project: banish need for C compiler

This patch gets rid of the thin veneer that we currently have around the three
executables.  This was done for historical reasons (circa 2003 Guile couldnʼt
deal with process signals and forks).  In fact these problems were fixed many
moons ago, and there is now no need for it.  The project becomes 100% Guile!

Many files are affected; interested coders should use the GIT repository to
understand the details of all the changes.

1 files changed, 0 insertions, 80 deletions

diff --git a/src/cron.c b/src/cron.c
deleted file mode 100644
index 074f882..0000000
--- a/src/cron.c
+++ /dev/null
@@ -1,80 +0,0 @@
-/* cron.c -- run jobs at scheduled times
-   Copyright © 2003, 2014 Dale Mellor <dale_mellor@users.sourceforge.net>
-   Copyright © 2015, 2016, 2017 Mathieu Lirzin <mthl@gnu.org>
-
-   This file is part of GNU Mcron.
-
-   GNU Mcron is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   GNU Mcron is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with GNU Mcron.  If not, see <http://www.gnu.org/licenses/>.  */
-
-#include "utils.h"
-#include <signal.h>
-#include <string.h>
-
-/* Forward declarations.  */
-static void inner_main (void *closure, int argc, char *argv[]);
-static void react_to_terminal_signal (int sig);
-static SCM set_cron_signals (void);
-
-int
-main (int argc, char *argv[])
-{
-  /* Set Guile load paths to ensure that Mcron modules will be found after
-     installation.  In a build environment let the 'pre-inst-env' script set
-     the correct paths.  */
-  if (getenv ("MCRON_UNINSTALLED") == NULL)
-    {
-      wrap_env_path ("GUILE_LOAD_PATH", PACKAGE_LOAD_PATH);
-      wrap_env_path ("GUILE_LOAD_COMPILED_PATH", PACKAGE_LOAD_COMPILED_PATH);
-    }
-
-  scm_boot_guile (argc, argv, inner_main, NULL);
-
-  return EXIT_SUCCESS;
-}
-
-/* Launch the Mcron Guile main program.  */
-static void
-inner_main (void *closure, int argc, char *argv[])
-{
-  scm_set_current_module (scm_c_resolve_module ("mcron scripts cron"));
-  scm_c_define_gsubr ("c-set-cron-signals", 0, 0, 0, set_cron_signals);
-  scm_call_0 (scm_variable_ref (scm_c_lookup ("main")));
-}
-
-/* Set up all the signal handlers.  This is necessary to perform the signal
-   processing in C because the sigaction function won't work when called from
-   Guile.  */
-static SCM
-set_cron_signals ()
-{
-  static struct sigaction sa;
-
-  memset (&sa, 0, sizeof (sa));
-  sa.sa_handler = react_to_terminal_signal;
-  sigaction (SIGTERM, &sa, 0);
-  sigaction (SIGINT,  &sa, 0);
-  sigaction (SIGQUIT, &sa, 0);
-  sigaction (SIGHUP,  &sa, 0);
-
-  return SCM_BOOL_T;
-}
-
-/* Handle signal SIG and exit.  All signals that cron handles will produce the
-   same behavior so we don't need to use SIG in the implementation.  */
-static void
-react_to_terminal_signal (int sig)
-{
-  scm_c_eval_string ("(delete-run-file)");
-  exit (EXIT_FAILURE);
-}