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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "FileUtils.h"
#include <AK/FileSystemPath.h>
#include <AK/StringBuilder.h>
#include <LibCore/DirIterator.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/stat.h>
#include <unistd.h>
namespace FileUtils {
int delete_directory(String directory, String& file_that_caused_error)
{
Core::DirIterator iterator(directory, Core::DirIterator::SkipDots);
if (iterator.has_error()) {
file_that_caused_error = directory;
return -1;
}
while (iterator.has_next()) {
auto file_to_delete = String::format("%s/%s", directory.characters(), iterator.next_path().characters());
struct stat st;
if (lstat(file_to_delete.characters(), &st)) {
file_that_caused_error = file_to_delete;
return errno;
}
if (S_ISDIR(st.st_mode)) {
if (delete_directory(file_to_delete, file_to_delete)) {
file_that_caused_error = file_to_delete;
return errno;
}
} else if (unlink(file_to_delete.characters())) {
file_that_caused_error = file_to_delete;
return errno;
}
}
if (rmdir(directory.characters())) {
file_that_caused_error = directory;
return errno;
}
return 0;
}
bool copy_file_or_directory(const String& src_path, const String& dst_path)
{
int duplicate_count = 0;
while (access(get_duplicate_name(dst_path, duplicate_count).characters(), F_OK) == 0) {
++duplicate_count;
}
if (duplicate_count != 0) {
return copy_file_or_directory(src_path, get_duplicate_name(dst_path, duplicate_count));
}
int src_fd = open(src_path.characters(), O_RDONLY);
if (src_fd < 0) {
return false;
}
struct stat src_stat;
int rc = fstat(src_fd, &src_stat);
if (rc < 0) {
return false;
}
if (S_ISDIR(src_stat.st_mode)) {
return copy_directory(src_path, dst_path);
}
return copy_file(src_path, dst_path, src_stat, src_fd);
}
bool copy_directory(const String& src_path, const String& dst_path)
{
int rc = mkdir(dst_path.characters(), 0755);
if (rc < 0) {
return false;
}
Core::DirIterator di(src_path, Core::DirIterator::SkipDots);
if (di.has_error()) {
return false;
}
while (di.has_next()) {
String filename = di.next_path();
bool is_copied = copy_file_or_directory(
String::format("%s/%s", src_path.characters(), filename.characters()),
String::format("%s/%s", dst_path.characters(), filename.characters()));
if (!is_copied) {
return false;
}
}
return true;
}
bool copy_file(const String& src_path, const String& dst_path, const struct stat& src_stat, int src_fd)
{
int dst_fd = creat(dst_path.characters(), 0666);
if (dst_fd < 0) {
if (errno != EISDIR) {
return false;
}
auto dst_dir_path = String::format("%s/%s", dst_path.characters(), FileSystemPath(src_path).basename().characters());
dst_fd = creat(dst_dir_path.characters(), 0666);
if (dst_fd < 0) {
return false;
}
}
if (src_stat.st_size > 0) {
if (ftruncate(dst_fd, src_stat.st_size) < 0) {
perror("cp: ftruncate");
return false;
}
}
for (;;) {
char buffer[32768];
ssize_t nread = read(src_fd, buffer, sizeof(buffer));
if (nread < 0) {
return false;
}
if (nread == 0)
break;
ssize_t remaining_to_write = nread;
char* bufptr = buffer;
while (remaining_to_write) {
ssize_t nwritten = write(dst_fd, bufptr, remaining_to_write);
if (nwritten < 0) {
return false;
}
assert(nwritten > 0);
remaining_to_write -= nwritten;
bufptr += nwritten;
}
}
auto my_umask = umask(0);
umask(my_umask);
int rc = fchmod(dst_fd, src_stat.st_mode & ~my_umask);
if (rc < 0) {
return false;
}
close(src_fd);
close(dst_fd);
return true;
}
String get_duplicate_name(const String& path, int duplicate_count)
{
if (duplicate_count == 0) {
return path;
}
FileSystemPath fsp(path);
StringBuilder duplicated_name;
duplicated_name.append('/');
for (int i = 0; i < fsp.parts().size() - 1; ++i) {
duplicated_name.appendf("%s/", fsp.parts()[i].characters());
}
auto prev_duplicate_tag = String::format("(%d)", duplicate_count);
auto title = fsp.title();
if (title.ends_with(prev_duplicate_tag)) {
// remove the previous duplicate tag "(n)" so we can add a new tag.
title = title.substring(0, title.length() - prev_duplicate_tag.length());
}
duplicated_name.appendf("%s (%d)", fsp.title().characters(), duplicate_count);
if (!fsp.extension().is_empty()) {
duplicated_name.appendf(".%s", fsp.extension().characters());
}
return duplicated_name.build();
}
}
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