2 * This file is part of the GROMACS molecular simulation package.
4 * Copyright (c) 2011,2012,2013,2014,2015, by the GROMACS development team, led by
5 * Mark Abraham, David van der Spoel, Berk Hess, and Erik Lindahl,
6 * and including many others, as listed in the AUTHORS file in the
7 * top-level source directory and at http://www.gromacs.org.
9 * GROMACS is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public License
11 * as published by the Free Software Foundation; either version 2.1
12 * of the License, or (at your option) any later version.
14 * GROMACS is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with GROMACS; if not, see
21 * http://www.gnu.org/licenses, or write to the Free Software Foundation,
22 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
24 * If you want to redistribute modifications to GROMACS, please
25 * consider that scientific software is very special. Version
26 * control is crucial - bugs must be traceable. We will be happy to
27 * consider code for inclusion in the official distribution, but
28 * derived work must not be called official GROMACS. Details are found
29 * in the README & COPYING files - if they are missing, get the
30 * official version at http://www.gromacs.org.
32 * To help us fund GROMACS development, we humbly ask that you cite
33 * the research papers on the package. Check out http://www.gromacs.org.
37 * Implements functions in path.h.
39 * \author Teemu Murtola <teemu.murtola@gmail.com>
40 * \ingroup module_utility
57 #ifdef GMX_NATIVE_WINDOWS
66 #include "gromacs/utility/dir_separator.h"
67 #include "gromacs/utility/exceptions.h"
68 #include "gromacs/utility/futil.h"
69 #include "gromacs/utility/stringutil.h"
74 //! Directory separator to use when joining paths.
75 const char cDirSeparator = '/';
76 //! Directory separators to use when parsing paths.
77 const char cDirSeparators[] = "/\\";
78 /*! \var cPathSeparator
80 * Separator to use to split the PATH environment variable.
82 * When reading the PATH environment variable, Unix separates entries
83 * with colon, while windows uses semicolon.
85 #ifdef GMX_NATIVE_WINDOWS
86 const char cPathSeparator = ';';
88 const char cPathSeparator = ':';
91 //! Check whether a given character is a directory separator.
92 bool isDirSeparator(char chr)
94 return std::strchr(cDirSeparators, chr);
102 /********************************************************************
106 bool Path::containsDirectory(const std::string &path)
108 return path.find_first_of(cDirSeparators) != std::string::npos;
111 /* Check if the program name begins with "/" on unix/cygwin, or
112 * with "\" or "X:\" on windows. If not, the program name
113 * is relative to the current directory.
115 bool Path::isAbsolute(const char *path)
117 if (isDirSeparator(path[0]))
121 #ifdef GMX_NATIVE_WINDOWS
122 return path[0] != '\0' && path[1] == ':' && isDirSeparator(path[2]);
128 bool Path::isAbsolute(const std::string &path)
130 return isAbsolute(path.c_str());
133 #ifdef GMX_NATIVE_WINDOWS
136 struct handle_wrapper
139 handle_wrapper(HANDLE h)
143 if (handle != INVALID_HANDLE_VALUE)
145 ::CloseHandle(handle);
152 bool Path::isEquivalent(const std::string &path1, const std::string &path2)
154 //based on boost_1_56_0/libs/filesystem/src/operations.cpp under BSL
155 #ifdef GMX_NATIVE_WINDOWS
156 // Note well: Physical location on external media is part of the
157 // equivalence criteria. If there are no open handles, physical location
158 // can change due to defragmentation or other relocations. Thus handles
159 // must be held open until location information for both paths has
162 // p2 is done first, so any error reported is for p1
168 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
171 FILE_FLAG_BACKUP_SEMANTICS,
178 FILE_SHARE_DELETE | FILE_SHARE_READ | FILE_SHARE_WRITE,
181 FILE_FLAG_BACKUP_SEMANTICS,
184 if (h1.handle == INVALID_HANDLE_VALUE
185 || h2.handle == INVALID_HANDLE_VALUE)
187 // if one is invalid and the other isn't, then they aren't equivalent,
188 // but if both are invalid then it is an error
189 if (h1.handle == INVALID_HANDLE_VALUE
190 && h2.handle == INVALID_HANDLE_VALUE)
192 GMX_THROW(FileIOError("Path::isEquivalent called with two invalid files"));
198 // at this point, both handles are known to be valid
200 BY_HANDLE_FILE_INFORMATION info1, info2;
202 if (!GetFileInformationByHandle(h1.handle, &info1))
204 GMX_THROW(FileIOError("Path::isEquivalent: GetFileInformationByHandle failed"));
207 if (!GetFileInformationByHandle(h2.handle, &info2))
209 GMX_THROW(FileIOError("Path::isEquivalent: GetFileInformationByHandle failed"));
212 // In theory, volume serial numbers are sufficient to distinguish between
213 // devices, but in practice VSN's are sometimes duplicated, so last write
214 // time and file size are also checked.
