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Diffstat (limited to 'pkg/abi/linux/inotify.go')
| -rw-r--r-- | pkg/abi/linux/inotify.go | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/pkg/abi/linux/inotify.go b/pkg/abi/linux/inotify.go new file mode 100644 index 000000000..072a2d146 --- /dev/null +++ b/pkg/abi/linux/inotify.go @@ -0,0 +1,97 @@ +// Copyright 2018 Google Inc. +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// http://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +package linux + +// Inotify events observable by userspace. These directly correspond to +// filesystem operations and there may only be a single of them per inotify +// event read from an inotify fd. +const ( + // IN_ACCESS indicates a file was accessed. + IN_ACCESS = 0x00000001 + // IN_MODIFY indicates a file was modified. + IN_MODIFY = 0x00000002 + // IN_ATTRIB indicates a watch target's metadata changed. + IN_ATTRIB = 0x00000004 + // IN_CLOSE_WRITE indicates a writable file was closed. + IN_CLOSE_WRITE = 0x00000008 + // IN_CLOSE_NOWRITE indicates a non-writable file was closed. + IN_CLOSE_NOWRITE = 0x00000010 + // IN_OPEN indicates a file was opened. + IN_OPEN = 0x00000020 + // IN_MOVED_FROM indicates a file was moved from X. + IN_MOVED_FROM = 0x00000040 + // IN_MOVED_TO indicates a file was moved to Y. + IN_MOVED_TO = 0x00000080 + // IN_CREATE indicates a file was created in a watched directory. + IN_CREATE = 0x00000100 + // IN_DELETE indicates a file was deleted in a watched directory. + IN_DELETE = 0x00000200 + // IN_DELETE_SELF indicates a watch target itself was deleted. + IN_DELETE_SELF = 0x00000400 + // IN_MOVE_SELF indicates a watch target itself was moved. + IN_MOVE_SELF = 0x00000800 + // IN_ALL_EVENTS is a mask for all observable userspace events. + IN_ALL_EVENTS = 0x00000fff +) + +// Inotify control events. These may be present in their own events, or ORed +// with other observable events. +const ( + // IN_UNMOUNT indicates the backing filesystem was unmounted. + IN_UNMOUNT = 0x00002000 + // IN_Q_OVERFLOW indicates the event queued overflowed. + IN_Q_OVERFLOW = 0x00004000 + // IN_IGNORED indicates a watch was removed, either implicitly or through + // inotify_rm_watch(2). + IN_IGNORED = 0x00008000 + // IN_ISDIR indicates the subject of an event was a directory. + IN_ISDIR = 0x40000000 +) + +// Feature flags for inotify_add_watch(2). +const ( + // IN_ONLYDIR indicates that a path should be watched only if it's a + // directory. + IN_ONLYDIR = 0x01000000 + // IN_DONT_FOLLOW indicates that the watch path shouldn't be resolved if + // it's a symlink. + IN_DONT_FOLLOW = 0x02000000 + // IN_EXCL_UNLINK indicates events to this watch from unlinked objects + // should be filtered out. + IN_EXCL_UNLINK = 0x04000000 + // IN_MASK_ADD indicates the provided mask should be ORed into any existing + // watch on the provided path. + IN_MASK_ADD = 0x20000000 + // IN_ONESHOT indicates the watch should be removed after one event. + IN_ONESHOT = 0x80000000 +) + +// Feature flags for inotify_init1(2). +const ( + // IN_CLOEXEC is an alias for O_CLOEXEC. It indicates that the inotify + // fd should be closed on exec(2) and friends. + IN_CLOEXEC = 0x00080000 + // IN_NONBLOCK is an alias for O_NONBLOCK. It indicates I/O syscall on the + // inotify fd should not block. + IN_NONBLOCK = 0x00000800 +) + +// ALL_INOTIFY_BITS contains all the bits for all possible inotify events. It's +// defined in the Linux source at "include/linux/inotify.h". +const ALL_INOTIFY_BITS = IN_ACCESS | IN_MODIFY | IN_ATTRIB | IN_CLOSE_WRITE | + IN_CLOSE_NOWRITE | IN_OPEN | IN_MOVED_FROM | IN_MOVED_TO | IN_CREATE | + IN_DELETE | IN_DELETE_SELF | IN_MOVE_SELF | IN_UNMOUNT | IN_Q_OVERFLOW | + IN_IGNORED | IN_ONLYDIR | IN_DONT_FOLLOW | IN_EXCL_UNLINK | IN_MASK_ADD | + IN_ISDIR | IN_ONESHOT |