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74 lines
1.9 KiB
74 lines
1.9 KiB
/*
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ISC License
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Copyright (c) 2026, 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_open.hpp"
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#include "ugid.hpp"
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// Linux can set ugid because it allows for credentials per
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// thread. FreeBSD however does not and must create as root then
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// chown. Another option for both platforms would be to create a temp
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// file, chown, then rename to target. Unfortunately, depending on if
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// the target filesystem is POSIX compliant or uses POSIX / extended
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// ACLs it is not possible to know what is best.
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#if defined __linux__
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namespace fs
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{
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static
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inline
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int
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open_as(const ugid_t ugid_,
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const fs::path &path_,
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const int flags_,
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const mode_t mode_)
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{
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const ugid::SetGuard _(ugid_);
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return fs::open(path_,flags_,mode_);
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}
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}
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#elif defined __FreeBSD__
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#include "fs_fchown.hpp"
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namespace fs
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{
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static
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inline
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int
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open_as(const ugid_t ugid_,
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const fs::path &path_,
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const int flags_,
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const mode_t mode_)
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{
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int rv;
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rv = fs::open(path_,flags_,mode_);
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if(rv < 0)
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return rv;
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fs::fchown(rv,ugid_.uid,ugid_.gid);
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return rv;
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}
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}
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#else
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#error "Not Supported!"
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#endif
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