/*
-Minetest-c55
-Copyright (C) 2010 celeron55, Perttu Ahola <celeron55@gmail.com>
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GNU Lesser General Public License for more details.
-You should have received a copy of the GNU General Public License along
+You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "filesys.h"
-#include "strfnd.h"
+#include "util/string.h"
#include <iostream>
-#include <string.h>
+#include <cstdio>
+#include <cstring>
+#include <cerrno>
+#include <fstream>
+#include "log.h"
+#include "config.h"
+#include "porting.h"
+#ifdef __ANDROID__
+#include "settings.h" // For g_settings
+#endif
namespace fs
{
#ifdef _WIN32 // WINDOWS
#define _WIN32_WINNT 0x0501
-#include <Windows.h>
-#include <stdio.h>
-#include <malloc.h>
-#include <tchar.h>
-#include <wchar.h>
-#include <stdio.h>
-
-#define BUFSIZE MAX_PATH
+#include <windows.h>
+#include <shlwapi.h>
-std::vector<DirListNode> GetDirListing(std::string pathstring)
+std::vector<DirListNode> GetDirListing(const std::string &pathstring)
{
std::vector<DirListNode> listing;
WIN32_FIND_DATA FindFileData;
HANDLE hFind = INVALID_HANDLE_VALUE;
DWORD dwError;
- LPTSTR DirSpec;
- INT retval;
-
- DirSpec = (LPTSTR) malloc (BUFSIZE);
-
- if( DirSpec == NULL )
- {
- printf( "Insufficient memory available\n" );
- retval = 1;
- goto Cleanup;
- }
- // Check that the input is not larger than allowed.
- if (pathstring.size() > (BUFSIZE - 2))
- {
- _tprintf(TEXT("Input directory is too large.\n"));
- retval = 3;
- goto Cleanup;
- }
-
- //_tprintf (TEXT("Target directory is %s.\n"), pathstring.c_str());
-
- sprintf(DirSpec, "%s", (pathstring + "\\*").c_str());
+ std::string dirSpec = pathstring + "\\*";
// Find the first file in the directory.
- hFind = FindFirstFile(DirSpec, &FindFileData);
+ hFind = FindFirstFile(dirSpec.c_str(), &FindFileData);
- if (hFind == INVALID_HANDLE_VALUE)
- {
- _tprintf (TEXT("Invalid file handle. Error is %u.\n"),
- GetLastError());
- retval = (-1);
- }
- else
- {
+ if (hFind == INVALID_HANDLE_VALUE) {
+ dwError = GetLastError();
+ if (dwError != ERROR_FILE_NOT_FOUND && dwError != ERROR_PATH_NOT_FOUND) {
+ errorstream << "GetDirListing: FindFirstFile error."
+ << " Error is " << dwError << std::endl;
+ }
+ } else {
// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
DirListNode node;
node.name = FindFileData.cFileName;
node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
- if(node.name != "." && node.name != "..")
+ if (node.name != "." && node.name != "..")
listing.push_back(node);
// List all the other files in the directory.
- while (FindNextFile(hFind, &FindFileData) != 0)
- {
+ while (FindNextFile(hFind, &FindFileData) != 0) {
DirListNode node;
node.name = FindFileData.cFileName;
node.dir = FindFileData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
dwError = GetLastError();
FindClose(hFind);
- if (dwError != ERROR_NO_MORE_FILES)
- {
- _tprintf (TEXT("FindNextFile error. Error is %u.\n"),
- dwError);
- retval = (-1);
- goto Cleanup;
- }
+ if (dwError != ERROR_NO_MORE_FILES) {
+ errorstream << "GetDirListing: FindNextFile error."
+ << " Error is " << dwError << std::endl;
+ listing.clear();
+ return listing;
+ }
}
- retval = 0;
-
-Cleanup:
- free(DirSpec);
-
- if(retval != 0) listing.clear();
-
- //for(unsigned int i=0; i<listing.size(); i++){
- // std::cout<<listing[i].name<<(listing[i].dir?" (dir)":" (file)")<<std::endl;
- //}
-
return listing;
}
-bool CreateDir(std::string path)
+bool CreateDir(const std::string &path)
{
bool r = CreateDirectory(path.c_str(), NULL);
if(r == true)
return false;
}
-bool PathExists(std::string path)
+bool PathExists(const std::string &path)
{
return (GetFileAttributes(path.c_str()) != INVALID_FILE_ATTRIBUTES);
}
-bool RecursiveDelete(std::string path)
+bool IsPathAbsolute(const std::string &path)
{
- std::cerr<<"Removing \""<<path<<"\""<<std::endl;
+ return !PathIsRelative(path.c_str());
+}
- //return false;
-
- // This silly function needs a double-null terminated string...
