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
00122 #define MAX_EVENTS 4096
00123 #define MAX_STRLEN 4096
00124 #define INOTIFY_PROCDIR "/proc/sys/fs/inotify/"
00125 #define WATCHES_SIZE_PATH INOTIFY_PROCDIR "max_user_watches"
00126 #define QUEUE_SIZE_PATH INOTIFY_PROCDIR "max_queued_watches"
00127 #define INSTANCES_PATH INOTIFY_PROCDIR "max_user_instances"
00128
00129 static int inotify_fd;
00130 static unsigned num_access;
00131 static unsigned num_modify;
00132 static unsigned num_attrib;
00133 static unsigned num_close_nowrite;
00134 static unsigned num_close_write;
00135 static unsigned num_open;
00136 static unsigned num_move_self;
00137 static unsigned num_moved_to;
00138 static unsigned num_moved_from;
00139 static unsigned num_create;
00140 static unsigned num_delete;
00141 static unsigned num_delete_self;
00142 static unsigned num_unmount;
00143 static unsigned num_total;
00144 static int collect_stats = 0;
00145
00146 struct rbtree *tree_wd = 0;
00147 struct rbtree *tree_filename = 0;
00148 static int error = 0;
00149 static int init = 0;
00150 static char* timefmt = 0;
00151 static regex_t* regex = 0;
00152
00153 int isdir( char const * path );
00154 void record_stats( struct inotify_event const * event );
00155 int onestr_to_event(char const * event);
00156
00174 #define niceassert(cond,mesg) _niceassert((long)cond, __LINE__, __FILE__, \
00175 #cond, mesg)
00176
00177 #define nasprintf(...) niceassert( -1 != asprintf(__VA_ARGS__), "out of memory")
00178
00196 void _niceassert( long cond, int line, char const * file, char const * condstr,
00197 char const * mesg ) {
00198 if ( cond ) return;
00199
00200 if ( mesg ) {
00201 fprintf(stderr, "%s:%d assertion ( %s ) failed: %s\n", file, line,
00202 condstr, mesg );
00203 }
00204 else {
00205 fprintf(stderr, "%s:%d assertion ( %s ) failed.\n", file, line, condstr);
00206 }
00207 }
00208
00218 char * chrtostr(char ch) {
00219 static char str[2] = { '\0', '\0' };
00220 str[0] = ch;
00221 return str;
00222 }
00223
00227 int read_num_from_file( char * filename, int * num ) {
00228 FILE * file = fopen( filename, "r" );
00229 if ( !file ) {
00230 error = errno;
00231 return 0;
00232 }
00233
00234 if ( EOF == fscanf( file, "%d", num ) ) {
00235 error = errno;
00236 return 0;
00237 }
00238
00239 niceassert( 0 == fclose( file ), 0 );
00240
00241 return 1;
00242 }
00243
00244 int wd_compare(const void *d1, const void *d2, const void *config) {
00245 if (!d1 || !d2) return d1 - d2;
00246 return ((watch*)d1)->wd - ((watch*)d2)->wd;
00247 }
00248
00249 int filename_compare(const void *d1, const void *d2, const void *config) {
00250 if (!d1 || !d2) return d1 - d2;
00251 return strcmp(((watch*)d1)->filename, ((watch*)d2)->filename);
00252 }
00253
00257 watch *watch_from_wd( int wd ) {
00258 watch w;
00259 w.wd = wd;
00260 return (watch*)rbfind(&w, tree_wd);
00261 }
00262
00266 watch *watch_from_filename( char const *filename ) {
00267 watch w;
00268 w.filename = (char*)filename;
00269 return (watch*)rbfind(&w, tree_filename);
00270 }
00271
00281 int inotifytools_initialize() {
00282 if (init) return 1;
00283
00284 error = 0;
00285
00286 inotify_fd = inotify_init();
00287 if (inotify_fd < 0) {
00288 error = inotify_fd;
00289 return 0;
00290 }
00291
00292 collect_stats = 0;
00293 init = 1;
00294 tree_wd = rbinit(wd_compare, 0);
00295 tree_filename = rbinit(filename_compare, 0);
00296 timefmt = 0;
00297
00298 return 1;
00299 }
00300
00304 void destroy_watch(watch *w) {
00305 if (w->filename) free(w->filename);
00306 free(w);
00307 }
00308
00312 void cleanup_tree(const void *nodep,
00313 const VISIT which,
00314 const int depth, void* arg) {
00315 if (which != endorder && which != leaf) return;
00316 watch *w = (watch*)nodep;
00317 destroy_watch(w);
00318 }
00319
00326 void inotifytools_cleanup() {
00327 if (!init) return;
00328
00329 init = 0;
00330 close(inotify_fd);
00331 collect_stats = 0;
00332 error = 0;
00333 timefmt = 0;
00334
00335 if (regex) {
00336 regfree(regex);
00337 free(regex);
00338 regex = 0;
00339 }
00340
00341 rbwalk(tree_wd, cleanup_tree, 0);
00342 rbdestroy(tree_wd); tree_wd = 0;
00343 rbdestroy(tree_filename); tree_filename = 0;
00344 }
00345
00349 void empty_stats(const void *nodep,
00350 const VISIT which,
00351 const int depth, void *arg) {
00352 if (which != endorder && which != leaf) return;
00353 watch *w = (watch*)nodep;
00354 w->hit_access = 0;
00355 w->hit_modify = 0;
00356 w->hit_attrib = 0;
00357 w->hit_close_nowrite = 0;
00358 w->hit_close_write = 0;
00359 w->hit_open = 0;
00360 w->hit_move_self = 0;
00361 w->hit_moved_from = 0;
00362 w->hit_moved_to = 0;
00363 w->hit_create = 0;
00364 w->hit_delete = 0;
00365 w->hit_delete_self = 0;
00366 w->hit_unmount = 0;
00367 w->hit_total = 0;
00368 }
00369
00373 void replace_filename(const void *nodep,
00374 const VISIT which,
00375 const int depth, void *arg) {
00376 if (which != endorder && which != leaf) return;
00377 watch *w = (watch*)nodep;
00378 char *old_name = ((char**)arg)[0];
00379 char *new_name = ((char**)arg)[1];
00380 int old_len = *((int*)&((char**)arg)[2]);
00381 char *name;
00382 if ( 0 == strncmp( old_name, w->filename, old_len ) ) {
00383 nasprintf( &name, "%s%s", new_name, &(w->filename[old_len]) );
00384 if (!strcmp( w->filename, new_name )) {
00385 free(name);
00386 } else {
00387 rbdelete(w, tree_filename);
00388 free( w->filename );
00389 w->filename = name;
00390 rbsearch(w, tree_filename);
00391 }
00392 }
00393 }
00394
00398 void get_num(const void *nodep,
00399 const VISIT which,
00400 const int depth, void *arg) {
00401 if (which != endorder && which != leaf) return;
00402 ++(*((int*)arg));
00403 }
00404
00405
00418 void inotifytools_initialize_stats() {
00419 niceassert( init, "inotifytools_initialize not called yet" );
00420
00421
00422 if (collect_stats) {
00423 rbwalk(tree_wd, empty_stats, 0);
00424 }
00425
00426 num_access = 0;
00427 num_modify = 0;
00428 num_attrib = 0;
00429 num_close_nowrite = 0;
00430 num_close_write = 0;
00431 num_open = 0;
00432 num_move_self = 0;
00433 num_moved_from = 0;
00434 num_moved_to = 0;
00435 num_create = 0;
00436 num_delete = 0;
00437 num_delete_self = 0;
00438 num_unmount = 0;
00439 num_total = 0;
00440
00441 collect_stats = 1;
00442 }
00443
00471 int inotifytools_str_to_event_sep(char const * event, char sep) {
00472 if ( strchr( "_" "abcdefghijklmnopqrstuvwxyz"
00473 "ABCDEFGHIJKLMNOPQRSTUVWXYZ", sep ) ) {
00474 return -1;
00475 }
00476
00477 int ret, ret1, len;
00478 char * event1, * event2;
00479 char eventstr[4096];
00480 ret = 0;
00481
00482 if ( !event || !event[0] ) return 0;
00483
00484 event1 = (char *)event;
00485 event2 = strchr( event1, sep );
00486 while ( event1 && event1[0] ) {
00487 if ( event2 ) {
00488 len = event2 - event1;
00489 niceassert( len < 4096, "malformed event string (very long)" );
00490 }
00491 else {
00492 len = strlen(event1);
00493 }
00494 if ( len > 4095 ) len = 4095;
00495 strncpy( eventstr, event1, len );
00496 eventstr[len] = 0;
00497
00498 ret1 = onestr_to_event( eventstr );
00499 if ( 0 == ret1 || -1 == ret1 ) {
00500 ret = ret1;
00501 break;
00502 }
00503 ret |= ret1;
00504
00505 event1 = event2;
00506 if ( event1 && event1[0] ) {
00507
00508 ++event1;
00509
00510 if ( !event1[0] ) return 0;
00511 event2 = strchr( event1, sep );
00512 }
00513 }
00514
00515 return ret;
00516 }
00517
00541 int inotifytools_str_to_event(char const * event) {
00542 return inotifytools_str_to_event_sep( event, ',' );
00543 }
00544
00556 int onestr_to_event(char const * event)
00557 {
00558 static int ret;
00559 ret = -1;
00560
00561 if ( !event || !event[0] )
00562 ret = 0;
00563 else if ( 0 == strcasecmp(event, "ACCESS") )
00564 ret = IN_ACCESS;
00565 else if ( 0 == strcasecmp(event, "MODIFY") )
00566 ret = IN_MODIFY;
00567 else if ( 0 == strcasecmp(event, "ATTRIB") )
00568 ret = IN_ATTRIB;
