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systemd/src/run/run.c

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <getopt.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include "sd-bus.h"
#include "sd-event.h"
#include "sd-json.h"
#include "alloc-util.h"
#include "build.h"
#include "bus-error.h"
#include "bus-locator.h"
#include "bus-map-properties.h"
#include "bus-message-util.h"
#include "bus-unit-util.h"
#include "bus-wait-for-jobs.h"
#include "calendarspec.h"
#include "capsule-util.h"
#include "chase.h"
#include "env-util.h"
#include "escape.h"
#include "event-util.h"
#include "exec-util.h"
#include "exit-status.h"
#include "fd-util.h"
#include "format-util.h"
#include "fs-util.h"
#include "hostname-util.h"
#include "main-func.h"
#include "parse-argument.h"
#include "parse-util.h"
#include "path-util.h"
#include "polkit-agent.h"
#include "pretty-print.h"
#include "process-util.h"
#include "ptyfwd.h"
#include "signal-util.h"
#include "special.h"
#include "strv.h"
#include "terminal-util.h"
#include "uid-classification.h"
#include "unit-def.h"
#include "unit-name.h"
#include "user-util.h"
static bool arg_ask_password = true;
static bool arg_scope = false;
static bool arg_remain_after_exit = false;
static bool arg_no_block = false;
static bool arg_wait = false;
static const char *arg_unit = NULL;
static char *arg_description = NULL;
static const char *arg_slice = NULL;
static bool arg_slice_inherit = false;
static bool arg_expand_environment = true;
static bool arg_send_sighup = false;
static BusTransport arg_transport = BUS_TRANSPORT_LOCAL;
static const char *arg_host = NULL;
static RuntimeScope arg_runtime_scope = RUNTIME_SCOPE_SYSTEM;
static const char *arg_service_type = NULL;
static const char *arg_exec_user = NULL;
static const char *arg_exec_group = NULL;
static int arg_nice = 0;
static bool arg_nice_set = false;
static char **arg_environment = NULL;
static char **arg_property = NULL;
static enum {
ARG_STDIO_NONE, /* The default, as it is for normal services, stdin connected to /dev/null, and stdout+stderr to the journal */
ARG_STDIO_PTY, /* Interactive behaviour, requested by --pty: we allocate a pty and connect it to the TTY we are invoked from */
ARG_STDIO_DIRECT, /* Directly pass our stdin/stdout/stderr to the activated service, useful for usage in shell pipelines, requested by --pipe */
ARG_STDIO_AUTO, /* If --pipe and --pty are used together we use --pty when invoked on a TTY, and --pipe otherwise */
} arg_stdio = ARG_STDIO_NONE;
static char **arg_path_property = NULL;
static char **arg_socket_property = NULL;
static char **arg_timer_property = NULL;
static bool arg_with_timer = false;
static bool arg_quiet = false;
static bool arg_aggressive_gc = false;
static char *arg_working_directory = NULL;
static bool arg_shell = false;
static char **arg_cmdline = NULL;
static char *arg_exec_path = NULL;
static bool arg_ignore_failure = false;
static char *arg_background = NULL;
static sd_json_format_flags_t arg_json_format_flags = SD_JSON_FORMAT_OFF;
static char *arg_shell_prompt_prefix = NULL;
STATIC_DESTRUCTOR_REGISTER(arg_description, freep);
STATIC_DESTRUCTOR_REGISTER(arg_environment, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_property, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_path_property, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_socket_property, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_timer_property, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_working_directory, freep);
STATIC_DESTRUCTOR_REGISTER(arg_cmdline, strv_freep);
STATIC_DESTRUCTOR_REGISTER(arg_exec_path, freep);
STATIC_DESTRUCTOR_REGISTER(arg_background, freep);
STATIC_DESTRUCTOR_REGISTER(arg_shell_prompt_prefix, freep);
static int help(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("systemd-run", "1", &link);
if (r < 0)
return log_oom();
printf("%1$s [OPTIONS...] COMMAND [ARGUMENTS...]\n"
"\n%5$sRun the specified command in a transient scope or service.%6$s\n\n"
" -h --help Show this help\n"
" --version Show package version\n"
" --no-ask-password Do not prompt for password\n"
" --user Run as user unit\n"
" -H --host=[USER@]HOST Operate on remote host\n"
" -M --machine=CONTAINER Operate on local container\n"
" --scope Run this as scope rather than service\n"
" -u --unit=UNIT Run under the specified unit name\n"
" -p --property=NAME=VALUE Set service or scope unit property\n"
" --description=TEXT Description for unit\n"
" --slice=SLICE Run in the specified slice\n"
" --slice-inherit Inherit the slice from the caller\n"
" --expand-environment=BOOL Control expansion of environment variables\n"
" --no-block Do not wait until operation finished\n"
" -r --remain-after-exit Leave service around until explicitly stopped\n"
" --wait Wait until service stopped again\n"
" --send-sighup Send SIGHUP when terminating\n"
" --service-type=TYPE Service type\n"
" --uid=USER Run as system user\n"
" --gid=GROUP Run as system group\n"
" --nice=NICE Nice level\n"
" --working-directory=PATH Set working directory\n"
" -d --same-dir Inherit working directory from caller\n"
" -E --setenv=NAME[=VALUE] Set environment variable\n"
" -t --pty Run service on pseudo TTY as STDIN/STDOUT/\n"
" STDERR\n"
" -P --pipe Pass STDIN/STDOUT/STDERR directly to service\n"
" -q --quiet Suppress information messages during runtime\n"
" --json=pretty|short|off Print unit name and invocation id as JSON\n"
" -G --collect Unload unit after it ran, even when failed\n"
" -S --shell Invoke a $SHELL interactively\n"
" --ignore-failure Ignore the exit status of the invoked process\n"
" --background=COLOR Set ANSI color for background\n"
"\n%3$sPath options:%4$s\n"
" --path-property=NAME=VALUE Set path unit property\n"
"\n%3$sSocket options:%4$s\n"
" --socket-property=NAME=VALUE Set socket unit property\n"
"\n%3$sTimer options:%4$s\n"
" --on-active=SECONDS Run after SECONDS delay\n"
" --on-boot=SECONDS Run SECONDS after machine was booted up\n"
" --on-startup=SECONDS Run SECONDS after systemd activation\n"
" --on-unit-active=SECONDS Run SECONDS after the last activation\n"
" --on-unit-inactive=SECONDS Run SECONDS after the last deactivation\n"
" --on-calendar=SPEC Realtime timer\n"
" --on-timezone-change Run when the timezone changes\n"
" --on-clock-change Run when the realtime clock jumps\n"
" --timer-property=NAME=VALUE Set timer unit property\n"
"\nSee the %2$s for details.\n",
program_invocation_short_name,
link,
ansi_underline(), ansi_normal(),
ansi_highlight(), ansi_normal());
return 0;
}
static int help_sudo_mode(void) {
_cleanup_free_ char *link = NULL;
int r;
r = terminal_urlify_man("run0", "1", &link);
if (r < 0)
return log_oom();
/* NB: Let's not go overboard with short options: we try to keep a modicum of compatibility with
* sudo's short switches, hence please do not introduce new short switches unless they have a roughly
* equivalent purpose on sudo. Use long options for everything private to run0. */
printf("%s [OPTIONS...] COMMAND [ARGUMENTS...]\n"
"\n%sElevate privileges interactively.%s\n\n"
" -h --help Show this help\n"
" -V --version Show package version\n"
" --no-ask-password Do not prompt for password\n"
" --machine=CONTAINER Operate on local container\n"
" --unit=UNIT Run under the specified unit name\n"
" --property=NAME=VALUE Set service or scope unit property\n"
" --description=TEXT Description for unit\n"
" --slice=SLICE Run in the specified slice\n"
" --slice-inherit Inherit the slice\n"
" -u --user=USER Run as system user\n"
" -g --group=GROUP Run as system group\n"
" --nice=NICE Nice level\n"
" -D --chdir=PATH Set working directory\n"
" --setenv=NAME[=VALUE] Set environment variable\n"
" --background=COLOR Set ANSI color for background\n"
" --pty Request allocation of a pseudo TTY for stdio\n"
" --pipe Request direct pipe for stdio\n"
" --shell-prompt-prefix=PREFIX Set $SHELL_PROMPT_PREFIX\n"
"\nSee the %s for details.\n",
program_invocation_short_name,
ansi_highlight(),
ansi_normal(),
link);
return 0;
}
static bool privileged_execution(void) {
if (arg_runtime_scope != RUNTIME_SCOPE_SYSTEM)
return false;
return !arg_exec_user || STR_IN_SET(arg_exec_user, "root", "0");
}
static int add_timer_property(const char *name, const char *val) {
char *p;
assert(name);
assert(val);
p = strjoin(name, "=", val);
if (!p)
return log_oom();
if (strv_consume(&arg_timer_property, p) < 0)
return log_oom();
return 0;
}
static char **make_login_shell_cmdline(const char *shell) {
_cleanup_free_ char *argv0 = NULL;
assert(shell);
argv0 = strjoin("-", shell); /* The - is how shells determine if they shall be consider login shells */
if (!argv0)
return NULL;
return strv_new(argv0);
}
static int parse_argv(int argc, char *argv[]) {
enum {
ARG_VERSION = 0x100,
ARG_USER,
ARG_SYSTEM,
ARG_SCOPE,
ARG_DESCRIPTION,
ARG_SLICE,
ARG_SLICE_INHERIT,
ARG_EXPAND_ENVIRONMENT,
ARG_SEND_SIGHUP,
ARG_SERVICE_TYPE,
ARG_EXEC_USER,
ARG_EXEC_GROUP,
ARG_NICE,
ARG_ON_ACTIVE,
ARG_ON_BOOT,
ARG_ON_STARTUP,
ARG_ON_UNIT_ACTIVE,
ARG_ON_UNIT_INACTIVE,
ARG_ON_CALENDAR,
ARG_ON_TIMEZONE_CHANGE,
ARG_ON_CLOCK_CHANGE,
ARG_TIMER_PROPERTY,
ARG_PATH_PROPERTY,
ARG_SOCKET_PROPERTY,
ARG_NO_BLOCK,
ARG_NO_ASK_PASSWORD,
ARG_WAIT,
ARG_WORKING_DIRECTORY,
ARG_SHELL,
ARG_IGNORE_FAILURE,
ARG_BACKGROUND,
ARG_JSON,
};
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, ARG_VERSION },
{ "user", no_argument, NULL, ARG_USER },
{ "system", no_argument, NULL, ARG_SYSTEM },
{ "capsule", required_argument, NULL, 'C' },
{ "scope", no_argument, NULL, ARG_SCOPE },
{ "unit", required_argument, NULL, 'u' },
{ "description", required_argument, NULL, ARG_DESCRIPTION },
{ "slice", required_argument, NULL, ARG_SLICE },
{ "slice-inherit", no_argument, NULL, ARG_SLICE_INHERIT },
{ "remain-after-exit", no_argument, NULL, 'r' },
{ "expand-environment", required_argument, NULL, ARG_EXPAND_ENVIRONMENT },
{ "send-sighup", no_argument, NULL, ARG_SEND_SIGHUP },
{ "host", required_argument, NULL, 'H' },
{ "machine", required_argument, NULL, 'M' },
{ "service-type", required_argument, NULL, ARG_SERVICE_TYPE },
{ "wait", no_argument, NULL, ARG_WAIT },
{ "uid", required_argument, NULL, ARG_EXEC_USER },
{ "gid", required_argument, NULL, ARG_EXEC_GROUP },
{ "nice", required_argument, NULL, ARG_NICE },
{ "setenv", required_argument, NULL, 'E' },
{ "property", required_argument, NULL, 'p' },
{ "tty", no_argument, NULL, 't' }, /* deprecated alias */
{ "pty", no_argument, NULL, 't' },
{ "pipe", no_argument, NULL, 'P' },
{ "quiet", no_argument, NULL, 'q' },
{ "on-active", required_argument, NULL, ARG_ON_ACTIVE },
{ "on-boot", required_argument, NULL, ARG_ON_BOOT },
{ "on-startup", required_argument, NULL, ARG_ON_STARTUP },
{ "on-unit-active", required_argument, NULL, ARG_ON_UNIT_ACTIVE },
{ "on-unit-inactive", required_argument, NULL, ARG_ON_UNIT_INACTIVE },
{ "on-calendar", required_argument, NULL, ARG_ON_CALENDAR },
{ "on-timezone-change", no_argument, NULL, ARG_ON_TIMEZONE_CHANGE },
{ "on-clock-change", no_argument, NULL, ARG_ON_CLOCK_CHANGE },
{ "timer-property", required_argument, NULL, ARG_TIMER_PROPERTY },
{ "path-property", required_argument, NULL, ARG_PATH_PROPERTY },
{ "socket-property", required_argument, NULL, ARG_SOCKET_PROPERTY },
{ "no-block", no_argument, NULL, ARG_NO_BLOCK },
{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
{ "collect", no_argument, NULL, 'G' },
{ "working-directory", required_argument, NULL, ARG_WORKING_DIRECTORY },
{ "same-dir", no_argument, NULL, 'd' },
{ "shell", no_argument, NULL, 'S' },
{ "ignore-failure", no_argument, NULL, ARG_IGNORE_FAILURE },
{ "background", required_argument, NULL, ARG_BACKGROUND },
{ "json", required_argument, NULL, ARG_JSON },
{},
};
bool with_trigger = false;
int r, c;
assert(argc >= 0);
assert(argv);
/* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long()
* that checks for GNU extensions in optstring ('-' or '+' at the beginning). */
optind = 0;
while ((c = getopt_long(argc, argv, "+hrC:H:M:E:p:tPqGdSu:", options, NULL)) >= 0)
switch (c) {
case 'h':
return help();
case ARG_VERSION:
return version();
case ARG_NO_ASK_PASSWORD:
arg_ask_password = false;
break;
case ARG_USER:
arg_runtime_scope = RUNTIME_SCOPE_USER;
break;
case ARG_SYSTEM:
arg_runtime_scope = RUNTIME_SCOPE_SYSTEM;
break;
case 'C':
r = capsule_name_is_valid(optarg);
if (r < 0)
return log_error_errno(r, "Unable to validate capsule name '%s': %m", optarg);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Invalid capsule name: %s", optarg);
arg_host = optarg;
arg_transport = BUS_TRANSPORT_CAPSULE;
arg_runtime_scope = RUNTIME_SCOPE_USER;
break;
case ARG_SCOPE:
arg_scope = true;
break;
case 'u':
arg_unit = optarg;
break;
case ARG_DESCRIPTION:
r = free_and_strdup_warn(&arg_description, optarg);
if (r < 0)
return r;
break;
case ARG_SLICE:
arg_slice = optarg;
break;
case ARG_SLICE_INHERIT:
arg_slice_inherit = true;
break;
case ARG_EXPAND_ENVIRONMENT:
r = parse_boolean_argument("--expand-environment=", optarg, &arg_expand_environment);
if (r < 0)
return r;
break;
case ARG_SEND_SIGHUP:
arg_send_sighup = true;
break;
case 'r':
arg_remain_after_exit = true;
break;
case 'H':
arg_transport = BUS_TRANSPORT_REMOTE;
arg_host = optarg;
break;
case 'M':
arg_transport = BUS_TRANSPORT_MACHINE;
arg_host = optarg;
break;
case ARG_SERVICE_TYPE:
arg_service_type = optarg;
break;
case ARG_EXEC_USER:
arg_exec_user = optarg;
break;
case ARG_EXEC_GROUP:
arg_exec_group = optarg;
break;
case ARG_NICE:
r = parse_nice(optarg, &arg_nice);
if (r < 0)
return log_error_errno(r, "Failed to parse nice value: %s", optarg);
arg_nice_set = true;
break;
case 'E':
r = strv_env_replace_strdup_passthrough(&arg_environment, optarg);
if (r < 0)
return log_error_errno(r, "Cannot assign environment variable %s: %m", optarg);
break;
case 'p':
if (strv_extend(&arg_property, optarg) < 0)
return log_oom();
break;
case 't': /* --pty */
if (IN_SET(arg_stdio, ARG_STDIO_DIRECT, ARG_STDIO_AUTO)) /* if --pipe is already used, upgrade to auto mode */
arg_stdio = ARG_STDIO_AUTO;
else
arg_stdio = ARG_STDIO_PTY;
break;
case 'P': /* --pipe */
if (IN_SET(arg_stdio, ARG_STDIO_PTY, ARG_STDIO_AUTO)) /* If --pty is already used, upgrade to auto mode */
arg_stdio = ARG_STDIO_AUTO;
else
arg_stdio = ARG_STDIO_DIRECT;
break;
case 'q':
arg_quiet = true;
break;
case ARG_ON_ACTIVE:
r = add_timer_property("OnActiveSec", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_BOOT:
r = add_timer_property("OnBootSec", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_STARTUP:
r = add_timer_property("OnStartupSec", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_UNIT_ACTIVE:
r = add_timer_property("OnUnitActiveSec", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_UNIT_INACTIVE:
r = add_timer_property("OnUnitInactiveSec", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_CALENDAR: {
_cleanup_(calendar_spec_freep) CalendarSpec *cs = NULL;
r = calendar_spec_from_string(optarg, &cs);
if (r < 0)
return log_error_errno(r, "Failed to parse calendar event specification: %m");
/* Let's make sure the given calendar event is not in the past */
r = calendar_spec_next_usec(cs, now(CLOCK_REALTIME), NULL);
if (r == -ENOENT)
/* The calendar event is in the past — let's warn about this, but install it
* anyway as is. The service manager will trigger the service right away.
* Moreover, the server side might have a different clock or timezone than we
* do, hence it should decide when or whether to run something. */
log_warning("Specified calendar expression is in the past, proceeding anyway.");
else if (r < 0)
return log_error_errno(r, "Failed to calculate next time calendar expression elapses: %m");
r = add_timer_property("OnCalendar", optarg);
if (r < 0)
return r;
arg_with_timer = true;
break;
}
case ARG_ON_TIMEZONE_CHANGE:
r = add_timer_property("OnTimezoneChange", "yes");
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_ON_CLOCK_CHANGE:
r = add_timer_property("OnClockChange", "yes");
if (r < 0)
return r;
arg_with_timer = true;
break;
case ARG_TIMER_PROPERTY:
if (strv_extend(&arg_timer_property, optarg) < 0)
return log_oom();
arg_with_timer = arg_with_timer ||
STARTSWITH_SET(optarg,
"OnActiveSec=",
"OnBootSec=",
"OnStartupSec=",
"OnUnitActiveSec=",
"OnUnitInactiveSec=",
"OnCalendar=");
break;
case ARG_PATH_PROPERTY:
if (strv_extend(&arg_path_property, optarg) < 0)
return log_oom();
break;
case ARG_SOCKET_PROPERTY:
if (strv_extend(&arg_socket_property, optarg) < 0)
return log_oom();
break;
case ARG_NO_BLOCK:
arg_no_block = true;
break;
case ARG_WAIT:
arg_wait = true;
break;
case ARG_WORKING_DIRECTORY:
r = parse_path_argument(optarg, true, &arg_working_directory);
if (r < 0)
return r;
break;
case 'd': {
_cleanup_free_ char *p = NULL;
r = safe_getcwd(&p);
if (r < 0)
return log_error_errno(r, "Failed to get current working directory: %m");
if (empty_or_root(p))
arg_working_directory = mfree(arg_working_directory);
else
free_and_replace(arg_working_directory, p);
break;
}
case 'G':
arg_aggressive_gc = true;
break;
case 'S':
arg_shell = true;
break;
case ARG_IGNORE_FAILURE:
arg_ignore_failure = true;
break;
case ARG_BACKGROUND:
r = free_and_strdup_warn(&arg_background, optarg);
if (r < 0)
return r;
break;
case ARG_JSON:
r = parse_json_argument(optarg, &arg_json_format_flags);
if (r <= 0)
return r;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
/* If we are talking to the per-user instance PolicyKit isn't going to help */
if (arg_runtime_scope == RUNTIME_SCOPE_USER)
arg_ask_password = false;
with_trigger = !!arg_path_property || !!arg_socket_property || arg_with_timer;
/* currently, only single trigger (path, socket, timer) unit can be created simultaneously */
if ((int) !!arg_path_property + (int) !!arg_socket_property + (int) arg_with_timer > 1)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Only single trigger (path, socket, timer) unit can be created.");
if (arg_shell) {
/* If --shell is imply --pty --pipe --same-dir --service-type=exec --wait --collect, unless otherwise
* specified. */
if (!arg_scope) {
if (arg_stdio == ARG_STDIO_NONE)
arg_stdio = ARG_STDIO_AUTO;
if (!arg_working_directory) {
r = safe_getcwd(&arg_working_directory);
if (r < 0)
return log_error_errno(r, "Failed to get current working directory: %m");
}
if (!arg_service_type)
arg_service_type = "exec";
arg_wait = true;
}
arg_aggressive_gc = true;
}
if (arg_stdio == ARG_STDIO_AUTO)
/* If we both --pty and --pipe are specified we'll automatically pick --pty if we are connected fully
* to a TTY and pick direct fd passing otherwise. This way, we automatically adapt to usage in a shell
* pipeline, but we are neatly interactive with tty-level isolation otherwise. */
arg_stdio = isatty_safe(STDIN_FILENO) && isatty_safe(STDOUT_FILENO) && isatty_safe(STDERR_FILENO) ?
ARG_STDIO_PTY :
ARG_STDIO_DIRECT;
if (argc > optind) {
char **l;
if (arg_shell)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "If --shell is used, no command line is expected.");
l = strv_copy(argv + optind);
if (!l)
return log_oom();
strv_free_and_replace(arg_cmdline, l);
} else if (arg_shell) {
_cleanup_free_ char *s = NULL;
char **l;
r = get_shell(&s);
if (r < 0)
return log_error_errno(r, "Failed to determine shell: %m");
l = strv_new(s);
if (!l)
return log_oom();
strv_free_and_replace(arg_cmdline, l);
} else if (!arg_unit || !with_trigger)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL), "Command line to execute required.");
if (arg_runtime_scope == RUNTIME_SCOPE_USER && arg_transport == BUS_TRANSPORT_REMOTE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Execution in user context is not supported on remote systems.");
if (arg_scope && arg_transport == BUS_TRANSPORT_REMOTE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Scope execution is not supported on remote systems.");
if (arg_scope && (arg_remain_after_exit || arg_service_type))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--remain-after-exit and --service-type= are not supported in --scope mode.");
if (arg_stdio != ARG_STDIO_NONE && (with_trigger || arg_scope))
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--pty/--pipe is not compatible in timer or --scope mode.");
if (arg_stdio != ARG_STDIO_NONE && arg_transport == BUS_TRANSPORT_REMOTE)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--pty/--pipe is only supported when connecting to the local system or containers.");
if (arg_stdio != ARG_STDIO_NONE && arg_no_block)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--pty/--pipe is not compatible with --no-block.");
if (arg_scope && with_trigger)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Path, socket or timer options are not supported in --scope mode.");
if (arg_timer_property && !arg_with_timer)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--timer-property= has no effect without any other timer options.");
if (arg_wait) {
if (arg_no_block)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--wait may not be combined with --no-block.");
if (with_trigger)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--wait may not be combined with path, socket or timer operations.");
if (arg_scope)
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"--wait may not be combined with --scope.");
}
return 1;
}
static int parse_argv_sudo_mode(int argc, char *argv[]) {
enum {
ARG_NO_ASK_PASSWORD = 0x100,
ARG_HOST,
ARG_MACHINE,
ARG_UNIT,
ARG_PROPERTY,
ARG_DESCRIPTION,
ARG_SLICE,
ARG_SLICE_INHERIT,
ARG_NICE,
ARG_SETENV,
ARG_BACKGROUND,
ARG_PTY,
ARG_PIPE,
ARG_SHELL_PROMPT_PREFIX,
};
/* If invoked as "run0" binary, let's expose a more sudo-like interface. We add various extensions
* though (but limit the extension to long options). */
static const struct option options[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
{ "no-ask-password", no_argument, NULL, ARG_NO_ASK_PASSWORD },
{ "machine", required_argument, NULL, ARG_MACHINE },
{ "unit", required_argument, NULL, ARG_UNIT },
{ "property", required_argument, NULL, ARG_PROPERTY },
{ "description", required_argument, NULL, ARG_DESCRIPTION },
{ "slice", required_argument, NULL, ARG_SLICE },
{ "slice-inherit", no_argument, NULL, ARG_SLICE_INHERIT },
{ "user", required_argument, NULL, 'u' },
{ "group", required_argument, NULL, 'g' },
{ "nice", required_argument, NULL, ARG_NICE },
{ "chdir", required_argument, NULL, 'D' },
{ "setenv", required_argument, NULL, ARG_SETENV },
{ "background", required_argument, NULL, ARG_BACKGROUND },
{ "pty", no_argument, NULL, ARG_PTY },
{ "pipe", no_argument, NULL, ARG_PIPE },
{ "shell-prompt-prefix", required_argument, NULL, ARG_SHELL_PROMPT_PREFIX },
{},
};
int r, c;
assert(argc >= 0);
assert(argv);
/* Resetting to 0 forces the invocation of an internal initialization routine of getopt_long()
* that checks for GNU extensions in optstring ('-' or '+' at the beginning). */
optind = 0;
while ((c = getopt_long(argc, argv, "+hVu:g:D:", options, NULL)) >= 0)
switch (c) {
case 'h':
return help_sudo_mode();
case 'V':
return version();
case ARG_NO_ASK_PASSWORD:
arg_ask_password = false;
break;
case ARG_MACHINE:
arg_transport = BUS_TRANSPORT_MACHINE;
arg_host = optarg;
break;
case ARG_UNIT:
arg_unit = optarg;
break;
case ARG_PROPERTY:
if (strv_extend(&arg_property, optarg) < 0)
return log_oom();
break;
case ARG_DESCRIPTION:
r = free_and_strdup_warn(&arg_description, optarg);
if (r < 0)
return r;
break;
case ARG_SLICE:
arg_slice = optarg;
break;
case ARG_SLICE_INHERIT:
arg_slice_inherit = true;
break;
case 'u':
arg_exec_user = optarg;
break;
case 'g':
arg_exec_group = optarg;
break;
case ARG_NICE:
r = parse_nice(optarg, &arg_nice);
if (r < 0)
return log_error_errno(r, "Failed to parse nice value: %s", optarg);
arg_nice_set = true;
break;
case 'D':
/* Root will be manually suppressed later. */
r = parse_path_argument(optarg, /* suppress_root= */ false, &arg_working_directory);
if (r < 0)
return r;
break;
case ARG_SETENV:
r = strv_env_replace_strdup_passthrough(&arg_environment, optarg);
if (r < 0)
return log_error_errno(r, "Cannot assign environment variable %s: %m", optarg);
break;
case ARG_BACKGROUND:
r = free_and_strdup_warn(&arg_background, optarg);
if (r < 0)
return r;
break;
case ARG_PTY:
if (IN_SET(arg_stdio, ARG_STDIO_DIRECT, ARG_STDIO_AUTO)) /* if --pipe is already used, upgrade to auto mode */
arg_stdio = ARG_STDIO_AUTO;
else
arg_stdio = ARG_STDIO_PTY;
break;
case ARG_PIPE:
if (IN_SET(arg_stdio, ARG_STDIO_PTY, ARG_STDIO_AUTO)) /* If --pty is already used, upgrade to auto mode */
arg_stdio = ARG_STDIO_AUTO;
else
arg_stdio = ARG_STDIO_DIRECT;
break;
case ARG_SHELL_PROMPT_PREFIX:
r = free_and_strdup_warn(&arg_shell_prompt_prefix, optarg);
if (r < 0)
return r;
break;
case '?':
return -EINVAL;
default:
assert_not_reached();
}
if (!arg_working_directory) {
if (arg_exec_user) {
/* When switching to a specific user, also switch to its home directory. */
arg_working_directory = strdup("~");
if (!arg_working_directory)
return log_oom();
} else {
/* When switching to root without this being specified, then stay in the current directory */
r = safe_getcwd(&arg_working_directory);
if (r < 0)
return log_error_errno(r, "Failed to get current working directory: %m");
}
} else {
/* Root was not suppressed earlier, to allow the above check to work properly. */
if (empty_or_root(arg_working_directory))
arg_working_directory = mfree(arg_working_directory);
}
arg_service_type = "exec";
arg_quiet = true;
arg_wait = true;
arg_aggressive_gc = true;
if (IN_SET(arg_stdio, ARG_STDIO_NONE, ARG_STDIO_AUTO))
arg_stdio = isatty_safe(STDIN_FILENO) && isatty_safe(STDOUT_FILENO) && isatty_safe(STDERR_FILENO) ? ARG_STDIO_PTY : ARG_STDIO_DIRECT;
arg_expand_environment = false;
arg_send_sighup = true;
_cleanup_strv_free_ char **l = NULL;
if (argc > optind)
l = strv_copy(argv + optind);
else {
const char *e;
e = strv_env_get(arg_environment, "SHELL");
if (e)
arg_exec_path = strdup(e);
else {
if (arg_transport == BUS_TRANSPORT_LOCAL) {
r = get_shell(&arg_exec_path);
if (r < 0)
return log_error_errno(r, "Failed to determine shell: %m");
} else
arg_exec_path = strdup("/bin/sh");
}
if (!arg_exec_path)
return log_oom();
l = make_login_shell_cmdline(arg_exec_path);
}
if (!l)
return log_oom();
strv_free_and_replace(arg_cmdline, l);
if (!arg_slice) {
arg_slice = strdup(SPECIAL_USER_SLICE);
if (!arg_slice)
return log_oom();
}
_cleanup_free_ char *un = NULL;
un = getusername_malloc();
if (!un)
return log_oom();
/* Set a bunch of environment variables in a roughly sudo-compatible way */
r = strv_env_assign(&arg_environment, "SUDO_USER", un);
if (r < 0)
return log_error_errno(r, "Failed to set $SUDO_USER environment variable: %m");
r = strv_env_assignf(&arg_environment, "SUDO_UID", UID_FMT, getuid());
if (r < 0)
return log_error_errno(r, "Failed to set $SUDO_UID environment variable: %m");
r = strv_env_assignf(&arg_environment, "SUDO_GID", GID_FMT, getgid());
if (r < 0)
return log_error_errno(r, "Failed to set $SUDO_GID environment variable: %m");
if (strv_extendf(&arg_property, "LogExtraFields=ELEVATED_UID=" UID_FMT, getuid()) < 0)
return log_oom();
if (strv_extendf(&arg_property, "LogExtraFields=ELEVATED_GID=" GID_FMT, getgid()) < 0)
return log_oom();
if (strv_extendf(&arg_property, "LogExtraFields=ELEVATED_USER=%s", un) < 0)
return log_oom();
if (strv_extend(&arg_property, "PAMName=systemd-run0") < 0)
return log_oom();
if (!arg_background && arg_stdio == ARG_STDIO_PTY && shall_tint_background()) {
double hue;
if (privileged_execution())
hue = 0; /* red */
else
hue = 60 /* yellow */;
r = terminal_tint_color(hue, &arg_background);
if (r < 0)
log_debug_errno(r, "Unable to get terminal background color, not tinting background: %m");
}
if (!arg_shell_prompt_prefix) {
const char *e = secure_getenv("SYSTEMD_RUN_SHELL_PROMPT_PREFIX");
if (e) {
arg_shell_prompt_prefix = strdup(e);
if (!arg_shell_prompt_prefix)
return log_oom();
} else if (emoji_enabled()) {
arg_shell_prompt_prefix = strjoin(special_glyph(privileged_execution() ? SPECIAL_GLYPH_SUPERHERO : SPECIAL_GLYPH_IDCARD), " ");
if (!arg_shell_prompt_prefix)
return log_oom();
}
}
if (!isempty(arg_shell_prompt_prefix)) {
r = strv_env_assign(&arg_environment, "SHELL_PROMPT_PREFIX", arg_shell_prompt_prefix);
if (r < 0)
return log_error_errno(r, "Failed to set $SHELL_PROMPT_PREFIX environment variable: %m");
}
return 1;
}
static int transient_unit_set_properties(sd_bus_message *m, UnitType t, char **properties) {
int r;
assert(m);
r = sd_bus_message_append(m, "(sv)", "Description", "s", arg_description);
if (r < 0)
return bus_log_create_error(r);
if (arg_aggressive_gc) {
r = sd_bus_message_append(m, "(sv)", "CollectMode", "s", "inactive-or-failed");
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_is_bus_client(sd_bus_message_get_bus(m));
if (r < 0)
return log_error_errno(r, "Can't determine if bus connection is direct or to broker: %m");
if (r > 0) {
/* Pin the object as least as long as we are around. Note that AddRef (currently) only works
* if we talk via the bus though. */
r = sd_bus_message_append(m, "(sv)", "AddRef", "b", 1);
if (r < 0)
return bus_log_create_error(r);
}
return bus_append_unit_property_assignment_many(m, t, properties);
}
static int transient_cgroup_set_properties(sd_bus_message *m) {
_cleanup_free_ char *name = NULL;
_cleanup_free_ char *slice = NULL;
int r;
assert(m);
if (arg_slice_inherit) {
char *end;
switch (arg_runtime_scope) {
case RUNTIME_SCOPE_USER:
r = cg_pid_get_user_slice(0, &name);
break;
case RUNTIME_SCOPE_SYSTEM:
r = cg_pid_get_slice(0, &name);
break;
default:
assert_not_reached();
}
if (r < 0)
return log_error_errno(r, "Failed to get PID slice: %m");
end = endswith(name, ".slice");
if (!end)
return -ENXIO;
*end = 0;
}
if (!isempty(arg_slice) && !strextend_with_separator(&name, "-", arg_slice))
return log_oom();
if (!name)
return 0;
r = unit_name_mangle_with_suffix(name, "as slice",
arg_quiet ? 0 : UNIT_NAME_MANGLE_WARN,
".slice", &slice);
if (r < 0)
return log_error_errno(r, "Failed to mangle name '%s': %m", arg_slice);
r = sd_bus_message_append(m, "(sv)", "Slice", "s", slice);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int transient_kill_set_properties(sd_bus_message *m) {
int r;
assert(m);
if (arg_send_sighup) {
r = sd_bus_message_append(m, "(sv)", "SendSIGHUP", "b", arg_send_sighup);
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
static int transient_service_set_properties(sd_bus_message *m, const char *pty_path, int pty_fd) {
bool send_term = false;
int r;
/* We disable environment expansion on the server side via ExecStartEx=:.
* ExecStartEx was added relatively recently (v243), and some bugs were fixed only later.
* So use that feature only if required. It will fail with older systemds. */
bool use_ex_prop = !arg_expand_environment;
assert(m);
assert(pty_path || pty_fd < 0);
r = transient_unit_set_properties(m, UNIT_SERVICE, arg_property);
if (r < 0)
return r;
r = transient_kill_set_properties(m);
if (r < 0)
return r;
r = transient_cgroup_set_properties(m);
if (r < 0)
return r;
if (arg_remain_after_exit) {
r = sd_bus_message_append(m, "(sv)", "RemainAfterExit", "b", arg_remain_after_exit);
if (r < 0)
return bus_log_create_error(r);
}
if (arg_service_type) {
r = sd_bus_message_append(m, "(sv)", "Type", "s", arg_service_type);
if (r < 0)
return bus_log_create_error(r);
}
if (arg_exec_user) {
r = sd_bus_message_append(m, "(sv)", "User", "s", arg_exec_user);
if (r < 0)
return bus_log_create_error(r);
}
if (arg_exec_group) {
r = sd_bus_message_append(m, "(sv)", "Group", "s", arg_exec_group);
if (r < 0)
return bus_log_create_error(r);
}
if (arg_nice_set) {
r = sd_bus_message_append(m, "(sv)", "Nice", "i", arg_nice);
if (r < 0)
return bus_log_create_error(r);
}
if (arg_working_directory) {
r = sd_bus_message_append(m, "(sv)", "WorkingDirectory", "s", arg_working_directory);
if (r < 0)
return bus_log_create_error(r);
}
if (pty_path) {
r = sd_bus_message_append(m, "(sv)", "TTYPath", "s", pty_path);
if (r < 0)
return bus_log_create_error(r);
if (pty_fd >= 0)
r = sd_bus_message_append(m,
"(sv)(sv)(sv)",
"StandardInputFileDescriptor", "h", pty_fd,
"StandardOutputFileDescriptor", "h", pty_fd,
"StandardErrorFileDescriptor", "h", pty_fd);
else
r = sd_bus_message_append(m,
"(sv)(sv)(sv)",
"StandardInput", "s", "tty",
"StandardOutput", "s", "tty",
"StandardError", "s", "tty");
if (r < 0)
return bus_log_create_error(r);
send_term = true;
} else if (arg_stdio == ARG_STDIO_DIRECT) {
r = sd_bus_message_append(m,
"(sv)(sv)(sv)",
