forked from enlightenment/efl
ecore_file_monitor: add kevent backend.
Summary: This is a very simple kevent backend, very similar to the eio_monitor implementation. On BSD systems, some core features within in E and other applications are always using the poll engine, which is not ideal. This is better, and simpler. Reviewers: devilhorns, raster, bu5hm4n, vtorri Reviewed By: vtorri Subscribers: vtorri, cedric, #reviewers, #committers Tags: #efl Differential Revision: https://phab.enlightenment.org/D12239
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <sys/types.h>
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#include <sys/event.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include "ecore_file_private.h"
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#define KEVENT_NUM_EVENTS 5
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typedef struct _Ecore_File_Monitor_Kevent Ecore_File_Monitor_Kevent;
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#define ECORE_FILE_MONITOR_KEVENT(x) ((Ecore_File_Monitor_Kevent *)(x))
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struct _Ecore_File_Monitor_Kevent
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{
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Ecore_File_Monitor monitor;
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Eina_List *prev;
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int fd;
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};
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typedef struct _File_Info File_Info;
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struct _File_Info
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{
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const char *path;
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Eina_Stat st;
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};
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static Ecore_Fd_Handler *_kevent_fdh = NULL;
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static Eina_Hash *_kevent_monitors = NULL;
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static Eina_Bool _ecore_file_monitor_kevent_handler(void *data, Ecore_Fd_Handler *fdh);
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static int _ecore_file_monitor_kevent_monitor(Ecore_File_Monitor *em, const char *path);
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static void _ecore_file_monitor_kevent_find(Ecore_File_Monitor *em);
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static void _ecore_file_monitor_kevent_hash_del_cb(void *data);
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static Eina_List * _ecore_file_monitor_kevent_ls(const char *directory);
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static void _ecore_file_monitor_kevent_ls_free(Eina_List *);
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int
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ecore_file_monitor_backend_init(void)
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{
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int fd;
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if (_kevent_fdh != NULL) return 0;
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fd = kqueue();
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if (fd < 0)
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return 0;
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_kevent_fdh = ecore_main_fd_handler_add(fd, ECORE_FD_READ, _ecore_file_monitor_kevent_handler,
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NULL, NULL, NULL);
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if (!_kevent_fdh)
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{
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close(fd);
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return 0;
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}
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_kevent_monitors = eina_hash_int32_new(_ecore_file_monitor_kevent_hash_del_cb);
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return 1;
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}
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int
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ecore_file_monitor_backend_shutdown(void)
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{
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int fd;
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if (!_kevent_fdh) return 1;
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eina_hash_free(_kevent_monitors);
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fd = ecore_main_fd_handler_fd_get(_kevent_fdh);
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ecore_main_fd_handler_del(_kevent_fdh);
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_kevent_fdh = NULL;
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if (fd != -1)
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close(fd);
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return 1;
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}
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Ecore_File_Monitor *
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ecore_file_monitor_backend_add(const char *path,
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void (*func) (void *data, Ecore_File_Monitor *em,
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Ecore_File_Event event,
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const char *path),
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void *data)
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{
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Ecore_File_Monitor *em;
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char *path2;
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size_t len;
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if (!path) return NULL;
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if (!func) return NULL;
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em = (Ecore_File_Monitor *)calloc(1, sizeof(Ecore_File_Monitor_Kevent));
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if (!em) return NULL;
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em->func = func;
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em->data = data;
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len = strlen(path);
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path2 = alloca(len + 1);
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strcpy(path2, path);
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if (path2[len - 1] == '/' && strcmp(path2, "/")) path2[len - 1] = 0;
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em->path = eina_stringshare_add(path2);
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if (!_ecore_file_monitor_kevent_monitor(em, em->path))
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return NULL;
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return em;
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}
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static Eina_List *
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_ecore_file_monitor_kevent_ls(const char *directory)
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{
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Eina_Iterator *it;
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Eina_File_Direct_Info *info;
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Eina_List *files = NULL;
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it = eina_file_direct_ls(directory);
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if (!it) return NULL;
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EINA_ITERATOR_FOREACH(it, info)
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{
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File_Info *file = malloc(sizeof(File_Info));
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if (eina_file_statat(eina_iterator_container_get(it), info, &file->st))
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{
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free(file);
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continue;
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}
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file->path = eina_stringshare_add(info->path);
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files = eina_list_append(files, file);
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}
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eina_iterator_free(it);
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return files;
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}
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static void
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_ecore_file_monitor_kevent_ls_free(Eina_List *list)
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{
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File_Info *file;
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EINA_LIST_FREE(list, file)
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{
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eina_stringshare_del(file->path);
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free(file);
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}
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}
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static void
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_ecore_file_monitor_kevent_hash_del_cb(void *data)
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{
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Ecore_File_Monitor *em = data;
