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+.\" Copyright (C) 2005 Robert Love
+.\" and Copyright (C) 2008, Michael Kerrisk <mtk.manpages@gmail.com>
+.\"
+.\" SPDX-License-Identifier: GPL-2.0-or-later
+.\"
+.\" 2005-07-19 Robert Love <rlove@rlove.org> - initial version
+.\" 2006-02-07 mtk, minor changes
+.\" 2008-10-10 mtk: add description of inotify_init1()
+.\"
+.TH inotify_init 2 (date) "Linux man-pages (unreleased)"
+.SH NAME
+inotify_init, inotify_init1 \- initialize an inotify instance
+.SH LIBRARY
+Standard C library
+.RI ( libc ", " \-lc )
+.SH SYNOPSIS
+.nf
+.B #include <sys/inotify.h>
+.P
+.B "int inotify_init(void);"
+.BI "int inotify_init1(int " flags );
+.fi
+.SH DESCRIPTION
+For an overview of the inotify API, see
+.BR inotify (7).
+.P
+.BR inotify_init ()
+initializes a new inotify instance and returns a file descriptor associated
+with a new inotify event queue.
+.P
+If
+.I flags
+is 0, then
+.BR inotify_init1 ()
+is the same as
+.BR inotify_init ().
+The following values can be bitwise ORed in
+.I flags
+to obtain different behavior:
+.TP
+.B IN_NONBLOCK
+Set the
+.B O_NONBLOCK
+file status flag on the open file description (see
+.BR open (2))
+referred to by the new file descriptor.
+Using this flag saves extra calls to
+.BR fcntl (2)
+to achieve the same result.
+.TP
+.B IN_CLOEXEC
+Set the close-on-exec
+.RB ( FD_CLOEXEC )
+flag on the new file descriptor.
+See the description of the
+.B O_CLOEXEC
+flag in
+.BR open (2)
+for reasons why this may be useful.
+.SH RETURN VALUE
+On success, these system calls return a new file descriptor.
+On error, \-1 is returned, and
+.I errno
+is set to indicate the error.
+.SH ERRORS
+.TP
+.B EINVAL
+.RB ( inotify_init1 ())
+An invalid value was specified in
+.IR flags .
+.TP
+.B EMFILE
+The user limit on the total number of inotify instances has been reached.
+.TP
+.B EMFILE
+The per-process limit on the number of open file descriptors has been reached.
+.TP
+.B ENFILE
+The system-wide limit on the total number of open files has been reached.
+.TP
+.B ENOMEM
+Insufficient kernel memory is available.
+.SH STANDARDS
+Linux.
+.SH HISTORY
+.TP
+.BR inotify_init ()
+Linux 2.6.13,
+glibc 2.4.
+.TP
+.BR inotify_init1 ()
+Linux 2.6.27,
+glibc 2.9.
+.SH SEE ALSO
+.BR inotify_add_watch (2),
+.BR inotify_rm_watch (2),
+.BR inotify (7)