| /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
| |
| /*** |
| This file is part of systemd. |
| |
| Copyright 2011 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 <string.h> |
| #include <sys/mount.h> |
| #include <unistd.h> |
| |
| #include "alloc-util.h" |
| #include "bus-common-errors.h" |
| #include "bus-error.h" |
| #include "bus-util.h" |
| #include "clean-ipc.h" |
| #include "conf-parser.h" |
| #include "escape.h" |
| #include "fd-util.h" |
| #include "fileio.h" |
| #include "formats-util.h" |
| #include "fs-util.h" |
| #include "hashmap.h" |
| #include "label.h" |
| #include "logind-user.h" |
| #include "mkdir.h" |
| #include "mount-util.h" |
| #include "parse-util.h" |
| #include "path-util.h" |
| #include "rm-rf.h" |
| #include "smack-util.h" |
| #include "special.h" |
| #include "stdio-util.h" |
| #include "string-table.h" |
| #include "unit-name.h" |
| #include "user-util.h" |
| #include "util.h" |
| |
| int user_new(User **out, Manager *m, uid_t uid, gid_t gid, const char *name) { |
| _cleanup_(user_freep) User *u = NULL; |
| char lu[DECIMAL_STR_MAX(uid_t) + 1]; |
| int r; |
| |
| assert(out); |
| assert(m); |
| assert(name); |
| |
| u = new0(User, 1); |
| if (!u) |
| return -ENOMEM; |
| |
| u->manager = m; |
| u->uid = uid; |
| u->gid = gid; |
| xsprintf(lu, UID_FMT, uid); |
| |
| u->name = strdup(name); |
| if (!u->name) |
| return -ENOMEM; |
| |
| if (asprintf(&u->state_file, "/run/systemd/users/"UID_FMT, uid) < 0) |
| return -ENOMEM; |
| |
| if (asprintf(&u->runtime_path, "/run/user/"UID_FMT, uid) < 0) |
| return -ENOMEM; |
| |
| r = slice_build_subslice(SPECIAL_USER_SLICE, lu, &u->slice); |
| if (r < 0) |
| return r; |
| |
| r = unit_name_build("user", lu, ".service", &u->service); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(m->users, UID_TO_PTR(uid), u); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(m->user_units, u->slice, u); |
| if (r < 0) |
| return r; |
| |
| r = hashmap_put(m->user_units, u->service, u); |
| if (r < 0) |
| return r; |
| |
| *out = u; |
| u = NULL; |
| return 0; |
| } |
| |
| User *user_free(User *u) { |
| if (!u) |
| return NULL; |
| |
| if (u->in_gc_queue) |
| LIST_REMOVE(gc_queue, u->manager->user_gc_queue, u); |
| |
| while (u->sessions) |
| session_free(u->sessions); |
| |
| if (u->service) |
| hashmap_remove_value(u->manager->user_units, u->service, u); |
| |
| if (u->slice) |
| hashmap_remove_value(u->manager->user_units, u->slice, u); |
| |
| hashmap_remove_value(u->manager->users, UID_TO_PTR(u->uid), u); |
| |
| u->slice_job = mfree(u->slice_job); |
| u->service_job = mfree(u->service_job); |
| |
| u->service = mfree(u->service); |
| u->slice = mfree(u->slice); |
| u->runtime_path = mfree(u->runtime_path); |
| u->state_file = mfree(u->state_file); |
| u->name = mfree(u->name); |
| |
| return mfree(u); |
| } |
| |
| static int user_save_internal(User *u) { |
| _cleanup_free_ char *temp_path = NULL; |
| _cleanup_fclose_ FILE *f = NULL; |
| int r; |
| |
| assert(u); |
| assert(u->state_file); |
| |
| r = mkdir_safe_label("/run/systemd/users", 0755, 0, 0); |
| if (r < 0) |
| goto fail; |
| |
| r = fopen_temporary(u->state_file, &f, &temp_path); |
| if (r < 0) |
| goto fail; |
| |
| fchmod(fileno(f), 0644); |
| |
| fprintf(f, |
| "# This is private data. Do not parse.\n" |
| "NAME=%s\n" |
| "STATE=%s\n", |
