firstboot: add new component to query basic system settings on first boot, or when creating OS images offline

A new tool "systemd-firstboot" can be used either interactively on boot,
where it will query basic locale, timezone, hostname, root password
information and set it. Or it can be used non-interactively from the
command line when prepareing disk images for booting. When used
non-inertactively the tool can either copy settings from the host, or
take settings on the command line.

$ systemd-firstboot --root=/path/to/my/new/root --copy-locale --copy-root-password --hostname=waldi

The tool will be automatically invoked (interactively) now on first boot
if /etc is found unpopulated.

This also creates the infrastructure for generators to be notified via
an environment variable whether they are running on the first boot, or
not.

5 files changed, 15 insertions, 3 deletions

diff --git a/src/core/execute.c b/src/core/execute.c
index 88d094e8cc..6e76bd5b50 100644
--- a/src/core/execute.c
+++ b/src/core/execute.c
@@ -571,7 +571,7 @@ static int ask_for_confirmation(char *response, char **argv) {
         if (!line)
                 return -ENOMEM;
 
-        r = ask(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
+        r = ask_char(response, "yns", "Execute %s? [Yes, No, Skip] ", line);
 
         restore_confirm_stdio(&saved_stdin, &saved_stdout);
 
diff --git a/src/core/main.c b/src/core/main.c
index a732c6945a..e1fc3f3718 100644
--- a/src/core/main.c
+++ b/src/core/main.c
@@ -1648,6 +1648,7 @@ int main(int argc, char *argv[]) {
         m->initrd_timestamp = initrd_timestamp;
         m->security_start_timestamp = security_start_timestamp;
         m->security_finish_timestamp = security_finish_timestamp;
+        m->is_first_boot = empty_etc;
 
         manager_set_default_rlimits(m, arg_default_rlimit);
         manager_environment_add(m, NULL, arg_default_environment);
diff --git a/src/core/manager.c b/src/core/manager.c
index 0cb2044325..9d078c0af7 100644
--- a/src/core/manager.c
+++ b/src/core/manager.c
@@ -2476,6 +2476,9 @@ void manager_check_finished(Manager *m) {
         /* Turn off confirm spawn now */
         m->confirm_spawn = false;
 
+        /* This is no longer the first boot */
+        m->is_first_boot = false;
+
         if (dual_timestamp_is_set(&m->finish_timestamp))
                 return;
 
@@ -2628,6 +2631,7 @@ void manager_run_generators(Manager *m) {
         _cleanup_closedir_ DIR *d = NULL;
         const char *generator_path;
         const char *argv[5];
+        const char *env[2];
         int r;
 
         assert(m);
@@ -2661,8 +2665,14 @@ void manager_run_generators(Manager *m) {
         argv[3] = m->generator_unit_path_late;
         argv[4] = NULL;
 
+        if (m->is_first_boot) {
+                env[0] = (char*) "SYSTEMD_FIRST_BOOT=1";
+                env[1] = NULL;
+        } else
+                env[0] = NULL;
+
         RUN_WITH_UMASK(0022)
-                execute_directory(generator_path, d, DEFAULT_TIMEOUT_USEC, (char**) argv);
+                execute_directory(generator_path, d, DEFAULT_TIMEOUT_USEC, (char**) argv, (char**) env);
 
 finish:
         trim_generator_dir(m, &m->generator_unit_path);
diff --git a/src/core/manager.h b/src/core/manager.h
index f2c1b0d227..eff639d1b6 100644
--- a/src/core/manager.h
+++ b/src/core/manager.h
@@ -243,6 +243,7 @@ struct Manager {
         bool default_cpu_accounting;
         bool default_memory_accounting;
         bool default_blockio_accounting;
+        bool is_first_boot;
 
         usec_t default_timer_accuracy_usec;
 
diff --git a/src/core/shutdown.c b/src/core/shutdown.c
index fde3ce9c27..e7771c968e 100644
--- a/src/core/shutdown.c
+++ b/src/core/shutdown.c
@@ -375,7 +375,7 @@ int main(int argc, char *argv[]) {
         arguments[0] = NULL;
         arguments[1] = arg_verb;
         arguments[2] = NULL;
-        execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, DEFAULT_TIMEOUT_USEC, arguments);
+        execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, DEFAULT_TIMEOUT_USEC, arguments, NULL);
 
         if (!in_container && !in_initrd() &&
             access("/run/initramfs/shutdown", X_OK) == 0) {