00001
00002
00015 #include "../../config.h"
00016 #include "inotifytools/inotifytools.h"
00017 #include "inotifytools_p.h"
00018
00019 #include <string.h>
00020 #include <strings.h>
00021 #include <stdlib.h>
00022 #include <stdio.h>
00023 #include <errno.h>
00024 #include <sys/select.h>
00025 #include <sys/types.h>
00026 #include <sys/stat.h>
00027 #include <sys/ioctl.h>
00028 #include <unistd.h>
00029 #include <dirent.h>
00030 #include <time.h>
00031 #include <regex.h>
00032 #include <setjmp.h>
00033
00034 #include "inotifytools/inotify.h"
00035
00126 #define MAX_EVENTS 4096
00127 #define MAX_STRLEN 4096
00128 #define INOTIFY_PROCDIR "/proc/sys/fs/inotify/"
00129 #define WATCHES_SIZE_PATH INOTIFY_PROCDIR "max_user_watches"
00130 #define QUEUE_SIZE_PATH INOTIFY_PROCDIR "max_queued_watches"
00131 #define INSTANCES_PATH INOTIFY_PROCDIR "max_user_instances"
00132
00133 static int inotify_fd;
00134 static unsigned num_access;
00135 static unsigned num_modify;
00136 static unsigned num_attrib;
00137 static unsigned num_close_nowrite;
00138 static unsigned num_close_write;
00139 static unsigned num_open;
00140 static unsigned num_move_self;
00141 static unsigned num_moved_to;
00142 static unsigned num_moved_from;
00143 static unsigned num_create;
00144 static unsigned num_delete;
00145 static unsigned num_delete_self;
00146 static unsigned num_unmount;
00147 static unsigned num_total;
00148 static int collect_stats = 0;
00149
00150 struct rbtree *tree_wd = 0;
00151 struct rbtree *tree_filename = 0;
00152 static int error = 0;
00153 static int init = 0;
00154 static char* timefmt = 0;
00155 static regex_t* regex = 0;
00156
00157 int isdir( char const * path );
00158 void record_stats( struct inotify_event const * event );
00159 int onestr_to_event(char const * event);
00160
00178 #define niceassert(cond,mesg) _niceassert((long)cond, __LINE__, __FILE__, \
00179 #cond, mesg)
00180
00181 #define nasprintf(...) niceassert( -1 != asprintf(__VA_ARGS__), "out of memory")
00182
00200 void _niceassert( long cond, int line, char const * file, char const * condstr,
00201 char const * mesg ) {
00202 if ( cond ) return;
00203
00204 if ( mesg ) {
00205 fprintf(stderr, "%s:%d assertion ( %s ) failed: %s\n", file, line,
00206 condstr, mesg );
00207 }
00208 else {
00209 fprintf(stderr, "%s:%d assertion ( %s ) failed.\n", file, line, condstr);
00210 }
00211 }
00212
00222 char * chrtostr(char ch) {
00223 static char str[2] = { '\0', '\0' };
00224 str[0] = ch;
00225 return str;
00226 }
00227
00231 int read_num_from_file( char * filename, int * num ) {
00232 FILE * file = fopen( filename, "r" );
00233 if ( !file ) {
00234 error = errno;
00235 return 0;
00236 }
00237
00238 if ( EOF == fscanf( file, "%d", num ) ) {
00239 error = errno;
00240 return 0;
00241 }
00242
00243 niceassert( 0 == fclose( file ), 0 );
00244
00245 return 1;
00246 }
00247
00248 int wd_compare(const void *d1, const void *d2, const void *config) {
00249 if (!d1 || !d2) return d1 - d2;
00250 return ((watch*)d1)->wd - ((watch*)d2)->wd;
00251 }
00252
00253 int filename_compare(const void *d1, const void *d2, const void *config) {
00254 if (!d1 || !d2) return d1 - d2;
00255 return strcmp(((watch*)d1)->filename, ((watch*)d2)->filename);
00256 }
00257
00261 watch *watch_from_wd( int wd ) {
00262 watch w;
00263 w.wd = wd;
00264 return (watch*)rbfind(&w, tree_wd);
00265 }
00266
00270 watch *watch_from_filename( char const *filename ) {
00271 watch w;
00272 w.filename = (char*)filename;
00273 return (watch*)rbfind(&w, tree_filename);
00274 }
00275
00285 int inotifytools_initialize() {
00286 if (init) return 1;
00287
00288 error = 0;
00289
00290 inotify_fd = inotify_init();
00291 if (inotify_fd < 0) {
00292 error = inotify_fd;
00293 return 0;
00294 }
00295
00296 collect_stats = 0;
00297 init = 1;
00298 tree_wd = rbinit(wd_compare, 0);
00299 tree_filename = rbinit(filename_compare, 0);
00300 timefmt = 0;
00301
00302 return 1;
00303 }
00304
00308 void destroy_watch(watch *w) {
00309 if (w->filename) free(w->filename);
00310 free(w);
00311 }
00312
00316 void cleanup_tree(const void *nodep,
00317 const VISIT which,
00318 const int depth, void* arg) {
00319 if (which != endorder && which != leaf) return;
00320 watch *w = (watch*)nodep;
00321 destroy_watch(w);
00322 }
00323
00330 void inotifytools_cleanup() {
00331 if (!init) return;
00332
00333 init = 0;
00334 close(inotify_fd);
00335 collect_stats = 0;
00336 error = 0;
00337 timefmt = 0;
00338
00339 if (regex) {
00340 regfree(regex);
00341 free(regex);
00342 regex = 0;
00343 }
00344
00345 rbwalk(tree_wd, cleanup_tree, 0);
00346 rbdestroy(tree_wd); tree_wd = 0;
00347 rbdestroy(tree_filename); tree_filename = 0;
00348 }
00349
00353 void empty_stats(const void *nodep,
00354 const VISIT which,
00355 const int depth, void *arg) {
00356 if (which != endorder && which != leaf) return;
00357 watch *w = (watch*)nodep;
00358 w->hit_access = 0;
00359 w->hit_modify = 0;
00360 w->hit_attrib = 0;
00361 w->hit_close_nowrite = 0;
00362 w->hit_close_write = 0;
00363 w->hit_open = 0;
00364 w->hit_move_self = 0;
00365 w->hit_moved_from = 0;
00366 w->hit_moved_to = 0;
00367 w->hit_create = 0;
00368 w->hit_delete = 0;
00369 w->hit_delete_self = 0;
00370 w->hit_unmount = 0;
00371 w->hit_total = 0;
00372 }
00373
00377 void replace_filename(const void *nodep,
00378 const VISIT which,
00379 const int depth, void *arg) {
00380 if (which != endorder && which != leaf) return;
00381 watch *w = (watch*)nodep;
00382 char *old_name = ((char**)arg)[0];
00383 char *new_name = ((char**)arg)[1];
00384 int old_len = *((int*)&((char**)arg)[2]);
00385 char *name;
00386 if ( 0 == strncmp( old_name, w->filename, old_len ) ) {
00387 nasprintf( &name, "%s%s", new_name, &(w->filename[old_len]) );
00388 if (!strcmp( w->filename, new_name )) {
00389 free(name);
00390 } else {
00391 rbdelete(w, tree_filename);
00392 free( w->filename );
00393 w->filename = name;
00394 rbsearch(w, tree_filename);
00395 }
00396 }
00397 }
00398
00402 void get_num(const void *nodep,
00403 const VISIT which,
00404 const int depth, void *arg) {
00405 if (which != endorder && which != leaf) return;
00406 ++(*((int*)arg));
00407 }
00408
00409
00422 void inotifytools_initialize_stats() {
00423 niceassert( init, "inotifytools_initialize not called yet" );
00424
00425
00426 if (collect_stats) {
00427 rbwalk(tree_wd, empty_stats, 0);
00428 }
00429
00430 num_access = 0;
00431 num_modify = 0;
00432 num_attrib = 0;
00433 num_close_nowrite = 0;
00434 num_close_write = 0;
00435 num_open = 0;
00436 num_move_self = 0;
00437 num_moved_from = 0;
00438 num_moved_to = 0;
00439 num_create = 0;
00440 num_delete = 0;
00441 num_delete_self = 0;
00442 num_unmount = 0;
00443 num_total = 0;
00444
00445 collect_stats = 1;
00446 }
00447
00475 int inotifytools_str_to_event_sep(char const * event, char sep) {
00476 if ( strchr( "_" "abcdefghijklmnopqrstuvwxyz"
00477 "ABCDEFGHIJKLMNOPQRSTUVWXYZ", sep ) ) {
00478 return -1;
00479 }
00480
00481 int ret, ret1, len;
00482 char * event1, * event2;
00483 char eventstr[4096];
00484 ret = 0;
00485
00486 if ( !event || !event[0] ) return 0;
00487
00488 event1 = (char *)event;
00489 event2 = strchr( event1, sep );
00490 while ( event1 && event1[0] ) {
00491 if ( event2 ) {
00492 len = event2 - event1;
00493 niceassert( len < 4096, "malformed event string (very long)" );
00494 }
00495 else {
00496 len = strlen(event1);
00497 }
00498 if ( len > 4095 ) len = 4095;
00499 strncpy( eventstr, event1, len );
00500 eventstr[len] = 0;
00501
00502 ret1 = onestr_to_event( eventstr );
00503 if ( 0 == ret1 || -1 == ret1 ) {
00504 ret = ret1;
00505 break;
00506 }
00507 ret |= ret1;
00508
00509 event1 = event2;
00510 if ( event1 && event1[0] ) {
00511
00512 ++event1;
00513
00514 if ( !event1[0] ) return 0;
00515 event2 = strchr( event1, sep );
00516 }
00517 }
00518
00519 return ret;
00520 }
00521
00545 int inotifytools_str_to_event(char const * event) {
00546 return inotifytools_str_to_event_sep( event, ',' );
00547 }
00548
