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authorLennart Poettering <lennart@poettering.net>2014-12-19 18:42:50 +0100
committerLennart Poettering <lennart@poettering.net>2014-12-19 19:19:29 +0100
commitcd61c3bfd718fb398cc53ced906266a9297782c9 (patch)
treed727549baccec28d473212b85c55f2e24af25678 /src/machine/machinectl.c
parent8eebf6ad553adb22d7ea5d291de0b0da38606f4d (diff)
machined/machinectl: add logic to show list of available images
This adds a new bus call to machined that enumerates /var/lib/container and returns all trees stored in it, distuingishing three types: - GPT disk images, which are files suffixed with ".gpt" - directory trees - btrfs subvolumes
Diffstat (limited to 'src/machine/machinectl.c')
-rw-r--r--src/machine/machinectl.c99
1 files changed, 97 insertions, 2 deletions
diff --git a/src/machine/machinectl.c b/src/machine/machinectl.c
index a62ffe30ac..d2d3d1600f 100644
--- a/src/machine/machinectl.c
+++ b/src/machine/machinectl.c
@@ -120,6 +120,98 @@ static int list_machines(sd_bus *bus, char **args, unsigned n) {
return 0;
}
+typedef struct ImageInfo {
+ const char *name;
+ const char *type;
+ bool read_only;
+} ImageInfo;
+
+static int compare_image_info(const void *a, const void *b) {
+ const ImageInfo *x = a, *y = b;
+
+ return strcmp(x->name, y->name);
+}
+
+static int list_images(sd_bus *bus, char **args, unsigned n) {
+
+ _cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
+ size_t max_name = strlen("NAME"), max_type = strlen("TYPE");
+ _cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
+ _cleanup_free_ ImageInfo *images = NULL;
+ size_t n_images = 0, n_allocated = 0, j;
+ const char *name, *type, *object;
+ int read_only;
+ int r;
+
+ pager_open_if_enabled();
+
+ r = sd_bus_call_method(
+ bus,
+ "org.freedesktop.machine1",
+ "/org/freedesktop/machine1",
+ "org.freedesktop.machine1.Manager",
+ "ListImages",
+ &error,
+ &reply,
+ "");
+ if (r < 0) {
+ log_error("Could not get images: %s", bus_error_message(&error, -r));
+ return r;
+ }
+
+ r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssbo)");
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+ while ((r = sd_bus_message_read(reply, "(ssbo)", &name, &type, &read_only, &object)) > 0) {
+
+ if (name[0] == '.' && !arg_all)
+ continue;
+
+ if (!GREEDY_REALLOC(images, n_allocated, n_images + 1))
+ return log_oom();
+
+ images[n_images].name = name;
+ images[n_images].type = type;
+ images[n_images].read_only = read_only;
+
+ if (strlen(name) > max_name)
+ max_name = strlen(name);
+
+ if (strlen(type) > max_type)
+ max_type = strlen(type);
+
+ n_images++;
+ }
+ 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);
+
+ qsort_safe(images, n_images, sizeof(ImageInfo), compare_image_info);
+
+ if (arg_legend)
+ printf("%-*s %-*s %-3s\n", (int) max_name, "NAME", (int) max_type, "TYPE", "RO");
+
+ for (j = 0; j < n_images; j++) {
+ printf("%-*s %-*s %-3s\n",
+ (int) max_name, images[j].name,
+ (int) max_type, images[j].type,
+ yes_no(images[j].read_only));
+ }
+
+ if (r < 0)
+ return bus_log_parse_error(r);
+
+
+ if (arg_legend)
+ printf("\n%zu images listed.\n", n_images);
+
+ return 0;
+}
+
static int show_unit_cgroup(sd_bus *bus, const char *unit, pid_t leader) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
@@ -1106,7 +1198,7 @@ static void help(void) {
" -s --signal=SIGNAL Which signal to send\n"
" --read-only Create read-only bind mount\n"
" --mkdir Create directory before bind mounting, if missing\n\n"
- "Commands:\n"
+ "Machine Commands:\n"
" list List running VMs and containers\n"
" status NAME... Show VM/container status\n"
" show NAME... Show properties of one or more VMs/containers\n"
@@ -1117,7 +1209,9 @@ static void help(void) {
" terminate NAME... Terminate one or more VMs/containers\n"
" bind NAME PATH [PATH] Bind mount a path from the host into a container\n"
" copy-to NAME PATH [PATH] Copy files from the host to a container\n"
- " copy-from NAME PATH [PATH] Copy files from a container to the host\n",
+ " copy-from NAME PATH [PATH] Copy files from a container to the host\n\n"
+ "Image commands:\n"
+ " list-images Show available images\n",
program_invocation_short_name);
}
@@ -1247,6 +1341,7 @@ static int machinectl_main(sd_bus *bus, int argc, char *argv[]) {
int (* const dispatch)(sd_bus *bus, char **args, unsigned n);
} verbs[] = {
{ "list", LESS, 1, list_machines },
+ { "list-images", LESS, 1, list_images },
{ "status", MORE, 2, show },
{ "show", MORE, 1, show },
{ "terminate", MORE, 2, terminate_machine },