00569 else if ( 0 == strcasecmp(event, "CLOSE_WRITE") )
00570 ret = IN_CLOSE_WRITE;
00571 else if ( 0 == strcasecmp(event, "CLOSE_NOWRITE") )
00572 ret = IN_CLOSE_NOWRITE;
00573 else if ( 0 == strcasecmp(event, "OPEN") )
00574 ret = IN_OPEN;
00575 else if ( 0 == strcasecmp(event, "MOVED_FROM") )
00576 ret = IN_MOVED_FROM;
00577 else if ( 0 == strcasecmp(event, "MOVED_TO") )
00578 ret = IN_MOVED_TO;
00579 else if ( 0 == strcasecmp(event, "CREATE") )
00580 ret = IN_CREATE;
00581 else if ( 0 == strcasecmp(event, "DELETE") )
00582 ret = IN_DELETE;
00583 else if ( 0 == strcasecmp(event, "DELETE_SELF") )
00584 ret = IN_DELETE_SELF;
00585 else if ( 0 == strcasecmp(event, "UNMOUNT") )
00586 ret = IN_UNMOUNT;
00587 else if ( 0 == strcasecmp(event, "Q_OVERFLOW") )
00588 ret = IN_Q_OVERFLOW;
00589 else if ( 0 == strcasecmp(event, "IGNORED") )
00590 ret = IN_IGNORED;
00591 else if ( 0 == strcasecmp(event, "CLOSE") )
00592 ret = IN_CLOSE;
00593 else if ( 0 == strcasecmp(event, "MOVE_SELF") )
00594 ret = IN_MOVE_SELF;
00595 else if ( 0 == strcasecmp(event, "MOVE") )
00596 ret = IN_MOVE;
00597 else if ( 0 == strcasecmp(event, "ISDIR") )
00598 ret = IN_ISDIR;
00599 else if ( 0 == strcasecmp(event, "ONESHOT") )
00600 ret = IN_ONESHOT;
00601 else if ( 0 == strcasecmp(event, "ALL_EVENTS") )
00602 ret = IN_ALL_EVENTS;
00603
00604 return ret;
00605 }
00606
00628 char * inotifytools_event_to_str(int events) {
00629 return inotifytools_event_to_str_sep(events, ',');
00630 }
00631
00656 char * inotifytools_event_to_str_sep(int events, char sep)
00657 {
00658 static char ret[1024];
00659 ret[0] = '\0';
00660 ret[1] = '\0';
00661
00662 if ( IN_ACCESS & events ) {
00663 strcat( ret, chrtostr(sep) );
00664 strcat( ret, "ACCESS" );
00665 }
00666 if ( IN_MODIFY & events ) {
00667 strcat( ret, chrtostr(sep) );
00668 strcat( ret, "MODIFY" );
00669 }
00670 if ( IN_ATTRIB & events ) {
00671 strcat( ret, chrtostr(sep) );
00672 strcat( ret, "ATTRIB" );
00673 }
00674 if ( IN_CLOSE_WRITE & events ) {
00675 strcat( ret, chrtostr(sep) );
00676 strcat( ret, "CLOSE_WRITE" );
00677 }
00678 if ( IN_CLOSE_NOWRITE & events ) {
00679 strcat( ret, chrtostr(sep) );
00680 strcat( ret, "CLOSE_NOWRITE" );
00681 }
00682 if ( IN_OPEN & events ) {
00683 strcat( ret, chrtostr(sep) );
00684 strcat( ret, "OPEN" );
00685 }
00686 if ( IN_MOVED_FROM & events ) {
00687 strcat( ret, chrtostr(sep) );
00688 strcat( ret, "MOVED_FROM" );
00689 }
00690 if ( IN_MOVED_TO & events ) {
00691 strcat( ret, chrtostr(sep) );
00692 strcat( ret, "MOVED_TO" );
00693 }
00694 if ( IN_CREATE & events ) {
00695 strcat( ret, chrtostr(sep) );
00696 strcat( ret, "CREATE" );
00697 }
00698 if ( IN_DELETE & events ) {
00699 strcat( ret, chrtostr(sep) );
00700 strcat( ret, "DELETE" );
00701 }
00702 if ( IN_DELETE_SELF & events ) {
00703 strcat( ret, chrtostr(sep) );
00704 strcat( ret, "DELETE_SELF" );
00705 }
00706 if ( IN_UNMOUNT & events ) {
00707 strcat( ret, chrtostr(sep) );
00708 strcat( ret, "UNMOUNT" );
00709 }
00710 if ( IN_Q_OVERFLOW & events ) {
00711 strcat( ret, chrtostr(sep) );
00712 strcat( ret, "Q_OVERFLOW" );
00713 }
00714 if ( IN_IGNORED & events ) {
00715 strcat( ret, chrtostr(sep) );
00716 strcat( ret, "IGNORED" );
00717 }
00718 if ( IN_CLOSE & events ) {
00719 strcat( ret, chrtostr(sep) );
00720 strcat( ret, "CLOSE" );
00721 }
00722 if ( IN_MOVE_SELF & events ) {
00723 strcat( ret, chrtostr(sep) );
00724 strcat( ret, "MOVE_SELF" );
00725 }
00726 if ( IN_ISDIR & events ) {
00727 strcat( ret, chrtostr(sep) );
00728 strcat( ret, "ISDIR" );
00729 }
00730 if ( IN_ONESHOT & events ) {
00731 strcat( ret, chrtostr(sep) );
00732 strcat( ret, "ONESHOT" );
00733 }
00734
00735
00736 if (ret[0] == '\0') {
00737 niceassert( -1 != sprintf( ret, "%c0x%08x", sep, events ), 0 );
00738 }
00739
00740 return &ret[1];
00741 }
00742
00763 char * inotifytools_filename_from_wd( int wd ) {
00764 niceassert( init, "inotifytools_initialize not called yet" );
00765 watch *w = watch_from_wd(wd);
