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manager: actually enable ctrl-alt-del/kbrequest request handling in the kernel
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parent
2e6c9e6bde
commit
e141400362
48
manager.c
48
manager.c
@ -28,6 +28,9 @@
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#include <sys/wait.h>
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#include <unistd.h>
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#include <sys/poll.h>
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#include <sys/reboot.h>
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#include <sys/ioctl.h>
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#include <linux/kd.h>
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#include "manager.h"
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#include "hashmap.h"
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@ -54,6 +57,8 @@ static int manager_setup_signals(Manager *m) {
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assert_se(sigaddset(&mask, SIGUSR1) == 0);
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assert_se(sigaddset(&mask, SIGUSR2) == 0);
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assert_se(sigaddset(&mask, SIGPIPE) == 0);
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assert_se(sigaddset(&mask, SIGPWR) == 0);
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assert_se(sigaddset(&mask, SIGTTIN) == 0);
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assert_se(sigprocmask(SIG_SETMASK, &mask, NULL) == 0);
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m->signal_watch.type = WATCH_SIGNAL;
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@ -67,6 +72,16 @@ static int manager_setup_signals(Manager *m) {
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if (epoll_ctl(m->epoll_fd, EPOLL_CTL_ADD, m->signal_watch.fd, &ev) < 0)
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return -errno;
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if (m->running_as == MANAGER_INIT) {
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/* Enable that we get SIGINT on control-alt-del */
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if (reboot(RB_DISABLE_CAD) < 0)
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log_warning("Failed to enable ctrl-alt-del handling: %s", strerror(errno));
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/* Enable that we get SIGWINCH on kbrequest */
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if (ioctl(0, KDSIGACCEPT, SIGWINCH) < 0)
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log_warning("Failed to enable kbrequest handling: %s", strerror(errno));
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}
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return 0;
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}
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@ -200,8 +215,7 @@ static int manager_find_paths(Manager *m) {
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return -ENOMEM;
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}
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/* FIXME: This should probably look for MANAGER_INIT, and exclude MANAGER_SYSTEM */
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if (m->running_as != MANAGER_SESSION) {
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if (m->running_as == MANAGER_INIT) {
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/* /etc/init.d/ compativility does not matter to users */
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if ((e = getenv("SYSTEMD_SYSVINIT_PATH")))
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@ -246,21 +260,9 @@ Manager* manager_new(void) {
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if (!(m = new0(Manager, 1)))
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return NULL;
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if (getpid() == 1)
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m->running_as = MANAGER_INIT;
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else if (getuid() == 0)
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m->running_as = MANAGER_SYSTEM;
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else
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m->running_as = MANAGER_SESSION;
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log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
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m->signal_watch.fd = m->mount_watch.fd = m->udev_watch.fd = m->epoll_fd = -1;
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m->current_job_id = 1; /* start as id #1, so that we can leave #0 around as "null-like" value */
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if (manager_find_paths(m) < 0)
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goto fail;
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if (!(m->units = hashmap_new(string_hash_func, string_compare_func)))
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goto fail;
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@ -276,6 +278,24 @@ Manager* manager_new(void) {
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if ((m->epoll_fd = epoll_create1(EPOLL_CLOEXEC)) < 0)
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goto fail;
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if (getpid() == 1)
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m->running_as = MANAGER_INIT;
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else if (getuid() == 0)
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m->running_as = MANAGER_SYSTEM;
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else
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m->running_as = MANAGER_SESSION;
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log_debug("systemd running in %s mode.", manager_running_as_to_string(m->running_as));
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if (manager_find_paths(m) < 0)
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goto fail;
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if (chdir("/") < 0)
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log_warning("Failed to chdir to /: %s", strerror(errno));
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/* Become a session leader if we aren't one yet. */
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setsid();
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if (manager_setup_signals(m) < 0)
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goto fail;
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