NAME

       ftell, ftello - return a file offset in a stream

SYNOPSIS

       #include <stdio.h>

       long ftell(FILE *stream);

       off_t ftello(FILE *stream);

DESCRIPTION

       The ftell() function shall obtain the current value of the file-position indicator for the stream pointed
       to by stream.

       The ftello() function shall be equivalent to ftell(), except that the return value is of type off_t.

RETURN VALUE

       Upon  successful completion, ftell()    and ftello()  shall return the current value of the file-position
       indicator for the stream measured in bytes from the beginning of the file.

       Otherwise, ftell()    and ftello()  shall return -1, cast to long and off_t respectively, and  set  errno
       to indicate the error.

ERRORS

       The ftell()    and ftello()  functions shall fail if:

       EBADF  The file descriptor underlying stream is not an open file descriptor.

       EOVERFLOW
              For ftell(), the current file offset cannot be represented correctly in an object of type long.

       EOVERFLOW
              For ftello(), the current file offset cannot be represented correctly in an object of type off_t.

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

       The ftell() function may fail if:

       ESPIPE The file descriptor underlying stream is associated with a socket.

       The following sections are informative.

EXAMPLES

       None.

APPLICATION USAGE

       None.

RATIONALE

       None.

FUTURE DIRECTIONS

       None.

SEE ALSO

       fgetpos() , fopen() , fseek() , lseek() , 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                                              FTELL(P)