mirror of
https://github.com/matrix-construct/construct
synced 2024-09-05 00:05:59 +02:00
982 lines
16 KiB
C++
982 lines
16 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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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 is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <boost/filesystem.hpp>
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#include <ircd/asio.h>
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#ifdef IRCD_USE_AIO
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#include "aio.h"
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#endif
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namespace filesystem = boost::filesystem;
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namespace ircd::fs
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{
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filesystem::path path(std::string);
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filesystem::path path(const string_view &);
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filesystem::path path(const vector_view<const string_view> &);
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}
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/// Non-null when aio is available for use
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decltype(ircd::fs::aioctx)
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ircd::fs::aioctx
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{};
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ircd::fs::init::init()
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{
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#ifdef IRCD_USE_AIO
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assert(!aioctx);
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aioctx = new aio{};
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#else
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log::warning
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{
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"No support for asynchronous local filesystem IO..."
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};
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#endif
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}
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ircd::fs::init::~init()
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noexcept
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{
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#ifdef IRCD_USE_AIO
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delete aioctx;
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aioctx = nullptr;
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#endif
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assert(!aioctx);
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}
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//
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// Compile-time path index
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//
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namespace ircd::fs
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{
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struct sysent;
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extern const std::array<struct sysent, num_of<index>()> syspaths;
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}
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struct ircd::fs::sysent
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{
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string_view name;
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string_view path;
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};
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decltype(ircd::fs::syspaths)
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ircd::fs::syspaths
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{{
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{ "installation prefix", RB_PREFIX },
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{ "binary directory", RB_BIN_DIR },
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{ "configuration directory", RB_CONF_DIR },
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{ "data directory", RB_DATA_DIR },
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{ "database directory", RB_DB_DIR },
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{ "log directory", RB_LOG_DIR },
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{ "module directory", RB_MODULE_DIR },
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}};
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ircd::string_view
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ircd::fs::get(index index)
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noexcept try
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{
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return syspaths.at(index).path;
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}
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catch(const std::out_of_range &e)
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{
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return {};
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}
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ircd::string_view
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ircd::fs::name(index index)
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noexcept try
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{
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return syspaths.at(index).name;
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}
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catch(const std::out_of_range &e)
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{
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return {};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/stdin.h
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//
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ircd::string_view
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ircd::fs::stdin::readline(const mutable_buffer &buf)
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{
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assert(ircd::ios);
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boost::asio::posix::stream_descriptor fd
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{
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*ircd::ios, dup(STDIN_FILENO)
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};
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boost::asio::streambuf sb
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{
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size(buf)
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};
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const auto interruption{[&fd]
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(ctx::ctx *const &interruptor) noexcept
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{
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fd.cancel();
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}};
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const size_t len
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{
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boost::asio::async_read_until(fd, sb, '\n', yield_context{to_asio{interruption}})
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};
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std::istream is{&sb};
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is.get(data(buf), size(buf), '\n');
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return string_view
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{
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data(buf), size_t(is.gcount())
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};
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}
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//
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// tty
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//
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ircd::fs::stdin::tty::tty()
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:fd{[]
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{
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thread_local char buf[256];
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syscall(::ttyname_r, STDIN_FILENO, buf, sizeof(buf));
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return fd
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{
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string_view{buf}, std::ios_base::out
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};
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}()}
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{
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}
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size_t
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ircd::fs::stdin::tty::write(const string_view &buf)
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{
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return syscall(::write, int(*this), buf.data(), buf.size());
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/fsync.h
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//
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ircd::fs::fsync_opts
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const ircd::fs::fsync_opts_default
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{};
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void
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ircd::fs::fsync(const fd &fd,
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const fsync_opts &opts)
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try
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{
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//TODO: AIO fsync is throwing -EINVAL
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/*
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#ifdef IRCD_USE_AIO
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if(likely(aioctx))
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return fsync__aio(fd, opts);
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#endif
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*/
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syscall(::fsync, fd);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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void
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ircd::fs::fdsync(const fd &fd,
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const fsync_opts &opts)
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try
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{
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//TODO: AIO fdsync is throwing -EINVAL
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/*
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#ifdef IRCD_USE_AIO
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if(likely(aioctx))
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return fdsync__aio(fd, opts);
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#endif
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*/
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syscall(::fdatasync, fd);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/prefetch.h
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//
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/read.h
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//
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ircd::fs::read_opts
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const ircd::fs::read_opts_default
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{};
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#ifdef __linux__
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void
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ircd::fs::prefetch(const fd &fd,
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const size_t &count,
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const read_opts &opts)
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{
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const auto flags
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{
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syscall(::fcntl, fd, F_GETFL)
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};
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if(~flags & O_DIRECT)
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{
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syscall(::readahead, fd, opts.offset, count);
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return;
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}
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#ifdef IRCD_USE_AIO
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if(likely(aioctx))
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prefetch__aio(fd, count, opts);
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#endif
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}
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#else
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void
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ircd::fs::prefetch(const fd &fd,
