X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Flogin%2Flogind-session-dbus.c;h=d1e652344686426010cb25362f18e3ec716420ca;hp=fc728bb9d60e9d775b174b7412ab0f2332460f53;hb=a1194d1c4627a7dc4077773f871f6622a09d142a;hpb=6e18964d3a365567954fe10ddcfad74babdc427c diff --git a/src/login/logind-session-dbus.c b/src/login/logind-session-dbus.c index fc728bb9d..d1e652344 100644 --- a/src/login/logind-session-dbus.c +++ b/src/login/logind-session-dbus.c @@ -1,5 +1,3 @@ -/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ - /*** This file is part of systemd. @@ -21,16 +19,18 @@ #include #include -#include -#include "util.h" -#include "strv.h" +#include "alloc-util.h" +#include "bus-common-errors.h" +#include "bus-label.h" #include "bus-util.h" -#include "bus-errors.h" - -#include "logind.h" -#include "logind-session.h" +#include "fd-util.h" #include "logind-session-device.h" +#include "logind-session.h" +#include "logind.h" +#include "signal-util.h" +#include "strv.h" +#include "util.h" static int property_get_user( sd_bus *bus, @@ -163,7 +163,7 @@ static int property_get_idle_since_hint( sd_bus_error *error) { Session *s = userdata; - dual_timestamp t; + dual_timestamp t = DUAL_TIMESTAMP_NULL; uint64_t u; int r; @@ -180,14 +180,45 @@ static int property_get_idle_since_hint( return sd_bus_message_append(reply, "t", u); } -static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int property_get_locked_hint( + sd_bus *bus, + const char *path, + const char *interface, + const char *property, + sd_bus_message *reply, + void *userdata, + sd_bus_error *error) { + Session *s = userdata; - int r; assert(bus); + assert(reply); + assert(s); + + return sd_bus_message_append(reply, "b", session_get_locked_hint(s) > 0); +} + +int bus_session_method_terminate(sd_bus_message *message, void *userdata, sd_bus_error *error) { + Session *s = userdata; + int r; + assert(message); assert(s); + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + r = session_stop(s, true); if (r < 0) return r; @@ -195,11 +226,10 @@ static int method_terminate(sd_bus *bus, sd_bus_message *message, void *userdata return sd_bus_reply_method_return(message, NULL); } -static int method_activate(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +int bus_session_method_activate(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; int r; - assert(bus); assert(message); assert(s); @@ -210,28 +240,40 @@ static int method_activate(sd_bus *bus, sd_bus_message *message, void *userdata, return sd_bus_reply_method_return(message, NULL); } -static int method_lock(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +int bus_session_method_lock(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; int r; - assert(bus); assert(message); assert(s); - r = session_send_lock(s, streq(sd_bus_message_get_member(message), "Lock")); + r = bus_verify_polkit_async( + message, + CAP_SYS_ADMIN, + "org.freedesktop.login1.lock-sessions", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + + r = session_send_lock(s, strstr(sd_bus_message_get_member(message), "Lock")); if (r < 0) return r; return sd_bus_reply_method_return(message, NULL); } -static int method_set_idle_hint(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; +static int method_set_idle_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; Session *s = userdata; uid_t uid; int r, b; - assert(bus); assert(message); assert(s); @@ -239,30 +281,58 @@ static int method_set_idle_hint(sd_bus *bus, sd_bus_message *message, void *user if (r < 0) return r; - r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_UID, &creds); + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); if (r < 0) return r; - r = sd_bus_creds_get_uid(creds, &uid); + r = sd_bus_creds_get_euid(creds, &uid); if (r < 0) return r; if (uid != 0 && uid != s->user->uid) - return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session my set idle hint"); + return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set idle hint"); session_set_idle_hint(s, b); return sd_bus_reply_method_return(message, NULL); } -static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int method_set_locked_hint(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + Session *s = userdata; + uid_t uid; + int r, b; + + assert(message); + assert(s); + + r = sd_bus_message_read(message, "b", &b); + if (r < 0) + return r; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); + if (r < 0) + return r; + + r = sd_bus_creds_get_euid(creds, &uid); + if (r < 0) + return r; + + if (uid != 0 && uid != s->user->uid) + return sd_bus_error_setf(error, SD_BUS_ERROR_ACCESS_DENIED, "Only owner of session may set locked hint"); + + session_set_locked_hint(s, b); + + return sd_bus_reply_method_return(message, NULL); +} + +int bus_session_method_kill(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; const char *swho; int32_t signo; KillWho who; int r; - assert(bus); assert(message); assert(s); @@ -278,9 +348,23 @@ static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_ return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid kill parameter '%s'", swho); } - if (signo <= 0 || signo >= _NSIG) + if (!SIGNAL_VALID(signo)) return sd_bus_error_setf(error, SD_BUS_ERROR_INVALID_ARGS, "Invalid signal %i", signo); + r = bus_verify_polkit_async( + message, + CAP_KILL, + "org.freedesktop.login1.manage", + NULL, + false, + s->user->uid, + &s->manager->polkit_registry, + error); + if (r < 0) + return r; + if (r == 0) + return 1; /* Will call us back */ + r = session_kill(s, who, signo); if (r < 0) return r; @@ -288,13 +372,12 @@ static int method_kill(sd_bus *bus, sd_bus_message *message, void *userdata, sd_ return sd_bus_reply_method_return(message, NULL); } -static int method_take_control(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; +static int method_take_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; Session *s = userdata; int r, force; uid_t uid; - assert(bus); assert(message); assert(s); @@ -302,11 +385,11 @@ static int method_take_control(sd_bus *bus, sd_bus_message *message, void *userd if (r < 0) return r; - r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_UID, &creds); + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_EUID, &creds); if (r < 0) return r; - r = sd_bus_creds_get_uid(creds, &uid); + r = sd_bus_creds_get_euid(creds, &uid); if (r < 0) return r; @@ -320,10 +403,9 @@ static int method_take_control(sd_bus *bus, sd_bus_message *message, void *userd return sd_bus_reply_method_return(message, NULL); } -static int method_release_control(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int method_release_control(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; - assert(bus); assert(message); assert(s); @@ -335,14 +417,13 @@ static int method_release_control(sd_bus *bus, sd_bus_message *message, void *us return sd_bus_reply_method_return(message, NULL); } -static int method_take_device(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int method_take_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; uint32_t major, minor; SessionDevice *sd; dev_t dev; int r; - assert(bus); assert(message); assert(s); @@ -374,14 +455,13 @@ static int method_take_device(sd_bus *bus, sd_bus_message *message, void *userda return r; } -static int method_release_device(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int method_release_device(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; uint32_t major, minor; SessionDevice *sd; dev_t dev; int r; - assert(bus); assert(message); assert(s); @@ -401,14 +481,13 @@ static int method_release_device(sd_bus *bus, sd_bus_message *message, void *use return sd_bus_reply_method_return(message, NULL); } -static int method_pause_device_complete(sd_bus *bus, sd_bus_message *message, void *userdata, sd_bus_error *error) { +static int method_pause_device_complete(sd_bus_message *message, void *userdata, sd_bus_error *error) { Session *s = userdata; uint32_t major, minor; SessionDevice *sd; dev_t dev; int r; - assert(bus); assert(message); assert(s); @@ -455,13 +534,15 @@ const sd_bus_vtable session_vtable[] = { SD_BUS_PROPERTY("IdleHint", "b", property_get_idle_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IdleSinceHint", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), SD_BUS_PROPERTY("IdleSinceHintMonotonic", "t", property_get_idle_since_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), + SD_BUS_PROPERTY("LockedHint", "b", property_get_locked_hint, 0, SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE), - SD_BUS_METHOD("Terminate", NULL, NULL, method_terminate, SD_BUS_VTABLE_CAPABILITY(CAP_KILL)), - SD_BUS_METHOD("Activate", NULL, NULL, method_activate, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("Lock", NULL, NULL, method_lock, 0), - SD_BUS_METHOD("Unlock", NULL, NULL, method_lock, 