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