00560 int onestr_to_event(char const * event)
00561 {
00562 static int ret;
00563 ret = -1;
00564
00565 if ( !event || !event[0] )
00566 ret = 0;
00567 else if ( 0 == strcasecmp(event, "ACCESS") )
00568 ret = IN_ACCESS;
00569 else if ( 0 == strcasecmp(event, "MODIFY") )
00570 ret = IN_MODIFY;
00571 else if ( 0 == strcasecmp(event, "ATTRIB") )
00572 ret = IN_ATTRIB;
00573 else if ( 0 == strcasecmp(event, "CLOSE_WRITE") )
00574 ret = IN_CLOSE_WRITE;
00575 else if ( 0 == strcasecmp(event, "CLOSE_NOWRITE") )
00576 ret = IN_CLOSE_NOWRITE;
00577 else if ( 0 == strcasecmp(event, "OPEN") )
00578 ret = IN_OPEN;
00579 else if ( 0 == strcasecmp(event, "MOVED_FROM") )
00580 ret = IN_MOVED_FROM;
00581 else if ( 0 == strcasecmp(event, "MOVED_TO") )
00582 ret = IN_MOVED_TO;
00583 else if ( 0 == strcasecmp(event, "CREATE") )
00584 ret = IN_CREATE;
00585 else if ( 0 == strcasecmp(event, "DELETE") )
00586 ret = IN_DELETE;
00587 else if ( 0 == strcasecmp(event, "DELETE_SELF") )
00588 ret = IN_DELETE_SELF;
00589 else if ( 0 == strcasecmp(event, "UNMOUNT") )
00590 ret = IN_UNMOUNT;
00591 else if ( 0 == strcasecmp(event, "Q_OVERFLOW") )
00592 ret = IN_Q_OVERFLOW;
00593 else if ( 0 == strcasecmp(event, "IGNORED") )
00594 ret = IN_IGNORED;
00595 else if ( 0 == strcasecmp(event, "CLOSE") )
00596 ret = IN_CLOSE;
00597 else if ( 0 == strcasecmp(event, "MOVE_SELF") )
00598 ret = IN_MOVE_SELF;
00599 else if ( 0 == strcasecmp(event, "MOVE") )
00600 ret = IN_MOVE;
00601 else if ( 0 == strcasecmp(event, "ISDIR") )
00602 ret = IN_ISDIR;
00603 else if ( 0 == strcasecmp(event, "ONESHOT") )
00604 ret = IN_ONESHOT;
00605 else if ( 0 == strcasecmp(event, "ALL_EVENTS") )
00606 ret = IN_ALL_EVENTS;
00607
00608 return ret;
00609 }
00610
00632 char * inotifytools_event_to_str(int events) {
00633 return inotifytools_event_to_str_sep(events, ',');
00634 }
00635
00660 char * inotifytools_event_to_str_sep(int events, char sep)
00661 {
00662 static char ret[1024];
00663 ret[0] = '\0';
00664 ret[1] = '\0';
00665
00666 if ( IN_ACCESS & events ) {
00667 strcat( ret, chrtostr(sep) );
00668 strcat( ret, "ACCESS" );
00669 }
00670 if ( IN_MODIFY & events ) {
00671 strcat( ret, chrtostr(sep) );
00672 strcat( ret, "MODIFY" );
00673 }
00674 if ( IN_ATTRIB & events ) {
00675 strcat( ret, chrtostr(sep) );
00676 strcat( ret, "ATTRIB" );
00677 }
00678 if ( IN_CLOSE_WRITE & events ) {
00679 strcat( ret, chrtostr(sep) );
00680 strcat( ret, "CLOSE_WRITE" );
00681 }
00682 if ( IN_CLOSE_NOWRITE & events ) {
00683 strcat( ret, chrtostr(sep) );
00684 strcat( ret, "CLOSE_NOWRITE" );
00685 }
00686 if ( IN_OPEN & events ) {
00687 strcat( ret, chrtostr(sep) );
00688 strcat( ret, "OPEN" );
00689 }
00690 if ( IN_MOVED_FROM & events ) {
00691 strcat( ret, chrtostr(sep) );
00692 strcat( ret, "MOVED_FROM" );
00693 }
00694 if ( IN_MOVED_TO & events ) {
00695 strcat( ret, chrtostr(sep) );
00696 strcat( ret, "MOVED_TO" );
00697 }
00698 if ( IN_CREATE & events ) {
00699 strcat( ret, chrtostr(sep) );
00700 strcat( ret, "CREATE" );
00701 }
00702 if ( IN_DELETE & events ) {
00703 strcat( ret, chrtostr(sep) );
00704 strcat( ret, "DELETE" );
00705 }
00706 if ( IN_DELETE_SELF & events ) {
00707 strcat( ret, chrtostr(sep) );
00708 strcat( ret, "DELETE_SELF" );
00709 }
00710 if ( IN_UNMOUNT & events ) {
00711 strcat( ret, chrtostr(sep) );
00712 strcat( ret, "UNMOUNT" );
00713 }
00714 if ( IN_Q_OVERFLOW & events ) {
00715 strcat( ret, chrtostr(sep) );
00716 strcat( ret, "Q_OVERFLOW" );
00717 }
00718 if ( IN_IGNORED & events ) {
00719 strcat( ret, chrtostr(sep) );
00720 strcat( ret, "IGNORED" );
00721 }
00722 if ( IN_CLOSE & events ) {
00723 strcat( ret, chrtostr(sep) );
00724 strcat( ret, "CLOSE" );
00725 }
00726 if ( IN_MOVE_SELF & events ) {
00727 strcat( ret, chrtostr(sep) );
00728 strcat( ret, "MOVE_SELF" );
00729 }
00730 if ( IN_ISDIR & events ) {
00731 strcat( ret, chrtostr(sep) );
00732 strcat( ret, "ISDIR" );
00733 }
00734 if ( IN_ONESHOT & events ) {
00735 strcat( ret, chrtostr(sep) );
00736 strcat( ret, "ONESHOT" );
00737 }
