NAME

       fsetpos - set current file position

SYNOPSIS

       #include <stdio.h>

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

DESCRIPTION

       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.

RETURN VALUE

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

ERRORS

       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 transferred.

       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  capabilities  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.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       fopen() , ftell() ,  lseek()  ,  rewind()  ,  ungetc()  ,  write()  ,  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                                            FSETPOS(P)