00766 if (!w) return 0;
00767 return w->filename;
00768 }
00769
00784 int inotifytools_wd_from_filename( char const * filename ) {
00785 niceassert( init, "inotifytools_initialize not called yet" );
00786 watch *w = watch_from_filename(filename);
00787 if (!w) return -1;
00788 return w->wd;
00789 }
00790
00805 void inotifytools_set_filename_by_wd( int wd, char const * filename ) {
00806 niceassert( init, "inotifytools_initialize not called yet" );
00807 watch *w = watch_from_wd(wd);
00808 if (!w) return;
00809 if (w->filename) free(w->filename);
00810 w->filename = strdup(filename);
00811 }
00812
00827 void inotifytools_set_filename_by_filename( char const * oldname,
00828 char const * newname ) {
00829 watch *w = watch_from_filename(oldname);
00830 if (!w) return;
00831 if (w->filename) free(w->filename);
00832 w->filename = strdup(newname);
00833 }
00834
00857 void inotifytools_replace_filename( char const * oldname,
00858 char const * newname ) {
00859 if ( !oldname || !newname ) return;
00860 char *names[2+sizeof(int)/sizeof(char*)];
00861 names[0] = (char*)oldname;
00862 names[1] = (char*)newname;
00863 *((int*)&names[2]) = strlen(oldname);
00864 rbwalk(tree_filename, replace_filename, (void*)names);
00865 }
00866
00870 int remove_inotify_watch(watch *w) {
00871 error = 0;
00872 int status = inotify_rm_watch( inotify_fd, w->wd );
00873 if ( status < 0 ) {
00874 fprintf(stderr, "Failed to remove watch on %s: %s\n", w->filename,
00875 strerror(status) );
00876 error = status;
00877 return 0;
00878 }
00879 return 1;
00880 }
00881
00885 watch *create_watch(int wd, char *filename) {
00886 if ( wd <= 0 || !filename) return 0;
00887
00888 watch *w = (watch*)calloc(1, sizeof(watch));
00889 w->wd = wd;
00890 w->filename = strdup(filename);
00891 rbsearch(w, tree_wd);
00892 rbsearch(w, tree_filename);
00893 }
00894
00907 int inotifytools_remove_watch_by_wd( int wd ) {
00908 niceassert( init, "inotifytools_initialize not called yet" );
00909 watch *w = watch_from_wd(wd);
00910 if (!w) return 1;
00911
00912 if (!remove_inotify_watch(w)) return 0;
00913 rbdelete(w, tree_wd);
00914 rbdelete(w, tree_filename);
00915 destroy_watch(w);
00916 return 1;
00917 }
00918
00930 int inotifytools_remove_watch_by_filename( char const * filename ) {
00931 niceassert( init, "inotifytools_initialize not called yet" );
00932 watch *w = watch_from_filename(filename);
00933 if (!w) return 1;
00934
00935 if (!remove_inotify_watch(w)) return 0;
00936 rbdelete(w, tree_wd);
00937 rbdelete(w, tree_filename);
00938 destroy_watch(w);
00939 return 1;
00940 }
00941
00953 int inotifytools_watch_file( char const * filename, int events ) {
00954 static char const * filenames[2];
00955 filenames[0] = filename;
00956 filenames[1] = NULL;
00957 return inotifytools_watch_files( filenames, events );
00958 }
00959
00975 int inotifytools_watch_files( char const * filenames[], int events ) {
00976 niceassert( init, "inotifytools_initialize not called yet" );
00977 error = 0;
00978
00979 static int i;
00980 for ( i = 0; filenames[i]; ++i ) {
00981 static int wd;
00982 wd = inotify_add_watch( inotify_fd, filenames[i], events );
00983 if ( wd < 0 ) {
00984 if ( wd == -1 ) {
00985 error = errno;
00986 return 0;
00987 }
00988 else {
00989 fprintf( stderr, "Failed to watch %s: returned wd was %d "
00990 "(expected -1 or >0 )", filenames[i], wd );
00991
00992 return 0;
00993 }
00994 }
00995
00996 char *filename;
00997
00998 if ( !isdir(filenames[i])
00999 || filenames[i][strlen(filenames[i])-1] == '/') {
01000 filename = strdup(filenames[i]);
01001 }
01002 else {
01003 nasprintf( &filename, "%s/", filenames[i] );
01004 }
01005 create_watch(wd, filename);
01006 free(filename);
01007 }
01008
01009 return 1;
01010 }
01011
01038 struct inotify_event * inotifytools_next_event( int timeout ) {
01039 return inotifytools_next_events( timeout, 1 );
01040 }
01041
01042
01092 struct inotify_event * inotifytools_next_events( int timeout, int num_events ) {