00738
00739
00740 if (ret[0] == '\0') {
00741 niceassert( -1 != sprintf( ret, "%c0x%08x", sep, events ), 0 );
00742 }
00743
00744 return &ret[1];
00745 }
00746
00767 char * inotifytools_filename_from_wd( int wd ) {
00768 niceassert( init, "inotifytools_initialize not called yet" );
00769 watch *w = watch_from_wd(wd);
00770 if (!w) return 0;
00771 return w->filename;
00772 }
00773
00788 int inotifytools_wd_from_filename( char const * filename ) {
00789 niceassert( init, "inotifytools_initialize not called yet" );
00790 watch *w = watch_from_filename(filename);
00791 if (!w) return -1;
00792 return w->wd;
00793 }
00794
00809 void inotifytools_set_filename_by_wd( int wd, char const * filename ) {
00810 niceassert( init, "inotifytools_initialize not called yet" );
00811 watch *w = watch_from_wd(wd);
00812 if (!w) return;
00813 if (w->filename) free(w->filename);
00814 w->filename = strdup(filename);
00815 }
00816
00831 void inotifytools_set_filename_by_filename( char const * oldname,
00832 char const * newname ) {
00833 watch *w = watch_from_filename(oldname);
00834 if (!w) return;
00835 if (w->filename) free(w->filename);
00836 w->filename = strdup(newname);
00837 }
00838
00861 void inotifytools_replace_filename( char const * oldname,
00862 char const * newname ) {
00863 if ( !oldname || !newname ) return;
00864 char *names[2+sizeof(int)/sizeof(char*)];
00865 names[0] = (char*)oldname;
00866 names[1] = (char*)newname;
00867 *((int*)&names[2]) = strlen(oldname);
00868 rbwalk(tree_filename, replace_filename, (void*)names);
00869 }
00870
00874 int remove_inotify_watch(watch *w) {
00875 error = 0;
00876 int status = inotify_rm_watch( inotify_fd, w->wd );
00877 if ( status < 0 ) {
00878 fprintf(stderr, "Failed to remove watch on %s: %s\n", w->filename,
00879 strerror(status) );
00880 error = status;
00881 return 0;
00882 }
00883 return 1;
00884 }
00885
00889 watch *create_watch(int wd, char *filename) {
00890 if ( wd <= 0 || !filename) return 0;
00891
00892 watch *w = (watch*)calloc(1, sizeof(watch));
00893 w->wd = wd;
00894 w->filename = strdup(filename);
00895 rbsearch(w, tree_wd);
00896 rbsearch(w, tree_filename);
00897 }
00898
00911 int inotifytools_remove_watch_by_wd( int wd ) {
00912 niceassert( init, "inotifytools_initialize not called yet" );
00913 watch *w = watch_from_wd(wd);
00914 if (!w) return 1;
00915
00916 if (!remove_inotify_watch(w)) return 0;
00917 rbdelete(w, tree_wd);
00918 rbdelete(w, tree_filename);
00919 destroy_watch(w);
00920 return 1;
00921 }
00922
00934 int inotifytools_remove_watch_by_filename( char const * filename ) {
00935 niceassert( init, "inotifytools_initialize not called yet" );
00936 watch *w = watch_from_filename(filename);
00937 if (!w) return 1;
00938
00939 if (!remove_inotify_watch(w)) return 0;
00940 rbdelete(w, tree_wd);
00941 rbdelete(w, tree_filename);
00942 destroy_watch(w);
00943 return 1;
00944 }
00945
00957 int inotifytools_watch_file( char const * filename, int events ) {
00958 static char const * filenames[2];
00959 filenames[0] = filename;
00960 filenames[1] = NULL;
00961 return inotifytools_watch_files( filenames, events );
00962 }
00963
00979 int inotifytools_watch_files( char const * filenames[], int events ) {
00980 niceassert( init, "inotifytools_initialize not called yet" );
00981 error = 0;
00982
00983 static int i;
00984 for ( i = 0; filenames[i]; ++i ) {
00985 static int wd;
00986 wd = inotify_add_watch( inotify_fd, filenames[i], events );
00987 if ( wd < 0 ) {
00988 if ( wd == -1 ) {
00989 error = errno;
00990 return 0;
00991 }
00992 else {
00993 fprintf( stderr, "Failed to watch %s: returned wd was %d "
00994 "(expected -1 or >0 )", filenames[i], wd );
00995
00996 return 0;
00997 }
00998 }
00999
01000 char *filename;
01001
01002 if ( !isdir(filenames[i])
01003 || filenames[i][strlen(filenames[i])-1] == '/') {
01004 filename = strdup(filenames[i]);
01005 }
01006 else {
01007 nasprintf( &filename, "%s/", filenames[i] );
01008 }
01009 create_watch(wd, filename);
01010 free(filename);