"StandardInputFileDescriptor", "h", STDIN_FILENO,
"StandardOutputFileDescriptor", "h", STDOUT_FILENO,
"StandardErrorFileDescriptor", "h", STDERR_FILENO);
if (r < 0)
return bus_log_create_error(r);
send_term = isatty_safe(STDIN_FILENO) || isatty_safe(STDOUT_FILENO) || isatty_safe(STDERR_FILENO);
}
if (send_term) {
const char *e;
e = getenv("TERM");
if (e) {
_cleanup_free_ char *n = NULL;
n = strjoin("TERM=", e);
if (!n)
return log_oom();
r = sd_bus_message_append(m,
"(sv)",
"Environment", "as", 1, n);
if (r < 0)
return bus_log_create_error(r);
}
}
if (!strv_isempty(arg_environment)) {
r = sd_bus_message_open_container(m, 'r', "sv");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "s", "Environment");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'v', "as");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append_strv(m, arg_environment);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
}
/* Exec container */
if (!strv_isempty(arg_cmdline)) {
r = sd_bus_message_open_container(m, 'r', "sv");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "s",
use_ex_prop ? "ExecStartEx" : "ExecStart");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'v',
use_ex_prop ? "a(sasas)" : "a(sasb)");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a',
use_ex_prop ? "(sasas)" : "(sasb)");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'r',
use_ex_prop ? "sasas" : "sasb");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "s", arg_exec_path ?: arg_cmdline[0]);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append_strv(m, arg_cmdline);
if (r < 0)
return bus_log_create_error(r);
if (use_ex_prop) {
_cleanup_strv_free_ char **opts = NULL;
r = exec_command_flags_to_strv(
(arg_expand_environment ? 0 : EXEC_COMMAND_NO_ENV_EXPAND)|(arg_ignore_failure ? EXEC_COMMAND_IGNORE_FAILURE : 0),
&opts);
if (r < 0)
return log_error_errno(r, "Failed to format execute flags: %m");
r = sd_bus_message_append_strv(m, opts);
} else
r = sd_bus_message_append(m, "b", arg_ignore_failure);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
}
return 0;
}
static int transient_scope_set_properties(sd_bus_message *m, bool allow_pidfd) {
int r;
assert(m);
r = transient_unit_set_properties(m, UNIT_SCOPE, arg_property);
if (r < 0)
return r;
r = transient_kill_set_properties(m);
if (r < 0)
return r;
r = transient_cgroup_set_properties(m);
if (r < 0)
return r;
_cleanup_(pidref_done) PidRef pidref = PIDREF_NULL;
r = pidref_set_self(&pidref);
if (r < 0)
return r;
r = bus_append_scope_pidref(m, &pidref, allow_pidfd);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int transient_timer_set_properties(sd_bus_message *m) {
int r;
assert(m);
r = transient_unit_set_properties(m, UNIT_TIMER, arg_timer_property);
if (r < 0)
return r;
/* Automatically clean up our transient timers */
r = sd_bus_message_append(m, "(sv)", "RemainAfterElapse", "b", false);
if (r < 0)
return bus_log_create_error(r);
return 0;
}
static int make_unit_name(UnitType t, char **ret) {
int r;
assert(t >= 0);
assert(t < _UNIT_TYPE_MAX);
assert(ret);
/* Preferably use our PID + pidfd ID as identifier, if available. It's a boot time unique identifier
* managed by the kernel. Unfortunately only new kernels support this, hence we keep some fallback
* logic in place. */
_cleanup_(pidref_done) PidRef self = PIDREF_NULL;
r = pidref_set_self(&self);
if (r < 0)
return log_error_errno(r, "Failed to get reference to my own process: %m");
r = pidref_acquire_pidfd_id(&self);
if (r < 0) {
log_debug_errno(r, "Failed to acquire pidfd ID of myself, defaulting to randomized unit name: %m");
/* We couldn't get the pidfd id. In that case, just pick a random uuid as name */
sd_id128_t rnd;
r = sd_id128_randomize(&rnd);
if (r < 0)
return log_error_errno(r, "Failed to generate random run unit name: %m");
r = asprintf(ret, "run-r" SD_ID128_FORMAT_STR ".%s", SD_ID128_FORMAT_VAL(rnd), unit_type_to_string(t));
} else
r = asprintf(ret, "run-p" PID_FMT "-i%" PRIu64 ".%s", self.pid, self.fd_id, unit_type_to_string(t));
if (r < 0)
return log_oom();
return 0;
}
static int connect_bus(sd_bus **ret) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
assert(ret);
/* If --wait is used connect via the bus, unconditionally, as ref/unref is not supported via the
* limited direct connection */
if (arg_wait ||
arg_stdio != ARG_STDIO_NONE ||
(arg_runtime_scope == RUNTIME_SCOPE_USER && !IN_SET(arg_transport, BUS_TRANSPORT_LOCAL, BUS_TRANSPORT_CAPSULE)))
r = bus_connect_transport(arg_transport, arg_host, arg_runtime_scope, &bus);
else
r = bus_connect_transport_systemd(arg_transport, arg_host, arg_runtime_scope, &bus);
if (r < 0)
return bus_log_connect_error(r, arg_transport, arg_runtime_scope);
(void) sd_bus_set_allow_interactive_authorization(bus, arg_ask_password);
*ret = TAKE_PTR(bus);
return 0;
}
typedef struct RunContext {
sd_event *event;
PTYForward *forward;
char *service;
char *bus_path;
/* Bus objects */
sd_bus *bus;
sd_bus_slot *match_properties_changed;
sd_bus_slot *match_disconnected;
sd_event_source *retry_timer;
/* Current state of the unit */
char *active_state;
bool has_job;
/* The exit data of the unit */
uint64_t inactive_exit_usec;
uint64_t inactive_enter_usec;
char *result;
uint64_t cpu_usage_nsec;
uint64_t memory_peak;
uint64_t memory_swap_peak;
uint64_t ip_ingress_bytes;
uint64_t ip_egress_bytes;
uint64_t io_read_bytes;
uint64_t io_write_bytes;
uint32_t exit_code;
uint32_t exit_status;
} RunContext;
static int run_context_update(RunContext *c);
static int run_context_attach_bus(RunContext *c, sd_bus *bus);
static void run_context_detach_bus(RunContext *c);
static int run_context_reconnect(RunContext *c);
static void run_context_done(RunContext *c) {
assert(c);
run_context_detach_bus(c);
c->retry_timer = sd_event_source_disable_unref(c->retry_timer);
c->forward = pty_forward_free(c->forward);
c->event = sd_event_unref(c->event);
free(c->active_state);
free(c->result);
free(c->bus_path);
free(c->service);
}
static int on_retry_timer(sd_event_source *s, uint64_t usec, void *userdata) {
RunContext *c = ASSERT_PTR(userdata);
c->retry_timer = sd_event_source_disable_unref(c->retry_timer);
return run_context_reconnect(c);
}
static int run_context_reconnect(RunContext *c) {
int r;
assert(c);
run_context_detach_bus(c);
_cleanup_(sd_bus_unrefp) sd_bus *bus = NULL;
r = connect_bus(&bus);
if (r < 0) {
log_warning_errno(r, "Failed to reconnect, retrying in 2s: %m");
r = event_reset_time_relative(
c->event,
&c->retry_timer,
CLOCK_MONOTONIC,
2 * USEC_PER_SEC, /* accuracy= */ 0,
on_retry_timer, c,
SD_EVENT_PRIORITY_NORMAL,
"retry-timeout",
/* force_reset= */ false);
if (r < 0) {
(void) sd_event_exit(c->event, EXIT_FAILURE);
return log_error_errno(r, "Failed to install retry timer: %m");
}
return 0;
}
r = run_context_attach_bus(c, bus);
if (r < 0) {
(void) sd_event_exit(c->event, EXIT_FAILURE);
return r;
}
log_info("Reconnected to bus.");
return run_context_update(c);
}
static void run_context_check_done(RunContext *c) {
assert(c);
bool done = STRPTR_IN_SET(c->active_state, "inactive", "failed") && !c->has_job;
if (done && c->forward) /* If the service is gone, it's time to drain the output */
done = pty_forward_drain(c->forward);
if (done)
(void) sd_event_exit(c->event, EXIT_SUCCESS);
}
static int map_job(sd_bus *bus, const char *member, sd_bus_message *m, sd_bus_error *error, void *userdata) {
bool *b = userdata;
const char *job;
uint32_t id;
int r;
r = sd_bus_message_read(m, "(uo)", &id, &job);
if (r < 0)
return r;
*b = id != 0 || !streq(job, "/");
return 0;
}
static int run_context_update(RunContext *c) {
static const struct bus_properties_map map[] = {
{ "ActiveState", "s", NULL, offsetof(RunContext, active_state) },
{ "InactiveExitTimestampMonotonic", "t", NULL, offsetof(RunContext, inactive_exit_usec) },
{ "InactiveEnterTimestampMonotonic", "t", NULL, offsetof(RunContext, inactive_enter_usec) },
{ "Result", "s", NULL, offsetof(RunContext, result) },
{ "ExecMainCode", "i", NULL, offsetof(RunContext, exit_code) },
{ "ExecMainStatus", "i", NULL, offsetof(RunContext, exit_status) },
{ "CPUUsageNSec", "t", NULL, offsetof(RunContext, cpu_usage_nsec) },
{ "MemoryPeak", "t", NULL, offsetof(RunContext, memory_peak) },
{ "MemorySwapPeak", "t", NULL, offsetof(RunContext, memory_swap_peak) },
{ "IPIngressBytes", "t", NULL, offsetof(RunContext, ip_ingress_bytes) },
{ "IPEgressBytes", "t", NULL, offsetof(RunContext, ip_egress_bytes) },
{ "IOReadBytes", "t", NULL, offsetof(RunContext, io_read_bytes) },
{ "IOWriteBytes", "t", NULL, offsetof(RunContext, io_write_bytes) },
