build-sys: split internal basic/ library from shared/

basic/      can be used by everything
            cannot use anything outside of basic/

libsystemd/ can use basic/
            cannot use shared/

shared/     can use libsystemd/

1 files changed, 0 insertions, 1917 deletions

diff --git a/src/shared/cgroup-util.c b/src/shared/cgroup-util.c
deleted file mode 100644
index d83cdf7e5f..0000000000
--- a/src/shared/cgroup-util.c
+++ /dev/null
@@ -1,1917 +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 <errno.h>
-#include <unistd.h>
-#include <signal.h>
-#include <string.h>
-#include <stdlib.h>
-#include <dirent.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <ftw.h>
-
-#include "cgroup-util.h"
-#include "set.h"
-#include "macro.h"
-#include "util.h"
-#include "formats-util.h"
-#include "process-util.h"
-#include "path-util.h"
-#include "unit-name.h"
-#include "fileio.h"
-#include "special.h"
-#include "mkdir.h"
-#include "login-shared.h"
-
-int cg_enumerate_processes(const char *controller, const char *path, FILE **_f) {
-        _cleanup_free_ char *fs = NULL;
-        FILE *f;
-        int r;
-
-        assert(_f);
-
-        r = cg_get_path(controller, path, "cgroup.procs", &fs);
-        if (r < 0)
-                return r;
-
-        f = fopen(fs, "re");
-        if (!f)
-                return -errno;
-
-        *_f = f;
-        return 0;
-}
-
-int cg_read_pid(FILE *f, pid_t *_pid) {
-        unsigned long ul;
-
-        /* Note that the cgroup.procs might contain duplicates! See
-         * cgroups.txt for details. */
-
-        assert(f);
-        assert(_pid);
-
-        errno = 0;
-        if (fscanf(f, "%lu", &ul) != 1) {
-
-                if (feof(f))
-                        return 0;
-
-                return errno ? -errno : -EIO;
-        }
-
-        if (ul <= 0)
-                return -EIO;
-
-        *_pid = (pid_t) ul;
-        return 1;
-}
-
-int cg_enumerate_subgroups(const char *controller, const char *path, DIR **_d) {
-        _cleanup_free_ char *fs = NULL;
-        int r;
-        DIR *d;
-
-        assert(_d);
-
-        /* This is not recursive! */
-
-        r = cg_get_path(controller, path, NULL, &fs);
-        if (r < 0)
-                return r;
-
-        d = opendir(fs);
-        if (!d)
-                return -errno;
-
-        *_d = d;
-        return 0;
-}
-
-int cg_read_subgroup(DIR *d, char **fn) {
-        struct dirent *de;
-
-        assert(d);
-        assert(fn);
-
-        FOREACH_DIRENT(de, d, return -errno) {
-                char *b;
-
-                if (de->d_type != DT_DIR)
-                        continue;
-
-                if (streq(de->d_name, ".") ||
-                    streq(de->d_name, ".."))
-                        continue;
-
-                b = strdup(de->d_name);
-                if (!b)
-                        return -ENOMEM;
-
-                *fn = b;
-                return 1;
-        }
-
-        return 0;
-}
-
-int cg_rmdir(const char *controller, const char *path) {
-        _cleanup_free_ char *p = NULL;
-        int r;
-
-        r = cg_get_path(controller, path, NULL, &p);
-        if (r < 0)
-                return r;
-
-        r = rmdir(p);
-        if (r < 0 && errno != ENOENT)
-                return -errno;
-
-        return 0;
-}
-
-int cg_kill(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, Set *s) {
-        _cleanup_set_free_ Set *allocated_set = NULL;
-        bool done = false;
-        int r, ret = 0;
-        pid_t my_pid;
-
-        assert(sig >= 0);
-
-        /* This goes through the tasks list and kills them all. This
-         * is repeated until no further processes are added to the
-         * tasks list, to properly handle forking processes */
-
-        if (!s) {
-                s = allocated_set = set_new(NULL);
-                if (!s)
-                        return -ENOMEM;
-        }
-
-        my_pid = getpid();
-
-        do {
-                _cleanup_fclose_ FILE *f = NULL;
-                pid_t pid = 0;
-                done = true;
-
-                r = cg_enumerate_processes(controller, path, &f);
-                if (r < 0) {
-                        if (ret >= 0 && r != -ENOENT)
-                                return r;
-
-                        return ret;
-                }
-
-                while ((r = cg_read_pid(f, &pid)) > 0) {
-
-                        if (ignore_self && pid == my_pid)
-                                continue;
-
-                        if (set_get(s, LONG_TO_PTR(pid)) == LONG_TO_PTR(pid))
-                                continue;
-
-                        /* If we haven't killed this process yet, kill
-                         * it */
-                        if (kill(pid, sig) < 0) {
-                                if (ret >= 0 && errno != ESRCH)
-                                        ret = -errno;
-                        } else {
-                                if (sigcont && sig != SIGKILL)
-                                        kill(pid, SIGCONT);
-
-                                if (ret == 0)
-                                        ret = 1;
-                        }
-
-                        done = false;
-
-                        r = set_put(s, LONG_TO_PTR(pid));
-                        if (r < 0) {
-                                if (ret >= 0)
-                                        return r;
-
-                                return ret;
-                        }
-                }
-
-                if (r < 0) {
-                        if (ret >= 0)
-                                return r;
-
-                        return ret;
-                }
-
-                /* To avoid racing against processes which fork
-                 * quicker than we can kill them we repeat this until
-                 * no new pids need to be killed. */
-
-        } while (!done);
-
-        return ret;
-}
-
-int cg_kill_recursive(const char *controller, const char *path, int sig, bool sigcont, bool ignore_self, bool rem, Set *s) {
-        _cleanup_set_free_ Set *allocated_set = NULL;
-        _cleanup_closedir_ DIR *d = NULL;
-        int r, ret = 0;
-        char *fn;
-
-        assert(path);
-        assert(sig >= 0);
-
-        if (!s) {
-                s = allocated_set = set_new(NULL);
-                if (!s)
-                        return -ENOMEM;
-        }
-
-        ret = cg_kill(controller, path, sig, sigcont, ignore_self, s);
-
-        r = cg_enumerate_subgroups(controller, path, &d);
-        if (r < 0) {
-                if (ret >= 0 && r != -ENOENT)
-                        return r;
-
-                return ret;
-        }
-
-        while ((r = cg_read_subgroup(d, &fn)) > 0) {
-                _cleanup_free_ char *p = NULL;
-
-                p = strjoin(path, "/", fn, NULL);
-                free(fn);
-                if (!p)
-                        return -ENOMEM;
-
-                r = cg_kill_recursive(controller, p, sig, sigcont, ignore_self, rem, s);
-                if (ret >= 0 && r != 0)
-                        ret = r;
-        }
-
-        if (ret >= 0 && r < 0)
-                ret = r;
-
-        if (rem) {
-                r = cg_rmdir(controller, path);
-                if (r < 0 && ret >= 0 && r != -ENOENT && r != -EBUSY)
-                        return r;
-        }
-
-        return ret;
-}
-
-int cg_migrate(const char *cfrom, const char *pfrom, const char *cto, const char *pto, bool ignore_self) {
-        bool done = false;
-        _cleanup_set_free_ Set *s = NULL;
-        int r, ret = 0;
-        pid_t my_pid;
-
-        assert(cfrom);
-        assert(pfrom);
-        assert(cto);
-        assert(pto);
-
-        s = set_new(NULL);
-        if (!s)
-                return -ENOMEM;
-
-        my_pid = getpid();
-
-        do {
-                _cleanup_fclose_ FILE *f = NULL;
-                pid_t pid = 0;
-                done = true;
-
-                r = cg_enumerate_processes(cfrom, pfrom, &f);
-                if (r < 0) {
-                        if (ret >= 0 && r != -ENOENT)
-                                return r;
-
-                        return ret;
-                }
-
-                while ((r = cg_read_pid(f, &pid)) > 0) {
-
-                        /* This might do weird stuff if we aren't a
-                         * single-threaded program. However, we
-                         * luckily know we are not */
-                        if (ignore_self && pid == my_pid)
-                                continue;
-
-                        if (set_get(s, LONG_TO_PTR(pid)) == LONG_TO_PTR(pid))
-                                continue;
-
-                        r = cg_attach(cto, pto, pid);
-                        if (r < 0) {
-                                if (ret >= 0 && r != -ESRCH)
-                                        ret = r;
-                        } else if (ret == 0)
-                                ret = 1;
-
-                        done = false;
-
-                        r = set_put(s, LONG_TO_PTR(pid));
-                        if (r < 0) {
-                                if (ret >= 0)
-                                        return r;
-
-                                return ret;
-                        }
-                }
-
-                if (r < 0) {
-                        if (ret >= 0)
-                                return r;
-
-                        return ret;
-                }
-        } while (!done);
-
-        return ret;
-}
-
-int cg_migrate_recursive(
-                const char *cfrom,
-                const char *pfrom,
-                const char *cto,
-                const char *pto,
-                bool ignore_self,
-                bool rem) {
-
-        _cleanup_closedir_ DIR *d = NULL;
-        int r, ret = 0;
-        char *fn;
-
-        assert(cfrom);
-        assert(pfrom);
-        assert(cto);
-        assert(pto);
-
-        ret = cg_migrate(cfrom, pfrom, cto, pto, ignore_self);
-
-        r = cg_enumerate_subgroups(cfrom, pfrom, &d);
-        if (r < 0) {
-                if (ret >= 0 && r != -ENOENT)
-                        return r;
-
-                return ret;
-        }
-
-        while ((r = cg_read_subgroup(d, &fn)) > 0) {
-                _cleanup_free_ char *p = NULL;
-
-                p = strjoin(pfrom, "/", fn, NULL);
-                free(fn);
-                if (!p) {
-                        if (ret >= 0)
-                                return -ENOMEM;
-
-                        return ret;
-                }
-
-                r = cg_migrate_recursive(cfrom, p, cto, pto, ignore_self, rem);
-                if (r != 0 && ret >= 0)
-                        ret = r;
-        }
-
-        if (r < 0 && ret >= 0)
-                ret = r;
-
-        if (rem) {
-                r = cg_rmdir(cfrom, pfrom);
-                if (r < 0 && ret >= 0 && r != -ENOENT && r != -EBUSY)
-                        return r;
-        }
-
-        return ret;
-}
-
-int cg_migrate_recursive_fallback(
-                const char *cfrom,
-                const char *pfrom,
-                const char *cto,
-                const char *pto,
-                bool ignore_self,
-                bool rem) {
-
-        int r;
-
-        assert(cfrom);
-        assert(pfrom);
-        assert(cto);
-        assert(pto);
-
-        r = cg_migrate_recursive(cfrom, pfrom, cto, pto, ignore_self, rem);
-        if (r < 0) {
-                char prefix[strlen(pto) + 1];
-
-                /* This didn't work? Then let's try all prefixes of the destination */
-
-                PATH_FOREACH_PREFIX(prefix, pto) {
-                        r = cg_migrate_recursive(cfrom, pfrom, cto, prefix, ignore_self, rem);
-                        if (r >= 0)
-                                break;
-                }
-        }
-
-        return 0;
-}
-
-static const char *normalize_controller(const char *controller) {
-
-        assert(controller);
-
-        if (startswith(controller, "name="))
-                return controller + 5;
-        else
-                return controller;
-}
-
-static int join_path(const char *controller, const char *path, const char *suffix, char **fs) {
-        char *t = NULL;
-
-        if (!isempty(controller)) {
-                if (!isempty(path) && !isempty(suffix))
-                        t = strjoin("/sys/fs/cgroup/", controller, "/", path, "/", suffix, NULL);
-                else if (!isempty(path))
-                        t = strjoin("/sys/fs/cgroup/", controller, "/", path, NULL);
-                else if (!isempty(suffix))
-                        t = strjoin("/sys/fs/cgroup/", controller, "/", suffix, NULL);
-                else
-                        t = strappend("/sys/fs/cgroup/", controller);
-        } else {
-                if (!isempty(path) && !isempty(suffix))
-                        t = strjoin(path, "/", suffix, NULL);
-                else if (!isempty(path))
-                        t = strdup(path);
-                else
-                        return -EINVAL;
-        }
-
-        if (!t)
-                return -ENOMEM;
-
-        *fs = path_kill_slashes(t);
-        return 0;
-}
-
-int cg_get_path(const char *controller, const char *path, const char *suffix, char **fs) {
-        const char *p;
-        static thread_local bool good = false;
-
-        assert(fs);
-
-        if (controller && !cg_controller_is_valid(controller))
-                return -EINVAL;
-
-        if (_unlikely_(!good)) {
-                int r;
-
-                r = path_is_mount_point("/sys/fs/cgroup", 0);
-                if (r < 0)
-                        return r;
-                if (r == 0)
-                        return -ENOENT;
-
-                /* Cache this to save a few stat()s */
-                good = true;
-        }
-
-        p = controller ? normalize_controller(controller) : NULL;
-
-        return join_path(p, path, suffix, fs);
-}
-
-static int check_hierarchy(const char *p) {
-        const char *cc;
-
-        assert(p);
-
-        if (!filename_is_valid(p))
-                return 0;
-
-        /* Check if this controller actually really exists */
-        cc = strjoina("/sys/fs/cgroup/", p);
-        if (laccess(cc, F_OK) < 0)
-                return -errno;
-
-        return 0;
-}
-
-int cg_get_path_and_check(const char *controller, const char *path, const char *suffix, char **fs) {
-        const char *p;
-        int r;
-
-        assert(fs);
-
-        if (!cg_controller_is_valid(controller))
-                return -EINVAL;
-
-        /* Normalize the controller syntax */
-        p = normalize_controller(controller);
-
-        /* Check if this controller actually really exists */
-        r = check_hierarchy(p);
-        if (r < 0)
-                return r;
-
-        return join_path(p, path, suffix, fs);
-}
-
-static int trim_cb(const char *path, const struct stat *sb, int typeflag, struct FTW *ftwbuf) {
-        assert(path);
-        assert(sb);
-        assert(ftwbuf);
-
-        if (typeflag != FTW_DP)
-                return 0;
-
-        if (ftwbuf->level < 1)
-                return 0;
-
-        rmdir(path);
-        return 0;
-}
-
-int cg_trim(const char *controller, const char *path, bool delete_root) {
-        _cleanup_free_ char *fs = NULL;
-        int r = 0;
-
-        assert(path);
-
-        r = cg_get_path(controller, path, NULL, &fs);
-        if (r < 0)
-                return r;
-
-        errno = 0;
-        if (nftw(fs, trim_cb, 64, FTW_DEPTH|FTW_MOUNT|FTW_PHYS) != 0)
-                r = errno ? -errno : -EIO;
-
-        if (delete_root) {
-                if (rmdir(fs) < 0 && errno != ENOENT)
-                        return -errno;
-        }
-
-        return r;
-}
-
-int cg_delete(const char *controller, const char *path) {
-        _cleanup_free_ char *parent = NULL;
-        int r;
-
-        assert(path);
-
-        r = path_get_parent(path, &parent);
-        if (r < 0)
-                return r;
-
-        r = cg_migrate_recursive(controller, path, controller, parent, false, true);
-        return r == -ENOENT ? 0 : r;
-}
-
-int cg_create(const char *controller, const char *path) {
-        _cleanup_free_ char *fs = NULL;
-        int r;
-
-        r = cg_get_path_and_check(controller, path, NULL, &fs);
-        if (r < 0)
-                return r;
-
-        r = mkdir_parents(fs, 0755);
-        if (r < 0)
-                return r;
-
-        if (mkdir(fs, 0755) < 0) {
-
-                if (errno == EEXIST)
-                        return 0;
-
-                return -errno;
-        }
-
-        return 1;
-}
-
-int cg_create_and_attach(const char *controller, const char *path, pid_t pid) {
-        int r, q;
-
-        assert(pid >= 0);
-
-        r = cg_create(controller, path);
-        if (r < 0)
-                return r;
-
-        q = cg_attach(controller, path, pid);
-        if (q < 0)
-                return q;
-
-        /* This does not remove the cgroup on failure */
-        return r;
-}
-
-int cg_attach(const char *controller, const char *path, pid_t pid) {
-        _cleanup_free_ char *fs = NULL;
-        char c[DECIMAL_STR_MAX(pid_t) + 2];
-        int r;
-
-        assert(path);
-        assert(pid >= 0);
-
-        r = cg_get_path_and_check(controller, path, "cgroup.procs", &fs);
-        if (r < 0)
-                return r;
-
-        if (pid == 0)
-                pid = getpid();
-
-        snprintf(c, sizeof(c), PID_FMT"\n", pid);
-
-        return write_string_file_no_create(fs, c);
-}
-
-int cg_attach_fallback(const char *controller, const char *path, pid_t pid) {
-        int r;
-
-        assert(controller);
-        assert(path);
-        assert(pid >= 0);
-
-        r = cg_attach(controller, path, pid);
-        if (r < 0) {
-                char prefix[strlen(path) + 1];
-
-                /* This didn't work? Then let's try all prefixes of
-                 * the destination */
-
-                PATH_FOREACH_PREFIX(prefix, path) {
-                        r = cg_attach(controller, prefix, pid);
-                        if (r >= 0)
-                                break;
-                }
-        }
-
-        return 0;
-}
-
-int cg_set_group_access(
-                const char *controller,
-                const char *path,
-                mode_t mode,
-                uid_t uid,
-                gid_t gid) {
-
-        _cleanup_free_ char *fs = NULL;
-        int r;
-
-        assert(path);
-
-        if (mode != MODE_INVALID)
-                mode &= 0777;
-
-        r = cg_get_path(controller, path, NULL, &fs);
-        if (r < 0)
-                return r;
-
-        return chmod_and_chown(fs, mode, uid, gid);
-}
-
-int cg_set_task_access(
-                const char *controller,
-                const char *path,
-                mode_t mode,
-                uid_t uid,
-                gid_t gid) {
-
-        _cleanup_free_ char *fs = NULL, *procs = NULL;
-        int r;
-
-        assert(path);
-
-        if (mode == MODE_INVALID && uid == UID_INVALID && gid == GID_INVALID)
-                return 0;
-
-        if (mode != MODE_INVALID)
-                mode &= 0666;
-
-        r = cg_get_path(controller, path, "cgroup.procs", &fs);
-        if (r < 0)
-                return r;
-
-        r = chmod_and_chown(fs, mode, uid, gid);
-        if (r < 0)
-                return r;
-
-        /* Compatibility, Always keep values for "tasks" in sync with
-         * "cgroup.procs" */
-        r = cg_get_path(controller, path, "tasks", &procs);
-        if (r < 0)
-                return r;
-
-        return chmod_and_chown(procs, mode, uid, gid);
-}
-
-int cg_pid_get_path(const char *controller, pid_t pid, char **path) {
-        _cleanup_fclose_ FILE *f = NULL;
-        char line[LINE_MAX];
-        const char *fs;
-        size_t cs;
-
-        assert(path);
-        assert(pid >= 0);
-
-        if (controller) {
-                if (!cg_controller_is_valid(controller))
-                        return -EINVAL;
-
-                controller = normalize_controller(controller);
-        } else
-                controller = SYSTEMD_CGROUP_CONTROLLER;
-
-        fs = procfs_file_alloca(pid, "cgroup");
-
-        f = fopen(fs, "re");
-        if (!f)
-                return errno == ENOENT ? -ESRCH : -errno;
-
-        cs = strlen(controller);
-
-        FOREACH_LINE(line, f, return -errno) {
-                char *l, *p, *e;
-                size_t k;
-                const char *word, *state;
-                bool found = false;
-
-                truncate_nl(line);
-
-                l = strchr(line, ':');
-                if (!l)
-                        continue;
-
-                l++;
-                e = strchr(l, ':');
-                if (!e)
-                        continue;
-
-                *e = 0;
-
-                FOREACH_WORD_SEPARATOR(word, k, l, ",", state) {
-
-                        if (k == cs && memcmp(word, controller, cs) == 0) {
-                                found = true;
-                                break;
-                        }
-
-                        if (k == 5 + cs &&
-                            memcmp(word, "name=", 5) == 0 &&
-                            memcmp(word+5, controller, cs) == 0) {
-                                found = true;
-                                break;
-                        }
-                }
-
-                if (!found)
-                        continue;
-
-                p = strdup(e + 1);
-                if (!p)
-                        return -ENOMEM;
-
-                *path = p;
-                return 0;
-        }
-
-        return -ENOENT;
-}
-
-int cg_install_release_agent(const char *controller, const char *agent) {
-        _cleanup_free_ char *fs = NULL, *contents = NULL;
-        char *sc;
-        int r;
-
-        assert(agent);
-
-        r = cg_get_path(controller, NULL, "release_agent", &fs);
-        if (r < 0)
-                return r;
-
-        r = read_one_line_file(fs, &contents);
-        if (r < 0)
-                return r;
-
-        sc = strstrip(contents);
-        if (sc[0] == 0) {
-                r = write_string_file_no_create(fs, agent);
-                if (r < 0)
-                        return r;
-        } else if (!streq(sc, agent))
-                return -EEXIST;
-
-        free(fs);
-        fs = NULL;
-        r = cg_get_path(controller, NULL, "notify_on_release", &fs);
-        if (r < 0)
-                return r;
-
-        free(contents);
-        contents = NULL;
-        r = read_one_line_file(fs, &contents);
-        if (r < 0)
-                return r;
-
-        sc = strstrip(contents);
-        if (streq(sc, "0")) {
-                r = write_string_file_no_create(fs, "1");
-                if (r < 0)
-                        return r;
-
-                return 1;
-        }
-
-        if (!streq(sc, "1"))
-                return -EIO;
-
-        return 0;
-}
-
-int cg_uninstall_release_agent(const char *controller) {
-        _cleanup_free_ char *fs = NULL;
-        int r;
-
-        r = cg_get_path(controller, NULL, "notify_on_release", &fs);
-        if (r < 0)
-                return r;
-
-        r = write_string_file_no_create(fs, "0");
-        if (r < 0)
-                return r;
-
-        free(fs);
-        fs = NULL;
-
-        r = cg_get_path(controller, NULL, "release_agent", &fs);
-        if (r < 0)
-                return r;
-
-        r = write_string_file_no_create(fs, "");
-        if (r < 0)
-                return r;
-
-        return 0;
-}
-
-int cg_is_empty(const char *controller, const char *path, bool ignore_self) {
-        _cleanup_fclose_ FILE *f = NULL;
-        pid_t pid = 0, self_pid;
-        bool found = false;
-        int r;
-
-        assert(path);
-
-        r = cg_enumerate_processes(controller, path, &f);
-        if (r < 0)
-                return r == -ENOENT ? 1 : r;
-
-        self_pid = getpid();
-
-        while ((r = cg_read_pid(f, &pid)) > 0) {
-
-                if (ignore_self && pid == self_pid)
-                        continue;
-
-                found = true;
-                break;
-        }
-
-        if (r < 0)
-                return r;
-
-        return !found;
-}
-
-int cg_is_empty_recursive(const char *controller, const char *path, bool ignore_self) {
-        _cleanup_closedir_ DIR *d = NULL;
-        char *fn;
-        int r;
-
-        assert(path);
-
-        r = cg_is_empty(controller, path, ignore_self);
-        if (r <= 0)
-                return r;
-
-        r = cg_enumerate_subgroups(controller, path, &d);
-        if (r < 0)
-                return r == -ENOENT ? 1 : r;
-
-        while ((r = cg_read_subgroup(d, &fn)) > 0) {
-                _cleanup_free_ char *p = NULL;
-
-                p = strjoin(path, "/", fn, NULL);
-                free(fn);
-                if (!p)
-                        return -ENOMEM;
-
-                r = cg_is_empty_recursive(controller, p, ignore_self);
-                if (r <= 0)
-                        return r;
-        }
-
-        if (r < 0)
-                return r;
-
-        return 1;
-}
-
-int cg_split_spec(const char *spec, char **controller, char **path) {
-        const char *e;
-        char *t = NULL, *u = NULL;
-        _cleanup_free_ char *v = NULL;
-
-        assert(spec);
-
-        if (*spec == '/') {
-                if (!path_is_safe(spec))
-                        return -EINVAL;
-
-                if (path) {
-                        t = strdup(spec);
-                        if (!t)
-                                return -ENOMEM;
-
-                        *path = path_kill_slashes(t);
-                }
-