01011 }
01012
01013 return 1;
01014 }
01015
01042 struct inotify_event * inotifytools_next_event( int timeout ) {
01043 return inotifytools_next_events( timeout, 1 );
01044 }
01045
01046
01096 struct inotify_event * inotifytools_next_events( int timeout, int num_events ) {
01097 niceassert( init, "inotifytools_initialize not called yet" );
01098 niceassert( num_events <= MAX_EVENTS, "too many events requested" );
01099
01100 if ( num_events < 1 ) return NULL;
01101
01102 static struct inotify_event event[MAX_EVENTS];
01103 static struct inotify_event * ret;
01104 static int first_byte = 0;
01105 static ssize_t bytes;
01106 static jmp_buf jmp;
01107 static char match_name[MAX_STRLEN];
01108
01109 #define RETURN(A) {\
01110 if (regex) {\
01111 inotifytools_snprintf(match_name, MAX_STRLEN, A, "%w%f");\
01112 if (0 == regexec(regex, match_name, 0, 0, 0)) {\
01113 longjmp(jmp,0);\
01114 }\
01115 }\
01116 if ( collect_stats ) {\
01117 record_stats( A );\
01118 }\
01119 return A;\
01120 }
01121
01122 setjmp(jmp);
01123
01124 error = 0;
01125
01126
01127 if ( first_byte != 0
01128 && first_byte <= (int)(bytes - sizeof(struct inotify_event)) ) {
01129
01130 ret = (struct inotify_event *)((char *)&event[0] + first_byte);
01131 first_byte += sizeof(struct inotify_event) + ret->len;
01132
01133
01134
01135 if ( first_byte == bytes ) {
01136 first_byte = 0;
01137 }
01138 else if ( first_byte > bytes ) {
01139
01140
01141
01142
01143
01144
01145 niceassert( (long)((char *)&event[0] +
01146 sizeof(struct inotify_event) +
01147 event[0].len) <= (long)ret,
01148 "extremely unlucky user, death imminent" );
01149
01150 bytes = (char *)&event[0] + bytes - (char *)ret;
01151 memcpy( &event[0], ret, bytes );
01152 return inotifytools_next_events( timeout, num_events );
01153 }
01154 RETURN(ret);
01155
01156 }
01157
01158 else if ( first_byte == 0 ) {
01159 bytes = 0;
01160 }
01161
01162
01163 static ssize_t this_bytes;
01164 static unsigned int bytes_to_read;
01165 static int rc;
01166 static fd_set read_fds;
01167
01168 static struct timeval read_timeout;
01169 read_timeout.tv_sec = timeout;
01170 read_timeout.tv_usec = 0;
01171 static struct timeval * read_timeout_ptr;
01172 read_timeout_ptr = ( timeout <= 0 ? NULL : &read_timeout );
01173
01174 FD_ZERO(&read_fds);
01175 FD_SET(inotify_fd, &read_fds);
01176 rc = select(inotify_fd + 1, &read_fds,
01177 NULL, NULL, read_timeout_ptr);
01178 if ( rc < 0 ) {
01179
01180 error = errno;
01181 return NULL;
01182 }
01183 else if ( rc == 0 ) {
01184
01185 return NULL;
01186 }
01187
01188
01189 do {
01190 rc = ioctl( inotify_fd, FIONREAD, &bytes_to_read );
01191 } while ( !rc &&
01192 bytes_to_read < sizeof(struct inotify_event)*num_events );
01193
01194 if ( rc == -1 ) {
01195 error = errno;
01196 return NULL;
01197 }
01198
01199 this_bytes = read(inotify_fd, &event[0] + bytes,
01200 sizeof(struct inotify_event)*MAX_EVENTS - bytes);
01201 if ( this_bytes < 0 ) {
01202 error = errno;
01203 return NULL;
01204 }
01205 if ( this_bytes == 0 ) {
01206 fprintf(stderr, "Inotify reported end-of-file. Possibly too many "
01207 "events occurred at once.\n");
01208 return NULL;
01209 }
01210 bytes += this_bytes;
01211
01212 ret = &event[0];
01213 first_byte = sizeof(struct inotify_event) + ret->len;
01214 niceassert( first_byte <= bytes, "ridiculously long filename, things will "
01215 "almost certainly screw up." );
01216 if ( first_byte == bytes ) {
01217 first_byte = 0;
01218 }
01219
01220 RETURN(ret);
01221
01222 #undef RETURN
01223 }
01224
01250 int inotifytools_watch_recursively( char const * path, int events ) {
01251 return inotifytools_watch_recursively_with_exclude( path, events, 0 );
01252 }
01253
01286 int inotifytools_watch_recursively_with_exclude( char const * path, int events,
01287 char const ** exclude_list ) {
01288 niceassert( init, "inotifytools_initialize not called yet" );
01289
01290 DIR * dir;
01291 char * my_path;
01292 error = 0;
01293 dir = opendir( path );
01294 if ( !dir ) {
