./tools/notsd-move

1 files changed, 0 insertions, 876 deletions

diff --git a/src/basic/util.c b/src/basic/util.c
deleted file mode 100644
index ec7939dc83..0000000000
--- a/src/basic/util.c
+++ /dev/null
@@ -1,876 +0,0 @@
-/***
-  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 <alloca.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <sched.h>
-#include <signal.h>
-#include <stdarg.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/prctl.h>
-#include <sys/statfs.h>
-#include <sys/sysmacros.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "build.h"
-#include "cgroup-util.h"
-#include "def.h"
-#include "dirent-util.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "formats-util.h"
-#include "hashmap.h"
-#include "hostname-util.h"
-#include "log.h"
-#include "macro.h"
-#include "missing.h"
-#include "parse-util.h"
-#include "path-util.h"
-#include "process-util.h"
-#include "set.h"
-#include "signal-util.h"
-#include "stat-util.h"
-#include "string-util.h"
-#include "strv.h"
-#include "time-util.h"
-#include "umask-util.h"
-#include "user-util.h"
-#include "util.h"
-
-/* Put this test here for a lack of better place */
-assert_cc(EAGAIN == EWOULDBLOCK);
-
-int saved_argc = 0;
-char **saved_argv = NULL;
-static int saved_in_initrd = -1;
-
-size_t page_size(void) {
-        static thread_local size_t pgsz = 0;
-        long r;
-
-        if (_likely_(pgsz > 0))
-                return pgsz;
-
-        r = sysconf(_SC_PAGESIZE);
-        assert(r > 0);
-
-        pgsz = (size_t) r;
-        return pgsz;
-}
-
-static int do_execute(char **directories, usec_t timeout, char *argv[]) {
-        _cleanup_hashmap_free_free_ Hashmap *pids = NULL;
-        _cleanup_set_free_free_ Set *seen = NULL;
-        char **directory;
-
-        /* We fork this all off from a child process so that we can
-         * somewhat cleanly make use of SIGALRM to set a time limit */
-
-        (void) reset_all_signal_handlers();
-        (void) reset_signal_mask();
-
-        assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
-        pids = hashmap_new(NULL);
-        if (!pids)
-                return log_oom();
-
-        seen = set_new(&string_hash_ops);
-        if (!seen)
-                return log_oom();
-
-        STRV_FOREACH(directory, directories) {
-                _cleanup_closedir_ DIR *d;
-                struct dirent *de;
-
-                d = opendir(*directory);
-                if (!d) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return log_error_errno(errno, "Failed to open directory %s: %m", *directory);
-                }
-
-                FOREACH_DIRENT(de, d, break) {
-                        _cleanup_free_ char *path = NULL;
-                        pid_t pid;
-                        int r;
-
-                        if (!dirent_is_file(de))
-                                continue;
-
-                        if (set_contains(seen, de->d_name)) {
-                                log_debug("%1$s/%2$s skipped (%2$s was already seen).", *directory, de->d_name);
-                                continue;
-                        }
-
-                        r = set_put_strdup(seen, de->d_name);
-                        if (r < 0)
-                                return log_oom();
-
-                        path = strjoin(*directory, "/", de->d_name, NULL);
-                        if (!path)
-                                return log_oom();
-
-                        if (null_or_empty_path(path)) {
-                                log_debug("%s is empty (a mask).", path);
-                                continue;
-                        }
-
-                        pid = fork();
-                        if (pid < 0) {
-                                log_error_errno(errno, "Failed to fork: %m");
-                                continue;
-                        } else if (pid == 0) {
-                                char *_argv[2];
-
-                                assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0);
-
-                                if (!argv) {
-                                        _argv[0] = path;
-                                        _argv[1] = NULL;
-                                        argv = _argv;
-                                } else
-                                        argv[0] = path;
-
-                                execv(path, argv);
-                                return log_error_errno(errno, "Failed to execute %s: %m", path);
