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FPUTC(P)		   POSIX Programmer's Manual		      FPUTC(P)

NAME
       fputc - put a byte on a stream

SYNOPSIS
       #include <stdio.h>

       int fputc(int c, FILE *stream);

DESCRIPTION
       The  fputc() function shall write the byte specified by c (converted to
       an unsigned char) to the output stream pointed to  by  stream,  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.

       The st_ctime and st_mtime fields of the file shall be marked for update
       between the successful execution of fputc()  and	 the  next  successful
       completion  of  a  call to fflush() or fclose() on the same stream or a
       call to exit() or abort().

RETURN VALUE
       Upon successful completion, fputc() shall return the value it has writ‐
       ten. Otherwise, it shall return EOF, the error indicator for the stream
       shall be set,	and errno shall be set to indicate the error.

ERRORS
       The fputc() function shall fail if either the stream is	unbuffered  or
       the stream's buffer needs to be flushed, and:

       EAGAIN The  O_NONBLOCK  flag  is set for the file descriptor underlying
	      stream and the process would be delayed in the write operation.

       EBADF  The file descriptor  underlying  stream  is  not	a  valid  file
	      descriptor open for writing.

       EFBIG  An  attempt was made to write to a file that exceeds the maximum
	      file size.

       EFBIG  An attempt was made to write to a file that exceeds the process'
	      file size limit.

       EFBIG  The  file	 is a regular file and an attempt was made to write at
	      or beyond the offset maximum.

       EINTR  The write operation was terminated due to the receipt of a  sig‐
	      nal, and no data was transferred.

       EIO    A physical I/O error has occurred, or the process is a member of
	      a background process group attempting to write to	 its  control‐
	      ling  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.

       ENOSPC There was no free space remaining on the device  containing  the
	      file.

       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.

       The fputc() function may fail if:

       ENOMEM Insufficient storage space is available.

       ENXIO  A	 request  was made of a nonexistent device, or the request was
	      outside the capabilities of the device.

       The following sections are informative.

EXAMPLES
       None.

APPLICATION USAGE
       None.

RATIONALE
       None.

FUTURE DIRECTIONS
       None.

SEE ALSO
       ferror() , fopen() ,  getrlimit()  ,  putc()  ,	puts()	,  setbuf()  ,
       ulimit()	  ,  the  Base	Definitions  volume  of	 IEEE Std 1003.1-2001,
       <stdio.h>

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 .

IEEE/The Open Group		     2003			      FPUTC(P)
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