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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.
56 lines
1.1 KiB
C++
56 lines
1.1 KiB
C++
#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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