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 CCHAR DefaultOs[256];
  16 CMDLINEINFO CmdLineInfo;
  17
  18 /* FUNCTIONS ******************************************************************/
  19
  20 VOID
  21 CmdLineParse(IN PCHAR CmdLine)
  22 {
  23     PCHAR End, Setting;
  24     ULONG_PTR Length, Offset = 0;
  25
  26     //
  27     // Set defaults
  28     //
  29     CmdLineInfo.DefaultOperatingSystem = NULL;
  30     CmdLineInfo.TimeOut = -1;
  31
  32     //
  33     // Get timeout
  34     //
  35     Setting = strstr(CmdLine, "timeout=");
  36     if (Setting) CmdLineInfo.TimeOut = atoi(Setting +
  37                                             sizeof("timeout=") +
  38                                             sizeof(ANSI_NULL));
  39
  40     //
  41     // Get default OS
  42     //
  43     Setting = strstr(CmdLine, "defaultos=");
  44     if (Setting)
  45     {
  46         //
  47         // Check if there's more command-line parameters following
  48         //
  49         Setting += sizeof("defaultos=") + sizeof(ANSI_NULL);
  50         End = strstr(Setting, " ");
  51         if (End) Length = End - Setting; else Length = sizeof(DefaultOs);
  52
  53         //
  54         // Copy the default OS
  55         //
  56         strncpy(DefaultOs, Setting, Length);
  57         CmdLineInfo.DefaultOperatingSystem = DefaultOs;
  58     }
  59
  60     //
  61     // Get ramdisk base address
  62     //
  63     Setting = strstr(CmdLine, "rdbase=");
  64     if (Setting) gRamDiskBase = (PVOID)(ULONG_PTR)strtoull(Setting +
  65                                                sizeof("rdbase=") -
  66                                                sizeof(ANSI_NULL),
  67                                                NULL,
  68                                                0);
  69
  70     //
  71     // Get ramdisk size
  72     //
  73     Setting = strstr(CmdLine, "rdsize=");
  74     if (Setting) gRamDiskSize = strtoul(Setting +
  75                                         sizeof("rdsize=") -
  76                                         sizeof(ANSI_NULL),
  77                                         NULL,
  78                                         0);
  79
  80     //
  81     // Get ramdisk offset
  82     //
  83     Setting = strstr(CmdLine, "rdoffset=");
  84     if (Setting) Offset = strtoul(Setting +
  85                                   sizeof("rdoffset=") -
  86                                   sizeof(ANSI_NULL),
  87                                   NULL,
  88                                   0);
  89
  90     //
  91     // Fix it up
  92     //
  93     gRamDiskBase = (PVOID)((ULONG_PTR)gRamDiskBase + Offset);
  94 }
  95
  96 PCCH
  97 CmdLineGetDefaultOS(VOID)
  98 {
  99     return CmdLineInfo.DefaultOperatingSystem;
 100 }
 101
 102 LONG
 103 CmdLineGetTimeOut(VOID)
 104 {
 105     return CmdLineInfo.TimeOut;
 106 }