-discover!\n" );
272 pnd_log ( pndn_rem, "Scanning desktop paths----------------------------\n" );
273 if ( ! perform_discoveries ( desktop_appspath, overridespath, desktop_dotdesktoppath, desktop_iconpath ) ) {
274 pnd_log ( pndn_rem, "No applications found in desktop search path\n" );
277 if ( menu_appspath && menu_dotdesktoppath && menu_iconpath ) {
278 pnd_log ( pndn_rem, "Scanning menu paths----------------------------\n" );
279 if ( ! perform_discoveries ( menu_appspath, overridespath, menu_dotdesktoppath, menu_iconpath ) ) {
280 pnd_log ( pndn_rem, "No applications found in menu search path\n" );
284 // if we've got a hup script located, lets invoke it
286 pnd_log ( pndn_rem, "Invoking hup script '%s'.\n", pndhup );
287 pnd_exec_no_wait_1 ( pndhup, NULL );
290 // since its entirely likely new directories have been found (ie: SD with a directory structure was inserted)
291 // we should re-apply watches to catch all these new directories; ie: user might use on-device browser to
292 // drop in new applications, or use the shell to juggle them around, or any number of activities.
293 //setup_notifications();
295 } // need to rediscover?
297 // lets not eat up all the CPU
298 // should use an alarm or select() or something -- I mean really, why aren't I putting interval_secs into
299 // the select() call above in pnd_notify_whatsitcalled()? -- but lets not break this right before release shall we
300 // NOTE: Oh right, I remember now -- inotify will spam when a card is inserted, and it will not be instantaneoous..
301 // the events will dribble in over a second. So this sleep is a lame trick that generally works. I really should
302 // do select(), and then when it returns just spin for a couple seconds slurping up events until no more and a thresh-hold
303 // time is hit, but this will do for now. I suck.
304 sleep ( interval_secs );
310 pnd_notify_shutdown ( nh );
315 void consume_configuration ( void ) {
317 // attempt to fetch a sensible default searchpath for configs
318 configpath = pnd_conf_query_searchpath();
320 // attempt to fetch the apps config to pick up a searchpath
321 pnd_conf_handle apph;
323 apph = pnd_conf_fetch_by_id ( pnd_conf_apps, configpath );
327 overridespath = pnd_conf_get_as_char ( apph, PND_PXML_OVERRIDE_KEY );
329 if ( ! overridespath ) {
330 overridespath = PND_PXML_OVERRIDE_SEARCHPATH;
333 notifypath = pnd_conf_get_as_char ( apph, PND_APPS_NOTIFY_KEY );
335 if ( ! notifypath ) {
336 notifypath = PND_APPS_NOTIFYPATH;
340 // couldn't find a useful app search path so use the default
341 overridespath = PND_PXML_OVERRIDE_SEARCHPATH;
342 notifypath = PND_APPS_NOTIFYPATH;
345 // attempt to figure out where to drop dotfiles .. now that we're going
346 // multi-target we see the limit of my rudimentary conf-file parser; should
347 // just parse to an array of targets, rather that hardcoding two, but
348 // on the other hand, don't likely see the need for more than two? (famous
350 pnd_conf_handle desktoph;
352 desktoph = pnd_conf_fetch_by_id ( pnd_conf_desktop, configpath );
