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/*
* Copyright (C) 2009 Martin Willi
* Hochschule fuer Technik Rapperswil
*
* This program 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 2 of the License, or (at your
* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
*
* This program 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.
*/
#include "command.h"
#include "pki.h"
#define _GNU_SOURCE
#include <getopt.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <library.h>
#include <utils/debug.h>
#include <utils/optionsfrom.h>
/**
* Registered commands.
*/
command_t cmds[MAX_COMMANDS];
/**
* active command.
*/
static int active = 0;
/**
* number of registered commands
*/
static int registered = 0;
/**
* help command index
*/
static int help_idx;
static int argc;
static char **argv;
static options_t *options;
/**
* Global options used by all subcommands
*/
static struct option command_opts[MAX_COMMANDS > MAX_OPTIONS ?: MAX_OPTIONS];
/**
* Global optstring used by all subcommands
*/
static char command_optstring[(MAX_COMMANDS > MAX_OPTIONS ?: MAX_OPTIONS) * 3];
/**
* Build command_opts/command_optstr for the active command
*/
static void build_opts()
{
int i, pos = 0;
memset(command_opts, 0, sizeof(command_opts));
memset(command_optstring, 0, sizeof(command_optstring));
if (active == help_idx)
{
for (i = 0; cmds[i].cmd; i++)
{
command_opts[i].name = cmds[i].cmd;
command_opts[i].val = cmds[i].op;
command_optstring[i] = cmds[i].op;
}
}
else
{
for (i = 0; cmds[active].options[i].name; i++)
{
command_opts[i].name = cmds[active].options[i].name;
command_opts[i].has_arg = cmds[active].options[i].arg;
command_opts[i].val = cmds[active].options[i].op;
command_optstring[pos++] = cmds[active].options[i].op;
switch (cmds[active].options[i].arg)
{
case optional_argument:
command_optstring[pos++] = ':';
/* FALL */
case required_argument:
command_optstring[pos++] = ':';
/* FALL */
case no_argument:
default:
break;
}
}
}
}
/**
* getopt_long wrapper
*/
int command_getopt(char **arg)
{
int op;
while (TRUE)
{
op = getopt_long(argc, argv, command_optstring, command_opts, NULL);
switch (op)
{
case '+':
if (!options->from(options, optarg, &argc, &argv, optind))
{
/* a error value */
return 255;
}
continue;
case 'v':
dbg_default_set_level(atoi(optarg));
continue;
default:
*arg = optarg;
return op;
}
}
}
/**
* Register a command
*/
void command_register(command_t command)
{
int i;
cmds[registered] = command;
/* append default options, but not to --help */
if (!active)
{
for (i = 0; i < countof(cmds[registered].options) - 1; i++)
{
if (cmds[registered].options[i].name)
{
continue;
}
cmds[registered].options[i++] = (command_option_t) {
"debug", 'v', 1, "set debug level, default: 1"
};
cmds[registered].options[i++] = (command_option_t) {
"options", '+', 1, "read command line options from file"
};
break;
}
}
registered++;
}
/**
* Print usage text, with an optional error
*/
int command_usage(char *error)
{
FILE *out = stdout;
int i;
if (error)
{
out = stderr;
fprintf(out, "Error: %s\n", error);
}
fprintf(out, "strongSwan %s PKI tool\n", VERSION);
if (active == help_idx)
{
fprintf(out, "loaded plugins: %s\n",
lib->plugins->loaded_plugins(lib->plugins));
}
fprintf(out, "usage:\n");
if (active == help_idx)
{
for (i = 0; cmds[i].cmd; i++)
{
fprintf(out, " pki --%-7s (-%c) %s\n",
cmds[i].cmd, cmds[i].op, cmds[i].description);
}
}
else
{
for (i = 0; cmds[active].line[i]; i++)
{
if (i == 0)
{
fprintf(out, " pki --%s %s\n",
cmds[active].cmd, cmds[active].line[i]);
}
else
{
fprintf(out, " %s\n", cmds[active].line[i]);
}
}
for (i = 0; cmds[active].options[i].name; i++)
{
fprintf(out, " --%-15s (-%c) %s\n",
cmds[active].options[i].name, cmds[active].options[i].op,
cmds[active].options[i].desc);
}
}
return error != NULL;
}
/**
* Show usage information
*/
static int help(int argc, char *argv[])
{
return command_usage(NULL);
}
/**
* Dispatch cleanup hook
*/
static void cleanup()
{
options->destroy(options);
}
/**
* Dispatch commands.
*/
int command_dispatch(int c, char *v[])
{
int op, i;
options = options_create();
atexit(cleanup);
active = help_idx = registered;
argc = c;
argv = v;
command_register((command_t){help, 'h', "help", "show usage information"});
build_opts();
op = getopt_long(c, v, command_optstring, command_opts, NULL);
for (i = 0; cmds[i].cmd; i++)
{
if (cmds[i].op == op)
{
active = i;
build_opts();
return cmds[i].call();
}
}
return command_usage(c > 1 ? "invalid operation" : NULL);
}
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