01295
01296 if ( errno == ENOTDIR ) {
01297 return inotifytools_watch_file( path, events );
01298 }
01299 else {
01300 error = errno;
01301 return 0;
01302 }
01303 }
01304
01305 if ( path[strlen(path)-1] != '/' ) {
01306 nasprintf( &my_path, "%s/", path );
01307 }
01308 else {
01309 my_path = (char *)path;
01310 }
01311
01312 static struct dirent * ent;
01313 char * next_file;
01314 static struct stat64 my_stat;
01315 ent = readdir( dir );
01316
01317 while ( ent ) {
01318 if ( (0 != strcmp( ent->d_name, "." )) &&
01319 (0 != strcmp( ent->d_name, ".." )) ) {
01320 nasprintf(&next_file,"%s%s", my_path, ent->d_name);
01321 if ( -1 == lstat64( next_file, &my_stat ) ) {
01322 error = errno;
01323 free( next_file );
01324 if ( errno != EACCES ) {
01325 error = errno;
01326 if ( my_path != path ) free( my_path );
01327 closedir( dir );
01328 return 0;
01329 }
01330 }
01331 else if ( S_ISDIR( my_stat.st_mode ) &&
01332 !S_ISLNK( my_stat.st_mode )) {
01333 free( next_file );
01334 nasprintf(&next_file,"%s%s/", my_path, ent->d_name);
01335 static unsigned int no_watch;
01336 static char const ** exclude_entry;
01337
01338 no_watch = 0;
01339 for (exclude_entry = exclude_list;
01340 exclude_entry && *exclude_entry && !no_watch;
01341 ++exclude_entry) {
01342 static int exclude_length;
01343
01344 exclude_length = strlen(*exclude_entry);
01345 if ((*exclude_entry)[exclude_length-1] == '/') {
01346 --exclude_length;
01347 }
01348 if ( strlen(next_file) == (unsigned)(exclude_length + 1) &&
01349 !strncmp(*exclude_entry, next_file, exclude_length)) {
01350
01351 no_watch = 1;
01352 }
01353 }
01354 if (!no_watch) {
01355 static int status;
01356 status = inotifytools_watch_recursively_with_exclude(
01357 next_file,
01358 events,
01359 exclude_list );
01360
01361 if ( !status && (EACCES != error) && (ENOENT != error) &&
01362 (ELOOP != error) ) {
01363 free( next_file );
01364 if ( my_path != path ) free( my_path );
01365 closedir( dir );
01366 return 0;
01367 }
01368 }
01369 free( next_file );
01370 }
01371 else {
01372 free( next_file );
01373 }
01374 }
01375 ent = readdir( dir );
01376 error = 0;
01377 }
01378
01379 closedir( dir );
01380
01381 int ret = inotifytools_watch_file( my_path, events );
01382 if ( my_path != path ) free( my_path );
01383 return ret;
01384 }
01385
01389 void record_stats( struct inotify_event const * event ) {
01390 if (!event) return;
01391 watch *w = watch_from_wd(event->wd);
01392 if (!w) return;
01393 if ( IN_ACCESS & event->mask ) {
01394 ++w->hit_access;
01395 ++num_access;
01396 }
01397 if ( IN_MODIFY & event->mask ) {
01398 ++w->hit_modify;
01399 ++num_modify;
01400 }
01401 if ( IN_ATTRIB & event->mask ) {
01402 ++w->hit_attrib;
01403 ++num_attrib;
01404 }
01405 if ( IN_CLOSE_WRITE & event->mask ) {
01406 ++w->hit_close_write;
01407 ++num_close_write;
01408 }
01409 if ( IN_CLOSE_NOWRITE & event->mask ) {
01410 ++w->hit_close_nowrite;
01411 ++num_close_nowrite;
01412 }
01413 if ( IN_OPEN & event->mask ) {
01414 ++w->hit_open;
01415 ++num_open;
01416 }
01417 if ( IN_MOVED_FROM & event->mask ) {
01418 ++w->hit_moved_from;
01419 ++num_moved_from;
01420 }
01421 if ( IN_MOVED_TO & event->mask ) {
01422 ++w->hit_moved_to;
01423 ++num_moved_to;
01424 }
01425 if ( IN_CREATE & event->mask ) {
01426 ++w->hit_create;
01427 ++num_create;
01428 }
01429 if ( IN_DELETE & event->mask ) {
01430 ++w->hit_delete;
01431 ++num_delete;
01432 }
01433 if ( IN_DELETE_SELF & event->mask ) {
01434 ++w->hit_delete_self;
01435 ++num_delete_self;
01436 }
01437 if ( IN_UNMOUNT & event->mask ) {
01438 ++w->hit_unmount;
01439 ++num_unmount;
01440 }
01441 if ( IN_MOVE_SELF & event->mask ) {
01442 ++w->hit_move_self;
01443 ++num_move_self;
01444 }
01445
01446 ++w->hit_total;
01447 ++num_total;
01448
01449 }
01450
01451 int *stat_ptr(watch *w, int event)
01452 {
01453 if ( IN_ACCESS == event )
01454 return &w->hit_access;
01455 if ( IN_MODIFY == event )
01456 return &w->hit_modify;
01457 if ( IN_ATTRIB == event )
01458 return &w->hit_attrib;