354 // for 'desktop' main applications
356 desktop_dotdesktoppath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_DOTDESKTOP_PATH_KEY );
357 desktop_iconpath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_ICONS_PATH_KEY );
358 desktop_appspath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_SEARCH_KEY );
361 if ( ! desktop_dotdesktoppath ) {
362 desktop_dotdesktoppath = PND_DESKTOP_DOTDESKTOP_PATH_DEFAULT;
365 if ( ! desktop_iconpath ) {
366 desktop_iconpath = PND_DESKTOP_ICONS_PATH_DEFAULT;
369 if ( ! desktop_appspath ) {
370 desktop_appspath = PND_DESKTOP_SEARCH_PATH_DEFAULT;
373 // for 'menu' applications
375 menu_dotdesktoppath = pnd_conf_get_as_char ( desktoph, PND_MENU_DOTDESKTOP_PATH_KEY );
376 menu_iconpath = pnd_conf_get_as_char ( desktoph, PND_MENU_ICONS_PATH_KEY );
377 menu_appspath = pnd_conf_get_as_char ( desktoph, PND_MENU_SEARCH_KEY );
380 /* try to locate a runscript and optional hupscript
384 run_searchpath = pnd_conf_get_as_char ( apph, PND_PNDRUN_SEARCHPATH_KEY );
385 run_script = pnd_conf_get_as_char ( apph, PND_PNDRUN_KEY );
388 if ( ! run_searchpath ) {
389 run_searchpath = PND_APPS_SEARCHPATH;
390 run_script = PND_PNDRUN_FILENAME;
393 if ( pnd_conf_get_as_int ( apph, PNDNOTIFYD_LOGLEVEL ) != PND_CONF_BADNUM ) {
394 if ( pnd_log_do_buried_logging() == 0 ) {
395 pnd_log_set_filter ( pnd_conf_get_as_int ( apph, PNDNOTIFYD_LOGLEVEL ) );
396 pnd_log ( pndn_rem, "config file causes loglevel to change to %u", pnd_log_get_filter() );
398 pnd_log ( pndn_rem, "-l command line suppresses log level change in config file\n" );
403 run_searchpath = NULL;
405 pndrun = PND_PNDRUN_DEFAULT;
409 pndrun = pnd_locate_filename ( run_searchpath, run_script );
412 pndrun = strdup ( pndrun ); // so we don't just use the built in buffer; next locate will overwrite it
414 pndrun = PND_PNDRUN_DEFAULT;
419 if ( desktoph && run_searchpath ) {
422 if ( ( t = pnd_conf_get_as_char ( desktoph, PND_PNDHUP_KEY ) ) ) {
423 pndhup = pnd_locate_filename ( run_searchpath, t );
426 pndhup = strdup ( pndhup ); // so we don't just use the built in buffer; next locate will overwrite it
429 #if 0 // don't enable this; if no key in config, we don't want to bother hupping
431 pndhup = pnd_locate_filename ( run_searchpath, PND_PNDHUP_FILENAME );
438 if ( run_searchpath ) pnd_log ( pndn_rem, "Locating pnd run in %s\n", run_searchpath );
439 if ( run_script ) pnd_log ( pndn_rem, "Locating pnd runscript as %s\n", run_script );
440 if ( pndrun ) pnd_log ( pndn_rem, "pndrun is %s\n", pndrun );
442 pnd_log ( pndn_rem, "pndhup is %s\n", pndhup );
444 pnd_log ( pndn_rem, "No pndhup found (which is fine.)\n" );
447 /* cheap hack, maybe it'll help when pndnotifyd is coming up before the rest of the system and before
448 * the user is formally logged in
450 pnd_log ( pndn_rem, "Setting a default $HOME to non-root user\n" );
454 if ( ( dir = opendir ( "/home" ) ) ) {
455 struct dirent *dirent;
457 while ( ( dirent = readdir ( dir ) ) ) {
458 pnd_log ( pndn_rem, " Found user homedir '%s'\n", dirent -> d_name );
460 // file is a .desktop?
