mirror of https://github.com/trapexit/mergerfs.git
76 lines
1.6 KiB
C++
76 lines
1.6 KiB
C++
/*
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ISC License
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Copyright (c) 2023, 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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#pragma once
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#include "fs_mktemp.hpp"
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#include "fs_statvfs.hpp"
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#include "fs_unlink.hpp"
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#include "statvfs_util.hpp"
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#include "ugid.hpp"
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#include <string>
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namespace fs
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{
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static
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inline
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bool
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is_mounted_rofs(const std::string path_)
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{
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int rv;
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struct statvfs st;
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rv = fs::statvfs(path_,&st);
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return ((rv == 0) ? StatVFS::readonly(st) : false);
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}
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static
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inline
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bool
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is_rofs(std::string path_)
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{
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ugid::SetRootGuard const ugid;
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int fd;
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std::string tmp_filepath;
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std::tie(fd,tmp_filepath) = fs::mktemp_in_dir(path_,O_WRONLY);
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if(fd < 0)
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return (fd == -EROFS);
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fs::close(fd);
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fs::unlink(tmp_filepath);
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return false;
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}
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static
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inline
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bool
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is_rofs_but_not_mounted_ro(const std::string path_)
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{
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if(fs::is_mounted_rofs(path_))
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return false;
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return fs::is_rofs(path_);
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}
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}
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