src/tools/file_tools.cpp

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#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <errno.h>
#include <string.h>
#include <alloca.h>
#include <stdio.h>
#include "file_tools.h"

std::string RemoveDir(const char* path)
{
        DIR* cwd = opendir(path);
        if(cwd == NULL)
                return "Couldn't opendir " + std::string(path) + " : " + std::string(strerror(errno));

        struct dirent* dir;

        while((dir = readdir(cwd)) != NULL)
        {
                if(!strcmp(dir->d_name, ".")  || !strcmp(dir->d_name, ".."))
                        continue;
                
                unsigned int path_len = strlen(path) + strlen(dir->d_name) + 1;
                char* full_path = (char*)alloca(path_len + 1);
                full_path[path_len] = '\0';
                snprintf(full_path, path_len, "%s/%s", path, dir->d_name);

                if(dir->d_type == 8) // file
                {
                        if(unlink(full_path) == -1)
                        {
                                closedir(cwd);
                                return "Couldn't remove file " + std::string(full_path) + " : " + std::string(strerror(errno));
                        }
                }
                else
                if(dir->d_type == 4) // file
                {
                        std::string err = RemoveDir(full_path);
                        if(err != "")
                                return err;
                }
        }
        closedir(cwd);
        if(rmdir(path) == -1)
                return "Couldn't remove directory " + std::string(path) + " : " + std::string(strerror(errno));
        return "";
}

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