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/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     PCCH DebugString;
  18     PCCH DefaultOperatingSystem;
  19     LONG TimeOut;
  20 } CMDLINEINFO, *PCMDLINEINFO;
  21
  22 CCHAR DebugString[256];
  23 CCHAR DefaultOs[256];
  24 CMDLINEINFO CmdLineInfo;
  25
  26 /* FUNCTIONS ******************************************************************/
  27
  28 VOID
  29 CmdLineParse(IN PCCH CmdLine)
  30 {
  31     PCHAR End, Setting;
  32     ULONG_PTR Length, Offset = 0;
  33
  34     /* Set defaults */
  35     CmdLineInfo.DebugString = NULL;
  36     CmdLineInfo.DefaultOperatingSystem = NULL;
  37     CmdLineInfo.TimeOut = -1;
  38
  39     /*
  40      * Get debug string, in the following format:
  41      * "debug=option1=XXX;option2=YYY;..."
  42      * and translate it into the format:
  43      * "OPTION1=XXX OPTION2=YYY ..."
  44      */
  45     Setting = strstr(CmdLine, "debug=");
  46     if (Setting)
  47     {
  48         /* Check if there are more command-line parameters following */
  49         Setting += sizeof("debug=") + sizeof(ANSI_NULL);
  50         End = strstr(Setting, " ");
  51         if (End)
  52             Length = End - Setting;
  53         else
  54             Length = sizeof(DebugString);
  55
  56         /* Copy the debug string and upcase it */
  57         strncpy(DebugString, Setting, Length);
  58         DebugString[Length - 1] = ANSI_NULL;
  59         _strupr(DebugString);
  60
  61         /* Replace all separators ';' by spaces */
  62         Setting = DebugString;
  63         while (*Setting)
  64         {
  65             if (*Setting == ';') *Setting = ' ';
  66             Setting++;
  67         }
  68
  69         CmdLineInfo.DebugString = DebugString;
  70     }
  71
  72     /* Get timeout */
  73     Setting = strstr(CmdLine, "timeout=");
  74     if (Setting) CmdLineInfo.TimeOut = atoi(Setting +
  75                                             sizeof("timeout=") +
  76                                             sizeof(ANSI_NULL));
  77
  78     /* Get default OS */
  79     Setting = strstr(CmdLine, "defaultos=");
  80     if (Setting)
  81     {
  82         /* Check if there are more command-line parameters following */
  83         Setting += sizeof("defaultos=") + sizeof(ANSI_NULL);
  84         End = strstr(Setting, " ");
  85         if (End)
  86             Length = End - Setting;
  87         else
  88             Length = sizeof(DefaultOs);
  89
  90         /* Copy the default OS */
  91         strncpy(DefaultOs, Setting, Length);
  92         DefaultOs[Length - 1] = ANSI_NULL;
  93         CmdLineInfo.DefaultOperatingSystem = DefaultOs;
  94     }
  95
  96     /* Get ramdisk base address */
  97     Setting = strstr(CmdLine, "rdbase=");
  98     if (Setting) gRamDiskBase = (PVOID)(ULONG_PTR)strtoull(Setting +
  99                                                sizeof("rdbase=") -
 100                                                sizeof(ANSI_NULL),
 101                                                NULL,
 102                                                0);
 103
 104     /* Get ramdisk size */
 105     Setting = strstr(CmdLine, "rdsize=");
 106     if (Setting) gRamDiskSize = strtoul(Setting +
 107                                         sizeof("rdsize=") -
 108                                         sizeof(ANSI_NULL),
 109                                         NULL,
 110                                         0);
 111
 112     /* Get ramdisk offset */
 113     Setting = strstr(CmdLine, "rdoffset=");
 114     if (Setting) Offset = strtoul(Setting +
 115                                   sizeof("rdoffset=") -
 116                                   sizeof(ANSI_NULL),
 117                                   NULL,
 118                                   0);
 119
 120     /* Fix it up */
 121     gRamDiskBase = (PVOID)((ULONG_PTR)gRamDiskBase + Offset);
 122 }
 123
 124 PCCH
 125 CmdLineGetDebugString(VOID)
 126 {
 127     return CmdLineInfo.DebugString;
 128 }
 129
 130 PCCH
 131 CmdLineGetDefaultOS(VOID)
 132 {
 133     return CmdLineInfo.DefaultOperatingSystem;
 134 }
 135
 136 LONG
 137 CmdLineGetTimeOut(VOID)
 138 {
 139     return CmdLineInfo.TimeOut;
 140 }