01093 niceassert( init, "inotifytools_initialize not called yet" );
01094 niceassert( num_events <= MAX_EVENTS, "too many events requested" );
01095
01096 if ( num_events < 1 ) return NULL;
01097
01098 static struct inotify_event event[MAX_EVENTS];
01099 static struct inotify_event * ret;
01100 static int first_byte = 0;
01101 static ssize_t bytes;
01102 static jmp_buf jmp;
01103 static char match_name[MAX_STRLEN];
01104
01105 #define RETURN(A) {\
01106 if (regex) {\
01107 inotifytools_snprintf(match_name, MAX_STRLEN, A, "%w%f");\
01108 if (0 == regexec(regex, match_name, 0, 0, 0)) {\
01109 longjmp(jmp,0);\
01110 }\
01111 }\
01112 if ( collect_stats ) {\
01113 record_stats( A );\
01114 }\
01115 return A;\
01116 }
01117
01118 setjmp(jmp);
01119
01120 error = 0;
01121
01122
01123 if ( first_byte != 0
01124 && first_byte <= (int)(bytes - sizeof(struct inotify_event)) ) {
01125
01126 ret = (struct inotify_event *)((char *)&event[0] + first_byte);
01127 first_byte += sizeof(struct inotify_event) + ret->len;
01128
01129
01130
01131 if ( first_byte == bytes ) {
01132 first_byte = 0;
01133 }
01134 else if ( first_byte > bytes ) {
01135
01136
01137
01138
01139
01140
01141 niceassert( (long)((char *)&event[0] +
01142 sizeof(struct inotify_event) +
01143 event[0].len) <= (long)ret,
01144 "extremely unlucky user, death imminent" );
01145
01146 bytes = (char *)&event[0] + bytes - (char *)ret;
01147 memcpy( &event[0], ret, bytes );
01148 return inotifytools_next_events( timeout, num_events );
01149 }
01150 RETURN(ret);
01151
01152 }
01153
01154 else if ( first_byte == 0 ) {
01155 bytes = 0;
01156 }
01157
01158
01159 static ssize_t this_bytes;
01160 static unsigned int bytes_to_read;
01161 static int rc;
01162 static fd_set read_fds;
01163
01164 static struct timeval read_timeout;
01165 read_timeout.tv_sec = timeout;
01166 read_timeout.tv_usec = 0;
01167 static struct timeval * read_timeout_ptr;
01168 read_timeout_ptr = ( timeout <= 0 ? NULL : &read_timeout );
01169
01170 FD_ZERO(&read_fds);
01171 FD_SET(inotify_fd, &read_fds);
01172 rc = select(inotify_fd + 1, &read_fds,
01173 NULL, NULL, read_timeout_ptr);
01174 if ( rc < 0 ) {
01175
01176 error = errno;
01177 return NULL;
01178 }
01179 else if ( rc == 0 ) {
01180
01181 return NULL;
01182 }
01183
01184
01185 do {
01186 rc = ioctl( inotify_fd, FIONREAD, &bytes_to_read );
01187 } while ( !rc &&
01188 bytes_to_read < sizeof(struct inotify_event)*num_events );
01189
01190 if ( rc == -1 ) {
01191 error = errno;
01192 return NULL;
01193 }
01194
01195 this_bytes = read(inotify_fd, &event[0] + bytes,
01196 sizeof(struct inotify_event)*MAX_EVENTS - bytes);
01197 if ( this_bytes < 0 ) {
01198 error = errno;
01199 return NULL;
01200 }
01201 if ( this_bytes == 0 ) {
01202 fprintf(stderr, "Inotify reported end-of-file. Possibly too many "
01203 "events occurred at once.\n");
01204 return NULL;
01205 }
01206 bytes += this_bytes;
01207
01208 ret = &event[0];
01209 first_byte = sizeof(struct inotify_event) + ret->len;
01210 niceassert( first_byte <= bytes, "ridiculously long filename, things will "
01211 "almost certainly screw up." );
01212 if ( first_byte == bytes ) {
01213 first_byte = 0;
01214 }
01215
01216 RETURN(ret);
01217
01218 #undef RETURN
01219 }
01220
01246 int inotifytools_watch_recursively( char const * path, int events ) {
01247 return inotifytools_watch_recursively_with_exclude( path, events, 0 );
01248 }
01249
01282 int inotifytools_watch_recursively_with_exclude( char const * path, int events,
01283 char const ** exclude_list ) {
01284 niceassert( init, "inotifytools_initialize not called yet" );
01285
01286 DIR * dir;
01287 char * my_path;
01288 error = 0;
01289 dir = opendir( path );
01290 if ( !dir ) {
01291
01292 if ( errno == ENOTDIR ) {
01293 return inotifytools_watch_file( path, events );
01294 }
01295 else {
01296 error = errno;
01297 return 0;
01298 }
01299 }
01300
