fsetpos, fsetpos64, fgetpos, fgetpos64 --
reposition a file pointer in a stream
int fsetpos(FILE stream, const fpos_t pos);
int fsetpos64(FILE stream, const fpos64_t pos);
int fgetpos(FILE stream, fpos_t pos);
int fgetpos64(FILE stream, fpos64_t pos);
fsetpos sets the position of the next input or output operation on
the stream according to the value of the object pointed to by pos.
The object pointed to by pos must be a value returned by an earlier
call to fgetpos on the same stream.
fsetpos clears the end-of-file indicator for the stream and undoes any
effects of the ungetc function on the same stream.
After fsetpos, the next operation on a file opened for update may be either
input or output.
fgetpos stores the current value of the file position indicator for
stream in the object pointed to by pos.
The value stored contains information usable by fsetpos for repositioning
the stream to its position at the time of the call to fgetpos.
If successful, fsetpos,
Otherwise, they all return nonzero and set errno to indicate
For example, errno is set by fgetpos
when the current value of the file position cannot be
represented correctly in an object of type fpos_t.
Considerations for large file support
fsetpos64 and fgetpos64 support large files,
but are otherwise identical to their counterparts.
For details on programming for large file capable applications, see
``Large File Support''
© 2004 The SCO Group, Inc. All rights reserved.
UnixWare 7 Release 7.1.4 - 25 April 2004