libinotifytools
inotifytools.c
1// kate: replace-tabs off; space-indent off;
2
15#include "../../config.h"
17#include "inotifytools_p.h"
18
19#include <string.h>
20#include <strings.h>
21#include <stdlib.h>
22#include <stdio.h>
23#include <errno.h>
24#include <sys/select.h>
25#include <sys/types.h>
26#include <sys/stat.h>
27#include <sys/ioctl.h>
28#include <unistd.h>
29#include <dirent.h>
30#include <time.h>
31#include <regex.h>
32#include <setjmp.h>
33
34#include "inotifytools/inotify.h"
35
122#define MAX_EVENTS 4096
123#define MAX_STRLEN 4096
124#define INOTIFY_PROCDIR "/proc/sys/fs/inotify/"
125#define WATCHES_SIZE_PATH INOTIFY_PROCDIR "max_user_watches"
126#define QUEUE_SIZE_PATH INOTIFY_PROCDIR "max_queued_watches"
127#define INSTANCES_PATH INOTIFY_PROCDIR "max_user_instances"
128
129static int inotify_fd;
130static unsigned num_access;
131static unsigned num_modify;
132static unsigned num_attrib;
133static unsigned num_close_nowrite;
134static unsigned num_close_write;
135static unsigned num_open;
136static unsigned num_move_self;
137static unsigned num_moved_to;
138static unsigned num_moved_from;
139static unsigned num_create;
140static unsigned num_delete;
141static unsigned num_delete_self;
142static unsigned num_unmount;
143static unsigned num_total;
144static int collect_stats = 0;
145
146struct rbtree *tree_wd = 0;
147struct rbtree *tree_filename = 0;
148static int error = 0;
149static int init = 0;
150static char* timefmt = 0;
151static regex_t* regex = 0;
152
153int isdir( char const * path );
154void record_stats( struct inotify_event const * event );
155int onestr_to_event(char const * event);
156
174#define niceassert(cond,mesg) _niceassert((long)cond, __LINE__, __FILE__, \
175 #cond, mesg)
176
177#define nasprintf(...) niceassert( -1 != asprintf(__VA_ARGS__), "out of memory")
178
196void _niceassert( long cond, int line, char const * file, char const * condstr,
197 char const * mesg ) {
198 if ( cond ) return;
199
200 if ( mesg ) {
201 fprintf(stderr, "%s:%d assertion ( %s ) failed: %s\n", file, line,
202 condstr, mesg );
203 }
204 else {
205 fprintf(stderr, "%s:%d assertion ( %s ) failed.\n", file, line, condstr);
206 }
207}
208
218char * chrtostr(char ch) {
219 static char str[2] = { '\0', '\0' };
220 str[0] = ch;
221 return str;
222}
223
227int read_num_from_file( char * filename, int * num ) {
228 FILE * file = fopen( filename, "r" );
229 if ( !file ) {
230 error = errno;
231 return 0;
232 }
233
234 if ( EOF == fscanf( file, "%d", num ) ) {
235 error = errno;
236 return 0;
237 }
238
239 niceassert( 0 == fclose( file ), 0 );
240
241 return 1;
242}
243
244int wd_compare(const void *d1, const void *d2, const void *config) {
245 if (!d1 || !d2) return d1 - d2;
246 return ((watch*)d1)->wd - ((watch*)d2)->wd;
247}
248
249int filename_compare(const void *d1, const void *d2, const void *config) {
250 if (!d1 || !d2) return d1 - d2;
251 return strcmp(((watch*)d1)->filename, ((watch*)d2)->filename);
252}
253
257watch *watch_from_wd( int wd ) {
258 watch w;
259 w.wd = wd;
260 return (watch*)rbfind(&w, tree_wd);
261}
262
266watch *watch_from_filename( char const *filename ) {
267 watch w;
268 w.filename = (char*)filename;
269 return (watch*)rbfind(&w, tree_filename);
270}
271
282 if (init) return 1;
283
284 error = 0;
285 // Try to initialise inotify
286 inotify_fd = inotify_init();
287 if (inotify_fd < 0) {
288 error = inotify_fd;
289 return 0;
290 }
291
292 collect_stats = 0;
293 init = 1;
294 tree_wd = rbinit(wd_compare, 0);
295 tree_filename = rbinit(filename_compare, 0);
296 timefmt = 0;
297
298 return 1;
299}
300
304void destroy_watch(watch *w) {
305 if (w->filename) free(w->filename);
306 free(w);
307}
308
