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