diff options
Diffstat (limited to 'src/nspawn/nspawn.c')
| -rw-r--r-- | src/nspawn/nspawn.c | 52 |
1 files changed, 40 insertions, 12 deletions
diff --git a/src/nspawn/nspawn.c b/src/nspawn/nspawn.c index 0dae9984c9..e7314ac29c 100644 --- a/src/nspawn/nspawn.c +++ b/src/nspawn/nspawn.c @@ -79,6 +79,7 @@ #include "nspawn-register.h" #include "nspawn-settings.h" #include "nspawn-setuid.h" +#include "nspawn-stub-pid1.h" #include "parse-util.h" #include "path-util.h" #include "process-util.h" @@ -123,7 +124,7 @@ static const char *arg_selinux_apifs_context = NULL; static const char *arg_slice = NULL; static bool arg_private_network = false; static bool arg_read_only = false; -static bool arg_boot = false; +static StartMode arg_start_mode = START_PID1; static bool arg_ephemeral = false; static LinkJournal arg_link_journal = LINK_AUTO; static bool arg_link_journal_try = false; @@ -193,6 +194,7 @@ static void help(void) { " -x --ephemeral Run container with snapshot of root directory, and\n" " remove it after exit\n" " -i --image=PATH File system device or disk image for the container\n" + " -a --as-pid2 Maintain a stub init as PID1, invoke binary as PID2\n" " -b --boot Boot up full system (i.e. invoke init)\n" " --chdir=PATH Set working directory in the container\n" " -u --user=USER Run the command under specified user or uid\n" @@ -358,6 +360,7 @@ static int parse_argv(int argc, char *argv[]) { { "ephemeral", no_argument, NULL, 'x' }, { "user", required_argument, NULL, 'u' }, { "private-network", no_argument, NULL, ARG_PRIVATE_NETWORK }, + { "as-pid2", no_argument, NULL, 'a' }, { "boot", no_argument, NULL, 'b' }, { "uuid", required_argument, NULL, ARG_UUID }, { "read-only", no_argument, NULL, ARG_READ_ONLY }, @@ -404,7 +407,7 @@ static int parse_argv(int argc, char *argv[]) { assert(argc >= 0); assert(argv); - while ((c = getopt_long(argc, argv, "+hD:u:bL:M:jS:Z:qi:xp:n", options, NULL)) >= 0) + while ((c = getopt_long(argc, argv, "+hD:u:abL:M:jS:Z:qi:xp:n", options, NULL)) >= 0) switch (c) { @@ -495,8 +498,23 @@ static int parse_argv(int argc, char *argv[]) { break; case 'b': - arg_boot = true; - arg_settings_mask |= SETTING_BOOT; + if (arg_start_mode == START_PID2) { + log_error("--boot and --as-pid2 may not be combined."); + return -EINVAL; + } + + arg_start_mode = START_BOOT; + arg_settings_mask |= SETTING_START_MODE; + break; + + case 'a': + if (arg_start_mode == START_BOOT) { + log_error("--boot and --as-pid2 may not be combined."); + return -EINVAL; + } + + arg_start_mode = START_PID2; + arg_settings_mask |= SETTING_START_MODE; break; case ARG_UUID: @@ -876,7 +894,7 @@ static int parse_argv(int argc, char *argv[]) { if (arg_share_system) arg_register = false; - if (arg_boot && arg_share_system) { + if (arg_start_mode != START_PID1 && arg_share_system) { log_error("--boot and --share-system may not be combined."); return -EINVAL; } @@ -924,7 +942,7 @@ static int parse_argv(int argc, char *argv[]) { if (!arg_parameters) return log_oom(); - arg_settings_mask |= SETTING_BOOT; + arg_settings_mask |= SETTING_START_MODE; } /* Load all settings from .nspawn files */ @@ -960,7 +978,7 @@ static int verify_arguments(void) { return -EINVAL; } - if (arg_boot && arg_kill_signal <= 0) + if (arg_start_mode == START_BOOT && arg_kill_signal <= 0) arg_kill_signal = SIGRTMIN+3; return 0; @@ -2584,6 +2602,12 @@ static int inner_child( if (chdir(arg_chdir) < 0) return log_error_errno(errno, "Failed to change to specified working directory %s: %m", arg_chdir); + if (arg_start_mode == START_PID2) { + r = stub_pid1(); + if (r < 0) + return r; + } + /* Now, explicitly close the log, so that we * then can close all remaining fds. Closing * the log explicitly first has the benefit @@ -2595,7 +2619,7 @@ static int inner_child( log_close(); (void) fdset_close_others(fds); - if (arg_boot) { + if (arg_start_mode == START_BOOT) { char **a; size_t m; @@ -2917,9 +2941,9 @@ static int load_settings(void) { /* Copy over bits from the settings, unless they have been * explicitly masked by command line switches. */ - if ((arg_settings_mask & SETTING_BOOT) == 0 && - settings->boot >= 0) { - arg_boot = settings->boot; + if ((arg_settings_mask & SETTING_START_MODE) == 0 && + settings->start_mode >= 0) { + arg_start_mode = settings->start_mode; strv_free(arg_parameters); arg_parameters = settings->parameters; @@ -3074,6 +3098,10 @@ int main(int argc, char *argv[]) { log_parse_environment(); log_open(); + /* Make sure rename_process() in the stub init process can work */ + saved_argv = argv; + saved_argc = argc; + r = parse_argv(argc, argv); if (r <= 0) goto finish; @@ -3180,7 +3208,7 @@ int main(int argc, char *argv[]) { } } - if (arg_boot) { + if (arg_start_mode == START_BOOT) { if (path_is_os_tree(arg_directory) <= 0) { log_error("Directory %s doesn't look like an OS root directory (os-release file is missing). Refusing.", arg_directory); r = -EINVAL; |