Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 316 deletions

diff --git a/src/core/shutdown.c b/src/core/shutdown.c
deleted file mode 100644
index cc8c57bd2d..0000000000
--- a/src/core/shutdown.c
+++ /dev/null
@@ -1,316 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 ProFUSION embedded systems
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 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
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/reboot.h>
-#include <linux/reboot.h>
-#include <sys/wait.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <sys/mount.h>
-#include <sys/syscall.h>
-#include <fcntl.h>
-#include <dirent.h>
-#include <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <stdbool.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "missing.h"
-#include "log.h"
-#include "umount.h"
-#include "util.h"
-#include "mkdir.h"
-#include "virt.h"
-#include "watchdog.h"
-#include "killall.h"
-
-#define FINALIZE_ATTEMPTS 50
-
-static int prepare_new_root(void) {
-        static const char dirs[] =
-                "/run/initramfs/oldroot\0"
-                "/run/initramfs/proc\0"
-                "/run/initramfs/sys\0"
-                "/run/initramfs/dev\0"
-                "/run/initramfs/run\0";
-
-        const char *dir;
-
-        if (mount("/run/initramfs", "/run/initramfs", NULL, MS_BIND, NULL) < 0) {
-                log_error("Failed to mount bind /run/initramfs on /run/initramfs: %m");
-                return -errno;
-        }
-
-        if (mount(NULL, "/run/initramfs", NULL, MS_PRIVATE, NULL) < 0) {
-                log_error("Failed to make /run/initramfs private mount: %m");
-                return -errno;
-        }
-
-        NULSTR_FOREACH(dir, dirs)
-                if (mkdir_p_label(dir, 0755) < 0 && errno != EEXIST) {
-                        log_error("Failed to mkdir %s: %m", dir);
-                        return -errno;
-                }
-
-        if (mount("/sys", "/run/initramfs/sys", NULL, MS_BIND, NULL) < 0) {
-                log_error("Failed to mount bind /sys on /run/initramfs/sys: %m");
-                return -errno;
-        }
-
-        if (mount("/proc", "/run/initramfs/proc", NULL, MS_BIND, NULL) < 0) {
-                log_error("Failed to mount bind /proc on /run/initramfs/proc: %m");
-                return -errno;
-        }
-
-        if (mount("/dev", "/run/initramfs/dev", NULL, MS_BIND, NULL) < 0) {
-                log_error("Failed to mount bind /dev on /run/initramfs/dev: %m");
-                return -errno;
-        }
-
-        if (mount("/run", "/run/initramfs/run", NULL, MS_BIND, NULL) < 0) {
-                log_error("Failed to mount bind /run on /run/initramfs/run: %m");
-                return -errno;
-        }
-
-        return 0;
-}
-
-static int pivot_to_new_root(void) {
-
-        if (chdir("/run/initramfs") < 0) {
-                log_error("Failed to change directory to /run/initramfs: %m");
-                return -errno;
-        }
-
-        /* Work-around for a kernel bug: for some reason the kernel
-         * refuses switching root if any file systems are mounted
-         * MS_SHARED. Hence remount them MS_PRIVATE here as a
-         * work-around.
-         *
-         * https://bugzilla.redhat.com/show_bug.cgi?id=847418 */
-        if (mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) < 0)
-                log_warning("Failed to make \"/\" private mount: %m");
-
-        if (pivot_root(".", "oldroot") < 0) {
-                log_error("pivot failed: %m");
-                /* only chroot if pivot root succeeded */
-                return -errno;
-        }
-
-        chroot(".");
-
-        setsid();
-        make_console_stdio();
-
-        log_info("Successfully changed into root pivot.");
-
-        return 0;
-}
-
-int main(int argc, char *argv[]) {
-        int cmd, r;
-        unsigned retries;
-        bool need_umount = true, need_swapoff = true, need_loop_detach = true, need_dm_detach = true;
-        bool in_container, use_watchdog = false;
-        char *arguments[3];
-
-        log_parse_environment();
-        log_set_target(LOG_TARGET_CONSOLE); /* syslog will die if not gone yet */
-        log_open();
-
-        umask(0022);
-
-        if (getpid() != 1) {
-                log_error("Not executed by init (pid 1).");
-                r = -EPERM;
-                goto error;
-        }
-
-        if (argc != 2) {
-                log_error("Invalid number of arguments.");
-                r = -EINVAL;
-                goto error;
-        }
-
-        in_container = detect_container(NULL) > 0;
-
-        if (streq(argv[1], "reboot"))
-                cmd = RB_AUTOBOOT;
-        else if (streq(argv[1], "poweroff"))
-                cmd = RB_POWER_OFF;
-        else if (streq(argv[1], "halt"))
-                cmd = RB_HALT_SYSTEM;
-        else if (streq(argv[1], "kexec"))
-                cmd = LINUX_REBOOT_CMD_KEXEC;
-        else {
-                log_error("Unknown action '%s'.", argv[1]);
-                r = -EINVAL;
-                goto error;
-        }
-
-        use_watchdog = !!getenv("WATCHDOG_USEC");
-
-        /* lock us into memory */
-        mlockall(MCL_CURRENT|MCL_FUTURE);
-
-        log_info("Sending SIGTERM to remaining processes...");
-        broadcast_signal(SIGTERM, true);
-
-        log_info("Sending SIGKILL to remaining processes...");
-        broadcast_signal(SIGKILL, true);