461 if ( dirent -> d_name [ 0 ] == '.' ) {
463 } else if ( strcmp ( dirent -> d_name, "root" ) == 0 ) {
467 // a non-root user is found
469 sprintf ( buffer, "/home/%s", dirent -> d_name );
470 pnd_log ( pndn_rem, " Going with '%s'\n", buffer );
471 setenv ( "HOME", buffer, 1 /* overwrite */ );
474 } // while iterating through dir listing
481 /* handle globbing or variable substitution
483 desktop_dotdesktoppath = pnd_expand_tilde ( strdup ( desktop_dotdesktoppath ) );
484 desktop_iconpath = pnd_expand_tilde ( strdup ( desktop_iconpath ) );
485 mkdir ( desktop_dotdesktoppath, 0777 );
486 mkdir ( desktop_iconpath, 0777 );
488 if ( menu_dotdesktoppath ) {
489 menu_dotdesktoppath = pnd_expand_tilde ( strdup ( menu_dotdesktoppath ) );
490 mkdir ( menu_dotdesktoppath, 0777 );
492 if ( menu_iconpath ) {
493 menu_iconpath = pnd_expand_tilde ( strdup ( menu_iconpath ) );
494 mkdir ( menu_iconpath, 0777 );
501 void setup_notifications ( void ) {
502 searchpath = notifypath;
504 // if this is first time through, we can just set it up; for subsequent times
505 // through, we need to close existing fd and re-open it, since we're too lame
506 // to store the list of watches and 'rm' them
509 pnd_notify_shutdown ( nh );
514 // set up a new set of notifies
516 nh = pnd_notify_init();
520 pnd_log ( pndn_rem, "INOTIFY failed to init.\n" );
525 pnd_log ( pndn_rem, "INOTIFY is up.\n" );
531 pnd_log ( pndn_rem, "Watching path '%s' and its descendents.\n", buffer );
532 pnd_notify_watch_path ( nh, buffer, PND_NOTIFY_RECURSE );
540 void sighup_handler ( int n ) {
542 pnd_log ( pndn_rem, "---[ SIGHUP received ]---\n" );
544 // reparse config files
545 consume_configuration();
547 // re set up the notifier watches
548 setup_notifications();
553 // This very recently was inline code; just slight refactor to functionize it so that it can be
554 // reused in a couple of places. Simple code with simple design quickly became too large for
555 // its simple design; should revisit a lot of these little things..
556 void process_discoveries ( pnd_box_handle applist, char *emitdesktoppath, char *emiticonpath ) {
557 pnd_disco_t *d = pnd_box_get_head ( applist );
561 pnd_log ( pndn_rem, "Found app: %s\n", pnd_box_get_key ( d ) );
563 // check if icon already exists (from a previous extraction say); if so, we needn't
565 char existingpath [ FILENAME_MAX ];
566 sprintf ( existingpath, "%s/%s.png", emiticonpath, d -> unique_id );
569 if ( stat ( existingpath, &dirs ) == 0 ) {
570 // icon seems to exist, so just crib the location into the .desktop
572 pnd_log ( pndn_rem, " Found icon already existed, so reusing it! %s\n", existingpath );
577 d -> icon = strdup ( existingpath );
580 // icon seems unreadable or does not exist; lets try to create it..
582 pnd_log ( pndn_debug, " Icon not already present, so trying to write it! %s\n", existingpath );
584 // attempt to create icon files; if successful, alter the disco struct to contain new
585 // path, otherwise leave it alone (since it could be a generic icon reference..)
586 if ( pnd_emit_icon ( emiticonpath, d ) ) {
587 // success; fix up icon path to new one..
591 d -> icon = strdup ( existingpath );
593 pnd_log ( pndn_debug, " WARN: Couldn't write out icon %s\n", existingpath );
596 } // icon already exists?
598 // create the .desktop file
599 if ( pnd_emit_dotdesktop ( emitdesktoppath, pndrun, d ) ) {
600 // add a watch onto the newly created .desktop?
602 char buffer [ FILENAME_MAX ];
603 sprintf ( buffer, "%s/%s", emitdesktoppath, d -> unique_id );
604 pnd_notify_watch_path ( nh, buffer, PND_NOTIFY_RECURSE );
607 pnd_log ( pndn_rem, "ERROR: Error creating .desktop file for app: %s\n", pnd_box_get_key ( d ) );
610 // does this object request any mkdir's?
611 if ( d -> mkdir_sp ) {
613 // it would appear it does! but we have to carefully validate these suckers
614 pnd_log ( pndn_rem, " App %s requests mkdir: %s\n", d -> object_path, d -> mkdir_sp );
616 // for each mkdir requested path, do it...
617 char *searchpath = d -> mkdir_sp;
621 /* "buffer" now holds each chunk of the searchpath, expanded */
623 // WARN: This whole concept could be flawed; what if they represent '..' in some other obscure way (unicode?)
624 // and we end up allowing mkdir's all over the place? The risk really is limited -- once the pnd is here,
625 // if the user _runs it_, it can go nuts, so creating a few dirs isn't all that dangerous...
627 // Perhaps I should have a config setting for pndnotifyd to suppress this whole mkdir behaviour?