01301 if ( path[strlen(path)-1] != '/' ) {
01302 nasprintf( &my_path, "%s/", path );
01303 }
01304 else {
01305 my_path = (char *)path;
01306 }
01307
01308 static struct dirent * ent;
01309 char * next_file;
01310 static struct stat64 my_stat;
01311 ent = readdir( dir );
01312
01313 while ( ent ) {
01314 if ( (0 != strcmp( ent->d_name, "." )) &&
01315 (0 != strcmp( ent->d_name, ".." )) ) {
01316 nasprintf(&next_file,"%s%s", my_path, ent->d_name);
01317 if ( -1 == lstat64( next_file, &my_stat ) ) {
01318 error = errno;
01319 free( next_file );
01320 if ( errno != EACCES ) {
01321 error = errno;
01322 if ( my_path != path ) free( my_path );
01323 closedir( dir );
01324 return 0;
01325 }
01326 }
01327 else if ( S_ISDIR( my_stat.st_mode ) &&
01328 !S_ISLNK( my_stat.st_mode )) {
01329 free( next_file );
01330 nasprintf(&next_file,"%s%s/", my_path, ent->d_name);
01331 static unsigned int no_watch;
01332 static char const ** exclude_entry;
01333
01334 no_watch = 0;
01335 for (exclude_entry = exclude_list;
01336 exclude_entry && *exclude_entry && !no_watch;
01337 ++exclude_entry) {
01338 static int exclude_length;
01339
01340 exclude_length = strlen(*exclude_entry);
01341 if ((*exclude_entry)[exclude_length-1] == '/') {
01342 --exclude_length;
01343 }
01344 if ( strlen(next_file) == (unsigned)(exclude_length + 1) &&
01345 !strncmp(*exclude_entry, next_file, exclude_length)) {
01346
01347 no_watch = 1;
01348 }
01349 }
01350 if (!no_watch) {
01351 static int status;
01352 status = inotifytools_watch_recursively_with_exclude(
01353 next_file,
01354 events,
01355 exclude_list );
01356
01357 if ( !status && (EACCES != error) && (ENOENT != error) &&
01358 (ELOOP != error) ) {
01359 free( next_file );
01360 if ( my_path != path ) free( my_path );
01361 closedir( dir );
01362 return 0;
01363 }
01364 }
01365 free( next_file );
01366 }
01367 else {
01368 free( next_file );
01369 }
01370 }
01371 ent = readdir( dir );
01372 error = 0;
01373 }
01374
01375 closedir( dir );
01376
01377 int ret = inotifytools_watch_file( my_path, events );
01378 if ( my_path != path ) free( my_path );
01379 return ret;
01380 }
01381
01385 void record_stats( struct inotify_event const * event ) {
01386 if (!event) return;
01387 watch *w = watch_from_wd(event->wd);
01388 if (!w) return;
01389 if ( IN_ACCESS & event->mask ) {
01390 ++w->hit_access;
01391 ++num_access;
01392 }
01393 if ( IN_MODIFY & event->mask ) {
01394 ++w->hit_modify;
01395 ++num_modify;
01396 }
01397 if ( IN_ATTRIB & event->mask ) {
01398 ++w->hit_attrib;
01399 ++num_attrib;
01400 }
01401 if ( IN_CLOSE_WRITE & event->mask ) {
01402 ++w->hit_close_write;
01403 ++num_close_write;
01404 }
01405 if ( IN_CLOSE_NOWRITE & event->mask ) {
01406 ++w->hit_close_nowrite;
01407 ++num_close_nowrite;
01408 }
01409 if ( IN_OPEN & event->mask ) {
01410 ++w->hit_open;
01411 ++num_open;
01412 }
01413 if ( IN_MOVED_FROM & event->mask ) {
01414 ++w->hit_moved_from;
01415 ++num_moved_from;
01416 }
01417 if ( IN_MOVED_TO & event->mask ) {
01418 ++w->hit_moved_to;
01419 ++num_moved_to;
01420 }
01421 if ( IN_CREATE & event->mask ) {
01422 ++w->hit_create;
01423 ++num_create;
01424 }
01425 if ( IN_DELETE & event->mask ) {
01426 ++w->hit_delete;
01427 ++num_delete;
01428 }
01429 if ( IN_DELETE_SELF & event->mask ) {
01430 ++w->hit_delete_self;
01431 ++num_delete_self;
01432 }
01433 if ( IN_UNMOUNT & event->mask ) {
01434 ++w->hit_unmount;
01435 ++num_unmount;
01436 }
01437 if ( IN_MOVE_SELF & event->mask ) {
01438 ++w->hit_move_self;
01439 ++num_move_self;
01440 }
01441
01442 ++w->hit_total;
01443 ++num_total;
01444
01445 }
01446
01447 int *stat_ptr(watch *w, int event)
01448 {
01449 if ( IN_ACCESS == event )
01450 return &w->hit_access;
01451 if ( IN_MODIFY == event )
01452 return &w->hit_modify;
01453 if ( IN_ATTRIB == event )
01454 return &w->hit_attrib;
01455 if ( IN_CLOSE_WRITE == event )
01456 return &w->hit_close_write;
01457 if ( IN_CLOSE_NOWRITE == event )