01459 if ( IN_CLOSE_WRITE == event )
01460 return &w->hit_close_write;
01461 if ( IN_CLOSE_NOWRITE == event )
01462 return &w->hit_close_nowrite;
01463 if ( IN_OPEN == event )
01464 return &w->hit_open;
01465 if ( IN_MOVED_FROM == event )
01466 return &w->hit_moved_from;
01467 if ( IN_MOVED_TO == event )
01468 return &w->hit_moved_to;
01469 if ( IN_CREATE == event )
01470 return &w->hit_create;
01471 if ( IN_DELETE == event )
01472 return &w->hit_delete;
01473 if ( IN_DELETE_SELF == event )
01474 return &w->hit_delete_self;
01475 if ( IN_UNMOUNT == event )
01476 return &w->hit_unmount;
01477 if ( IN_MOVE_SELF == event )
01478 return &w->hit_move_self;
01479 if ( 0 == event )
01480 return &w->hit_total;
01481 return 0;
01482 }
01483
01499 int inotifytools_get_stat_by_wd( int wd, int event ) {
01500 if (!collect_stats) return -1;
01501
01502 watch *w = watch_from_wd(wd);
01503 if (!w) return -1;
01504 int *i = stat_ptr(w, event);
01505 if (!i) return -1;
01506 return *i;
01507 }
01508
01522 int inotifytools_get_stat_total( int event ) {
01523 if (!collect_stats) return -1;
01524 if ( IN_ACCESS == event )
01525 return num_access;
01526 if ( IN_MODIFY == event )
01527 return num_modify;
01528 if ( IN_ATTRIB == event )
01529 return num_attrib;
01530 if ( IN_CLOSE_WRITE == event )
01531 return num_close_write;
01532 if ( IN_CLOSE_NOWRITE == event )
01533 return num_close_nowrite;
01534 if ( IN_OPEN == event )
01535 return num_open;
01536 if ( IN_MOVED_FROM == event )
01537 return num_moved_from;
01538 if ( IN_MOVED_TO == event )
01539 return num_moved_to;
01540 if ( IN_CREATE == event )
01541 return num_create;
01542 if ( IN_DELETE == event )
01543 return num_delete;
01544 if ( IN_DELETE_SELF == event )
01545 return num_delete_self;
01546 if ( IN_UNMOUNT == event )
01547 return num_unmount;
01548 if ( IN_MOVE_SELF == event )
01549 return num_move_self;
01550
01551 if ( 0 == event )
01552 return num_total;
01553
01554 return -1;
01555 }
01556
01576 int inotifytools_get_stat_by_filename( char const * filename,
01577 int event ) {
01578 return inotifytools_get_stat_by_wd( inotifytools_wd_from_filename(
01579 filename ), event );
01580 }
01581
01592 int inotifytools_error() {
01593 return error;
01594 }
01595
01599 int isdir( char const * path ) {
01600 static struct stat64 my_stat;
01601
01602 if ( -1 == lstat64( path, &my_stat ) ) {
01603 if (errno == ENOENT) return 0;
01604 fprintf(stderr, "Stat failed on %s: %s\n", path, strerror(errno));
01605 return 0;
01606 }
01607
01608 return S_ISDIR( my_stat.st_mode ) && !S_ISLNK( my_stat.st_mode );
01609 }
01610
01611
01618 int inotifytools_get_num_watches() {
01619 int ret = 0;
01620 rbwalk(tree_filename, get_num, (void*)&ret);
01621 return ret;
01622 }
01623
01664 int inotifytools_printf( struct inotify_event* event, char* fmt ) {
01665 return inotifytools_fprintf( stdout, event, fmt );
01666 }
01667
01709 int inotifytools_fprintf( FILE* file, struct inotify_event* event, char* fmt ) {
01710 static char out[MAX_STRLEN+1];
01711 static int ret;
01712 ret = inotifytools_sprintf( out, event, fmt );
01713 if ( -1 != ret ) fprintf( file, "%s", out );
01714 return ret;
01715 }
01716
01767 int inotifytools_sprintf( char * out, struct inotify_event* event, char* fmt ) {
01768 return inotifytools_snprintf( out, MAX_STRLEN, event, fmt );
01769 }
01770
01771
01818 int inotifytools_snprintf( char * out, int size,
01819 struct inotify_event* event, char* fmt ) {
01820 static char * filename, * eventname, * eventstr;
01821 static unsigned int i, ind;
01822 static char ch1;
01823 static char timestr[MAX_STRLEN];
01824 static time_t now;
01825
01826
01827 if ( event->len > 0 ) {
01828 eventname = event->name;
01829 }
01830 else {
01831 eventname = NULL;
01832 }
01833
01834
01835 filename = inotifytools_filename_from_wd( event->wd );
01836
01837 if ( !fmt || 0 == strlen(fmt) ) {
01838 error = EINVAL;
01839 return -1;
01840 }
01841 if ( strlen(fmt) > MAX_STRLEN || size > MAX_STRLEN) {
01842 error = EMSGSIZE;
