добавить часы к инициализированному экземпляру inotify (add a watch to an initialized inotify instance)
Имя (Name)
inotify_add_watch - add a watch to an initialized inotify
instance
Синопсис (Synopsis)
#include <sys/inotify.h>
int inotify_add_watch(int fd, const char *pathname, uint32_t mask);
Описание (Description)
inotify_add_watch() adds a new watch, or modifies an existing
watch, for the file whose location is specified in pathname; the
caller must have read permission for this file. The fd argument
is a file descriptor referring to the inotify instance whose
watch list is to be modified. The events to be monitored for
pathname are specified in the mask bit-mask argument. See
inotify(7) for a description of the bits that can be set in mask.
A successful call to inotify_add_watch() returns a unique watch
descriptor for this inotify instance, for the filesystem object
(inode) that corresponds to pathname. If the filesystem object
was not previously being watched by this inotify instance, then
the watch descriptor is newly allocated. If the filesystem
object was already being watched (perhaps via a different link to
the same object), then the descriptor for the existing watch is
returned.
The watch descriptor is returned by later read(2)s from the
inotify file descriptor. These reads fetch inotify_event
structures (see inotify(7)) indicating filesystem events; the
watch descriptor inside this structure identifies the object for
which the event occurred.
Возвращаемое значение (Return value)
On success, inotify_add_watch() returns a watch descriptor (a
nonnegative integer). On error, -1 is returned and errno is set
to indicate the error.
Ошибки (Error)
EACCES Read access to the given file is not permitted.
EBADF The given file descriptor is not valid.
EEXIST mask contains IN_MASK_CREATE and pathname refers to a file
already being watched by the same fd.
EFAULT pathname points outside of the process's accessible
address space.
EINVAL The given event mask contains no valid events; or mask
contains both IN_MASK_ADD and IN_MASK_CREATE; or fd is not
an inotify file descriptor.
ENAMETOOLONG
pathname is too long.
ENOENT A directory component in pathname does not exist or is a
dangling symbolic link.
ENOMEM Insufficient kernel memory was available.
ENOSPC The user limit on the total number of inotify watches was
reached or the kernel failed to allocate a needed
resource.
ENOTDIR
mask contains IN_ONLYDIR and pathname is not a directory.
Версии (Versions)
Inotify was merged into the 2.6.13 Linux kernel.
Стандарты (Conforming to)
This system call is Linux-specific.
Примеры (Examples)
See inotify(7).
Смотри также (See also)
inotify_init(2), inotify_rm_watch(2), inotify(7)
