X-Git-Url: http://git.ipfire.org/?p=thirdparty%2Fsystemd.git;a=blobdiff_plain;f=src%2Ffirstboot%2Ffirstboot.c;h=a3f442518ec43d207c8290523e2716a33f5cb1b5;hp=0c3ef3e2a7ec3d4d4a1b2a60977b6f8cb3f7f426;hb=f649325ba73a7165a14c1f1134b30b12a96d3718;hpb=63ef9d31fd4eed77bfe85993a60d0617f581edd5 diff --git a/src/firstboot/firstboot.c b/src/firstboot/firstboot.c index 0c3ef3e2a7e..a3f442518ec 100644 --- a/src/firstboot/firstboot.c +++ b/src/firstboot/firstboot.c @@ -2,6 +2,7 @@ #include #include +#include #include #include "sd-id128.h" @@ -9,6 +10,7 @@ #include "alloc-util.h" #include "ask-password-api.h" #include "copy.h" +#include "dissect-image.h" #include "env-file.h" #include "fd-util.h" #include "fileio.h" @@ -17,9 +19,12 @@ #include "kbd-util.h" #include "libcrypt-util.h" #include "locale-util.h" +#include "loop-util.h" #include "main-func.h" #include "memory-util.h" #include "mkdir.h" +#include "mount-util.h" +#include "namespace-util.h" #include "os-util.h" #include "parse-util.h" #include "path-util.h" @@ -31,10 +36,12 @@ #include "terminal-util.h" #include "time-util.h" #include "tmpfile-util-label.h" +#include "tmpfile-util.h" #include "umask-util.h" #include "user-util.h" static char *arg_root = NULL; +static char *arg_image = NULL; static char *arg_locale = NULL; /* $LANG */ static char *arg_keymap = NULL; static char *arg_locale_messages = NULL; /* $LC_MESSAGES */ @@ -42,21 +49,26 @@ static char *arg_timezone = NULL; static char *arg_hostname = NULL; static sd_id128_t arg_machine_id = {}; static char *arg_root_password = NULL; +static char *arg_root_shell = NULL; static char *arg_kernel_cmdline = NULL; static bool arg_prompt_locale = false; static bool arg_prompt_keymap = false; static bool arg_prompt_timezone = false; static bool arg_prompt_hostname = false; static bool arg_prompt_root_password = false; +static bool arg_prompt_root_shell = false; static bool arg_copy_locale = false; static bool arg_copy_keymap = false; static bool arg_copy_timezone = false; static bool arg_copy_root_password = false; +static bool arg_copy_root_shell = false; static bool arg_force = false; static bool arg_delete_root_password = false; static bool arg_root_password_is_hashed = false; +static bool arg_welcome = true; STATIC_DESTRUCTOR_REGISTER(arg_root, freep); +STATIC_DESTRUCTOR_REGISTER(arg_image, freep); STATIC_DESTRUCTOR_REGISTER(arg_locale, freep); STATIC_DESTRUCTOR_REGISTER(arg_locale_messages, freep); STATIC_DESTRUCTOR_REGISTER(arg_keymap, freep); @@ -85,6 +97,9 @@ static void print_welcome(void) { const char *pn; int r; + if (!arg_welcome) + return; + if (done) return; @@ -589,11 +604,63 @@ static int prompt_root_password(void) { return 0; } -static int write_root_passwd(const char *passwd_path, const char *password) { +static int find_shell(const char *path, const char *root) { + int r; + + assert(path); + + if (!valid_shell(path)) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "%s is not a valid shell", path); + + r = chase_symlinks(path, root, CHASE_PREFIX_ROOT, NULL, NULL); + if (r < 0) { + const char *p; + p = prefix_roota(root, path); + return log_error_errno(r, "Failed to resolve shell %s: %m", p); + } + + return 0; +} + +static int prompt_root_shell(void) { + int r; + + if (arg_root_shell || !arg_prompt_root_shell) + return 0; + + print_welcome(); + putchar('\n'); + + for (;;) { + _cleanup_free_ char *s = NULL; + + r = ask_string(&s, "%s Please enter root shell for new system (empty to skip): ", special_glyph(SPECIAL_GLYPH_TRIANGULAR_BULLET)); + if (r < 0) + return log_error_errno(r, "Failed to query root shell: %m"); + + if (isempty(s)) { + log_warning("No shell entered, skipping."); + break; + } + + r = find_shell(s, arg_root); + if (r < 