216 info1.dwVolumeSerialNumber == info2.dwVolumeSerialNumber
217 && info1.nFileIndexHigh == info2.nFileIndexHigh
218 && info1.nFileIndexLow == info2.nFileIndexLow
219 && info1.nFileSizeHigh == info2.nFileSizeHigh
220 && info1.nFileSizeLow == info2.nFileSizeLow
221 && info1.ftLastWriteTime.dwLowDateTime
222 == info2.ftLastWriteTime.dwLowDateTime
223 && info1.ftLastWriteTime.dwHighDateTime
224 == info2.ftLastWriteTime.dwHighDateTime;
227 int e2 = stat(path2.c_str(), &s2);
228 int e1 = stat(path1.c_str(), &s1);
230 if (e1 != 0 || e2 != 0)
232 // if one is invalid and the other isn't then they aren't equivalent,
233 // but if both are invalid then it is an error.
234 if (e1 != 0 && e2 != 0)
236 GMX_THROW_WITH_ERRNO(
237 FileIOError("Path::isEquivalent called with two invalid files"),
243 // both stats now known to be valid
244 return s1.st_dev == s2.st_dev && s1.st_ino == s2.st_ino
245 // According to the POSIX stat specs, "The st_ino and st_dev fields
246 // taken together uniquely identify the file within the system."
247 // Just to be sure, size and mod time are also checked.
248 && s1.st_size == s2.st_size && s1.st_mtime == s2.st_mtime;
252 std::string Path::join(const std::string &path1,
253 const std::string &path2)
255 // TODO: Remove extra separators if they are present in the input paths.
256 return path1 + cDirSeparator + path2;
260 std::string Path::join(const std::string &path1,
261 const std::string &path2,
262 const std::string &path3)
264 // TODO: Remove extra separators if they are present in the input paths.
265 return path1 + cDirSeparator + path2 + cDirSeparator + path3;
268 std::string Path::getParentPath(const std::string &path)
270 /* Expects that the path doesn't contain "." or "..". If used on a path for
271 * which this isn't guaranteed realpath needs to be called first. */
272 size_t pos = path.find_last_of(cDirSeparators);
273 if (pos == std::string::npos)
275 return std::string();
277 return path.substr(0, pos);
280 std::string Path::getFilename(const std::string &path)
282 size_t pos = path.find_last_of(cDirSeparators);
283 if (pos == std::string::npos)
287 return path.substr(pos+1);
290 bool Path::hasExtension(const std::string &path)
292 return getFilename(path).find('.') != std::string::npos;
295 std::string Path::stripExtension(const std::string &path)
297 size_t dirSeparatorPos = path.find_last_of(cDirSeparators);
298 size_t extPos = path.find_last_of('.');
299 if (extPos == std::string::npos
300 || (dirSeparatorPos != std::string::npos && extPos < dirSeparatorPos))
304 return path.substr(0, extPos);
307 std::string Path::normalize(const std::string &path)
309 std::string result(path);
310 if (DIR_SEPARATOR != '/')
312 std::replace(result.begin(), result.end(), '/', DIR_SEPARATOR);
317 bool Path::exists(const char *path)
319 return gmx_fexist(path);
322 bool Path::exists(const std::string &path)
324 return exists(path.c_str());
327 std::string Path::getWorkingDirectory()
329 // TODO: Use exceptions instead of gmx_fatal().
330 char cwd[GMX_PATH_MAX];
331 gmx_getcwd(cwd, sizeof(cwd));
335 void Path::splitPathEnvironment(const std::string &pathEnv,
336 std::vector<std::string> *result)
342 separator = pathEnv.find(cPathSeparator, prevPos);
343 result->push_back(pathEnv.substr(prevPos, separator - prevPos));
344 prevPos = separator + 1;
346 while (separator != std::string::npos);
349 std::vector<std::string> Path::getExecutablePaths()
351 std::vector<std::string> result;
352 #ifdef GMX_NATIVE_WINDOWS
353 // Add the local dir since it is not in the path on Windows.
354 result.push_back("");
356 const char *path = std::getenv("PATH");
359 splitPathEnvironment(path, &result);
364 std::string Path::resolveSymlinks(const std::string &path)
366 /* Does not fully resolve the path like realpath/boost::canonical would.
367 * It doesn't resolve path elements (including "." or ".."), but only
368 * resolves the entire path (it does that recursively). */
369 std::string result(path);
370 #ifndef GMX_NATIVE_WINDOWS
371 char buf[GMX_PATH_MAX];
373 while ((length = readlink(result.c_str(), buf, sizeof(buf)-1)) > 0)
382 result = join(getParentPath(result), buf);
390 /********************************************************************
394 int Directory::create(const char *path)
396 if (Directory::exists(path))
400 #ifdef GMX_NATIVE_WINDOWS
403 if (mkdir(path, S_IRWXU | S_IRWXG | S_IROTH | S_IWOTH) != 0)
406 // TODO: Proper error handling.
413 int Directory::create(const std::string &path)
415 return create(path.c_str());
419 bool Directory::exists(const char *path)
422 if (stat(path, &info) != 0)
424 if (errno != ENOENT && errno != ENOTDIR)
426 // TODO: Proper error handling.
430 #ifdef GMX_NATIVE_WINDOWS
431 return ((_S_IFDIR & info.st_mode) != 0);
433 return S_ISDIR(info.st_mode);
438 bool Directory::exists(const std::string &path)
440 return exists(path.c_str());