| u->name, |
| user_state_to_string(user_get_state(u))); |
| |
| /* LEGACY: no-one reads RUNTIME= anymore, drop it at some point */ |
| if (u->runtime_path) |
| fprintf(f, "RUNTIME=%s\n", u->runtime_path); |
| |
| if (u->service_job) |
| fprintf(f, "SERVICE_JOB=%s\n", u->service_job); |
| |
| if (u->slice_job) |
| fprintf(f, "SLICE_JOB=%s\n", u->slice_job); |
| |
| if (u->display) |
| fprintf(f, "DISPLAY=%s\n", u->display->id); |
| |
| if (dual_timestamp_is_set(&u->timestamp)) |
| fprintf(f, |
| "REALTIME="USEC_FMT"\n" |
| "MONOTONIC="USEC_FMT"\n", |
| u->timestamp.realtime, |
| u->timestamp.monotonic); |
| |
| if (u->sessions) { |
| Session *i; |
| bool first; |
| |
| fputs("SESSIONS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->id, f); |
| } |
| |
| fputs("\nSEATS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (!i->seat) |
| continue; |
| |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->seat->id, f); |
| } |
| |
| fputs("\nACTIVE_SESSIONS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (!session_is_active(i)) |
| continue; |
| |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->id, f); |
| } |
| |
| fputs("\nONLINE_SESSIONS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (session_get_state(i) == SESSION_CLOSING) |
| continue; |
| |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->id, f); |
| } |
| |
| fputs("\nACTIVE_SEATS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (!session_is_active(i) || !i->seat) |
| continue; |
| |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->seat->id, f); |
| } |
| |
| fputs("\nONLINE_SEATS=", f); |
| first = true; |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| if (session_get_state(i) == SESSION_CLOSING || !i->seat) |
| continue; |
| |
| if (first) |
| first = false; |
| else |
| fputc(' ', f); |
| |
| fputs(i->seat->id, f); |
| } |
| fputc('\n', f); |
| } |
| |
| r = fflush_and_check(f); |
| if (r < 0) |
| goto fail; |
| |
| if (rename(temp_path, u->state_file) < 0) { |
| r = -errno; |
| goto fail; |
| } |
| |
| return 0; |
| |
| fail: |
| (void) unlink(u->state_file); |
| |
| if (temp_path) |
| (void) unlink(temp_path); |
| |
| return log_error_errno(r, "Failed to save user data %s: %m", u->state_file); |
| } |
| |
| int user_save(User *u) { |
| assert(u); |
| |
| if (!u->started) |
| return 0; |
| |
| return user_save_internal (u); |
| } |
| |
| int user_load(User *u) { |
| _cleanup_free_ char *display = NULL, *realtime = NULL, *monotonic = NULL; |
| Session *s = NULL; |
| int r; |
| |
| assert(u); |
| |
| r = parse_env_file(u->state_file, NEWLINE, |
| "SERVICE_JOB", &u->service_job, |
| "SLICE_JOB", &u->slice_job, |
| "DISPLAY", &display, |
| "REALTIME", &realtime, |
| "MONOTONIC", &monotonic, |
| NULL); |
| if (r < 0) { |
| if (r == -ENOENT) |
| return 0; |
| |
| log_error_errno(r, "Failed to read %s: %m", u->state_file); |
| return r; |
| } |
| |
| if (display) |
| s = hashmap_get(u->manager->sessions, display); |
| |
| if (s && s->display && display_is_local(s->display)) |
| u->display = s; |
| |
| if (realtime) { |
| unsigned long long l; |
| if (sscanf(realtime, "%llu", &l) > 0) |
| u->timestamp.realtime = l; |
| } |
| |
| if (monotonic) { |
| unsigned long long l; |
| if (sscanf(monotonic, "%llu", &l) > 0) |
| u->timestamp.monotonic = l; |
| } |
| |
| return r; |
| } |
| |
