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auto-getty: rework auto console getty logic to work in conjunction with single user mode

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This commit is contained in:
Lennart Poettering 2010-08-17 03:29:46 +02:00
parent 16061c20dd
commit 5192bd1945
11 changed files with 237 additions and 47 deletions
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1
.gitignore vendored
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@ -1,3 +1,4 @@
systemd-auto-console-getty
systemd-shutdownd
systemd-random-seed
systemd-update-utmp

23
Makefile.am
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@ -72,7 +72,8 @@ rootlibexec_PROGRAMS = \
systemd-initctl \
systemd-update-utmp \
systemd-random-seed \
systemd-shutdownd
systemd-shutdownd \
systemd-auto-console-getty
noinst_PROGRAMS = \
test-engine \
@ -139,6 +140,7 @@ dist_systemunit_DATA = \
units/systemd-initctl.socket \
units/systemd-logger.socket \
units/systemd-shutdownd.socket \
units/systemd-auto-console-getty.service \
units/dev-hugepages.automount \
units/dev-hugepages.mount \
units/dev-mqueue.automount \
@ -164,6 +166,7 @@ nodist_systemunit_DATA = \
units/systemd-initctl.service \
units/systemd-logger.service \
units/systemd-shutdownd.service \
units/systemd-auto-console-getty.service \
units/systemd-update-utmp-runlevel.service \
units/systemd-update-utmp-shutdown.service \
units/systemd-random-seed-save.service \
@ -186,6 +189,7 @@ EXTRA_DIST = \
units/systemd-initctl.service.in \
units/systemd-logger.service.in \
units/systemd-shutdownd.service.in \
units/systemd-auto-console-getty.service.in \
units/systemd-update-utmp-runlevel.service.in \
units/systemd-update-utmp-shutdown.service.in \
units/systemd-random-seed-save.service.in \
@ -545,6 +549,18 @@ systemd_shutdownd_CFLAGS = \
systemd_shutdownd_LDADD = \
libsystemd-basic.la
systemd_auto_console_getty_SOURCES = \
src/auto-console-getty.c \
src/dbus-common.c
systemd_auto_console_getty_CFLAGS = \
$(AM_CFLAGS) \
$(DBUS_CFLAGS)
systemd_auto_console_getty_LDADD = \
libsystemd-basic.la \
$(DBUS_LIBS)
systemd_cgroups_agent_SOURCES = \
src/cgroups-agent.c \
src/dbus-common.c
@ -825,13 +841,14 @@ install-data-hook:
$(LN_S) $(systemunitdir)/reboot.target ctrl-alt-del.target && \
$(LN_S) $(systemunitdir)/rescue.target kbrequest.target )
( cd $(DESTDIR)$(pkgsysconfdir)/system/getty.target.wants && \
rm -f getty@tty1.service getty@tty2.service getty@tty3.service getty@tty4.service getty@tty5.service getty@tty6.service && \
rm -f getty@tty1.service getty@tty2.service getty@tty3.service getty@tty4.service getty@tty5.service getty@tty6.service systemd-auto-console-getty.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty1.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty2.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty3.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty4.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty5.service && \
$(LN_S) $(systemunitdir)/getty@.service getty@tty6.service )
$(LN_S) $(systemunitdir)/getty@.service getty@tty6.service && \
$(LN_S) $(systemunitdir)/systemd-auto-console-getty.service systemd-auto-console-getty.service )
( cd $(DESTDIR)$(pkgsysconfdir)/system/multi-user.target.wants && \
rm -f getty.target remote-fs.target && \
$(LN_S) $(systemunitdir)/getty.target getty.target && \

6
fixme
View File

@ -63,13 +63,13 @@
* io priority during initialization
* if a service fails too often, make the service enter maintainence mode, and the socket, too.
* if a service fails too often, make the service enter maintenance mode, and the socket, too.
* Ray: plymouth after/before getty? https://bugzilla.redhat.com/show_bug.cgi?id=623430
* be more forgiving when parsing unit files, when encountering incorrect lines with assignments
* add no-tab header to .h
* agetty darf nicht mit emergency.service kollidieren
* fix systemctl daemon-reload in part of boot
External:

189
src/auto-console-getty.c Normal file
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@ -0,0 +1,189 @@
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2010 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <string.h>
#include <stdlib.h>
#include <dbus/dbus.h>
#include "util.h"
#include "log.h"
#include "dbus-common.h"
static int spawn_getty(DBusConnection *bus, const char *console) {
DBusMessage *m = NULL, *reply = NULL;
DBusError error;
const char *fail = "fail";
char *name;
int r = -EIO;
dbus_error_init(&error);
assert(bus);
assert(console);
/* FIXME: we probably should escape the tty name properly here */
if (asprintf(&name, "getty@%s.service", console) < 0)
return -ENOMEM;
if (!(m = dbus_message_new_method_call("org.freedesktop.systemd1", "/org/freedesktop/systemd1", "org.freedesktop.systemd1.Manager", "StartUnit"))) {
log_error("Could not allocate message.");
goto finish;
}
if (!dbus_message_append_args(m,
DBUS_TYPE_STRING, &name,
DBUS_TYPE_STRING, &fail,
DBUS_TYPE_INVALID)) {
log_error("Could not attach target and flag information to message.");
goto finish;
}
if (!(reply = dbus_connection_send_with_reply_and_block(bus, m, -1, &error))) {
log_error("Failed to start unit: %s", error.message);
goto finish;
}
r = 0;
finish:
if (m)
dbus_message_unref(m);
if (reply)
dbus_message_unref(reply);
dbus_error_free(&error);
free(name);
return r;
}
static int parse_proc_cmdline_word(const char *word, char **console) {
assert(word);
if (startswith(word, "console=")) {
const char *k;
size_t l;
char *w = NULL;
k = word + 8;
l = strcspn(k, ",");
if (l < 4 ||
!startswith(k, "tty") ||
k[3+strspn(k+3, "0123456789")] != 0) {
if (!(w = strndup(k, l)))
return -ENOMEM;
}
free(*console);
*console = w;
}
return 0;
}
static int parse_proc_cmdline(char **console) {
char *line;
int r;
char *w;
size_t l;
char *state;
assert(console);
if ((r = read_one_line_file("/tmp/cmdline", &line)) < 0) {
log_warning("Failed to read /proc/cmdline, ignoring: %s", strerror(-r));
return 0;
}
FOREACH_WORD_QUOTED(w, l, line, state) {
char *word;
if (!(word = strndup(w, l))) {
r = -ENOMEM;
goto finish;
}
r = parse_proc_cmdline_word(word, console);
free(word);
if (r < 0)
goto finish;
}
r = 0;
finish:
free(line);
return r;
}
int main(int argc, char *argv[]) {
DBusError error;
int r = 1;
char *console = NULL;
DBusConnection *bus = NULL;
dbus_error_init(&error);
if (argc > 1) {
log_error("This program does not take arguments.");
return 1;
}
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
log_parse_environment();
log_open();
if (bus_connect(DBUS_BUS_SYSTEM, &bus, NULL, &error) < 0) {
log_error("Failed to get D-Bus connection: %s", error.message);
goto finish;
}
if (parse_proc_cmdline(&console) < 0)
goto finish;
if (console)
if (spawn_getty(bus, console) < 0)
goto finish;
r = 0;
finish:
free(console);
if (bus) {
dbus_connection_close(bus);
dbus_connection_unref(bus);
}
dbus_error_free(&error);
dbus_shutdown();
return r;
}

2
src/initctl.c
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@ -119,7 +119,7 @@ static void change_runlevel(Server *s, int runlevel) {
DBUS_TYPE_STRING, &target,
DBUS_TYPE_STRING, &replace,
DBUS_TYPE_INVALID)) {
log_error("Could not attach target and flag information to signal message.");
log_error("Could not attach target and flag information to message.");
goto finish;
}

