ifupdown-ng/cmd/multicall.c
2020-08-11 22:37:10 -06:00

107 lines
2.2 KiB
C

/*
* cmd/multicall.c
* Purpose: multi-call binary frontend
*
* Copyright (c) 2020 Ariadne Conill <ariadne@dereferenced.org>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#define _GNU_SOURCE
#include <libgen.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include "cmd/multicall.h"
char *argv0;
extern struct if_applet ifquery_applet;
extern struct if_applet ifup_applet;
extern struct if_applet ifdown_applet;
struct if_applet ifupdown_applet;
const struct if_applet *self_applet = NULL;
struct if_applet *applet_table[] = {
&ifdown_applet,
&ifquery_applet,
&ifup_applet,
&ifupdown_applet,
};
int
applet_cmp(const void *a, const void *b)
{
const char *key = a;
const struct if_applet *applet = *(void **)b;
return strcmp(key, applet->name);
}
void multicall_usage(int status) __attribute__((noreturn));
int
main(int argc, char *argv[])
{
argv0 = basename(argv[0]);
const struct if_applet **app;
app = bsearch(argv0, applet_table,
ARRAY_SIZE(applet_table), sizeof(*applet_table),
applet_cmp);
if (app == NULL)
{
fprintf(stderr, "%s: applet not found\n", argv0);
multicall_usage(EXIT_FAILURE);
}
self_applet = *app;
process_options(*app, argc, argv);
return (*app)->main(argc, argv);
}
int
multicall_main(int argc, char *argv[])
{
if (argc < 2)
multicall_usage(EXIT_FAILURE);
return main(argc - 1, argv + 1);
}
struct if_applet ifupdown_applet;
void
multicall_usage(int status)
{
fprintf(stderr, "usage: ifupdown <applet> [options]\n");
fprintf(stderr, "\nBuilt-in applets:\n\t");
for (size_t i = 0; i < ARRAY_SIZE(applet_table); i++)
{
if (i != 0)
fprintf(stderr, ", ");
fprintf(stderr, "%s", applet_table[i]->name);
}
fprintf(stderr, "\n");
exit(status);
}
struct if_applet ifupdown_applet = {
.name = "ifupdown",
.main = multicall_main,
.usage = multicall_usage,
.groups = { &global_option_group, NULL }
};