0) + continue; + + arg_root_shell = TAKE_PTR(s); + break; + } + + return 0; +} + +static int write_root_passwd(const char *passwd_path, const char *password, const char *shell) { _cleanup_fclose_ FILE *original = NULL, *passwd = NULL; _cleanup_(unlink_and_freep) char *passwd_tmp = NULL; int r; + assert(password); + r = fopen_temporary_label("/etc/passwd", passwd_path, &passwd, &passwd_tmp); if (r < 0) return r; @@ -608,8 +675,11 @@ static int write_root_passwd(const char *passwd_path, const char *password) { while ((r = fgetpwent_sane(original, &i)) > 0) { - if (streq(i->pw_name, "root")) + if (streq(i->pw_name, "root")) { i->pw_passwd = (char *) password; + if (shell) + i->pw_shell = (char *) shell; + } r = putpwent_sane(i, passwd); if (r < 0) @@ -626,13 +696,13 @@ static int write_root_passwd(const char *passwd_path, const char *password) { .pw_gid = 0, .pw_gecos = (char *) "Super User", .pw_dir = (char *) "/root", - .pw_shell = (char *) "/bin/sh", + .pw_shell = (char *) (shell ?: "/bin/sh"), }; if (errno != ENOENT) return -errno; - r = fchmod(fileno(passwd), 0000); + r = fchmod(fileno(passwd), 0644); if (r < 0) return -errno; @@ -657,6 +727,8 @@ static int write_root_shadow(const char *shadow_path, const char *hashed_passwor _cleanup_(unlink_and_freep) char *shadow_tmp = NULL; int r; + assert(hashed_password); + r = fopen_temporary_label("/etc/shadow", shadow_path, &shadow, &shadow_tmp); if (r < 0) return r; @@ -719,73 +791,73 @@ static int write_root_shadow(const char *shadow_path, const char *hashed_passwor return 0; } -static int process_root_password(void) { +static int process_root_args(void) { _cleanup_close_ int lock = -1; struct crypt_data cd = {}; - const char *hashed_password; - const char *etc_shadow; + const char *password, *hashed_password; + const char *etc_passwd, *etc_shadow; int r; + etc_passwd = prefix_roota(arg_root, "/etc/passwd"); etc_shadow = prefix_roota(arg_root, "/etc/shadow"); - if (laccess(etc_shadow, F_OK) >= 0 && !arg_force) + + /* We only mess with passwd and shadow if both do not exist or --force is specified. These files are + * tightly coupled and hence we make sure we have permission from the user to create/modify both + * files. */ + if ((laccess(etc_passwd, F_OK) >= 0 || laccess(etc_shadow, F_OK) >= 0) && !arg_force) return 0; - (void) mkdir_parents(etc_shadow, 0755); + (void) mkdir_parents(etc_passwd, 0755); lock = take_etc_passwd_lock(arg_root); if (lock < 0) - return log_error_errno(lock, "Failed to take a lock: %m"); + return log_error_errno(lock, "Failed to take a lock on %s: %m", etc_passwd); - if (arg_delete_root_password) { - const char *etc_passwd; + if (arg_copy_root_shell && arg_root) { + struct passwd *p; - /* Mixing alloca() and other stuff that touches the stack in one expression is not portable. */ - etc_passwd = prefix_roota(arg_root, "/etc/passwd"); + errno = 0; + p = getpwnam("root"); + if (!p) + return log_error_errno(errno_or_else(EIO), "Failed to find passwd entry for root: %m"); - r = write_root_passwd(etc_passwd, ""); + r = free_and_strdup(&arg_root_shell, p->pw_shell); if (r < 0) - return log_error_errno(r, "Failed to write %s: %m", etc_passwd); - - log_info("%s written", etc_passwd); - - return 0; + return log_oom(); } + r = prompt_root_shell(); + if (r < 0) + return r; + 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; + if (!p) + return log_error_errno(errno_or_else(EIO), "Failed to find shadow entry for root: %m"); - return log_error_errno(errno, "Failed to find shadow entry for root: %m"); - } - - r = write_root_shadow(etc_shadow, p->sp_pwdp); - if (r < 0) - return log_error_errno(r, "Failed to write %s: %m", etc_shadow); + r = free_and_strdup(&arg_root_password, p->sp_pwdp); + if (r < 