-                        }
-
-                        log_debug("Spawned %s as " PID_FMT ".", path, pid);
-
-                        r = hashmap_put(pids, PID_TO_PTR(pid), path);
-                        if (r < 0)
-                                return log_oom();
-                        path = NULL;
-                }
-        }
-
-        /* Abort execution of this process after the timout. We simply
-         * rely on SIGALRM as default action terminating the process,
-         * and turn on alarm(). */
-
-        if (timeout != USEC_INFINITY)
-                alarm((timeout + USEC_PER_SEC - 1) / USEC_PER_SEC);
-
-        while (!hashmap_isempty(pids)) {
-                _cleanup_free_ char *path = NULL;
-                pid_t pid;
-
-                pid = PTR_TO_PID(hashmap_first_key(pids));
-                assert(pid > 0);
-
-                path = hashmap_remove(pids, PID_TO_PTR(pid));
-                assert(path);
-
-                wait_for_terminate_and_warn(path, pid, true);
-        }
-
-        return 0;
-}
-
-void execute_directories(const char* const* directories, usec_t timeout, char *argv[]) {
-        pid_t executor_pid;
-        int r;
-        char *name;
-        char **dirs = (char**) directories;
-
-        assert(!strv_isempty(dirs));
-
-        name = basename(dirs[0]);
-        assert(!isempty(name));
-
-        /* Executes all binaries in the directories in parallel and waits
-         * for them to finish. Optionally a timeout is applied. If a file
-         * with the same name exists in more than one directory, the
-         * earliest one wins. */
-
-        executor_pid = fork();
-        if (executor_pid < 0) {
-                log_error_errno(errno, "Failed to fork: %m");
-                return;
-
-        } else if (executor_pid == 0) {
-                r = do_execute(dirs, timeout, argv);
-                _exit(r < 0 ? EXIT_FAILURE : EXIT_SUCCESS);
-        }
-
-        wait_for_terminate_and_warn(name, executor_pid, true);
-}
-
-bool plymouth_running(void) {
-        return access("/run/plymouth/pid", F_OK) >= 0;
-}
-
-bool display_is_local(const char *display) {
-        assert(display);
-
-        return
-                display[0] == ':' &&
-                display[1] >= '0' &&
-                display[1] <= '9';
-}
-
-int socket_from_display(const char *display, char **path) {
-        size_t k;
-        char *f, *c;
-
-        assert(display);
-        assert(path);
-
-        if (!display_is_local(display))
-                return -EINVAL;
-
-        k = strspn(display+1, "0123456789");
-
-        f = new(char, strlen("/tmp/.X11-unix/X") + k + 1);
-        if (!f)
-                return -ENOMEM;
-
-        c = stpcpy(f, "/tmp/.X11-unix/X");
-        memcpy(c, display+1, k);
-        c[k] = 0;
-
-        *path = f;
-
-        return 0;
-}
-
-int block_get_whole_disk(dev_t d, dev_t *ret) {
-        char *p, *s;
-        int r;
-        unsigned n, m;
-
-        assert(ret);
-
-        /* If it has a queue this is good enough for us */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r >= 0) {
-                *ret = d;
-                return 0;
-        }
-
-        /* If it is a partition find the originating device */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/partition", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r < 0)
-                return -ENOENT;
-
-        /* Get parent dev_t */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/../dev", major(d), minor(d)) < 0)
-                return -ENOMEM;
-
-        r = read_one_line_file(p, &s);
-        free(p);
-
-        if (r < 0)
-                return r;
-
-        r = sscanf(s, "%u:%u", &m, &n);
-        free(s);
-
-        if (r != 2)
-                return -EINVAL;
-
-        /* Only return this if it is really good enough for us. */
-        if (asprintf(&p, "/sys/dev/block/%u:%u/queue", m, n) < 0)
-                return -ENOMEM;
-
-        r = access(p, F_OK);
-        free(p);
-
-        if (r >= 0) {
-                *ret = makedev(m, n);
-                return 0;
-        }
-
-        return -ENOENT;
-}
-
-bool kexec_loaded(void) {
-       bool loaded = false;
-       char *s;
-
-       if (read_one_line_file("/sys/kernel/kexec_loaded", &s) >= 0) {
-               if (s[0] == '1')
-                       loaded = true;
-               free(s);
-       }
-       return loaded;
-}
-
-int prot_from_flags(int flags) {
-