| static int user_mkdir_runtime_path(User *u) { |
| int r; |
| |
| assert(u); |
| |
| r = mkdir_safe_label("/run/user", 0755, 0, 0); |
| if (r < 0) |
| return log_error_errno(r, "Failed to create /run/user: %m"); |
| |
| if (path_is_mount_point(u->runtime_path, 0) <= 0) { |
| _cleanup_free_ char *t = NULL; |
| |
| (void) mkdir_label(u->runtime_path, 0700); |
| |
| if (mac_smack_use()) |
| r = asprintf(&t, "mode=0700,smackfsroot=*,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); |
| else |
| r = asprintf(&t, "mode=0700,uid=" UID_FMT ",gid=" GID_FMT ",size=%zu", u->uid, u->gid, u->manager->runtime_dir_size); |
| if (r < 0) { |
| r = log_oom(); |
| goto fail; |
| } |
| |
| r = mount("tmpfs", u->runtime_path, "tmpfs", MS_NODEV|MS_NOSUID, t); |
| if (r < 0) { |
| if (errno != EPERM) { |
| r = log_error_errno(errno, "Failed to mount per-user tmpfs directory %s: %m", u->runtime_path); |
| goto fail; |
| } |
| |
| /* Lacking permissions, maybe |
| * CAP_SYS_ADMIN-less container? In this case, |
| * just use a normal directory. */ |
| |
| r = chmod_and_chown(u->runtime_path, 0700, u->uid, u->gid); |
| if (r < 0) { |
| log_error_errno(r, "Failed to change runtime directory ownership and mode: %m"); |
| goto fail; |
| } |
| } |
| |
| r = label_fix(u->runtime_path, false, false); |
| if (r < 0) |
| log_warning_errno(r, "Failed to fix label of '%s', ignoring: %m", u->runtime_path); |
| } |
| |
| return 0; |
| |
| fail: |
| /* Try to clean up, but ignore errors */ |
| (void) rmdir(u->runtime_path); |
| return r; |
| } |
| |
| static int user_start_slice(User *u) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| const char *description; |
| char *job; |
| int r; |
| |
| assert(u); |
| |
| u->slice_job = mfree(u->slice_job); |
| description = strjoina("User Slice of ", u->name); |
| |
| r = manager_start_slice( |
| u->manager, |
| u->slice, |
| description, |
| "systemd-logind.service", |
| "systemd-user-sessions.service", |
| u->manager->user_tasks_max, |
| &error, |
| &job); |
| if (r < 0) { |
| /* we don't fail due to this, let's try to continue */ |
| if (!sd_bus_error_has_name(&error, BUS_ERROR_UNIT_EXISTS)) |
| log_error_errno(r, "Failed to start user slice %s, ignoring: %s (%s)", u->slice, bus_error_message(&error, r), error.name); |
| } else { |
| u->slice_job = job; |
| } |
| |
| return 0; |
| } |
| |
| static int user_start_service(User *u) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| char *job; |
| int r; |
| |
| assert(u); |
| |
| u->service_job = mfree(u->service_job); |
| |
| r = manager_start_unit( |
| u->manager, |
| u->service, |
| &error, |
| &job); |
| if (r < 0) { |
| /* we don't fail due to this, let's try to continue */ |
| log_error_errno(r, "Failed to start user service, ignoring: %s", bus_error_message(&error, r)); |
| } else { |
| u->service_job = job; |
| } |
| |
| return 0; |
| } |
| |
| int user_start(User *u) { |
| int r; |
| |
| assert(u); |
| |
| if (u->started && !u->stopping) |
| return 0; |
| |
| /* |
| * If u->stopping is set, the user is marked for removal and the slice |
| * and service stop-jobs are queued. We have to clear that flag before |
| * queing the start-jobs again. If they succeed, the user object can be |
| * re-used just fine (pid1 takes care of job-ordering and proper |
| * restart), but if they fail, we want to force another user_stop() so |
