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>

2 files changed, 0 insertions, 479 deletions

diff --git a/src/shutdownd/Makefile b/src/shutdownd/Makefile
deleted file mode 120000
index d0b0e8e008..0000000000
--- a/src/shutdownd/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-../Makefile
\ No newline at end of file
diff --git a/src/shutdownd/shutdownd.c b/src/shutdownd/shutdownd.c
deleted file mode 100644
index c0747415fd..0000000000
--- a/src/shutdownd/shutdownd.c
+++ /dev/null
@@ -1,478 +0,0 @@
-/*-*- 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 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/socket.h>
-#include <sys/poll.h>
-#include <sys/types.h>
-#include <sys/timerfd.h>
-#include <assert.h>
-#include <string.h>
-#include <errno.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <stddef.h>
-
-#include <systemd/sd-daemon.h>
-#include <systemd/sd-shutdown.h>
-
-#include "log.h"
-#include "macro.h"
-#include "util.h"
-#include "utmp-wtmp.h"
-#include "mkdir.h"
-
-union shutdown_buffer {
-        struct sd_shutdown_command command;
-        char space[offsetof(struct sd_shutdown_command, wall_message) + LINE_MAX];
-};
-
-static int read_packet(int fd, union shutdown_buffer *_b) {
-        struct msghdr msghdr;
-        struct iovec iovec;
-        struct ucred *ucred;
-        union {
-                struct cmsghdr cmsghdr;
-                uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
-        } control;
-        ssize_t n;
-        union shutdown_buffer b; /* We maintain our own copy here, in order not to corrupt the last message */
-
-        assert(fd >= 0);
-        assert(_b);
-
-        zero(iovec);
-        iovec.iov_base = &b;
-        iovec.iov_len = sizeof(b) - 1;
-
-        zero(control);
-        zero(msghdr);
-        msghdr.msg_iov = &iovec;
-        msghdr.msg_iovlen = 1;
-        msghdr.msg_control = &control;
-        msghdr.msg_controllen = sizeof(control);
-
-        n = recvmsg(fd, &msghdr, MSG_DONTWAIT);
-        if (n <= 0) {
-                if (n == 0) {
-                        log_error("Short read");
-                        return -EIO;
-                }
-
-                if (errno == EAGAIN || errno == EINTR)
-                        return 0;
-
-                log_error("recvmsg(): %m");
-                return -errno;
-        }
-
-        if (msghdr.msg_controllen < CMSG_LEN(sizeof(struct ucred)) ||
-            control.cmsghdr.cmsg_level != SOL_SOCKET ||
-            control.cmsghdr.cmsg_type != SCM_CREDENTIALS ||
-            control.cmsghdr.cmsg_len != CMSG_LEN(sizeof(struct ucred))) {
-                log_warning("Received message without credentials. Ignoring.");
-                return 0;
-        }
-
-        ucred = (struct ucred*) CMSG_DATA(&control.cmsghdr);
-        if (ucred->uid != 0) {
-                log_warning("Got request from unprivileged user. Ignoring.");
-                return 0;
-        }
-
-        if ((size_t) n < offsetof(struct sd_shutdown_command, wall_message)) {
-                log_warning("Message has invalid size. Ignoring.");
-                return 0;
-        }
-
-        if (b.command.mode != SD_SHUTDOWN_NONE &&
-            b.command.mode != SD_SHUTDOWN_REBOOT &&
-            b.command.mode != SD_SHUTDOWN_POWEROFF &&
-            b.command.mode != SD_SHUTDOWN_HALT &&
-            b.command.mode != SD_SHUTDOWN_KEXEC) {
-                log_warning("Message has invalid mode. Ignoring.");
-                return 0;
-        }
-
-        b.space[n] = 0;
-
-        *_b = b;
-        return 1;
-}
-
-static void warn_wall(usec_t n, struct sd_shutdown_command *c) {
-        char date[FORMAT_TIMESTAMP_MAX];
-        const char *prefix;
-        char *l = NULL;
-
-        assert(c);
-        assert(c->warn_wall);
-
-        if (n >= c->usec)
-                return;
-
-        if (c->mode == SD_SHUTDOWN_HALT)
-                prefix = "The system is going down for system halt at ";
-        else if (c->mode == SD_SHUTDOWN_POWEROFF)
-                prefix = "The system is going down for power-off at ";
