mirror of
https://github.com/trapexit/mergerfs.git
synced 2024-11-29 12:03:59 +08:00
138 lines
3.3 KiB
C++
138 lines
3.3 KiB
C++
/*
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Copyright (c) 2016, Antonio SJ Musumeci <trapexit@spawn.link>
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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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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "config.hpp"
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#include "errno.hpp"
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#include "fs_lchown.hpp"
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#include "fs_path.hpp"
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#include "policy_rv.hpp"
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#include "ugid.hpp"
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#include "fuse.h"
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#include <string>
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#include <vector>
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using std::string;
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using std::vector;
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namespace l
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{
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static
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int
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get_error(const PolicyRV &prv_,
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const string &basepath_)
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{
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for(int i = 0, ei = prv_.success.size(); i < ei; i++)
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{
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if(prv_.success[i].basepath == basepath_)
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return prv_.success[i].rv;
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}
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for(int i = 0, ei = prv_.error.size(); i < ei; i++)
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{
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if(prv_.error[i].basepath == basepath_)
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return prv_.error[i].rv;
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}
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return 0;
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}
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static
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void
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chown_loop_core(const string &basepath_,
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const char *fusepath_,
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const uid_t uid_,
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const gid_t gid_,
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PolicyRV *prv_)
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{
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string fullpath;
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fullpath = fs::path::make(basepath_,fusepath_);
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errno = 0;
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fs::lchown(fullpath,uid_,gid_);
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prv_->insert(errno,basepath_);
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}
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static
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void
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chown_loop(const vector<string> &basepaths_,
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const char *fusepath_,
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const uid_t uid_,
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const gid_t gid_,
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PolicyRV *prv_)
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{
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for(size_t i = 0, ei = basepaths_.size(); i != ei; i++)
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{
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l::chown_loop_core(basepaths_[i],fusepath_,uid_,gid_,prv_);
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}
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}
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static
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int
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chown(const Policy::Action &actionFunc_,
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const Policy::Search &searchFunc_,
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const Branches &branches_,
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const char *fusepath_,
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const uid_t uid_,
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const gid_t gid_)
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{
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int rv;
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PolicyRV prv;
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vector<string> basepaths;
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rv = actionFunc_(branches_,fusepath_,&basepaths);
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if(rv == -1)
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return -errno;
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l::chown_loop(basepaths,fusepath_,uid_,gid_,&prv);
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if(prv.error.empty())
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return 0;
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if(prv.success.empty())
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return prv.error[0].rv;
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basepaths.clear();
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rv = searchFunc_(branches_,fusepath_,&basepaths);
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if(rv == -1)
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return -errno;
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return l::get_error(prv,basepaths[0]);
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}
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}
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namespace FUSE
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{
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int
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chown(const char *fusepath_,
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uid_t uid_,
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gid_t gid_)
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{
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Config::Read cfg;
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const fuse_context *fc = fuse_get_context();
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const ugid::Set ugid(fc->uid,fc->gid);
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return l::chown(cfg->func.chown.policy,
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cfg->func.getattr.policy,
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cfg->branches,
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fusepath_,
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uid_,
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gid_);
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}
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}
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