788e3b31e1
The "pure" and "const" attributes are not so well-defined, and a recent clang version implements an optimization which pushes the definition's boundary beyond what I believed it was. clang now assumes that functions declared "pure" cannot throw exceptions, even if they lack the "noexcept" specification. When compiled with this new clang version, MPD will crash randomly if an exception happens to get thrown by such as "pure" function (https://github.com/MusicPlayerDaemon/MPD/issues/41). This commit removes all such misplaced "pure" and "const" attributes, closing #41.
140 lines
3.4 KiB
C++
140 lines
3.4 KiB
C++
/*
|
|
* Copyright 2003-2017 The Music Player Daemon Project
|
|
* http://www.musicpd.org
|
|
*
|
|
* 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.
|
|
*
|
|
* 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.
|
|
*
|
|
* You should have received a copy of the GNU General Public License along
|
|
* with this program; if not, write to the Free Software Foundation, Inc.,
|
|
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "Permission.hxx"
|
|
#include "config/Param.hxx"
|
|
#include "config/ConfigGlobal.hxx"
|
|
#include "config/ConfigOption.hxx"
|
|
#include "system/FatalError.hxx"
|
|
|
|
#include <algorithm>
|
|
#include <map>
|
|
#include <string>
|
|
|
|
#include <assert.h>
|
|
#include <string.h>
|
|
|
|
static constexpr char PERMISSION_PASSWORD_CHAR = '@';
|
|
static constexpr char PERMISSION_SEPARATOR = ',';
|
|
|
|
static constexpr struct {
|
|
const char *name;
|
|
unsigned value;
|
|
} permission_names[] = {
|
|
{ "read", PERMISSION_READ },
|
|
{ "add", PERMISSION_ADD },
|
|
{ "control", PERMISSION_CONTROL },
|
|
{ "admin", PERMISSION_ADMIN },
|
|
{ nullptr, 0 },
|
|
};
|
|
|
|
static std::map<std::string, unsigned> permission_passwords;
|
|
|
|
static unsigned permission_default;
|
|
|
|
static unsigned
|
|
ParsePermission(const char *p)
|
|
{
|
|
for (auto i = permission_names; i->name != nullptr; ++i)
|
|
if (strcmp(p, i->name) == 0)
|
|
return i->value;
|
|
|
|
FormatFatalError("unknown permission \"%s\"", p);
|
|
}
|
|
|
|
static unsigned parsePermissions(const char *string)
|
|
{
|
|
assert(string != nullptr);
|
|
|
|
const char *const end = string + strlen(string);
|
|
|
|
unsigned permission = 0;
|
|
while (true) {
|
|
const char *comma = std::find(string, end,
|
|
PERMISSION_SEPARATOR);
|
|
if (comma > string) {
|
|
const std::string name(string, comma);
|
|
permission |= ParsePermission(name.c_str());
|
|
}
|
|
|
|
if (comma == end)
|
|
break;
|
|
|
|
string = comma + 1;
|
|
}
|
|
|
|
return permission;
|
|
}
|
|
|
|
void initPermissions(void)
|
|
{
|
|
unsigned permission;
|
|
const ConfigParam *param;
|
|
|
|
permission_default = PERMISSION_READ | PERMISSION_ADD |
|
|
PERMISSION_CONTROL | PERMISSION_ADMIN;
|
|
|
|
param = config_get_param(ConfigOption::PASSWORD);
|
|
|
|
if (param) {
|
|
permission_default = 0;
|
|
|
|
do {
|
|
const char *separator =
|
|
strchr(param->value.c_str(),
|
|
PERMISSION_PASSWORD_CHAR);
|
|
|
|
if (separator == NULL)
|
|
FormatFatalError("\"%c\" not found in password string "
|
|
"\"%s\", line %i",
|
|
PERMISSION_PASSWORD_CHAR,
|
|
param->value.c_str(),
|
|
param->line);
|
|
|
|
std::string password(param->value.c_str(), separator);
|
|
|
|
permission = parsePermissions(separator + 1);
|
|
|
|
permission_passwords.insert(std::make_pair(std::move(password),
|
|
permission));
|
|
} while ((param = param->next) != nullptr);
|
|
}
|
|
|
|
param = config_get_param(ConfigOption::DEFAULT_PERMS);
|
|
|
|
if (param)
|
|
permission_default = parsePermissions(param->value.c_str());
|
|
}
|
|
|
|
int getPermissionFromPassword(char const* password, unsigned* permission)
|
|
{
|
|
auto i = permission_passwords.find(password);
|
|
if (i == permission_passwords.end())
|
|
return -1;
|
|
|
|
*permission = i->second;
|
|
return 0;
|
|
}
|
|
|
|
unsigned getDefaultPermissions(void)
|
|
{
|
|
return permission_default;
|
|
}
|