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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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src/auto-console-getty.c
+189
View File
@@ -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;
}
src/initctl.c
+1 -1
View File
@@ -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;
}
src/main.c
+3 -36
View File
@@ -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();