01458 return &w->hit_close_nowrite;
01459 if ( IN_OPEN == event )
01460 return &w->hit_open;
01461 if ( IN_MOVED_FROM == event )
01462 return &w->hit_moved_from;
01463 if ( IN_MOVED_TO == event )
01464 return &w->hit_moved_to;
01465 if ( IN_CREATE == event )
01466 return &w->hit_create;
01467 if ( IN_DELETE == event )
01468 return &w->hit_delete;
01469 if ( IN_DELETE_SELF == event )
01470 return &w->hit_delete_self;
01471 if ( IN_UNMOUNT == event )
01472 return &w->hit_unmount;
01473 if ( IN_MOVE_SELF == event )
01474 return &w->hit_move_self;
01475 if ( 0 == event )
01476 return &w->hit_total;
01477 return 0;
01478 }
01479
01495 int inotifytools_get_stat_by_wd( int wd, int event ) {
01496 if (!collect_stats) return -1;
01497
01498 watch *w = watch_from_wd(wd);
01499 if (!w) return -1;
01500 int *i = stat_ptr(w, event);
01501 if (!i) return -1;
01502 return *i;
01503 }
01504
01518 int inotifytools_get_stat_total( int event ) {
01519 if (!collect_stats) return -1;
01520 if ( IN_ACCESS == event )
01521 return num_access;
01522 if ( IN_MODIFY == event )
01523 return num_modify;
01524 if ( IN_ATTRIB == event )
01525 return num_attrib;
01526 if ( IN_CLOSE_WRITE == event )
01527 return num_close_write;
01528 if ( IN_CLOSE_NOWRITE == event )
01529 return num_close_nowrite;
01530 if ( IN_OPEN == event )
01531 return num_open;
01532 if ( IN_MOVED_FROM == event )
01533 return num_moved_from;
01534 if ( IN_MOVED_TO == event )
01535 return num_moved_to;
01536 if ( IN_CREATE == event )
01537 return num_create;
01538 if ( IN_DELETE == event )
01539 return num_delete;
01540 if ( IN_DELETE_SELF == event )
01541 return num_delete_self;
01542 if ( IN_UNMOUNT == event )
01543 return num_unmount;
01544 if ( IN_MOVE_SELF == event )
01545 return num_move_self;
01546
01547 if ( 0 == event )
01548 return num_total;
01549
01550 return -1;
01551 }
01552
01572 int inotifytools_get_stat_by_filename( char const * filename,
01573 int event ) {
01574 return inotifytools_get_stat_by_wd( inotifytools_wd_from_filename(
01575 filename ), event );
01576 }
01577
01588 int inotifytools_error() {
01589 return error;
01590 }
01591
01595 int isdir( char const * path ) {
01596 static struct stat64 my_stat;
01597
01598 if ( -1 == lstat64( path, &my_stat ) ) {
01599 if (errno == ENOENT) return 0;
01600 fprintf(stderr, "Stat failed on %s: %s\n", path, strerror(errno));
01601 return 0;
01602 }
01603
01604 return S_ISDIR( my_stat.st_mode ) && !S_ISLNK( my_stat.st_mode );
01605 }
01606
01607
01614 int inotifytools_get_num_watches() {
01615 int ret = 0;
01616 rbwalk(tree_filename, get_num, (void*)&ret);
01617 return ret;
01618 }
01619
01660 int inotifytools_printf( struct inotify_event* event, char* fmt ) {
01661 return inotifytools_fprintf( stdout, event, fmt );
01662 }
01663
01705 int inotifytools_fprintf( FILE* file, struct inotify_event* event, char* fmt ) {
01706 static char out[MAX_STRLEN+1];
01707 static int ret;
01708 ret = inotifytools_sprintf( out, event, fmt );
01709 if ( -1 != ret ) fprintf( file, "%s", out );
01710 return ret;
01711 }
01712
01763 int inotifytools_sprintf( char * out, struct inotify_event* event, char* fmt ) {
01764 return inotifytools_snprintf( out, MAX_STRLEN, event, fmt );
01765 }
01766
01767
01814 int inotifytools_snprintf( char * out, int size,
01815 struct inotify_event* event, char* fmt ) {
01816 static char * filename, * eventname, * eventstr;
01817 static unsigned int i, ind;
01818 static char ch1;
01819 static char timestr[MAX_STRLEN];
01820 static time_t now;
01821
01822
01823 if ( event->len > 0 ) {
01824 eventname = event->name;
01825 }
01826 else {
01827 eventname = NULL;
01828 }
01829
01830
01831 filename = inotifytools_filename_from_wd( event->wd );
01832
01833 if ( !fmt || 0 == strlen(fmt) ) {
01834 error = EINVAL;
01835 return -1;
01836 }
01837 if ( strlen(fmt) > MAX_STRLEN || size > MAX_STRLEN) {
01838 error = EMSGSIZE;
01839 return -1;
01840 }
01841
01842 ind = 0;