| * possibly pending units are stopped. |
| * Note that we don't clear u->started, as we have no clue what state |
| * the user is in on failure here. Hence, we pretend the user is |
| * running so it will be properly taken down by GC. However, we clearly |
| * return an error from user_start() in that case, so no further |
| * reference to the user is taken. |
| */ |
| u->stopping = false; |
| |
| if (!u->started) { |
| log_debug("New user %s logged in.", u->name); |
| |
| /* Make XDG_RUNTIME_DIR */ |
| r = user_mkdir_runtime_path(u); |
| if (r < 0) |
| return r; |
| } |
| |
| /* Create cgroup */ |
| r = user_start_slice(u); |
| if (r < 0) |
| return r; |
| |
| /* Save the user data so far, because pam_systemd will read the |
| * XDG_RUNTIME_DIR out of it while starting up systemd --user. |
| * We need to do user_save_internal() because we have not |
| * "officially" started yet. */ |
| user_save_internal(u); |
| |
| /* Spawn user systemd */ |
| r = user_start_service(u); |
| if (r < 0) |
| return r; |
| |
| if (!u->started) { |
| if (!dual_timestamp_is_set(&u->timestamp)) |
| dual_timestamp_get(&u->timestamp); |
| user_send_signal(u, true); |
| u->started = true; |
| } |
| |
| /* Save new user data */ |
| user_save(u); |
| |
| return 0; |
| } |
| |
| static int user_stop_slice(User *u) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| char *job; |
| int r; |
| |
| assert(u); |
| |
| r = manager_stop_unit(u->manager, u->slice, &error, &job); |
| if (r < 0) { |
| log_error("Failed to stop user slice: %s", bus_error_message(&error, r)); |
| return r; |
| } |
| |
| free(u->slice_job); |
| u->slice_job = job; |
| |
| return r; |
| } |
| |
| static int user_stop_service(User *u) { |
| _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL; |
| char *job; |
| int r; |
| |
| assert(u); |
| |
| r = manager_stop_unit(u->manager, u->service, &error, &job); |
| if (r < 0) { |
| log_error("Failed to stop user service: %s", bus_error_message(&error, r)); |
| return r; |
| } |
| |
| free(u->service_job); |
| u->service_job = job; |
| |
| return r; |
| } |
| |
| static int user_remove_runtime_path(User *u) { |
| int r; |
| |
| assert(u); |
| |
| r = rm_rf(u->runtime_path, 0); |
| if (r < 0) |
| log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); |
| |
| /* Ignore cases where the directory isn't mounted, as that's |
| * quite possible, if we lacked the permissions to mount |
| * something */ |
| r = umount2(u->runtime_path, MNT_DETACH); |
| if (r < 0 && errno != EINVAL && errno != ENOENT) |
| log_error_errno(errno, "Failed to unmount user runtime directory %s: %m", u->runtime_path); |
| |
| r = rm_rf(u->runtime_path, REMOVE_ROOT); |
| if (r < 0) |
| log_error_errno(r, "Failed to remove runtime directory %s: %m", u->runtime_path); |
| |
| return r; |
| } |
| |
| int user_stop(User *u, bool force) { |
| Session *s; |
| int r = 0, k; |
| assert(u); |
| |
| /* Stop jobs have already been queued */ |
| if (u->stopping) { |
| user_save(u); |
| return r; |
| } |
| |
| LIST_FOREACH(sessions_by_user, s, u->sessions) { |
| k = session_stop(s, force); |
| if (k < 0) |
| r = k; |
| } |
| |
| /* Kill systemd */ |
| k = user_stop_service(u); |
| if (k < 0) |
| r = k; |
| |
| /* Kill cgroup */ |
| k = user_stop_slice(u); |
| if (k < 0) |
| r = k; |
| |
| u->stopping = true; |
| |
| user_save(u); |
| |
| return r; |