- // Well, we'll just make sure it has at least two, then.
- path += "\0\0";
-
- SHFILEOPSTRUCT sfo;
- sfo.hwnd = NULL;
- sfo.wFunc = FO_DELETE;
- sfo.pFrom = path.c_str();
- sfo.pTo = NULL;
- sfo.fFlags = FOF_SILENT | FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR;
-
- int r = SHFileOperation(&sfo);
-
- if(r != 0)
- std::cerr<<"SHFileOperation returned "<<r<<std::endl;
-
- //return (r == 0);
+bool IsDir(const std::string &path)
+{
+ DWORD attr = GetFileAttributes(path.c_str());
+ return (attr != INVALID_FILE_ATTRIBUTES &&
+ (attr & FILE_ATTRIBUTE_DIRECTORY));
+}
+
+bool IsDirDelimiter(char c)
+{
+ return c == '/' || c == '\\';
+}
+
+bool RecursiveDelete(const std::string &path)
+{
+ infostream << "Recursively deleting \"" << path << "\"" << std::endl;
+ if (!IsDir(path)) {
+ infostream << "RecursiveDelete: Deleting file " << path << std::endl;
+ if (!DeleteFile(path.c_str())) {
+ errorstream << "RecursiveDelete: Failed to delete file "
+ << path << std::endl;
+ return false;
+ }
+ return true;
+ }
+ infostream << "RecursiveDelete: Deleting content of directory "
+ << path << std::endl;
+ std::vector<DirListNode> content = GetDirListing(path);
+ for (const DirListNode &n: content) {
+ std::string fullpath = path + DIR_DELIM + n.name;
+ if (!RecursiveDelete(fullpath)) {
+ errorstream << "RecursiveDelete: Failed to recurse to "
+ << fullpath << std::endl;
+ return false;
+ }
+ }
+ infostream << "RecursiveDelete: Deleting directory " << path << std::endl;
+ if (!RemoveDirectory(path.c_str())) {
+ errorstream << "Failed to recursively delete directory "
+ << path << std::endl;
+ return false;
+ }
return true;
}
+bool DeleteSingleFileOrEmptyDirectory(const std::string &path)
+{
+ DWORD attr = GetFileAttributes(path.c_str());
+ bool is_directory = (attr != INVALID_FILE_ATTRIBUTES &&
+ (attr & FILE_ATTRIBUTE_DIRECTORY));
+ if(!is_directory)
+ {
+ bool did = DeleteFile(path.c_str());
+ return did;
+ }
+ else
+ {
+ bool did = RemoveDirectory(path.c_str());
+ return did;
+ }
+}
+
+std::string TempPath()
+{
+ DWORD bufsize = GetTempPath(0, NULL);
+ if(bufsize == 0){
+ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
+ return "";
+ }
+ std::vector<char> buf(bufsize);
+ DWORD len = GetTempPath(bufsize, &buf[0]);
+ if(len == 0 || len > bufsize){
+ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
+ return "";
+ }
+ return std::string(buf.begin(), buf.begin() + len);
+}
+
#else // POSIX
#include <sys/types.h>
#include <dirent.h>
-#include <errno.h>
#include <sys/stat.h>
#include <sys/wait.h>
+#include <unistd.h>
-std::vector<DirListNode> GetDirListing(std::string pathstring)
+std::vector<DirListNode> GetDirListing(const std::string &pathstring)
{
std::vector<DirListNode> listing;
- DIR *dp;
- struct dirent *dirp;
- if((dp = opendir(pathstring.c_str())) == NULL) {
- //
std::cout<<"Error("<<errno<<") opening "<<pathstring<<std::endl;
- return listing;
- }
+ DIR *dp;
+ struct dirent *dirp;
+ if((dp = opendir(pathstring.c_str())) == NULL) {
+ //
infostream<<"Error("<<errno<<") opening "<<pathstring<<std::endl;
+ return listing;
+ }
- while ((dirp = readdir(dp)) != NULL) {
+ while ((dirp = readdir(dp)) != NULL) {
// NOTE:
// Be very sure to not include '..' in the results, it will
// result in an epic failure when deleting stuff.
- if(dirp->d_name[0]!='.'){
- DirListNode node;
- node.name = dirp->d_name;
- if(dirp->d_type == DT_DIR) node.dir = true;
- else node.dir = false;
- if(node.name != "." && node.name != "..")
- listing.push_back(node);
+ if(strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0)
+ continue;
+
+ DirListNode node;
+ node.name = dirp->d_name;
+
+ int isdir = -1; // -1 means unknown
+
+ /*
+ POSIX doesn't define d_type member of struct dirent and
+ certain filesystems on glibc/Linux will only return
+ DT_UNKNOWN for the d_type member.
+
+ Also we don't know whether symlinks are directories or not.
+ */
+#ifdef _DIRENT_HAVE_D_TYPE
+ if(dirp->d_type != DT_UNKNOWN && dirp->d_type != DT_LNK)
+ isdir = (dirp->d_type == DT_DIR);
+#endif /* _DIRENT_HAVE_D_TYPE */
+
+ /*
+ Was d_type DT_UNKNOWN, DT_LNK or nonexistent?
+ If so, try stat().
+ */
+ if(isdir == -1) {
+ struct stat statbuf{};
+ if (stat((pathstring + "/" + node.name).c_str(), &statbuf))
+ continue;
+ isdir = ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
}
- }
- closedir(dp);
+ node.dir = isdir;
+ listing.push_back(node);
+ }
+ closedir(dp);
return listing;
}
-bool CreateDir(std::string path)
+bool CreateDir(const std::string &path)
{
int r = mkdir(path.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
- if(r == 0)
- {
+ if (r == 0) {
return true;
}
- else
- {
- // If already exists, return true
- if(errno == EEXIST)
- return true;
- return false;
- }
+
+ // If already exists, return true
+ if (errno == EEXIST)
+ return true;
+ return false;
+
}
-bool PathExists(std::string path)
+bool PathExists(const std::string &path)
{
- struct stat st;
+ struct stat st{};
return (stat(path.c_str(),&st) == 0);
}
-bool RecursiveDelete(std::string path)
+bool IsPathAbsolute(const std::string &path)
+{
+ return path[0] == '/';
+}
+
+bool IsDir(const std::string &path)
+{
+ struct stat statbuf{};
+ if(stat(path.c_str(), &statbuf))
+ return false; // Actually error; but certainly not a directory
+ return ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
+}
+
+bool IsDirDelimiter(char c)
+{
+ return c == '/';
+}
+
+bool RecursiveDelete(const std::string &path)
{
/*
Execute the 'rm' command directly, by fork() and execve()
*/
-
-
std::cerr<<"Removing \""<<path<<"\""<<std::endl;
+
+
infostream<<"Removing \""<<path<<"\""<<std::endl;
//return false;
-
+
pid_t child_pid = fork();
if(child_pid == 0)
{
// Child
char argv_data[3][10000];
+#ifdef __ANDROID__
+ strcpy(argv_data[0], "/system/bin/rm");
+#else
strcpy(argv_data[0], "/bin/rm");
+#endif
strcpy(argv_data[1], "-rf");
- strncpy(argv_data[2], path.c_str(), 10000);
+ strncpy(argv_data[2], path.c_str(), sizeof(argv_data[2]) - 1);
char *argv[4];
argv[0] = argv_data[0];
argv[1] = argv_data[1];
argv[2] = argv_data[2];
argv[3] = NULL;
-
std::cerr<<"Executing '"<<argv[0]<<"' '"<<argv[1]<<"' '"
+
verbosestream<<"Executing '"<<argv[0]<<"' '"<<argv[1]<<"' '"
<<argv[2]<<"'"<<std::endl;
-
+
execv(argv[0], argv);
-
+
// Execv shouldn't return. Failed.
- return false;
+ _exit(1);
}
else
{
}
}
+bool DeleteSingleFileOrEmptyDirectory(const std::string &path)
+{
+ if (IsDir(path)) {
+ bool did = (rmdir(path.c_str()) == 0);
+ if (!did)
+ errorstream << "rmdir errno: " << errno << ": " << strerror(errno)
+ << std::endl;
+ return did;
+ }
+
+ bool did = (unlink(path.c_str()) == 0);
+ if (!did)
+ errorstream << "unlink errno: " << errno << ": " << strerror(errno)
+ << std::endl;
+ return did;
+}
+
+std::string TempPath()
+{
+ /*
+ Should the environment variables TMPDIR, TMP and TEMP
+ and the macro P_tmpdir (if defined by stdio.h) be checked
+ before falling back on /tmp?
+
+ Probably not, because this function is intended to be
+ compatible with lua's os.tmpname which under the default
+ configuration hardcodes mkstemp("/tmp/lua_XXXXXX").
+ */
+#ifdef __ANDROID__
+ return g_settings->get("TMPFolder");
+#else
+ return DIR_DELIM "tmp";
#endif
+}
-bool RecursiveDeleteContent(std::string path)
+#endif
+
+void GetRecursiveDirs(std::vector<std::string> &dirs, const std::string &dir)
+{
+ static const std::set<char> chars_to_ignore = { '_', '.' };
+ if (dir.empty() || !IsDir(dir))
+ return;
+ dirs.push_back(dir);
+ fs::GetRecursiveSubPaths(dir, dirs, false, chars_to_ignore);
+}
+
+std::vector<std::string> GetRecursiveDirs(const std::string &dir)
+{
+ std::vector<std::string> result;
+ GetRecursiveDirs(result, dir);
+ return result;
+}
+
+void GetRecursiveSubPaths(const std::string &path,
+ std::vector<std::string> &dst,
+ bool list_files,
+ const std::set<char> &ignore)
{
- std::cerr<<"Removing content of \""<<path<<"\""<<std::endl;
+ std::vector<DirListNode> content = GetDirListing(path);
+ for (const auto &n : content) {
+ std::string fullpath = path + DIR_DELIM + n.name;
+ if (ignore.count(n.name[0]))
+ continue;
+ if (list_files || n.dir)
+ dst.push_back(fullpath);
+ if (n.dir)
+ GetRecursiveSubPaths(fullpath, dst, list_files, ignore);
+ }
+}
+
+bool DeletePaths(const std::vector<std::string> &paths)
+{
+ bool success = true;
+ // Go backwards to succesfully delete the output of GetRecursiveSubPaths
+ for(int i=paths.size()-1; i>=0; i--){
+ const std::string &path = paths[i];
+ bool did = DeleteSingleFileOrEmptyDirectory(path);
+ if(!did){
+ errorstream<<"Failed to delete "<<path<<std::endl;
+ success = false;
+ }
+ }
+ return success;
+}
+
+bool RecursiveDeleteContent(const std::string &path)
+{
+ infostream<<"Removing content of \""<<path<<"\""<<std::endl;
std::vector<DirListNode> list = GetDirListing(path);
- for(unsigned int i=0; i<list.size(); i++)
- {
- if(trim(list[i].name) == "." || trim(list[i].name) == "..")
+ for (const DirListNode &dln : list) {
+ if(trim(dln.name) == "." || trim(dln.name) == "..")
continue;
- std::string childpath = path + "/" + list[i].name;
+ std::string childpath = path + DIR_DELIM + dln.name;
bool r = RecursiveDelete(childpath);
- if(r == false)
- {
- std::cerr<<"Removing \""<<childpath<<"\" failed"<<std::endl;
+ if(!r) {
+ errorstream << "Removing \"" << childpath << "\" failed" << std::endl;
return false;
}
}
return true;
}
-bool CreateAllDirs(std::string path)
+bool CreateAllDirs(const std::string &path)
{
- size_t pos;
std::vector<std::string> tocreate;
std::string basepath = path;
while(!PathExists(basepath))
{
tocreate.push_back(basepath);
- pos = basepath.rfind('/');
- if(pos == std::string::npos)
- return false;
- basepath = basepath.substr(0,pos);
+ basepath = RemoveLastPathComponent(basepath);
+ if(basepath.empty())
+ break;
}
for(int i=tocreate.size()-1;i>=0;i--)
- CreateDir(tocreate[i]);
+ if(!CreateDir(tocreate[i]))
+ return false;
+ return true;
+}
+
+bool CopyFileContents(const std::string &source, const std::string &target)
+{
+ FILE *sourcefile = fopen(source.c_str(), "rb");
+ if(sourcefile == NULL){
+ errorstream<<source<<": can't open for reading: "
+ <<strerror(errno)<<std::endl;
+ return false;
+ }
+
+ FILE *targetfile = fopen(target.c_str(), "wb");
+ if(targetfile == NULL){
+ errorstream<<target<<": can't open for writing: "
+ <<strerror(errno)<<std::endl;
+ fclose(sourcefile);
+ return false;
+ }
+
+ size_t total = 0;
+ bool retval = true;
+ bool done = false;
+ char readbuffer[BUFSIZ];
+ while(!done){
+ size_t readbytes = fread(readbuffer, 1,
+ sizeof(readbuffer), sourcefile);
+ total += readbytes;
+ if(ferror(sourcefile)){
+ errorstream<<source<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ if(readbytes > 0){
+ fwrite(readbuffer, 1, readbytes, targetfile);
+ }
+ if(feof(sourcefile) || ferror(sourcefile)){
+ // flush destination file to catch write errors
+ // (e.g. disk full)
+ fflush(targetfile);
+ done = true;
+ }
+ if(ferror(targetfile)){
+ errorstream<<target<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ }
+ infostream<<"copied "<<total<<" bytes from "
+ <<source<<" to "<<target<<std::endl;
+ fclose(sourcefile);
+ fclose(targetfile);
+ return retval;
+}
+
+bool CopyDir(const std::string &source, const std::string &target)
+{
+ if(PathExists(source)){
+ if(!PathExists(target)){
+ fs::CreateAllDirs(target);
+ }
+ bool retval = true;
+ std::vector<DirListNode> content = fs::GetDirListing(source);
+
+ for (const auto &dln : content) {
+ std::string sourcechild = source + DIR_DELIM + dln.name;
+ std::string targetchild = target + DIR_DELIM + dln.name;
+ if(dln.dir){
+ if(!fs::CopyDir(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ else {
+ if(!fs::CopyFileContents(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ }
+ return retval;
+ }
+
+ return false;
+}
+
+bool PathStartsWith(const std::string &path, const std::string &prefix)
+{
+ size_t pathsize = path.size();
+ size_t pathpos = 0;
+ size_t prefixsize = prefix.size();
+ size_t prefixpos = 0;
+ for(;;){
+ bool delim1 = pathpos == pathsize
+ || IsDirDelimiter(path[pathpos]);
+ bool delim2 = prefixpos == prefixsize
+ || IsDirDelimiter(prefix[prefixpos]);
+
+ if(delim1 != delim2)
+ return false;
+
+ if(delim1){
+ while(pathpos < pathsize &&
+ IsDirDelimiter(path[pathpos]))
+ ++pathpos;
+ while(prefixpos < prefixsize &&
+ IsDirDelimiter(prefix[prefixpos]))
+ ++prefixpos;
+ if(prefixpos == prefixsize)
+ return true;
+ if(pathpos == pathsize)
+ return false;
+ }
+ else{
+ size_t len = 0;
+ do{
+ char pathchar = path[pathpos+len];
+ char prefixchar = prefix[prefixpos+len];
+ if(FILESYS_CASE_INSENSITIVE){
+ pathchar = tolower(pathchar);
+ prefixchar = tolower(prefixchar);
+ }
+ if(pathchar != prefixchar)
+ return false;
+ ++len;
+ } while(pathpos+len < pathsize
+ && !IsDirDelimiter(path[pathpos+len])
+ && prefixpos+len < prefixsize
+ && !IsDirDelimiter(
+ prefix[prefixpos+len]));
+ pathpos += len;
+ prefixpos += len;
+ }
+ }
+}
+
+std::string RemoveLastPathComponent(const std::string &path,
+ std::string *removed, int count)
+{
+ if(removed)
+ *removed = "";
+
+ size_t remaining = path.size();
+
+ for(int i = 0; i < count; ++i){
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ // strip a path component
+ size_t component_end = remaining;
+ while(remaining != 0 && !IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ size_t component_start = remaining;
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ if(removed){
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ if(i)
+ *removed = component + DIR_DELIM + *removed;
+ else
+ *removed = component;
+ }
+ }
+ return path.substr(0, remaining);
+}
+
+std::string RemoveRelativePathComponents(std::string path)
+{
+ size_t pos = path.size();
+ size_t dotdot_count = 0;
+ while (pos != 0) {
+ size_t component_with_delim_end = pos;
+ // skip a dir delimiter
+ while (pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ // strip a path component
+ size_t component_end = pos;
+ while (pos != 0 && !IsDirDelimiter(path[pos-1]))
+ pos--;
+ size_t component_start = pos;
+
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ bool remove_this_component = false;
+ if (component == ".") {
+ remove_this_component = true;
+ } else if (component == "..") {
+ remove_this_component = true;
+ dotdot_count += 1;
+ } else if (dotdot_count != 0) {
+ remove_this_component = true;
+ dotdot_count -= 1;
+ }
+
+ if (remove_this_component) {
+ while (pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ if (component_start == 0) {
+ // We need to remove the delemiter too
+ path = path.substr(component_with_delim_end, std::string::npos);
+ } else {
+ path = path.substr(0, pos) + DIR_DELIM +
+ path.substr(component_with_delim_end, std::string::npos);
+ }
+ if (pos > 0)
+ pos++;
+ }
+ }
+
+ if (dotdot_count > 0)
+ return "";
+
+ // remove trailing dir delimiters
+ pos = path.size();
+ while (pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ return path.substr(0, pos);
+}
+
+std::string AbsolutePath(const std::string &path)
+{
+#ifdef _WIN32
+ char *abs_path = _fullpath(NULL, path.c_str(), MAX_PATH);
+#else
+ char *abs_path = realpath(path.c_str(), NULL);
+#endif
+ if (!abs_path) return "";
+ std::string abs_path_str(abs_path);
+ free(abs_path);
+ return abs_path_str;
+}
+
+const char *GetFilenameFromPath(const char *path)
+{
+ const char *filename = strrchr(path, DIR_DELIM_CHAR);
+ // Consistent with IsDirDelimiter this function handles '/' too
+ if (DIR_DELIM_CHAR != '/') {
+ const char *tmp = strrchr(path, '/');
+ if (tmp && tmp > filename)
+ filename = tmp;
+ }
+ return filename ? filename + 1 : path;
+}
+
+bool safeWriteToFile(const std::string &path, const std::string &content)
+{
+ std::string tmp_file = path + ".~mt";
+
+ // Write to a tmp file
+ std::ofstream os(tmp_file.c_str(), std::ios::binary);
+ if (!os.good())
+ return false;
+ os << content;
+ os.flush();
+ os.close();
+ if (os.fail()) {
+ // Remove the temporary file because writing it failed and it's useless.
+ remove(tmp_file.c_str());
+ return false;
+ }
+
+ bool rename_success = false;
+
+ // Move the finished temporary file over the real file
+#ifdef _WIN32
+ // When creating the file, it can cause Windows Search indexer, virus scanners and other apps
+ // to query the file. This can make the move file call below fail.
+ // We retry up to 5 times, with a 1ms sleep between, before we consider the whole operation failed
+ int number_attempts = 0;
+ while (number_attempts < 5) {
+ rename_success = MoveFileEx(tmp_file.c_str(), path.c_str(),
+ MOVEFILE_REPLACE_EXISTING | MOVEFILE_WRITE_THROUGH);
+ if (rename_success)
+ break;
+ sleep_ms(1);
+ ++number_attempts;
+ }
+#else
+ // On POSIX compliant systems rename() is specified to be able to swap the
+ // file in place of the destination file, making this a truly error-proof
+ // transaction.
+ rename_success = rename(tmp_file.c_str(), path.c_str()) == 0;
+#endif
+ if (!rename_success) {
+ warningstream << "Failed to write to file: " << path.c_str() << std::endl;
+ // Remove the temporary file because moving it over the target file
+ // failed.
+ remove(tmp_file.c_str());
+ return false;
+ }
+
return true;
}
+bool Rename(const std::string &from, const std::string &to)
+{
+ return rename(from.c_str(), to.c_str()) == 0;
+}
+
} // namespace fs
projects / oweals / minetest.git / blobdiff