60 lines
1.2 KiB
C++
60 lines
1.2 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 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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decltype(ircd::sys::log)
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ircd::sys::log
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{
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"sys"
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};
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ircd::string_view
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ircd::sys::get(const mutable_buffer &out,
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const string_view &relpath)
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try
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{
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thread_local char buf[1024];
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string_view path(relpath);
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path = lstrip(relpath, "/sys/"_sv); // tolerate any errant /sys/ prefix
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path = strlcpy(buf, "/sys/"_sv);
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path = strlcat(buf, relpath);
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fs::fd::opts fdopts;
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fdopts.errlog = false;
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const fs::fd fd
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{
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path, fdopts
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};
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string_view ret
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{
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data(out), size_t(sys::call(::read, fd, data(out), size(out)))
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};
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ret = rstrip(ret, '\n');
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ret = rstrip(ret, ' ');
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return ret;
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}
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catch(const ctx::interrupted &)
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{
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throw;
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}
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catch(const std::exception &e)
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{
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if constexpr((false))
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log::derror
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{
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log, "sysfs query `%s' :%s",
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relpath,
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e.what(),
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};
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return {};
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}
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