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 .