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"
30 #include "pnd_dbusnotify.h"
32 // this piece of code was simpler once; but need to grow it a bit and in a rush
33 // moving all these to globals rather than refactor the code a bit; tsk tsk..
35 // op mode; emitting stdout or no?
36 static unsigned char g_daemon_mode = 0;
40 pndn_rem, // will set default log level to here, so 'debug' is omitted
44 } pndnotify_loglevels_e;
50 char *searchpath = NULL;
51 char *notifypath = NULL;
52 time_t createtime = 0; // all 'new' .destops are created at or after this time; prev are old.
53 // dotfiles; this used to be a single pai .. now two pairs, a little unwieldy; pnd_box it up?
54 char *desktop_dotdesktoppath = NULL;
55 char *desktop_iconpath = NULL;
56 char *desktop_appspath = NULL;
57 char *menu_dotdesktoppath = NULL;
58 char *menu_iconpath = NULL;
59 char *menu_appspath = NULL;
61 char *run_searchpath; // searchpath to find pnd_run.sh
62 char *run_script; // name of pnd_run.sh script from config
63 char *pndrun; // full path to located pnd_run.sh
64 char *pndhup = NULL; // full path to located pnd_hup.sh
66 char g_username [ 128 ]; // since we have to wait for login (!!), store username here
68 pnd_notify_handle nh = 0;
69 pnd_dbusnotify_handle dbh = 0;
72 #define PNDNOTIFYD_LOGLEVEL "pndnotifyd.loglevel"
75 void consume_configuration ( void );
76 void setup_notifications ( void );
77 void sigint_handler ( int n );
78 void sighup_handler ( int n );
79 void process_discoveries ( pnd_box_handle applist, char *emitdesktoppath, char *emiticonpath );
80 unsigned char perform_discoveries ( char *appspath, char *overridespath,
81 char *emitdesktoppath, char *emiticonpath );
83 int main ( int argc, char *argv[] ) {
85 unsigned char scanonlaunch = 1;
86 unsigned int interval_secs = 5;
87 int logall = -1; // -1 means normal logging rules; >=0 means log all!
91 /* iterate across args
93 for ( i = 1; i < argc; i++ ) {
95 if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'd' ) {
96 //printf ( "Going daemon mode. Silent running.\n" );
98 } else if ( isdigit ( argv [ i ][ 0 ] ) ) {
99 interval_secs = atoi ( argv [ i ] );
100 } else if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'n' ) {
102 } else if ( argv [ i ][ 0 ] == '-' && argv [ i ][ 1 ] == 'l' ) {
104 if ( isdigit ( argv [ i ][ 2 ] ) ) {
105 unsigned char x = atoi ( argv [ i ] + 2 );
116 printf ( "%s [-d] [##]\n", argv [ 0 ] );
117 printf ( "-d\tDaemon mode; detach from terminal, chdir to /tmp, suppress output. Optional.\n" );
118 printf ( "-n\tDo not scan on launch; default is to run a scan for apps when %s is invoked.\n", argv [ 0 ] );
119 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" );
120 printf ( "##\tA numeric value is interpreted as number of seconds between checking for filesystem changes. Default %u.\n",
122 printf ( "Signal: HUP the process to force reload of configuration and reset the notifier watch paths\n" );
130 pnd_log_set_pretext ( "pndnotifyd" );
131 pnd_log_set_flush ( 1 );
133 if ( logall == -1 ) {
134 // standard logging; non-daemon versus daemon
136 if ( g_daemon_mode ) {
139 pnd_log_set_filter ( pndn_rem );
146 f = fopen ( "/tmp/pndnotifyd.log", "w" );
149 pnd_log_set_filter ( logall );
