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Linux 2.6 - man page for fsetpos (linux section 3posix)

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

       fsetpos - set current file position

       #include <stdio.h>

       int fsetpos(FILE *stream, const fpos_t *pos);

       The  fsetpos()  function  shall	set the file position and state indicators for the stream
       pointed to by stream according to the value of the object pointed to  by  pos,  which  the
       application shall ensure is a value obtained from an earlier call to fgetpos() on the same
       stream. If a read or write error occurs, the error indicator for the stream shall  be  set
       and fsetpos() fails.

       A  successful call to the fsetpos() function shall clear the end-of-file indicator for the
       stream and undo any effects of ungetc() on the same stream. After an fsetpos()  call,  the
       next operation on an update stream may be either input or output.

       The  behavior  of  fsetpos()  on devices which are incapable of seeking is implementation-
       defined. The value of the file offset associated with such a device is undefined.

       The fsetpos() function shall return 0 if it succeeds; otherwise, it shall  return  a  non-
       zero value and set errno to indicate the error.

       The  fsetpos()  function shall fail if,	  either the stream is unbuffered or the stream's
       buffer needed to be flushed, and the call to fsetpos() causes  an  underlying  lseek()  or
       write() to be invoked, and:

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

       EBADF  The file descriptor underlying the stream file is  not  open  for  writing  or  the
	      stream's buffer needed to be flushed and the file is not open.

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

       EFBIG  An attempt was made to write 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 associated with the corresponding stream.

       EINTR  The write operation was terminated due to the receipt of a signal, and no data  was

       EIO    A  physical  I/O	error  has  occurred,  or the process is a member of a background
	      process group attempting to perform a 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.

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

       ENXIO  A request was made of a nonexistent device, or the request was outside the capabil-
	      ities of the device.

       EPIPE  The file descriptor underlying stream is associated with a pipe or FIFO.

       EPIPE  An attempt was 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 following sections are informative.





       fopen()	, ftell() , lseek() , rewind() , ungetc() , write() , the Base Definitions volume
       of IEEE Std 1003.1-2001, <stdio.h>

       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 orig-
       inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .

IEEE/The Open Group			       2003				       FSETPOS(P)

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