312void cleanup_tree(const void *nodep,
313 const VISIT which,
314 const int depth, void* arg) {
315 if (which != endorder && which != leaf) return;
316 watch *w = (watch*)nodep;
317 destroy_watch(w);
318}
319
327 if (!init) return;
328
329 init = 0;
330 close(inotify_fd);
331 collect_stats = 0;
332 error = 0;
333 timefmt = 0;
334
335 if (regex) {
336 regfree(regex);
337 free(regex);
338 regex = 0;
339 }
340
341 rbwalk(tree_wd, cleanup_tree, 0);
342 rbdestroy(tree_wd); tree_wd = 0;
343 rbdestroy(tree_filename); tree_filename = 0;
344}
345
349void empty_stats(const void *nodep,
350 const VISIT which,
351 const int depth, void *arg) {
352 if (which != endorder && which != leaf) return;
353 watch *w = (watch*)nodep;
354 w->hit_access = 0;
355 w->hit_modify = 0;
356 w->hit_attrib = 0;
357 w->hit_close_nowrite = 0;
358 w->hit_close_write = 0;
359 w->hit_open = 0;
360 w->hit_move_self = 0;
361 w->hit_moved_from = 0;
362 w->hit_moved_to = 0;
363 w->hit_create = 0;
364 w->hit_delete = 0;
365 w->hit_delete_self = 0;
366 w->hit_unmount = 0;
367 w->hit_total = 0;
368}
369
373void replace_filename(const void *nodep,
374 const VISIT which,
375 const int depth, void *arg) {
376 if (which != endorder && which != leaf) return;
377 watch *w = (watch*)nodep;
378 char *old_name = ((char**)arg)[0];
379 char *new_name = ((char**)arg)[1];
380 int old_len = *((int*)&((char**)arg)[2]);
381 char *name;
382 if ( 0 == strncmp( old_name, w->filename, old_len ) ) {
383 nasprintf( &name, "%s%s", new_name, &(w->filename[old_len]) );
384 if (!strcmp( w->filename, new_name )) {
385 free(name);
386 } else {
387 rbdelete(w, tree_filename);
388 free( w->filename );
389 w->filename = name;
390 rbsearch(w, tree_filename);
391 }
392 }
393}
394
398void get_num(const void *nodep,
399 const VISIT which,
400 const int depth, void *arg) {
401 if (which != endorder && which != leaf) return;
402 ++(*((int*)arg));
403}
404
405
419 niceassert( init, "inotifytools_initialize not called yet" );
420
421 // if already collecting stats, reset stats
422 if (collect_stats) {
423 rbwalk(tree_wd, empty_stats, 0);
424 }
425
426 num_access = 0;
427 num_modify = 0;
428 num_attrib = 0;
429 num_close_nowrite = 0;
430 num_close_write = 0;
431 num_open = 0;
432 num_move_self = 0;
433 num_moved_from = 0;
434 num_moved_to = 0;
435 num_create = 0;
436 num_delete = 0;
437 num_delete_self = 0;
438 num_unmount = 0;
439 num_total = 0;
440
441 collect_stats = 1;
442}
443
471int inotifytools_str_to_event_sep(char const * event, char sep) {
472 if ( strchr( "_" "abcdefghijklmnopqrstuvwxyz"
473 "ABCDEFGHIJKLMNOPQRSTUVWXYZ", sep ) ) {
474 return -1;
475 }
476
477 int ret, ret1, len;
478 char * event1, * event2;
479 char eventstr[4096];
480 ret = 0;
481
482 if ( !event || !event[0] ) return 0;
483
484 event1 = (char *)event;
485 event2 = strchr( event1, sep );
486 while ( event1 && event1[0] ) {
487 if ( event2 ) {
488 len = event2 - event1;
489 niceassert( len < 4096, "malformed event string (very long)" );
490 }
491 else {
492 len = strlen(event1);
493 }
494 if ( len > 4095 ) len = 4095;
495 strncpy( eventstr, event1, len );
496 eventstr[len] = 0;
497
498 ret1 = onestr_to_event( eventstr );
499 if ( 0 == ret1 || -1 == ret1 ) {
500 ret = ret1;
501 break;
502 }
503 ret |= ret1;
504
505 event1 = event2;
506 if ( event1 && event1[0] ) {
507 // jump over 'sep' character
508 ++event1;
509 // if last character was 'sep'...
510 if ( !event1[0] ) return 0;
511 event2 = strchr( event1, sep );
512 }
513 }
514
515 return ret;
516}
517
541int inotifytools_str_to_event(char const * event) {
542 return inotifytools_str_to_event_sep( event, ',' );
543}
544
556int onestr_to_event(char const * event)
557{
558 static int ret;
559 ret = -1;
