use M_io, only : notopen, print_inquire, read_table, filename_generator
      use M_io, only : dirname, splitpath, joinpath, get_tmp, scratch, uniq, basename
      use M_io, only : separator, getname, which, lookfor
      use M_io, only : read_line, getline, rd, get_next_char
      use M_io, only : fileopen, fileclose, filedelete, filewrite, fileread, filebyte
      use M_io, only : number_of_lines
      use M_io, only : get_env, is_hidden_file
      use M_io, only : putchar, getchar
      

• READING DATA SEQUENTIALLY
  • READ_LINE - read line as long as programming environment line length limit cleaning up input line
  • GETLINE - read line as long as programming environment line length limit
  • RD - ask for string from standard input with user-definable prompt
  • READ_TABLE - read a file into a numeric array
  • NUMBER_OF_LINES - number of lines in open sequential file
  • GET_NEXT_CHAR - read character byte by byte
• SEQUENTIAL FILES
  • FILEOPEN - open a file
  • FILEREAD - read a file into a string array
  • FILEBYTE - read a file into a single-character array
  • FILEWRITE - write string array to a file
  • FILECLOSE - close a file
  • FILEDELETE - remove a file
• SCRATCH FILES
  • GET_TMP - get name for system scratch directory from environment variables
  • SCRATCH - get name of scratch file
  • UNIQ - add numeric suffix to filename if needed till filename does not exist
• SPLITTING AND JOINING PATHNAMES
  • DIRNAME - return the directory portion of a pathname
  • BASENAME - return the leaf portion of a pathname
  • SPLITPATH - split Unix pathname into directory, name, basename and extension
  • JOINPATH - join pathnames
• SYSTEM NAMES AND ATTRIBUTES
• SEPARATOR - try to determine pathname directory separator
• GETNAME - return a pathname to the current executable
• WHICH - return a pathname for a command name found with the environment variable
• LOOKFOR - return a pathname for a file basename found with the directories in the
• IS_HIDDEN_FILE - classify a pathname as a hidden file pathname or not
• MISCELLANEOUS
  • NOTOPEN - find unused FUN/LUN file-unit-number
  • FILENAME_GENERATOR - create filename containing a whole number
  • PRINT_INQUIRE - run INQUIRE(3f) on a file by name or number and print results
  • GET_ENV - function to get environment variable