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machinectl: prettify "machinectl list" output

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This commit is contained in:
Lennart Poettering 2015-01-07 19:13:48 +01:00
parent 1ed0c19f81
commit 0b63e2789f
1 changed files with 52 additions and 8 deletions
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60
src/machine/machinectl.c
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@ -74,13 +74,27 @@ static void pager_open_if_enabled(void) {
pager_open(false);
}
typedef struct MachineInfo {
const char *name;
const char *class;
const char *service;
} MachineInfo;
static int compare_machine_info(const void *a, const void *b) {
const MachineInfo *x = a, *y = b;
return strcmp(x->name, y->name);
}
static int list_machines(int argc, char *argv[], void *userdata) {
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
size_t max_name = strlen("MACHINE"), max_class = strlen("CLASS"), max_service = strlen("SERVICE");
_cleanup_bus_error_free_ sd_bus_error error = SD_BUS_ERROR_NULL;
_cleanup_bus_message_unref_ sd_bus_message *reply = NULL;
_cleanup_free_ MachineInfo *machines = NULL;
const char *name, *class, *service, *object;
size_t n_machines = 0, n_allocated = 0, j;
sd_bus *bus = userdata;
unsigned k = 0;
int r;
assert(bus);
@ -101,17 +115,33 @@ static int list_machines(int argc, char *argv[], void *userdata) {
return r;
}
if (arg_legend)
printf("%-32s %-9s %-16s\n", "MACHINE", "CONTAINER", "SERVICE");
r = sd_bus_message_enter_container(reply, SD_BUS_TYPE_ARRAY, "(ssso)");
if (r < 0)
return bus_log_parse_error(r);
while ((r = sd_bus_message_read(reply, "(ssso)", &name, &class, &service, &object)) > 0) {
printf("%-32s %-9s %-16s\n", name, class, service);
size_t l;
k++;
if (!GREEDY_REALLOC(machines, n_allocated, n_machines + 1))
return log_oom();
machines[n_machines].name = name;
machines[n_machines].class = class;
machines[n_machines].service = service;
l = strlen(name);
if (l > max_name)
max_name = l;
l = strlen(class);
if (l > max_class)
max_class = l;
l = strlen(service);
if (l > max_service)
max_service = l;
n_machines ++;
}
if (r < 0)
return bus_log_parse_error(r);
@ -120,8 +150,22 @@ static int list_machines(int argc, char *argv[], void *userdata) {
if (r < 0)
return bus_log_parse_error(r);
qsort_safe(machines, n_machines, sizeof(MachineInfo), compare_machine_info);
if (arg_legend)
printf("\n%u machines listed.\n", k);
printf("%-*s %-*s %-*s\n",
(int) max_name, "MACHINE",
(int) max_class, "CLASS",
(int) max_service, "SERVICE");
for (j = 0; j < n_machines; j++)
printf("%-*s %-*s %-*s\n",
(int) max_name, machines[j].name,
(int) max_class, machines[j].class,
(int) max_service, machines[j].service);
if (arg_legend)
printf("\n%zu machines listed.\n", n_machines);
return 0;
}