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/*
Copyright 2014 TeamWin
This file is part of TWRP/TeamWin Recovery Project.
TWRP 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 3 of the License, or
(at your option) any later version.
TWRP 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.
You should have received a copy of the GNU General Public License
along with TWRP. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string>
#include <vector>
#include <dirent.h>
#include <stdlib.h>
#include "find_file.hpp"
#include "twrp-functions.hpp"
#include "twcommon.h"
using namespace std;
string Find_File::Find(const string& file_name, const string& start_path) {
return Find_File().Find_Internal(file_name, start_path);
}
Find_File::Find_File() {
}
string Find_File::Find_Internal(const string& filename, const string& starting_path) {
DIR *d;
string new_path, return_path;
vector<string> dirs;
vector<string> symlinks;
unsigned index;
// Check to see if we have already searched this directory to prevent infinite loops
if (std::find(searched_dirs.begin(), searched_dirs.end(), starting_path) != searched_dirs.end()) {
return "";
}
searched_dirs.push_back(starting_path);
d = opendir(starting_path.c_str());
if (d == NULL) {
LOGERR("Find_File: Error opening '%s'\n", starting_path.c_str());
return "";
}
struct dirent *p;
while ((p = readdir(d))) {
if (!strcmp(p->d_name, ".") || !strcmp(p->d_name, ".."))
continue;
new_path = starting_path + "/";
new_path.append(p->d_name);
if (p->d_type == DT_DIR) {
// Add dir to search list for later
dirs.push_back(new_path);
} else if (p->d_type == DT_LNK) {
// Add symlink to search list for later
symlinks.push_back(new_path);
} else if (p->d_type == DT_REG && filename == p->d_name) {
// We found a match!
closedir(d);
return new_path;
}
}
closedir(d);
// Scan real directories first if no match found in this path
for (index = 0; index < dirs.size(); index++) {
return_path = Find_Internal(filename, dirs.at(index));
if (!return_path.empty()) return return_path;
}
// Scan symlinks after scanning real directories
for (index = 0; index < symlinks.size(); index++) {
char buf[PATH_MAX];
// Resolve symlink to a real path
char* ret = realpath(symlinks.at(index).c_str(), buf);
if (ret) {
return_path = Find_Internal(filename, buf);
if (!return_path.empty()) return return_path;
}
}
return "";
}
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