com32/modules/sanboot.c

   1 /* ----------------------------------------------------------------------- *
   2  *
   3  *   Copyright 2008 H. Peter Anvin - All Rights Reserved
   4  *
   5  *   This program is free software; you can redistribute it and/or modify
   6  *   it under the terms of the GNU General Public License as published by
   7  *   the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
   8  *   Boston MA 02110-1301, USA; either version 2 of the License, or
   9  *   (at your option) any later version; incorporated herein by reference.
  10  *
  11  * ----------------------------------------------------------------------- */
  12
  13 /*
  14  * sanboot.c
  15  *
  16  * Invoke the gPXE "sanboot" command, if available.
  17  */
  18
  19 #include <alloca.h>
  20 #include <inttypes.h>
  21 #include <stdio.h>
  22 #include <console.h>
  23 #include <com32.h>
  24 #include <string.h>
  25
  26 #include <sys/gpxe.h>
  27 #include <syslinux/pxe_api.h>
  28
  29 struct segoff16 {
  30     uint16_t offs, seg;
  31 };
  32
  33 struct s_PXENV_FILE_EXEC {
  34     uint16_t Status;
  35     struct segoff16 Command;
  36 };
  37
  38 static void sanboot(const char **args)
  39 {
  40     char *q;
  41     struct s_PXENV_FILE_EXEC *fx;
  42
  43     fx = lmalloc(sizeof *fx);
  44     if (!fx)
  45         return;
  46
  47     q = (char *)(fx + 1);
  48
  49     fx->Status = 1;
  50     fx->Command.offs = OFFS(q);
  51     fx->Command.seg = SEG(q);
  52
  53     q = stpcpy(q, "sanboot");
  54
  55     while (*args) {
  56         *q++ = ' ';
  57         q = stpcpy(q, *args);
  58         args++;
  59     }
  60
  61     pxe_call(PXENV_FILE_EXEC, fx);
  62
  63     /* This should not return... */
  64 }
  65
  66 int main(int argc, const char *argv[])
  67 {
  68     if (argc < 2) {
  69         printf("Usage: sanboot rootpath\n");
  70         return 1;
  71     }
  72
  73     if (!is_gpxe()) {
  74         printf("sanboot: gPXE API not detected\n");
  75         return 1;
  76     }
  77
  78     sanboot(argv + 1);
  79
  80     /* sanboot() should not return... */
  81     printf("SAN boot failed.\n");
  82     return 1;
  83 }