0) + return log_oom(); - log_info("%s copied.", etc_shadow); - return 0; - } + arg_root_password_is_hashed = true; } r = prompt_root_password(); if (r < 0) return r; - if (!arg_root_password) - return 0; - - if (arg_root_password_is_hashed) + if (arg_root_password && arg_root_password_is_hashed) { + password = "x"; hashed_password = arg_root_password; - else { + } else if (arg_root_password) { _cleanup_free_ char *salt = NULL; /* hashed_password points inside cd after crypt_r returns so cd has function scope. */ + password = "x"; + r = make_salt(&salt); if (r < 0) return log_error_errno(r, "Failed to get salt: %m"); @@ -795,7 +867,16 @@ static int process_root_password(void) { if (!hashed_password) return log_error_errno(errno == 0 ? SYNTHETIC_ERRNO(EINVAL) : errno, "Failed to encrypt password: %m"); - } + } else if (arg_delete_root_password) + password = hashed_password = ""; + else + password = hashed_password = "!"; + + r = write_root_passwd(etc_passwd, password, arg_root_shell); + if (r < 0) + return log_error_errno(r, "Failed to write %s: %m", etc_passwd); + + log_info("%s written", etc_passwd); r = write_root_shadow(etc_shadow, hashed_password); if (r < 0) @@ -826,6 +907,75 @@ static int process_kernel_cmdline(void) { return 0; } +static int setup_image(char **ret_mount_dir, LoopDevice **ret_loop_device, DecryptedImage **ret_decrypted_image) { + DissectImageFlags f = DISSECT_IMAGE_REQUIRE_ROOT|DISSECT_IMAGE_VALIDATE_OS|DISSECT_IMAGE_RELAX_VAR_CHECK|DISSECT_IMAGE_FSCK; + _cleanup_(loop_device_unrefp) LoopDevice *d = NULL; + _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; + _cleanup_(dissected_image_unrefp) DissectedImage *dissected_image = NULL; + _cleanup_(rmdir_and_freep) char *mount_dir = NULL; + _cleanup_free_ char *temp = NULL; + int r; + + if (!arg_image) { + *ret_mount_dir = NULL; + *ret_decrypted_image = NULL; + *ret_loop_device = NULL; + return 0; + } + + assert(!arg_root); + + r = tempfn_random_child(NULL, "firstboot", &temp); + if (r < 0) + return log_error_errno(r, "Failed to generate temporary mount directory: %m"); + + r = loop_device_make_by_path(arg_image, O_RDWR, LO_FLAGS_PARTSCAN, &d); + if (r < 0) + return log_error_errno(r, "Failed to set up loopback device: %m"); + + r = dissect_image_and_warn(d->fd, arg_image, NULL, 0, NULL, f, &dissected_image); + if (r < 0) + return r; + + r = dissected_image_decrypt_interactively(dissected_image, NULL, NULL, 0, NULL, NULL, NULL, 0, f, &decrypted_image); + if (r < 0) + return r; + + r = detach_mount_namespace(); + if (r < 0) + return log_error_errno(r, "Failed to detach mount namespace: %m"); + + mount_dir = strdup(temp); + if (!mount_dir) + return log_oom(); + + r = mkdir_p(mount_dir, 0700); + if (r < 0) { + mount_dir = mfree(mount_dir); + return log_error_errno(r, "Failed to create mount point: %m"); + } + + r = dissected_image_mount(dissected_image, mount_dir, UID_INVALID, f); + if (r < 0) + return log_error_errno(r, "Failed to mount image: %m"); + + if (decrypted_image) { + r = decrypted_image_relinquish(decrypted_image); + if (r < 0) + return log_error_errno(r, "Failed to relinquish DM devices: %m"); + } + + loop_device_relinquish(d); + + arg_root = TAKE_PTR(temp); + + *ret_mount_dir = TAKE_PTR(mount_dir); + *ret_decrypted_image = TAKE_PTR(decrypted_image); + *ret_loop_device = TAKE_PTR(d); + + return 1; +} + static int help(void) { _cleanup_free_ char *link = NULL; int r; @@ -839,6 +989,7 @@ static int help(void) { " -h --help Show this help\n" " --version Show package version\n" " --root=PATH Operate on an alternate filesystem root\n" + " --image=PATH Operate on an alternate filesystem image\n" " --locale=LOCALE Set primary locale (LANG=)\n" " --locale-messages=LOCALE Set