-        switch (flags & O_ACCMODE) {
-
-        case O_RDONLY:
-                return PROT_READ;
-
-        case O_WRONLY:
-                return PROT_WRITE;
-
-        case O_RDWR:
-                return PROT_READ|PROT_WRITE;
-
-        default:
-                return -EINVAL;
-        }
-}
-
-int fork_agent(pid_t *pid, const int except[], unsigned n_except, const char *path, ...) {
-        bool stdout_is_tty, stderr_is_tty;
-        pid_t parent_pid, agent_pid;
-        sigset_t ss, saved_ss;
-        unsigned n, i;
-        va_list ap;
-        char **l;
-
-        assert(pid);
-        assert(path);
-
-        /* Spawns a temporary TTY agent, making sure it goes away when
-         * we go away */
-
-        parent_pid = getpid();
-
-        /* First we temporarily block all signals, so that the new
-         * child has them blocked initially. This way, we can be sure
-         * that SIGTERMs are not lost we might send to the agent. */
-        assert_se(sigfillset(&ss) >= 0);
-        assert_se(sigprocmask(SIG_SETMASK, &ss, &saved_ss) >= 0);
-
-        agent_pid = fork();
-        if (agent_pid < 0) {
-                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
-                return -errno;
-        }
-
-        if (agent_pid != 0) {
-                assert_se(sigprocmask(SIG_SETMASK, &saved_ss, NULL) >= 0);
-                *pid = agent_pid;
-                return 0;
-        }
-
-        /* In the child:
-         *
-         * Make sure the agent goes away when the parent dies */
-        if (prctl(PR_SET_PDEATHSIG, SIGTERM) < 0)
-                _exit(EXIT_FAILURE);
-
-        /* Make sure we actually can kill the agent, if we need to, in
-         * case somebody invoked us from a shell script that trapped
-         * SIGTERM or so... */
-        (void) reset_all_signal_handlers();
-        (void) reset_signal_mask();
-
-        /* Check whether our parent died before we were able
-         * to set the death signal and unblock the signals */
-        if (getppid() != parent_pid)
-                _exit(EXIT_SUCCESS);
-
-        /* Don't leak fds to the agent */
-        close_all_fds(except, n_except);
-
-        stdout_is_tty = isatty(STDOUT_FILENO);
-        stderr_is_tty = isatty(STDERR_FILENO);
-
-        if (!stdout_is_tty || !stderr_is_tty) {
-                int fd;
-
-                /* Detach from stdout/stderr. and reopen
-                 * /dev/tty for them. This is important to
-                 * ensure that when systemctl is started via
-                 * popen() or a similar call that expects to
-                 * read EOF we actually do generate EOF and
-                 * not delay this indefinitely by because we
-                 * keep an unused copy of stdin around. */
-                fd = open("/dev/tty", O_WRONLY);
-                if (fd < 0) {
-                        log_error_errno(errno, "Failed to open /dev/tty: %m");
-                        _exit(EXIT_FAILURE);
-                }
-
-                if (!stdout_is_tty && dup2(fd, STDOUT_FILENO) < 0) {
-                        log_error_errno(errno, "Failed to dup2 /dev/tty: %m");
-                        _exit(EXIT_FAILURE);
-                }
-
-                if (!stderr_is_tty && dup2(fd, STDERR_FILENO) < 0) {
-                        log_error_errno(errno, "Failed to dup2 /dev/tty: %m");
-                        _exit(EXIT_FAILURE);
-                }
-
-                if (fd > STDERR_FILENO)
-                        close(fd);
-        }
-
-        /* Count arguments */
-        va_start(ap, path);
-        for (n = 0; va_arg(ap, char*); n++)
-                ;
-        va_end(ap);
-
-        /* Allocate strv */
-        l = alloca(sizeof(char *) * (n + 1));
-
-        /* Fill in arguments */
-        va_start(ap, path);
-        for (i = 0; i <= n; i++)
-                l[i] = va_arg(ap, char*);
-        va_end(ap);
-
-        execv(path, l);
-        _exit(EXIT_FAILURE);
-}
-
-bool in_initrd(void) {
-        struct statfs s;
-
-        if (saved_in_initrd >= 0)
-                return saved_in_initrd;
-
-        /* We make two checks here:
-         *
-         * 1. the flag file /etc/initrd-release must exist
-         * 2. the root file system must be a memory file system
-         *
-         * The second check is extra paranoia, since misdetecting an
-         * initrd can have bad consequences due the initrd
-         * emptying when transititioning to the main systemd.
