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main: add a native implementation of the 'nomodules' kernel option understood by fedora init scripts

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This commit is contained in:
Lennart Poettering 2010-07-06 20:21:08 +02:00
parent 057fbb5885
commit fa0f4d8a3a
5 changed files with 117 additions and 47 deletions
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1
Makefile.am
View file

@ -267,6 +267,7 @@ libsystemd_core_la_SOURCES = \
src/hostname-setup.c \
src/loopback-setup.c \
src/kmod-setup.c \
src/modprobe-setup.c \
src/utmp-wtmp.c \
src/specifier.c \
src/unit-name.c \

1
src/dbus-manager.c
View file

@ -750,7 +750,6 @@ static DBusHandlerResult bus_manager_message_handler(DBusConnection *connection,
DBUS_TYPE_OBJECT_PATH, &path,
DBUS_TYPE_INVALID))
goto oom;
}
free(path);

97
src/main.c
View file

@ -38,6 +38,7 @@
#include "hostname-setup.h"
#include "loopback-setup.h"
#include "kmod-setup.h"
#include "modprobe-setup.h"
#include "load-fragment.h"
#include "fdset.h"
#include "special.h"
@ -48,15 +49,17 @@ static enum {
ACTION_TEST,
ACTION_DUMP_CONFIGURATION_ITEMS,
ACTION_DONE
} action = ACTION_RUN;
} arg_action = ACTION_RUN;
static char *default_unit = NULL;
static ManagerRunningAs running_as = _MANAGER_RUNNING_AS_INVALID;
static char *arg_default_unit = NULL;
static ManagerRunningAs arg_running_as = _MANAGER_RUNNING_AS_INVALID;
static bool arg_dump_core = true;
static bool arg_crash_shell = false;
static int arg_crash_chvt = -1;
static bool arg_confirm_spawn = false;
static bool arg_nomodules = false;
static bool dump_core = true;
static bool crash_shell = false;
static int crash_chvt = -1;
static bool confirm_spawn = false;
static FILE* serialization = NULL;
_noreturn_ static void freeze(void) {
@ -69,7 +72,7 @@ static void nop_handler(int sig) {
_noreturn_ static void crash(int sig) {
if (!dump_core)
if (!arg_dump_core)
log_error("Caught <%s>, not dumping core.", strsignal(sig));
else {
struct sigaction sa;
@ -120,10 +123,10 @@ _noreturn_ static void crash(int sig) {
}
}
if (crash_chvt)
chvt(crash_chvt);
if (arg_crash_chvt)
chvt(arg_crash_chvt);
if (crash_shell) {
if (arg_crash_shell) {
struct sigaction sa;
pid_t pid;
@ -215,8 +218,8 @@ static int set_default_unit(const char *u) {
if (!(c = strdup(u)))
return -ENOMEM;
free(default_unit);
default_unit = c;
free(arg_default_unit);
arg_default_unit = c;
return 0;
}
@ -263,7 +266,7 @@ static int parse_proc_cmdline_word(const char *word) {
if ((r = parse_boolean(word + 18)) < 0)
log_warning("Failed to parse dump core switch %s, Ignoring.", word + 18);
else
dump_core = r;
arg_dump_core = r;
} else if (startswith(word, "systemd.crash_shell=")) {
int r;
@ -271,8 +274,7 @@ static int parse_proc_cmdline_word(const char *word) {
if ((r = parse_boolean(word + 20)) < 0)
log_warning("Failed to parse crash shell switch %s, Ignoring.", word + 20);
else
crash_shell = r;
arg_crash_shell = r;
} else if (startswith(word, "systemd.confirm_spawn=")) {
int r;
@ -280,7 +282,7 @@ static int parse_proc_cmdline_word(const char *word) {
if ((r = parse_boolean(word + 22)) < 0)
log_warning("Failed to parse confirm spawn switch %s, Ignoring.", word + 22);
else
confirm_spawn = r;
arg_confirm_spawn = r;