150 pnd_log_to_stream ( f );
151 pnd_log ( pndn_rem, "logall mode - logging to /tmp/pndnotifyd.log\n" );
154 if ( logall == pndn_debug ) {
155 pnd_log_set_buried_logging ( 1 ); // log the shit out of it
156 pnd_log ( pndn_rem, "logall mode 0 - turned on buried logging\n" );
161 pnd_log ( pndn_rem, "%s built %s %s", argv [ 0 ], __DATE__, __TIME__ );
163 pnd_log ( pndn_rem, "log level starting as %u", pnd_log_get_filter() );
165 pnd_log ( pndn_rem, "Interval between checks is %u seconds\n", interval_secs );
167 // check if inotify is awake yet; if not, try waiting for awhile to see if it does
168 pnd_log ( pndn_rem, "Starting INOTIFY test; should be instant, but may take awhile...\n" );
170 if ( ! pnd_notify_wait_until_ready ( 120 /* seconds */ ) ) {
171 pnd_log ( pndn_error, "ERROR: INOTIFY refuses to be useful and quite awhile has passed. Bailing out.\n" );
175 pnd_log ( pndn_rem, "INOTIFY seems to be useful, whew.\n" );
177 // basic daemon set up
178 if ( g_daemon_mode ) {
180 // set a CWD somewhere else
185 // detach from terminal
186 if ( ( i = fork() ) < 0 ) {
187 pnd_log ( pndn_error, "ERROR: Couldn't fork()\n" );
191 exit ( 0 ); // exit parent
196 umask ( 022 ); // emitted files can be rwxr-xr-x
200 // wait for a user to be logged in - we should probably get hupped when a user logs in, so we can handle
201 // log-out and back in again, with SDs popping in and out between..
202 pnd_log ( pndn_rem, "Checking to see if a user is logged in\n" );
204 if ( pnd_check_login ( g_username, 127 ) ) {
207 pnd_log ( pndn_debug, " No one logged in yet .. spinning.\n" );
210 pnd_log ( pndn_rem, "Looks like user '%s' is in, continue.\n", g_username );
215 consume_configuration();
220 pnd_log ( pndn_rem, "PXML overrides searchpath is '%s'\n", overridespath );
221 pnd_log ( pndn_rem, "Notify searchpath is '%s'\n", notifypath );
223 pnd_log ( pndn_rem, "Desktop apps ---------------------------------\n" );
224 pnd_log ( pndn_rem, "Apps searchpath is '%s'\n", desktop_appspath );
225 pnd_log ( pndn_rem, ".desktop files emit to '%s'\n", desktop_dotdesktoppath );
226 pnd_log ( pndn_rem, ".desktop icon files emit to '%s'\n", desktop_iconpath );
228 pnd_log ( pndn_rem, "Menu apps ---------------------------------\n" );
229 pnd_log ( pndn_rem, "Apps searchpath is '%s'\n", menu_appspath );
230 pnd_log ( pndn_rem, ".desktop files emit to '%s'\n", menu_dotdesktoppath );
231 pnd_log ( pndn_rem, ".desktop icon files emit to '%s'\n", menu_iconpath );
233 /* set up signal handler
238 struct sigaction siggy;
239 siggy.sa_handler = sighup_handler;
240 siggy.sa_mask = ss; /* implicitly blocks the origin signal */
241 siggy.sa_flags = 0; /* don't need anything */
243 sigaction ( SIGHUP, &siggy, NULL );
245 siggy.sa_handler = sigint_handler;
246 sigaction ( SIGINT, &siggy, NULL );
251 // if we're gong to scan on launch, it'll set things right up and then set up notifications.
252 // if no scan on launch, we need to set the notif's up now.
253 //if ( ! scanonlaunch ) {
254 setup_notifications();
257 dbh = pnd_dbusnotify_init();
261 unsigned char watch_inotify, watch_dbus;
268 watch_dbus = pnd_dbusnotify_rediscover_p ( dbh );
271 if ( ! watch_dbus && nh ) {
272 watch_inotify = pnd_notify_rediscover_p ( nh );
275 // need to rediscover?