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const size_t &count,
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const read_opts &opts)
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{
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}
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#endif
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std::string
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ircd::fs::read(const string_view &path,
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const read_opts &opts)
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try
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{
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const fd fd
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{
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path
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};
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return read(fd, opts);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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std::string
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ircd::fs::read(const fd &fd,
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const read_opts &opts)
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{
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return string(size(fd), [&fd, &opts]
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(const mutable_buffer &buf)
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{
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return read(fd, buf, opts);
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});
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}
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ircd::const_buffer
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ircd::fs::read(const string_view &path,
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const mutable_buffer &buf,
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const read_opts &opts)
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try
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{
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const fd fd
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{
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path
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};
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return read(fd, buf, opts);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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ircd::const_buffer
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ircd::fs::read(const fd &fd,
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const mutable_buffer &buf,
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const read_opts &opts)
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try
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{
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#ifdef IRCD_USE_AIO
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if(likely(aioctx))
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return read__aio(fd, buf, opts);
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#endif
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return
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{
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data(buf),
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size_t(syscall(::pread, fd, data(buf), size(buf), opts.offset))
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};
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/write.h
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//
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ircd::fs::write_opts
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const ircd::fs::write_opts_default
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{};
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void
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ircd::fs::allocate(const fd &fd,
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const size_t &size,
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const write_opts &opts)
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{
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int mode{0};
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mode |= opts.keep_size? FALLOC_FL_KEEP_SIZE : 0;
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syscall(::fallocate, fd, mode, opts.offset, size);
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}
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void
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ircd::fs::truncate(const string_view &path,
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const size_t &size,
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const write_opts &opts)
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{
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const fd fd
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{
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path, std::ios::out | std::ios::trunc
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};
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return truncate(fd, size, opts);
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}
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void
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ircd::fs::truncate(const fd &fd,
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const size_t &size,
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const write_opts &opts)
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{
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syscall(::ftruncate, fd, size);
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}
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ircd::const_buffer
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ircd::fs::overwrite(const string_view &path,
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const const_buffer &buf,
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const write_opts &opts)
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{
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const fd fd
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{
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path, std::ios::out | std::ios::trunc
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};
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return overwrite(fd, buf, opts);
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}
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ircd::const_buffer
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ircd::fs::overwrite(const fd &fd,
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const const_buffer &buf,
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const write_opts &opts)
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{
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return write(fd, buf, opts);
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}
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ircd::const_buffer
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ircd::fs::append(const string_view &path,
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const const_buffer &buf,
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const write_opts &opts)
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{
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const fd fd
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{
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path, std::ios::out | std::ios::app
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};
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return write(fd, buf, opts);
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}
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ircd::const_buffer
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ircd::fs::append(const fd &fd,
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const const_buffer &buf,
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const write_opts &opts_)
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try
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{
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auto opts(opts_);
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if(!opts.offset)
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opts.offset = syscall(::lseek, fd, 0, SEEK_END);
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return write(fd, buf, opts);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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ircd::const_buffer
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ircd::fs::write(const string_view &path,
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const const_buffer &buf,
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const write_opts &opts)
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try
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{
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const fd fd
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{
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path, std::ios::out
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};
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return write(fd, buf, opts);
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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ircd::const_buffer
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ircd::fs::write(const fd &fd,
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const const_buffer &buf,
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const write_opts &opts)
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try
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{
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#ifdef IRCD_USE_AIO
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if(likely(aioctx))
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return write__aio(fd, buf, opts);
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#endif
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return
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{
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data(buf),
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size_t(syscall(::pwrite, fd, data(buf), size(buf), opts.offset))
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};
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}
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catch(const error &e)
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{
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throw;
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}
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catch(const filesystem::filesystem_error &e)
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{
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throw error{e};
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}
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catch(const std::exception &e)
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{
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throw error
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{
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"%s", e.what()
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};
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// fs/fd.h
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//
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// TODO: x-platform
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//
|
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namespace ircd::fs
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{
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thread_local char path_buf[PATH_MAX];
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static const char *path_str(const string_view &);
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static uint posix_flags(const std::ios::openmode &mode);
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}
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#ifdef HAVE_SYS_STAT_H
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size_t
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ircd::fs::block_size(const fd &fd)
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{
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struct stat stat;
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syscall(::fstat, fd, &stat);
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return stat.st_blksize;
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}
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#else
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size_t
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ircd::fs::block_size(const fd &fd)
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{
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return info::page_size;
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}
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#endif
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|
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/// This is not a standard UUID of any sort; this is custom, and intended for
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/// rocksdb (though rocksdb has no requirement for its format specifically).