-         */
-
-        saved_in_initrd = access("/etc/initrd-release", F_OK) >= 0 &&
-                          statfs("/", &s) >= 0 &&
-                          is_temporary_fs(&s);
-
-        return saved_in_initrd;
-}
-
-void in_initrd_force(bool value) {
-        saved_in_initrd = value;
-}
-
-/* hey glibc, APIs with callbacks without a user pointer are so useless */
-void *xbsearch_r(const void *key, const void *base, size_t nmemb, size_t size,
-                 int (*compar) (const void *, const void *, void *), void *arg) {
-        size_t l, u, idx;
-        const void *p;
-        int comparison;
-
-        l = 0;
-        u = nmemb;
-        while (l < u) {
-                idx = (l + u) / 2;
-                p = (void *)(((const char *) base) + (idx * size));
-                comparison = compar(key, p, arg);
-                if (comparison < 0)
-                        u = idx;
-                else if (comparison > 0)
-                        l = idx + 1;
-                else
-                        return (void *)p;
-        }
-        return NULL;
-}
-
-int on_ac_power(void) {
-        bool found_offline = false, found_online = false;
-        _cleanup_closedir_ DIR *d = NULL;
-
-        d = opendir("/sys/class/power_supply");
-        if (!d)
-                return errno == ENOENT ? true : -errno;
-
-        for (;;) {
-                struct dirent *de;
-                _cleanup_close_ int fd = -1, device = -1;
-                char contents[6];
-                ssize_t n;
-
-                errno = 0;
-                de = readdir(d);
-                if (!de && errno > 0)
-                        return -errno;
-
-                if (!de)
-                        break;
-
-                if (hidden_or_backup_file(de->d_name))
-                        continue;
-
-                device = openat(dirfd(d), de->d_name, O_DIRECTORY|O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (device < 0) {
-                        if (errno == ENOENT || errno == ENOTDIR)
-                                continue;
-
-                        return -errno;
-                }
-
-                fd = openat(device, "type", O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (fd < 0) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                n = read(fd, contents, sizeof(contents));
-                if (n < 0)
-                        return -errno;
-
-                if (n != 6 || memcmp(contents, "Mains\n", 6))
-                        continue;
-
-                safe_close(fd);
-                fd = openat(device, "online", O_RDONLY|O_CLOEXEC|O_NOCTTY);
-                if (fd < 0) {
-                        if (errno == ENOENT)
-                                continue;
-
-                        return -errno;
-                }
-
-                n = read(fd, contents, sizeof(contents));
-                if (n < 0)
-                        return -errno;
-
-                if (n != 2 || contents[1] != '\n')
-                        return -EIO;
-
-                if (contents[0] == '1') {
-                        found_online = true;
-                        break;
-                } else if (contents[0] == '0')
-                        found_offline = true;
-                else
-                        return -EIO;
-        }
-
-        return found_online || !found_offline;
-}
-
-int container_get_leader(const char *machine, pid_t *pid) {
-        _cleanup_free_ char *s = NULL, *class = NULL;
-        const char *p;
-        pid_t leader;
-        int r;
-
-        assert(machine);
-        assert(pid);
-
-        if (!machine_name_is_valid(machine))
-                return -EINVAL;
-
-        p = strjoina("/run/systemd/machines/", machine);
-        r = parse_env_file(p, NEWLINE, "LEADER", &s, "CLASS", &class, NULL);
-        if (r == -ENOENT)
-                return -EHOSTDOWN;
-        if (r < 0)
-                return r;
-        if (!s)
-                return -EIO;
-
-        if (!streq_ptr(class, "container"))
-                return -EIO;
-