39
src/main.c
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@ -57,7 +57,6 @@ static enum {
} arg_action = ACTION_RUN;
static char *arg_default_unit = NULL;
static char *arg_console = NULL;
static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
static bool arg_dump_core = true;
@ -245,6 +244,8 @@ static int parse_proc_cmdline_word(const char *word) {
"5", SPECIAL_RUNLEVEL5_TARGET
};
assert(word);
if (startswith(word, "systemd.unit="))
return set_default_unit(word + 13);
@ -336,26 +337,8 @@ static int parse_proc_cmdline_word(const char *word) {
} else if (streq(word, "nomodules"))
arg_nomodules = true;
else if (startswith(word, "console=")) {
const char *k;
size_t l;
char *w = NULL;
k = word + 8;
l = strcspn(k, ",");
if (l < 4 ||
!startswith(k, "tty") ||
k[3+strspn(k+3, "0123456789")] != 0) {
if (!(w = strndup(k, l)))
return -ENOMEM;
}
free(arg_console);
arg_console = w;
} else if (streq(word, "quiet")) {
else if (streq(word, "quiet")) {
arg_show_status = false;
arg_sysv_console = false;
} else {
@ -1061,21 +1044,6 @@ int main(int argc, char *argv[]) {
goto finish;
}
if (arg_console && arg_running_as == MANAGER_SYSTEM) {
char *name;
if (asprintf(&name, "getty@%s.service", arg_console) < 0)
log_error("Out of memory while generating console getty service name.");
else {
if ((r = manager_add_job_by_name(m, JOB_START, name, JOB_FAIL, false, &error, NULL)) < 0) {
log_error("Failed to start console getty target: %s", bus_error(&error, r));
dbus_error_free(&error);
}
free(name);
}
}
if (arg_action == ACTION_TEST) {
printf("-> By jobs:\n");
manager_dump_jobs(m, stdout, "\t");
@ -1121,7 +1089,6 @@ finish:
manager_free(m);
free(arg_default_unit);
free(arg_console);
dbus_shutdown();

16
units/systemd-auto-console-getty.service.in Normal file
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@ -0,0 +1,16 @@
# This file is part of systemd.
#
# systemd is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
[Unit]
Description=Automatically Spawn getty on Kernel Console
[Service]
Type=oneshot
ExecStart=@rootlibexecdir@/systemd-auto-console-getty
[Install]
WantedBy=getty.target

2
units/systemd-random-seed-load.service.in
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@ -14,7 +14,7 @@ Before=shutdown.target
[Service]
Type=oneshot
ExecStart=-@rootlibexecdir@/systemd-random-seed load
ExecStart=@rootlibexecdir@/systemd-random-seed load
[Install]
WantedBy=sysinit.target

2
units/systemd-random-seed-save.service.in
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@ -13,7 +13,7 @@ Conflicts=systemd-random-seed-save.service
[Service]
Type=oneshot
ExecStart=-@rootlibexecdir@/systemd-random-seed save
ExecStart=@rootlibexecdir@/systemd-random-seed save
[Install]
WantedBy=shutdown.target

2
units/systemd-update-utmp-runlevel.service.in
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@ -14,4 +14,4 @@ Before=shutdown.target
[Service]
Type=oneshot
ExecStart=-@rootlibexecdir@/systemd-update-utmp runlevel
ExecStart=@rootlibexecdir@/systemd-update-utmp runlevel

2
units/systemd-update-utmp-shutdown.service.in
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@ -13,4 +13,4 @@ Conflicts=systemd-update-utmp-runlevel.service
[Service]
Type=oneshot
ExecStart=-@rootlibexecdir@/systemd-update-utmp shutdown
ExecStart=@rootlibexecdir@/systemd-update-utmp shutdown