560
561 if ( !event || !event[0] )
562 ret = 0;
563 else if ( 0 == strcasecmp(event, "ACCESS") )
564 ret = IN_ACCESS;
565 else if ( 0 == strcasecmp(event, "MODIFY") )
566 ret = IN_MODIFY;
567 else if ( 0 == strcasecmp(event, "ATTRIB") )
568 ret = IN_ATTRIB;
569 else if ( 0 == strcasecmp(event, "CLOSE_WRITE") )
570 ret = IN_CLOSE_WRITE;
571 else if ( 0 == strcasecmp(event, "CLOSE_NOWRITE") )
572 ret = IN_CLOSE_NOWRITE;
573 else if ( 0 == strcasecmp(event, "OPEN") )
574 ret = IN_OPEN;
575 else if ( 0 == strcasecmp(event, "MOVED_FROM") )
576 ret = IN_MOVED_FROM;
577 else if ( 0 == strcasecmp(event, "MOVED_TO") )
578 ret = IN_MOVED_TO;
579 else if ( 0 == strcasecmp(event, "CREATE") )
580 ret = IN_CREATE;
581 else if ( 0 == strcasecmp(event, "DELETE") )
582 ret = IN_DELETE;
583 else if ( 0 == strcasecmp(event, "DELETE_SELF") )
584 ret = IN_DELETE_SELF;
585 else if ( 0 == strcasecmp(event, "UNMOUNT") )
586 ret = IN_UNMOUNT;
587 else if ( 0 == strcasecmp(event, "Q_OVERFLOW") )
588 ret = IN_Q_OVERFLOW;
589 else if ( 0 == strcasecmp(event, "IGNORED") )
590 ret = IN_IGNORED;
591 else if ( 0 == strcasecmp(event, "CLOSE") )
592 ret = IN_CLOSE;
593 else if ( 0 == strcasecmp(event, "MOVE_SELF") )
594 ret = IN_MOVE_SELF;
595 else if ( 0 == strcasecmp(event, "MOVE") )
596 ret = IN_MOVE;
597 else if ( 0 == strcasecmp(event, "ISDIR") )
598 ret = IN_ISDIR;
599 else if ( 0 == strcasecmp(event, "ONESHOT") )
600 ret = IN_ONESHOT;
601 else if ( 0 == strcasecmp(event, "ALL_EVENTS") )
602 ret = IN_ALL_EVENTS;
603
604 return ret;
605}
606
628char * inotifytools_event_to_str(int events) {
629 return inotifytools_event_to_str_sep(events, ',');
630}
631
656char * inotifytools_event_to_str_sep(int events, char sep)
657{
658 static char ret[1024];
659 ret[0] = '\0';
660 ret[1] = '\0';
661
662 if ( IN_ACCESS & events ) {
663 strcat( ret, chrtostr(sep) );
664 strcat( ret, "ACCESS" );
665 }
666 if ( IN_MODIFY & events ) {
667 strcat( ret, chrtostr(sep) );
668 strcat( ret, "MODIFY" );
669 }
670 if ( IN_ATTRIB & events ) {
671 strcat( ret, chrtostr(sep) );
672 strcat( ret, "ATTRIB" );
673 }
674 if ( IN_CLOSE_WRITE & events ) {
675 strcat( ret, chrtostr(sep) );
676 strcat( ret, "CLOSE_WRITE" );
677 }
678 if ( IN_CLOSE_NOWRITE & events ) {
679 strcat( ret, chrtostr(sep) );
680 strcat( ret, "CLOSE_NOWRITE" );
681 }
682 if ( IN_OPEN & events ) {
683 strcat( ret, chrtostr(sep) );
684 strcat( ret, "OPEN" );
685 }
686 if ( IN_MOVED_FROM & events ) {
687 strcat( ret, chrtostr(sep) );
688 strcat( ret, "MOVED_FROM" );
689 }
690 if ( IN_MOVED_TO & events ) {
691 strcat( ret, chrtostr(sep) );
692 strcat( ret, "MOVED_TO" );
693 }
694 if ( IN_CREATE & events ) {
695 strcat( ret, chrtostr(sep) );
696 strcat( ret, "CREATE" );
697 }
698 if ( IN_DELETE & events ) {
699 strcat( ret, chrtostr(sep) );
700 strcat( ret, "DELETE" );
701 }
702 if ( IN_DELETE_SELF & events ) {
703 strcat( ret, chrtostr(sep) );
704 strcat( ret, "DELETE_SELF" );
705 }
706 if ( IN_UNMOUNT & events ) {
707 strcat( ret, chrtostr(sep) );
708 strcat( ret, "UNMOUNT" );
709 }
710 if ( IN_Q_OVERFLOW & events ) {
711 strcat( ret, chrtostr(sep) );
712 strcat( ret, "Q_OVERFLOW" );
713 }
714 if ( IN_IGNORED & events ) {
715 strcat( ret, chrtostr(sep) );
716 strcat( ret, "IGNORED" );
717 }
718 if ( IN_CLOSE & events ) {
719 strcat( ret, chrtostr(sep) );
720 strcat( ret, "CLOSE" );
721 }
722 if ( IN_MOVE_SELF & events ) {
723 strcat( ret, chrtostr(sep) );
724 strcat( ret, "MOVE_SELF" );
725 }
726 if ( IN_ISDIR & events ) {
727 strcat( ret, chrtostr(sep) );
728 strcat( ret, "ISDIR" );
729 }
730 if ( IN_ONESHOT & events ) {
731 strcat( ret, chrtostr(sep) );
732 strcat( ret, "ONESHOT" );
733 }
734
735 // Maybe we didn't match any... ?
736 if (ret[0] == '\0') {
737 niceassert( -1 != sprintf( ret, "%c0x%08x", sep, events ), 0 );
738 }
739
740 return &ret[1];
741}
742
764 niceassert( init, "inotifytools_initialize not called yet" );
765 watch *w = watch_from_wd(wd);
766 if (!w)
767 return NULL;
768
769 return w->filename;
770}
771
786int inotifytools_wd_from_filename( char const * filename ) {
787 niceassert( init, "inotifytools_initialize not called yet" );
788 watch *w = watch_from_filename(filename);
789 if (!w) return -1;
790 return w->wd;
791}
792
807void inotifytools_set_filename_by_wd( int wd, char const * filename ) {
808 niceassert( init, "inotifytools_initialize not called yet" );
809 watch *w = watch_from_wd(wd);
810 if (!w) return;
811 if (w->filename) free(w->filename);
812 w->filename = strdup(filename);
813}
814
829void inotifytools_set_filename_by_filename( char const * oldname,
830 char const * newname ) {
831 watch *w = watch_from_filename(oldname);
832 if (!w) return;
833 if (w->filename) free(w->filename);
834 w->filename = strdup(newname);
835}
836
859void inotifytools_replace_filename( char const * oldname,
860 char const * newname ) {
861 if ( !oldname || !newname ) return;
862 char *names[2+sizeof(int)/sizeof(char*)];
863 names[0] = (char*)oldname;
864 names[1] = (char*)newname;
865 *((int*)&names[2]) = strlen(oldname);
866 rbwalk(tree_filename, replace_filename, (void*)names);
867}
868
872int remove_inotify_watch(watch *w) {
873 error = 0;
874 int status = inotify_rm_watch( inotify_fd, w->wd );
875 if ( status < 0 ) {
876 fprintf(stderr, "Failed to remove watch on %s: %s\n", w->filename,
877 strerror(status) );
878 error = status;
879 return 0;
880 }
881 return 1;
882}
883
887watch *create_watch(int wd, char *filename) {
888 if ( wd <= 0 || !filename) return 0;
889
890 watch *w = (watch*)calloc(1, sizeof(watch));
891 w->wd = wd;
892 w->filename = strdup(filename);
893 rbsearch(w, tree_wd);
894 rbsearch(w, tree_filename);
895 return w;
896}
897
911 niceassert( init, "inotifytools_initialize not called yet" );
912 watch *w = watch_from_wd(wd);
913 if (!w) return 1;
914
915 if (!remove_inotify_watch(w)) return 0;
916 rbdelete(w, tree_wd);
917 rbdelete(w, tree_filename);
918 destroy_watch(w);
919 return 1;
920}
921
933int inotifytools_remove_watch_by_filename( char const * filename ) {
934 niceassert( init, "inotifytools_initialize not called yet" );
935 watch *w = watch_from_filename(filename);
936 if (!w) return 1;
937
938 if (!remove_inotify_watch(w)) return 0;
939 rbdelete(w, tree_wd);
940 rbdelete(w, tree_filename);
941 destroy_watch(w);
942 return 1;
943}
944
956int inotifytools_watch_file( char const * filename, int events ) {
957 static char const * filenames[2];
958 filenames[0] = filename;
959 filenames[1] = NULL;
960 return inotifytools_watch_files( filenames, events );
961}
962
978int inotifytools_watch_files( char const * filenames[], int events ) {
979 niceassert( init, "inotifytools_initialize not called yet" );
980 error = 0;
981
982 static int i;
983 for ( i = 0; filenames[i]; ++i ) {
984 static int wd;
985 wd = inotify_add_watch( inotify_fd, filenames[i], events );
986 if ( wd < 0 ) {
987 if ( wd == -1 ) {
988 error = errno;
989 return 0;
990 } // if ( wd == -1 )
991 else {
992 fprintf( stderr, "Failed to watch %s: returned wd was %d "
993 "(expected -1 or >0 )", filenames[i], wd );
994 // no appropriate value for error
995 return 0;
996 } // else
997 } // if ( wd < 0 )
998
999 char *filename;
1000 // Always end filename with / if it is a directory
1001 if ( !isdir(filenames[i])
1002 || filenames[i][strlen(filenames[i])-1] == '/') {
1003 filename = strdup(filenames[i]);
1004 }
1005 else {
1006 nasprintf( &filename, "%s/", filenames[i] );
1007 }
1008 create_watch(wd, filename);
1009 free(filename);
1010 } // for
1011
1012 return 1;
1013}
1014
1041struct inotify_event * inotifytools_next_event( int timeout ) {
1042 return inotifytools_next_events( timeout, 1 );
1043}
1044
1045
1095struct inotify_event * inotifytools_next_events( int timeout, int num_events ) {
1096 niceassert( init, "inotifytools_initialize not called yet" );
1097 niceassert( num_events <= MAX_EVENTS, "too many events requested" );
1098
1099 if ( num_events < 1 ) return NULL;
1100
1101 static struct inotify_event event[MAX_EVENTS];
1102 static struct inotify_event * ret;
1103 static int first_byte = 0;
1104 static ssize_t bytes;
1105 static jmp_buf jmp;
1106 static char match_name[MAX_STRLEN];
1107
1108#define RETURN(A) {\
1109 if (regex) {\
1110 inotifytools_snprintf(match_name, MAX_STRLEN, A, "%w%f");\
1111 if (0 == regexec(regex, match_name, 0, 0, 0)) {\
1112 longjmp(jmp,0);\
1113 }\
1114 }\
1115 if ( collect_stats ) {\
1116 record_stats( A );\
1117 }\
1118 return A;\
1119}
1120
1121 setjmp(jmp);
1122
1123 error = 0;
1124
1125 // first_byte is index into event buffer
1126 if ( first_byte != 0
1127 && first_byte <= (int)(bytes - sizeof(struct inotify_event)) ) {
1128
1129 ret = (struct inotify_event *)((char *)&event[0] + first_byte);
1130 first_byte += sizeof(struct inotify_event) + ret->len;
1131
1132 // if the pointer to the next event exactly hits end of bytes read,
1133 // that's good. next time we're called, we'll read.
