tools/kvm/builtin-list.c

   1 #include <kvm/util.h>
   2 #include <kvm/kvm-cmd.h>
   3 #include <kvm/builtin-list.h>
   4 #include <kvm/kvm.h>
   5 #include <kvm/parse-options.h>
   6
   7 #include <stdio.h>
   8 #include <string.h>
   9 #include <signal.h>
  10 #include <fcntl.h>
  11
  12 #define PROCESS_NAME "kvm"
  13
  14 static const char * const list_usage[] = {
  15         "kvm list",
  16         NULL
  17 };
  18
  19 static const struct option list_options[] = {
  20         OPT_END()
  21 };
  22
  23 void kvm_list_help(void)
  24 {
  25         usage_with_options(list_usage, list_options);
  26 }
  27
  28 static int print_guest(const char *name, int pid)
  29 {
  30         char proc_name[PATH_MAX];
  31         char *comm = NULL;
  32         FILE *fd;
  33
  34         sprintf(proc_name, "/proc/%d/stat", pid);
  35         fd = fopen(proc_name, "r");
  36         if (fd == NULL)
  37                 goto cleanup;
  38         if (fscanf(fd, "%*u (%as)", &comm) == 0)
  39                 goto cleanup;
  40         if (strncmp(comm, PROCESS_NAME, strlen(PROCESS_NAME)))
  41                 goto cleanup;
  42
  43         printf("%5d %s\n", pid, name);
  44
  45         free(comm);
  46
  47         fclose(fd);
  48
  49         return 0;
  50
  51 cleanup:
  52         if (fd)
  53                 fclose(fd);
  54         if (comm)
  55                 free(comm);
  56
  57         kvm__remove_pidfile(name);
  58         return 0;
  59 }
  60
  61 int kvm_cmd_list(int argc, const char **argv, const char *prefix)
  62 {
  63         printf("  PID GUEST\n");
  64
  65         return kvm__enumerate_instances(print_guest);
  66 }