01843 for ( i = 0; i < strlen(fmt) &&
01844 (int)ind < size - 1; ++i ) {
01845 if ( fmt[i] != '%' ) {
01846 out[ind++] = fmt[i];
01847 continue;
01848 }
01849
01850 if ( i == strlen(fmt) - 1 ) {
01851
01852 error = EINVAL;
01853 return ind;
01854 }
01855
01856 ch1 = fmt[i+1];
01857
01858 if ( ch1 == '%' ) {
01859 out[ind++] = '%';
01860 ++i;
01861 continue;
01862 }
01863
01864 if ( ch1 == 'w' ) {
01865 if ( filename ) {
01866 strncpy( &out[ind], filename, size - ind );
01867 ind += strlen(filename);
01868 }
01869 ++i;
01870 continue;
01871 }
01872
01873 if ( ch1 == 'f' ) {
01874 if ( eventname ) {
01875 strncpy( &out[ind], eventname, size - ind );
01876 ind += strlen(eventname);
01877 }
01878 ++i;
01879 continue;
01880 }
01881
01882 if ( ch1 == 'e' ) {
01883 eventstr = inotifytools_event_to_str( event->mask );
01884 strncpy( &out[ind], eventstr, size - ind );
01885 ind += strlen(eventstr);
01886 ++i;
01887 continue;
01888 }
01889
01890 if ( ch1 == 'T' ) {
01891
01892 if ( timefmt ) {
01893
01894 now = time(0);
01895 if ( 0 >= strftime( timestr, MAX_STRLEN-1, timefmt,
01896 localtime( &now ) ) ) {
01897
01898
01899 error = EINVAL;
01900 return ind;
01901 }
01902 }
01903 else {
01904 timestr[0] = 0;
01905 }
01906
01907 strncpy( &out[ind], timestr, size - ind );
01908 ind += strlen(timestr);
01909 ++i;
01910 continue;
01911 }
01912
01913
01914 if ( i < strlen(fmt) - 2 && fmt[i+2] == 'e' ) {
01915 eventstr = inotifytools_event_to_str_sep( event->mask, ch1 );
01916 strncpy( &out[ind], eventstr, size - ind );
01917 ind += strlen(eventstr);
01918 i += 2;
01919 continue;
01920 }
01921
01922
01923 if ( ind < MAX_STRLEN ) out[ind++] = '%';
01924 if ( ind < MAX_STRLEN ) out[ind++] = ch1;
01925 ++i;
01926 }
01927 out[ind] = 0;
01928
01929 return ind - 1;
01930 }
01931
01941 void inotifytools_set_printf_timefmt( char * fmt ) {
01942 timefmt = fmt;
01943 }
01944
01953 int inotifytools_get_max_queued_events() {
01954 int ret;
01955 if ( !read_num_from_file( QUEUE_SIZE_PATH, &ret ) ) return -1;
01956 return ret;
01957 }
01958
01968 int inotifytools_get_max_user_instances() {
01969 int ret;
01970 if ( !read_num_from_file( INSTANCES_PATH, &ret ) ) return -1;
01971 return ret;
01972 }
01973
01983 int inotifytools_get_max_user_watches() {
01984 int ret;
01985 if ( !read_num_from_file( WATCHES_SIZE_PATH, &ret ) ) return -1;
01986 return ret;
01987 }
01988
02000 int inotifytools_ignore_events_by_regex( char const *pattern, int flags ) {
02001 if (!pattern) {
02002 if (regex) {
02003 regfree(regex);
02004 free(regex);
02005 regex = 0;
02006 }
02007 return 1;
02008 }
02009
02010 if (regex) { regfree(regex); }
02011 else { regex = (regex_t *)malloc(sizeof(regex_t)); }
02012
02013 int ret = regcomp(regex, pattern, flags | REG_NOSUB);
02014 if (0 == ret) return 1;
02015
02016 regfree(regex);
02017 free(regex);
02018 regex = 0;
02019 error = EINVAL;
02020 return 0;
02021 }
02022
02023 int event_compare(const void *p1, const void *p2, const void *config)
02024 {
02025 if (!p1 || !p2) return p1 - p2;
02026 char asc = 1;
02027 int sort_event = (int)config;
02028 if (sort_event == -1) {
02029 sort_event = 0;
02030 asc = 0;
02031 } else if (sort_event < 0) {
02032 sort_event = -sort_event;
02033 asc = 0;
02034 }
02035 int *i1 = stat_ptr((watch*)p1, sort_event);
02036 int *i2 = stat_ptr((watch*)p2, sort_event);
02037 if (0 == *i1 - *i2) {
02038 return ((watch*)p1)->wd - ((watch*)p2)->wd;
02039 }
02040 if (asc)
02041 return *i1 - *i2;
02042 else
02043 return *i2 - *i1;
02044 }
02045
02046 struct rbtree *inotifytools_wd_sorted_by_event(int sort_event)
02047 {
02048 struct rbtree *ret = rbinit(event_compare, (void*)sort_event);
02049 RBLIST *all = rbopenlist(tree_wd);
02050 void const *p = rbreadlist(all);
02051 while (p) {
02052 void const *r = rbsearch(p, ret);
02053 niceassert((int)(r == p), "Couldn't insert watch into new tree");
02054 p = rbreadlist(all);
02055 }
02056 rbcloselist(all);
02057 return ret;
02058 }