} else if (startswith(word, "systemd.crash_chvt=")) {
int k;
@ -288,7 +290,7 @@ static int parse_proc_cmdline_word(const char *word) {
if (safe_atoi(word + 19, &k) < 0)
log_warning("Failed to parse crash chvt switch %s, Ignoring.", word + 19);
else
crash_chvt = k;
arg_crash_chvt = k;
} else if (startswith(word, "systemd.")) {
@ -306,7 +308,9 @@ static int parse_proc_cmdline_word(const char *word) {
"systemd.crash_chvt=N Change to VT #N on crash\n"
"systemd.confirm_spawn=0|1 Confirm every process spawn");
} else {
} else if (streq(word, "nomodules"))
arg_nomodules = true;
else {
unsigned i;
/* SysV compatibility */
@ -451,20 +455,20 @@ static int parse_argv(int argc, char *argv[]) {
return -EINVAL;
}
running_as = as;
arg_running_as = as;
break;
}
case ARG_TEST:
action = ACTION_TEST;
arg_action = ACTION_TEST;
break;
case ARG_DUMP_CONFIGURATION_ITEMS:
action = ACTION_DUMP_CONFIGURATION_ITEMS;
arg_action = ACTION_DUMP_CONFIGURATION_ITEMS;
break;
case ARG_CONFIRM_SPAWN:
confirm_spawn = true;
arg_confirm_spawn = true;
break;
case ARG_DESERIALIZE: {
@ -506,12 +510,12 @@ static int parse_argv(int argc, char *argv[]) {
if (!i[0] && optarg)
log_error("Unknown interface %s.", optarg);
action = ACTION_DONE;
arg_action = ACTION_DONE;
break;
}
case 'h':
action = ACTION_HELP;
arg_action = ACTION_HELP;
break;
case '?':
@ -526,7 +530,7 @@ static int parse_argv(int argc, char *argv[]) {
* ignore and unconditionally read from
* /proc/cmdline. However, we need to ignore those arguments
* here. */
if (running_as != MANAGER_SYSTEM && optind < argc) {
if (arg_running_as != MANAGER_SYSTEM && optind < argc) {
log_error("Excess arguments.");
return -EINVAL;
}
@ -631,10 +635,10 @@ int main(int argc, char *argv[]) {
log_set_max_level(LOG_DEBUG);
if (getpid() == 1) {
running_as = MANAGER_SYSTEM;
arg_running_as = MANAGER_SYSTEM;
log_set_target(LOG_TARGET_SYSLOG_OR_KMSG);
} else {
running_as = MANAGER_SESSION;
arg_running_as = MANAGER_SESSION;
log_set_target(LOG_TARGET_CONSOLE);
}
@ -653,7 +657,7 @@ int main(int argc, char *argv[]) {
/* If we are init, we can block sigkill. Yay. */
ignore_signals(SIGNALS_IGNORE, -1);
if (running_as == MANAGER_SYSTEM)
if (arg_running_as == MANAGER_SYSTEM)
if (parse_proc_cmdline() < 0)
goto finish;
@ -662,19 +666,19 @@ int main(int argc, char *argv[]) {
if (parse_argv(argc, argv) < 0)
goto finish;
if (action == ACTION_HELP) {
if (arg_action == ACTION_HELP) {
retval = help();
goto finish;
} else if (action == ACTION_DUMP_CONFIGURATION_ITEMS) {
} else if (arg_action == ACTION_DUMP_CONFIGURATION_ITEMS) {
unit_dump_config_items(stdout);
retval = 0;
goto finish;
} else if (action == ACTION_DONE) {
} else if (arg_action == ACTION_DONE) {
retval = 0;
goto finish;
}
assert_se(action == ACTION_RUN || action == ACTION_TEST);
assert_se(arg_action == ACTION_RUN || arg_action == ACTION_TEST);
/* Remember open file descriptors for later deserialization */
if (serialization) {
@ -690,12 +694,12 @@ int main(int argc, char *argv[]) {
/* Set up PATH unless it is already set */
setenv("PATH",
"/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
running_as == MANAGER_SYSTEM);
arg_running_as == MANAGER_SYSTEM);
/* Move out of the way, so that we won't block unmounts */
assert_se(chdir("/") == 0);
