Linux下编程日记--目录/文件操作及返回命令结果
说明:
本代码的作用是:
1.获取指定目录前缀下的当前工作目录所有目录;
2.遍历获取的所有目录,获得目录下的指定后缀名的所有文件名;
3.以dir1/file1.abc, dir1/file2.abc, dir2/fff.abc, dir2/fff.abc…为例, 以目录为单位两两取出调用可执行程度compare进行比对, 并将执行结果使用popen返回;
4.将结果保存到指定文件中去
#include
#include
#include
#include
#include
#include
#include
#include
using namespace std;
/** 获取指定目录下,带有指定前缀的文件夹名称列表*/
vector<string> get_sub_dirs(string path, string prefix = "")
{vector<string> ret;DIR *dir;struct dirent *ptr;if( (dir = opendir(path.c_str())) == NULL ) {cerr << "open dir fail" << endl;exit(-1);}while((ptr = readdir(dir)) != NULL) {if(strcmp(ptr->d_name, ".") == 0 || strcmp(ptr->d_name, "..") == 0) {continue;}if(4 == ptr->d_type) {string tmp(ptr->d_name);if(tmp.find(prefix) == 0) {ret.push_back(path + "/" + ptr->d_name);//cout << ptr->d_name << endl;}}}closedir(dir);sort(ret.begin(), ret.end());return ret;
}
/** 获取指定目录下指定后缀名的所有文件列表*/
vector<string> get_need_files(string path)
{vector<string> ret;DIR *dir;struct dirent *ptr;if( (dir = opendir(path.c_str())) == NULL ) {cerr << "open dir fail" << endl;exit(-1);}while((ptr = readdir(dir)) != NULL) {if(strcmp(ptr->d_name, ".") == 0 || strcmp(ptr->d_name, "..") == 0) {continue;}if(8 == ptr->d_type) {string tmp = ptr->d_name;int pos = (tmp).find_last_of('.');if(pos == -1) {continue;}string suffix = tmp.substr(pos + 1);//cout << suffix << endl;if(suffix == "abc") {ret.push_back(ptr->d_name);cout << ptr->d_name << endl;}}}closedir(dir);return ret;
}int main(int argc, char **argv)
{if(argc < 3) {cout << "dir prefix is inneed." << endl;cout << "usage: ./main dir_prefix outPath!!!";return -1;}string prefix = argv[1];string outPath = argv[2];char pwd_path[256];if( !getcwd(pwd_path, 256) ){cerr << "get cureent path fail" << endl;return -1;}string curPath = pwd_path;cout << curPath << endl;vector<string> sub_dirs = get_sub_dirs(curPath, prefix);ofstream out;out.open(outPath.c_str());char buff[1024];//调用比对程度,并通过popen读取比对结果,将结果保存到指定输出文件中for(int i = 0; i < sub_dirs.size(); ++ i) {for(int j = i + 1; j < sub_dirs.size(); ++ j) {vector<string> file_list1 = get_need_files(sub_dirs[i]);vector<string> file_list2 = get_need_files(sub_dirs[j]);for(vector<string>::iterator it = file_list1.begin(); it != file_list1.end(); ++ it) {for(vector<string>::iterator pp = file_list2.begin(); pp != file_list2.end(); ++ pp) {memset(buff, 0, sizeof(buff));FILE *stream;string cmd = "./compare " + sub_dirs[i] + "/" + *it+ " " + sub_dirs[j] + "/" + *pp;stream = popen(cmd.c_str(), "r");fread(buff, sizeof(char), sizeof(buff), stream);out << cmd << endl;out << buff;}}}}out.close();return 0;
}
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