diff options
Diffstat (limited to 'src/libsystemd/sd-login')
| -rw-r--r-- | src/libsystemd/sd-login/sd-login.c | 1044 | ||||
| -rw-r--r-- | src/libsystemd/sd-login/test-login.c | 302 |
2 files changed, 1346 insertions, 0 deletions
diff --git a/src/libsystemd/sd-login/sd-login.c b/src/libsystemd/sd-login/sd-login.c new file mode 100644 index 0000000..bf999e7 --- /dev/null +++ b/src/libsystemd/sd-login/sd-login.c @@ -0,0 +1,1044 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <errno.h> +#include <poll.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 "env-file.h" +#include "escape.h" +#include "extract-word.h" +#include "fd-util.h" +#include "format-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 "stdio-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) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(session, -EINVAL); + + r = cg_pid_get_session(pid, session); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_unit(pid_t pid, char **unit) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(unit, -EINVAL); + + r = cg_pid_get_unit(pid, unit); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_user_unit(pid_t pid, char **unit) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(unit, -EINVAL); + + r = cg_pid_get_user_unit(pid, unit); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_machine_name(pid_t pid, char **name) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(name, -EINVAL); + + r = cg_pid_get_machine_name(pid, name); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_slice(pid_t pid, char **slice) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(slice, -EINVAL); + + r = cg_pid_get_slice(pid, slice); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_user_slice(pid_t pid, char **slice) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(slice, -EINVAL); + + r = cg_pid_get_user_slice(pid, slice); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) { + int r; + + assert_return(pid >= 0, -EINVAL); + assert_return(uid, -EINVAL); + + r = cg_pid_get_owner_uid(pid, uid); + return IN_SET(r, -ENXIO, -ENOMEDIUM) ? -ENODATA : r; +} + +_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 = UCRED_INVALID; + 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, *s = NULL; + int r; + + assert_return(state, -EINVAL); + + r = file_of_uid(uid, &p); + if (r < 0) + return r; + + r = parse_env_file(NULL, p, "STATE", &s); + if (r == -ENOENT) + r = free_and_strdup(&s, "offline"); + if (r < 0) + return r; + if (isempty(s)) + return -EIO; + + *state = TAKE_PTR(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(NULL, p, "DISPLAY", &s); + if (r == -ENOENT) + return -ENODATA; + if (r < 0) + return r; + if (isempty(s)) + return -ENODATA; + + *session = TAKE_PTR(s); + + 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 = path_join("/run/systemd/seats", seat); + } else { + _cleanup_free_ char *buf = NULL; + + r = sd_session_get_seat(NULL, &buf); + if (r < 0) + return r; + + p = path_join("/run/systemd/seats", buf); + } + if (!p) + return -ENOMEM; + + *_p = TAKE_PTR(p); + return 0; +} + +_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) { + _cleanup_free_ char *filename = NULL, *content = NULL; + int r; + + assert_return(uid_is_valid(uid), -EINVAL); + + r = file_of_seat(seat, &filename); + if (r < 0) + return r; + + r = parse_env_file(NULL, filename, + require_active ? "ACTIVE_UID" : "UIDS", + &content); + if (r == -ENOENT) + return 0; + if (r < 0) + return r; + if (isempty(content)) + return 0; + + char t[DECIMAL_STR_MAX(uid_t)]; + xsprintf(t, UID_FMT, uid); + + return string_contains_word(content, NULL, t); +} + +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(NULL, p, variable, &s); + if (r == -ENOENT || (r >= 0 && isempty(s))) { + if (array) + *array = NULL; + return 0; + } + if (r < 0) + return r; + + a = strv_split(s, NULL); + if (!a) + return -ENOMEM; + + strv_uniq(a); + r = (int) 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 = path_join("/run/systemd/sessions", session); + } else { + _cleanup_free_ char *buf = NULL; + + r = sd_pid_get_session(0, &buf); + if (r < 0) + return r; + + p = path_join("/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(NULL, p, "ACTIVE", &s); + 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(NULL, p, "REMOTE", &s); + 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(NULL, p, "STATE", &s); + if (r == -ENOENT) + return -ENXIO; + if (r < 0) + return r; + if (isempty(s)) + return -EIO; + + *state = TAKE_PTR(s); + + 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(NULL, p, "UID", &s); + 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(NULL, p, field, &s); + if (r == -ENOENT) + return -ENXIO; + if (r < 0) + return r; + if (isempty(s)) + return -ENODATA; + + *value = TAKE_PTR(s); + 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; + int r; + ssize_t l; + + assert_return(desktop, -EINVAL); + + r = session_get_string(session, "DESKTOP", &escaped); + if (r < 0) + return r; + + l = cunescape(escaped, 0, desktop); + if (l < 0) + return l; + 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(NULL, p, + "ACTIVE", &s, + "ACTIVE_UID", &t); + 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 = TAKE_PTR(s); + + return 0; +} + +_public_ int sd_seat_get_sessions( + const char *seat, + char ***ret_sessions, + uid_t **ret_uids, + unsigned *ret_n_uids) { + + _cleanup_free_ char *fname = NULL, *session_line = NULL, *uid_line = NULL; + _cleanup_strv_free_ char **sessions = NULL; + _cleanup_free_ uid_t *uids = NULL; + unsigned n_sessions = 0; + int r; + + r = file_of_seat(seat, &fname); + if (r < 0) + return r; + + r = parse_env_file(NULL, fname, + "SESSIONS", &session_line, + "UIDS", &uid_line); + if (r == -ENOENT) + return -ENXIO; + if (r < 0) + return r; + + if (session_line) { + sessions = strv_split(session_line, NULL); + if (!sessions) + return -ENOMEM; + + n_sessions = strv_length(sessions); + }; + + if (ret_uids && uid_line) { + uids = new(uid_t, n_sessions); + if (!uids) + return -ENOMEM; + + size_t n = 0; + for (const char *p = uid_line;;) { + _cleanup_free_ char *word = NULL; + + r = extract_first_word(&p, &word, NULL, 0); + if (r < 0) + return r; + if (r == 0) + break; + + r = parse_uid(word, &uids[n++]); + if (r < 0) + return r; + } + + if (n != n_sessions) + return -EUCLEAN; + } + + if (ret_sessions) + *ret_sessions = TAKE_PTR(sessions); + if (ret_uids) + *ret_uids = TAKE_PTR(uids); + if (ret_n_uids) + *ret_n_uids = n_sessions; + + return n_sessions; +} + +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(NULL, p, + variable, &s); + 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 true; +} + +_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) { + int r; + + r = get_files_in_directory("/run/systemd/seats/", seats); + if (r == -ENOENT) { + if (seats) + *seats = NULL; + return 0; + } + return r; +} + +_public_ int sd_get_sessions(char ***sessions) { + int r; + + r = get_files_in_directory("/run/systemd/sessions/", sessions); + if (r == -ENOENT) { + if (sessions) + *sessions = NULL; + return 0; + } + return r; +} + +_public_ int sd_get_uids(uid_t **users) { + _cleanup_closedir_ DIR *d = NULL; + int r = 0; + unsigned n = 0; + _cleanup_free_ uid_t *l = NULL; + + d = opendir("/run/systemd/users/"); + if (!d) { + if (errno == ENOENT) { + if (users) + *users = NULL; + return 0; + } + return -errno; + } + + FOREACH_DIRENT_ALL(de, d, return -errno) { + int k; + uid_t uid; + + 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 = reallocarray(l, n, sizeof(uid_t)); + if (!t) + return -ENOMEM; + + l = t; + } + + assert((unsigned) r < n); + l[r++] = uid; + } else + r++; + } + + if (users) + *users = TAKE_PTR(l); + + return r; +} + +_public_ int sd_get_machine_names(char ***machines) { + _cleanup_strv_free_ char **l = NULL; + char **a, **b; + int r; + + r = get_files_in_directory("/run/systemd/machines/", &l); + if (r == -ENOENT) { + if (machines) + *machines = NULL; + return 0; + } + if (r < 0) + return r; + + if (l) { + r = 0; + + /* Filter out the unit: symlinks */ + for (a = b = l; *a; a++) { + if (startswith(*a, "unit:") || !hostname_is_valid(*a, 0)) + free(*a); + else { + *b = *a; + b++; + r++; + } + } + + *b = NULL; + } + + if (machines) + *machines = TAKE_PTR(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(class, -EINVAL); + + if (streq(machine, ".host")) { + c = strdup("host"); + if (!c) + return -ENOMEM; + } else { + if (!hostname_is_valid(machine, 0)) + return -EINVAL; + + p = strjoina("/run/systemd/machines/", machine); + r = parse_env_file(NULL, p, "CLASS", &c); + if (r == -ENOENT) + return -ENXIO; + if (r < 0) + return r; + if (!c) + return -EIO; + } + + *class = TAKE_PTR(c); + return 0; +} + +_public_ int sd_machine_get_ifindices(const char *machine, int **ret_ifindices) { + _cleanup_free_ char *netif_line = NULL; + const char *p; + int r; + + assert_return(hostname_is_valid(machine, 0), -EINVAL); + + p = strjoina("/run/systemd/machines/", machine); + r = parse_env_file(NULL, p, "NETIF", &netif_line); + if (r == -ENOENT) + return -ENXIO; + if (r < 0) + return r; + if (!netif_line) { + *ret_ifindices = NULL; + return 0; + } + + _cleanup_strv_free_ char **tt = strv_split(netif_line, NULL); + if (!tt) + return -ENOMEM; + + _cleanup_free_ int *ifindices = NULL; + if (ret_ifindices) { + ifindices = new(int, strv_length(tt)); + if (!ifindices) + return -ENOMEM; + } + + size_t n = 0; + for (size_t i = 0; tt[i]; i++) { + int ind; + + ind = parse_ifindex(tt[i]); + if (ind < 0) + /* Return -EUCLEAN to distinguish from -EINVAL for invalid args */ + return ind == -EINVAL ? -EUCLEAN : ind; + + if (ret_ifindices) + ifindices[n] = ind; + n++; + } + + if (ret_ifindices) + *ret_ifindices = TAKE_PTR(ifindices); + + return n; +} + +static int MONITOR_TO_FD(sd_login_monitor *m) { + return (int) (unsigned long) m - 1; +} + +static 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) { + _cleanup_close_ int fd = -1; + bool good = false; + int k; + + 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) + 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) + 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) + 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) + return -errno; + + good = true; + } + + if (!good) + return -EINVAL; + + *m = FD_TO_MONITOR(TAKE_FD(fd)); + return 0; +} + +_public_ sd_login_monitor* sd_login_monitor_unref(sd_login_monitor *m) { + if (m) + (void) close_nointr(MONITOR_TO_FD(m)); + + return NULL; +} + +_public_ int sd_login_monitor_flush(sd_login_monitor *m) { + int r; + + assert_return(m, -EINVAL); + + r = flush_fd(MONITOR_TO_FD(m)); + if (r < 0) + return r; + + return 0; +} + +_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_MAX, 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_MAX; + return 0; +} diff --git a/src/libsystemd/sd-login/test-login.c b/src/libsystemd/sd-login/test-login.c new file mode 100644 index 0000000..f7cef6e --- /dev/null +++ b/src/libsystemd/sd-login/test-login.c @@ -0,0 +1,302 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ + +#include <poll.h> + +#include "sd-login.h" + +#include "alloc-util.h" +#include "errno-list.h" +#include "fd-util.h" +#include "format-util.h" +#include "log.h" +#include "string-util.h" +#include "strv.h" +#include "tests.h" +#include "time-util.h" +#include "user-util.h" + +static char* format_uids(char **buf, uid_t* uids, int count) { + int pos = 0, inc; + size_t size = (DECIMAL_STR_MAX(uid_t) + 1) * count + 1; + + assert_se(*buf = malloc(size)); + + for (int k = 0; k < count; k++) { + sprintf(*buf + pos, "%s"UID_FMT"%n", k > 0 ? " " : "", uids[k], &inc); + pos += inc; + } + + assert_se(pos < (ssize_t)size); + (*buf)[pos] = '\0'; + + return *buf; +} + +static const char *e(int r) { + return r == 0 ? "OK" : errno_to_name(r); +} + +TEST(login) { + _cleanup_close_pair_ int pair[2] = { -1, -1 }; + _cleanup_free_ char *pp = NULL, *qq = NULL, + *display_session = NULL, *cgroup = NULL, + *display = NULL, *remote_user = NULL, *remote_host = NULL, + *type = NULL, *class = NULL, *state = NULL, *state2 = NULL, + *seat = NULL, *session = NULL, + *unit = NULL, *user_unit = NULL, *slice = NULL; + int r; + uid_t u, u2 = UID_INVALID; + char *t, **seats = NULL, **sessions = NULL; + + r = sd_pid_get_unit(0, &unit); + log_info("sd_pid_get_unit(0, …) → %s / \"%s\"", e(r), strnull(unit)); + assert_se(IN_SET(r, 0, -ENODATA)); + + r = sd_pid_get_user_unit(0, &user_unit); + log_info("sd_pid_get_user_unit(0, …) → %s / \"%s\"", e(r), strnull(user_unit)); + assert_se(IN_SET(r, 0, -ENODATA)); + + r = sd_pid_get_slice(0, &slice); + log_info("sd_pid_get_slice(0, …) → %s / \"%s\"", e(r), strnull(slice)); + assert_se(IN_SET(r, 0, -ENODATA)); + + r = sd_pid_get_owner_uid(0, &u2); + log_info("sd_pid_get_owner_uid(0, …) → %s / "UID_FMT, e(r), u2); + assert_se(IN_SET(r, 0, -ENODATA)); + + r = sd_pid_get_session(0, &session); + log_info("sd_pid_get_session(0, …) → %s / \"%s\"", e(r), strnull(session)); + + r = sd_pid_get_cgroup(0, &cgroup); + log_info("sd_pid_get_cgroup(0, …) → %s / \"%s\"", e(r), strnull(cgroup)); + assert_se(IN_SET(r, 0, -ENOMEDIUM)); + + r = sd_uid_get_display(u2, &display_session); + log_info("sd_uid_get_display("UID_FMT", …) → %s / \"%s\"", u2, e(r), strnull(display_session)); + if (u2 == UID_INVALID) + assert_se(r == -EINVAL); + else + assert_se(IN_SET(r, 0, -ENODATA)); + + assert_se(socketpair(AF_UNIX, SOCK_STREAM, 0, pair) == 0); + sd_peer_get_session(pair[0], &pp); + sd_peer_get_session(pair[1], &qq); + assert_se(streq_ptr(pp, qq)); + + r = sd_uid_get_sessions(u2, false, &sessions); + assert_se(t = strv_join(sessions, " ")); + log_info("sd_uid_get_sessions("UID_FMT", …) → %s \"%s\"", u2, e(r), t); + if (u2 == UID_INVALID) + assert_se(r == -EINVAL); + else { + assert_se(r >= 0); + assert_se(r == (int) strv_length(sessions)); + } + sessions = strv_free(sessions); + free(t); + + assert_se(r == sd_uid_get_sessions(u2, false, NULL)); + + r = sd_uid_get_seats(u2, false, &seats); + assert_se(t = strv_join(seats, " ")); + log_info("sd_uid_get_seats("UID_FMT", …) → %s \"%s\"", u2, e(r), t); + if (u2 == UID_INVALID) + assert_se(r == -EINVAL); + else { + assert_se(r >= 0); + assert_se(r == (int) strv_length(seats)); + } + seats = strv_free(seats); + free(t); + + assert_se(r == sd_uid_get_seats(u2, false, NULL)); + + if (session) { + r = sd_session_is_active(session); + if (r == -ENXIO) + log_notice("sd_session_is_active() failed with ENXIO, it seems logind is not running."); + else { + /* All those tests will fail with ENXIO, so let's skip them. */ + + assert_se(r >= 0); + log_info("sd_session_is_active(\"%s\") → %s", session, yes_no(r)); + + r = sd_session_is_remote(session); + assert_se(r >= 0); + log_info("sd_session_is_remote(\"%s\") → %s", session, yes_no(r)); + + r = sd_session_get_state(session, &state); + assert_se(r == 0); + log_info("sd_session_get_state(\"%s\") → \"%s\"", session, state); + + assert_se(sd_session_get_uid(session, &u) >= 0); + log_info("sd_session_get_uid(\"%s\") → "UID_FMT, session, u); + assert_se(u == u2); + + assert_se(sd_session_get_type(session, &type) >= 0); + log_info("sd_session_get_type(\"%s\") → \"%s\"", session, type); + + assert_se(sd_session_get_class(session, &class) >= 0); + log_info("sd_session_get_class(\"%s\") → \"%s\"", session, class); + + r = sd_session_get_display(session, &display); + assert_se(IN_SET(r, 0, -ENODATA)); + log_info("sd_session_get_display(\"%s\") → \"%s\"", session, strna(display)); + + r = sd_session_get_remote_user(session, &remote_user); + assert_se(IN_SET(r, 0, -ENODATA)); + log_info("sd_session_get_remote_user(\"%s\") → \"%s\"", + session, strna(remote_user)); + + r = sd_session_get_remote_host(session, &remote_host); + assert_se(IN_SET(r, 0, -ENODATA)); + log_info("sd_session_get_remote_host(\"%s\") → \"%s\"", + session, strna(remote_host)); + + r = sd_session_get_seat(session, &seat); + if (r >= 0) { + assert_se(seat); + + log_info("sd_session_get_seat(\"%s\") → \"%s\"", session, seat); + +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wdeprecated-declarations" + r = sd_seat_can_multi_session(seat); +#pragma GCC diagnostic pop + assert_se(r == 1); + log_info("sd_session_can_multi_seat(\"%s\") → %s", seat, yes_no(r)); + + r = sd_seat_can_tty(seat); + assert_se(r >= 0); + log_info("sd_session_can_tty(\"%s\") → %s", seat, yes_no(r)); + + r = sd_seat_can_graphical(seat); + assert_se(r >= 0); + log_info("sd_session_can_graphical(\"%s\") → %s", seat, yes_no(r)); + } else { + log_info_errno(r, "sd_session_get_seat(\"%s\"): %m", session); + assert_se(r == -ENODATA); + } + + assert_se(sd_uid_get_state(u, &state2) == 0); + log_info("sd_uid_get_state("UID_FMT", …) → %s", u, state2); + } + } + + if (seat) { + _cleanup_free_ char *session2 = NULL, *buf = NULL; + _cleanup_free_ uid_t *uids = NULL; + unsigned n; + + assert_se(sd_uid_is_on_seat(u, 0, seat) > 0); + + r = sd_seat_get_active(seat, &session2, &u2); + assert_se(r == 0); + log_info("sd_seat_get_active(\"%s\", …) → \"%s\", "UID_FMT, seat, session2, u2); + + r = sd_uid_is_on_seat(u, 1, seat); + assert_se(IN_SET(r, 0, 1)); + assert_se(!!r == streq(session, session2)); + + r = sd_seat_get_sessions(seat, &sessions, &uids, &n); + assert_se(r >= 0); + assert_se(r == (int) strv_length(sessions)); + assert_se(t = strv_join(sessions, " ")); + strv_free(sessions); + log_info("sd_seat_get_sessions(\"%s\", …) → %s, \"%s\", [%u] {%s}", + seat, e(r), t, n, format_uids(&buf, uids, n)); + free(t); + + assert_se(sd_seat_get_sessions(seat, NULL, NULL, NULL) == r); + } + + r = sd_get_seats(&seats); + assert_se(r >= 0); + assert_se(r == (int) strv_length(seats)); + assert_se(t = strv_join(seats, ", ")); + strv_free(seats); + log_info("sd_get_seats(…) → [%i] \"%s\"", r, t); + t = mfree(t); + + assert_se(sd_get_seats(NULL) == r); + + r = sd_seat_get_active(NULL, &t, NULL); + assert_se(IN_SET(r, 0, -ENODATA, -ENXIO)); + log_info("sd_seat_get_active(NULL, …) (active session on current seat) → %s / \"%s\"", e(r), strnull(t)); + free(t); + + r = sd_get_sessions(&sessions); + assert_se(r >= 0); + assert_se(r == (int) strv_length(sessions)); + assert_se(t = strv_join(sessions, ", ")); + strv_free(sessions); + log_info("sd_get_sessions(…) → [%i] \"%s\"", r, t); + free(t); + + assert_se(sd_get_sessions(NULL) == r); + + { + _cleanup_free_ uid_t *uids = NULL; + _cleanup_free_ char *buf = NULL; + + r = sd_get_uids(&uids); + assert_se(r >= 0); + log_info("sd_get_uids(…) → [%i] {%s}", r, format_uids(&buf, uids, r)); + + assert_se(sd_get_uids(NULL) == r); + } + + { + _cleanup_strv_free_ char **machines = NULL; + _cleanup_free_ char *buf = NULL; + + r = sd_get_machine_names(&machines); + assert_se(r >= 0); + assert_se(r == (int) strv_length(machines)); + assert_se(buf = strv_join(machines, " ")); + log_info("sd_get_machines(…) → [%i] \"%s\"", r, buf); + + assert_se(sd_get_machine_names(NULL) == r); + } +} + +TEST(monitor) { + sd_login_monitor *m = NULL; + int r; + + if (!streq_ptr(saved_argv[1], "-m")) + return; + + assert_se(sd_login_monitor_new("session", &m) == 0); + + for (unsigned n = 0; n < 5; n++) { + struct pollfd pollfd = {}; + usec_t timeout, nw; + + assert_se((pollfd.fd = sd_login_monitor_get_fd(m)) >= 0); + assert_se((pollfd.events = sd_login_monitor_get_events(m)) >= 0); + + assert_se(sd_login_monitor_get_timeout(m, &timeout) >= 0); + + nw = now(CLOCK_MONOTONIC); + + r = poll(&pollfd, 1, + timeout == UINT64_MAX ? -1 : + timeout > nw ? (int) ((timeout - nw) / 1000) : + 0); + + assert_se(r >= 0); + + sd_login_monitor_flush(m); + printf("Wake!\n"); + } + + sd_login_monitor_unref(m); +} + +static int intro(void) { + log_info("/* Information printed is from the live system */"); + return EXIT_SUCCESS; +} + +DEFINE_TEST_MAIN_WITH_INTRO(LOG_INFO, intro); |