276 if ( scanonlaunch || watch_inotify || watch_dbus ) {
278 // by this point, the watched directories have notified us that something of relevent
279 // has occurred; we should be clever, but we're not, so just re-brute force the
280 // discovery and spit out .desktop files..
281 pnd_log ( pndn_rem, "------------------------------------------------------\n" );
283 pnd_log ( pndn_rem, "System changes detected in dbus or watched paths .. performing re-discover!\n" );
285 // if this was a forced scan, lets not do that next iteration
286 if ( scanonlaunch ) {
287 pnd_log ( pndn_rem, "scan-on-first-launch detected an event\n" );
291 if ( watch_inotify ) {
292 pnd_log ( pndn_rem, "inotify detected an event\n" );
296 pnd_log ( pndn_rem, "dbusnotify detected an event\n" );
297 pnd_notify_shutdown ( nh );
301 if ( time ( NULL ) - createtime <= 2 ) {
302 pnd_log ( pndn_rem, "Rediscovery request comes to soon after previous discovery; skipping.\n" );
303 sleep ( interval_secs );
307 pnd_log ( pndn_rem, "------------------------------------------------------\n" );
309 createtime = time ( NULL ); // all 'new' .destops are created at or after this time; prev are old.
314 pnd_log ( pndn_rem, " Scanning desktop paths----------------------------\n" );
315 if ( ! perform_discoveries ( desktop_appspath, overridespath, desktop_dotdesktoppath, desktop_iconpath ) ) {
316 pnd_log ( pndn_rem, " No applications found in desktop search path\n" );
319 if ( menu_appspath && menu_dotdesktoppath && menu_iconpath ) {
320 pnd_log ( pndn_rem, " Scanning menu paths----------------------------\n" );
321 if ( ! perform_discoveries ( menu_appspath, overridespath, menu_dotdesktoppath, menu_iconpath ) ) {
322 pnd_log ( pndn_rem, " No applications found in menu search path\n" );
326 // if we've got a hup script located, lets invoke it
328 pnd_log ( pndn_rem, "Invoking hup script '%s'.\n", pndhup );
329 pnd_exec_no_wait_1 ( pndhup, NULL );
332 // since its entirely likely new directories have been found (ie: SD with a directory structure was inserted)
333 // we should re-apply watches to catch all these new directories; ie: user might use on-device browser to
334 // drop in new applications, or use the shell to juggle them around, or any number of activities.
336 setup_notifications();
339 } // need to rediscover?
341 // lets not eat up all the CPU
342 // should use an alarm or select() or something -- I mean really, why aren't I putting interval_secs into
343 // the select() call above in pnd_notify_whatsitcalled()? -- but lets not break this right before release shall we
344 // NOTE: Oh right, I remember now -- inotify will spam when a card is inserted, and it will not be instantaneoous..
345 // the events will dribble in over a second. So this sleep is a lame trick that generally works. I really should
346 // do select(), and then when it returns just spin for a couple seconds slurping up events until no more and a thresh-hold
347 // time is hit, but this will do for now. I suck.
