edc4989d9c
The former is deprecated by C++14. It's also functionally the same. From the standard: 19.4 The header<cerrno>is described in Table 43. Its contents are the same as the POSIX header<errno.h>,except that errno shall be defined as a macro. [Note: The intent is to remain in close alignment with the POSIX standard.] A separate errno value shall be provided for each thread. Signed-off-by: Rosen Penev <rosenp@gmail.com>
92 lines
2.3 KiB
C++
92 lines
2.3 KiB
C++
/*
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* Copyright 2003-2020 The Music Player Daemon Project
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* http://www.musicpd.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 2 of the License, or
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* (at your option) any later version.
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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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "FileSystem.hxx"
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#include "AllocatedPath.hxx"
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#include "Limits.hxx"
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#include "system/Error.hxx"
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#include <cerrno>
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#include <fcntl.h>
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void
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RenameFile(Path oldpath, Path newpath)
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{
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#ifdef _WIN32
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if (!MoveFileEx(oldpath.c_str(), newpath.c_str(),
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MOVEFILE_REPLACE_EXISTING))
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throw MakeLastError("Failed to rename file");
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#else
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if (rename(oldpath.c_str(), newpath.c_str()) < 0)
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throw MakeErrno("Failed to rename file");
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#endif
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}
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AllocatedPath
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ReadLink(Path path)
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{
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#ifdef _WIN32
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(void)path;
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errno = EINVAL;
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return nullptr;
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#else
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char buffer[MPD_PATH_MAX];
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ssize_t size = readlink(path.c_str(), buffer, MPD_PATH_MAX);
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if (size < 0)
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return nullptr;
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if (size_t(size) >= MPD_PATH_MAX) {
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errno = ENOMEM;
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return nullptr;
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}
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buffer[size] = '\0';
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return AllocatedPath::FromFS(buffer);
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#endif
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}
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void
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TruncateFile(Path path)
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{
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#ifdef _WIN32
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HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, nullptr,
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TRUNCATE_EXISTING, FILE_ATTRIBUTE_NORMAL,
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nullptr);
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if (h == INVALID_HANDLE_VALUE)
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throw FormatLastError("Failed to truncate %s", path.c_str());
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CloseHandle(h);
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#else
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UniqueFileDescriptor fd;
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if (!fd.Open(path.c_str(), O_WRONLY|O_TRUNC))
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throw FormatErrno("Failed to truncate %s", path.c_str());
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#endif
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}
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void
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RemoveFile(Path path)
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{
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#ifdef _WIN32
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if (!DeleteFile(path.c_str()))
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throw FormatLastError("Failed to delete %s", path.c_str());
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#else
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if (unlink(path.c_str()) < 0)
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throw FormatErrno("Failed to delete %s", path.c_str());
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#endif
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}
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