1 #include <kvm/util.h> 2 #include <kvm/kvm-cmd.h> 3 #include <kvm/builtin-pause.h> 4 #include <kvm/kvm.h> 5 #include <kvm/parse-options.h> 6 #include <kvm/kvm-ipc.h> 7 8 #include <stdio.h> 9 #include <string.h> 10 #include <signal.h> 11 12 struct pause_cmd { 13 u32 type; 14 u32 len; 15 }; 16 17 static bool all; 18 static int instance; 19 static const char *instance_name; 20 21 static const char * const pause_usage[] = { 22 "lkvm pause [--all] [-n name]", 23 NULL 24 }; 25 26 static const struct option pause_options[] = { 27 OPT_GROUP("General options:"), 28 OPT_BOOLEAN('a', "all", &all, "Pause all instances"), 29 OPT_STRING('n', "name", &instance_name, "name", "Instance name"), 30 OPT_END() 31 }; 32 33 static void parse_pause_options(int argc, const char **argv) 34 { 35 while (argc != 0) { 36 argc = parse_options(argc, argv, pause_options, pause_usage, 37 PARSE_OPT_STOP_AT_NON_OPTION); 38 if (argc != 0) 39 kvm_pause_help(); 40 } 41 } 42 43 void kvm_pause_help(void) 44 { 45 usage_with_options(pause_usage, pause_options); 46 } 47 48 static int do_pause(const char *name, int sock) 49 { 50 struct pause_cmd cmd = {KVM_IPC_PAUSE, 0}; 51 int r; 52 53 r = write(sock, &cmd, sizeof(cmd)); 54 if (r < 0) 55 return r; 56 57 return 0; 58 } 59 60 int kvm_cmd_pause(int argc, const char **argv, const char *prefix) 61 { 62 parse_pause_options(argc, argv); 63 64 if (all) 65 return kvm__enumerate_instances(do_pause); 66 67 if (instance_name == NULL && 68 instance == 0) 69 kvm_pause_help(); 70 71 if (instance_name) 72 instance = kvm__get_sock_by_instance(instance_name); 73 74 if (instance <= 0) 75 die("Failed locating instance"); 76 77 return do_pause(instance_name, instance); 78 } 79