-        r = parse_pid(s, &leader);
-        if (r < 0)
-                return r;
-        if (leader <= 1)
-                return -EIO;
-
-        *pid = leader;
-        return 0;
-}
-
-int namespace_open(pid_t pid, int *pidns_fd, int *mntns_fd, int *netns_fd, int *userns_fd, int *root_fd) {
-        _cleanup_close_ int pidnsfd = -1, mntnsfd = -1, netnsfd = -1, usernsfd = -1;
-        int rfd = -1;
-
-        assert(pid >= 0);
-
-        if (mntns_fd) {
-                const char *mntns;
-
-                mntns = procfs_file_alloca(pid, "ns/mnt");
-                mntnsfd = open(mntns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (mntnsfd < 0)
-                        return -errno;
-        }
-
-        if (pidns_fd) {
-                const char *pidns;
-
-                pidns = procfs_file_alloca(pid, "ns/pid");
-                pidnsfd = open(pidns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (pidnsfd < 0)
-                        return -errno;
-        }
-
-        if (netns_fd) {
-                const char *netns;
-
-                netns = procfs_file_alloca(pid, "ns/net");
-                netnsfd = open(netns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (netnsfd < 0)
-                        return -errno;
-        }
-
-        if (userns_fd) {
-                const char *userns;
-
-                userns = procfs_file_alloca(pid, "ns/user");
-                usernsfd = open(userns, O_RDONLY|O_NOCTTY|O_CLOEXEC);
-                if (usernsfd < 0 && errno != ENOENT)
-                        return -errno;
-        }
-
-        if (root_fd) {
-                const char *root;
-
-                root = procfs_file_alloca(pid, "root");
-                rfd = open(root, O_RDONLY|O_NOCTTY|O_CLOEXEC|O_DIRECTORY);
-                if (rfd < 0)
-                        return -errno;
-        }
-
-        if (pidns_fd)
-                *pidns_fd = pidnsfd;
-
-        if (mntns_fd)
-                *mntns_fd = mntnsfd;
-
-        if (netns_fd)
-                *netns_fd = netnsfd;
-
-        if (userns_fd)
-                *userns_fd = usernsfd;
-
-        if (root_fd)
-                *root_fd = rfd;
-
-        pidnsfd = mntnsfd = netnsfd = usernsfd = -1;
-
-        return 0;
-}
-
-int namespace_enter(int pidns_fd, int mntns_fd, int netns_fd, int userns_fd, int root_fd) {
-        if (userns_fd >= 0) {
-                /* Can't setns to your own userns, since then you could
-                 * escalate from non-root to root in your own namespace, so
-                 * check if namespaces equal before attempting to enter. */
-                _cleanup_free_ char *userns_fd_path = NULL;
-                int r;
-                if (asprintf(&userns_fd_path, "/proc/self/fd/%d", userns_fd) < 0)
-                        return -ENOMEM;
-
-                r = files_same(userns_fd_path, "/proc/self/ns/user");
-                if (r < 0)
-                        return r;
-                if (r)
-                        userns_fd = -1;
-        }
-
-        if (pidns_fd >= 0)
-                if (setns(pidns_fd, CLONE_NEWPID) < 0)
-                        return -errno;
-
-        if (mntns_fd >= 0)
-                if (setns(mntns_fd, CLONE_NEWNS) < 0)
-                        return -errno;
-
-        if (netns_fd >= 0)
-                if (setns(netns_fd, CLONE_NEWNET) < 0)
-                        return -errno;
-
-        if (userns_fd >= 0)
-                if (setns(userns_fd, CLONE_NEWUSER) < 0)
-                        return -errno;
-
-        if (root_fd >= 0) {
-                if (fchdir(root_fd) < 0)
-                        return -errno;
-
-                if (chroot(".") < 0)
-                        return -errno;
-        }
-
-        return reset_uid_gid();
-}
-
-uint64_t physical_memory(void) {
-        _cleanup_free_ char *root = NULL, *value = NULL;
-        uint64_t mem, lim;
-        size_t ps;
-        long sc;
-
-        /* We return this as uint64_t in case we are running as 32bit process on a 64bit kernel with huge amounts of
-         * memory.