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if (ECORE_FILE_MONITOR_KEVENT(em)->fd >= 0)
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close(ECORE_FILE_MONITOR_KEVENT(em)->fd);
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eina_stringshare_del(em->path);
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_ecore_file_monitor_kevent_ls_free(ECORE_FILE_MONITOR_KEVENT(em)->prev);
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free(em);
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}
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void
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ecore_file_monitor_backend_del(Ecore_File_Monitor *em)
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{
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eina_hash_del(_kevent_monitors, &(ECORE_FILE_MONITOR_KEVENT(em)->fd), em);
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}
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static Eina_Bool
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_ecore_file_monitor_kevent_handler(void *data EINA_UNUSED, Ecore_Fd_Handler *fdh)
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{
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Ecore_File_Monitor *em;
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struct kevent evs[KEVENT_NUM_EVENTS];
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int fd;
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const struct timespec timeout = { 0, 0 };
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fd = ecore_main_fd_handler_fd_get(fdh);
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if (fd < 0) return ECORE_CALLBACK_RENEW;
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int res = kevent(fd, 0, 0, evs, KEVENT_NUM_EVENTS, &timeout);
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for (int i = 0; i < res; i++)
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{
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em = eina_hash_find(_kevent_monitors, &evs[i].ident);
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if (evs[i].fflags & NOTE_DELETE)
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{
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em->func(em->data, em, ECORE_FILE_EVENT_DELETED_SELF, em->path);
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}
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if ((evs[i].fflags & NOTE_WRITE) || (evs[i].fflags & NOTE_ATTRIB))
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{
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_ecore_file_monitor_kevent_find(em);
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}
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}
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return ECORE_CALLBACK_RENEW;
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}
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static void
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_ecore_file_monitor_kevent_find(Ecore_File_Monitor *em)
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{
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Eina_List *l, *l2;
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File_Info *file, *file2;
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Eina_List *files;
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files = _ecore_file_monitor_kevent_ls(em->path);
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EINA_LIST_FOREACH(ECORE_FILE_MONITOR_KEVENT(em)->prev, l, file)
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{
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Eina_Bool exists = EINA_FALSE;
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EINA_LIST_FOREACH(files, l2, file2)
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{
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if (file->st.ino == file2->st.ino)
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{
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if (file->path == file2->path)
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exists = EINA_TRUE;
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if (file->st.mtime != file2->st.mtime)
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em->func(em->data, em, ECORE_FILE_EVENT_MODIFIED, file->path);
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}
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}
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if (!exists)
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{
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if (S_ISDIR(file->st.mode))
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em->func(em->data, em, ECORE_FILE_EVENT_DELETED_DIRECTORY, file->path);
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else
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em->func(em->data, em, ECORE_FILE_EVENT_DELETED_FILE, file->path);
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}
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}
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EINA_LIST_FOREACH(files, l, file)
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{
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Eina_Bool exists = EINA_FALSE;
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EINA_LIST_FOREACH(ECORE_FILE_MONITOR_KEVENT(em)->prev, l2, file2)
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{
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if ((file->path == file2->path) && (file->st.ino == file2->st.ino))
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{
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exists = EINA_TRUE;
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break;
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}
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}
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if (!exists)
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{
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if (S_ISDIR(file->st.mode))
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em->func(em->data, em, ECORE_FILE_EVENT_CREATED_DIRECTORY, file->path);
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else
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em->func(em->data, em, ECORE_FILE_EVENT_CREATED_FILE, file->path);
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}
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}
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_ecore_file_monitor_kevent_ls_free(ECORE_FILE_MONITOR_KEVENT(em)->prev);
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ECORE_FILE_MONITOR_KEVENT(em)->prev = files;
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}
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static int
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_ecore_file_monitor_kevent_monitor(Ecore_File_Monitor *em, const char *path)
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{
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struct kevent ev;
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int fd, res = 0;
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if ((!ecore_file_exists(path)) || (!ecore_file_is_dir(path)))
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return 0;
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fd = open(path, O_RDONLY);
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if (fd < 0)
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{
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INF("open failed, %s", strerror(errno));
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ecore_file_monitor_backend_del(em);
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return 0;
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}
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eina_file_close_on_exec(fd, EINA_TRUE);
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ECORE_FILE_MONITOR_KEVENT(em)->fd = fd;
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ECORE_FILE_MONITOR_KEVENT(em)->prev = _ecore_file_monitor_kevent_ls(em->path);
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eina_hash_direct_add(_kevent_monitors, &(ECORE_FILE_MONITOR_KEVENT(em)->fd), em);
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EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_CLEAR,
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NOTE_DELETE | NOTE_WRITE | NOTE_ATTRIB, 0, NULL);
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res = kevent(ecore_main_fd_handler_fd_get(_kevent_fdh), &ev, 1, 0, 0, 0);
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if (res)
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eina_hash_del(_kevent_monitors, &(ECORE_FILE_MONITOR_KEVENT(em)->fd), em);
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return 1;
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}
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@ -14,6 +14,8 @@ if sys_windows == true
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ecore_file_src += files([ 'ecore_file_monitor_win32.c'])
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elif sys_linux == true
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ecore_file_src += files([ 'ecore_file_monitor_inotify.c'])
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elif sys_bsd == true
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ecore_file_src += files([ 'ecore_file_monitor_kevent.c'])
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else
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ecore_file_src += files([ 'ecore_file_monitor_poll.c'])
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endif
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