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/* mcron.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 <argp.h>
#include <libguile.h>
/* Forward declarations. */
static void inner_main (void *closure, int argc, char *argv[]);
static SCM parse_args (int argc, char *argv[]);
static error_t parse_opt (int key, char *arg, struct argp_state *state);
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 config = parse_args (argc, argv);
scm_set_current_module (scm_c_resolve_module ("mcron scripts mcron"));
scm_call_1 (scm_variable_ref (scm_c_lookup ("main")), config);
}
/* Handle command line arguments. */
static SCM
parse_args (int argc, char *argv[])
{
static struct argp_option options[] = {
{"schedule", 's', "N", 0,
"Display the next N jobs that will be run"},
{"daemon", 'd', 0, 0,
"Run as a daemon process"},
{"stdin", 'i', "FORMAT", 0,
"Format of data passed as standard input or file arguments (default guile)"},
{0, 0, 0, 0, 0}
};
static struct argp argp = {
.options = options,
.parser = parse_opt,
.args_doc = "[FILE...]",
.doc = "Run an mcron process according to the specifications in the "
"FILE... (`-' for standard input), or use all the files in "
"~/.config/cron (or the deprecated ~/.cron) with .guile or "
".vixie extensions."
};
SCM config = SCM_EOL;
argp_program_version = PACKAGE_STRING;
argp_program_bug_address = PACKAGE_BUGREPORT;
argp_parse (&argp, argc, argv, 0, NULL, &config);
return config;
}
static error_t
parse_opt (int key, char *arg, struct argp_state *state)
{
SCM *config = state->input;
switch (key)
{
case 's':
*config = scm_assq_set_x (*config, scm_from_utf8_symbol ("schedule"),
scm_from_int (atoi (arg)));
break;
case 'd':
*config = scm_assq_set_x (*config, scm_from_utf8_symbol ("daemon"),
SCM_BOOL_T);
break;
case 'i':
if (strncmp (arg, "vixie", 6) == 0)
*config = scm_assq_set_x (*config, scm_from_utf8_symbol ("vixie"),
SCM_BOOL_T);
break;
case ARGP_KEY_NO_ARGS:
*config = scm_assq_set_x (*config, scm_from_utf8_symbol ("files"),
SCM_EOL);
break;
case ARGP_KEY_ARGS:
{
SCM lst = SCM_EOL;
int filec = state->argc - state->next;
char **filev = state->argv + state->next;
for (int i = filec - 1; i >= 0; i--)
lst = scm_cons (scm_from_locale_string (filev[i]), lst);
*config = scm_assq_set_x (*config, scm_from_utf8_symbol ("files"),
lst);
break;
}
case ARGP_KEY_ARG:
default:
return ARGP_ERR_UNKNOWN;
}
return 0;
}
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