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Path: utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!rms@mit-prep
From: rms@mit-prep
Newsgroups: net.emacs
Subject: Some answers
Message-ID: <5456@mit-eddie.UUCP>
Date: Sun, 6-Oct-85 01:43:53 EDT
Article-I.D.: mit-eddi.5456
Posted: Sun Oct  6 01:43:53 1985
Date-Received: Mon, 7-Oct-85 02:49:28 EDT
Sender: daemon@mit-eddi.UUCP
Organization: MIT, Cambridge, MA
Lines: 167

From: Richard M. Stallman <rms@mit-prep>
1. You can set an option permanently only with the .emacs file.
Do  (setq OPTION VALUE)

2. You can save a keyboard macro with M-x append-kbd-macro.
It writes a Lisp expression to the end of the file.
You could use .emacs as the file.

However, this is a bad idea.  If something is important enough
to keep around permanently, it should be written in a language
that is comprehensible, such as Lisp.

3. There is no way to execute Emacs editing commands from a file.

4. Here is a program to convert a Gosmacs mail directory into
a Unix mail file that you can read into GNU Emacs's Rmail.
I cannot be sure it really works, since I have nothing to
test it on.  If it does not work, please send me the fixes.


/* Copyright (C) 1985 Free Software Foundation
This file is part of GNU Emacs.

GNU Emacs is distributed in the hope that it will be useful,
but without any warranty.  No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing.

Everyone is granted permission to copy, modify and redistribute
GNU Emacs, but only under the conditions described in the
document "GNU Emacs copying permission notice".   An exact copy
of the document is supposed to have been given to you along with
GNU Emacs so that you can know how you may redistribute it all.
It should be in a file named COPYING.  Among other things, the
copyright notice and this notice must be preserved on all copies.  */

/* cm:
 * Program to convert oldstyle goslings emacs mail directories into
 * gnu-rmail format.  Program expects a directory called Messages to
 * exist in your home directory, containing individual mail messages in
 * separate files in the standard gosling emacs mail reader format.
 *
 * Program takes one argument: an output file.  THis file will contain
 * all the messages in Messages directory, in berkeley mail format.
 * If no output file is mentioned, messages are put in ~/OMAIL.
 *
 * In order to get rmail to read the messages, the resulting file must
 * be mv'ed to ~/mbox, and then have rmail invoked on them.
 * 
 * Author: Larry Kolodney, 1985

 * RMS, 2 Sept 85: Removed fixed maximums on file name sizes.
 */


#include <stdio.h>


main (argc, argv)
     int argc;
     char *argv[];
{
  char *hd;
  char *md;
  char *mdd;
  char *mfile;
  char *cf;
  int cflen;
  FILE *mddf;
  FILE *mfilef;
  FILE *cff;
  char pre[10], post[100];
  char name[14];
  int c;

  hd = (char *) getenv ("HOME");

  md = (char *) malloc (strlen (hd) + 10);
  strcpy (md, hd);
  strcat (md, "/Messages");

  mdd = (char *) malloc (strlen (md) + 11);
  strcpy (mdd, md);
  strcat (mdd, "/Directory");

  cflen = 100;
  cf = (char *) malloc (cflen);

  mddf = fopen (mdd, "r");
  if (argc > 1)
    mfilef = fopen (argv[1], "w");
  else
    {
      mfile = (char *) malloc (strlen (hd) + 7);
      strcpy (mfile, hd);
      strcat (mfile, "/OMAIL");
      mfilef = fopen (mfile, "w");
    }
  skip_to_lf (mddf);
  while (fscanf (mddf, "%4c%14[0123456789]", pre, name) != EOF)
    {
      if (cflen < strlen (md) + strlen (name) + 2)
	{
	  cflen = strlen (md) + strlen (name) + 2;
	  cf = (char *) xrealloc (cf, cflen);
	}
      strcpy (cf, md);
      strcat (cf,"/");
      strcat (cf, name);
      cff = fopen (cf, "r");
      while ((c = getc(cff)) != EOF)
	putc (c, mfilef);
      putc ('\n', mfilef);
      skip_to_lf (mddf);
     fclose (cff);
    }
  fclose (mddf);
  fclose (mfilef);    
  return 0;
}

skip_to_lf (stream)
     FILE *stream;
{
  register int c;
  while ((c = getc(stream)) != '\n')
    ;
}

int
xmalloc (size)
     int size;
{
  int result = malloc (size);
  if (!result)
    fatal ("virtual memory exhausted", 0);
  return result;
}

int
xrealloc (ptr, size)
     char *ptr;
     int size;
{
  int result = realloc (ptr, size);
  if (!result)
    fatal ("virtual memory exhausted");
  return result;
}

/* Print error message and exit.  */

fatal (s1, s2)
     char *s1, *s2;
{
  error (s1, s2);
  exit (1);
}

error (s1, s2)
     char *s1, *s2;
{
  printf ("cm: ");
  printf (s1, s2);
  printf ("\n");
}