X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fcgls%2Fcgls.c;h=f400bccc0a72108de04ef369e00156d2434046b0;hp=c689b5c471c47d1be64f48d080e0c53f4eaccd8a;hb=72e6110485926c884f056717a21e4f5f3942908c;hpb=baa89da40a1d42242c9c62603501ada7e9e52613

diff --git a/src/cgls/cgls.c b/src/cgls/cgls.c
index c689b5c47..f400bccc0 100644
--- a/src/cgls/cgls.c
+++ b/src/cgls/cgls.c
@@ -35,6 +35,10 @@
 #include "build.h"
 #include "output-mode.h"
 #include "fileio.h"
+#include "sd-bus.h"
+#include "bus-util.h"
+#include "bus-error.h"
+#include "unit-name.h"
 
 static bool arg_no_pager = false;
 static bool arg_kernel_threads = false;
@@ -43,7 +47,6 @@ static int arg_full = -1;
 static char* arg_machine = NULL;
 
 static void help(void) {
-
         printf("%s [OPTIONS...] [CGROUP...]\n\n"
                "Recursively show control group contents.\n\n"
                "  -h --help           Show this help\n"
@@ -52,8 +55,8 @@ static void help(void) {
                "  -a --all            Show all groups, including empty\n"
                "  -l --full           Do not ellipsize output\n"
                "  -k                  Include kernel threads in output\n"
-               "  -M --machine        Show container\n",
-               program_invocation_short_name);
+               "  -M --machine        Show container\n"
+               , program_invocation_short_name);
 }
 
 static int parse_argv(int argc, char *argv[]) {
@@ -70,7 +73,7 @@ static int parse_argv(int argc, char *argv[]) {
                 { "all",       no_argument,       NULL, 'a'          },
                 { "full",      no_argument,       NULL, 'l'          },
                 { "machine",   required_argument, NULL, 'M'          },
-                { NULL,        0,                 NULL, 0            }
+                {}
         };
 
         int c;
@@ -78,7 +81,7 @@ static int parse_argv(int argc, char *argv[]) {
         assert(argc >= 1);
         assert(argv);
 
-        while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0) {
+        while ((c = getopt_long(argc, argv, "hkalM:", options, NULL)) >= 0)
 
                 switch (c) {
 
@@ -115,10 +118,8 @@ static int parse_argv(int argc, char *argv[]) {
                         return -EINVAL;
 
                 default:
-                        log_error("Unknown option code %c", c);
-                        return -EINVAL;
+                        assert_not_reached("Unhandled option");
                 }
-        }
 
         return 1;
 }
@@ -126,7 +127,8 @@ static int parse_argv(int argc, char *argv[]) {
 int main(int argc, char *argv[]) {
         int r = 0, retval = EXIT_FAILURE;
         int output_flags;
-        char _cleanup_free_ *root = NULL;
+        _cleanup_free_ char *root = NULL;
+        _cleanup_bus_close_unref_ sd_bus *bus = NULL;
 
         log_parse_environment();
         log_open();
@@ -151,6 +153,12 @@ int main(int argc, char *argv[]) {
                 arg_all * OUTPUT_SHOW_ALL |
                 (arg_full > 0) * OUTPUT_FULL_WIDTH;
 
+        r = bus_open_transport(BUS_TRANSPORT_LOCAL, NULL, false, &bus);
+        if (r < 0) {
+                log_error_errno(r, "Failed to create bus connection: %m");
+                goto finish;
+        }
+
         if (optind < argc) {
                 int i;
 
@@ -178,7 +186,7 @@ int main(int argc, char *argv[]) {
 
                 p = get_current_dir_name();
                 if (!p) {
-                        log_error("Cannot determine current working directory: %m");
+                        log_error_errno(errno, "Cannot determine current working directory: %m");
                         goto finish;
                 }
 
@@ -189,13 +197,57 @@ int main(int argc, char *argv[]) {
                 } else {
                         if (arg_machine) {
                                 char *m;
+                                const char *cgroup;
+                                _cleanup_free_ char *scope = NULL;
+                                _cleanup_free_ char *path = NULL;
+                                _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+                                _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+
                                 m = strappenda("/run/systemd/machines/", arg_machine);
-                                r = parse_env_file(m, NEWLINE, "CGROUP", &root, NULL);
+                                r = parse_env_file(m, NEWLINE, "SCOPE", &scope, NULL);
+                                if (r < 0) {
+                                        log_error_errno(r, "Failed to get machine path: %m");
+                                        goto finish;
+                                }
+
+                                path = unit_dbus_path_from_name(scope);
+                                if (!path) {
+                                        log_oom();
+                                        goto finish;
+                                }
+
+                                r = sd_bus_get_property(
+                                                bus,
+                                                "org.freedesktop.systemd1",
+                                                path,
+                                                "org.freedesktop.systemd1.Scope",
+                                                "ControlGroup",
+                                                &error,
+                                                &reply,
+                                                "s");
+
+                                if (r < 0) {
+                                        log_error("Failed to query ControlGroup: %s", bus_error_message(&error, -r));
+                                        goto finish;
+                                }
+
+                                r = sd_bus_message_read(reply, "s", &cgroup);
+                                if (r < 0) {
+                                        bus_log_parse_error(r);
+                                        goto finish;
+                                }
+
+                                root = strdup(cgroup);
+                                if (!root) {
+                                        log_oom();
+                                        goto finish;
+                                }
+
                         } else
                                 r = cg_get_root_path(&root);
                         if (r < 0) {
-                                log_error("Failed to get %s path: %s",
-                                          arg_machine ? "machine" : "root", strerror(-r));
+                                log_error_errno(r, "Failed to get %s path: %m",
+                                                arg_machine ? "machine" : "root");
                                 goto finish;
                         }
 
@@ -205,7 +257,7 @@ int main(int argc, char *argv[]) {
         }
 
         if (r < 0) {
-                log_error("Failed to list cgroup tree %s: %s", root, strerror(-r));
+                log_error_errno(r, "Failed to list cgroup tree %s: %m", root);
                 retval = EXIT_FAILURE;
         } else
                 retval = EXIT_SUCCESS;