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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
+.TH "FPUTC" 3P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" fputc
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.SH NAME
+fputc \- put a byte on a stream
+.SH SYNOPSIS
+.LP
+\fB#include <stdio.h>
+.br
+.sp
+int fputc(int\fP \fIc\fP\fB, FILE *\fP\fIstream\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The \fIfputc\fP() function shall write the byte specified by \fIc\fP
+(converted to an \fBunsigned char\fP) to the output
+stream pointed to by \fIstream\fP, at the position indicated by the
+associated file-position indicator for the stream (if
+defined), and shall advance the indicator appropriately. If the file
+cannot support positioning requests, or if the stream was
+opened with append mode, the byte shall be appended to the output
+stream.
+.LP
+The
+\fIst_ctime\fP and \fIst_mtime\fP fields of the file shall be marked
+for update between the successful execution of
+\fIfputc\fP() and the next successful completion of a call to \fIfflush\fP()
+or \fIfclose\fP() on the same stream or a call to \fIexit\fP()
+or \fIabort\fP().
+.SH RETURN VALUE
+.LP
+Upon successful completion, \fIfputc\fP() shall return the value it
+has written. Otherwise, it shall return EOF, the error
+indicator for the stream shall be set, and \fIerrno\fP shall be
+set to indicate the error.
+.SH ERRORS
+.LP
+The \fIfputc\fP() function shall fail if either the \fIstream\fP is
+unbuffered or the \fIstream\fP's buffer needs to be
+flushed, and:
+.TP 7
+.B EAGAIN
+The O_NONBLOCK flag is set for the file descriptor underlying \fIstream\fP
+and the process would be delayed in the write
+operation.
+.TP 7
+.B EBADF
+The file descriptor underlying \fIstream\fP is not a valid file descriptor
+open for writing.
+.TP 7
+.B EFBIG
+An
+attempt was made to write to a file that exceeds the maximum file
+size.
+.TP 7
+.B EFBIG
+An attempt was made to write to a file that exceeds the process' file
+size limit.
+.TP 7
+.B EFBIG
+The file is a regular file and an attempt was made to write at or
+beyond the offset maximum.
+.TP 7
+.B EINTR
+The write operation was terminated due to the receipt of a signal,
+and no data was transferred.
+.TP 7
+.B EIO
+A
+physical I/O error has occurred, or the process is a member of a background
+process group attempting to write to its controlling
+terminal, TOSTOP is set, the process is neither ignoring nor blocking
+SIGTTOU, and the process group of the process is orphaned.
+This error may also be returned under implementation-defined conditions.
+.TP 7
+.B ENOSPC
+There was no free space remaining on the device containing the file.
+.TP 7
+.B EPIPE
+An
+attempt is made to write to a pipe or FIFO that is not open for reading
+by any process. A SIGPIPE signal shall also be sent to the
+thread.
+.sp
+.LP
+The \fIfputc\fP() function may fail if:
+.TP 7
+.B ENOMEM
+Insufficient storage space is available.
+.TP 7
+.B ENXIO
+A
+request was made of a nonexistent device, or the request was outside
+the capabilities of the device.
+.sp
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.LP
+None.
+.SH APPLICATION USAGE
+.LP
+None.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIferror\fP(), \fIfopen\fP(), \fIgetrlimit\fP(), \fIputc\fP(),
+\fIputs\fP(), \fIsetbuf\fP(), \fIulimit\fP(), the Base Definitions
+volume of
+IEEE\ Std\ 1003.1-2001, \fI<stdio.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .