556 lines
14 KiB
C++
556 lines
14 KiB
C++
// Copyright (c) 2012-2019 Wojciech Figat. All rights reserved.
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#if PLATFORM_LINUX
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#include "LinuxFileSystem.h"
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#include "Engine/Platform/File.h"
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#include "Engine/Core/Types/String.h"
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#include "Engine/Core/Types/StringView.h"
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#include "Engine/Core/Math/Math.h"
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#include "Engine/Utilities/StringConverter.h"
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <cerrno>
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#include <dirent.h>
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#include <string.h>
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#include <stdlib.h>
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#include <fcntl.h>
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const DateTime UnixEpoch(1970, 1, 1);
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bool LinuxFileSystem::ShowOpenFileDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& filter, bool multiSelect, const StringView& title, Array<String, HeapAllocation>& filenames)
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{
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const StringAsANSI<> titleAnsi(*title, title.Length());
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char cmd[2048];
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// TODO: multiSelect support
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// TODO: filter support
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sprintf(cmd, "/usr/bin/zenity --modal --file-selection --title=\"%s\" ", titleAnsi.Get());
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FILE* f = popen(cmd, "r");
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char buf[2048];
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fgets(buf, ARRAY_COUNT(buf), f);
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int result = pclose(f);
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if (result != 0)
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{
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return true;
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}
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const char* c = buf;
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while (*c)
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{
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const char* start = c;
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while (*c != '\n')
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c++;
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filenames.Add(String(start, (int32)(c - start)));
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c++;
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}
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return false;
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}
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bool LinuxFileSystem::CreateDirectory(const StringView& path)
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{
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const StringAsANSI<> pathAnsi(*path, path.Length());
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// Skip if already exists
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struct stat fileInfo;
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if (stat(pathAnsi.Get(), &fileInfo) != -1 && S_ISDIR(fileInfo.st_mode))
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{
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return false;
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}
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// Recursively do it all again for the parent directory, if any
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const int32 slashIndex = path.FindLast('/');
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if (slashIndex > 1)
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{
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if (CreateDirectory(path.Substring(0, slashIndex)))
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{
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return true;
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}
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}
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// Create the last directory on the path (the recursive calls will have taken care of the parent directories by now)
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return mkdir(pathAnsi.Get(), 0755) != 0 && errno != EEXIST;
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}
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bool DeleteUnixPathTree(const char* path)
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{
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size_t pathLength;
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DIR* dir;
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struct stat statPath, statEntry;
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struct dirent* entry;
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// Stat for the path
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stat(path, &statPath);
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// If path does not exists or is not dir - exit with status -1
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if (S_ISDIR(statPath.st_mode) == 0)
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{
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// Is not directory
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return true;
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}
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// If not possible to read the directory for this user
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if ((dir = opendir(path)) == NULL)
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{
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// Cannot open directory
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return true;
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}
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// The length of the path
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pathLength = strlen(path);
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// Iteration through entries in the directory
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while ((entry = readdir(dir)) != NULL)
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{
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// Skip entries "." and ".."
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if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
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continue;
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// Determinate a full path of an entry
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char full_path[256];
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ASSERT(pathLength + strlen(entry->d_name) < ARRAY_COUNT(full_path));
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strcpy(full_path, path);
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strcat(full_path, "/");
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strcat(full_path, entry->d_name);
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// Stat for the entry
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stat(full_path, &statEntry);
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// Recursively remove a nested directory
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if (S_ISDIR(statEntry.st_mode) != 0)
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{
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if (DeleteUnixPathTree(full_path))
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return true;
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continue;
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}
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// Remove a file object
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if (unlink(full_path) != 0)
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return true;
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}
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// Remove the devastated directory and close the object of it
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if (rmdir(path) != 0)
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return true;
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closedir(dir);
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return false;
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}
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bool LinuxFileSystem::DeleteDirectory(const String& path, bool deleteContents)
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{
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (deleteContents)
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{
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return DeleteUnixPathTree(pathANSI.Get());
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}
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else
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{
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return rmdir(pathANSI.Get()) != 0;
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}
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}
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bool LinuxFileSystem::DirectoryExists(const StringView& path)
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{
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struct stat fileInfo;
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (stat(pathANSI.Get(), &fileInfo) != -1)
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{
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return S_ISDIR(fileInfo.st_mode);
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}
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return false;
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}
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bool LinuxFileSystem::DirectoryGetFiles(Array<String>& results, const String& path, const Char* searchPattern, DirectorySearchOption option)
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{
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const StringAsANSI<> pathANSI(*path, path.Length());
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const StringAsANSI<> searchPatternANSI(searchPattern);
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// Check if use only top directory
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if (option == DirectorySearchOption::TopDirectoryOnly)
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return getFilesFromDirectoryTop(results, pathANSI.Get(), searchPatternANSI.Get());
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return getFilesFromDirectoryAll(results, pathANSI.Get(), searchPatternANSI.Get());
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}
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bool LinuxFileSystem::GetChildDirectories(Array<String>& results, const String& directory)
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{
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size_t pathLength;
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DIR* dir;
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struct stat statPath, statEntry;
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struct dirent* entry;
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const StringAsANSI<> pathANSI(*directory, directory.Length());
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const char* path = pathANSI.Get();
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// Stat for the path
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stat(path, &statPath);
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// If path does not exists or is not dir - exit with status -1
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if (S_ISDIR(statPath.st_mode) == 0)
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{
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// Is not directory
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return true;
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}
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// If not possible to read the directory for this user
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if ((dir = opendir(path)) == NULL)
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{
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// Cannot open directory
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return true;
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}
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// The length of the path
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pathLength = strlen(path);
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// Iteration through entries in the directory
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while ((entry = readdir(dir)) != NULL)
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{
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// Skip entries "." and ".."
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if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
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continue;
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// Determinate a full path of an entry
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char full_path[256];
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ASSERT(pathLength + strlen(entry->d_name) < ARRAY_COUNT(full_path));
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strcpy(full_path, path);
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strcat(full_path, "/");
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strcat(full_path, entry->d_name);
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// Stat for the entry
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stat(full_path, &statEntry);
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// Check for directory
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if (S_ISDIR(statEntry.st_mode) != 0)
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{
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// Add directory
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results.Add(String(full_path));
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}
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}
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closedir(dir);
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return false;
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}
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bool LinuxFileSystem::FileExists(const StringView& path)
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{
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struct stat fileInfo;
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (stat(pathANSI.Get(), &fileInfo) != -1)
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{
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return S_ISREG(fileInfo.st_mode);
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}
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return false;
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}
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bool LinuxFileSystem::DeleteFile(const StringView& path)
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{
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const StringAsANSI<> pathANSI(*path, path.Length());
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return unlink(pathANSI.Get()) == 0;
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}
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uint64 LinuxFileSystem::GetFileSize(const StringView& path)
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{
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struct stat fileInfo;
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fileInfo.st_size = -1;
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (stat(pathANSI.Get(), &fileInfo) != -1)
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{
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// Check for directories
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if (S_ISDIR(fileInfo.st_mode))
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{
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fileInfo.st_size = -1;
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}
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}
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return fileInfo.st_size;
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}
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bool LinuxFileSystem::IsReadOnly(const StringView& path)
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{
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (access(pathANSI.Get(), W_OK) == -1)
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{
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return errno == EACCES;
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}
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return false;
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}
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bool LinuxFileSystem::SetReadOnly(const StringView& path, bool isReadOnly)
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{
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const StringAsANSI<> pathANSI(*path, path.Length());
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struct stat fileInfo;
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if (stat(pathANSI.Get(), &fileInfo) != -1)
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{
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if (isReadOnly)
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{
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fileInfo.st_mode &= ~S_IWUSR;
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}
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else
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{
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fileInfo.st_mode |= S_IWUSR;
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}
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return chmod(pathANSI.Get(), fileInfo.st_mode) == 0;
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}
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return false;
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}
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bool LinuxFileSystem::MoveFile(const StringView& dst, const StringView& src, bool overwrite)
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{
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if (!overwrite && FileExists(dst))
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{
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// Already exists
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return true;
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}
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return rename(StringAsANSI<>(*src, src.Length()).Get(), StringAsANSI<>(*dst, dst.Length()).Get()) != 0;
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}
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bool LinuxFileSystem::CopyFile(const StringView& dst, const StringView& src)
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{
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const StringAsANSI<> srcANSI(*src, src.Length());
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const StringAsANSI<> dstANSI(*dst, dst.Length());
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const char* from = srcANSI.Get();
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const char* to = dstANSI.Get();
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int fd_to, fd_from;
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char buf[4096];
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ssize_t nread;
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int saved_errno;
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fd_from = open(from, O_RDONLY);
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if (fd_from < 0)
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return true;
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fd_to = open(to, O_WRONLY | O_CREAT | O_EXCL, 0666);
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if (fd_to < 0)
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goto out_error;
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while (nread = read(fd_from, buf, sizeof buf), nread > 0)
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{
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char* out_ptr = buf;
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ssize_t nwritten;
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do
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{
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nwritten = write(fd_to, out_ptr, nread);
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if (nwritten >= 0)
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{
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nread -= nwritten;
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out_ptr += nwritten;
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}
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else if (errno != EINTR)
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{
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goto out_error;
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}
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} while (nread > 0);
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}
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if (nread == 0)
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{
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if (close(fd_to) < 0)
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{
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fd_to = -1;
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goto out_error;
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}
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close(fd_from);
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// Success
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return false;
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}
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out_error:
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saved_errno = errno;
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close(fd_from);
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if (fd_to >= 0)
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close(fd_to);
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errno = saved_errno;
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return true;
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}
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bool LinuxFileSystem::getFilesFromDirectoryTop(Array<String>& results, const char* path, const char* searchPattern)
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{
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size_t pathLength;
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struct stat statPath, statEntry;
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struct dirent* entry;
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// Stat for the path
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stat(path, &statPath);
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// If path does not exists or is not dir - exit with status -1
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if (S_ISDIR(statPath.st_mode) == 0)
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{
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// Is not directory
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return true;
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}
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// If not possible to read the directory for this user
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DIR* dir = opendir(path);
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if (dir == NULL)
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{
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// Cannot open directory
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return true;
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}
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// The length of the path
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pathLength = strlen(path);
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// Iteration through entries in the directory
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while ((entry = readdir(dir)) != NULL)
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{
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// Skip entries "." and ".."
