From d3706690bf2953cb8e0362253dc68d77989de3be Mon Sep 17 00:00:00 2001

From: Lukas Nykryn <lnykryn@redhat.com>

Date: Fri, 11 Sep 2015 13:37:59 +0200

Subject: [PATCH] loginctl: print nontrivial properties in logictl show-*

Cherry-picked from: 2a998c74028a109d6bd8888951abfa8e25a15fb1

Resolves: #1260465

---

 src/login/loginctl.c | 152 ++++++++++++++++++++++++++++++++++++++++++++++++++-

 src/shared/macro.h   |  13 +++++

 2 files changed, 162 insertions(+), 3 deletions(-)

diff --git a/src/login/loginctl.c b/src/login/loginctl.c

index b0eede9..6c8a59e 100644

--- a/src/login/loginctl.c

+++ b/src/login/loginctl.c

@@ -657,19 +657,165 @@ finish:

         return r;

 }

+static int print_property(const char *name, sd_bus_message *m, const char *contents) {

+        int r;

+

+        assert(name);

+        assert(m);

+        assert(contents);

+

+        if (arg_property && !strv_find(arg_property, name))

+                /* skip what we didn't read */

+                return sd_bus_message_skip(m, contents);

+

+        switch (contents[0]) {

+

+        case SD_BUS_TYPE_STRUCT_BEGIN:

+

+                if (contents[1] == SD_BUS_TYPE_STRING && STR_IN_SET(name, "Display", "Seat", "ActiveSession")) {

+                        const char *s;

+

+                        r = sd_bus_message_read(m, "(so)", &s, NULL);

+                        if (r < 0)

+                                return bus_log_parse_error(r);

+

+                        if (arg_all || !isempty(s))

+                                printf("%s=%s\n", name, s);

+

+                        return 0;

+

+                } else if (contents[1] == SD_BUS_TYPE_UINT32 && streq(name, "User")) {

+                        uint32_t uid;

+

+                        r = sd_bus_message_read(m, "(uo)", &uid, NULL);

+                        if (r < 0)

+                                return bus_log_parse_error(r);

+

+                        if (UID_IS_INVALID(uid)) {

+                                log_error("Invalid user ID: " UID_FMT, uid);

+                                return -EINVAL;

+                        }

+

+                        printf("%s=" UID_FMT "\n", name, uid);

+

+                        return 0;

+                }

+

+                break;

+

+        case SD_BUS_TYPE_ARRAY:

+

+                if (contents[1] == SD_BUS_TYPE_STRUCT_BEGIN && streq(name, "Sessions")) {

+                        const char *s;

+                        bool space = false;

+

+                        r = sd_bus_message_enter_container(m, SD_BUS_TYPE_ARRAY, "(so)");

+                        if (r < 0)

+                                return bus_log_parse_error(r);

+

+                        printf("%s=", name);

+

+                        while ((r = sd_bus_message_read(m, "(so)", &s, NULL)) > 0) {

+                                printf("%s%s", space ? " " : "", s);

+                                space = true;

+                        }

+

+                        printf("\n");

+

+                        if (r < 0)

+                                return bus_log_parse_error(r);

+

+                        r = sd_bus_message_exit_container(m);

+                        if (r < 0)

+                                return bus_log_parse_error(r);

+

+                        return 0;

+                }

+

+                break;

+        }

+

+        r = bus_print_property(name, m, arg_all);

+        if (r < 0)

+                return bus_log_parse_error(r);

+

+        if (r == 0) {

+                r = sd_bus_message_skip(m, contents);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+

+                if (arg_all)

+                        printf("%s=[unprintable]\n", name);

+        }

+

+        return 0;

+}

+

 static int show_properties(sd_bus *bus, const char *path, bool *new_line) {

+        _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;

+        _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;

         int r;

+        assert(bus);

+        assert(path);

+        assert(new_line);

+

+        r = sd_bus_call_method(

+                        bus,

+                        "org.freedesktop.login1",

+                        path,

+                        "org.freedesktop.DBus.Properties",

+                        "GetAll",

+                        &error,

+                        &reply,

+                        "s", "");

+        if (r < 0)

+                return log_error_errno(r, "Failed to get properties: %s", bus_error_message(&error, r));

+

+        r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "{sv}");

+        if (r < 0)

+                return bus_log_parse_error(r);

+

         if (*new_line)

                 printf("\n");

         *new_line = true;

-        r = bus_print_all_properties(bus, "org.freedesktop.login1", path, arg_property, arg_all);

+        while ((r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_DICT_ENTRY, "sv")) > 0) {

+                const char *name, *contents;

+

+                r = sd_bus_message_read(reply, "s", &name);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+

+                r = sd_bus_message_peek_type(reply, NULL, &contents);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+

+                r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_VARIANT, contents);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+

+                r = print_property(name, reply, contents);

+                if (r < 0)

+                        return r;

+

+                r = sd_bus_message_exit_container(reply);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+

+                r = sd_bus_message_exit_container(reply);

+                if (r < 0)

+                        return bus_log_parse_error(r);

+        }

         if (r < 0)

-                log_error_errno(r, "Could not get properties: %m");

+                return bus_log_parse_error(r);

-        return r;

+        r = sd_bus_message_exit_container(reply);

+        if (r < 0)

+                return bus_log_parse_error(r);

+

+        return 0;

 }

 static int show_session(int argc, char *argv[], void *userdata) {

diff --git a/src/shared/macro.h b/src/shared/macro.h

index 7f89951..9d857dc 100644

--- a/src/shared/macro.h

+++ b/src/shared/macro.h

@@ -26,6 +26,7 @@

 #include <sys/types.h>

 #include <sys/uio.h>

 #include <inttypes.h>

+#include <stdbool.h>

 #define _printf_(a,b) __attribute__ ((format (printf, a, b)))

 #define _alloc_(...) __attribute__ ((alloc_size(__VA_ARGS__)))

@@ -451,6 +452,18 @@ do {                                                                    \

 #define GID_INVALID ((gid_t) -1)

 #define MODE_INVALID ((mode_t) -1)

+static inline bool UID_IS_INVALID(uid_t uid) {

+        /* We consider both the old 16bit -1 user and the newer 32bit

+         * -1 user invalid, since they are or used to be incompatible

+         * with syscalls such as setresuid() or chown(). */

+

+        return uid == (uid_t) ((uint32_t) -1) || uid == (uid_t) ((uint16_t) -1);

+}

+

+static inline bool GID_IS_INVALID(gid_t gid) {

+        return gid == (gid_t) ((uint32_t) -1) || gid == (gid_t) ((uint16_t) -1);

+}

+

 #define DEFINE_TRIVIAL_CLEANUP_FUNC(type, func)                 \

         static inline void func##p(type *p) {                   \

                 if (*p)                                         \