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builtin-list.c
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builtin-list.c
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#include <kvm/util.h>
#include <kvm/kvm-cmd.h>
#include <kvm/builtin-list.h>
#include <kvm/kvm.h>
#include <kvm/parse-options.h>
#include <kvm/kvm-ipc.h>
#include <dirent.h>
#include <stdio.h>
#include <string.h>
#include <signal.h>
#include <fcntl.h>
static bool run;
static bool rootfs;
static const char * const list_usage[] = {
"lkvm list",
NULL
};
static const struct option list_options[] = {
OPT_GROUP("General options:"),
OPT_BOOLEAN('i', "run", &run, "List running instances"),
OPT_BOOLEAN('r', "rootfs", &rootfs, "List rootfs instances"),
OPT_END()
};
#define KVM_INSTANCE_RUNNING "running"
#define KVM_INSTANCE_PAUSED "paused"
#define KVM_INSTANCE_SHUTOFF "shut off"
void kvm_list_help(void)
{
usage_with_options(list_usage, list_options);
}
static pid_t get_pid(int sock)
{
pid_t pid;
int r;
r = kvm_ipc__send(sock, KVM_IPC_PID);
if (r < 0)
return r;
r = read(sock, &pid, sizeof(pid));
if (r < 0)
return r;
return pid;
}
int get_vmstate(int sock)
{
int vmstate;
int r;
r = kvm_ipc__send(sock, KVM_IPC_VMSTATE);
if (r < 0)
return r;
r = read(sock, &vmstate, sizeof(vmstate));
if (r < 0)
return r;
return vmstate;
}
static int print_guest(const char *name, int sock)
{
pid_t pid;
int vmstate;
pid = get_pid(sock);
vmstate = get_vmstate(sock);
if ((int)pid < 0 || vmstate < 0)
return -1;
if (vmstate == KVM_VMSTATE_PAUSED)
printf("%5d %-20s %s\n", pid, name, KVM_INSTANCE_PAUSED);
else
printf("%5d %-20s %s\n", pid, name, KVM_INSTANCE_RUNNING);
return 0;
}
static int kvm_list_running_instances(void)
{
return kvm__enumerate_instances(print_guest);
}
static int kvm_list_rootfs(void)
{
DIR *dir;
struct dirent *dirent;
dir = opendir(kvm__get_dir());
if (dir == NULL)
return -1;
while ((dirent = readdir(dir))) {
if (dirent->d_type == DT_DIR &&
strcmp(dirent->d_name, ".") &&
strcmp(dirent->d_name, ".."))
printf("%5s %-20s %s\n", "", dirent->d_name, KVM_INSTANCE_SHUTOFF);
}
return 0;
}
static void parse_setup_options(int argc, const char **argv)
{
while (argc != 0) {
argc = parse_options(argc, argv, list_options, list_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
if (argc != 0)
kvm_list_help();
}
}
int kvm_cmd_list(int argc, const char **argv, const char *prefix)
{
int status, r;
parse_setup_options(argc, argv);
if (!run && !rootfs)
run = rootfs = true;
printf("%6s %-20s %s\n", "PID", "NAME", "STATE");
printf("------------------------------------\n");
status = 0;
if (run) {
r = kvm_list_running_instances();
if (r < 0)
perror("Error listing instances");
status |= r;
}
if (rootfs) {
r = kvm_list_rootfs();
if (r < 0)
perror("Error listing rootfs");
status |= r;
}
return status;
}