-                if (controller)
-                        *controller = NULL;
-
-                return 0;
-        }
-
-        e = strchr(spec, ':');
-        if (!e) {
-                if (!cg_controller_is_valid(spec))
-                        return -EINVAL;
-
-                if (controller) {
-                        t = strdup(normalize_controller(spec));
-                        if (!t)
-                                return -ENOMEM;
-
-                        *controller = t;
-                }
-
-                if (path)
-                        *path = NULL;
-
-                return 0;
-        }
-
-        v = strndup(spec, e-spec);
-        if (!v)
-                return -ENOMEM;
-        t = strdup(normalize_controller(v));
-        if (!t)
-                return -ENOMEM;
-        if (!cg_controller_is_valid(t)) {
-                free(t);
-                return -EINVAL;
-        }
-
-        if (streq(e+1, "")) {
-                u = strdup("/");
-                if (!u) {
-                        free(t);
-                        return -ENOMEM;
-                }
-        } else {
-                u = strdup(e+1);
-                if (!u) {
-                        free(t);
-                        return -ENOMEM;
-                }
-
-                if (!path_is_safe(u) ||
-                    !path_is_absolute(u)) {
-                        free(t);
-                        free(u);
-                        return -EINVAL;
-                }
-
-                path_kill_slashes(u);
-        }
-
-        if (controller)
-                *controller = t;
-        else
-                free(t);
-
-        if (path)
-                *path = u;
-        else
-                free(u);
-
-        return 0;
-}
-
-int cg_mangle_path(const char *path, char **result) {
-        _cleanup_free_ char *c = NULL, *p = NULL;
-        char *t;
-        int r;
-
-        assert(path);
-        assert(result);
-
-        /* First, check if it already is a filesystem path */
-        if (path_startswith(path, "/sys/fs/cgroup")) {
-
-                t = strdup(path);
-                if (!t)
-                        return -ENOMEM;
-
-                *result = path_kill_slashes(t);
-                return 0;
-        }
-
-        /* Otherwise, treat it as cg spec */
-        r = cg_split_spec(path, &c, &p);
-        if (r < 0)
-                return r;
-
-        return cg_get_path(c ? c : SYSTEMD_CGROUP_CONTROLLER, p ? p : "/", NULL, result);
-}
-
-int cg_get_root_path(char **path) {
-        char *p, *e;
-        int r;
-
-        assert(path);
-
-        r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, 1, &p);
-        if (r < 0)
-                return r;
-
-        e = endswith(p, "/" SPECIAL_SYSTEM_SLICE);
-        if (e)
-                *e = 0;
-
-        *path = p;
-        return 0;
-}
-
-int cg_shift_path(const char *cgroup, const char *root, const char **shifted) {
-        _cleanup_free_ char *rt = NULL;
-        char *p;
-        int r;
-
-        assert(cgroup);
-        assert(shifted);
-
-        if (!root) {
-                /* If the root was specified let's use that, otherwise
-                 * let's determine it from PID 1 */
-
-                r = cg_get_root_path(&rt);
-                if (r < 0)
-                        return r;
-
-                root = rt;
-        }
-
-        p = path_startswith(cgroup, root);
-        if (p)
-                *shifted = p - 1;
-        else
-                *shifted = cgroup;
-
-        return 0;
-}
-
-int cg_pid_get_path_shifted(pid_t pid, const char *root, char **cgroup) {
-        _cleanup_free_ char *raw = NULL;
-        const char *c;
-        int r;
-
-        assert(pid >= 0);
-        assert(cgroup);
-
-        r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &raw);
-        if (r < 0)
-                return r;
-
-        r = cg_shift_path(raw, root, &c);
-        if (r < 0)
-                return r;
-
-        if (c == raw) {
-                *cgroup = raw;
-                raw = NULL;
-        } else {
-                char *n;
-
-                n = strdup(c);
-                if (!n)
-                        return -ENOMEM;
-
-                *cgroup = n;
-        }
-
-        return 0;
-}
-
-int cg_path_decode_unit(const char *cgroup, char **unit){
-        char *c, *s;
-        size_t n;
-
-        assert(cgroup);
-        assert(unit);
-
-        n = strcspn(cgroup, "/");
-        if (n < 3)
-                return -ENXIO;
-
-        c = strndupa(cgroup, n);
-        c = cg_unescape(c);
-
-        if (!unit_name_is_valid(c, UNIT_NAME_PLAIN|UNIT_NAME_INSTANCE))
-                return -ENXIO;
-
-        s = strdup(c);
-        if (!s)
-                return -ENOMEM;
-
-        *unit = s;
-        return 0;
-}
-
-static bool valid_slice_name(const char *p, size_t n) {
-
-        if (!p)
-                return false;
-
-        if (n < strlen("x.slice"))
-                return false;
-
-        if (memcmp(p + n - 6, ".slice", 6) == 0) {
-                char buf[n+1], *c;
-
-                memcpy(buf, p, n);
-                buf[n] = 0;
-
-                c = cg_unescape(buf);
-
-                return unit_name_is_valid(c, UNIT_NAME_PLAIN);
-        }
-
-        return false;
-}
-
-static const char *skip_slices(const char *p) {
-        assert(p);
-
-        /* Skips over all slice assignments */
-
-        for (;;) {
-                size_t n;
-
-                p += strspn(p, "/");
-
-                n = strcspn(p, "/");
-                if (!valid_slice_name(p, n))
-                        return p;
-
-                p += n;
-        }
-}
-
-int cg_path_get_unit(const char *path, char **ret) {
-        const char *e;
-        char *unit;
-        int r;
-
-        assert(path);
-        assert(ret);
-
-        e = skip_slices(path);
-
-        r = cg_path_decode_unit(e, &unit);
-        if (r < 0)
-                return r;
-
-        /* We skipped over the slices, don't accept any now */
-        if (endswith(unit, ".slice")) {
-                free(unit);
-                return -ENXIO;
-        }
-
-        *ret = unit;
-        return 0;
-}
-
-int cg_pid_get_unit(pid_t pid, char **unit) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        assert(unit);
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_unit(cgroup, unit);
-}
-
-/**
- * Skip session-*.scope, but require it to be there.