348 sleep ( interval_secs );
354 pnd_notify_shutdown ( nh );
355 pnd_dbusnotify_shutdown ( dbh );
360 void consume_configuration ( void ) {
362 // attempt to fetch a sensible default searchpath for configs
363 configpath = pnd_conf_query_searchpath();
365 // attempt to fetch the apps config to pick up a searchpath
366 pnd_conf_handle apph;
368 apph = pnd_conf_fetch_by_id ( pnd_conf_apps, configpath );
372 overridespath = pnd_conf_get_as_char ( apph, PND_PXML_OVERRIDE_KEY );
374 if ( ! overridespath ) {
375 overridespath = PND_PXML_OVERRIDE_SEARCHPATH;
378 notifypath = pnd_conf_get_as_char ( apph, PND_APPS_NOTIFY_KEY );
380 if ( ! notifypath ) {
381 notifypath = PND_APPS_NOTIFYPATH;
385 // couldn't find a useful app search path so use the default
386 overridespath = PND_PXML_OVERRIDE_SEARCHPATH;
387 notifypath = PND_APPS_NOTIFYPATH;
390 // attempt to figure out where to drop dotfiles .. now that we're going
391 // multi-target we see the limit of my rudimentary conf-file parser; should
392 // just parse to an array of targets, rather that hardcoding two, but
393 // on the other hand, don't likely see the need for more than two? (famous
395 pnd_conf_handle desktoph;
397 desktoph = pnd_conf_fetch_by_id ( pnd_conf_desktop, configpath );
399 // for 'desktop' main applications
401 desktop_dotdesktoppath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_DOTDESKTOP_PATH_KEY );
402 desktop_iconpath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_ICONS_PATH_KEY );
403 desktop_appspath = pnd_conf_get_as_char ( desktoph, PND_DESKTOP_SEARCH_KEY );
406 if ( ! desktop_dotdesktoppath ) {
407 desktop_dotdesktoppath = PND_DESKTOP_DOTDESKTOP_PATH_DEFAULT;
410 if ( ! desktop_iconpath ) {
411 desktop_iconpath = PND_DESKTOP_ICONS_PATH_DEFAULT;
414 if ( ! desktop_appspath ) {
415 desktop_appspath = PND_DESKTOP_SEARCH_PATH_DEFAULT;
418 // for 'menu' applications
420 menu_dotdesktoppath = pnd_conf_get_as_char ( desktoph, PND_MENU_DOTDESKTOP_PATH_KEY );
421 menu_iconpath = pnd_conf_get_as_char ( desktoph, PND_MENU_ICONS_PATH_KEY );
422 menu_appspath = pnd_conf_get_as_char ( desktoph, PND_MENU_SEARCH_KEY );
425 /* try to locate a runscript and optional hupscript
429 run_searchpath = pnd_conf_get_as_char ( apph, PND_PNDRUN_SEARCHPATH_KEY );
430 run_script = pnd_conf_get_as_char ( apph, PND_PNDRUN_KEY );
433 if ( ! run_searchpath ) {
434 run_searchpath = PND_APPS_SEARCHPATH;
435 run_script = PND_PNDRUN_FILENAME;
438 if ( pnd_conf_get_as_int ( apph, PNDNOTIFYD_LOGLEVEL ) != PND_CONF_BADNUM ) {
439 if ( pnd_log_do_buried_logging() == 0 ) {
440 pnd_log_set_filter ( pnd_conf_get_as_int ( apph, PNDNOTIFYD_LOGLEVEL ) );
441 pnd_log ( pndn_rem, "config file causes loglevel to change to %u", pnd_log_get_filter() );
443 pnd_log ( pndn_rem, "-l command line suppresses log level change in config file\n" );
448 run_searchpath = NULL;
450 pndrun = PND_PNDRUN_DEFAULT;
454 pndrun = pnd_locate_filename ( run_searchpath, run_script );
457 pndrun = strdup ( pndrun ); // so we don't just use the built in buffer; next locate will overwrite it
459 pndrun = PND_PNDRUN_DEFAULT;
464 if ( desktoph && run_searchpath ) {
467 if ( ( t = pnd_conf_get_as_char ( desktoph, PND_PNDHUP_KEY ) ) ) {
468 pndhup = pnd_locate_filename ( run_searchpath, t );
471 pndhup = strdup ( pndhup ); // so we don't just use the built in buffer; next locate will overwrite it
474 #if 0 // don't enable this; if no key in config, we don't want to bother hupping
476 pndhup = pnd_locate_filename ( run_searchpath, PND_PNDHUP_FILENAME );
483 if ( run_searchpath ) pnd_log ( pndn_rem, "Locating pnd run in %s\n", run_searchpath );
484 if ( run_script ) pnd_log ( pndn_rem, "Locating pnd runscript as %s\n", run_script );
485 if ( pndrun ) pnd_log ( pndn_rem, "pndrun is %s\n", pndrun );
487 pnd_log ( pndn_rem, "pndhup is %s\n", pndhup );
489 pnd_log ( pndn_rem, "No pndhup found (which is fine.)\n" );
492 /* cheap hack, maybe it'll help when pndnotifyd is coming up before the rest of the system and before
493 * the user is formally logged in
495 pnd_log ( pndn_rem, "Setting a default $HOME to non-root user\n" );
497 // first, try to see if known-username maps to a homedir; if so, just use that!
