Function usage

src/stdbuf.c:83–131

}

void
usage (int status)
{
  if (status != EXIT_SUCCESS)
    emit_try_help ();
  else
    {
      printf (_("Usage: %s OPTION... COMMAND\n"), program_name);
      fputs (_("\
Run COMMAND, with modified buffering operations for its standard streams.\n\
"), stdout);

      emit_mandatory_arg_note ();

      oputs (_("\
  -i, --input=MODE   adjust standard input stream buffering\n\
"));
      oputs (_("\
  -o, --output=MODE  adjust standard output stream buffering\n\
"));
      oputs (_("\
  -e, --error=MODE   adjust standard error stream buffering\n\
"));
      oputs (HELP_OPTION_DESCRIPTION);
      oputs (VERSION_OPTION_DESCRIPTION);
      fputs (_("\n\
If MODE is 'L' the corresponding stream will be line buffered.\n\
This option is invalid with standard input.\n"), stdout);
      fputs (_("\n\
If MODE is '0' the corresponding stream will be unbuffered.\n\
"), stdout);
      fputs (_("\n\
Otherwise MODE is a number which may be followed by one of the following:\n\
KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G,T,P,E,Z,Y,R,Q.\n\
Binary prefixes can be used, too: KiB=K, MiB=M, and so on.\n\
In this case the corresponding stream will be fully buffered with the buffer\n\
size set to MODE bytes.\n\
"), stdout);
      fputs (_("\n\
NOTE: If COMMAND adjusts the buffering of its standard streams ('tee' does\n\
for example) then that will override corresponding changes by 'stdbuf'.\n\
Also some filters (like 'dd' and 'cat' etc.) don't use streams for I/O,\n\
and are thus unaffected by 'stdbuf' settings.\n\
"), stdout);
      emit_exec_status (PROGRAM_NAME);
      emit_ancillary_info (PROGRAM_NAME);
    }
  exit (status);
}

/* argv[0] can be anything really, but generally it contains
   the path to the executable or just a name if it was executed