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+.\"	$NetBSD: getc.3,v 1.13 2019/09/02 00:30:58 sevan Exp $
+.\"
+.\" Copyright (c) 1990, 1991, 1993
+.\"	The Regents of the University of California.  All rights reserved.
+.\"
+.\" This code is derived from software contributed to Berkeley by
+.\" Chris Torek and the American National Standards Committee X3,
+.\" on Information Processing Systems.
+.\"
+.\" Redistribution and use in source and binary forms, with or without
+.\" modification, are permitted provided that the following conditions
+.\" are met:
+.\" 1. Redistributions of source code must retain the above copyright
+.\"    notice, this list of conditions and the following disclaimer.
+.\" 2. Redistributions in binary form must reproduce the above copyright
+.\"    notice, this list of conditions and the following disclaimer in the
+.\"    documentation and/or other materials provided with the distribution.
+.\" 3. Neither the name of the University nor the names of its contributors
+.\"    may be used to endorse or promote products derived from this software
+.\"    without specific prior written permission.
+.\"
+.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+.\" SUCH DAMAGE.
+.\"
+.\"     @(#)getc.3	8.1 (Berkeley) 6/4/93
+.\"
+.Dd September 2, 2019
+.Dt GETC 3
+.Os
+.Sh NAME
+.Nm fgetc ,
+.Nm getc ,
+.Nm getchar ,
+.Nm getc_unlocked ,
+.Nm getchar_unlocked ,
+.Nm getw
+.Nd get next character or word from input stream
+.Sh LIBRARY
+.Lb libc
+.Sh SYNOPSIS
+.In stdio.h
+.Ft int
+.Fn fgetc "FILE *stream"
+.Ft int
+.Fn getc "FILE *stream"
+.Ft int
+.Fn getchar
+.Ft int
+.Fn getc_unlocked "FILE *stream"
+.Ft int
+.Fn getchar_unlocked
+.Ft int
+.Fn getw "FILE *stream"
+.Sh DESCRIPTION
+The
+.Fn fgetc
+function
+obtains the next input character (if present) from the stream pointed at by
+.Fa stream ,
+or the next character pushed back on the stream via
+.Xr ungetc 3 .
+.Pp
+The
+.Fn getc
+function
+acts essentially identically to
+.Fn fgetc ,
+but is a macro that expands in-line.
+.Pp
+The
+.Fn getchar
+function
+is equivalent to:
+getc with the argument stdin.
+.Pp
+The
+.Fn getc_unlocked
+and
+.Fn getchar_unlocked
+functions provide functionality identical to that of
+.Fn getc
+and
+.Fn getchar ,
+respectively, but do not perform implicit locking of the streams they
+operate on.
+In multi-threaded programs they may be used
+.Em only
+within a scope in which the stream
+has been successfully locked by the calling thread using either
+.Xr flockfile 3
+or
+.Xr ftrylockfile 3 ,
+and may later be released using
+.Xr funlockfile 3 .
+.Pp
+The
+.Fn getw
+function
+obtains the next
+.Em int
+(if present)
+from the stream pointed at by
+.Fa stream .
+.Sh RETURN VALUES
+If successful, these routines return the next requested object
+from the
+.Fa stream .
+If the stream is at end-of-file or a read error occurs,
+the routines return
+.Dv EOF .
+The routines
+.Xr feof 3
+and
+.Xr ferror 3
+must be used to distinguish between end-of-file and error.
+If an error occurs, the global variable
+.Va errno
+is set to indicate the error.
+The end-of-file condition is remembered, even on a terminal, and all
+subsequent attempts to read will return
+.Dv EOF
+until the condition is cleared with
+.Xr clearerr 3 .
+.Sh SEE ALSO
+.Xr ferror 3 ,
+.Xr flockfile 3 ,
+.Xr fopen 3 ,
+.Xr fread 3 ,
+.Xr ftrylockfile 3 ,
+.Xr funlockfile 3 ,
+.Xr putc 3 ,
+.Xr ungetc 3
+.Sh STANDARDS
+The
+.Fn fgetc ,
+.Fn getc
+and
+.Fn getchar
+functions
+conform to
+.St -ansiC .
+The
+.Fn getc_unlocked
+and
+.Fn getchar_unlocked
+functions conform to
+.St -p1003.1-96 .
+.Sh HISTORY
+The
+.Fn getc
+and
+.Fn getw
+functions appeared in
+.At v1 .
+.Sh BUGS
+Since
+.Dv EOF
+is a valid integer value,
+.Xr feof 3
+and
+.Xr ferror 3
+must be used to check for failure after calling
+.Fn getw .
+The size and byte order of an
+.Em int
+varies from one machine to another, and
+.Fn getw
+is not recommended for portable applications.