diff options
Diffstat (limited to 'src/grp-initprogs/systemd-firstboot/firstboot.c')
-rw-r--r-- | src/grp-initprogs/systemd-firstboot/firstboot.c | 870 |
1 files changed, 870 insertions, 0 deletions
diff --git a/src/grp-initprogs/systemd-firstboot/firstboot.c b/src/grp-initprogs/systemd-firstboot/firstboot.c new file mode 100644 index 0000000000..7308e108e8 --- /dev/null +++ b/src/grp-initprogs/systemd-firstboot/firstboot.c @@ -0,0 +1,870 @@ +/*** + This file is part of systemd. + + Copyright 2014 Lennart Poettering + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd 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 + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <fcntl.h> +#include <getopt.h> +#include <shadow.h> +#include <unistd.h> + +#include "basic/alloc-util.h" +#include "basic/copy.h" +#include "basic/fd-util.h" +#include "basic/fileio.h" +#include "basic/fs-util.h" +#include "basic/hostname-util.h" +#include "basic/locale-util.h" +#include "basic/mkdir.h" +#include "basic/parse-util.h" +#include "basic/path-util.h" +#include "basic/random-util.h" +#include "basic/string-util.h" +#include "basic/strv.h" +#include "basic/terminal-util.h" +#include "basic/time-util.h" +#include "basic/umask-util.h" +#include "basic/user-util.h" +#include "shared/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; + +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(arg_root, "/etc/os-release"); + r = parse_env_file(os_release, NEWLINE, + "PRETTY_NAME", &pretty_name, + NULL); + if (r == -ENOENT) { + + os_release = prefix_roota(arg_root, "/usr/lib/os-release"); + r = parse_env_file(os_release, NEWLINE, + "PRETTY_NAME", &pretty_name, + NULL); + } + + if (r < 0 && r != -ENOENT) + log_warning_errno(r, "Failed to read os-release file: %m"); + + printf("\nWelcome to your new installation of %s!\nPlease configure a few basic system settings:\n\n", + isempty(pretty_name) ? "GNU/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 + * a title */ + 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): ", special_glyph(TRIANGULAR_BULLET), text); + if (r < 0) + return log_error_errno(r, "Failed to query user: %m"); + + 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) + return log_error_errno(r, "Cannot query locales list: %m"); + + 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(arg_root, "/etc/locale.conf"); + if (laccess(etc_localeconf, F_OK) >= 0) + return 0; + + if (arg_copy_locale && arg_root) { + + mkdir_parents(etc_localeconf, 0755); + r = copy_file("/etc/locale.conf", etc_localeconf, 0, 0644, 0); + if (r != -ENOENT) { + if (r < 0) + return log_error_errno(r, "Failed to copy %s: %m", etc_localeconf); + + log_info("%s copied.", etc_localeconf); + return 0; + } + } + + r = prompt_locale(); + if (r < 0) + return r; + + if (!isempty(arg_locale)) + locales[i++] = strjoina("LANG=", arg_locale); + if (!isempty(arg_locale_messages) && !streq(arg_locale_messages, arg_locale)) + locales[i++] = strjoina("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) + return log_error_errno(r, "Failed to write %s: %m", etc_localeconf); + + 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) + return log_error_errno(r, "Cannot query timezone list: %m"); + + 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(arg_root, "/etc/localtime"); + if (laccess(etc_localtime, F_OK) >= 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) + return log_error_errno(r, "Failed to read host timezone: %m"); + + mkdir_parents(etc_localtime, 0755); + if (symlink(p, etc_localtime) < 0) + return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime); + + log_info("%s copied.", etc_localtime); + return 0; + } + } + + r = prompt_timezone(); + if (r < 0) + return r; + + if (isempty(arg_timezone)) + return 0; + + e = strjoina("../usr/share/zoneinfo/", arg_timezone); + + mkdir_parents(etc_localtime, 0755); + if (symlink(e, etc_localtime) < 0) + return log_error_errno(errno, "Failed to create %s symlink: %m", etc_localtime); + + 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): ", special_glyph(TRIANGULAR_BULLET)); + if (r < 0) + return log_error_errno(r, "Failed to query hostname: %m"); + + if (isempty(h)) { + log_warning("No hostname entered, skipping."); + break; + } + + if (!hostname_is_valid(h, true)) { + log_error("Specified hostname invalid."); + continue; + } + + /* Get rid of the trailing dot that we allow, but don't want to see */ + arg_hostname = hostname_cleanup(h); + h = NULL; + break; + } + + return 0; +} + +static int process_hostname(void) { + const char *etc_hostname; + int