-
-        if (in_container) {
-                need_swapoff = false;
-                need_dm_detach = false;
-                need_loop_detach = false;
-        }
-
-        /* Unmount all mountpoints, swaps, and loopback devices */
-        for (retries = 0; retries < FINALIZE_ATTEMPTS; retries++) {
-                bool changed = false;
-
-                if (use_watchdog)
-                        watchdog_ping();
-
-                if (need_umount) {
-                        log_info("Unmounting file systems.");
-                        r = umount_all(&changed);
-                        if (r == 0)
-                                need_umount = false;
-                        else if (r > 0)
-                                log_info("Not all file systems unmounted, %d left.", r);
-                        else
-                                log_error("Failed to unmount file systems: %s", strerror(-r));
-                }
-
-                if (need_swapoff) {
-                        log_info("Disabling swaps.");
-                        r = swapoff_all(&changed);
-                        if (r == 0)
-                                need_swapoff = false;
-                        else if (r > 0)
-                                log_info("Not all swaps are turned off, %d left.", r);
-                        else
-                                log_error("Failed to turn off swaps: %s", strerror(-r));
-                }
-
-                if (need_loop_detach) {
-                        log_info("Detaching loop devices.");
-                        r = loopback_detach_all(&changed);
-                        if (r == 0)
-                                need_loop_detach = false;
-                        else if (r > 0)
-                                log_info("Not all loop devices detached, %d left.", r);
-                        else
-                                log_error("Failed to detach loop devices: %s", strerror(-r));
-                }
-
-                if (need_dm_detach) {
-                        log_info("Detaching DM devices.");
-                        r = dm_detach_all(&changed);
-                        if (r == 0)
-                                need_dm_detach = false;
-                        else if (r > 0)
-                                log_warning("Not all DM devices detached, %d left.", r);
-                        else
-                                log_error("Failed to detach DM devices: %s", strerror(-r));
-                }
-
-                if (!need_umount && !need_swapoff && !need_loop_detach && !need_dm_detach) {
-                        if (retries > 0)
-                                log_info("All filesystems, swaps, loop devices, DM devices detached.");
-                        /* Yay, done */
-                        break;
-                }
-
-                /* If in this iteration we didn't manage to
-                 * unmount/deactivate anything, we simply give up */
-                if (!changed) {
-                        log_error("Cannot finalize remaining file systems and devices, giving up.");
-                        break;
-                }
-
-                log_debug("Couldn't finalize remaining file systems and devices after %u retries, trying again.", retries+1);
-        }
-
-        if (retries >= FINALIZE_ATTEMPTS)
-                log_error("Too many iterations, giving up.");
-
-        arguments[0] = NULL;
-        arguments[1] = argv[1];
-        arguments[2] = NULL;
-        execute_directory(SYSTEM_SHUTDOWN_PATH, NULL, arguments);
-
-        if (!in_container &&
-            access("/run/initramfs/shutdown", X_OK) == 0) {
-
-                if (prepare_new_root() >= 0 &&
-                    pivot_to_new_root() >= 0) {
-                        execv("/shutdown", argv);
-                        log_error("Failed to execute shutdown binary: %m");
-                }
-        }
-
-        if (cmd == LINUX_REBOOT_CMD_KEXEC) {
-
-                if (!in_container) {
-                        /* We cheat and exec kexec to avoid doing all its work */
-                        pid_t pid = fork();
-
-                        if (pid < 0)
-                                log_error("Could not fork: %m. Falling back to normal reboot.");
-                        else if (pid > 0) {
-                                wait_for_terminate_and_warn("kexec", pid);
-                                log_warning("kexec failed. Falling back to normal reboot.");
-                        } else {
-                                /* Child */
-                                const char *args[3] = { "/sbin/kexec", "-e", NULL };
-                                execv(args[0], (char * const *) args);
-                                return EXIT_FAILURE;
-                        }
-                }
-
-                cmd = RB_AUTOBOOT;
-        }
-
-        reboot(cmd);
-
-        if (errno == EPERM && in_container) {
-                /* If we are in a container, and we lacked
-                 * CAP_SYS_BOOT just exit, this will kill our
-                 * container for good. */
-                log_error("Exiting container.");
-                exit(0);
-        }
-
-        log_error("Failed to invoke reboot(): %m");
-        r = -errno;
-
-  error:
-        log_error("Critical error while doing system shutdown: %s", strerror(-r));
-
-        freeze();
-        return EXIT_FAILURE;
-}