109 lines
2.4 KiB
C++
109 lines
2.4 KiB
C++
// Copyright (c) 2010, Amar Takhar <verm@aegisub.org>
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//
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// Permission to use, copy, modify, and 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 appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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//
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// $Id$
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/// @file access.cpp
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/// @brief Unix access methods.
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/// @ingroup libaegisub unix
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#ifndef LAGI_PRE
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#include <sys/stat.h>
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#include <errno.h>
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#include <iostream>
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#include <fstream>
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#endif
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#include "libaegisub/util.h"
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namespace agi {
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namespace acs {
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void CheckFileRead(const std::string &file) {
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Check(file, acs::FileRead);
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}
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void CheckFileWrite(const std::string &file) {
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Check(file, acs::FileWrite);
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}
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void CheckDirRead(const std::string &dir) {
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Check(dir, acs::DirRead);
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}
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void CheckDirWrite(const std::string &dir) {
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Check(dir, acs::DirWrite);
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}
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void Check(const std::string &file, acs::Type type) {
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struct stat file_stat;
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int file_status;
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file_status = stat(file.c_str(), &file_stat);
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if (file_status != 0) {
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switch (errno) {
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case ENOENT:
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throw FileNotFoundError("File or path not found.");
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break;
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case EACCES:
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throw Read("Access Denied to file, path or path component.");
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break;
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case EIO:
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throw Fatal("Fatal I/O error occurred.");
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break;
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}
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}
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switch (type) {
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case FileRead:
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case FileWrite:
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if ((file_stat.st_mode & S_IFREG) == 0)
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throw NotAFile("Not a file.");
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break;
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case DirRead:
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case DirWrite:
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if ((file_stat.st_mode & S_IFDIR) == 0)
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throw NotADirectory("Not a directory.");
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break;
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}
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switch (type) {
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case DirRead:
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case FileRead:
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file_status = access(file.c_str(), R_OK);
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if (file_status != 0)
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throw Read("File or directory is not readable.");
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break;
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case DirWrite:
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case FileWrite:
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file_status = access(file.c_str(), W_OK);
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if (file_status != 0)
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throw Write("File or directory is not writable.");
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break;
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}
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}
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} // namespace acs
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} // namespace agi
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