r; + + etc_hostname = prefix_roota(arg_root, "/etc/hostname"); + if (laccess(etc_hostname, F_OK) >= 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, WRITE_STRING_FILE_CREATE); + if (r < 0) + return log_error_errno(r, "Failed to write %s: %m", etc_hostname); + + 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(arg_root, "/etc/machine-id"); + if (laccess(etc_machine_id, F_OK) >= 0) + return 0; + + if (sd_id128_is_null(arg_machine_id)) + return 0; + + mkdir_parents(etc_machine_id, 0755); + r = write_string_file(etc_machine_id, sd_id128_to_string(arg_machine_id, id), WRITE_STRING_FILE_CREATE); + if (r < 0) + return log_error_errno(r, "Failed to write machine id: %m"); + + 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(arg_root, "/etc/shadow"); + if (laccess(etc_shadow, F_OK) >= 0) + return 0; + + print_welcome(); + putchar('\n'); + + msg1 = strjoina(special_glyph(TRIANGULAR_BULLET), " Please enter a new root password (empty to skip): "); + msg2 = strjoina(special_glyph(TRIANGULAR_BULLET), " Please enter new root password again: "); + + for (;;) { + _cleanup_string_free_erase_ char *a = NULL, *b = NULL; + + r = ask_password_tty(msg1, NULL, 0, 0, NULL, &a); + if (r < 0) + return log_error_errno(r, "Failed to query root password: %m"); + + if (isempty(a)) { + log_warning("No password entered, skipping."); + break; + } + + r = ask_password_tty(msg2, NULL, 0, 0, NULL, &b); + if (r < 0) + return log_error_errno(r, "Failed to query root password: %m"); + + if (!streq(a, b)) { + log_error("Entered passwords did not match, please try again."); + continue; + } + + 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 > 0 ? -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 = -1, + .sp_max = -1, + .sp_warn = -1, + .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(arg_root, "/etc/shadow"); + if (laccess(etc_shadow, F_OK) >= 0) + return 0; + + mkdir_parents(etc_shadow, 0755); + + lock = take_etc_passwd_lock(arg_root); + if (lock < 0) + return log_error_errno(lock, "Failed to take a lock: %m"); + + 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; + + return log_error_errno(errno, "Failed to find shadow entry for root: %m"); + } + + r = write_root_shadow(etc_shadow, p); + if (r < 0) + return log_error_errno(r, "Failed to write %s: %m", etc_shadow); + + 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) + return log_error_errno(r, "Failed to get salt: %m"); + + /* 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; + + return log_error_errno(errno, "Failed to encrypt password: %m"); + } + + item.sp_lstchg = (long) (now(CLOCK_REALTIME) / USEC_PER_DAY); + + r = write_root_shadow(etc_shadow, &item); + if (r < 0) + return log_error_errno(r, "Failed to write %s: %m", etc_shadow); + + 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 all of the above\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: + return version(); + + case ARG_ROOT: + r = parse_path_argument_and_warn(optarg, true, &arg_root); + if (r < 0) + return r; + break; + + case ARG_LOCALE: + if (!locale_is_valid(optarg)) { + log_error("Locale %s is not valid.", optarg); + return -EINVAL; + } + + r = free_and_strdup(&arg_locale, optarg); + if (r < 0) + return log_oom(); + + break; + + case ARG_LOCALE_MESSAGES: + if (!locale_is_valid(optarg)) { + log_error("Locale %s is not valid.", optarg); + return -EINVAL; + } + + r = free_and_strdup(&arg_locale_messages, optarg); + if (r < 0) + return log_oom(); + + break; + + case ARG_TIMEZONE: + if (!timezone_is_valid(optarg)) { + log_error("Timezone %s is not valid.", optarg); + return -EINVAL; + } + + r = free_and_strdup(&arg_timezone, optarg); + if (r < 0) + return log_oom(); + + break; + + case ARG_ROOT_PASSWORD: + r = free_and_strdup(&arg_root_password, optarg); + if (r < 0) + return log_oom(); + break; + + case ARG_ROOT_PASSWORD_FILE: + arg_root_password = mfree(arg_root_password); + + r = read_one_line_file(optarg, &arg_root_password); + if (r < 0) + return log_error_errno(r, "Failed to read %s: %m", optarg); + + break; + + case ARG_HOSTNAME: + if (!hostname_is_valid(optarg, true)) { + log_error("Host name %s is not valid.", optarg); + return -EINVAL; + } + + hostname_cleanup(optarg); + r = free_and_strdup(&arg_hostname, optarg); + if (r < 0) + 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) + return log_error_errno(r, "Failed to generate randomized machine ID: %m"); + + 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); + string_erase(arg_root_password); + free(arg_root_password); + + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +} |