498 // otherwise, pick first non-root homedir and assume .. or we start blaring .desktops
499 // out to all users like idiots
500 unsigned char got_user_homedir = 0;
502 if ( g_username [ 0 ] ) {
504 char path [ PATH_MAX ];
506 sprintf ( path, "/home/%s", g_username );
508 // does this made up path exist?
509 if ( stat ( path, &homedir ) == 0 ) {
512 if ( S_ISDIR(homedir.st_mode) ) {
513 pnd_log ( pndn_rem, " User [%s] matches path [%s], going with '%s'\n", g_username, path, path );
514 setenv ( "HOME", path, 1 /* overwrite */ );
515 got_user_homedir = 1;
518 } // guessing a homedirname..
522 // if guessing a path was no good, just try finding one
523 if ( got_user_homedir == 0 ) {
526 if ( ( dir = opendir ( "/home" ) ) ) {
527 struct dirent *dirent;
529 while ( ( dirent = readdir ( dir ) ) ) {
530 pnd_log ( pndn_rem, " Scanning user homedir '%s'\n", dirent -> d_name );
532 // file is a .desktop?
533 if ( dirent -> d_name [ 0 ] == '.' ) {
535 } else if ( strcmp ( dirent -> d_name, "root" ) == 0 ) {
539 // a non-root user is found
541 sprintf ( buffer, "/home/%s", dirent -> d_name );
542 pnd_log ( pndn_rem, " Going with '%s'\n", buffer );
543 setenv ( "HOME", buffer, 1 /* overwrite */ );
546 } // while iterating through dir listing
553 /* handle globbing or variable substitution
555 desktop_dotdesktoppath = pnd_expand_tilde ( strdup ( desktop_dotdesktoppath ) );
556 desktop_iconpath = pnd_expand_tilde ( strdup ( desktop_iconpath ) );
557 mkdir ( desktop_dotdesktoppath, 0777 );
558 mkdir ( desktop_iconpath, 0777 );
560 if ( menu_dotdesktoppath ) {
561 menu_dotdesktoppath = pnd_expand_tilde ( strdup ( menu_dotdesktoppath ) );
562 mkdir ( menu_dotdesktoppath, 0777 );
564 if ( menu_iconpath ) {
565 menu_iconpath = pnd_expand_tilde ( strdup ( menu_iconpath ) );
566 mkdir ( menu_iconpath, 0777 );
573 void setup_notifications ( void ) {
574 searchpath = notifypath;
576 // if this is first time through, we can just set it up; for subsequent times
577 // through, we need to close existing fd and re-open it, since we're too lame
578 // to store the list of watches and 'rm' them
581 pnd_notify_shutdown ( nh );
586 // set up a new set of notifies
588 nh = pnd_notify_init();
592 pnd_log ( pndn_rem, "INOTIFY failed to init.\n" );
597 pnd_log ( pndn_rem, "INOTIFY is up.\n" );
603 pnd_log ( pndn_rem, "Watching path '%s' and its descendents.\n", buffer );
604 pnd_notify_watch_path ( nh, buffer, PND_NOTIFY_RECURSE );
606 //pnd_notify_watch_path ( nh, buffer, 0 /* no recurse */ );
612 sleep ( 1 ); // wait for events to trigger?
