diff options
Diffstat (limited to 'src/libsystemd/sd-login/sd-login.c')
| -rw-r--r-- | src/libsystemd/sd-login/sd-login.c | 1062 |
1 files changed, 0 insertions, 1062 deletions
diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c deleted file mode 100644 index 3fcefada3f..0000000000 --- a/src/libsystemd/sd-login/sd-login.c +++ /dev/null @@ -1,1062 +0,0 @@ -/*** - 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 <poll.h> -#include <string.h> -#include <sys/inotify.h> -#include <unistd.h> - -#include "sd-login.h" - -#include "alloc-util.h" -#include "cgroup-util.h" -#include "dirent-util.h" -#include "escape.h" -#include "fd-util.h" -#include "fileio.h" -#include "formats-util.h" -#include "fs-util.h" -#include "hostname-util.h" -#include "io-util.h" -#include "login-util.h" -#include "macro.h" -#include "parse-util.h" -#include "path-util.h" -#include "socket-util.h" -#include "string-util.h" -#include "strv.h" -#include "user-util.h" -#include "util.h" - -/* Error codes: - * - * invalid input parameters → -EINVAL - * invalid fd → -EBADF - * process does not exist → -ESRCH - * cgroup does not exist → -ENOENT - * machine, session does not exist → -ENXIO - * requested metadata on object is missing → -ENODATA - */ - -_public_ int sd_pid_get_session(pid_t pid, char **session) { - - assert_return(pid >= 0, -EINVAL); - assert_return(session, -EINVAL); - - return cg_pid_get_session(pid, session); -} - -_public_ int sd_pid_get_unit(pid_t pid, char **unit) { - - assert_return(pid >= 0, -EINVAL); - assert_return(unit, -EINVAL); - - return cg_pid_get_unit(pid, unit); -} - -_public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { - - assert_return(pid >= 0, -EINVAL); - assert_return(unit, -EINVAL); - - return cg_pid_get_user_unit(pid, unit); -} - -_public_ int sd_pid_get_machine_name(pid_t pid, char **name) { - - assert_return(pid >= 0, -EINVAL); - assert_return(name, -EINVAL); - - return cg_pid_get_machine_name(pid, name); -} - -_public_ int sd_pid_get_slice(pid_t pid, char **slice) { - - assert_return(pid >= 0, -EINVAL); - assert_return(slice, -EINVAL); - - return cg_pid_get_slice(pid, slice); -} - -_public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { - - assert_return(pid >= 0, -EINVAL); - assert_return(slice, -EINVAL); - - return cg_pid_get_user_slice(pid, slice); -} - -_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { - - assert_return(pid >= 0, -EINVAL); - assert_return(uid, -EINVAL); - - return cg_pid_get_owner_uid(pid, uid); -} - -_public_ int sd_pid_get_cgroup(pid_t pid, char **cgroup) { - char *c; - int r; - - assert_return(pid >= 0, -EINVAL); - assert_return(cgroup, -EINVAL); - - r = cg_pid_get_path(SYSTEMD_CGROUP_CONTROLLER, pid, &c); - if (r < 0) - return r; - - /* The internal APIs return the empty string for the root - * cgroup, let's return the "/" in the public APIs instead, as - * that's easier and less ambiguous for people to grok. */ - if (isempty(c)) { - free(c); - c = strdup("/"); - if (!c) - return -ENOMEM; - - } - - *cgroup = c; - return 0; -} - -_public_ int sd_peer_get_session(int fd, char **session) { - struct ucred ucred = {}; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(session, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_session(ucred.pid, session); -} - -_public_ int sd_peer_get_owner_uid(int fd, uid_t *uid) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(uid, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_owner_uid(ucred.pid, uid); -} - -_public_ int sd_peer_get_unit(int fd, char **unit) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(unit, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_unit(ucred.pid, unit); -} - -_public_ int sd_peer_get_user_unit(int fd, char **unit) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(unit, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_user_unit(ucred.pid, unit); -} - -_public_ int sd_peer_get_machine_name(int fd, char **machine) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(machine, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_machine_name(ucred.pid, machine); -} - -_public_ int sd_peer_get_slice(int fd, char **slice) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(slice, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_slice(ucred.pid, slice); -} - -_public_ int sd_peer_get_user_slice(int fd, char **slice) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(slice, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return cg_pid_get_user_slice(ucred.pid, slice); -} - -_public_ int sd_peer_get_cgroup(int fd, char **cgroup) { - struct ucred ucred; - int r; - - assert_return(fd >= 0, -EBADF); - assert_return(cgroup, -EINVAL); - - r = getpeercred(fd, &ucred); - if (r < 0) - return r; - - return sd_pid_get_cgroup(ucred.pid, cgroup); -} - -static int file_of_uid(uid_t uid, char **p) { - - assert_return(uid_is_valid(uid), -EINVAL); - assert(p); - - if (asprintf(p, "/run/systemd/users/" UID_FMT, uid) < 0) - return -ENOMEM; - - return 0; -} - -_public_ int sd_uid_get_state(uid_t uid, char**state) { - _cleanup_free_ char *p = NULL; - char *s = NULL; - int r; - - assert_return(state, -EINVAL); - - r = file_of_uid(uid, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); - if (r == -ENOENT) { - free(s); - s = strdup("offline"); - if (!s) - return -ENOMEM; - - } - if (r < 0) { - free(s); - return r; - } - if (isempty(s)) { - free(s); - return -EIO; - } - - *state = s; - return 0; -} - -_public_ int sd_uid_get_display(uid_t uid, char **session) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - assert_return(session, -EINVAL); - - r = file_of_uid(uid, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "DISPLAY", &s, NULL); - if (r == -ENOENT) - return -ENODATA; - if (r < 0) - return r; - if (isempty(s)) - return -ENODATA; - - *session = s; - s = NULL; - - return 0; -} - -static int file_of_seat(const char *seat, char **_p) { - char *p; - int r; - - assert(_p); - - if (seat) { - if (!filename_is_valid(seat)) - return -EINVAL; - - p = strappend("/run/systemd/seats/", seat); - } else { - _cleanup_free_ char *buf = NULL; - - r = sd_session_get_seat(NULL, &buf); - if (r < 0) - return r; - - p = strappend("/run/systemd/seats/", buf); - } - - if (!p) - return -ENOMEM; - - *_p = p; - p = NULL; - return 0; -} - -_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) { - _cleanup_free_ char *t = NULL, *s = NULL, *p = NULL; - size_t l; - int r; - const char *word, *variable, *state; - - assert_return(uid_is_valid(uid), -EINVAL); - - r = file_of_seat(seat, &p); - if (r < 0) - return r; - - variable = require_active ? "ACTIVE_UID" : "UIDS"; - - r = parse_env_file(p, NEWLINE, variable, &s, NULL); - if (r == -ENOENT) - return 0; - if (r < 0) - return r; - if (isempty(s)) - return 0; - - if (asprintf(&t, UID_FMT, uid) < 0) - return -ENOMEM; - - FOREACH_WORD(word, l, s, state) - if (strneq(t, word, l)) - return 1; - - return 0; -} - -static int uid_get_array(uid_t uid, const char *variable, char ***array) { - _cleanup_free_ char *p = NULL, *s = NULL; - char **a; - int r; - - assert(variable); - - r = file_of_uid(uid, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, variable, &s, NULL); - if (r == -ENOENT || (r >= 0 && isempty(s))) { - if (array) - *array = NULL; - return 0; - } - if (r < 0) - return r; - - a = strv_split(s, " "); - if (!a) - return -ENOMEM; - - strv_uniq(a); - r = strv_length(a); - - if (array) - *array = a; - else - strv_free(a); - - return r; -} - -_public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) { - return uid_get_array( - uid, - require_active == 0 ? "ONLINE_SESSIONS" : - require_active > 0 ? "ACTIVE_SESSIONS" : - "SESSIONS", - sessions); -} - -_public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) { - return