Arguments

 

path

   The name of a file that is to be truncated. This argument must
   point to a pathname that names a regular file for which the
   calling process has write permission.
 

length

   The new length of the file, in bytes. The off_t type of length
   is either a 64-bit or 32-bit integer. The 64-bit interface allows
   for file sizes greater than 2 GB, and can be selected at compile
   time by defining the _LARGEFILE feature-test macro as follows:

   CC/DEFINE=_LARGEFILE