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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 <stdlib.h>
#include <string.h>
#include <stdio.h>
/**
* Registered commands.
*/
command_t cmds[CMD_MAX];
/**
* Global options used by all subcommands
*/
struct option command_opts[CMD_MAX > MAX_OPTIONS ?: MAX_OPTIONS];
/**
* Build long_opts for a specific command
*/
static void build_opts(command_type_t cmd)
{
int i;
memset(command_opts, 0, sizeof(command_opts));
if (cmd == CMD_HELP)
{
for (i = 0; i < CMD_MAX; i++)
{
command_opts[i].name = cmds[i].cmd;
command_opts[i].val = cmds[i].op;
}
}
else
{
for (i = 0; cmds[cmd].options[i].name; i++)
{
command_opts[i].name = cmds[cmd].options[i].name;
command_opts[i].has_arg = cmds[cmd].options[i].arg;
command_opts[i].val = cmds[cmd].options[i].op;
}
}
}
/**
* Register a command
*/
void command_register(command_type_t type, command_t command)
{
cmds[type] = command;
}
/**
* Print usage text, with an optional error
*/
int command_usage(command_type_t cmd, 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);
fprintf(out, "usage:\n");
if (cmd == CMD_HELP)
{
for (i = 0; i < CMD_MAX; i++)
{
fprintf(out, " pki --%-6s %s\n", cmds[i].cmd, cmds[i].description);
}
}
else
{
for (i = 0; cmds[cmd].line[i]; i++)
{
if (i == 0)
{
fprintf(out, " pki --%s %s\n", cmds[cmd].cmd, cmds[cmd].line[i]);
}
else
{
fprintf(out, " %s\n", cmds[cmd].line[i]);
}
}
for (i = 0; cmds[cmd].options[i].name; i++)
{
fprintf(out, " --%-8s %s\n",
cmds[cmd].options[i].name, cmds[cmd].options[i].desc);
}
}
return error != NULL;
}
/**
* Show usage information
*/
static int help(int argc, char *argv[])
{
return command_usage(CMD_HELP, NULL);
}
/**
* Dispatch commands.
*/
int command_dispatch(int argc, char *argv[])
{
int op, i;
command_register(CMD_HELP, (command_t) {
help, 'h', "help", "show usage information"});
build_opts(CMD_HELP);
op = getopt_long(argc, argv, "", command_opts, NULL);
for (i = 0; i < CMD_MAX; i++)
{
if (cmds[i].op == op)
{
build_opts(i);
return cmds[i].call(argc, argv);
}
}
return command_usage(CMD_HELP, "invalid operation");
}
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