#include <fcntl.h>

#include <unistd.h>

#include <getopt.h>

#include <shadow.h>

#include "strv.h"

#include "fileio.h"

#include "copy.h"

#include "build.h"

#include "mkdir.h"

#include "time-util.h"

#include "path-util.h"

#include "locale-util.h"

#include "ask-password-api.h"

static char *arg_root = NULL;

static char *arg_locale = NULL; /* $LANG */

static char *arg_locale_messages = NULL; /* $LC_MESSAGES */

static char *arg_timezone = NULL;

static char *arg_hostname = NULL;

static sd_id128_t arg_machine_id = {};

static char *arg_root_password = NULL;

static bool arg_prompt_locale = false;

static bool arg_prompt_timezone = false;

static bool arg_prompt_hostname = false;

static bool arg_prompt_root_password = false;

static bool arg_copy_locale = false;

static bool arg_copy_timezone = false;

static bool arg_copy_root_password = false;

#define prefix_roota(p) (arg_root ? (const char*) strappenda(arg_root, p) : (const char*) p)

static void clear_string(char *x) {

if (!x)

return;

/* A delicious drop of snake-oil! */

memset(x, 'x', strlen(x));

}

static bool press_any_key(void) {

char k = 0;

bool need_nl = true;

printf("-- Press any key to proceed --");

fflush(stdout);

(void) read_one_char(stdin, &k, USEC_INFINITY, &need_nl);

if (need_nl)

putchar('\n');

return k != 'q';

}

static void print_welcome(void) {

_cleanup_free_ char *pretty_name = NULL;

const char *os_release = NULL;

static bool done = false;

int r;

if (done)

return;

os_release = prefix_roota("/etc/os-release");

r = parse_env_file(os_release, NEWLINE,

"PRETTY_NAME", &pretty_name,

NULL);

if (r == -ENOENT) {

os_release = prefix_roota("/usr/lib/os-release");

r = parse_env_file(os_release, NEWLINE,

"PRETTY_NAME", &pretty_name,

NULL);

}

if (r < 0 && r != -ENOENT)

log_warning("Failed to read os-release file: %s", strerror(-r));

printf("\nWelcome to your new installation of %s!\nPlease configure a few basic system settings:\n\n",

isempty(pretty_name) ? "Linux" : pretty_name);

press_any_key();

done = true;

}

static int show_menu(char **x, unsigned n_columns, unsigned width, unsigned percentage) {

unsigned n, per_column, i, j;

unsigned break_lines, break_modulo;

assert(n_columns > 0);

n = strv_length(x);

per_column = (n + n_columns - 1) / n_columns;

break_lines = lines();

if (break_lines > 2)

break_lines--;

/* The first page gets two extra lines, since we want to show

break_modulo = break_lines;

if (break_modulo > 3)

break_modulo -= 3;

for (i = 0; i < per_column; i++) {

for (j = 0; j < n_columns; j ++) {

_cleanup_free_ char *e = NULL;

if (j * per_column + i >= n)

break;

e = ellipsize(x[j * per_column + i], width, percentage);

if (!e)

return log_oom();

printf("%4u) %-*s", j * per_column + i + 1, width, e);

}

putchar('\n');

/* on the first screen we reserve 2 extra lines for the title */

if (i % break_lines == break_modulo) {

if (!press_any_key())

return 0;

}

}

return 0;

}

static int prompt_loop(const char *text, char **l, bool (*is_valid)(const char *name), char **ret) {

int r;

assert(text);

assert(is_valid);

assert(ret);

for (;;) {

_cleanup_free_ char *p = NULL;

unsigned u;

r = ask_string(&p, "%s %s (empty to skip): ", draw_special_char(DRAW_TRIANGULAR_BULLET), text);

if (r < 0) {

log_error("Failed to query user: %s", strerror(-r));

return r;

}

if (isempty(p)) {

log_warning("No data entered, skipping.");

return 0;

}

r = safe_atou(p, &u);

if (r >= 0) {

char *c;

if (u <= 0 || u > strv_length(l)) {

log_error("Specified entry number out of range.");

continue;

}

log_info("Selected '%s'.", l[u-1]);

c = strdup(l[u-1]);

if (!c)

return log_oom();

free(*ret);

*ret = c;

return 0;

}

if (!is_valid(p)) {

log_error("Entered data invalid.");

continue;

}

free(*ret);

*ret = p;

p = 0;

return 0;