{ "Job", "(uo)", map_job, offsetof(RunContext, has_job) },
{}
};
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
assert(c);
assert(c->bus);
r = bus_map_all_properties(
c->bus,
"org.freedesktop.systemd1",
c->bus_path,
map,
BUS_MAP_STRDUP,
&error,
NULL,
c);
if (r < 0) {
/* If this is a connection error, then try to reconnect. This might be because the service
* manager is being restarted. Handle this gracefully. */
if (sd_bus_error_has_names(
&error,
SD_BUS_ERROR_NO_REPLY,
SD_BUS_ERROR_DISCONNECTED,
SD_BUS_ERROR_TIMED_OUT,
SD_BUS_ERROR_SERVICE_UNKNOWN,
SD_BUS_ERROR_NAME_HAS_NO_OWNER)) {
log_info("Bus call failed due to connection problems. Trying to reconnect...");
/* Not propagating error, because we handled it already, by reconnecting. */
return run_context_reconnect(c);
}
(void) sd_event_exit(c->event, EXIT_FAILURE);
return log_error_errno(r, "Failed to query unit state: %s", bus_error_message(&error, r));
}
run_context_check_done(c);
return 0;
}
static int on_properties_changed(sd_bus_message *m, void *userdata, sd_bus_error *error) {
return run_context_update(ASSERT_PTR(userdata));
}
static int on_disconnected(sd_bus_message *m, void *userdata, sd_bus_error *error) {
/* If our connection gets terminated, then try to reconnect. This might be because the service
* manager is being restarted. Handle this gracefully. */
log_info("Got disconnected from bus connection. Trying to reconnect...");
return run_context_reconnect(ASSERT_PTR(userdata));
}
static int run_context_attach_bus(RunContext *c, sd_bus *bus) {
int r;
assert(c);
assert(bus);
assert(!c->bus);
assert(!c->match_properties_changed);
assert(!c->match_disconnected);
c->bus = sd_bus_ref(bus);
r = sd_bus_match_signal_async(
c->bus,
&c->match_properties_changed,
"org.freedesktop.systemd1",
c->bus_path,
"org.freedesktop.DBus.Properties",
"PropertiesChanged",
on_properties_changed, NULL, c);
if (r < 0)
return log_error_errno(r, "Failed to request PropertiesChanged signal match: %m");
r = sd_bus_match_signal_async(
bus,
&c->match_disconnected,
"org.freedesktop.DBus.Local",
/* path= */ NULL,
"org.freedesktop.DBus.Local",
"Disconnected",
on_disconnected, NULL, c);
if (r < 0)
return log_error_errno(r, "Failed to request Disconnected signal match: %m");
r = sd_bus_attach_event(c->bus, c->event, SD_EVENT_PRIORITY_NORMAL);
if (r < 0)
return log_error_errno(r, "Failed to attach bus to event loop: %m");
return 0;
}
static void run_context_detach_bus(RunContext *c) {
assert(c);
if (c->bus) {
(void) sd_bus_detach_event(c->bus);
c->bus = sd_bus_unref(c->bus);
}
c->match_properties_changed = sd_bus_slot_unref(c->match_properties_changed);
c->match_disconnected = sd_bus_slot_unref(c->match_disconnected);
}
static int pty_forward_handler(PTYForward *f, int rcode, void *userdata) {
RunContext *c = ASSERT_PTR(userdata);
assert(f);
if (rcode == -ECANCELED) {
log_debug_errno(rcode, "PTY forwarder disconnected.");
if (!arg_wait)
return sd_event_exit(c->event, EXIT_SUCCESS);
/* If --wait is specified, we'll only exit the pty forwarding, but will continue to wait
* for the service to end. If the user hits ^C we'll exit too. */
} else if (rcode < 0) {
(void) sd_event_exit(c->event, EXIT_FAILURE);
return log_error_errno(rcode, "Error on PTY forwarding logic: %m");
}
run_context_check_done(c);
return 0;
}
static int make_transient_service_unit(
sd_bus *bus,
sd_bus_message **message,
const char *service,
const char *pty_path,
int pty_fd) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
int r;
assert(bus);
assert(message);
assert(service);
r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
if (r < 0)
return bus_log_create_error(r);
/* Name and mode */
r = sd_bus_message_append(m, "ss", service, "fail");
if (r < 0)
return bus_log_create_error(r);
/* Properties */
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
r = transient_service_set_properties(m, pty_path, pty_fd);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
/* Auxiliary units */
r = sd_bus_message_append(m, "a(sa(sv))", 0);
if (r < 0)
return bus_log_create_error(r);
*message = TAKE_PTR(m);
return 0;
}
static int bus_call_with_hint(
sd_bus *bus,
sd_bus_message *message,
const char *name,
sd_bus_message **reply) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
int r;
r = sd_bus_call(bus, message, 0, &error, reply);
if (r < 0) {
log_error_errno(r, "Failed to start transient %s unit: %s", name, bus_error_message(&error, r));
if (!arg_expand_environment &&
sd_bus_error_has_names(&error,
SD_BUS_ERROR_UNKNOWN_PROPERTY,
SD_BUS_ERROR_PROPERTY_READ_ONLY))
log_notice_errno(r, "Hint: --expand-environment=no is not supported by old systemd");
}
return r;
}
static int acquire_invocation_id(sd_bus *bus, const char *unit, sd_id128_t *ret) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_free_ char *object = NULL;
int r;
assert(bus);
assert(ret);
if (unit) {
object = unit_dbus_path_from_name(unit);
if (!object)
return log_oom();
}
r = sd_bus_get_property(bus,
"org.freedesktop.systemd1",
object ?: "/org/freedesktop/systemd1/unit/self",
"org.freedesktop.systemd1.Unit",
"InvocationID",
&error,
&reply,
"ay");
if (r < 0)
return log_error_errno(r, "Failed to request invocation ID for unit: %s", bus_error_message(&error, r));
r = bus_message_read_id128(reply, ret);
if (r < 0)
return bus_log_parse_error(r);
return r; /* Return true when we get a non-null invocation ID. */
}
static void set_window_title(PTYForward *f) {
_cleanup_free_ char *hn = NULL, *cl = NULL, *dot = NULL;
assert(f);
if (!shall_set_terminal_title())
return;
if (!arg_host)
(void) gethostname_strict(&hn);
cl = strv_join(arg_cmdline, " ");
if (!cl)
return (void) log_oom();
if (emoji_enabled())
dot = strjoin(special_glyph(privileged_execution() ? SPECIAL_GLYPH_RED_CIRCLE : SPECIAL_GLYPH_YELLOW_CIRCLE), " ");
if (arg_host || hn)
(void) pty_forward_set_titlef(f, "%s%s on %s", strempty(dot), cl, arg_host ?: hn);
else
(void) pty_forward_set_titlef(f, "%s%s", strempty(dot), cl);
(void) pty_forward_set_title_prefix(f, dot);
}
static int fchown_to_capsule(int fd, const char *capsule) {
_cleanup_free_ char *p = NULL;
int r;
assert(fd >= 0);
assert(capsule);
p = path_join("/run/capsules/", capsule);
if (!p)
return -ENOMEM;
struct stat st;
r = chase_and_stat(p, /* root= */ NULL, CHASE_SAFE|CHASE_PROHIBIT_SYMLINKS, /* ret_path= */ NULL, &st);
if (r < 0)
return r;
if (uid_is_system(st.st_uid) || gid_is_system(st.st_gid)) /* paranoid safety check */
return -EPERM;
return fchmod_and_chown(fd, 0600, st.st_uid, st.st_gid);
}
static int print_unit_invocation(const char *unit, sd_id128_t invocation_id) {
_cleanup_(sd_json_variant_unrefp) sd_json_variant *v = NULL;
int r;
assert(unit);
if (!sd_json_format_enabled(arg_json_format_flags)) {
if (sd_id128_is_null(invocation_id))
log_info("Running as unit: %s", unit);
else
log_info("Running as unit: %s; invocation ID: " SD_ID128_FORMAT_STR, unit, SD_ID128_FORMAT_VAL(invocation_id));
return 0;
}
r = sd_json_variant_set_field_string(&v, "unit", unit);
if (r < 0)
return r;
if (!sd_id128_is_null(invocation_id)) {
r = sd_json_variant_set_field_id128(&v, "invocation_id", invocation_id);
if (r < 0)
return r;
}
return sd_json_variant_dump(v, arg_json_format_flags, stdout, NULL);
}
static int start_transient_service(sd_bus *bus) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_free_ char *service = NULL, *pty_path = NULL;
_cleanup_close_ int pty_fd = -EBADF, peer_fd = -EBADF;
int r;
assert(bus);
(void) polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
if (arg_stdio == ARG_STDIO_PTY) {
if (IN_SET(arg_transport, BUS_TRANSPORT_LOCAL, BUS_TRANSPORT_CAPSULE)) {
pty_fd = openpt_allocate(O_RDWR|O_NOCTTY|O_CLOEXEC|O_NONBLOCK, &pty_path);
if (pty_fd < 0)
return log_error_errno(pty_fd, "Failed to acquire pseudo tty: %m");
peer_fd = pty_open_peer(pty_fd, O_RDWR|O_NOCTTY|O_CLOEXEC);
if (peer_fd < 0)
return log_error_errno(peer_fd, "Failed to open pty peer: %m");
if (arg_transport == BUS_TRANSPORT_CAPSULE) {
/* If we are in capsule mode, we must give the capsule UID/GID access to the PTY we just allocated first. */
r = fchown_to_capsule(peer_fd, arg_host);
if (r < 0)
return log_error_errno(r, "Failed to chown tty to capsule UID/GID: %m");
}
} else if (arg_transport == BUS_TRANSPORT_MACHINE) {
_cleanup_(sd_bus_unrefp) sd_bus *system_bus = NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *pty_reply = NULL;
const char *s;
r = sd_bus_default_system(&system_bus);
if (r < 0)
return log_error_errno(r, "Failed to connect to system bus: %m");
