1.\" $NetBSD: putc.3,v 1.3 1995/02/02 01:15:50 jtc Exp $ 2.\" 3.\" Copyright (c) 1990, 1991, 1993 4.\" The Regents of the University of California. All rights reserved. 5.\" 6.\" This code is derived from software contributed to Berkeley by 7.\" Chris Torek and the American National Standards Committee X3, 8.\" on Information Processing Systems. 9.\" 10.\" Redistribution and use in source and binary forms, with or without 11.\" modification, are permitted provided that the following conditions 12.\" are met: 13.\" 1. Redistributions of source code must retain the above copyright 14.\" notice, this list of conditions and the following disclaimer. 15.\" 2. Redistributions in binary form must reproduce the above copyright 16.\" notice, this list of conditions and the following disclaimer in the 17.\" documentation and/or other materials provided with the distribution. 18.\" 3. All advertising materials mentioning features or use of this software 19.\" must display the following acknowledgement: 20.\" This product includes software developed by the University of 21.\" California, Berkeley and its contributors. 22.\" 4. Neither the name of the University nor the names of its contributors 23.\" may be used to endorse or promote products derived from this software 24.\" without specific prior written permission. 25.\" 26.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36.\" SUCH DAMAGE. 37.\" 38.\" @(#)putc.3 8.1 (Berkeley) 6/4/93 39.\" 40.Dd June 4, 1993 41.Dt PUTC 3 42.Os 43.Sh NAME 44.Nm fputc , 45.Nm putc , 46.Nm putchar , 47.Nm putw 48.Nd output a character or word to a stream 49.Sh SYNOPSIS 50.Fd #include <stdio.h> 51.Ft int 52.Fn fputc "int c" "FILE *stream" 53.Ft int 54.Fn putc "int c" "FILE *stream" 55.Ft int 56.Fn putchar "int c" 57.Ft int 58.Fn putw "int w" "FILE *stream" 59.Sh DESCRIPTION 60The 61.Fn fputc 62function 63writes the character 64.Fa c 65(converted to an ``unsigned char'') 66to the output stream pointed to by 67.Fa stream . 68.Pp 69.Fn Putc 70acts essentially identically to 71.Fn fputc , 72but is a macro that expands in-line. It may evaluate 73.Fa stream 74more than once, so arguments given to 75.Fn putc 76should not be expressions with potential side effects. 77.Pp 78.Fn Putchar 79is identical to 80.Fn putc 81with an output stream of 82.Em stdout . 83.Pp 84The 85.Fn putw 86function 87writes the specified 88.Em int 89to the named output 90.Fa stream . 91.Sh RETURN VALUES 92The functions, 93.Fn fputc , 94.Fn putc 95and 96.Fn putchar 97return the character written. 98If an error occurs, the value 99.Dv EOF 100is returned. 101The 102.Fn putw 103function 104returns 0 on success; 105.Dv EOF 106is returned if 107a write error occurs, 108or if an attempt is made to write a read-only stream. 109.Sh SEE ALSO 110.Xr ferror 3 , 111.Xr fopen 3 , 112.Xr getc 3 , 113.Xr stdio 3 114.Sh STANDARDS 115The functions 116.Fn fputc , 117.Fn putc , 118and 119.Fn putchar , 120conform to 121.St -ansiC . 122A function 123.Fn putw 124function appeared in 125.At v6 . 126.Sh BUGS 127The size and byte order of an 128.Em int 129varies from one machine to another, and 130.Fn putw 131is not recommended for portable applications. 132