-        else if (c->mode == SD_SHUTDOWN_REBOOT)
-                prefix = "The system is going down for reboot at ";
-        else if (c->mode == SD_SHUTDOWN_KEXEC)
-                prefix = "The system is going down for kexec reboot at ";
-        else if (c->mode == SD_SHUTDOWN_NONE)
-                prefix = "The system shutdown has been cancelled at ";
-        else
-                assert_not_reached("Unknown mode!");
-
-        if (asprintf(&l, "%s%s%s%s!", c->wall_message, c->wall_message[0] ? "\n" : "",
-                     prefix, format_timestamp(date, sizeof(date), c->usec)) < 0)
-                log_error("Failed to allocate wall message");
-        else {
-                utmp_wall(l, NULL);
-                free(l);
-        }
-}
-
-static usec_t when_wall(usec_t n, usec_t elapse) {
-
-        static const struct {
-                usec_t delay;
-                usec_t interval;
-        } table[] = {
-                { 10 * USEC_PER_MINUTE, USEC_PER_MINUTE      },
-                { USEC_PER_HOUR,        15 * USEC_PER_MINUTE },
-                { 3 * USEC_PER_HOUR,    30 * USEC_PER_MINUTE }
-        };
-
-        usec_t left, sub;
-        unsigned i;
-
-        /* If the time is already passed, then don't announce */
-        if (n >= elapse)
-                return 0;
-
-        left = elapse - n;
-        for (i = 0; i < ELEMENTSOF(table); i++)
-                if (n + table[i].delay >= elapse) {
-                        sub = ((left / table[i].interval) * table[i].interval);
-                        break;
-                }
-
-        if (i >= ELEMENTSOF(table))
-                sub = ((left / USEC_PER_HOUR) * USEC_PER_HOUR);
-
-        return elapse > sub ? elapse - sub : 1;
-}
-
-static usec_t when_nologin(usec_t elapse) {
-        return elapse > 5*USEC_PER_MINUTE ? elapse - 5*USEC_PER_MINUTE : 1;
-}
-
-static const char *mode_to_string(enum sd_shutdown_mode m) {
-        switch (m) {
-        case SD_SHUTDOWN_REBOOT:
-                return "reboot";
-        case SD_SHUTDOWN_POWEROFF:
-                return "poweroff";
-        case SD_SHUTDOWN_HALT:
-                return "halt";
-        case SD_SHUTDOWN_KEXEC:
-                return "kexec";
-        default:
-                return NULL;
-        }
-}
-
-static int update_schedule_file(struct sd_shutdown_command *c) {
-        int r;
-        FILE *f;
-        char *temp_path, *t;
-
-        assert(c);
-
-        r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
-        if (r < 0) {
-                log_error("Failed to create shutdown subdirectory: %s", strerror(-r));
-                return r;
-        }
-
-        t = cescape(c->wall_message);
-        if (!t)
-                return log_oom();
-
-        r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
-        if (r < 0) {
-                log_error("Failed to save information about scheduled shutdowns: %s", strerror(-r));
-                free(t);
-                return r;
-        }
-
-        fchmod(fileno(f), 0644);
-
-        fprintf(f,
-                "USEC=%llu\n"
-                "WARN_WALL=%i\n"
-                "MODE=%s\n",
-                (unsigned long long) c->usec,
-                c->warn_wall,
-                mode_to_string(c->mode));
-
-        if (c->dry_run)
-                fputs("DRY_RUN=1\n", f);
-
-        if (!isempty(t))
-                fprintf(f, "WALL_MESSAGE=%s\n", t);
-
-        free(t);
-
-        fflush(f);
-
-        if (ferror(f) || rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
-                log_error("Failed to write information about scheduled shutdowns: %m");
-                r = -errno;
-
-                unlink(temp_path);
-                unlink("/run/systemd/shutdown/scheduled");
-        }
-
-        fclose(f);
-        free(temp_path);
-
-        return r;
-}
-
-static bool scheduled(struct sd_shutdown_command *c) {
-        return c->usec > 0 && c->mode != SD_SHUTDOWN_NONE;
-}
-
-int main(int argc, char *argv[]) {
-        enum {
-                FD_SOCKET,
