shutdownd: kill the old implementation

Not that all functionality has been ported over to logind, the old
implementation can be removed. There goes one of the oldest parts of
the systemd code base.

1 files changed, 0 insertions, 458 deletions

diff --git a/src/shutdownd/shutdownd.c b/src/shutdownd/shutdownd.c
deleted file mode 100644
index 8b857b55cb..0000000000
--- a/src/shutdownd/shutdownd.c
+++ /dev/null
@@ -1,458 +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 <poll.h>
-#include <sys/timerfd.h>
-#include <errno.h>
-#include <unistd.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"
-#include "fileio.h"
-#include "formats-util.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 ucred *ucred;
-        ssize_t n;
-
-        union shutdown_buffer b; /* We maintain our own copy here, in
-                                  * order not to corrupt the last message */
-        struct iovec iovec = {
-                .iov_base = &b,
-                .iov_len = sizeof(b) - 1,
-        };
-        union {
-                struct cmsghdr cmsghdr;
-                uint8_t buf[CMSG_SPACE(sizeof(struct ucred))];
-        } control = {};
-        struct msghdr msghdr = {
-                .msg_iov = &iovec,
-                .msg_iovlen = 1,
-                .msg_control = &control,
-                .msg_controllen = sizeof(control),
-        };
-
-        assert(fd >= 0);
-        assert(_b);
-
-        n = recvmsg(fd, &msghdr, MSG_DONTWAIT);
-        if (n < 0) {
-                if (errno == EAGAIN || errno == EINTR)
-                        return 0;
-
-                log_error_errno(errno, "recvmsg(): %m");
-                return -errno;
-        }
-
-        cmsg_close_all(&msghdr);
-
-        if (n == 0) {
-                log_error("Short read");
-                return -EIO;
-        }
-
-        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;
-        _cleanup_free_ 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)
-                utmp_wall(l, NULL, NULL, NULL, NULL);
-        else
-                log_error("Failed to allocate wall message");
-}
-
-_const_ static usec_t when_wall(usec_t n, usec_t elapse) {
-
-        static const struct {
-                usec_t delay;
-                usec_t interval;
-        } table[] = {
-                { 0,                    USEC_PER_MINUTE      },
-                { 10 * USEC_PER_MINUTE, 15 * USEC_PER_MINUTE },
-                { USEC_PER_HOUR,        30 * USEC_PER_MINUTE },
-                { 3 * USEC_PER_HOUR,    USEC_PER_HOUR        },
-        };
-
-        usec_t left, sub;
-        unsigned i = ELEMENTSOF(table) - 1;
-
-        /* If the time is already passed, then don't announce */
-        if (n >= elapse)
-                return 0;
-
-        left = elapse - n;
-        while (left < table[i].delay)
-                i--;
-        sub = (left / table[i].interval) * table[i].interval;
-
-        assert(sub < elapse);
-        return elapse - sub;
-}
-
-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;
-        _cleanup_fclose_ FILE *f = NULL;
-        _cleanup_free_ char *t = NULL, *temp_path = NULL;
-
-        assert(c);
-
-        r = mkdir_safe_label("/run/systemd/shutdown", 0755, 0, 0);
-        if (r < 0)
-                return log_error_errno(r, "Failed to create shutdown subdirectory: %m");
-
-        t = cescape(c->wall_message);
-        if (!t)
-                return log_oom();
-
-        r = fopen_temporary("/run/systemd/shutdown/scheduled", &f, &temp_path);
-        if (r < 0)
-                return log_error_errno(r, "Failed to save information about scheduled shutdowns: %m");
-
-        fchmod(fileno(f), 0644);
-
-        fprintf(f,
-                "USEC="USEC_FMT"\n"
-                "WARN_WALL=%i\n"
-                "MODE=%s\n",
-                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);
-
-        fflush(f);
-
-        if (ferror(f) || rename(temp_path, "/run/systemd/shutdown/scheduled") < 0) {
-                log_error_errno(errno, "Failed to write information about scheduled shutdowns: %m");
-                r = -errno;
-
-                unlink(temp_path);
-                unlink("/run/systemd/shutdown/scheduled");
-        }
-
-        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_errno(r, "Failed to read listening file descriptors from environment: %m");
-                return EXIT_FAILURE;
-        }
-
-        if (n_fds != 1) {
-                log_error("Need exactly one file descriptor.");
-                return EXIT_FAILURE;
-        }
-
-        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_errno(errno, "timerfd_create(): %m");
-                        goto finish;
-                }
-        }
-
-        log_debug("systemd-shutdownd running as pid "PID_FMT, 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_errno(errno, "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_errno(errno, "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_errno(errno, "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_errno(errno, "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 */
-                        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_errno(errno, "timerfd_settime(): %m");
-                                goto finish;
-                        }
-                }
-
-                if (pollfd[FD_NOLOGIN_TIMER].revents) {
-                        int e;
-
-                        log_info("Creating /run/nologin, blocking further logins...");
-
-                        e = write_string_file_atomic("/run/nologin", "System is going down.");
-                        if (e < 0)
-                                log_error_errno(e, "Failed to create /run/nologin: %m");
-                        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 "PID_FMT, getpid());
-
-finish:
-
-        for (i = 0; i < _FD_MAX; i++)
-                safe_close(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_errno(errno, "Failed to execute /sbin/shutdown: %m");
-        }
-
-        sd_notify(false,
-                  "STOPPING=\n"
-                  "STATUS=Exiting...");
-
-        return r;
-}