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manager: actually enable ctrl-alt-del/kbrequest request handling in the kernel
author
Lennart Poettering
<lennart@poettering.net>
Sun, 14 Feb 2010 21:39:40 +0000
(22:39 +0100)
committer
Lennart Poettering
<lennart@poettering.net>
Sun, 14 Feb 2010 21:39:40 +0000
(22:39 +0100)
manager.c
patch
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diff --git
a/manager.c
b/manager.c
index cb447568917026a22ceabc76bfa81c4065f86e44..4f389793559e77a28d57118babe9326d0a606c07 100644
(file)
--- a/
manager.c
+++ b/
manager.c
@@
-28,6
+28,9
@@
#include <sys/wait.h>
#include <unistd.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <unistd.h>
#include <sys/poll.h>
+#include <sys/reboot.h>
+#include <sys/ioctl.h>
+#include <linux/kd.h>
#include "manager.h"
#include "hashmap.h"
#include "manager.h"
#include "hashmap.h"
@@
-54,6
+57,8
@@
static int manager_setup_signals(Manager *m) {
assert_se(sigaddset(&mask, SIGUSR1) == 0);
assert_se(sigaddset(&mask, SIGUSR2) == 0);
assert_se(sigaddset(&mask, SIGPIPE) == 0);
assert_se(sigaddset(&mask, SIGUSR1) == 0);
assert_se(sigaddset(&mask, SIGUSR2) == 0);
assert_se(sigaddset(&mask, SIGPIPE) == 0);
+ assert_se(sigaddset(&mask, SIGPWR) == 0);
+ assert_se(sigaddset(&mask, SIGTTIN) == 0);
assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
m->signal_watch.type = WATCH_SIGNAL;
assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
m->signal_watch.type = WATCH_SIGNAL;
@@
-67,6
+72,16
@@
static int manager_setup_signals(Manager *m) {
if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
return -errno;
if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
return -errno;
+ if (m->running_as == MANAGER_INIT) {
+ /* Enable that we get SIGINT on control-alt-del */
+ if (reboot(RB_DISABLE_CAD) < 0)
+ log_warning("Failed to enable ctrl-alt-del handling: %s", strerror(errno));
+
+ /* Enable that we get SIGWINCH on kbrequest */
+ if (ioctl(0, KDSIGACCEPT, SIGWINCH) < 0)
+ log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
+ }
+
return 0;
}
return 0;
}
@@
-200,8
+215,7
@@
static int manager_find_paths(Manager *m) {
return -ENOMEM;
}
return -ENOMEM;
}
- /* FIXME: This should probably look for MANAGER_INIT, and exclude MANAGER_SYSTEM */
- if (m->running_as != MANAGER_SESSION) {
+ if (m->running_as == MANAGER_INIT) {
/* /etc/init.d/ compativility does not matter to users */
if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
/* /etc/init.d/ compativility does not matter to users */
if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
@@
-246,21
+260,9
@@
Manager* manager_new(void) {
if (!(m = new0(Manager, 1)))
return NULL;
if (!(m = new0(Manager, 1)))
return NULL;
- if (getpid() == 1)
- m->running_as = MANAGER_INIT;
- else if (getuid() == 0)
- m->running_as = MANAGER_SYSTEM;
- else
- m->running_as = MANAGER_SESSION;
-
- log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
-
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
- if (manager_find_paths(m) < 0)
- goto fail;
-
if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
goto fail;
if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
goto fail;
@@
-276,6
+278,24
@@
Manager* manager_new(void) {
if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
goto fail;
if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
goto fail;
+ if (getpid() == 1)
+ m->running_as = MANAGER_INIT;
+ else if (getuid() == 0)
+ m->running_as = MANAGER_SYSTEM;
+ else
+ m->running_as = MANAGER_SESSION;
+
+ log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
+
+ if (manager_find_paths(m) < 0)
+ goto fail;
+
+ if (chdir("/") < 0)
+ log_warning("Failed to chdir to /: %s", strerror(errno));
+
+ /* Become a session leader if we aren't one yet. */
+ setsid();
+
if (manager_setup_signals(m) < 0)
goto fail;
if (manager_setup_signals(m) < 0)
goto fail;