-                FD_WALL_TIMER,
-                FD_NOLOGIN_TIMER,
-                FD_SHUTDOWN_TIMER,
-                _FD_MAX
-        };
-
-        int r = EXIT_FAILURE, n_fds;
-        union shutdown_buffer b;
-        struct pollfd pollfd[_FD_MAX];
-        bool exec_shutdown = false, unlink_nologin = false;
-        unsigned i;
-
-        if (getppid() != 1) {
-                log_error("This program should be invoked by init only.");
-                return EXIT_FAILURE;
-        }
-
-        if (argc > 1) {
-                log_error("This program does not take arguments.");
-                return EXIT_FAILURE;
-        }
-
-        log_set_target(LOG_TARGET_AUTO);
-        log_parse_environment();
-        log_open();
-
-        umask(0022);
-
-        n_fds = sd_listen_fds(true);
-        if (n_fds < 0) {
-                log_error("Failed to read listening file descriptors from environment: %s", strerror(-r));
-                return EXIT_FAILURE;
-        }
-
-        if (n_fds != 1) {
-                log_error("Need exactly one file descriptor.");
-                return EXIT_FAILURE;
-        }
-
-        zero(b);
-        zero(pollfd);
-
-        pollfd[FD_SOCKET].fd = SD_LISTEN_FDS_START;
-        pollfd[FD_SOCKET].events = POLLIN;
-
-        for (i = FD_WALL_TIMER; i < _FD_MAX; i++) {
-                pollfd[i].events = POLLIN;
-                pollfd[i].fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK|TFD_CLOEXEC);
-                if (pollfd[i].fd < 0) {
-                        log_error("timerfd_create(): %m");
-                        goto finish;
-                }
-        }
-
-        log_debug("systemd-shutdownd running as pid %lu", (unsigned long) getpid());
-
-        sd_notify(false,
-                  "READY=1\n"
-                  "STATUS=Processing requests...");
-
-        for (;;) {
-                int k;
-                usec_t n;
-
-                k = poll(pollfd, _FD_MAX, scheduled(&b.command) ? -1 : 0);
-                if (k < 0) {
-
-                        if (errno == EAGAIN || errno == EINTR)
-                                continue;
-
-                        log_error("poll(): %m");
-                        goto finish;
-                }
-
-                /* Exit on idle */
-                if (k == 0)
-                        break;
-
-                n = now(CLOCK_REALTIME);
-
-                if (pollfd[FD_SOCKET].revents) {
-
-                        k = read_packet(pollfd[FD_SOCKET].fd, &b);
-                        if (k < 0)
-                                goto finish;
-                        else if (k > 0) {
-                                struct itimerspec its;
-                                char date[FORMAT_TIMESTAMP_MAX];
-
-                                if (!scheduled(&b.command)) {
-                                        log_info("Shutdown canceled.");
-                                        if (b.command.warn_wall)
-                                                warn_wall(0, &b.command);
-                                        break;
-                                }
-
-                                zero(its);
-                                if (b.command.warn_wall) {
-                                        /* Send wall messages every so often */
-                                        timespec_store(&its.it_value, when_wall(n, b.command.usec));
-
-                                        /* Warn immediately if less than 15 minutes are left */
-                                        if (n < b.command.usec &&
-                                            n + 15*USEC_PER_MINUTE >= b.command.usec)
-                                                warn_wall(n, &b.command);
-                                }
-                                if (timerfd_settime(pollfd[FD_WALL_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
-                                        log_error("timerfd_settime(): %m");
-                                        goto finish;
-                                }
-
