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/*
Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
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.
THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include "config.hpp"
#include "errno.hpp"
#include "fs_lchown.hpp"
#include "fs_path.hpp"
#include "policy_rv.hpp"
#include "ugid.hpp"
#include "fuse.h"
#include <string>
#include <vector>
using std::string;
using std::vector;
namespace l
{
static
int
get_error(const PolicyRV &prv_,
const string &basepath_)
{
for(int i = 0, ei = prv_.success.size(); i < ei; i++)
{
if(prv_.success[i].basepath == basepath_)
return prv_.success[i].rv;
}
for(int i = 0, ei = prv_.error.size(); i < ei; i++)
{
if(prv_.error[i].basepath == basepath_)
return prv_.error[i].rv;
}
return 0;
}
static
void
chown_loop_core(const string &basepath_,
const char *fusepath_,
const uid_t uid_,
const gid_t gid_,
PolicyRV *prv_)
{
string fullpath;
fullpath = fs::path::make(basepath_,fusepath_);
errno = 0;
fs::lchown(fullpath,uid_,gid_);
prv_->insert(errno,basepath_);
}
static
void
chown_loop(const vector<string> &basepaths_,
const char *fusepath_,
const uid_t uid_,
const gid_t gid_,
PolicyRV *prv_)
{
for(size_t i = 0, ei = basepaths_.size(); i != ei; i++)
{
l::chown_loop_core(basepaths_[i],fusepath_,uid_,gid_,prv_);
}
}
static
int
chown(const Policy::Action &actionFunc_,
const Policy::Search &searchFunc_,
const Branches &branches_,
const char *fusepath_,
const uid_t uid_,
const gid_t gid_)
{
int rv;
PolicyRV prv;
vector<string> basepaths;
rv = actionFunc_(branches_,fusepath_,&basepaths);
if(rv == -1)
return -errno;
l::chown_loop(basepaths,fusepath_,uid_,gid_,&prv);
if(prv.error.empty())
return 0;
if(prv.success.empty())
return prv.error[0].rv;
basepaths.clear();
rv = searchFunc_(branches_,fusepath_,&basepaths);
if(rv == -1)
return -errno;
return l::get_error(prv,basepaths[0]);
}
}
namespace FUSE
{
int
chown(const char *fusepath_,
uid_t uid_,
gid_t gid_)
{
Config::Read cfg;
const fuse_context *fc = fuse_get_context();
const ugid::Set ugid(fc->uid,fc->gid);
return l::chown(cfg->func.chown.policy,
cfg->func.getattr.policy,
cfg->branches,
fusepath_,
uid_,
gid_);
}
}