message locale (LC_MESSAGES=)\n" " --keymap=KEYMAP Set keymap\n" @@ -848,20 +999,24 @@ static int help(void) { " --root-password=PASSWORD Set root password from plaintext password\n" " --root-password-file=FILE Set root password from file\n" " --root-password-hashed=HASHED_PASSWORD Set root password from hashed password\n" + " --root-shell=SHELL Set root shell\n" " --prompt-locale Prompt the user for locale settings\n" " --prompt-keymap Prompt the user for keymap 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-root-shell Prompt the user for root shell\n" " --prompt Prompt for all of the above\n" " --copy-locale Copy locale from host\n" " --copy-keymap Copy keymap from host\n" " --copy-timezone Copy timezone from host\n" " --copy-root-password Copy root password from host\n" + " --copy-root-shell Copy root shell from host\n" " --copy Copy locale, keymap, timezone, root password\n" " --setup-machine-id Generate a new random machine ID\n" " --force Overwrite existing files\n" " --delete-root-password Delete root password\n" + " --welcome=no Disable the welcome text\n" "\nSee the %s for details.\n" , program_invocation_short_name , link @@ -875,6 +1030,7 @@ static int parse_argv(int argc, char *argv[]) { enum { ARG_VERSION = 0x100, ARG_ROOT, + ARG_IMAGE, ARG_LOCALE, ARG_LOCALE_MESSAGES, ARG_KEYMAP, @@ -884,6 +1040,7 @@ static int parse_argv(int argc, char *argv[]) { ARG_ROOT_PASSWORD, ARG_ROOT_PASSWORD_FILE, ARG_ROOT_PASSWORD_HASHED, + ARG_ROOT_SHELL, ARG_KERNEL_COMMAND_LINE, ARG_PROMPT, ARG_PROMPT_LOCALE, @@ -891,20 +1048,24 @@ static int parse_argv(int argc, char *argv[]) { ARG_PROMPT_TIMEZONE, ARG_PROMPT_HOSTNAME, ARG_PROMPT_ROOT_PASSWORD, + ARG_PROMPT_ROOT_SHELL, ARG_COPY, ARG_COPY_LOCALE, ARG_COPY_KEYMAP, ARG_COPY_TIMEZONE, ARG_COPY_ROOT_PASSWORD, + ARG_COPY_ROOT_SHELL, ARG_SETUP_MACHINE_ID, ARG_FORCE, ARG_DELETE_ROOT_PASSWORD, + ARG_WELCOME, }; static const struct option options[] = { { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, ARG_VERSION }, { "root", required_argument, NULL, ARG_ROOT }, + { "image", required_argument, NULL, ARG_IMAGE }, { "locale", required_argument, NULL, ARG_LOCALE }, { "locale-messages", required_argument, NULL, ARG_LOCALE_MESSAGES }, { "keymap", required_argument, NULL, ARG_KEYMAP }, @@ -914,6 +1075,7 @@ static int parse_argv(int argc, char *argv[]) { { "root-password", required_argument, NULL, ARG_ROOT_PASSWORD }, { "root-password-file", required_argument, NULL, ARG_ROOT_PASSWORD_FILE }, { "root-password-hashed", required_argument, NULL, ARG_ROOT_PASSWORD_HASHED }, + { "root-shell", required_argument, NULL, ARG_ROOT_SHELL }, { "kernel-command-line", required_argument, NULL, ARG_KERNEL_COMMAND_LINE }, { "prompt", no_argument, NULL, ARG_PROMPT }, { "prompt-locale", no_argument, NULL, ARG_PROMPT_LOCALE }, @@ -921,14 +1083,17 @@ static int parse_argv(int argc, char *argv[]) { { "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 }, + { "prompt-root-shell", no_argument, NULL, ARG_PROMPT_ROOT_SHELL }, { "copy", no_argument, NULL, ARG_COPY }, { "copy-locale", no_argument, NULL, ARG_COPY_LOCALE }, { "copy-keymap", no_argument, NULL, ARG_COPY_KEYMAP }, { "copy-timezone", no_argument, NULL, ARG_COPY_TIMEZONE }, { "copy-root-password", no_argument, NULL, ARG_COPY_ROOT_PASSWORD }, + { "copy-root-shell", no_argument, NULL, ARG_COPY_ROOT_SHELL }, { "setup-machine-id", no_argument, NULL, ARG_SETUP_MACHINE_ID }, { "force", no_argument, NULL, ARG_FORCE }, { "delete-root-password", no_argument, NULL, ARG_DELETE_ROOT_PASSWORD }, + { "welcome", required_argument, NULL, ARG_WELCOME }, {} }; @@ -953,6 +1118,12 @@ static int parse_argv(int argc, char *argv[]) { return r; break; + case ARG_IMAGE: + r = parse_path_argument_and_warn(optarg, false, &arg_image); + if (r < 0) + return r; + break; + case ARG_LOCALE: r = free_and_strdup(&arg_locale, optarg); if (r < 0) @@ -1015,6 +1186,17 @@ static int parse_argv(int argc, char *argv[]) { arg_root_password_is_hashed = true; break; + case ARG_ROOT_SHELL: + r = find_shell(optarg, arg_root); + if (r < 0) + return r; + + r = free_and_strdup(&arg_root_shell, optarg); + if (r < 0) + return log_oom(); + + break; + case ARG_HOSTNAME: if (!hostname_is_valid(optarg, true)) return log_error_errno(SYNTHETIC_ERRNO(EINVAL), @@ -1042,7 +1224,8 @@ static int parse_argv(int argc, char *argv[]) { break; case ARG_PROMPT: - arg_prompt_locale = arg_prompt_keymap = arg_prompt_timezone = arg_prompt_hostname = arg_prompt_root_password = true; + arg_prompt_locale = arg_prompt_keymap = arg_prompt_timezone = arg_prompt_hostname = + arg_prompt_root_password = arg_prompt_root_shell = true; break; case ARG_PROMPT_LOCALE: @@ -1065,8 +1248,13 @@ static int parse_argv(int argc, char *argv[]) { arg_prompt_root_password = true; break; + case ARG_PROMPT_ROOT_SHELL: + arg_prompt_root_shell = true; + break; + case ARG_COPY: - arg_copy_locale = arg_copy_keymap = arg_copy_timezone = arg_copy_root_password = true; + arg_copy_locale = arg_copy_keymap = arg_copy_timezone = arg_copy_root_password = + arg_copy_root_shell = true; break; case ARG_COPY_LOCALE: @@ -1085,8 +1273,11 @@ static int parse_argv(int argc, char *argv[]) { arg_copy_root_password = true; break; - case ARG_SETUP_MACHINE_ID: + case ARG_COPY_ROOT_SHELL: + arg_copy_root_shell = 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"); @@ -1101,6 +1292,14 @@ static int parse_argv(int argc, char *argv[]) { arg_delete_root_password = true; break; + case ARG_WELCOME: + r = parse_boolean(optarg); + if (r < 0) + return log_error_errno(r, "Failed to parse --welcome= argument: %s", optarg); + + arg_welcome = r; + break; + case '?': return -EINVAL; @@ -1120,11 +1319,16 @@ static int parse_argv(int argc, char *argv[]) { return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "--delete-root-password cannot be combined with other root password options"); + if (arg_image && arg_root) + return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Please specify either --root= or --image=, the combination of both is not supported."); + return 1; } static int run(int argc, char *argv[]) { - bool enabled; + _cleanup_(loop_device_unrefp) LoopDevice *loop_device = NULL; + _cleanup_(decrypted_image_unrefp) DecryptedImage *decrypted_image = NULL; + _cleanup_(umount_and_rmdir_and_freep) char *unlink_dir = NULL; int r; r = parse_argv(argc, argv); @@ -1135,11 +1339,23 @@ static int run(int argc, char *argv[]) { umask(0022); - r = proc_cmdline_get_bool("systemd.firstboot", &enabled); + if (!arg_root && !arg_image) { + bool enabled; + + /* If we are called without --root=/--image= let's honour the systemd.firstboot kernel + * command line option, because we are called to provision the host with basic settings (as + * opposed to some other file system tree/image) */ + + r = proc_cmdline_get_bool("systemd.firstboot", &enabled); + if (r < 0) + return log_error_errno(r, "Failed to parse systemd.firstboot= kernel command line argument, ignoring: %m"); + if (r > 0 && !enabled) + return 0; /* disabled */ + } + + r = setup_image(&unlink_dir, &loop_device, &decrypted_image); if (r < 0) - return log_error_errno(r, "Failed to parse systemd.firstboot= kernel command line argument, ignoring: %m"); - if (r > 0 && !enabled) - return 0; /* disabled */ + return r; r = process_locale(); if (r < 0) @@ -1161,7 +1377,7 @@ static int run(int argc, char *argv[]) { if (r < 0) return r; - r = process_root_password(); + r = process_root_args(); if (r < 0) return r;