1134 if ( first_byte == bytes ) {
1135 first_byte = 0;
1136 }
1137 else if ( first_byte > bytes ) {
1138 // oh... no. this can't be happening. An incomplete event.
1139 // Copy what we currently have into first element, call self to
1140 // read remainder.
1141 // oh, and they BETTER NOT overlap.
1142 // Boy I hope this code works.
1143 // But I think this can never happen due to how inotify is written.
1144 niceassert( (long)((char *)&event[0] +
1145 sizeof(struct inotify_event) +
1146 event[0].len) <= (long)ret,
1147 "extremely unlucky user, death imminent" );
1148 // how much of the event do we have?
1149 bytes = (char *)&event[0] + bytes - (char *)ret;
1150 memcpy( &event[0], ret, bytes );
1151 return inotifytools_next_events( timeout, num_events );
1152 }
1153 RETURN(ret);
1154
1155 }
1156
1157 else if ( first_byte == 0 ) {
1158 bytes = 0;
1159 }
1160
1161
1162 static ssize_t this_bytes;
1163 static unsigned int bytes_to_read;
1164 static int rc;
1165 static fd_set read_fds;
1166
1167 static struct timeval read_timeout;
1168 read_timeout.tv_sec = timeout;
1169 read_timeout.tv_usec = 0;
1170 static struct timeval * read_timeout_ptr;
1171 read_timeout_ptr = ( timeout <= 0 ? NULL : &read_timeout );
1172
1173 FD_ZERO(&read_fds);
1174 FD_SET(inotify_fd, &read_fds);
1175 rc = select(inotify_fd + 1, &read_fds,
1176 NULL, NULL, read_timeout_ptr);
1177 if ( rc < 0 ) {
1178 // error
1179 error = errno;
1180 return NULL;
1181 }
1182 else if ( rc == 0 ) {
1183 // timeout
1184 return NULL;
1185 }
1186
1187 // wait until we have enough bytes to read
1188 do {
1189 rc = ioctl( inotify_fd, FIONREAD, &bytes_to_read );
1190 } while ( !rc &&
1191 bytes_to_read < sizeof(struct inotify_event)*num_events );
1192
1193 if ( rc == -1 ) {
1194 error = errno;
1195 return NULL;
1196 }
1197
1198 this_bytes = read(inotify_fd, &event[0] + bytes,
1199 sizeof(struct inotify_event)*MAX_EVENTS - bytes);
1200 if ( this_bytes < 0 ) {
1201 error = errno;
1202 return NULL;
1203 }
1204 if ( this_bytes == 0 ) {
1205 fprintf(stderr, "Inotify reported end-of-file. Possibly too many "
1206 "events occurred at once.\n");
1207 return NULL;
1208 }
1209 bytes += this_bytes;
1210
1211 ret = &event[0];
1212 first_byte = sizeof(struct inotify_event) + ret->len;
1213 niceassert( first_byte <= bytes, "ridiculously long filename, things will "
1214 "almost certainly screw up." );
1215 if ( first_byte == bytes ) {
1216 first_byte = 0;
1217 }
1218
1219 RETURN(ret);
1220
1221#undef RETURN
1222}
1223
1249int inotifytools_watch_recursively( char const * path, int events ) {
1250 return inotifytools_watch_recursively_with_exclude( path, events, 0 );
1251}
1252
1285int inotifytools_watch_recursively_with_exclude( char const * path, int events,
1286 char const ** exclude_list ) {
1287 niceassert( init, "inotifytools_initialize not called yet" );
1288
1289 DIR * dir;
1290 char * my_path;
1291 error = 0;
1292 dir = opendir( path );
1293 if ( !dir ) {
1294 // If not a directory, don't need to do anything special
1295 if ( errno == ENOTDIR ) {
1296 return inotifytools_watch_file( path, events );
1297 }
1298 else {
1299 error = errno;
1300 return 0;
1301 }
1302 }
1303
1304 if ( path[strlen(path)-1] != '/' ) {
1305 nasprintf( &my_path, "%s/", path );
1306 }
1307 else {
1308 my_path = (char *)path;
1309 }
1310
1311 static struct dirent * ent;
1312 char * next_file;
1313 static struct stat64 my_stat;
1314 ent = readdir( dir );
1315 // Watch each directory within this directory
1316 while ( ent ) {
1317 if ( (0 != strcmp( ent->d_name, "." )) &&
1318 (0 != strcmp( ent->d_name, ".." )) ) {
1319 nasprintf(&next_file,"%s%s", my_path, ent->d_name);
1320 if ( -1 == lstat64( next_file, &my_stat ) ) {
1321 error = errno;
1322 free( next_file );
1323 if ( errno != EACCES ) {
1324 error = errno;
1325 if ( my_path != path ) free( my_path );
1326 closedir( dir );
1327 return 0;
1328 }
1329 }
1330 else if ( S_ISDIR( my_stat.st_mode ) &&
1331 !S_ISLNK( my_stat.st_mode )) {
1332 free( next_file );
1333 nasprintf(&next_file,"%s%s/", my_path, ent->d_name);
1334 static unsigned int no_watch;
1335 static char const ** exclude_entry;
1336
1337 no_watch = 0;
1338 for (exclude_entry = exclude_list;
1339 exclude_entry && *exclude_entry && !no_watch;
1340 ++exclude_entry) {
1341 static int exclude_length;
1342
1343 exclude_length = strlen(*exclude_entry);
1344 if ((*exclude_entry)[exclude_length-1] == '/') {
1345 --exclude_length;
1346 }
1347 if ( strlen(next_file) == (unsigned)(exclude_length + 1) &&
1348 !strncmp(*exclude_entry, next_file, exclude_length)) {
1349 // directory found in exclude list
1350 no_watch = 1;
1351 }
1352 }
1353 if (!no_watch) {
1354 static int status;
1356 next_file,
1357 events,
1358 exclude_list );
1359 // For some errors, we will continue.