- */
-static const char *skip_session(const char *p) {
-        size_t n;
-
-        if (isempty(p))
-                return NULL;
-
-        p += strspn(p, "/");
-
-        n = strcspn(p, "/");
-        if (n < strlen("session-x.scope"))
-                return NULL;
-
-        if (memcmp(p, "session-", 8) == 0 && memcmp(p + n - 6, ".scope", 6) == 0) {
-                char buf[n - 8 - 6 + 1];
-
-                memcpy(buf, p + 8, n - 8 - 6);
-                buf[n - 8 - 6] = 0;
-
-                /* Note that session scopes never need unescaping,
-                 * since they cannot conflict with the kernel's own
-                 * names, hence we don't need to call cg_unescape()
-                 * here. */
-
-                if (!session_id_valid(buf))
-                        return false;
-
-                p += n;
-                p += strspn(p, "/");
-                return p;
-        }
-
-        return NULL;
-}
-
-/**
- * Skip user@*.service, but require it to be there.
- */
-static const char *skip_user_manager(const char *p) {
-        size_t n;
-
-        if (isempty(p))
-                return NULL;
-
-        p += strspn(p, "/");
-
-        n = strcspn(p, "/");
-        if (n < strlen("user@x.service"))
-                return NULL;
-
-        if (memcmp(p, "user@", 5) == 0 && memcmp(p + n - 8, ".service", 8) == 0) {
-                char buf[n - 5 - 8 + 1];
-
-                memcpy(buf, p + 5, n - 5 - 8);
-                buf[n - 5 - 8] = 0;
-
-                /* Note that user manager services never need unescaping,
-                 * since they cannot conflict with the kernel's own
-                 * names, hence we don't need to call cg_unescape()
-                 * here. */
-
-                if (parse_uid(buf, NULL) < 0)
-                        return NULL;
-
-                p += n;
-                p += strspn(p, "/");
-
-                return p;
-        }
-
-        return NULL;
-}
-
-static const char *skip_user_prefix(const char *path) {
-        const char *e, *t;
-
-        assert(path);
-
-        /* Skip slices, if there are any */
-        e = skip_slices(path);
-
-        /* Skip the user manager, if it's in the path now... */
-        t = skip_user_manager(e);
-        if (t)
-                return t;
-
-        /* Alternatively skip the user session if it is in the path... */
-        return skip_session(e);
-}
-
-int cg_path_get_user_unit(const char *path, char **ret) {
-        const char *t;
-
-        assert(path);
-        assert(ret);
-
-        t = skip_user_prefix(path);
-        if (!t)
-                return -ENXIO;
-
-        /* And from here on it looks pretty much the same as for a
-         * system unit, hence let's use the same parser from here
-         * on. */
-        return cg_path_get_unit(t, ret);
-}
-
-int cg_pid_get_user_unit(pid_t pid, char **unit) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        assert(unit);
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_user_unit(cgroup, unit);
-}
-
-int cg_path_get_machine_name(const char *path, char **machine) {
-        _cleanup_free_ char *u = NULL, *sl = NULL;
-        int r;
-
-        r = cg_path_get_unit(path, &u);
-        if (r < 0)
-                return r;
-
-        sl = strjoin("/run/systemd/machines/unit:", u, NULL);
-        if (!sl)
-                return -ENOMEM;
-
-        return readlink_malloc(sl, machine);
-}
-
-int cg_pid_get_machine_name(pid_t pid, char **machine) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        assert(machine);
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_machine_name(cgroup, machine);
-}
-
-int cg_path_get_session(const char *path, char **session) {
-        _cleanup_free_ char *unit = NULL;
-        char *start, *end;
-        int r;
-
-        assert(path);
-
-        r = cg_path_get_unit(path, &unit);
-        if (r < 0)
-                return r;
-
-        start = startswith(unit, "session-");
-        if (!start)
-                return -ENXIO;
-        end = endswith(start, ".scope");
-        if (!end)
-                return -ENXIO;
-
-        *end = 0;
-        if (!session_id_valid(start))
-                return -ENXIO;
-
-        if (session) {
-                char *rr;
-
-                rr = strdup(start);
-                if (!rr)
-                        return -ENOMEM;
-
-                *session = rr;
-        }
-
-        return 0;
-}
-
-int cg_pid_get_session(pid_t pid, char **session) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_session(cgroup, session);
-}
-
-int cg_path_get_owner_uid(const char *path, uid_t *uid) {
-        _cleanup_free_ char *slice = NULL;
-        char *start, *end;
-        int r;
-
-        assert(path);
-
-        r = cg_path_get_slice(path, &slice);
-        if (r < 0)
-                return r;
-
-        start = startswith(slice, "user-");
-        if (!start)
-                return -ENXIO;
-        end = endswith(start, ".slice");
-        if (!end)
-                return -ENXIO;
-
-        *end = 0;
-        if (parse_uid(start, uid) < 0)
-                return -ENXIO;
-
-        return 0;
-}
-
-int cg_pid_get_owner_uid(pid_t pid, uid_t *uid) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_owner_uid(cgroup, uid);
-}
-
-int cg_path_get_slice(const char *p, char **slice) {
-        const char *e = NULL;
-
-        assert(p);
-        assert(slice);
-
-        /* Finds the right-most slice unit from the beginning, but
-         * stops before we come to the first non-slice unit. */
-
-        for (;;) {
-                size_t n;
-
-                p += strspn(p, "/");
-
-                n = strcspn(p, "/");
-                if (!valid_slice_name(p, n)) {
-
-                        if (!e) {
-                                char *s;
