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Run in an elevated credential mode (root) and let the kernel manage entitlements. Will result in slightly different behavior but should not be noticed by most.
110 lines
2.8 KiB
C++
110 lines
2.8 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 "fuse_chown.hpp"
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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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static
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void
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_chown_loop_core(const fs::path &basepath_,
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const fs::path &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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fs::path fullpath;
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fullpath = 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 std::vector<Branch*> &branches_,
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const fs::path &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(const auto &branch : branches_)
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{
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::_chown_loop_core(branch->path,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 fs::path &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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std::vector<Branch*> branches;
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rv = actionFunc_(branches_,fusepath_,branches);
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if(rv < 0)
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return rv;
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::_chown_loop(branches,fusepath_,uid_,gid_,&prv);
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if(prv.errors.empty())
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return 0;
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if(prv.successes.empty())
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return prv.errors[0].rv;
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branches.clear();
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rv = searchFunc_(branches_,fusepath_,branches);
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if(rv < 0)
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return rv;
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return prv.get_error(branches[0]->path);
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}
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int
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FUSE::chown(const fuse_req_ctx_t *ctx_,
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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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const fs::path fusepath{fusepath_};
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return ::_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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