1360 if ( !status && (EACCES != error) && (ENOENT != error) &&
1361 (ELOOP != error) ) {
1362 free( next_file );
1363 if ( my_path != path ) free( my_path );
1364 closedir( dir );
1365 return 0;
1366 }
1367 } // if !no_watch
1368 free( next_file );
1369 } // if isdir and not islnk
1370 else {
1371 free( next_file );
1372 }
1373 }
1374 ent = readdir( dir );
1375 error = 0;
1376 }
1377
1378 closedir( dir );
1379
1380 int ret = inotifytools_watch_file( my_path, events );
1381 if ( my_path != path ) free( my_path );
1382 return ret;
1383}
1384
1388void record_stats( struct inotify_event const * event ) {
1389 if (!event) return;
1390 watch *w = watch_from_wd(event->wd);
1391 if (!w) return;
1392 if ( IN_ACCESS & event->mask ) {
1393 ++w->hit_access;
1394 ++num_access;
1395 }
1396 if ( IN_MODIFY & event->mask ) {
1397 ++w->hit_modify;
1398 ++num_modify;
1399 }
1400 if ( IN_ATTRIB & event->mask ) {
1401 ++w->hit_attrib;
1402 ++num_attrib;
1403 }
1404 if ( IN_CLOSE_WRITE & event->mask ) {
1405 ++w->hit_close_write;
1406 ++num_close_write;
1407 }
1408 if ( IN_CLOSE_NOWRITE & event->mask ) {
1409 ++w->hit_close_nowrite;
1410 ++num_close_nowrite;
1411 }
1412 if ( IN_OPEN & event->mask ) {
1413 ++w->hit_open;
1414 ++num_open;
1415 }
1416 if ( IN_MOVED_FROM & event->mask ) {
1417 ++w->hit_moved_from;
1418 ++num_moved_from;
1419 }
1420 if ( IN_MOVED_TO & event->mask ) {
1421 ++w->hit_moved_to;
1422 ++num_moved_to;
1423 }
1424 if ( IN_CREATE & event->mask ) {
1425 ++w->hit_create;
1426 ++num_create;
1427 }
1428 if ( IN_DELETE & event->mask ) {
1429 ++w->hit_delete;
1430 ++num_delete;
1431 }
1432 if ( IN_DELETE_SELF & event->mask ) {
1433 ++w->hit_delete_self;
1434 ++num_delete_self;
1435 }
1436 if ( IN_UNMOUNT & event->mask ) {
1437 ++w->hit_unmount;
1438 ++num_unmount;
1439 }
1440 if ( IN_MOVE_SELF & event->mask ) {
1441 ++w->hit_move_self;
1442 ++num_move_self;
1443 }
1444
1445 ++w->hit_total;
1446 ++num_total;
1447
1448}
1449
1450int *stat_ptr(watch *w, int event)
1451{
1452 if ( IN_ACCESS == event )
1453 return &w->hit_access;
1454 if ( IN_MODIFY == event )
1455 return &w->hit_modify;
1456 if ( IN_ATTRIB == event )
1457 return &w->hit_attrib;
1458 if ( IN_CLOSE_WRITE == event )
1459 return &w->hit_close_write;
1460 if ( IN_CLOSE_NOWRITE == event )
1461 return &w->hit_close_nowrite;
1462 if ( IN_OPEN == event )
1463 return &w->hit_open;
1464 if ( IN_MOVED_FROM == event )
1465 return &w->hit_moved_from;
1466 if ( IN_MOVED_TO == event )
1467 return &w->hit_moved_to;
1468 if ( IN_CREATE == event )
1469 return &w->hit_create;
1470 if ( IN_DELETE == event )
1471 return &w->hit_delete;
1472 if ( IN_DELETE_SELF == event )
1473 return &w->hit_delete_self;
1474 if ( IN_UNMOUNT == event )
1475 return &w->hit_unmount;
1476 if ( IN_MOVE_SELF == event )
1477 return &w->hit_move_self;
1478 if ( 0 == event )
1479 return &w->hit_total;
1480 return 0;
1481}
1482
1498int inotifytools_get_stat_by_wd( int wd, int event ) {
1499 if (!collect_stats) return -1;
1500
1501 watch *w = watch_from_wd(wd);
1502 if (!w) return -1;
1503 int *i = stat_ptr(w, event);
1504 if (!i) return -1;
1505 return *i;
1506}
1507
1522 if (!collect_stats) return -1;
1523 if ( IN_ACCESS == event )
1524 return num_access;
1525 if ( IN_MODIFY == event )
1526 return num_modify;
1527 if ( IN_ATTRIB == event )
1528 return num_attrib;
1529 if ( IN_CLOSE_WRITE == event )
1530 return num_close_write;
1531 if ( IN_CLOSE_NOWRITE == event )
1532 return num_close_nowrite;
1533 if ( IN_OPEN == event )
1534 return num_open;
1535 if ( IN_MOVED_FROM == event )
1536 return num_moved_from;
1537 if ( IN_MOVED_TO == event )
1538 return num_moved_to;
1539 if ( IN_CREATE == event )
1540 return num_create;
1541 if ( IN_DELETE == event )
1542 return num_delete;
1543 if ( IN_DELETE_SELF == event )
1544 return num_delete_self;
1545 if ( IN_UNMOUNT == event )
1546 return num_unmount;