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/// The format is plain-text, fs major and minor number, inode number, and
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/// a three letter file type; all obtained from fstat(2).
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ircd::string_view
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ircd::fs::uuid(const fd &fd,
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const mutable_buffer &buf)
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{
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struct stat stat;
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syscall(::fstat, fd, &stat);
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return fmt::sprintf
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|
{
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buf, "%u-%u-%lu-%s",
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gnu_dev_major(stat.st_dev),
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gnu_dev_minor(stat.st_dev),
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stat.st_ino,
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S_ISREG(stat.st_mode)? "reg":
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S_ISDIR(stat.st_mode)? "dir":
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"???"
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};
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}
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size_t
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ircd::fs::size(const fd &fd)
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{
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const off_t cur
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{
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syscall(::lseek, fd, 0, SEEK_CUR)
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};
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const off_t end
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{
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syscall(::lseek, fd, 0, SEEK_END)
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};
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syscall(::lseek, fd, cur, SEEK_SET);
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return end;
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}
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|
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uint
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ircd::fs::posix_flags(const std::ios::openmode &mode)
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{
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static const auto rdwr
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{
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std::ios::in | std::ios::out
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};
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|
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uint ret{0};
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if((mode & rdwr) == rdwr)
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ret |= O_RDWR;
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else if(mode & std::ios::out)
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ret |= O_WRONLY;
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else
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ret |= O_RDONLY;
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|
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ret |= mode & std::ios::trunc? O_TRUNC : 0;
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ret |= mode & std::ios::app? O_APPEND : 0;
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ret |= ret & O_WRONLY? O_CREAT : 0;
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ret |= ret & O_RDWR && ret & (O_TRUNC | O_APPEND)? O_CREAT : 0;
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return ret;
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}
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|
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const char *
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|
ircd::fs::path_str(const string_view &s)
|
|
{
|
|
return data(strlcpy(path_buf, s));
|
|
}
|
|
|
|
//
|
|
// fd::opts
|
|
//
|
|
|
|
ircd::fs::fd::opts::opts(const std::ios::openmode &mode)
|
|
:flags
|
|
{
|
|
posix_flags(mode)
|
|
}
|
|
,mask
|
|
{
|
|
flags & O_CREAT?
|
|
S_IRUSR | S_IWUSR:
|
|
0U
|
|
}
|
|
,ate
|
|
{
|
|
bool(mode & std::ios::ate)
|
|
}
|
|
{
|
|
}
|
|
|
|
//
|
|
// fd::fd
|
|
//
|
|
|
|
ircd::fs::fd::fd(const string_view &path)
|
|
:fd{path, opts{}}
|
|
{
|
|
}
|
|
|
|
ircd::fs::fd::fd(const string_view &path,
|
|
const opts &opts)
|
|
:fdno{[&path, &opts]
|
|
() -> int
|
|
{
|
|
uint flags(opts.flags);
|
|
flags |= opts.direct? O_DIRECT : 0UL;
|
|
flags |= opts.cloexec? O_CLOEXEC : 0UL;
|
|
flags &= opts.nocreate? ~O_CREAT : flags;
|
|
|
|
const mode_t &mode(opts.mask);
|
|
assert((flags & ~O_CREAT) || mode != 0);
|
|
|
|
const char *const &p(path_str(path));
|
|
return syscall(::open, p, flags, mode);