}

}

static int prompt_locale(void) {

_cleanup_strv_free_ char **locales = NULL;

int r;

if (arg_locale || arg_locale_messages)

return 0;

if (!arg_prompt_locale)

return 0;

r = get_locales(&locales);

if (r < 0) {

log_error("Cannot query locales list: %s", strerror(-r));

return r;

}

print_welcome();

printf("\nAvailable Locales:\n\n");

r = show_menu(locales, 3, 22, 60);

if (r < 0)

return r;

putchar('\n');

r = prompt_loop("Please enter system locale name or number", locales, locale_is_valid, &arg_locale);

if (r < 0)

return r;

if (isempty(arg_locale))

return 0;

r = prompt_loop("Please enter system message locale name or number", locales, locale_is_valid, &arg_locale_messages);

if (r < 0)

return r;

return 0;

}

static int process_locale(void) {

const char *etc_localeconf;

char* locales[3];

unsigned i = 0;

int r;

etc_localeconf = prefix_roota("/etc/locale.conf");

if (faccessat(AT_FDCWD, etc_localeconf, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

if (arg_copy_locale && arg_root) {

mkdir_parents(etc_localeconf, 0755);

r = copy_file("/etc/locale.conf", etc_localeconf, 0, 0644);

if (r != -ENOENT) {

if (r < 0) {

log_error("Failed to copy %s: %s", etc_localeconf, strerror(-r));

return r;

}

log_info("%s copied.", etc_localeconf);

return 0;

}

}

r = prompt_locale();

if (r < 0)

return r;

if (!isempty(arg_locale))

locales[i++] = strappenda("LANG=", arg_locale);

if (!isempty(arg_locale_messages) && !streq(arg_locale_messages, arg_locale))

locales[i++] = strappenda("LC_MESSAGES=", arg_locale_messages);

if (i == 0)

return 0;

locales[i] = NULL;

mkdir_parents(etc_localeconf, 0755);

r = write_env_file(etc_localeconf, locales);

if (r < 0) {

log_error("Failed to write %s: %s", etc_localeconf, strerror(-r));

return r;

}

log_info("%s written.", etc_localeconf);

return 0;

}

static int prompt_timezone(void) {

_cleanup_strv_free_ char **zones = NULL;

int r;

if (arg_timezone)

return 0;

if (!arg_prompt_timezone)

return 0;

r = get_timezones(&zones);

if (r < 0) {

log_error("Cannot query timezone list: %s", strerror(-r));

return r;

}

print_welcome();

printf("\nAvailable Time Zones:\n\n");

r = show_menu(zones, 3, 22, 30);

if (r < 0)

return r;

putchar('\n');

r = prompt_loop("Please enter timezone name or number", zones, timezone_is_valid, &arg_timezone);

if (r < 0)

return r;

return 0;

}

static int process_timezone(void) {

const char *etc_localtime, *e;

int r;

etc_localtime = prefix_roota("/etc/localtime");

if (faccessat(AT_FDCWD, etc_localtime, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

if (arg_copy_timezone && arg_root) {

_cleanup_free_ char *p = NULL;

r = readlink_malloc("/etc/localtime", &p);

if (r != -ENOENT) {

if (r < 0) {

log_error("Failed to read host timezone: %s", strerror(-r));

return r;

}

mkdir_parents(etc_localtime, 0755);

if (symlink(p, etc_localtime) < 0) {

log_error("Failed to create %s symlink: %m", etc_localtime);

return -errno;

}

log_info("%s copied.", etc_localtime);

return 0;

}

}

r = prompt_timezone();

if (r < 0)

return r;

if (isempty(arg_timezone))

return 0;

e = strappenda("../usr/share/zoneinfo/", arg_timezone);

mkdir_parents(etc_localtime, 0755);

if (symlink(e, etc_localtime) < 0) {

log_error("Failed to create %s symlink: %m", etc_localtime);

return -errno;

}

log_info("%s written", etc_localtime);

return 0;

}

static int prompt_hostname(void) {

int r;

if (arg_hostname)

return 0;

if (!arg_prompt_hostname)

return 0;

print_welcome();

putchar('\n');

for (;;) {

_cleanup_free_ char *h = NULL;

r = ask_string(&h, "%s Please enter hostname for new system (empty to skip): ", draw_special_char(DRAW_TRIANGULAR_BULLET));

if (r < 0) {

log_error("Failed to query hostname: %s", strerror(-r));

return r;

}

if (isempty(h)) {

log_warning("No hostname entered, skipping.");

break;

}

if (!hostname_is_valid(h)) {

log_error("Specified hostname invalid.");

continue;

