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qga: Add 'guest-get-users' command

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A command that will list all currently logged in users, and the time
since when they are logged in.

Examples:

virsh # qemu-agent-command F25 '{ "execute": "guest-get-users" }'
{"return":[{"login-time":1490622289.903835,"user":"root"}]}

virsh # qemu-agent-command Win2k12r2 '{ "execute": "guest-get-users" }'
{"return":[{"login-time":1490351044.670552,"domain":"LADIDA",
"user":"Administrator"}]}

Signed-off-by: Vinzenz Feenstra <vfeenstr@redhat.com>
* make g_hash_table_contains compat func inline to avoid
  unused warnings
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
This commit is contained in:
Vinzenz Feenstra 2017-04-19 11:26:15 +02:00 • committed by Michael Roth
parent 1dbfbc17fe
commit 161a56a906
5 changed files with 195 additions and 1 deletions
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60
qga/commands-posix.c
View file

@ -15,6 +15,7 @@
#include <sys/ioctl.h>
#include <sys/wait.h>
#include <dirent.h>
#include <utmpx.h>
#include "qga/guest-agent-core.h"
#include "qga-qmp-commands.h"
#include "qapi/qmp/qerror.h"
@ -2517,3 +2518,62 @@ void ga_command_state_init(GAState *s, GACommandState *cs)
ga_command_state_add(cs, NULL, guest_fsfreeze_cleanup);
#endif
}
#define QGA_MICRO_SECOND_TO_SECOND 1000000
static double ga_get_login_time(struct utmpx *user_info)
{
double seconds = (double)user_info->ut_tv.tv_sec;
double useconds = (double)user_info->ut_tv.tv_usec;
useconds /= QGA_MICRO_SECOND_TO_SECOND;
return seconds + useconds;
}
GuestUserList *qmp_guest_get_users(Error **err)
{
GHashTable *cache = NULL;
GuestUserList *head = NULL, *cur_item = NULL;
struct utmpx *user_info = NULL;
gpointer value = NULL;
GuestUser *user = NULL;
GuestUserList *item = NULL;
double login_time = 0;
cache = g_hash_table_new(g_str_hash, g_str_equal);
setutxent();
for (;;) {
user_info = getutxent();
if (user_info == NULL) {
break;
} else if (user_info->ut_type != USER_PROCESS) {
continue;
} else if (g_hash_table_contains(cache, user_info->ut_user)) {
value = g_hash_table_lookup(cache, user_info->ut_user);
user = (GuestUser *)value;
login_time = ga_get_login_time(user_info);
/* We're ensuring the earliest login time to be sent */
if (login_time < user->login_time) {
user->login_time = login_time;
}
continue;
}
item = g_new0(GuestUserList, 1);
item->value = g_new0(GuestUser, 1);
item->value->user = g_strdup(user_info->ut_user);
item->value->login_time = ga_get_login_time(user_info);
g_hash_table_insert(cache, item->value->user, item->value);
if (!cur_item) {
head = cur_item = item;
} else {
cur_item->next = item;
cur_item = item;
}
}
endutxent();
g_hash_table_destroy(cache);
return head;
}