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CHDIR — Change working directoryChange current working directory to a specified path.
This intrinsic is provided in both subroutine and function forms; however, only one form can be used in any given program unit.
GNU extension
Subroutine, function
| CALL CHDIR(NAME [, STATUS]) | 
| STATUS = CHDIR(NAME) | 
| NAME | The type shall be CHARACTERof default
kind and shall specify a valid path within the file system. | 
| STATUS | (Optional) INTEGERstatus flag of the default
kind.  Returns 0 on success, and a system specific and nonzero error code
otherwise. | 
PROGRAM test_chdir
  CHARACTER(len=255) :: path
  CALL getcwd(path)
  WRITE(*,*) TRIM(path)
  CALL chdir("/tmp")
  CALL getcwd(path)
  WRITE(*,*) TRIM(path)
END PROGRAM