-
-                                s = strdup("-.slice");
-                                if (!s)
-                                        return -ENOMEM;
-
-                                *slice = s;
-                                return 0;
-                        }
-
-                        return cg_path_decode_unit(e, slice);
-                }
-
-                e = p;
-                p += n;
-        }
-}
-
-int cg_pid_get_slice(pid_t pid, char **slice) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        assert(slice);
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_slice(cgroup, slice);
-}
-
-int cg_path_get_user_slice(const char *p, char **slice) {
-        const char *t;
-        assert(p);
-        assert(slice);
-
-        t = skip_user_prefix(p);
-        if (!t)
-                return -ENXIO;
-
-        /* And now it looks pretty much the same as for a system
-         * slice, so let's just use the same parser from here on. */
-        return cg_path_get_slice(t, slice);
-}
-
-int cg_pid_get_user_slice(pid_t pid, char **slice) {
-        _cleanup_free_ char *cgroup = NULL;
-        int r;
-
-        assert(slice);
-
-        r = cg_pid_get_path_shifted(pid, NULL, &cgroup);
-        if (r < 0)
-                return r;
-
-        return cg_path_get_user_slice(cgroup, slice);
-}
-
-char *cg_escape(const char *p) {
-        bool need_prefix = false;
-
-        /* This implements very minimal escaping for names to be used
-         * as file names in the cgroup tree: any name which might
-         * conflict with a kernel name or is prefixed with '_' is
-         * prefixed with a '_'. That way, when reading cgroup names it
-         * is sufficient to remove a single prefixing underscore if
-         * there is one. */
-
-        /* The return value of this function (unlike cg_unescape())
-         * needs free()! */
-
-        if (p[0] == 0 ||
-            p[0] == '_' ||
-            p[0] == '.' ||
-            streq(p, "notify_on_release") ||
-            streq(p, "release_agent") ||
-            streq(p, "tasks"))
-                need_prefix = true;
-        else {
-                const char *dot;
-
-                dot = strrchr(p, '.');
-                if (dot) {
-
-                        if (dot - p == 6 && memcmp(p, "cgroup", 6) == 0)
-                                need_prefix = true;
-                        else {
-                                char *n;
-
-                                n = strndupa(p, dot - p);
-
-                                if (check_hierarchy(n) >= 0)
-                                        need_prefix = true;
-                        }
-                }
-        }
-
-        if (need_prefix)
-                return strappend("_", p);
-        else
-                return strdup(p);
-}
-
-char *cg_unescape(const char *p) {
-        assert(p);
-
-        /* The return value of this function (unlike cg_escape())
-         * doesn't need free()! */
-
-        if (p[0] == '_')
-                return (char*) p+1;
-
-        return (char*) p;
-}
-
-#define CONTROLLER_VALID                        \
-        DIGITS LETTERS                          \
-        "_"
-
-bool cg_controller_is_valid(const char *p) {
-        const char *t, *s;
-
-        if (!p)
-                return false;
-
-        s = startswith(p, "name=");
-        if (s)
-                p = s;
-
-        if (*p == 0 || *p == '_')
-                return false;
-
-        for (t = p; *t; t++)
-                if (!strchr(CONTROLLER_VALID, *t))
-                        return false;
-
-        if (t - p > FILENAME_MAX)
-                return false;
-
-        return true;
-}
-
-int cg_slice_to_path(const char *unit, char **ret) {
-        _cleanup_free_ char *p = NULL, *s = NULL, *e = NULL;
-        const char *dash;
-        int r;
-
-        assert(unit);
-        assert(ret);
-
-        if (streq(unit, "-.slice")) {
-                char *x;
-
-                x = strdup("");
-                if (!x)
-                        return -ENOMEM;
-                *ret = x;
-                return 0;
-        }
-
-        if (!unit_name_is_valid(unit, UNIT_NAME_PLAIN))
-                return -EINVAL;
-
-        if (!endswith(unit, ".slice"))
-                return -EINVAL;
-
-        r = unit_name_to_prefix(unit, &p);
-        if (r < 0)
-                return r;
-
-        dash = strchr(p, '-');
-
-        /* Don't allow initial dashes */
-        if (dash == p)
-                return -EINVAL;
-
-        while (dash) {
-                _cleanup_free_ char *escaped = NULL;
-                char n[dash - p + sizeof(".slice")];
-
-                /* Don't allow trailing or double dashes */
-                if (dash[1] == 0 || dash[1] == '-')
-                        return -EINVAL;
-
-                strcpy(stpncpy(n, p, dash - p), ".slice");
-                if (!unit_name_is_valid(n, UNIT_NAME_PLAIN))
-                        return -EINVAL;
-
-                escaped = cg_escape(n);
-                if (!escaped)
-                        return -ENOMEM;
-
-                if (!strextend(&s, escaped, "/", NULL))
-                        return -ENOMEM;
-
-                dash = strchr(dash+1, '-');
-        }
-
-        e = cg_escape(unit);
-        if (!e)
-                return -ENOMEM;
-
-        if (!strextend(&s, e, NULL))
-                return -ENOMEM;
-
-        *ret = s;
-        s = NULL;
-
-        return 0;
-}
-
-int cg_set_attribute(const char *controller, const char *path, const char *attribute, const char *value) {
-        _cleanup_free_ char *p = NULL;
-        int r;
-
-        r = cg_get_path(controller, path, attribute, &p);
-        if (r < 0)
-                return r;
-
