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61f3c91a67
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. This patch contains all the files, whose maintainer I could not get from ‘get_maintainer.pl’ script. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023124424.20177-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> [thuth: Adapted exec.c and qdev-monitor.c to new location] Signed-off-by: Thomas Huth <thuth@redhat.com>
128 lines
4 KiB
C
128 lines
4 KiB
C
/*
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* QEMU file monitor helper
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*
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* Copyright (c) 2018 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef QEMU_FILEMONITOR_H
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#define QEMU_FILEMONITOR_H
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typedef struct QFileMonitor QFileMonitor;
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typedef enum {
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/* File has been created in a dir */
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QFILE_MONITOR_EVENT_CREATED,
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/* File has been modified in a dir */
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QFILE_MONITOR_EVENT_MODIFIED,
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/* File has been deleted in a dir */
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QFILE_MONITOR_EVENT_DELETED,
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/* File has attributes changed */
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QFILE_MONITOR_EVENT_ATTRIBUTES,
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/* Dir is no longer being monitored (due to deletion) */
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QFILE_MONITOR_EVENT_IGNORED,
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} QFileMonitorEvent;
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/**
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* QFileMonitorHandler:
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* @id: id from qemu_file_monitor_add_watch()
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* @event: the file change that occurred
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* @filename: the name of the file affected
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* @opaque: opaque data provided to qemu_file_monitor_add_watch()
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*
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* Invoked whenever a file changes. If @event is
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* QFILE_MONITOR_EVENT_IGNORED, @filename will be
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* empty.
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*
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*/
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typedef void (*QFileMonitorHandler)(int64_t id,
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QFileMonitorEvent event,
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const char *filename,
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void *opaque);
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/**
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* qemu_file_monitor_new:
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* @errp: pointer to a NULL-initialized error object
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*
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* Create a handle for a file monitoring object.
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*
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* This object does locking internally to enable it to be
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* safe to use from multiple threads
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*
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* If the platform does not support file monitoring, an
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* error will be reported. Likewise if file monitoring
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* is supported, but cannot be initialized
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*
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* Currently this is implemented on Linux platforms with
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* the inotify subsystem.
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*
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* Returns: the new monitoring object, or NULL on error
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*/
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QFileMonitor *qemu_file_monitor_new(Error **errp);
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/**
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* qemu_file_monitor_free:
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* @mon: the file monitor context
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*
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* Free resources associated with the file monitor,
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* including any currently registered watches.
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*/
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void qemu_file_monitor_free(QFileMonitor *mon);
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/**
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* qemu_file_monitor_add_watch:
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* @mon: the file monitor context
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* @dirpath: the directory whose contents to watch
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* @filename: optional filename to filter on
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* @cb: the function to invoke when @dirpath has changes
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* @opaque: data to pass to @cb
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* @errp: pointer to a NULL-initialized error object
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*
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* Register to receive notifications of changes
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* in the directory @dirpath. All files in the
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* directory will be monitored. If the caller is
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* only interested in one specific file, @filename
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* can be used to filter events.
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*
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* Returns: a positive integer watch ID, or -1 on error
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*/
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int64_t qemu_file_monitor_add_watch(QFileMonitor *mon,
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const char *dirpath,
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const char *filename,
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QFileMonitorHandler cb,
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void *opaque,
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Error **errp);
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/**
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* qemu_file_monitor_remove_watch:
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* @mon: the file monitor context
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* @dirpath: the directory whose contents to unwatch
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* @id: id of the watch to remove
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*
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* Removes the file monitoring watch @id, associated
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* with the directory @dirpath. This must never be
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* called from a QFileMonitorHandler callback, or a
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* deadlock will result.
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*/
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void qemu_file_monitor_remove_watch(QFileMonitor *mon,
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const char *dirpath,
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int64_t id);
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#endif /* QEMU_FILEMONITOR_H */
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