diff options
author | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-10-18 08:53:40 +0000 |
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committer | Theo de Raadt <deraadt@cvs.openbsd.org> | 1995-10-18 08:53:40 +0000 |
commit | d6583bb2a13f329cf0332ef2570eb8bb8fc0e39c (patch) | |
tree | ece253b876159b39c620e62b6c9b1174642e070e /lib/libc/stdio/getc.3 |
initial import of NetBSD tree
Diffstat (limited to 'lib/libc/stdio/getc.3')
-rw-r--r-- | lib/libc/stdio/getc.3 | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/lib/libc/stdio/getc.3 b/lib/libc/stdio/getc.3 new file mode 100644 index 00000000000..62de8f78a1b --- /dev/null +++ b/lib/libc/stdio/getc.3 @@ -0,0 +1,138 @@ +.\" $NetBSD: getc.3,v 1.3 1995/02/02 01:15:45 jtc 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. All advertising materials mentioning features or use of this software +.\" must display the following acknowledgement: +.\" This product includes software developed by the University of +.\" California, Berkeley and its contributors. +.\" 4. 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 June 4, 1993 +.Dt GETC 3 +.Os +.Sh NAME +.Nm fgetc , +.Nm getc , +.Nm getchar , +.Nm getw +.Nd get next character or word from input stream +.Sh SYNOPSIS +.Fd #include <stdio.h> +.Ft int +.Fn fgetc "FILE *stream" +.Ft int +.Fn getc "FILE *stream" +.Ft int +.Fn getchar +.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 . +.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 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 . +.Sh SEE ALSO +.Xr ferror 3 , +.Xr fread 3 , +.Xr fopen 3 , +.Xr putc 3 , +.Xr ungetc 3 +.Sh STANDARDS +The +.Fn fgetc , +.Fn getc +and +.Fn getchar +functions +conform to +.St -ansiC . +.Sh BUGS +Since +.Dv EOF +is a valid integer value, +.Xr feof +and +.Xr ferror +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. +.Pp |