Кто такой Тузик и чем он прославился?
сабж Отстал от жизни
Проблема в том, что после закачки файла анонимусом права на этот файл такие: -rw------- Однако в конфиге есть: anon_umask=022 А вот и сам конфиг: listen=YES file_open_mode=0666 anonymous_enable=YES anon_umask=022 anon_root=/home/ftp anon_upload_enable=YES anon_mkdir_write_enable=YES local_enable=YES chroot_local_user=YES write_enable=YES local_umask=022 # Activate directory messages - messages given to remote users when they # go into a certain directory. dirmessage_enable=YES # Activate logging of uploads/downloads. xferlog_enable=YES # Make sure PORT transfer connections originate from port 20 (ftp-data). connect_from_port_20=YES # If you want, you can arrange for uploaded anonymous files to be owned by # a different user. Note! Using "root" for uploaded files is not # recommended! chown_uploads=YES chown_username=ftp xferlog_file=/var/log/vsftpd.log # If you want, you can have your log file in standard ftpd xferlog format #xferlog_std_format=YES # You may change the default value for timing out an idle session. #idle_session_timeout=600 # You may change the default value for timing out a data connection. #data_connection_timeout=120 # It is recommended that you define on your system a unique user which the # ftp server can use as a totally isolated and unprivileged user. #nopriv_user=ftpsecure # Enable this and the server will recognise asynchronous ABOR requests. Not # recommended for security (the code is non-trivial). Not enabling it, # however, may confuse older FTP clients. #async_abor_enable=YES # By default the server will pretend to allow ASCII mode but in fact ignore # the request. Turn on the below options to have the server actually do ASCII # mangling on files when in ASCII mode. # Beware that turning on ascii_download_enable enables malicious remote parties # to consume your I/O resources, by issuing the command "SIZE /big/file" in # ASCII mode. # These ASCII options are split into upload and download because you may wish # to enable ASCII uploads (to prevent uploaded scripts etc. from breaking), # without the DoS risk of SIZE and ASCII downloads. ASCII mangling should be # on the client anyway.. #ascii_upload_enable=YES #ascii_download_enable=YES # You may fully customise the login banner string: ftpd_banner=Welcome to Selecter FTP. # You may specify a file of disallowed anonymous e-mail addresses. Apparently # useful for combatting certain DoS attacks. #deny_email_enable=YES # (default follows) #banned_email_file=/etc/vsftpd.banned_emails chroot_list_enable=YES chroot_list_file=/etc/vsftpd.chroot_list # You may activate the "-R" option to the builtin ls. This is disabled by # default to avoid remote users being able to cause excessive I/O on large # sites. However, some broken FTP clients such as "ncftp" and "mirror" assume # the presence of the "-R" option, so there is a strong case for enabling it. #ls_recurse_enable=YES # Debian customization # # Some of vsftpd's settings don't fit the Debian filesystem layout by # default. These settings are more Debian-friendly. # # This option should be the name of a directory which is empty. Also, the # directory should not be writable by the ftp user. This directory is used # as a secure chroot() jail at times vsftpd does not require filesystem # access. secure_chroot_dir=/var/run/vsftpd # # This string is the name of the PAM service vsftpd will use. pam_service_name=vsftpd # # This option specifies the location of the RSA certificate to use for SSL # encrypted connections. rsa_cert_file=/etc/ssl/certs/vsftpd.pem
//------------------------------------------------------------------------------
// Задача 1.15
//
// "Косой" квадрат. У квадрата ABCD на плоскости известны координаты двух
// противоположных вершин - точек A, C.
//
// Задание: Найти координаты точек B и D
//------------------------------------------------------------------------------
#include <iostream>
#include <string>
#include <cmath>
using namespace std;
int main(int argc, char *argv[])
{
const float A[2] = {-1, 1};
const float C[2] = {2, 2};
float B[2],D[2];
enum{x,y};
//Находим диагональ квадрата
float AClen = sqrt(pow(C[y]-A[y], 2) + pow(C[x]-A[x], 2));
//Находим сторону квардрата
float a = sin(45.0 * M_PI/180) * AClen;
//Находим угловой коэффициент прямой AClen
float k1 = (C[y] - A[y]) / (C[x] - A[x]);
//Находим угловой коэффициент прямой AB
//В итоге из уравнения (tan45=1) получаем: k2-k1*k2=1+k1
float k2 = (1+k1) / (float)(1.0 - k1);
cout << "B: " << B[0] << "," << B[1] << endl;
cout << "D: " << D[0] << "," << D[1] << endl;
return 0;
}
Нашёл:
Длину AC
Сторону квадрата
Угловой коэффициент прямой AC
Угловой коэффициент прямой AB
Застопорился... С математикой туговато. Уже долго искал следующий шаг - не найти.| ← назад |