mirror of
https://github.com/facebook/sapling.git
synced 2024-10-10 00:45:18 +03:00
8b9261f2a1
Summary:
Per discussion with bolinfest, this brings Eden in line with clang-format.
This diff was generated with `find . \( -iname '*.cpp' -o -iname '*.h' \) -exec bash -c "yes | arc lint {}" \;`
Reviewed By: bolinfest
Differential Revision: D6232695
fbshipit-source-id: d54942bf1c69b5b0dcd4df629f1f2d5538c9e28c
90 lines
2.1 KiB
C++
90 lines
2.1 KiB
C++
/*
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* Copyright (c) 2016-present, Facebook, Inc.
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree. An additional grant
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* of patent rights can be found in the PATENTS file in the same directory.
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*
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*/
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#include "XAttr.h"
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#include <folly/Exception.h>
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namespace facebook {
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namespace eden {
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std::string fgetxattr(int fd, folly::StringPiece name) {
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std::string result;
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// Reasonable ballpark for most attributes we might want; this saves
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// us from an extra syscall to query the size in the common case.
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result.resize(64, 0);
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auto namestr = name.str();
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// We loop until we either hit a hard error or succeed in extracting
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// the requested information.
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while (true) {
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// First, try to read into the buffer at its existing size.
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auto size = ::fgetxattr(
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fd,
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namestr.c_str(),
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&result[0],
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result.capacity()
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#ifdef __APPLE__
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,
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0, // position
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0 // options
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#endif
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);
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if (size != -1) {
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result.resize(size);
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return result;
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}
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// ERANGE means that the buffer wasn't large enough. Any other
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// error terminates our attempt to get the attribute.
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if (errno != ERANGE) {
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folly::throwSystemError("fgetxattr");
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}
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// Got the wrong size, query to find out what we should have used
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size = ::fgetxattr(
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fd,
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namestr.c_str(),
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nullptr,
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0
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#ifdef __APPLE__
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,
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0, // position
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0 // options
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#endif
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);
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if (size < 0) {
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folly::throwSystemError("fgetxattr to query the size failed");
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}
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// Make sure we have room for a trailing NUL byte.
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result.resize(size + 1, 0);
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}
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}
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void fsetxattr(int fd, folly::StringPiece name, folly::StringPiece value) {
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auto namestr = name.str();
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folly::checkUnixError(::fsetxattr(
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fd,
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namestr.c_str(),
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value.data(),
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value.size()
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#ifdef __APPLE__
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,
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0 // position
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#endif
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,
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0 // allow create and replace
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));
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}
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} // namespace eden
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} // namespace facebook
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