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if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
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continue;
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// Determinate a full path of an entry
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char fullPath[256];
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ASSERT(pathLength + strlen(entry->d_name) < ARRAY_COUNT(fullPath));
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strcpy(fullPath, path);
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strcat(fullPath, "/");
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strcat(fullPath, entry->d_name);
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// Stat for the entry
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stat(fullPath, &statEntry);
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// Check for file
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if (S_ISREG(statEntry.st_mode) != 0)
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{
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// Validate with filter
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const int32 fullPathLength = StringUtils::Length(fullPath);
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const int32 searchPatternLength = StringUtils::Length(searchPattern);
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if (searchPatternLength == 0 || StringUtils::Compare(searchPattern, "*") == 0)
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{
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// All files
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}
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else if (searchPattern[0] == '*' && searchPatternLength < fullPathLength && StringUtils::Compare(fullPath + fullPathLength - searchPatternLength + 1, searchPattern + 1, searchPatternLength - 1) == 0)
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{
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// Path ending
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}
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else
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{
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// TODO: implement all cases in a generic way
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continue;
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}
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// Add file
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results.Add(String(fullPath));
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}
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}
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closedir(dir);
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return false;
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}
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bool LinuxFileSystem::getFilesFromDirectoryAll(Array<String>& results, const char* path, const char* searchPattern)
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{
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// Find all files in this directory
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getFilesFromDirectoryTop(results, path, searchPattern);
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size_t pathLength;
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DIR* dir;
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struct stat statPath, statEntry;
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struct dirent* entry;
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// Stat for the path
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stat(path, &statPath);
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// If path does not exists or is not dir - exit with status -1
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if (S_ISDIR(statPath.st_mode) == 0)
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{
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// Is not directory
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return true;
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}
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// If not possible to read the directory for this user
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if ((dir = opendir(path)) == NULL)
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{
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// Cannot open directory
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return true;
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}
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// The length of the path
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pathLength = strlen(path);
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// Iteration through entries in the directory
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while ((entry = readdir(dir)) != NULL)
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{
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// Skip entries "." and ".."
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if (!strcmp(entry->d_name, ".") || !strcmp(entry->d_name, ".."))
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continue;
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// Determinate a full path of an entry
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char full_path[256];
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ASSERT(pathLength + strlen(entry->d_name) < ARRAY_COUNT(full_path));
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strcpy(full_path, path);
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strcat(full_path, "/");
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strcat(full_path, entry->d_name);
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// Stat for the entry
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stat(full_path, &statEntry);
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// Check for directory
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if (S_ISDIR(statEntry.st_mode) != 0)
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{
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if (getFilesFromDirectoryAll(results, full_path, searchPattern))
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{
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closedir(dir);
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return true;
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}
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}
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}
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closedir(dir);
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return false;
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}
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DateTime LinuxFileSystem::GetFileLastEditTime(const StringView& path)
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{
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struct stat fileInfo;
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const StringAsANSI<> pathANSI(*path, path.Length());
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if (stat(pathANSI.Get(), &fileInfo) == -1)
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{
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return DateTime::MinValue();
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}
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const TimeSpan timeSinceEpoch(0, 0, fileInfo.st_mtime);
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return UnixEpoch + timeSinceEpoch;
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}
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void LinuxFileSystem::GetSpecialFolderPath(const SpecialFolder type, String& result)
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{
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const String& home = LinuxPlatform::GetHomeDirectory();
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switch (type)
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{
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case SpecialFolder::Desktop:
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result = home / TEXT("Desktop");
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break;
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case SpecialFolder::Documents:
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result = String::Empty;
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break;
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case SpecialFolder::Pictures:
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result = home / TEXT("Pictures");
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break;
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case SpecialFolder::AppData:
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result = TEXT("/usr/share");
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break;
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case SpecialFolder::LocalAppData:
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result = home;
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break;
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case SpecialFolder::ProgramData:
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result = String::Empty;
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break;
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case SpecialFolder::Temporary:
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result = TEXT("/tmp");
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break;
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default:
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CRASH;
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break;
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}
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}
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#endif
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