0), + SD_BUS_METHOD("Terminate", NULL, NULL, bus_session_method_terminate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Activate", NULL, NULL, bus_session_method_activate, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Lock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Unlock", NULL, NULL, bus_session_method_lock, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("SetIdleHint", "b", NULL, method_set_idle_hint, SD_BUS_VTABLE_UNPRIVILEGED), - SD_BUS_METHOD("Kill", "si", NULL, method_kill, SD_BUS_VTABLE_CAPABILITY(CAP_KILL)), + SD_BUS_METHOD("SetLockedHint", "b", NULL, method_set_locked_hint, SD_BUS_VTABLE_UNPRIVILEGED), + SD_BUS_METHOD("Kill", "si", NULL, bus_session_method_kill, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("TakeControl", "b", NULL, method_take_control, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("ReleaseControl", NULL, NULL, method_release_control, SD_BUS_VTABLE_UNPRIVILEGED), SD_BUS_METHOD("TakeDevice", "uu", "hb", method_take_device, SD_BUS_VTABLE_UNPRIVILEGED), @@ -488,25 +569,23 @@ int session_object_find(sd_bus *bus, const char *path, const char *interface, vo assert(m); if (streq(path, "/org/freedesktop/login1/session/self")) { - _cleanup_bus_creds_unref_ sd_bus_creds *creds = NULL; + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; sd_bus_message *message; - pid_t pid; + const char *name; - message = sd_bus_get_current(bus); + message = sd_bus_get_current_message(bus); if (!message) return 0; - r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_PID, &creds); + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); if (r < 0) return r; - r = sd_bus_creds_get_pid(creds, &pid); + r = sd_bus_creds_get_session(creds, &name); if (r < 0) return r; - r = manager_get_session_by_pid(m, pid, &session); - if (r <= 0) - return 0; + session = hashmap_get(m->sessions, name); } else { _cleanup_free_ char *e = NULL; const char *p; @@ -515,15 +594,16 @@ int session_object_find(sd_bus *bus, const char *path, const char *interface, vo if (!p) return 0; - e = sd_bus_label_unescape(p); + e = bus_label_unescape(p); if (!e) return -ENOMEM; session = hashmap_get(m->sessions, e); - if (!session) - return 0; } + if (!session) + return 0; + *found = session; return 1; } @@ -533,7 +613,7 @@ char *session_bus_path(Session *s) { assert(s); - t = sd_bus_label_escape(s->id); + t = bus_label_escape(s->id); if (!t) return NULL; @@ -542,6 +622,7 @@ char *session_bus_path(Session *s) { int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) { _cleanup_strv_free_ char **l = NULL; + sd_bus_message *message; Manager *m = userdata; Session *session; Iterator i; @@ -563,6 +644,25 @@ int session_node_enumerator(sd_bus *bus, const char *path, void *userdata, char return r; } + message = sd_bus_get_current_message(bus); + if (message) { + _cleanup_(sd_bus_creds_unrefp) sd_bus_creds *creds = NULL; + const char *name; + + r = sd_bus_query_sender_creds(message, SD_BUS_CREDS_SESSION|SD_BUS_CREDS_AUGMENT, &creds); + if (r >= 0) { + r = sd_bus_creds_get_session(creds, &name); + if (r >= 0) { + session = hashmap_get(m->sessions, name); + if (session) { + r = strv_extend(&l, "/org/freedesktop/login1/session/self"); + if (r < 0) + return r; + } + } + } + } + *nodes = l; l = NULL; @@ -640,7 +740,7 @@ int session_send_lock_all(Manager *m, bool lock) { } int session_send_create_reply(Session *s, sd_bus_error *error) { - _cleanup_bus_message_unref_ sd_bus_message *c = NULL; + _cleanup_(sd_bus_message_unrefp) sd_bus_message *c = NULL; _cleanup_close_ int fifo_fd = -1; _cleanup_free_ char *p = NULL; @@ -653,8 +753,10 @@ int session_send_create_reply(Session *s, sd_bus_error *error) { if (!s->create_message) return 0; +#if 0 /// elogind does not support scope and service jobs if (!sd_bus_error_is_set(error) && (s->scope_job || s->user->service_job)) return 0; +#endif // 0 c = s->create_message; s->create_message = NULL; @@ -666,18 +768,21 @@ int session_send_create_reply(Session *s, sd_bus_error *error) { if (fifo_fd < 0) return fifo_fd; - /* Update the session state file before we notify the client - * about the result. */ + /* Update the session and user state files before we notify + * the client about the result. */ session_save(s); + user_save(s->user); p = session_bus_path(s); if (!p) return -ENOMEM; log_debug("Sending reply about created session: " - "id=%s object_path=%s runtime_path=%s session_fd=%d seat=%s vtnr=%u", + "id=%s object_path=%s uid=%u runtime_path=%s " + "session_fd=%d seat=%s vtnr=%u", s->id, p, + (uint32_t) s->user->uid, s->user->runtime_path, fifo_fd, s->seat ? s->seat->id : "",