-                                /* Disallow logins 5 minutes prior to shutdown */
-                                zero(its);
-                                timespec_store(&its.it_value, when_nologin(b.command.usec));
-                                if (timerfd_settime(pollfd[FD_NOLOGIN_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
-                                        log_error("timerfd_settime(): %m");
-                                        goto finish;
-                                }
-
-                                /* Shutdown after the specified time is reached */
-                                zero(its);
-                                timespec_store(&its.it_value, b.command.usec);
-                                if (timerfd_settime(pollfd[FD_SHUTDOWN_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
-                                        log_error("timerfd_settime(): %m");
-                                        goto finish;
-                                }
-
-                                update_schedule_file(&b.command);
-
-                                sd_notifyf(false,
-                                           "STATUS=Shutting down at %s (%s)...",
-                                           format_timestamp(date, sizeof(date), b.command.usec),
-                                           mode_to_string(b.command.mode));
-
-                                log_info("Shutting down at %s (%s)...", date, mode_to_string(b.command.mode));
-                        }
-                }
-
-                if (pollfd[FD_WALL_TIMER].revents) {
-                        struct itimerspec its;
-
-                        warn_wall(n, &b.command);
-                        flush_fd(pollfd[FD_WALL_TIMER].fd);
-
-                        /* Restart timer */
-                        zero(its);
-                        timespec_store(&its.it_value, when_wall(n, b.command.usec));
-                        if (timerfd_settime(pollfd[FD_WALL_TIMER].fd, TFD_TIMER_ABSTIME, &its, NULL) < 0) {
-                                log_error("timerfd_settime(): %m");
-                                goto finish;
-                        }
-                }
-
-                if (pollfd[FD_NOLOGIN_TIMER].revents) {
-                        int e;
-
-                        log_info("Creating /run/nologin, blocking further logins...");
-
-                        e = write_one_line_file_atomic("/run/nologin", "System is going down.");
-                        if (e < 0)
-                                log_error("Failed to create /run/nologin: %s", strerror(-e));
-                        else
-                                unlink_nologin = true;
-
-                        flush_fd(pollfd[FD_NOLOGIN_TIMER].fd);
-                }
-
-                if (pollfd[FD_SHUTDOWN_TIMER].revents) {
-                        exec_shutdown = true;
-                        goto finish;
-                }
-        }
-
-        r = EXIT_SUCCESS;
-
-        log_debug("systemd-shutdownd stopped as pid %lu", (unsigned long) getpid());
-
-finish:
-
-        for (i = 0; i < _FD_MAX; i++)
-                if (pollfd[i].fd >= 0)
-                        close_nointr_nofail(pollfd[i].fd);
-
-        if (unlink_nologin)
-                unlink("/run/nologin");
-
-        unlink("/run/systemd/shutdown/scheduled");
-
-        if (exec_shutdown && !b.command.dry_run) {
-                char sw[3];
-
-                sw[0] = '-';
-                sw[1] = b.command.mode;
-                sw[2] = 0;
-
-                execl(SYSTEMCTL_BINARY_PATH,
-                      "shutdown",
-                      sw,
-                      "now",
-                      (b.command.warn_wall && b.command.wall_message[0]) ? b.command.wall_message :
-                      (b.command.warn_wall ? NULL : "--no-wall"),
-                      NULL);
-
-                log_error("Failed to execute /sbin/shutdown: %m");
-        }
-
-        sd_notify(false,
-                  "STATUS=Exiting...");
-
-        return r;
-}