(void) sd_bus_set_allow_interactive_authorization(system_bus, arg_ask_password);
r = bus_call_method(system_bus,
bus_machine_mgr,
"OpenMachinePTY",
&error,
&pty_reply,
"s", arg_host);
if (r < 0)
return log_error_errno(r, "Failed to get machine PTY: %s", bus_error_message(&error, r));
r = sd_bus_message_read(pty_reply, "hs", &pty_fd, &s);
if (r < 0)
return bus_log_parse_error(r);
pty_fd = fcntl(pty_fd, F_DUPFD_CLOEXEC, 3);
if (pty_fd < 0)
return log_error_errno(errno, "Failed to duplicate master fd: %m");
pty_path = strdup(s);
if (!pty_path)
return log_oom();
peer_fd = pty_open_peer_racefree(pty_fd, O_RDWR|O_NOCTTY|O_CLOEXEC);
if (ERRNO_IS_NEG_NOT_SUPPORTED(peer_fd))
log_debug_errno(r, "TIOCGPTPEER ioctl not available, falling back to race-ful PTY peer opening: %m");
/* We do not open the peer_fd in this case, we let systemd on the remote side open it instead */
else if (peer_fd < 0)
return log_debug_errno(peer_fd, "Failed to open PTY peer: %m");
// FIXME: Introduce OpenMachinePTYEx() that accepts ownership/permission as param
// and additionally returns the pty fd, for #33216 and #32999
} else
assert_not_reached();
}
/* Optionally, wait for the start job to complete. If we are supposed to read the service's stdin
* lets skip this however, because we should start that already when the start job is running, and
* there's little point in waiting for the start job to complete in that case anyway, as we'll wait
* for EOF anyway, which is going to be much later. */
if (!arg_no_block && arg_stdio == ARG_STDIO_NONE) {
r = bus_wait_for_jobs_new(bus, &w);
if (r < 0)
return log_error_errno(r, "Could not watch jobs: %m");
}
if (arg_unit) {
r = unit_name_mangle_with_suffix(arg_unit, "as unit",
arg_quiet ? 0 : UNIT_NAME_MANGLE_WARN,
".service", &service);
if (r < 0)
return log_error_errno(r, "Failed to mangle unit name: %m");
} else {
r = make_unit_name(UNIT_SERVICE, &service);
if (r < 0)
return r;
}
r = make_transient_service_unit(bus, &m, service, pty_path, peer_fd);
if (r < 0)
return r;
peer_fd = safe_close(peer_fd);
r = bus_call_with_hint(bus, m, "service", &reply);
if (r < 0)
return r;
if (w) {
const char *object;
r = sd_bus_message_read(reply, "o", &object);
if (r < 0)
return bus_log_parse_error(r);
r = bus_wait_for_jobs_one(w,
object,
arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR,
arg_runtime_scope == RUNTIME_SCOPE_USER ? STRV_MAKE_CONST("--user") : NULL);
if (r < 0)
return r;
}
if (!arg_quiet) {
sd_id128_t invocation_id;
r = acquire_invocation_id(bus, service, &invocation_id);
if (r < 0)
return r;
r = print_unit_invocation(service, invocation_id);
if (r < 0)
return r;
}
if (arg_wait || arg_stdio != ARG_STDIO_NONE) {
_cleanup_(run_context_done) RunContext c = {
.cpu_usage_nsec = NSEC_INFINITY,
.memory_peak = UINT64_MAX,
.memory_swap_peak = UINT64_MAX,
.ip_ingress_bytes = UINT64_MAX,
.ip_egress_bytes = UINT64_MAX,
.io_read_bytes = UINT64_MAX,
.io_write_bytes = UINT64_MAX,
.inactive_exit_usec = USEC_INFINITY,
.inactive_enter_usec = USEC_INFINITY,
};
r = sd_event_default(&c.event);
if (r < 0)
return log_error_errno(r, "Failed to get event loop: %m");
c.service = strdup(service);
if (!c.service)
return log_oom();
c.bus_path = unit_dbus_path_from_name(service);
if (!c.bus_path)
return log_oom();
if (pty_fd >= 0) {
(void) sd_event_set_signal_exit(c.event, true);
if (!arg_quiet)
log_info("Press ^] three times within 1s to disconnect TTY.");
r = pty_forward_new(c.event, pty_fd, PTY_FORWARD_IGNORE_INITIAL_VHANGUP, &c.forward);
if (r < 0)
return log_error_errno(r, "Failed to create PTY forwarder: %m");
pty_forward_set_handler(c.forward, pty_forward_handler, &c);
/* Make sure to process any TTY events before we process bus events */
(void) pty_forward_set_priority(c.forward, SD_EVENT_PRIORITY_IMPORTANT);
if (!isempty(arg_background))
(void) pty_forward_set_background_color(c.forward, arg_background);
set_window_title(c.forward);
}
r = run_context_attach_bus(&c, bus);
if (r < 0)
return r;
r = run_context_update(&c);
if (r < 0)
return r;
r = sd_event_loop(c.event);
if (r < 0)
return log_error_errno(r, "Failed to run event loop: %m");
if (arg_wait && !arg_quiet) {
if (!isempty(c.result))
log_info("Finished with result: %s", strna(c.result));
if (c.exit_code > 0)
log_info("Main processes terminated with: code=%s, status=%u/%s",
sigchld_code_to_string(c.exit_code),
c.exit_status,
strna(c.exit_code == CLD_EXITED ?
exit_status_to_string(c.exit_status, EXIT_STATUS_FULL) :
signal_to_string(c.exit_status)));
if (timestamp_is_set(c.inactive_enter_usec) &&
timestamp_is_set(c.inactive_exit_usec) &&
c.inactive_enter_usec > c.inactive_exit_usec)
log_info("Service runtime: %s",
FORMAT_TIMESPAN(c.inactive_enter_usec - c.inactive_exit_usec, USEC_PER_MSEC));
if (c.cpu_usage_nsec != NSEC_INFINITY)
log_info("CPU time consumed: %s",
FORMAT_TIMESPAN(DIV_ROUND_UP(c.cpu_usage_nsec, NSEC_PER_USEC), USEC_PER_MSEC));
if (c.memory_peak != UINT64_MAX) {
const char *swap;
if (c.memory_swap_peak != UINT64_MAX)
swap = strjoina(" (swap: ", FORMAT_BYTES(c.memory_swap_peak), ")");
else
swap = "";
log_info("Memory peak: %s%s", FORMAT_BYTES(c.memory_peak), swap);
}
const char *ip_ingress = NULL, *ip_egress = NULL;
if (!IN_SET(c.ip_ingress_bytes, 0, UINT64_MAX))
ip_ingress = strjoina(" received: ", FORMAT_BYTES(c.ip_ingress_bytes));
if (!IN_SET(c.ip_egress_bytes, 0, UINT64_MAX))
ip_egress = strjoina(" sent: ", FORMAT_BYTES(c.ip_egress_bytes));
if (ip_ingress || ip_egress)
log_info("IP traffic%s%s", strempty(ip_ingress), strempty(ip_egress));
const char *io_read = NULL, *io_write = NULL;
if (!IN_SET(c.io_read_bytes, 0, UINT64_MAX))
io_read = strjoina(" read: ", FORMAT_BYTES(c.io_read_bytes));
if (!IN_SET(c.io_write_bytes, 0, UINT64_MAX))
io_write = strjoina(" written: ", FORMAT_BYTES(c.io_write_bytes));
if (io_read || io_write)
log_info("IO bytes%s%s", strempty(io_read), strempty(io_write));
}
/* Try to propagate the service's return value. But if the service defines
* e.g. SuccessExitStatus, honour this, and return 0 to mean "success". */
if (streq_ptr(c.result, "success"))
return EXIT_SUCCESS;
if (streq_ptr(c.result, "exit-code") && c.exit_status > 0)
return c.exit_status;
if (streq_ptr(c.result, "signal"))
return EXIT_EXCEPTION;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int start_transient_scope(sd_bus *bus) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_strv_free_ char **env = NULL, **user_env = NULL;
_cleanup_free_ char *scope = NULL;
const char *object = NULL;
sd_id128_t invocation_id;
bool allow_pidfd = true;
int r;
assert(bus);
assert(!strv_isempty(arg_cmdline));
r = bus_wait_for_jobs_new(bus, &w);
if (r < 0)
return log_error_errno(r, "Could not watch jobs: %m");
if (arg_unit) {
r = unit_name_mangle_with_suffix(arg_unit, "as unit",
arg_quiet ? 0 : UNIT_NAME_MANGLE_WARN,
".scope", &scope);
if (r < 0)
return log_error_errno(r, "Failed to mangle scope name: %m");
} else {
r = make_unit_name(UNIT_SCOPE, &scope);
if (r < 0)
return r;
}
(void) polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
for (;;) {
_cleanup_(sd_bus_error_free) sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
if (r < 0)
return bus_log_create_error(r);
/* Name and Mode */
r = sd_bus_message_append(m, "ss", scope, "fail");
if (r < 0)
return bus_log_create_error(r);
/* Properties */
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
r = transient_scope_set_properties(m, allow_pidfd);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
/* Auxiliary units */
r = sd_bus_message_append(m, "a(sa(sv))", 0);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_call(bus, m, 0, &error, &reply);
if (r < 0) {
if (sd_bus_error_has_names(&error, SD_BUS_ERROR_UNKNOWN_PROPERTY, SD_BUS_ERROR_PROPERTY_READ_ONLY) && allow_pidfd) {
log_debug("Retrying with classic PIDs.");
allow_pidfd = false;
continue;
}
return log_error_errno(r, "Failed to start transient scope unit: %s", bus_error_message(&error, r));
}
break;
}
r = sd_bus_message_read(reply, "o", &object);
if (r < 0)
return bus_log_parse_error(r);
r = bus_wait_for_jobs_one(w, object, arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR,
arg_runtime_scope == RUNTIME_SCOPE_USER ? STRV_MAKE_CONST("--user") : NULL);
if (r < 0)
return r;
r = acquire_invocation_id(bus, NULL, &invocation_id);
if (r < 0)
return r;
if (r == 0)
log_debug("No invocation ID set.");
else {
if (strv_extendf(&user_env, "INVOCATION_ID=" SD_ID128_FORMAT_STR, SD_ID128_FORMAT_VAL(invocation_id)) < 0)
return log_oom();
}
if (arg_nice_set) {
if (setpriority(PRIO_PROCESS, 0, arg_nice) < 0)
return log_error_errno(errno, "Failed to set nice level: %m");