01843 return -1;
01844 }
01845
01846 ind = 0;
01847 for ( i = 0; i < strlen(fmt) &&
01848 (int)ind < size - 1; ++i ) {
01849 if ( fmt[i] != '%' ) {
01850 out[ind++] = fmt[i];
01851 continue;
01852 }
01853
01854 if ( i == strlen(fmt) - 1 ) {
01855
01856 error = EINVAL;
01857 return ind;
01858 }
01859
01860 ch1 = fmt[i+1];
01861
01862 if ( ch1 == '%' ) {
01863 out[ind++] = '%';
01864 ++i;
01865 continue;
01866 }
01867
01868 if ( ch1 == 'w' ) {
01869 if ( filename ) {
01870 strncpy( &out[ind], filename, size - ind );
01871 ind += strlen(filename);
01872 }
01873 ++i;
01874 continue;
01875 }
01876
01877 if ( ch1 == 'f' ) {
01878 if ( eventname ) {
01879 strncpy( &out[ind], eventname, size - ind );
01880 ind += strlen(eventname);
01881 }
01882 ++i;
01883 continue;
01884 }
01885
01886 if ( ch1 == 'e' ) {
01887 eventstr = inotifytools_event_to_str( event->mask );
01888 strncpy( &out[ind], eventstr, size - ind );
01889 ind += strlen(eventstr);
01890 ++i;
01891 continue;
01892 }
01893
01894 if ( ch1 == 'T' ) {
01895
01896 if ( timefmt ) {
01897
01898 now = time(0);
01899 if ( 0 >= strftime( timestr, MAX_STRLEN-1, timefmt,
01900 localtime( &now ) ) ) {
01901
01902
01903 error = EINVAL;
01904 return ind;
01905 }
01906 }
01907 else {
01908 timestr[0] = 0;
01909 }
01910
01911 strncpy( &out[ind], timestr, size - ind );
01912 ind += strlen(timestr);
01913 ++i;
01914 continue;
01915 }
01916
01917
01918 if ( i < strlen(fmt) - 2 && fmt[i+2] == 'e' ) {
01919 eventstr = inotifytools_event_to_str_sep( event->mask, ch1 );
01920 strncpy( &out[ind], eventstr, size - ind );
01921 ind += strlen(eventstr);
01922 i += 2;
01923 continue;
01924 }
01925
01926
01927 if ( ind < MAX_STRLEN ) out[ind++] = '%';
01928 if ( ind < MAX_STRLEN ) out[ind++] = ch1;
01929 ++i;
01930 }
01931 out[ind] = 0;
01932
01933 return ind - 1;
01934 }
01935
01945 void inotifytools_set_printf_timefmt( char * fmt ) {
01946 timefmt = fmt;
01947 }
01948
01957 int inotifytools_get_max_queued_events() {
01958 int ret;
01959 if ( !read_num_from_file( QUEUE_SIZE_PATH, &ret ) ) return -1;
01960 return ret;
01961 }
01962
01972 int inotifytools_get_max_user_instances() {
01973 int ret;
01974 if ( !read_num_from_file( INSTANCES_PATH, &ret ) ) return -1;
01975 return ret;
01976 }
01977
01987 int inotifytools_get_max_user_watches() {
01988 int ret;
01989 if ( !read_num_from_file( WATCHES_SIZE_PATH, &ret ) ) return -1;
01990 return ret;
01991 }
01992
02004 int inotifytools_ignore_events_by_regex( char const *pattern, int flags ) {
02005 if (!pattern) {
02006 if (regex) {
02007 regfree(regex);
02008 free(regex);
02009 regex = 0;
02010 }
02011 return 1;
02012 }
02013
02014 if (regex) { regfree(regex); }
02015 else { regex = (regex_t *)malloc(sizeof(regex_t)); }
02016
02017 int ret = regcomp(regex, pattern, flags | REG_NOSUB);
02018 if (0 == ret) return 1;
02019
02020 regfree(regex);
02021 free(regex);
02022 regex = 0;
02023 error = EINVAL;
02024 return 0;
02025 }
02026
02027 int event_compare(const void *p1, const void *p2, const void *config)
02028 {
02029 if (!p1 || !p2) return p1 - p2;
02030 char asc = 1;
02031 int sort_event = (int)config;
02032 if (sort_event == -1) {
02033 sort_event = 0;
02034 asc = 0;
02035 } else if (sort_event < 0) {
02036 sort_event = -sort_event;
02037 asc = 0;
02038 }
02039 int *i1 = stat_ptr((watch*)p1, sort_event);
02040 int *i2 = stat_ptr((watch*)p2, sort_event);
02041 if (0 == *i1 - *i2) {
02042 return ((watch*)p1)->wd - ((watch*)p2)->wd;
02043 }
02044 if (asc)
02045 return *i1 - *i2;
02046 else
02047 return *i2 - *i1;
02048 }
02049
02050 struct rbtree *inotifytools_wd_sorted_by_event(int sort_event)
02051 {
02052 struct rbtree *ret = rbinit(event_compare, (void*)sort_event);
02053 RBLIST *all = rbopenlist(tree_wd);
02054 void const *p = rbreadlist(all);
02055 while (p) {
02056 void const *r = rbsearch(p, ret);
02057 niceassert((int)(r == p), "Couldn't insert watch into new tree");
02058 p = rbreadlist(all);
02059 }
02060 rbcloselist(all);
02061 return ret;
02062 }