1547 if ( IN_MOVE_SELF == event )
1548 return num_move_self;
1549
1550 if ( 0 == event )
1551 return num_total;
1552
1553 return -1;
1554}
1555
1575int inotifytools_get_stat_by_filename( char const * filename,
1576 int event ) {
1578 filename ), event );
1579}
1580
1592 return error;
1593}
1594
1598int isdir( char const * path ) {
1599 static struct stat64 my_stat;
1600
1601 if ( -1 == lstat64( path, &my_stat ) ) {
1602 if (errno == ENOENT) return 0;
1603 fprintf(stderr, "Stat failed on %s: %s\n", path, strerror(errno));
1604 return 0;
1605 }
1606
1607 return S_ISDIR( my_stat.st_mode ) && !S_ISLNK( my_stat.st_mode );
1608}
1609
1610
1618 int ret = 0;
1619 rbwalk(tree_filename, get_num, (void*)&ret);
1620 return ret;
1621}
1622
1663int inotifytools_printf( struct inotify_event* event, char* fmt ) {
1664 return inotifytools_fprintf( stdout, event, fmt );
1665}
1666
1708int inotifytools_fprintf( FILE* file, struct inotify_event* event, char* fmt ) {
1709 static char out[MAX_STRLEN+1];
1710 static int ret;
1711 ret = inotifytools_sprintf( out, event, fmt );
1712 if ( -1 != ret ) fprintf( file, "%s", out );
1713 return ret;
1714}
1715
1766int inotifytools_sprintf( char * out, struct inotify_event* event, char* fmt ) {
1767 return inotifytools_snprintf( out, MAX_STRLEN, event, fmt );
1768}
1769
1770
1817int inotifytools_snprintf( char * out, int size,
1818 struct inotify_event* event, char* fmt ) {
1819 static char * filename, * eventname, * eventstr;
1820 static unsigned int i, ind;
1821 static char ch1;
1822 static char timestr[MAX_STRLEN];
1823 static time_t now;
1824
1825
1826 if ( event->len > 0 ) {
1827 eventname = event->name;
1828 }
1829 else {
1830 eventname = NULL;
1831 }
1832
1833
1834 filename = inotifytools_filename_from_wd( event->wd );
1835
1836 if ( !fmt || 0 == strlen(fmt) ) {
1837 error = EINVAL;
1838 return -1;
1839 }
1840 if ( strlen(fmt) > MAX_STRLEN || size > MAX_STRLEN) {
1841 error = EMSGSIZE;
1842 return -1;
1843 }
1844
1845 ind = 0;
1846 for ( i = 0; i < strlen(fmt) &&
1847 (int)ind < size - 1; ++i ) {
1848 if ( fmt[i] != '%' ) {
1849 out[ind++] = fmt[i];
1850 continue;
1851 }
1852
1853 if ( i == strlen(fmt) - 1 ) {
1854 // last character is %, invalid
1855 error = EINVAL;
1856 return ind;
1857 }
1858
1859 ch1 = fmt[i+1];
1860
1861 if ( ch1 == '%' ) {
1862 out[ind++] = '%';
1863 ++i;
1864 continue;
1865 }
1866
1867 if ( ch1 == 'w' ) {
1868 if ( filename ) {
1869 strncpy( &out[ind], filename, size - ind );
1870 ind += strlen(filename);
1871 }
1872 ++i;
1873 continue;
1874 }
1875
1876 if ( ch1 == 'f' ) {
1877 if ( eventname ) {
1878 strncpy( &out[ind], eventname, size - ind );
1879 ind += strlen(eventname);
1880 }
1881 ++i;
1882 continue;
1883 }
1884
1885 if ( ch1 == 'e' ) {
1886 eventstr = inotifytools_event_to_str( event->mask );
1887 strncpy( &out[ind], eventstr, size - ind );
1888 ind += strlen(eventstr);
1889 ++i;
1890 continue;
1891 }
1892
1893 if ( ch1 == 'T' ) {
1894
1895 if ( timefmt ) {
1896
1897 now = time(0);
1898 if ( 0 >= strftime( timestr, MAX_STRLEN-1, timefmt,
1899 localtime( &now ) ) ) {
1900
1901 // time format probably invalid
1902 error = EINVAL;
1903 return ind;
1904 }
1905 }
1906 else {
1907 timestr[0] = 0;
1908 }
1909
1910 strncpy( &out[ind], timestr, size - ind );
1911 ind += strlen(timestr);
1912 ++i;
1913 continue;
1914 }
1915
1916 // Check if next char in fmt is e
1917 if ( i < strlen(fmt) - 2 && fmt[i+2] == 'e' ) {
1918 eventstr = inotifytools_event_to_str_sep( event->mask, ch1 );
1919 strncpy( &out[ind], eventstr, size - ind );
1920 ind += strlen(eventstr);
1921 i += 2;
1922 continue;
1923 }
1924
1925 // OK, this wasn't a special format character, just output it as normal
1926 if ( ind < MAX_STRLEN ) out[ind++] = '%';
1927 if ( ind < MAX_STRLEN ) out[ind++] = ch1;
1928 ++i;
1929 }
1930 out[ind] = 0;
1931
1932 return ind - 1;
1933}
1934