-        return write_string_file_no_create(p, value);
-}
-
-int cg_get_attribute(const char *controller, const char *path, const char *attribute, char **ret) {
-        _cleanup_free_ char *p = NULL;
-        int r;
-
-        r = cg_get_path(controller, path, attribute, &p);
-        if (r < 0)
-                return r;
-
-        return read_one_line_file(p, ret);
-}
-
-static const char mask_names[] =
-        "cpu\0"
-        "cpuacct\0"
-        "blkio\0"
-        "memory\0"
-        "devices\0";
-
-int cg_create_everywhere(CGroupControllerMask supported, CGroupControllerMask mask, const char *path) {
-        CGroupControllerMask bit = 1;
-        const char *n;
-        int r;
-
-        /* This one will create a cgroup in our private tree, but also
-         * duplicate it in the trees specified in mask, and remove it
-         * in all others */
-
-        /* First create the cgroup in our own hierarchy. */
-        r = cg_create(SYSTEMD_CGROUP_CONTROLLER, path);
-        if (r < 0)
-                return r;
-
-        /* Then, do the same in the other hierarchies */
-        NULSTR_FOREACH(n, mask_names) {
-                if (mask & bit)
-                        cg_create(n, path);
-                else if (supported & bit)
-                        cg_trim(n, path, true);
-
-                bit <<= 1;
-        }
-
-        return 0;
-}
-
-int cg_attach_everywhere(CGroupControllerMask supported, const char *path, pid_t pid, cg_migrate_callback_t path_callback, void *userdata) {
-        CGroupControllerMask bit = 1;
-        const char *n;
-        int r;
-
-        r = cg_attach(SYSTEMD_CGROUP_CONTROLLER, path, pid);
-        if (r < 0)
-                return r;
-
-        NULSTR_FOREACH(n, mask_names) {
-
-                if (supported & bit) {
-                        const char *p = NULL;
-
-                        if (path_callback)
-                                p = path_callback(bit, userdata);
-
-                        if (!p)
-                                p = path;
-
-                        cg_attach_fallback(n, path, pid);
-                }
-
-                bit <<= 1;
-        }
-
-        return 0;
-}
-
-int cg_attach_many_everywhere(CGroupControllerMask supported, const char *path, Set* pids, cg_migrate_callback_t path_callback, void *userdata) {
-        Iterator i;
-        void *pidp;
-        int r = 0;
-
-        SET_FOREACH(pidp, pids, i) {
-                pid_t pid = PTR_TO_LONG(pidp);
-                int q;
-
-                q = cg_attach_everywhere(supported, path, pid, path_callback, userdata);
-                if (q < 0)
-                        r = q;
-        }
-
-        return r;
-}
-
-int cg_migrate_everywhere(CGroupControllerMask supported, const char *from, const char *to, cg_migrate_callback_t to_callback, void *userdata) {
-        CGroupControllerMask bit = 1;
-        const char *n;
-        int r;
-
-        if (!path_equal(from, to))  {
-                r = cg_migrate_recursive(SYSTEMD_CGROUP_CONTROLLER, from, SYSTEMD_CGROUP_CONTROLLER, to, false, true);
-                if (r < 0)
-                        return r;
-        }
-
-        NULSTR_FOREACH(n, mask_names) {
-                if (supported & bit) {
-                        const char *p = NULL;
-
-                        if (to_callback)
-                                p = to_callback(bit, userdata);
-
-                        if (!p)
-                                p = to;
-
-                        cg_migrate_recursive_fallback(SYSTEMD_CGROUP_CONTROLLER, to, n, p, false, false);
-                }
-
-                bit <<= 1;
-        }
-
-        return 0;
-}
-
-int cg_trim_everywhere(CGroupControllerMask supported, const char *path, bool delete_root) {
-        CGroupControllerMask bit = 1;
-        const char *n;
-        int r;
-
-        r = cg_trim(SYSTEMD_CGROUP_CONTROLLER, path, delete_root);
-        if (r < 0)
-                return r;
-
-        NULSTR_FOREACH(n, mask_names) {
-                if (supported & bit)
-                        cg_trim(n, path, delete_root);
-
-                bit <<= 1;
-        }
-
-        return 0;
-}
-
-CGroupControllerMask cg_mask_supported(void) {
-        CGroupControllerMask bit = 1, mask = 0;
-        const char *n;
-
-        NULSTR_FOREACH(n, mask_names) {
-                if (check_hierarchy(n) >= 0)
-                        mask |= bit;
-
-                bit <<= 1;
-        }
-
-        return mask;
-}
-
-int cg_kernel_controllers(Set *controllers) {
-        _cleanup_fclose_ FILE *f = NULL;
-        char buf[LINE_MAX];
-        int r;
-
-        assert(controllers);
-
-        f = fopen("/proc/cgroups", "re");
-        if (!f) {
-                if (errno == ENOENT)
-                        return 0;
-                return -errno;
-        }
-
-        /* Ignore the header line */
-        (void) fgets(buf, sizeof(buf), f);
-
-        for (;;) {
-                char *controller;
-                int enabled = 0;
-
-                errno = 0;
-                if (fscanf(f, "%ms %*i %*i %i", &controller, &enabled) != 2) {
-
-                        if (feof(f))
-                                break;
-
-                        if (ferror(f) && errno)
-                                return -errno;
-
-                        return -EBADMSG;
-                }
-
-                if (!enabled) {
-                        free(controller);
-                        continue;
-                }
-
-                if (!filename_is_valid(controller)) {
-                        free(controller);
-                        return -EBADMSG;
-                }
-
-                r = set_consume(controllers, controller);
-                if (r < 0)
-                        return r;
-        }
-
-        return 0;
-}