fseeko64, ftello64: Determine Position and Reposition a Large File

fseeko64 and ftello64 are "large file" versions of fseek and ftell. They take and return INTEGER*8 file position offsets on Solaris 2.6 and Solaris 7. (A "large file" is larger than 2 Gigabytes and therefore a byte-position must be represented by a 64-bit integer.) Use these versions to determine and/or reposition large files.

fseeko64: Reposition a File on a Logical Unit

The function is called by:

On sequential files, following a call to fseeko64 by an output operation (e.g. WRITE) causes all data records following the fseek position to be deleted and replaced by the new data record (and an end-of-file mark). Rewriting a record in place can only be done with direct access files.

Example: fseeko64()--Reposition MyFile to two bytes from the beginning:

    INTEGER fseeko64, lunit/1/, from/0/, n
    INTEGER*8 offset/200/
    open( UNIT=lunit, FILE='MyFile' )
    n = fseeko64( lunit, offset, from )
    if ( n .gt. 0 ) stop 'fseek error'
    end

ftello64: Return Current Position of File

The function is called by:

Example: ftello64():

    INTEGER*8 ftello64, lunit/1/, n
    open( UNIT=lunit, FILE='MyFile' )
    ... 
    n = ftello64( lunit )
    if ( n .lt. 0 ) stop 'ftell error'
    ...