uid_get_array( - uid, - require_active == 0 ? "ONLINE_SEATS" : - require_active > 0 ? "ACTIVE_SEATS" : - "SEATS", - seats); -} - -static int file_of_session(const char *session, char **_p) { - char *p; - int r; - - assert(_p); - - if (session) { - if (!session_id_valid(session)) - return -EINVAL; - - p = strappend("/run/systemd/sessions/", session); - } else { - _cleanup_free_ char *buf = NULL; - - r = sd_pid_get_session(0, &buf); - if (r < 0) - return r; - - p = strappend("/run/systemd/sessions/", buf); - } - - if (!p) - return -ENOMEM; - - *_p = p; - return 0; -} - -_public_ int sd_session_is_active(const char *session) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - r = file_of_session(session, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "ACTIVE", &s, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -EIO; - - return parse_boolean(s); -} - -_public_ int sd_session_is_remote(const char *session) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - r = file_of_session(session, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "REMOTE", &s, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -ENODATA; - - return parse_boolean(s); -} - -_public_ int sd_session_get_state(const char *session, char **state) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - assert_return(state, -EINVAL); - - r = file_of_session(session, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "STATE", &s, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -EIO; - - *state = s; - s = NULL; - - return 0; -} - -_public_ int sd_session_get_uid(const char *session, uid_t *uid) { - int r; - _cleanup_free_ char *p = NULL, *s = NULL; - - assert_return(uid, -EINVAL); - - r = file_of_session(session, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, "UID", &s, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -EIO; - - return parse_uid(s, uid); -} - -static int session_get_string(const char *session, const char *field, char **value) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - assert_return(value, -EINVAL); - assert(field); - - r = file_of_session(session, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, field, &s, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -ENODATA; - - *value = s; - s = NULL; - return 0; -} - -_public_ int sd_session_get_seat(const char *session, char **seat) { - return session_get_string(session, "SEAT", seat); -} - -_public_ int sd_session_get_tty(const char *session, char **tty) { - return session_get_string(session, "TTY", tty); -} - -_public_ int sd_session_get_vt(const char *session, unsigned *vtnr) { - _cleanup_free_ char *vtnr_string = NULL; - unsigned u; - int r; - - assert_return(vtnr, -EINVAL); - - r = session_get_string(session, "VTNR", &vtnr_string); - if (r < 0) - return r; - - r = safe_atou(vtnr_string, &u); - if (r < 0) - return r; - - *vtnr = u; - return 0; -} - -_public_ int sd_session_get_service(const char *session, char **service) { - return session_get_string(session, "SERVICE", service); -} - -_public_ int sd_session_get_type(const char *session, char **type) { - return session_get_string(session, "TYPE", type); -} - -_public_ int sd_session_get_class(const char *session, char **class) { - return session_get_string(session, "CLASS", class); -} - -_public_ int sd_session_get_desktop(const char *session, char **desktop) { - _cleanup_free_ char *escaped = NULL; - char *t; - int r; - - assert_return(desktop, -EINVAL); - - r = session_get_string(session, "DESKTOP", &escaped); - if (r < 0) - return r; - - r = cunescape(escaped, 0, &t); - if (r < 0) - return r; - - *desktop = t; - return 0; -} - -_public_ int sd_session_get_display(const char *session, char **display) { - return session_get_string(session, "DISPLAY", display); -} - -_public_ int sd_session_get_remote_user(const char *session, char **remote_user) { - return