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https://github.com/scottlamb/moonfire-nvr.git
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e52e725958
This is nicer in a few ways:
* I can use openat so there's no possibility of any kind of a race
involving scanning a different directory than the one used in
other ways (locking, metadata file, adding/removing sample files)
* filename() doesn't need to allocate memory, so it's a bit more
efficient
* dogfooding - I wrote nix::dir.
41 lines
1.9 KiB
Rust
41 lines
1.9 KiB
Rust
// This file is part of Moonfire NVR, a security camera network video recorder.
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// Copyright (C) 2019 Scott Lamb <slamb@slamb.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// In addition, as a special exception, the copyright holders give
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// permission to link the code of portions of this program with the
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// OpenSSL library under certain conditions as described in each
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// individual source file, and distribute linked combinations including
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// the two.
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//
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// You must obey the GNU General Public License in all respects for all
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// of the code used other than OpenSSL. If you modify file(s) with this
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// exception, you may extend this exception to your version of the
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// file(s), but you are not obligated to do so. If you do not wish to do
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// so, delete this exception statement from your version. If you delete
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// this exception statement from all source files in the program, then
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// also delete it here.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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use std::os::unix::io::{FromRawFd, RawFd};
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use nix::NixPath;
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use nix::fcntl::OFlag;
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use nix::sys::stat::Mode;
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pub fn openat<P: ?Sized + NixPath>(dirfd: RawFd, path: &P, oflag: OFlag, mode: Mode)
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-> Result<std::fs::File, nix::Error> {
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let fd = nix::fcntl::openat(dirfd, path, oflag, mode)?;
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Ok(unsafe { std::fs::File::from_raw_fd(fd) })
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}
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