}

arg_hostname = h;

h = NULL;

break;

}

return 0;

}

static int process_hostname(void) {

const char *etc_hostname;

int r;

etc_hostname = prefix_roota("/etc/hostname");

if (faccessat(AT_FDCWD, etc_hostname, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

r = prompt_hostname();

if (r < 0)

return r;

if (isempty(arg_hostname))

return 0;

mkdir_parents(etc_hostname, 0755);

r = write_string_file(etc_hostname, arg_hostname);

if (r < 0) {

log_error("Failed to write %s: %s", etc_hostname, strerror(-r));

return r;

}

log_info("%s written.", etc_hostname);

return 0;

}

static int process_machine_id(void) {

const char *etc_machine_id;

char id[SD_ID128_STRING_MAX];

int r;

etc_machine_id = prefix_roota("/etc/machine-id");

if (faccessat(AT_FDCWD, etc_machine_id, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

if (!arg_root)

return 0;

if (sd_id128_equal(arg_machine_id, SD_ID128_NULL))

return 0;

mkdir_parents(etc_machine_id, 0755);

r = write_string_file(etc_machine_id, sd_id128_to_string(arg_machine_id, id));

if (r < 0) {

log_error("Failed to write machine id: %s", strerror(-r));

return r;

}

log_info("%s written.", etc_machine_id);

return 0;

}

static int prompt_root_password(void) {

const char *msg1, *msg2, *etc_shadow;

int r;

if (arg_root_password)

return 0;

if (!arg_prompt_root_password)

return 0;

etc_shadow = prefix_roota("/etc/shadow");

if (faccessat(AT_FDCWD, etc_shadow, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

print_welcome();

putchar('\n');

msg1 = strappenda(draw_special_char(DRAW_TRIANGULAR_BULLET), " Please enter a new root password (empty to skip): ");

msg2 = strappenda(draw_special_char(DRAW_TRIANGULAR_BULLET), " Please enter new root password again: ");

for (;;) {

_cleanup_free_ char *a = NULL, *b = NULL;

r = ask_password_tty(msg1, 0, false, NULL, &a);

if (r < 0) {

log_error("Failed to query root password: %s", strerror(-r));

return r;

}

if (isempty(a)) {

log_warning("No password entered, skipping.");

break;

}

r = ask_password_tty(msg2, 0, false, NULL, &b);

if (r < 0) {

log_error("Failed to query root password: %s", strerror(-r));

clear_string(a);

return r;

}

if (!streq(a, b)) {

log_error("Entered passwords did not match, please try again.");

clear_string(a);

clear_string(b);

continue;

}

clear_string(b);

arg_root_password = a;

a = NULL;

break;

}

return 0;

}

static int write_root_shadow(const char *path, const struct spwd *p) {

_cleanup_fclose_ FILE *f = NULL;

assert(path);

assert(p);

RUN_WITH_UMASK(0777)

f = fopen(path, "wex");

if (!f)

return -errno;

errno = 0;

if (putspent(p, f) != 0)

return errno ? -errno : -EIO;

return fflush_and_check(f);

}

static int process_root_password(void) {

static const char table[] =

"abcdefghijklmnopqrstuvwxyz"

"ABCDEFGHIJKLMNOPQRSTUVWXYZ"

"0123456789"

"./";

struct spwd item = {

.sp_namp = (char*) "root",

.sp_min = 0,

.sp_max = 99999,

.sp_warn = 7,

.sp_inact = -1,

.sp_expire = -1,

.sp_flag = (unsigned long) -1, /* this appears to be what everybody does ... */

};

_cleanup_close_ int lock = -1;

char salt[3+16+1+1];

uint8_t raw[16];

unsigned i;

char *j;

const char *etc_shadow;

int r;

etc_shadow = prefix_roota("/etc/shadow");

if (faccessat(AT_FDCWD, etc_shadow, F_OK, AT_SYMLINK_NOFOLLOW) >= 0)

return 0;

mkdir_parents(etc_shadow, 0755);

lock = take_password_lock(arg_root);

if (lock < 0)

return lock;

if (arg_copy_root_password && arg_root) {

struct spwd *p;

errno = 0;

p = getspnam("root");

if (p || errno != ENOENT) {

if (!p) {

if (!errno)

errno = EIO;

log_error("Failed to find shadow entry for root: %m");

return -errno;

}

r = write_root_shadow(etc_shadow, p);

if (r < 0) {

log_error("Failed to write %s: %s", etc_shadow, strerror(-r));

return r;

}

log_info("%s copied.", etc_shadow);

return 0;

