src/hci/commands/sanboot_cmd.c

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include <getopt.h>
   4 #include <gpxe/command.h>
   5 #include <usr/autoboot.h>
   6
   7 FILE_LICENCE ( GPL2_OR_LATER );
   8
   9 /**
  10  * "sanboot" command syntax message
  11  *
  12  * @v argv              Argument list
  13  */
  14 static void sanboot_syntax ( char **argv ) {
  15         printf ( "Usage:\n"
  16                  "  %s <root-path>\n"
  17                  "\n"
  18                  "Boot from SAN target\n",
  19                  argv[0] );
  20 }
  21
  22 /**
  23  * The "sanboot" command
  24  *
  25  * @v argc              Argument count
  26  * @v argv              Argument list
  27  * @ret rc              Exit code
  28  */
  29 static int sanboot_exec ( int argc, char **argv ) {
  30         static struct option longopts[] = {
  31                 { "help", 0, NULL, 'h' },
  32                 { NULL, 0, NULL, 0 },
  33         };
  34         const char *root_path = NULL;
  35         int c;
  36         int rc;
  37
  38         /* Parse options */
  39         while ( ( c = getopt_long ( argc, argv, "h", longopts, NULL ) ) >= 0 ){
  40                 switch ( c ) {
  41                 case 'h':
  42                         /* Display help text */
  43                 default:
  44                         /* Unrecognised/invalid option */
  45                         sanboot_syntax ( argv );
  46                         return 1;
  47                 }
  48         }
  49
  50         /* Need exactly one image name remaining after the options */
  51         if ( optind != ( argc - 1 ) ) {
  52                 sanboot_syntax ( argv );
  53                 return 1;
  54         }
  55         root_path = argv[optind];
  56
  57         /* Boot from root path */
  58         if ( ( rc = boot_root_path ( root_path ) ) != 0 ) {
  59                 printf ( "Could not boot from %s: %s\n",
  60                          root_path, strerror ( rc ) );
  61                 return 1;
  62         }
  63
  64         return 0;
  65 }
  66
  67 struct command sanboot_command __command = {
  68         .name = "sanboot",
  69         .exec = sanboot_exec,
  70 };