}
if (arg_exec_group) {
gid_t gid;
r = get_group_creds(&arg_exec_group, &gid, 0);
if (r < 0)
return log_error_errno(r, "Failed to resolve group %s: %m", arg_exec_group);
if (setresgid(gid, gid, gid) < 0)
return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
}
if (arg_exec_user) {
const char *home, *shell;
uid_t uid;
gid_t gid;
r = get_user_creds(&arg_exec_user, &uid, &gid, &home, &shell,
USER_CREDS_CLEAN|USER_CREDS_SUPPRESS_PLACEHOLDER|USER_CREDS_PREFER_NSS);
if (r < 0)
return log_error_errno(r, "Failed to resolve user %s: %m", arg_exec_user);
if (home) {
r = strv_extendf(&user_env, "HOME=%s", home);
if (r < 0)
return log_oom();
}
if (shell) {
r = strv_extendf(&user_env, "SHELL=%s", shell);
if (r < 0)
return log_oom();
}
r = strv_extendf(&user_env, "USER=%s", arg_exec_user);
if (r < 0)
return log_oom();
r = strv_extendf(&user_env, "LOGNAME=%s", arg_exec_user);
if (r < 0)
return log_oom();
if (!arg_exec_group) {
if (setresgid(gid, gid, gid) < 0)
return log_error_errno(errno, "Failed to change GID to " GID_FMT ": %m", gid);
}
if (setresuid(uid, uid, uid) < 0)
return log_error_errno(errno, "Failed to change UID to " UID_FMT ": %m", uid);
}
if (arg_working_directory && chdir(arg_working_directory) < 0)
return log_error_errno(errno, "Failed to change directory to '%s': %m", arg_working_directory);
env = strv_env_merge(environ, user_env, arg_environment);
if (!env)
return log_oom();
if (!arg_quiet) {
r = print_unit_invocation(scope, invocation_id);
if (r < 0)
return r;
}
if (arg_expand_environment) {
_cleanup_strv_free_ char **expanded_cmdline = NULL, **unset_variables = NULL, **bad_variables = NULL;
r = replace_env_argv(arg_cmdline, env, &expanded_cmdline, &unset_variables, &bad_variables);
if (r < 0)
return log_error_errno(r, "Failed to expand environment variables: %m");
free_and_replace(arg_cmdline, expanded_cmdline);
if (!strv_isempty(unset_variables)) {
_cleanup_free_ char *ju = strv_join(unset_variables, ", ");
log_warning("Referenced but unset environment variable evaluates to an empty string: %s", strna(ju));
}
if (!strv_isempty(bad_variables)) {
_cleanup_free_ char *jb = strv_join(bad_variables, ", ");
log_warning("Invalid environment variable name evaluates to an empty string: %s", strna(jb));
}
}
execvpe(arg_cmdline[0], arg_cmdline, env);
return log_error_errno(errno, "Failed to execute: %m");
}
static int make_transient_trigger_unit(
sd_bus *bus,
sd_bus_message **message,
const char *suffix,
const char *trigger,
const char *service) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL;
int r;
assert(bus);
assert(message);
assert(suffix);
assert(trigger);
assert(service);
r = bus_message_new_method_call(bus, &m, bus_systemd_mgr, "StartTransientUnit");
if (r < 0)
return bus_log_create_error(r);
/* Name and Mode */
r = sd_bus_message_append(m, "ss", trigger, "fail");
if (r < 0)
return bus_log_create_error(r);
/* Properties */
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
if (streq(suffix, ".path"))
r = transient_unit_set_properties(m, UNIT_PATH, arg_path_property);
else if (streq(suffix, ".socket"))
r = transient_unit_set_properties(m, UNIT_SOCKET, arg_socket_property);
else if (streq(suffix, ".timer"))
r = transient_timer_set_properties(m);
else
assert_not_reached();
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "(sa(sv))");
if (r < 0)
return bus_log_create_error(r);
if (!strv_isempty(arg_cmdline)) {
r = sd_bus_message_open_container(m, 'r', "sa(sv)");
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_append(m, "s", service);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_open_container(m, 'a', "(sv)");
if (r < 0)
return bus_log_create_error(r);
r = transient_service_set_properties(m, /* pty_path = */ NULL, /* pty_fd = */ -EBADF);
if (r < 0)
return r;
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
}
r = sd_bus_message_close_container(m);
if (r < 0)
return bus_log_create_error(r);
*message = TAKE_PTR(m);
return 0;
}
static int start_transient_trigger(sd_bus *bus, const char *suffix) {
_cleanup_(sd_bus_message_unrefp) sd_bus_message *m = NULL, *reply = NULL;
_cleanup_(bus_wait_for_jobs_freep) BusWaitForJobs *w = NULL;
_cleanup_free_ char *trigger = NULL, *service = NULL;
const char *object = NULL;
int r;
assert(bus);
assert(suffix);
r = bus_wait_for_jobs_new(bus, &w);
if (r < 0)
return log_error_errno(r, "Could not watch jobs: %m");
if (arg_unit) {
switch (unit_name_to_type(arg_unit)) {
case UNIT_SERVICE:
service = strdup(arg_unit);
if (!service)
return log_oom();
r = unit_name_change_suffix(service, suffix, &trigger);
if (r < 0)
return log_error_errno(r, "Failed to change unit suffix: %m");
break;
case UNIT_TIMER:
trigger = strdup(arg_unit);
if (!trigger)
return log_oom();
r = unit_name_change_suffix(trigger, ".service", &service);
if (r < 0)
return log_error_errno(r, "Failed to change unit suffix: %m");
break;
default:
r = unit_name_mangle_with_suffix(arg_unit, "as unit",
arg_quiet ? 0 : UNIT_NAME_MANGLE_WARN,
".service", &service);
if (r < 0)
return log_error_errno(r, "Failed to mangle unit name: %m");
r = unit_name_mangle_with_suffix(arg_unit, "as trigger",
arg_quiet ? 0 : UNIT_NAME_MANGLE_WARN,
suffix, &trigger);
if (r < 0)
return log_error_errno(r, "Failed to mangle unit name: %m");
break;
}
} else {
r = make_unit_name(UNIT_SERVICE, &service);
if (r < 0)
return r;
r = unit_name_change_suffix(service, suffix, &trigger);
if (r < 0)
return log_error_errno(r, "Failed to change unit suffix: %m");
}
r = make_transient_trigger_unit(bus, &m, suffix, trigger, service);
if (r < 0)
return r;
(void) polkit_agent_open_if_enabled(arg_transport, arg_ask_password);
r = bus_call_with_hint(bus, m, suffix + 1, &reply);
if (r < 0)
return r;
r = sd_bus_message_read(reply, "o", &object);
if (r < 0)
return bus_log_parse_error(r);
r = bus_wait_for_jobs_one(w, object, arg_quiet ? 0 : BUS_WAIT_JOBS_LOG_ERROR,
arg_runtime_scope == RUNTIME_SCOPE_USER ? STRV_MAKE_CONST("--user") : NULL);
if (r < 0)
return r;
if (!arg_quiet) {
log_info("Running %s as unit: %s", suffix + 1, trigger);
if (!strv_isempty(arg_cmdline))
log_info("Will run service as unit: %s", service);
}
return EXIT_SUCCESS;
}
static bool shall_make_executable_absolute(void) {
if (arg_exec_path)
return false;
if (strv_isempty(arg_cmdline))
return false;
if (arg_transport != BUS_TRANSPORT_LOCAL)
return false;
FOREACH_STRING(f, "RootDirectory=", "RootImage=", "ExecSearchPath=", "MountImages=", "ExtensionImages=")
if (strv_find_startswith(arg_property, f))
return false;
return true;
}
static int run(int argc, char* argv[]) {
_cleanup_(sd_bus_flush_close_unrefp) sd_bus *bus = NULL;
int r;
log_setup();
if (invoked_as(argv, "run0"))
r = parse_argv_sudo_mode(argc, argv);
else
r = parse_argv(argc, argv);
if (r <= 0)
return r;
if (shall_make_executable_absolute()) {
/* Patch in an absolute path to fail early for user convenience, but only when we can do it
* (i.e. we will be running from the same file system). This also uses the user's $PATH,
* while we use a fixed search path in the manager. */
_cleanup_free_ char *command = NULL;
r = find_executable(arg_cmdline[0], &command);
if (ERRNO_IS_NEG_PRIVILEGE(r))
log_debug_errno(r, "Failed to find executable '%s' due to permission problems, leaving path as is: %m", arg_cmdline[0]);
else if (r < 0)
return log_error_errno(r, "Failed to find executable %s: %m", arg_cmdline[0]);
else
free_and_replace(arg_cmdline[0], command);
}
if (!arg_description) {
_cleanup_free_ char *t = NULL;
if (strv_isempty(arg_cmdline))
t = strdup(arg_unit);
else if (startswith(arg_cmdline[0], "-")) {
/* Drop the login shell marker from the command line when generating the description,
* in order to minimize user confusion. */
_cleanup_strv_free_ char **l = strv_copy(arg_cmdline);
if (!l)
return log_oom();
r = free_and_strdup_warn(l + 0, l[0] + 1);
if (r < 0)
return r;
t = quote_command_line(l, SHELL_ESCAPE_EMPTY);
} else
t = quote_command_line(arg_cmdline, SHELL_ESCAPE_EMPTY);
if (!t)
return log_oom();
arg_description = strjoin("[", program_invocation_short_name, "] ", t);
if (!arg_description)
return log_oom();
}
r = connect_bus(&bus);
if (r < 0)
return r;
if (arg_scope)
return start_transient_scope(bus);
if (arg_path_property)
return start_transient_trigger(bus, ".path");
if (arg_socket_property)
return start_transient_trigger(bus, ".socket");
if (arg_with_timer)
return start_transient_trigger(bus, ".timer");
return start_transient_service(bus);
}
DEFINE_MAIN_FUNCTION_WITH_POSITIVE_FAILURE(run);
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