}

}

r = prompt_root_password();

if (r < 0)

return r;

if (!arg_root_password)

return 0;

r = dev_urandom(raw, 16);

if (r < 0) {

log_error("Failed to get salt: %s", strerror(-r));

return r;

}

/* We only bother with SHA512 hashed passwords, the rest is legacy, and we don't do legacy. */

assert_cc(sizeof(table) == 64 + 1);

j = stpcpy(salt, "$6$");

for (i = 0; i < 16; i++)

j[i] = table[raw[i] & 63];

j[i++] = '$';

j[i] = 0;

errno = 0;

item.sp_pwdp = crypt(arg_root_password, salt);

if (!item.sp_pwdp) {

if (!errno)

errno = -EINVAL;

log_error("Failed to encrypt password: %m");

return -errno;

}

item.sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY);

r = write_root_shadow(etc_shadow, &item);

if (r < 0) {

log_error("Failed to write %s: %s", etc_shadow, strerror(-r));

return r;

}

log_info("%s written.", etc_shadow);

return 0;

}

static void help(void) {

printf("%s [OPTIONS...]\n\n"

"Configures basic settings of the system.\n\n"

" -h --help Show this help\n"

" --version Show package version\n"

" --root=PATH Operate on an alternate filesystem root\n"

" --locale=LOCALE Set primary locale (LANG=)\n"

" --locale-messages=LOCALE Set message locale (LC_MESSAGES=)\n"

" --timezone=TIMEZONE Set timezone\n"

" --hostname=NAME Set host name\n"

" --machine-ID=ID Set machine ID\n"

" --root-password=PASSWORD Set root password\n"

" --root-password-file=FILE Set root password from file\n"

" --prompt-locale Prompt the user for locale settings\n"

" --prompt-timezone Prompt the user for timezone\n"

" --prompt-hostname Prompt the user for hostname\n"

" --prompt-root-password Prompt the user for root password\n"

" --prompt Prompt for locale, timezone, hostname, root password\n"

" --copy-locale Copy locale from host\n"

" --copy-timezone Copy timezone from host\n"

" --copy-root-password Copy root password from host\n"

" --copy Copy locale, timezone, root password\n"

" --setup-machine-id Generate a new random machine ID\n"

, program_invocation_short_name);

}

static int parse_argv(int argc, char *argv[]) {

enum {

ARG_VERSION = 0x100,

ARG_ROOT,

ARG_LOCALE,

ARG_LOCALE_MESSAGES,

ARG_TIMEZONE,

ARG_HOSTNAME,

ARG_MACHINE_ID,

ARG_ROOT_PASSWORD,

ARG_ROOT_PASSWORD_FILE,

ARG_PROMPT,

ARG_PROMPT_LOCALE,

ARG_PROMPT_TIMEZONE,

ARG_PROMPT_HOSTNAME,

ARG_PROMPT_ROOT_PASSWORD,

ARG_COPY,

ARG_COPY_LOCALE,

ARG_COPY_TIMEZONE,

ARG_COPY_ROOT_PASSWORD,

ARG_SETUP_MACHINE_ID,

};

static const struct option options[] = {

{ "help", no_argument, NULL, 'h' },

{ "version", no_argument, NULL, ARG_VERSION },

{ "root", required_argument, NULL, ARG_ROOT },

{ "locale", required_argument, NULL, ARG_LOCALE },

{ "locale-messages", required_argument, NULL, ARG_LOCALE_MESSAGES },

{ "timezone", required_argument, NULL, ARG_TIMEZONE },

{ "hostname", required_argument, NULL, ARG_HOSTNAME },

{ "machine-id", required_argument, NULL, ARG_MACHINE_ID },

{ "root-password", required_argument, NULL, ARG_ROOT_PASSWORD },

{ "root-password-file", required_argument, NULL, ARG_ROOT_PASSWORD_FILE },

{ "prompt", no_argument, NULL, ARG_PROMPT },

{ "prompt-locale", no_argument, NULL, ARG_PROMPT_LOCALE },

{ "prompt-timezone", no_argument, NULL, ARG_PROMPT_TIMEZONE },

{ "prompt-hostname", no_argument, NULL, ARG_PROMPT_HOSTNAME },

{ "prompt-root-password", no_argument, NULL, ARG_PROMPT_ROOT_PASSWORD },

{ "copy", no_argument, NULL, ARG_COPY },

{ "copy-locale", no_argument, NULL, ARG_COPY_LOCALE },

{ "copy-timezone", no_argument, NULL, ARG_COPY_TIMEZONE },

{ "copy-root-password", no_argument, NULL, ARG_COPY_ROOT_PASSWORD },

{ "setup-machine-id", no_argument, NULL, ARG_SETUP_MACHINE_ID },

{}

};