629 // if not containing ".." we allow it
630 if ( strstr ( buffer, ".." ) == NULL ) {
632 // determine mountpoint for the file
633 // - we could deduce this from the path (somewhat risky if we assume leading /media/mmcblk1p1 type notation .. could
634 // be other distributions entirely
635 // - better to scan through mount-list and figure it out.. *sucks*
636 char mountpoint [ PATH_MAX ];
637 if ( pnd_determine_mountpoint ( d -> object_path, mountpoint, PATH_MAX - strlen ( buffer ) - 1 ) == 1 ) {
639 strcat ( mountpoint, "/" );
640 strcat ( mountpoint, buffer );
643 if ( stat ( mountpoint, &t ) == 0 ) {
644 pnd_log ( pndn_rem, " Skipping existing mkdir: %s\n", mountpoint );
646 pnd_log ( pndn_rem, " Attempting create of non-existant path: %s\n", mountpoint );
647 mkdir ( mountpoint, 0777 );
650 } // if figured out the mountpoint
660 d = pnd_box_get_next ( d );
667 // returns true if any applications were found
668 unsigned char perform_discoveries ( char *appspath, char *overridespath, // args to do discovery
669 char *emitdesktoppath, char *emiticonpath ) // args to do emitting
671 pnd_box_handle applist;
673 pnd_log ( pndn_rem, "perform discovery - apps: %s, overrides: %s\n", appspath, overridespath );
674 pnd_log ( pndn_rem, " - emit desktop: %s, icons: %s\n", emitdesktoppath, emiticonpath );
676 // attempt to auto-discover applications in the given path
677 applist = pnd_disco_search ( appspath, overridespath );
680 process_discoveries ( applist, emitdesktoppath, emiticonpath );
683 // run a clean up, to remove any dotdesktop files that we didn't
684 // just now create (that seem to have been created by pndnotifyd
685 // previously.) This allows SD eject (or .pnd remove) to remove
686 // an app from the launcher
687 // NOTE: Could opendir and iterate across all .desktop files,
688 // removing any that have Source= something else, and that the
689 // app name is not in the list found in applist box above. But
690 // a cheesy simple way right now is to just remove .desktop files
691 // that have a last mod time prior to the time we stored above.
695 if ( ( dir = opendir ( emitdesktoppath ) ) ) {
696 struct dirent *dirent;
698 char buffer [ FILENAME_MAX ];
700 while ( ( dirent = readdir ( dir ) ) ) {
702 // file is a .desktop?
703 if ( strstr ( dirent -> d_name, ".desktop" ) == NULL ) {
707 // figure out full path
708 sprintf ( buffer, "%s/%s", emitdesktoppath, dirent -> d_name );
710 // file was previously created by libpnd; check Source= line
711 // logic: default to 'yes' (in case we can't open the file for some reason)
712 // if we can open the file, default to no and look for the source flag we added; if
713 // that matches then we know its libpnd created, otherwise assume not.
714 unsigned char source_libpnd = 1;
717 FILE *grep = fopen ( buffer, "r" );
720 while ( fgets ( line, 255, grep ) ) {
721 if ( strcasestr ( line, PND_DOTDESKTOP_SOURCE ) ) {
728 if ( source_libpnd ) {
730 pnd_log ( pndn_debug,
731 "File '%s' appears to have been created by libpnd so candidate for delete: %u\n", buffer, source_libpnd );
735 pnd_log ( pndn_debug, "File '%s' appears NOT to have been created by libpnd, so leave it alone\n", buffer );
737 continue; // skip deleting it
741 if ( stat ( buffer, &dirs ) == 0 ) {
742 if ( dirs.st_mtime >= createtime ) {
744 pnd_log ( pndn_debug, "File '%s' seems 'new', so leave it alone.\n", buffer );
746 continue; // skip deleting it
750 // by this point, the .desktop file must be 'old' and created by pndnotifyd
751 // previously, so can remove it
752 pnd_log ( pndn_rem, "File '%s' seems nolonger relevent; removing it.\n", dirent -> d_name );
755 } // while getting filenames from dir
760 } // purge old .desktop files
762 //WARN: MEMORY LEAK HERE
763 pnd_log ( pndn_debug, "pndnotifyd - memory leak here - perform_discoveries()\n" );
765 pnd_box_delete ( applist ); // does not free the disco_t contents!