614 // clear out any notifies we just created
615 while ( pnd_notify_rediscover_p ( nh ) ) {
616 usleep ( 100 ); // spin
623 void sighup_handler ( int n ) {
625 pnd_log ( pndn_rem, "---[ SIGHUP received ]---\n" );
627 // reparse config files
628 consume_configuration();
630 // re set up the notifier watches
631 setup_notifications();
636 void sigint_handler ( int n ) {
638 pnd_log ( pndn_rem, "---[ SIGINT received ]---\n" );
641 pnd_dbusnotify_shutdown ( dbh );
645 pnd_notify_shutdown ( nh );
651 // This very recently was inline code; just slight refactor to functionize it so that it can be
652 // reused in a couple of places. Simple code with simple design quickly became too large for
653 // its simple design; should revisit a lot of these little things..
654 void process_discoveries ( pnd_box_handle applist, char *emitdesktoppath, char *emiticonpath ) {
655 pnd_disco_t *d = pnd_box_get_head ( applist );
659 pnd_log ( pndn_rem, "Found app: %s\n", pnd_box_get_key ( d ) );
661 // check if icon already exists (from a previous extraction say); if so, we needn't
663 char existingpath [ FILENAME_MAX ];
664 sprintf ( existingpath, "%s/%s.png", emiticonpath, d -> unique_id /*, d -> subapp_number */ );
667 if ( stat ( existingpath, &dirs ) == 0 ) {
668 // icon seems to exist, so just crib the location into the .desktop
670 pnd_log ( pndn_rem, " Found icon already existed, so reusing it! %s\n", existingpath );
675 d -> icon = strdup ( existingpath );
678 // icon seems unreadable or does not exist; lets try to create it..
680 pnd_log ( pndn_debug, " Icon not already present, so trying to write it! %s\n", existingpath );
682 // attempt to create icon files; if successful, alter the disco struct to contain new
683 // path, otherwise leave it alone (since it could be a generic icon reference..)
684 if ( pnd_emit_icon ( emiticonpath, d ) ) {
685 // success; fix up icon path to new one..
689 d -> icon = strdup ( existingpath );
691 pnd_log ( pndn_debug, " WARN: Couldn't write out icon %s\n", existingpath );
694 } // icon already exists?
696 // create the .desktop file
697 if ( pnd_emit_dotdesktop ( emitdesktoppath, pndrun, d ) ) {
698 // add a watch onto the newly created .desktop?
700 char buffer [ FILENAME_MAX ];
701 sprintf ( buffer, "%s/%s", emitdesktoppath, d -> unique_id );
702 pnd_notify_watch_path ( nh, buffer, PND_NOTIFY_RECURSE );
705 pnd_log ( pndn_rem, "ERROR: Error creating .desktop file for app: %s\n", pnd_box_get_key ( d ) );
708 // does this object request any mkdir's?
709 if ( d -> mkdir_sp ) {
711 // it would appear it does! but we have to carefully validate these suckers
712 pnd_log ( pndn_rem, " App %s requests mkdir: %s\n", d -> object_path, d -> mkdir_sp );
714 // for each mkdir requested path, do it...
715 char *searchpath = d -> mkdir_sp;
719 /* "buffer" now holds each chunk of the searchpath, expanded */
721 // WARN: This whole concept could be flawed; what if they represent '..' in some other obscure way (unicode?)
722 // and we end up allowing mkdir's all over the place? The risk really is limited -- once the pnd is here,
723 // if the user _runs it_, it can go nuts, so creating a few dirs isn't all that dangerous...
725 // Perhaps I should have a config setting for pndnotifyd to suppress this whole mkdir behaviour?