1945 timefmt = fmt;
1946}
1947
1957 int ret;
1958 if ( !read_num_from_file( QUEUE_SIZE_PATH, &ret ) ) return -1;
1959 return ret;
1960}
1961
1972 int ret;
1973 if ( !read_num_from_file( INSTANCES_PATH, &ret ) ) return -1;
1974 return ret;
1975}
1976
1987 int ret;
1988 if ( !read_num_from_file( WATCHES_SIZE_PATH, &ret ) ) return -1;
1989 return ret;
1990}
1991
2003int inotifytools_ignore_events_by_regex( char const *pattern, int flags ) {
2004 if (!pattern) {
2005 if (regex) {
2006 regfree(regex);
2007 free(regex);
2008 regex = 0;
2009 }
2010 return 1;
2011 }
2012
2013 if (regex) { regfree(regex); }
2014 else { regex = (regex_t *)malloc(sizeof(regex_t)); }
2015
2016 int ret = regcomp(regex, pattern, flags | REG_NOSUB);
2017 if (0 == ret) return 1;
2018
2019 regfree(regex);
2020 free(regex);
2021 regex = 0;
2022 error = EINVAL;
2023 return 0;
2024}
2025
2026int event_compare(const void *p1, const void *p2, const void *config)
2027{
2028 if (!p1 || !p2) return p1 - p2;
2029 char asc = 1;
2030 int sort_event = (int)config;
2031 if (sort_event == -1) {
2032 sort_event = 0;
2033 asc = 0;
2034 } else if (sort_event < 0) {
2035 sort_event = -sort_event;
2036 asc = 0;
2037 }
2038 int *i1 = stat_ptr((watch*)p1, sort_event);
2039 int *i2 = stat_ptr((watch*)p2, sort_event);
2040 if (0 == *i1 - *i2) {
2041 return ((watch*)p1)->wd - ((watch*)p2)->wd;
2042 }
2043 if (asc)
2044 return *i1 - *i2;
2045 else
2046 return *i2 - *i1;
2047}
2048
2049struct rbtree *inotifytools_wd_sorted_by_event(int sort_event)
2050{
2051 struct rbtree *ret = rbinit(event_compare, (void*)sort_event);
2052 RBLIST *all = rbopenlist(tree_wd);
2053 void const *p = rbreadlist(all);
2054 while (p) {
2055 void const *r = rbsearch(p, ret);
2056 niceassert((int)(r == p), "Couldn't insert watch into new tree");
2057 p = rbreadlist(all);
2058 }
2059 rbcloselist(all);
2060 return ret;
2061}
inotifytools library public interface.
int inotifytools_ignore_events_by_regex(char const *pattern, int flags)
int inotifytools_get_max_queued_events()
int inotifytools_watch_recursively_with_exclude(char const *path, int events, char const **exclude_list)
int inotifytools_remove_watch_by_filename(char const *filename)
int inotifytools_error()
struct inotify_event * inotifytools_next_events(int timeout, int num_events)
int inotifytools_initialize()
char * inotifytools_filename_from_wd(int wd)
int inotifytools_get_stat_by_wd(int wd, int event)
int inotifytools_watch_recursively(char const *path, int events)
int inotifytools_wd_from_filename(char const *filename)
struct inotify_event * inotifytools_next_event(int timeout)
int inotifytools_fprintf(FILE *file, struct inotify_event *event, char *fmt)
int inotifytools_get_stat_by_filename(char const *filename, int event)
void inotifytools_set_filename_by_filename(char const *oldname, char const *newname)
int inotifytools_remove_watch_by_wd(int wd)
char * inotifytools_event_to_str_sep(int events, char sep)
int inotifytools_str_to_event_sep(char const *event, char sep)
void inotifytools_cleanup()
int inotifytools_watch_files(char const *filenames[], int events)
int inotifytools_snprintf(char *out, int size, struct inotify_event *event, char *fmt)
int inotifytools_get_max_user_instances()
int inotifytools_sprintf(char *out, struct inotify_event *event, char *fmt)
int inotifytools_get_num_watches()
char * inotifytools_event_to_str(int events)
int inotifytools_printf(struct inotify_event *event, char *fmt)
int inotifytools_str_to_event(char const *event)
void inotifytools_replace_filename(char const *oldname, char const *newname)
void inotifytools_initialize_stats()
int inotifytools_get_max_user_watches()
int inotifytools_get_stat_total(int event)
void inotifytools_set_printf_timefmt(char *fmt)
void inotifytools_set_filename_by_wd(int wd, char const *filename)
int inotifytools_watch_file(char const *filename, int events)