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Diffstat (limited to 'src/sd-login.c')
-rw-r--r--src/sd-login.c422
1 files changed, 396 insertions, 26 deletions
diff --git a/src/sd-login.c b/src/sd-login.c
index 3ae850d801..6dfc2d086e 100644
--- a/src/sd-login.c
+++ b/src/sd-login.c
@@ -22,15 +22,17 @@
#include <unistd.h>
#include <string.h>
#include <errno.h>
+#include <sys/inotify.h>
#include "util.h"
#include "cgroup-util.h"
#include "macro.h"
#include "sd-login.h"
+#include "strv.h"
-_public_ int sd_pid_get_session(pid_t pid, char **session) {
- int r;
+static int pid_get_cgroup(pid_t pid, char **root, char **cgroup) {
char *cg_process, *cg_init, *p;
+ int r;
if (pid == 0)
pid = getpid();
@@ -38,9 +40,6 @@ _public_ int sd_pid_get_session(pid_t pid, char **session) {
if (pid <= 0)
return -EINVAL;
- if (!session)
- return -EINVAL;
-
r = cg_get_by_pid(SYSTEMD_CGROUP_CONTROLLER, pid, &cg_process);
if (r < 0)
return r;
@@ -63,26 +62,57 @@ _public_ int sd_pid_get_session(pid_t pid, char **session) {
free(cg_init);
- if (!startswith(p, "/user/")) {
- free(cg_process);
- return -ENOENT;
+ if (cgroup) {
+ char* c;
+
+ c = strdup(p);
+ if (!c) {
+ free(cg_process);
+ return -ENOMEM;
+ }
+
+ *cgroup = c;
}
- p += 6;
- if (startswith(p, "shared/") || streq(p, "shared")) {
+ if (root) {
+ cg_process[p-cg_process] = 0;
+ *root = cg_process;
+ } else
free(cg_process);
+
+ return 0;
+}
+
+_public_ int sd_pid_get_session(pid_t pid, char **session) {
+ int r;
+ char *cgroup, *p;
+
+ if (!session)
+ return -EINVAL;
+
+ r = pid_get_cgroup(pid, NULL, &cgroup);
+ if (r < 0)
+ return r;
+
+ if (!startswith(cgroup, "/user/")) {
+ free(cgroup);
return -ENOENT;
}
- p = strchr(p, '/');
+ p = strchr(cgroup + 6, '/');
if (!p) {
- free(cg_process);
+ free(cgroup);
return -ENOENT;
}
p++;
+ if (startswith(p, "shared/") || streq(p, "shared")) {
+ free(cgroup);
+ return -ENOENT;
+ }
+
p = strndup(p, strcspn(p, "/"));
- free(cg_process);
+ free(cgroup);
if (!p)
return -ENOMEM;
@@ -91,6 +121,54 @@ _public_ int sd_pid_get_session(pid_t pid, char **session) {
return 0;
}
+_public_ int sd_pid_get_owner_uid(pid_t pid, uid_t *uid) {
+ int r;
+ char *root, *cgroup, *p, *cc;
+ struct stat st;
+
+ if (!uid)
+ return -EINVAL;
+
+ r = pid_get_cgroup(pid, &root, &cgroup);
+ if (r < 0)
+ return r;
+
+ if (!startswith(cgroup, "/user/")) {
+ free(cgroup);
+ free(root);
+ return -ENOENT;
+ }
+
+ p = strchr(cgroup + 6, '/');
+ if (!p) {
+ free(cgroup);
+ return -ENOENT;
+ }
+
+ p++;
+ p += strcspn(p, "/");
+ *p = 0;
+
+ r = cg_get_path(SYSTEMD_CGROUP_CONTROLLER, root, cgroup, &cc);
+ free(root);
+ free(cgroup);
+
+ if (r < 0)
+ return -ENOMEM;
+
+ r = lstat(cc, &st);
+ free(cc);
+
+ if (r < 0)
+ return -errno;
+
+ if (!S_ISDIR(st.st_mode))
+ return -ENOTDIR;
+
+ *uid = st.st_uid;
+ return 0;
+}
+
_public_ int sd_uid_get_state(uid_t uid, char**state) {
char *p, *s = NULL;
int r;
@@ -122,19 +200,22 @@ _public_ int sd_uid_get_state(uid_t uid, char**state) {
return 0;
}
-static int uid_is_on_seat_internal(uid_t uid, const char *seat, const char *variable) {
+_public_ int sd_uid_is_on_seat(uid_t uid, int require_active, const char *seat) {
char *p, *w, *t, *state, *s = NULL;
size_t l;
int r;
+ const char *variable;
if (!seat)
return -EINVAL;
+ variable = require_active ? "ACTIVE_UID" : "UIDS";
+
p = strappend("/run/systemd/seats/", seat);
if (!p)
return -ENOMEM;
- r = parse_env_file(p, NEWLINE, "UIDS", &s, NULL);
+ r = parse_env_file(p, NEWLINE, variable, &s, NULL);
free(p);
if (r < 0) {
@@ -165,12 +246,54 @@ static int uid_is_on_seat_internal(uid_t uid, const char *seat, const char *vari
return 0;
}
-_public_ int sd_uid_is_on_seat(uid_t uid, const char *seat) {
- return uid_is_on_seat_internal(uid, seat, "UIDS");
+static int uid_get_array(uid_t uid, const char *variable, char ***array) {
+ char *p, *s = NULL;
+ char **a;
+ int r;
+
+ if (!array)
+ return -EINVAL;
+
+ if (asprintf(&p, "/run/systemd/users/%lu", (unsigned long) uid) < 0)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE,
+ variable, &s,
+ NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+