| } |
| |
| int user_finalize(User *u) { |
| Session *s; |
| int r = 0, k; |
| |
| assert(u); |
| |
| if (u->started) |
| log_debug("User %s logged out.", u->name); |
| |
| LIST_FOREACH(sessions_by_user, s, u->sessions) { |
| k = session_finalize(s); |
| if (k < 0) |
| r = k; |
| } |
| |
| /* Kill XDG_RUNTIME_DIR */ |
| k = user_remove_runtime_path(u); |
| if (k < 0) |
| r = k; |
| |
| /* Clean SysV + POSIX IPC objects */ |
| if (u->manager->remove_ipc) { |
| k = clean_ipc(u->uid); |
| if (k < 0) |
| r = k; |
| } |
| |
| unlink(u->state_file); |
| user_add_to_gc_queue(u); |
| |
| if (u->started) { |
| user_send_signal(u, false); |
| u->started = false; |
| } |
| |
| return r; |
| } |
| |
| int user_get_idle_hint(User *u, dual_timestamp *t) { |
| Session *s; |
| bool idle_hint = true; |
| dual_timestamp ts = DUAL_TIMESTAMP_NULL; |
| |
| assert(u); |
| |
| LIST_FOREACH(sessions_by_user, s, u->sessions) { |
| dual_timestamp k; |
| int ih; |
| |
| ih = session_get_idle_hint(s, &k); |
| if (ih < 0) |
| return ih; |
| |
| if (!ih) { |
| if (!idle_hint) { |
| if (k.monotonic < ts.monotonic) |
| ts = k; |
| } else { |
| idle_hint = false; |
| ts = k; |
| } |
| } else if (idle_hint) { |
| |
| if (k.monotonic > ts.monotonic) |
| ts = k; |
| } |
| } |
| |
| if (t) |
| *t = ts; |
| |
| return idle_hint; |
| } |
| |
| int user_check_linger_file(User *u) { |
| _cleanup_free_ char *cc = NULL; |
| char *p = NULL; |
| |
| cc = cescape(u->name); |
| if (!cc) |
| return -ENOMEM; |
| |
| p = strjoina("/var/lib/systemd/linger/", cc); |
| |
| return access(p, F_OK) >= 0; |
| } |
| |
| bool user_check_gc(User *u, bool drop_not_started) { |
| assert(u); |
| |
| if (drop_not_started && !u->started) |
| return false; |
| |
| if (u->sessions) |
| return true; |
| |
| if (user_check_linger_file(u) > 0) |
| return true; |
| |
| if (u->slice_job && manager_job_is_active(u->manager, u->slice_job)) |
| return true; |
| |
| if (u->service_job && manager_job_is_active(u->manager, u->service_job)) |
| return true; |
| |
| return false; |
| } |
| |
| void user_add_to_gc_queue(User *u) { |
| assert(u); |
| |
| if (u->in_gc_queue) |
| return; |
| |
| LIST_PREPEND(gc_queue, u->manager->user_gc_queue, u); |
| u->in_gc_queue = true; |
| } |
| |
| UserState user_get_state(User *u) { |
| Session *i; |
| |
| assert(u); |
| |
| if (u->stopping) |
| return USER_CLOSING; |
| |
| if (!u->started || u->slice_job || u->service_job) |
| return USER_OPENING; |
| |
| if (u->sessions) { |
| bool all_closing = true; |
| |
| LIST_FOREACH(sessions_by_user, i, u->sessions) { |
| SessionState state; |
| |
| state = session_get_state(i); |
| if (state == SESSION_ACTIVE) |
| return USER_ACTIVE; |
| if (state != SESSION_CLOSING) |
| all_closing = false; |
| } |
| |
| return all_closing ? USER_CLOSING : USER_ONLINE; |
| } |
| |
| if (user_check_linger_file(u) > 0) |
| return USER_LINGERING; |
| |
| return USER_CLOSING; |
| } |
| |
| int user_kill(User *u, int signo) { |
| assert(u); |
| |
| return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL); |
| } |
| |
| static bool elect_display_filter(Session *s) { |
| /* Return true if the session is a candidate for the user’s ‘primary |
| * session’ or ‘display’. */ |
| assert(s); |
| |
| return (s->class == SESSION_USER && !s->stopping); |
| } |
| |
| static int elect_display_compare(Session *s1, Session *s2) { |
