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149 lines
4.0 KiB
149 lines
4.0 KiB
/*
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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_acl.hpp"
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#include "fs_base_mknod.hpp"
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#include "fs_clonepath.hpp"
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#include "fs_path.hpp"
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#include "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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inline
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int
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mknod_core(const string &fullpath_,
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mode_t mode_,
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const mode_t umask_,
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const dev_t dev_)
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{
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if(!fs::acl::dir_has_defaults(fullpath_))
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mode_ &= ~umask_;
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return fs::mknod(fullpath_,mode_,dev_);
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}
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static
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int
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mknod_loop_core(const string &createpath_,
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const char *fusepath_,
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const mode_t mode_,
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const mode_t umask_,
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const dev_t dev_,
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const int error_)
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{
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int rv;
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string fullpath;
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fullpath = fs::path::make(&createpath_,fusepath_);
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rv = l::mknod_core(fullpath,mode_,umask_,dev_);
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return error::calc(rv,error_,errno);
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}
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static
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int
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mknod_loop(const string &existingpath_,
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const vector<string> &createpaths_,
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const char *fusepath_,
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const string &fusedirpath_,
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const mode_t mode_,
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const mode_t umask_,
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const dev_t dev_)
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{
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int rv;
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int error;
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error = -1;
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for(size_t i = 0, ei = createpaths_.size(); i != ei; i++)
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{
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rv = fs::clonepath_as_root(existingpath_,createpaths_[i],fusedirpath_);
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if(rv == -1)
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error = error::calc(rv,error,errno);
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else
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error = l::mknod_loop_core(createpaths_[i],
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fusepath_,
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mode_,umask_,dev_,error);
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}
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return -error;
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}
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static
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int
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mknod(Policy::Func::Search searchFunc_,
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Policy::Func::Create createFunc_,
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const Branches &branches_,
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const uint64_t minfreespace_,
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const char *fusepath_,
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const mode_t mode_,
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const mode_t umask_,
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const dev_t dev_)
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{
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int rv;
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string fusedirpath;
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vector<string> createpaths;
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vector<string> existingpaths;
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fusedirpath = fs::path::dirname(fusepath_);
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rv = searchFunc_(branches_,fusedirpath,minfreespace_,&existingpaths);
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if(rv == -1)
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return -errno;
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rv = createFunc_(branches_,fusedirpath,minfreespace_,&createpaths);
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if(rv == -1)
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return -errno;
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return l::mknod_loop(existingpaths[0],createpaths,
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fusepath_,fusedirpath,
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mode_,umask_,dev_);
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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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mknod(const char *fusepath_,
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mode_t mode_,
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dev_t rdev_)
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{
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const fuse_context *fc = fuse_get_context();
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const Config &config = Config::ro();
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const ugid::Set ugid(fc->uid,fc->gid);
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return l::mknod(config.func.getattr.policy,
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config.func.mknod.policy,
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config.branches,
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config.minfreespace,
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fusepath_,
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mode_,
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fc->umask,
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rdev_);
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}
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}
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