reactos/boot/freeldr/freeldr/cmdline.c

   1 /*
   2  * PROJECT:         ReactOS Boot Loader
   3  * LICENSE:         BSD - See COPYING.ARM in the top level directory
   4  * FILE:            boot/freeldr/cmdline.c
   5  * PURPOSE:         FreeLDR Command Line Parsing
   6  * PROGRAMMERS:     ReactOS Portable Systems Group
   7  */
   8
   9 /* INCLUDES *******************************************************************/
  10
  11 #include <freeldr.h>
  12
  13 /* GLOBALS ********************************************************************/
  14
  15 typedef struct tagCMDLINEINFO
  16 {
  17     const char *DefaultOperatingSystem;
  18     LONG TimeOut;
  19 } CMDLINEINFO, *PCMDLINEINFO;
  20
  21 CCHAR DefaultOs[256];
  22 CMDLINEINFO CmdLineInfo;
  23
  24 /* FUNCTIONS ******************************************************************/
  25
  26 VOID
  27 CmdLineParse(IN PCHAR CmdLine)
  28 {
  29     PCHAR End, Setting;
  30     ULONG_PTR Length, Offset = 0;
  31
  32     /* Set defaults */
  33     CmdLineInfo.DefaultOperatingSystem = NULL;
  34     CmdLineInfo.TimeOut = -1;
  35
  36     /* Get timeout */
  37     Setting = strstr(CmdLine, "timeout=");
  38     if (Setting) CmdLineInfo.TimeOut = atoi(Setting +
  39                                             sizeof("timeout=") +
  40                                             sizeof(ANSI_NULL));
  41
  42     /* Get default OS */
  43     Setting = strstr(CmdLine, "defaultos=");
  44     if (Setting)
  45     {
  46         /* Check if there's more command-line parameters following */
  47         Setting += sizeof("defaultos=") + sizeof(ANSI_NULL);
  48         End = strstr(Setting, " ");
  49         if (End)
  50             Length = End - Setting;
  51         else
  52             Length = sizeof(DefaultOs);
  53
  54         /* Copy the default OS */
  55         strncpy(DefaultOs, Setting, Length);
  56         CmdLineInfo.DefaultOperatingSystem = DefaultOs;
  57     }
  58
  59     /* Get ramdisk base address */
  60     Setting = strstr(CmdLine, "rdbase=");
  61     if (Setting) gRamDiskBase = (PVOID)(ULONG_PTR)strtoull(Setting +
  62                                                sizeof("rdbase=") -
  63                                                sizeof(ANSI_NULL),
  64                                                NULL,
  65                                                0);
  66
  67     /* Get ramdisk size */
  68     Setting = strstr(CmdLine, "rdsize=");
  69     if (Setting) gRamDiskSize = strtoul(Setting +
  70                                         sizeof("rdsize=") -
  71                                         sizeof(ANSI_NULL),
  72                                         NULL,
  73                                         0);
  74
  75     /* Get ramdisk offset */
  76     Setting = strstr(CmdLine, "rdoffset=");
  77     if (Setting) Offset = strtoul(Setting +
  78                                   sizeof("rdoffset=") -
  79                                   sizeof(ANSI_NULL),
  80                                   NULL,
  81                                   0);
  82
  83     /* Fix it up */
  84     gRamDiskBase = (PVOID)((ULONG_PTR)gRamDiskBase + Offset);
  85 }
  86
  87 PCCH
  88 CmdLineGetDefaultOS(VOID)
  89 {
  90     return CmdLineInfo.DefaultOperatingSystem;
  91 }
  92
  93 LONG
  94 CmdLineGetTimeOut(VOID)
  95 {
  96     return CmdLineInfo.TimeOut;
  97 }