session_get_string(session, "REMOTE_USER", remote_user); -} - -_public_ int sd_session_get_remote_host(const char *session, char **remote_host) { - return session_get_string(session, "REMOTE_HOST", remote_host); -} - -_public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) { - _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; - int r; - - assert_return(session || uid, -EINVAL); - - r = file_of_seat(seat, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, - "ACTIVE", &s, - "ACTIVE_UID", &t, - NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - - if (session && !s) - return -ENODATA; - - if (uid && !t) - return -ENODATA; - - if (uid && t) { - r = parse_uid(t, uid); - if (r < 0) - return r; - } - - if (session && s) { - *session = s; - s = NULL; - } - - return 0; -} - -_public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) { - _cleanup_free_ char *p = NULL, *s = NULL, *t = NULL; - _cleanup_strv_free_ char **a = NULL; - _cleanup_free_ uid_t *b = NULL; - unsigned n = 0; - int r; - - r = file_of_seat(seat, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, - "SESSIONS", &s, - "ACTIVE_SESSIONS", &t, - NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - - if (s) { - a = strv_split(s, " "); - if (!a) - return -ENOMEM; - } - - if (uids && t) { - const char *word, *state; - size_t l; - - FOREACH_WORD(word, l, t, state) - n++; - - if (n > 0) { - unsigned i = 0; - - b = new(uid_t, n); - if (!b) - return -ENOMEM; - - FOREACH_WORD(word, l, t, state) { - _cleanup_free_ char *k = NULL; - - k = strndup(word, l); - if (!k) - return -ENOMEM; - - r = parse_uid(k, b + i); - if (r < 0) - continue; - - i++; - } - } - } - - r = strv_length(a); - - if (sessions) { - *sessions = a; - a = NULL; - } - - if (uids) { - *uids = b; - b = NULL; - } - - if (n_uids) - *n_uids = n; - - return r; -} - -static int seat_get_can(const char *seat, const char *variable) { - _cleanup_free_ char *p = NULL, *s = NULL; - int r; - - assert(variable); - - r = file_of_seat(seat, &p); - if (r < 0) - return r; - - r = parse_env_file(p, NEWLINE, - variable, &s, - NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (isempty(s)) - return -ENODATA; - - return parse_boolean(s); -} - -_public_ int sd_seat_can_multi_session(const char *seat) { - return seat_get_can(seat, "CAN_MULTI_SESSION"); -} - -_public_ int sd_seat_can_tty(const char *seat) { - return seat_get_can(seat, "CAN_TTY"); -} - -_public_ int sd_seat_can_graphical(const char *seat) { - return seat_get_can(seat, "CAN_GRAPHICAL"); -} - -_public_ int sd_get_seats(char ***seats) { - return get_files_in_directory("/run/systemd/seats/", seats); -} - -_public_ int sd_get_sessions(char ***sessions) { - return get_files_in_directory("/run/systemd/sessions/", sessions); -} - -_public_ int sd_get_uids(uid_t **users) { - _cleanup_closedir_ DIR *d; - int r = 0; - unsigned n = 0; - _cleanup_free_ uid_t *l = NULL; - - d = opendir("/run/systemd/users/"); - if (!d) - return -errno; - - for (;;) { - struct dirent *de; - int k; - uid_t uid; - - errno = 0; - de = readdir(d); - if (!de && errno > 0) - return -errno; - - if (!de) - break; - - dirent_ensure_type(d, de); - - if (!dirent_is_file(de)) - continue; - - k = parse_uid(de->d_name, &uid); - if (k < 0) - continue; - - if (users) { - if ((unsigned) r >= n) { - uid_t *t; - - n = MAX(16, 2*r); - t = realloc(l, sizeof(uid_t) * n); - if (!t) - return -ENOMEM; - - l = t; - } - - assert((unsigned) r < n); - l[r++] = uid; - } else - r++; - } - - if (users) { - *users = l; - l = NULL; - } - - return r; -} - -_public_ int sd_get_machine_names(char ***machines) { - char **l = NULL, **a, **b; - int r; - - assert_return(machines, -EINVAL); - - r = get_files_in_directory("/run/systemd/machines/", &l); - if (r < 0) - return r; - - if (l) { - r = 0; - - /* Filter out the unit: symlinks */ - for (a = l, b = l; *a; a++) { - if (startswith(*a, "unit:") || !machine_name_is_valid(*a)) - free(*a); - else { - *b = *a; - b++; - r++; - } - } - - *b = NULL; - } - - *machines = l; - return r; -} - -_public_ int sd_machine_get_class(const char *machine, char **class) { - _cleanup_free_ char *c = NULL; - const char *p; - int r; - - assert_return(machine_name_is_valid(machine), -EINVAL); - assert_return(class, -EINVAL); - - p = strjoina("/run/systemd/machines/", machine); - r = parse_env_file(p, NEWLINE, "CLASS", &c, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (!c) - return -EIO; - - *class = c; - c = NULL; - - return 0; -} - -_public_ int sd_machine_get_ifindices(const char *machine, int **ifindices) { - _cleanup_free_ char *netif = NULL; - size_t l, allocated = 0, nr = 0; - int *ni = NULL; - const char *p, *word, *state; - int r; - - assert_return(machine_name_is_valid(machine), -EINVAL); - assert_return(ifindices, -EINVAL); - - p = strjoina("/run/systemd/machines/", machine); - r = parse_env_file(p, NEWLINE, "NETIF", &netif, NULL); - if (r == -ENOENT) - return -ENXIO; - if (r < 0) - return r; - if (!netif) { - *ifindices = NULL; - return 0; - } - - FOREACH_WORD(word, l, netif, state) { - char buf[l+1]; - int ifi; - - *(char*) (mempcpy(buf, word, l)) = 0; - - if (parse_ifindex(buf, &ifi) < 0) - continue; - - if (!GREEDY_REALLOC(ni, allocated, nr+1)) { - free(ni); - return -ENOMEM; - } - - ni[nr++] = ifi; - } - - *ifindices = ni; - return nr; -} - -static inline int MONITOR_TO_FD(sd_login_monitor *m) { - return (int) (unsigned long) m - 1; -} - -static inline sd_login_monitor* FD_TO_MONITOR(int fd) { - return (sd_login_monitor*) (unsigned long) (fd + 1); -} - -_public_ int sd_login_monitor_new(const char *category, sd_login_monitor **m) { - int fd, k; - bool good = false; - - assert_return(m, -EINVAL); - - fd = inotify_init1(IN_NONBLOCK|IN_CLOEXEC); - if (fd < 0) - return -errno; - - if (!category || streq(category, "seat")) { - k = inotify_add_watch(fd, "/run/systemd/seats/", IN_MOVED_TO|IN_DELETE); - if (k < 0) { - safe_close(fd); - return -errno; - } - - good = true; - } - - if (!category || streq(category, "session")) { - k = inotify_add_watch(fd, "/run/systemd/sessions/", IN_MOVED_TO|IN_DELETE); - if (k < 0) { - safe_close(fd); - return -errno; - } - - good = true; - } - - if (!category || streq(category, "uid")) { - k = inotify_add_watch(fd, "/run/systemd/users/", IN_MOVED_TO|IN_DELETE); - if (k < 0) { - safe_close(fd); - return -errno; - } - - good = true; - } - - if (!category || streq(category, "machine")) { - k = inotify_add_watch(fd, "/run/systemd/machines/", IN_MOVED_TO|IN_DELETE); - if (k < 0) { - safe_close(fd); - return -errno; - } - - good = true; - } - - if (!good) { - close_nointr(fd); - return -EINVAL; - } - - *m = FD_TO_MONITOR(fd); - return 0; -} - -_public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { - int fd; - - if (!m) - return NULL; - - fd = MONITOR_TO_FD(m); - close_nointr(fd); - - return NULL; -} - -_public_ int sd_login_monitor_flush(sd_login_monitor *m) { - - assert_return(m, -EINVAL); - - return flush_fd(MONITOR_TO_FD(m)); -} - -_public_ int sd_login_monitor_get_fd(sd_login_monitor *m) { - - assert_return(m, -EINVAL); - - return MONITOR_TO_FD(m); -} - -_public_ int sd_login_monitor_get_events(sd_login_monitor *m) { - - assert_return(m, -EINVAL); - - /* For now we will only return POLLIN here, since we don't - * need anything else ever for inotify. However, let's have - * this API to keep our options open should we later on need - * it. */ - return POLLIN; -} - -_public_ int sd_login_monitor_get_timeout(sd_login_monitor *m, uint64_t *timeout_usec) { - - assert_return(m, -EINVAL); - assert_return(timeout_usec, -EINVAL); - - /* For now we will only return (uint64_t) -1, since we don't - * need any timeout. However, let's have this API to keep our - * options open should we later on need it. */ - *timeout_usec = (uint64_t) -1; - return 0; -} |