|
|
}()}
|
|
{
|
|
if(opts.ate)
|
|
syscall(::lseek, fdno, 0, SEEK_END);
|
|
}
|
|
|
|
ircd::fs::fd::fd(fd &&o)
|
|
noexcept
|
|
:fdno
|
|
{
|
|
std::move(o.fdno)
|
|
}
|
|
{
|
|
o.fdno = -1;
|
|
}
|
|
|
|
ircd::fs::fd &
|
|
ircd::fs::fd::operator=(fd &&o)
|
|
noexcept
|
|
{
|
|
this->~fd();
|
|
fdno = std::move(o.fdno);
|
|
o.fdno = -1;
|
|
return *this;
|
|
}
|
|
|
|
ircd::fs::fd::~fd()
|
|
noexcept(false)
|
|
{
|
|
if(fdno < 0)
|
|
return;
|
|
|
|
syscall(::close, fdno);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
//
|
|
// fs.h / misc
|
|
//
|
|
|
|
std::string
|
|
ircd::fs::cwd()
|
|
try
|
|
{
|
|
return filesystem::current_path().string();
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
void
|
|
ircd::fs::chdir(const string_view &path)
|
|
try
|
|
{
|
|
filesystem::current_path(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error
|
|
{
|
|
e, "`%s' :%s", path, e.what()
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::mkdir(const string_view &path)
|
|
try
|
|
{
|
|
return filesystem::create_directories(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error
|
|
{
|
|
e, "`%s' :%s", path, e.what()
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::remove(const string_view &path)
|
|
try
|
|
{
|
|
return filesystem::remove(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error
|
|
{
|
|
e, "`%s' :%s", path, e.what()
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::remove(std::nothrow_t,
|
|
const string_view &path)
|
|
{
|
|
boost::system::error_code ec;
|
|
return filesystem::remove(fs::path(path), ec);
|
|
}
|
|
|
|
void
|
|
ircd::fs::rename(const string_view &old,
|
|
const string_view &new_)
|
|
try
|
|
{
|
|
filesystem::rename(path(old), path(new_));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error
|
|
{
|
|
e, "`%s' -> `%s' :%s", old, new_, e.what()
|
|
};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::rename(std::nothrow_t,
|
|
const string_view &old,
|
|
const string_view &new_)
|
|
{
|
|
boost::system::error_code ec;
|
|
filesystem::rename(path(old), path(new_), ec);
|
|
return !ec;
|
|
}
|
|
|
|
std::vector<std::string>
|
|
ircd::fs::ls_recursive(const string_view &path)
|
|
try
|
|
{
|
|
const filesystem::recursive_directory_iterator end;
|
|
filesystem::recursive_directory_iterator it
|
|
{
|
|
fs::path(path)
|
|
};
|
|
|
|
std::vector<std::string> ret;
|
|
std::transform(it, end, std::back_inserter(ret), []
|
|
(const auto &ent)
|
|
{
|
|
return ent.path().string();
|
|
});
|
|
|
|
return ret;
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
std::vector<std::string>
|
|
ircd::fs::ls(const string_view &path)
|
|
try
|
|
{
|
|
static const filesystem::directory_iterator end;
|
|
filesystem::directory_iterator it
|
|
{
|
|
fs::path(path)
|
|
};
|
|
|
|
std::vector<std::string> ret;
|
|
std::transform(it, end, std::back_inserter(ret), []
|
|
(const auto &ent)
|
|
{
|
|
return ent.path().string();
|
|
});
|
|
|
|
return ret;
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::direct_io_support(const string_view &path)
|
|
try
|
|
{
|
|
fd::opts opts{std::ios::out};
|
|
opts.direct = true;
|
|
fd{path, opts};
|
|
return true;
|
|
}
|
|
catch(const std::system_error &e)
|
|
{
|
|
const auto &code(e.code());
|
|
if(code.category() == std::system_category()) switch(code.value())
|
|
{
|
|
case int(std::errc::invalid_argument):
|
|
return false;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
throw;
|
|
}
|
|
|
|
size_t
|
|
ircd::fs::size(const string_view &path)
|
|
{
|
|
return filesystem::file_size(fs::path(path));
|
|
}
|
|
|
|
bool
|
|
ircd::fs::is_reg(const string_view &path)
|
|
try
|
|
{
|
|
return filesystem::is_regular_file(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::is_dir(const string_view &path)
|
|
try
|
|
{
|
|
return filesystem::is_directory(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
bool
|
|
ircd::fs::exists(const string_view &path)
|
|
try
|
|
{
|
|
return filesystem::exists(fs::path(path));
|
|
}
|
|
catch(const filesystem::filesystem_error &e)
|
|
{
|
|
throw error{e};
|
|
}
|
|
|
|
std::string
|
|
ircd::fs::make_path(const vector_view<const std::string> &list)
|
|
{
|
|
filesystem::path ret;
|
|
for(const auto &s : list)
|
|
ret /= path(s);
|
|
|
|
return ret.string();
|
|
}
|
|
|
|
std::string
|
|
ircd::fs::make_path(const vector_view<const string_view> &list)
|
|
{
|
|
filesystem::path ret;
|
|
for(const auto &s : list)
|
|
ret /= path(s);
|
|
|
|
return ret.string();
|
|
}
|
|
|
|
filesystem::path
|
|
ircd::fs::path(const vector_view<const string_view> &list)
|
|
{
|
|
filesystem::path ret;
|
|
for(const auto &s : list)
|
|
ret /= path(s);
|
|
|
|
return ret.string();
|
|
}
|
|
|
|
filesystem::path
|
|
ircd::fs::path(const string_view &s)
|
|
{
|
|
return path(std::string{s});
|
|
}
|
|
|
|
filesystem::path
|
|
ircd::fs::path(std::string s)
|
|
{
|
|
return filesystem::path(std::move(s));
|
|
}
|
|
|
|
//
|
|
// fs/error.h
|
|
//
|
|
|
|
std::error_code
|
|
ircd::make_error_code(const boost::filesystem::filesystem_error &e)
|
|
{
|
|
const boost::system::error_code &ec
|
|
{
|
|
e.code()
|
|
};
|
|
|
|
return make_error_code(ec);
|
|
}
|