?? notify-inotify.c
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/* * * BlueZ - Bluetooth protocol stack for Linux * * Copyright (C) 2006-2008 Marcel Holtmann <marcel@holtmann.org> * * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */#ifdef HAVE_CONFIG_H#include <config.h>#endif#include <unistd.h>#include <stdlib.h>#include <string.h>#include <sys/inotify.h>#ifndef IN_ONLYDIR#define IN_ONLYDIR 0x01000000#endif#include <glib.h>#include "logging.h"#include "notify.h"static GIOChannel *io = NULL;static int fd = -1;static int wd = -1;static char *name = NULL;static notify_func callback = NULL;static gboolean io_event(GIOChannel *chan, GIOCondition cond, gpointer data){ unsigned char buf[129], *ptr = buf; gsize len; GIOError err; if (cond & (G_IO_HUP | G_IO_ERR)) return FALSE; memset(buf, 0, sizeof(buf)); err = g_io_channel_read(chan, (gchar *) buf, sizeof(buf) - 1, &len); if (err != G_IO_ERROR_NONE) { if (err == G_IO_ERROR_AGAIN) return TRUE; error("Reading from inotify channel failed"); return FALSE; } while (len >= sizeof(struct inotify_event)) { struct inotify_event *evt = (struct inotify_event *) ptr; if (evt->wd == wd && callback) { if (evt->mask & (IN_CREATE | IN_MOVED_TO)) callback(NOTIFY_CREATE, evt->name, NULL); if (evt->mask & (IN_DELETE | IN_MOVED_FROM)) callback(NOTIFY_DELETE, evt->name, NULL); if (evt->mask & IN_MODIFY) callback(NOTIFY_MODIFY, evt->name, NULL); } len -= sizeof(struct inotify_event) + evt->len; ptr += sizeof(struct inotify_event) + evt->len; } return TRUE;}void notify_init(void){ if (fd != -1) return; fd = inotify_init(); if (fd < 0) { error("Creation of inotify context failed"); return; } io = g_io_channel_unix_new(fd); if (!io) { error("Creation of inotify channel failed"); return; } g_io_add_watch(io, G_IO_IN | G_IO_ERR | G_IO_HUP, io_event, NULL);}void notify_close(void){ if (fd == -1) return; if (wd != -1) { inotify_rm_watch(fd, wd); wd = -1; } if (io) { g_io_channel_unref(io); io = NULL; } close(fd); fd = -1; if (name) { free(name); name = NULL; }}void notify_add(const char *pathname, notify_func func, void *user_data){ if (fd == -1 || wd != -1) return; if (name) free(name); name = strdup(pathname); if (!name) return; wd = inotify_add_watch(fd, pathname, IN_ONLYDIR | IN_CREATE | IN_DELETE | IN_MODIFY | IN_MOVE); if (wd < 0) error("Creation of watch for %s failed", pathname); callback = func;}void notify_remove(const char *pathname){ if (fd == -1 || wd == -1) return; inotify_rm_watch(fd, wd); wd = -1; callback = NULL;}
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