tools/kvm/builtin-help.c

   1 #include <stdio.h>
   2 #include <string.h>
   3
   4 /* user defined headers */
   5 #include <common-cmds.h>
   6
   7 #include <kvm/util.h>
   8 #include <kvm/kvm-cmd.h>
   9 #include <kvm/builtin-help.h>
  10
  11
  12 const char kvm_usage_string[] =
  13         "kvm COMMAND [ARGS]";
  14
  15 const char kvm_more_info_string[] =
  16         "See 'kvm help COMMAND' for more information on a specific command.";
  17
  18
  19 static void list_common_cmds_help(void)
  20 {
  21         unsigned int i, longest = 0;
  22
  23         for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
  24                 if (longest < strlen(common_cmds[i].name))
  25                         longest = strlen(common_cmds[i].name);
  26         }
  27
  28         puts(" The most commonly used kvm commands are:");
  29         for (i = 0; i < ARRAY_SIZE(common_cmds); i++) {
  30                 printf("   %-*s   ", longest, common_cmds[i].name);
  31                 puts(common_cmds[i].help);
  32         }
  33 }
  34
  35 static void kvm_help(void)
  36 {
  37         printf("\n usage: %s\n\n", kvm_usage_string);
  38         list_common_cmds_help();
  39         printf("\n %s\n\n", kvm_more_info_string);
  40 }
  41
  42
  43 static void help_cmd(const char *cmd)
  44 {
  45         struct cmd_struct *p;
  46         p = kvm_get_command(kvm_commands, cmd);
  47         if (!p)
  48                 kvm_help();
  49         else if (p->help)
  50                 p->help();
  51 }
  52
  53 int kvm_cmd_help(int argc, const char **argv, const char *prefix)
  54 {
  55         if (!argv || !*argv) {
  56                 kvm_help();
  57                 return 0;
  58         }
  59         help_cmd(argv[0]);
  60         return 0;
  61 }