if (running_as == MANAGER_SYSTEM) {
if (arg_running_as == MANAGER_SYSTEM) {
/* Become a session leader if we aren't one yet. */
setsid();
@ -708,7 +712,7 @@ int main(int argc, char *argv[]) {
/* Reset the console, but only if this is really init and we
* are freshly booted */
if (running_as == MANAGER_SYSTEM && action == ACTION_RUN) {
if (arg_running_as == MANAGER_SYSTEM && arg_action == ACTION_RUN) {
console_setup(getpid() == 1 && !serialization);
make_null_stdio();
}
@ -721,15 +725,16 @@ int main(int argc, char *argv[]) {
if (getpid() == 1)
install_crash_handler();
log_debug("systemd running in %s mode.", manager_running_as_to_string(running_as));
log_debug(PACKAGE_STRING " running in %s mode.", manager_running_as_to_string(arg_running_as));
if (running_as == MANAGER_SYSTEM) {
if (arg_running_as == MANAGER_SYSTEM) {
modprobe_setup(arg_nomodules);
kmod_setup();
hostname_setup();
loopback_setup();
}
if ((r = manager_new(running_as, confirm_spawn, &m)) < 0) {
if ((r = manager_new(arg_running_as, arg_confirm_spawn, &m)) < 0) {
log_error("Failed to allocate manager object: %s", strerror(-r));
goto finish;
}
@ -749,9 +754,9 @@ int main(int argc, char *argv[]) {
fclose(serialization);
serialization = NULL;
} else {
log_debug("Activating default unit: %s", default_unit);
log_debug("Activating default unit: %s", arg_default_unit);
if ((r = manager_load_unit(m, default_unit, NULL, &target)) < 0) {
if ((r = manager_load_unit(m, arg_default_unit, NULL, &target)) < 0) {
log_error("Failed to load default target: %s", strerror(-r));
log_info("Trying to load rescue target...");
@ -761,7 +766,7 @@ int main(int argc, char *argv[]) {
}
}
if (action == ACTION_TEST) {
if (arg_action == ACTION_TEST) {
printf("-> By units:\n");
manager_dump_units(m, stdout, "\t");
}
@ -771,7 +776,7 @@ int main(int argc, char *argv[]) {
goto finish;
}
if (action == ACTION_TEST) {
if (arg_action == ACTION_TEST) {
printf("-> By jobs:\n");
manager_dump_jobs(m, stdout, "\t");
retval = 0;
@ -814,7 +819,7 @@ finish:
if (m)
manager_free(m);
free(default_unit);
free(arg_default_unit);
dbus_shutdown();
@ -835,7 +840,7 @@ finish:
args[i++] = log_target_to_string(log_get_target());
args[i++] = "--running-as";
args[i++] = manager_running_as_to_string(running_as);
args[i++] = manager_running_as_to_string(arg_running_as);
snprintf(sfd, sizeof(sfd), "%i", fileno(serialization));
char_array_0(sfd);
@ -843,7 +848,7 @@ finish:
args[i++] = "--deserialize";
args[i++] = sfd;
if (confirm_spawn)
if (arg_confirm_spawn)
args[i++] = "--confirm-spawn";
args[i++] = NULL;

36
src/modprobe-setup.c Normal file
View file

@ -0,0 +1,36 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
/***
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 "modprobe-setup.h"
#include "util.h"
int modprobe_setup(bool nomodules) {
int r;
if (!nomodules)
return 0;
if ((r = write_one_line_file("/proc/sys/kernel/modprobe", "/bin/true")) < 0)
log_error("Failed to write /proc/sys/kernel/modprobe: %m");
return r;
}

29
src/modprobe-setup.h Normal file
View file

@ -0,0 +1,29 @@
/*-*- Mode: C; c-basic-offset: 8 -*-*/
#ifndef foomodprobesetuphfoo
#define foomodprobesetuphfoo
/***
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 <stdbool.h>
int modprobe_setup(bool arg_nomodules);
#endif