| /* Indexed by SessionType. Lower numbers mean more preferred. */ |
| const int type_ranks[_SESSION_TYPE_MAX] = { |
| [SESSION_UNSPECIFIED] = 0, |
| [SESSION_TTY] = -2, |
| [SESSION_X11] = -3, |
| [SESSION_WAYLAND] = -3, |
| [SESSION_MIR] = -3, |
| [SESSION_WEB] = -1, |
| }; |
| |
| /* Calculate the partial order relationship between s1 and s2, |
| * returning < 0 if s1 is preferred as the user’s ‘primary session’, |
| * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2 |
| * is preferred. |
| * |
| * s1 or s2 may be NULL. */ |
| if (!s1 && !s2) |
| return 0; |
| |
| if ((s1 == NULL) != (s2 == NULL)) |
| return (s1 == NULL) - (s2 == NULL); |
| |
| if (s1->stopping != s2->stopping) |
| return s1->stopping - s2->stopping; |
| |
| if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER)) |
| return (s1->class != SESSION_USER) - (s2->class != SESSION_USER); |
| |
| if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID)) |
| return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID); |
| |
| if (s1->type != s2->type) |
| return type_ranks[s1->type] - type_ranks[s2->type]; |
| |
| return 0; |
| } |
| |
| void user_elect_display(User *u) { |
| Session *s; |
| |
| assert(u); |
| |
| /* This elects a primary session for each user, which we call |
| * the "display". We try to keep the assignment stable, but we |
| * "upgrade" to better choices. */ |
| log_debug("Electing new display for user %s", u->name); |
| |
| LIST_FOREACH(sessions_by_user, s, u->sessions) { |
| if (!elect_display_filter(s)) { |
| log_debug("Ignoring session %s", s->id); |
| continue; |
| } |
| |
| if (elect_display_compare(s, u->display) < 0) { |
| log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-"); |
| u->display = s; |
| } |
| } |
| } |
| |
| static const char* const user_state_table[_USER_STATE_MAX] = { |
| [USER_OFFLINE] = "offline", |
| [USER_OPENING] = "opening", |
| [USER_LINGERING] = "lingering", |
| [USER_ONLINE] = "online", |
| [USER_ACTIVE] = "active", |
| [USER_CLOSING] = "closing" |
| }; |
| |
| DEFINE_STRING_TABLE_LOOKUP(user_state, UserState); |
| |
| int config_parse_tmpfs_size( |
| const char* unit, |
| const char *filename, |
| unsigned line, |
| const char *section, |
| unsigned section_line, |
| const char *lvalue, |
| int ltype, |
| const char *rvalue, |
| void *data, |
| void *userdata) { |
| |
| size_t *sz = data; |
| const char *e; |
| int r; |
| |
| assert(filename); |
| assert(lvalue); |
| assert(rvalue); |
| assert(data); |
| |
| e = endswith(rvalue, "%"); |
| if (e) { |
| unsigned long ul; |
| char *f; |
| |
| errno = 0; |
| ul = strtoul(rvalue, &f, 10); |
| if (errno != 0 || f != e) { |
| log_syntax(unit, LOG_ERR, filename, line, errno, "Failed to parse percentage value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| if (ul <= 0 || ul >= 100) { |
| log_syntax(unit, LOG_ERR, filename, line, 0, "Percentage value out of range, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *sz = PAGE_ALIGN((size_t) ((physical_memory() * (uint64_t) ul) / (uint64_t) 100)); |
| } else { |
| uint64_t k; |
| |
| r = parse_size(rvalue, 1024, &k); |
| if (r < 0 || (uint64_t) (size_t) k != k) { |
| log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse size value, ignoring: %s", rvalue); |
| return 0; |
| } |
| |
| *sz = PAGE_ALIGN((size_t) k); |
| } |
| |
| return 0; |
| } |