+ if (r == -ENOENT) {
+ *array = NULL;
+ return 0;
+ }
+
+ return r;
+ }
+
+ if (!s) {
+ *array = NULL;
+ return 0;
+ }
+
+ a = strv_split(s, " ");
+ free(s);
+
+ if (!a)
+ return -ENOMEM;
+
+ *array = a;
+ return 0;
+}
+
+_public_ int sd_uid_get_sessions(uid_t uid, int require_active, char ***sessions) {
+ return uid_get_array(uid, require_active ? "ACTIVE_SESSIONS" : "SESSIONS", sessions);
}
-_public_ int sd_uid_is_active_on_seat(uid_t uid, const char *seat) {
- return uid_is_on_seat_internal(uid, seat, "ACTIVE_UID");
+_public_ int sd_uid_get_seats(uid_t uid, int require_active, char ***seats) {
+ return uid_get_array(uid, require_active ? "ACTIVE_SEATS" : "SEATS", seats);
}
_public_ int sd_session_is_active(const char *session) {
@@ -291,25 +414,21 @@ _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
if (session && !s) {
free(t);
- return -EIO;
+ return -ENOENT;
}
if (uid && !t) {
free(s);
- return -EIO;
+ return -ENOENT;
}
if (uid && t) {
- unsigned long ul;
-
- r = safe_atolu(t, &ul);
+ r = parse_uid(t, uid);
if (r < 0) {
free(t);
free(s);
return r;
}
-
- *uid = (uid_t) ul;
}
free(t);
@@ -321,3 +440,254 @@ _public_ int sd_seat_get_active(const char *seat, char **session, uid_t *uid) {
return 0;
}
+
+_public_ int sd_seat_get_sessions(const char *seat, char ***sessions, uid_t **uids, unsigned *n_uids) {
+ char *p, *s = NULL, *t = NULL, **a = NULL;
+ uid_t *b = NULL;
+ unsigned n = 0;
+ int r;
+
+ if (!seat)
+ return -EINVAL;
+
+ if (!sessions && !uids)
+ return -EINVAL;
+
+ p = strappend("/run/systemd/seats/", seat);
+ if (!p)
+ return -ENOMEM;
+
+ r = parse_env_file(p, NEWLINE,
+ "SESSIONS", &s,
+ "ACTIVE_SESSIONS", &t,
+ NULL);
+ free(p);
+
+ if (r < 0) {
+ free(s);
+ free(t);
+ return r;
+ }
+
+ if (sessions && s) {
+ a = strv_split(s, " ");
+ if (!a) {
+ free(s);
+ free(t);
+ return -ENOMEM;
+ }
+ }
+
+ free(s);
+
+ if (uids && t) {
+ char *w, *state;
+ size_t l;
+ unsigned i = 0;
+
+ FOREACH_WORD(w, l, t, state)
+ n++;
+
+ b = new(uid_t, n);
+ if (!b) {
+ strv_free(a);
+ return -ENOMEM;
+ }
+
+ FOREACH_WORD(w, l, t, state) {
+ char *k;
+
+ k = strndup(w, l);
+ if (!k) {
+ free(t);
+ free(b);
+ return -ENOMEM;
+ }
+
+ r = parse_uid(k, b + i);
+ free(k);
+ if (r < 0)
+ continue;
+
+ i++;
+ }
+ }
+
+ free(t);
+
+ if (sessions)
+ *sessions = a;
+
+ if (uids)
+ *uids = b;
+
+ if (n_uids)
+ *n_uids = n;
+
+ return 0;
+}
+
+_public_ int sd_get_seats(char ***seats) {
+
+ if (!seats)
+ return -EINVAL;
+
+ return get_files_in_directory("/run/systemd/seats/", seats);
+}
+
+_public_ int sd_get_sessions(char ***sessions) {
+
+ if (!sessions)
+ return -EINVAL;
+
+ return get_files_in_directory("/run/systemd/sessions/", sessions);
+}
+
+_public_ int sd_get_uids(uid_t **users) {
+ DIR *d;
+ int r = 0;
+ unsigned n = 0;
+ uid_t *l = NULL;
+
+ if (!users)
+ return -EINVAL;
+
+ d = opendir("/run/systemd/users/");
+ for (;;) {
+ struct dirent buffer, *de;
+ int k;
+ uid_t uid;
+
+ k = readdir_r(d, &buffer, &de);
+ if (k != 0) {
+ r = -k;
+ goto finish;
+ }
+
+ 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 ((unsigned) r >= n) {
+ uid_t *t;
+
+ n = MAX(16, 2*r);
+ t = realloc(l, sizeof(uid_t) * n);
+ if (!t) {
+ r = -ENOMEM;
+ goto finish;
+ }
+
+ l = t;
+ }
+
+ assert((unsigned) r < n);
+ l[r++] = uid;
+ }
+
+finish:
+ if (d)
+ closedir(d);
+
+ if (r >= 0)
+ *users = l;
+ else
+ free(l);
+
+ return r;
+}
+
+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) {
+ const char *path;
+ int fd, k;
+ bool good = false;
+
+ if (!m)
+ return -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) {
+ close_nointr_nofail(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) {
+ close_nointr_nofail(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) {
+ close_nointr_nofail(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) {
+
+ if (!m)
+ return -EINVAL;
+
+ return flush_fd(MONITOR_TO_FD(m));
+}
+
+_public_ int sd_login_monitor_get_fd(sd_login_monitor *m) {
+
+ if (!m)
+ return -EINVAL;
+
+ return MONITOR_TO_FD(m);
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-07-27 04:55:04 +0000