727 // if not containing ".." we allow it
728 if ( strstr ( buffer, ".." ) == NULL ) {
730 // determine mountpoint for the file
731 // - we could deduce this from the path (somewhat risky if we assume leading /media/mmcblk1p1 type notation .. could
732 // be other distributions entirely
733 // - better to scan through mount-list and figure it out.. *sucks*
734 char mountpoint [ PATH_MAX ];
735 if ( pnd_determine_mountpoint ( d -> object_path, mountpoint, PATH_MAX - strlen ( buffer ) - 1 ) == 1 ) {
737 strcat ( mountpoint, "/" );
738 strcat ( mountpoint, buffer );
741 if ( stat ( mountpoint, &t ) == 0 ) {
742 pnd_log ( pndn_rem, " Skipping existing mkdir: %s\n", mountpoint );
744 pnd_log ( pndn_rem, " Attempting create of non-existant path: %s\n", mountpoint );
745 mkdir ( mountpoint, 0777 );
748 } // if figured out the mountpoint
758 d = pnd_box_get_next ( d );
765 // returns true if any applications were found
766 unsigned char perform_discoveries ( char *appspath, char *overridespath, // args to do discovery
767 char *emitdesktoppath, char *emiticonpath ) // args to do emitting
769 pnd_box_handle applist;
771 pnd_log ( pndn_rem, "perform discovery - apps: %s, overrides: %s\n", appspath, overridespath );
772 pnd_log ( pndn_rem, " - emit desktop: %s, icons: %s\n", emitdesktoppath, emiticonpath );
774 // attempt to auto-discover applications in the given path
775 applist = pnd_disco_search ( appspath, overridespath );
778 process_discoveries ( applist, emitdesktoppath, emiticonpath );
781 // run a clean up, to remove any dotdesktop files that we didn't
782 // just now create (that seem to have been created by pndnotifyd
783 // previously.) This allows SD eject (or .pnd remove) to remove
784 // an app from the launcher
785 // NOTE: Could opendir and iterate across all .desktop files,
786 // removing any that have Source= something else, and that the
787 // app name is not in the list found in applist box above. But
788 // a cheesy simple way right now is to just remove .desktop files
789 // that have a last mod time prior to the time we stored above.
793 if ( ( dir = opendir ( emitdesktoppath ) ) ) {
794 struct dirent *dirent;
796 char buffer [ FILENAME_MAX ];
798 while ( ( dirent = readdir ( dir ) ) ) {
800 // file is a .desktop?
801 if ( strstr ( dirent -> d_name, ".desktop" ) == NULL ) {
805 // figure out full path
806 sprintf ( buffer, "%s/%s", emitdesktoppath, dirent -> d_name );
808 // file was previously created by libpnd; check Source= line
809 // logic: default to 'yes' (in case we can't open the file for some reason)
810 // if we can open the file, default to no and look for the source flag we added; if
811 // that matches then we know its libpnd created, otherwise assume not.
812 unsigned char source_libpnd = 1;
815 FILE *grep = fopen ( buffer, "r" );
818 while ( fgets ( line, 255, grep ) ) {
819 if ( strcasestr ( line, PND_DOTDESKTOP_SOURCE ) ) {
826 if ( source_libpnd ) {
828 pnd_log ( pndn_debug,
829 "File '%s' appears to have been created by libpnd so candidate for delete: %u\n", buffer, source_libpnd );
833 pnd_log ( pndn_debug, "File '%s' appears NOT to have been created by libpnd, so leave it alone\n", buffer );
835 continue; // skip deleting it
839 if ( stat ( buffer, &dirs ) == 0 ) {
840 if ( dirs.st_mtime >= createtime ) {
842 pnd_log ( pndn_debug, "File '%s' seems 'new', so leave it alone.\n", buffer );
844 continue; // skip deleting it
848 // by this point, the .desktop file must be 'old' and created by pndnotifyd
849 // previously, so can remove it
850 pnd_log ( pndn_rem, "File '%s' seems nolonger relevent; removing it.\n", dirent -> d_name );
853 } // while getting filenames from dir
858 } // purge old .desktop files
860 //WARN: MEMORY LEAK HERE
861 pnd_log ( pndn_debug, "pndnotifyd - memory leak here - perform_discoveries()\n" );
863 pnd_box_delete ( applist ); // does not free the disco_t contents!