int r, c;

assert(argc >= 0);

assert(argv);

while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)

switch (c) {

case 'h':

help();

return 0;

case ARG_VERSION:

puts(PACKAGE_STRING);

puts(SYSTEMD_FEATURES);

return 0;

case ARG_ROOT:

free(arg_root);

arg_root = path_make_absolute_cwd(optarg);

if (!arg_root)

return log_oom();

path_kill_slashes(arg_root);

if (path_equal(arg_root, "/")) {

free(arg_root);

arg_root = NULL;

}

break;

case ARG_LOCALE:

if (!locale_is_valid(optarg)) {

log_error("Locale %s is not valid.", optarg);

return -EINVAL;

}

free(arg_locale);

arg_locale = strdup(optarg);

if (!arg_locale)

return log_oom();

break;

case ARG_LOCALE_MESSAGES:

if (!locale_is_valid(optarg)) {

log_error("Locale %s is not valid.", optarg);

return -EINVAL;

}

free(arg_locale_messages);

arg_locale_messages = strdup(optarg);

if (!arg_locale_messages)

return log_oom();

break;

case ARG_TIMEZONE:

if (!timezone_is_valid(optarg)) {

log_error("Timezone %s is not valid.", optarg);

return -EINVAL;

}

free(arg_timezone);

arg_timezone = strdup(optarg);

if (!arg_timezone)

return log_oom();

break;

case ARG_ROOT_PASSWORD:

free(arg_root_password);

arg_root_password = strdup(optarg);

if (!arg_root_password)

return log_oom();

break;

case ARG_ROOT_PASSWORD_FILE:

free(arg_root_password);

arg_root_password = NULL;

r = read_one_line_file(optarg, &arg_root_password);

if (r < 0) {

log_error("Failed to read %s: %s", optarg, strerror(-r));

return r;

}

break;

case ARG_HOSTNAME:

if (!hostname_is_valid(optarg)) {

log_error("Host name %s is not valid.", optarg);

return -EINVAL;

}

free(arg_hostname);

arg_hostname = strdup(optarg);

if (!arg_hostname)

return log_oom();

break;

case ARG_MACHINE_ID:

if (sd_id128_from_string(optarg, &arg_machine_id) < 0) {

log_error("Failed to parse machine id %s.", optarg);

return -EINVAL;

}

break;

case ARG_PROMPT:

arg_prompt_locale = arg_prompt_timezone = arg_prompt_hostname = arg_prompt_root_password = true;

break;

case ARG_PROMPT_LOCALE:

arg_prompt_locale = true;

break;

case ARG_PROMPT_TIMEZONE:

arg_prompt_timezone = true;

break;

case ARG_PROMPT_HOSTNAME:

arg_prompt_hostname = true;

break;

case ARG_PROMPT_ROOT_PASSWORD:

arg_prompt_root_password = true;

break;

case ARG_COPY:

arg_copy_locale = arg_copy_timezone = arg_copy_root_password = true;

break;

case ARG_COPY_LOCALE:

arg_copy_locale = true;

break;

case ARG_COPY_TIMEZONE:

arg_copy_timezone = true;

break;

case ARG_COPY_ROOT_PASSWORD:

arg_copy_root_password = true;

break;

case ARG_SETUP_MACHINE_ID:

r = sd_id128_randomize(&arg_machine_id);

if (r < 0) {

log_error("Failed to generate randomized machine ID: %s", strerror(-r));

return r;

}

break;

case '?':

return -EINVAL;

default:

assert_not_reached("Unhandled option");

}

return 1;

}

int main(int argc, char *argv[]) {

int r;

r = parse_argv(argc, argv);

if (r <= 0)

goto finish;

log_set_target(LOG_TARGET_AUTO);

log_parse_environment();

log_open();

umask(0022);

r = process_locale();

if (r < 0)

goto finish;

r = process_timezone();

if (r < 0)

goto finish;

r = process_hostname();

if (r < 0)

goto finish;

r = process_machine_id();

if (r < 0)

goto finish;

r = process_root_password();

if (r < 0)

goto finish;

finish:

free(arg_root);

free(arg_locale);

free(arg_locale_messages);

free(arg_timezone);

free(arg_hostname);

clear_string(arg_root_password);

free(arg_root_password);

return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;

}