-         *
-         * In order to support containers nicely that have a configured memory limit we'll take the minimum of the
-         * physically reported amount of memory and the limit configured for the root cgroup, if there is any. */
-
-        sc = sysconf(_SC_PHYS_PAGES);
-        assert(sc > 0);
-
-        ps = page_size();
-        mem = (uint64_t) sc * (uint64_t) ps;
-
-        if (cg_get_root_path(&root) < 0)
-                return mem;
-
-        if (cg_get_attribute("memory", root, "memory.limit_in_bytes", &value))
-                return mem;
-
-        if (safe_atou64(value, &lim) < 0)
-                return mem;
-
-        /* Make sure the limit is a multiple of our own page size */
-        lim /= ps;
-        lim *= ps;
-
-        return MIN(mem, lim);
-}
-
-uint64_t physical_memory_scale(uint64_t v, uint64_t max) {
-        uint64_t p, m, ps, r;
-
-        assert(max > 0);
-
-        /* Returns the physical memory size, multiplied by v divided by max. Returns UINT64_MAX on overflow. On success
-         * the result is a multiple of the page size (rounds down). */
-
-        ps = page_size();
-        assert(ps > 0);
-
-        p = physical_memory() / ps;
-        assert(p > 0);
-
-        m = p * v;
-        if (m / p != v)
-                return UINT64_MAX;
-
-        m /= max;
-
-        r = m * ps;
-        if (r / ps != m)
-                return UINT64_MAX;
-
-        return r;
-}
-
-uint64_t system_tasks_max(void) {
-
-#if SIZEOF_PID_T == 4
-#define TASKS_MAX ((uint64_t) (INT32_MAX-1))
-#elif SIZEOF_PID_T == 2
-#define TASKS_MAX ((uint64_t) (INT16_MAX-1))
-#else
-#error "Unknown pid_t size"
-#endif
-
-        _cleanup_free_ char *value = NULL, *root = NULL;
-        uint64_t a = TASKS_MAX, b = TASKS_MAX;
-
-        /* Determine the maximum number of tasks that may run on this system. We check three sources to determine this
-         * limit:
-         *
-         * a) the maximum value for the pid_t type
-         * b) the cgroups pids_max attribute for the system
-         * c) the kernel's configure maximum PID value
-         *
-         * And then pick the smallest of the three */
-
-        if (read_one_line_file("/proc/sys/kernel/pid_max", &value) >= 0)
-                (void) safe_atou64(value, &a);
-
-        if (cg_get_root_path(&root) >= 0) {
-                value = mfree(value);
-
-                if (cg_get_attribute("pids", root, "pids.max", &value) >= 0)
-                        (void) safe_atou64(value, &b);
-        }
-
-        return MIN3(TASKS_MAX,
-                    a <= 0 ? TASKS_MAX : a,
-                    b <= 0 ? TASKS_MAX : b);
-}
-
-uint64_t system_tasks_max_scale(uint64_t v, uint64_t max) {
-        uint64_t t, m;
-
-        assert(max > 0);
-
-        /* Multiply the system's task value by the fraction v/max. Hence, if max==100 this calculates percentages
-         * relative to the system's maximum number of tasks. Returns UINT64_MAX on overflow. */
-
-        t = system_tasks_max();
-        assert(t > 0);
-
-        m = t * v;
-        if (m / t != v) /* overflow? */
-                return UINT64_MAX;
-
-        return m / max;
-}
-
-int update_reboot_parameter_and_warn(const char *param) {
-        int r;
-
-        if (isempty(param)) {
-                if (unlink("/run/systemd/reboot-param") < 0) {
-                        if (errno == ENOENT)
-                                return 0;
-
-                        return log_warning_errno(errno, "Failed to unlink reboot parameter file: %m");
-                }
-
-                return 0;
-        }
-
-        RUN_WITH_UMASK(0022) {
-                r = write_string_file("/run/systemd/reboot-param", param, WRITE_STRING_FILE_CREATE);
-                if (r < 0)
-                        return log_warning_errno(r, "Failed to write reboot parameter file: %m");
-        }
-
-        return 0;
-}
-
-int version(void) {
-        puts(PACKAGE_STRING "\n"
-             SYSTEMD_FEATURES);
-        return 0;
-}