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1 | /** @file\r |
2 | Glue code that contains the EFI entry point and converts it to an EBL \r | |
3 | ASCII Argc, Argv sytle entry point\r | |
4 | \r | |
5 | \r | |
60274cca HT |
6 | Copyright (c) 2007, Intel Corporation. All rights reserved.<BR>\r |
7 | Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>\r | |
2ef2b01e | 8 | \r |
60274cca | 9 | This program and the accompanying materials\r |
2ef2b01e A |
10 | are licensed and made available under the terms and conditions of the BSD License\r |
11 | which accompanies this distribution. The full text of the license may be found at\r | |
12 | http://opensource.org/licenses/bsd-license.php\r | |
13 | \r | |
14 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
15 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
16 | \r | |
17 | \r | |
18 | **/\r | |
19 | \r | |
20 | #define CMD_SEPERATOR ';'\r | |
21 | #define MAX_ARGS 32\r | |
22 | \r | |
23 | EFI_STATUS\r | |
24 | EblMain (\r | |
25 | IN UINTN Argc,\r | |
26 | IN CHAR8 **Argv\r | |
27 | );\r | |
28 | \r | |
29 | \r | |
30 | ///\r | |
31 | /// EdkExternCmdEntry() & ParseArguments() convert the standard EFI entry point\r | |
32 | /// into Argc, Argv form that calls EblMain().\r | |
33 | ///\r | |
34 | \r | |
35 | \r | |
36 | /**\r | |
37 | Parse the CmdLine and break it up into Argc (arg count) and Argv (array of\r | |
38 | pointers to each argument). The Cmd buffer is altered and seperators are \r | |
39 | converted to string terminators. This allows Argv to point into CmdLine.\r | |
40 | A CmdLine can support multiple commands. The next command in the command line\r | |
41 | is returned if it exists.\r | |
42 | \r | |
43 | @param CmdLine String to parse for a set of commands\r | |
44 | @param CmdLineSize Size of CmdLine in bytes\r | |
45 | @param Argc Returns the number of arguments in the CmdLine current command\r | |
46 | @param Argv Argc pointers to each string in CmdLine\r | |
47 | \r | |
48 | @return Next Command in the command line or NULL if non exists\r | |
49 | **/\r | |
50 | VOID\r | |
51 | ParseArguments (\r | |
52 | IN CHAR8 *CmdLine,\r | |
53 | IN UINTN CmdLineSize,\r | |
54 | OUT UINTN *Argc,\r | |
55 | OUT CHAR8 **Argv\r | |
56 | )\r | |
57 | {\r | |
58 | UINTN Arg;\r | |
59 | CHAR8 *Char;\r | |
60 | BOOLEAN LookingForArg;\r | |
61 | BOOLEAN InQuote;\r | |
62 | UINTN Index;\r | |
63 | \r | |
64 | *Argc = 0;\r | |
65 | if ((CmdLineSize == 0) || (AsciiStrLen (CmdLine) == 0)) {\r | |
66 | // basic error checking failed on the arguments\r | |
67 | return;\r | |
68 | }\r | |
69 | \r | |
70 | // Walk a single command line. A CMD_SEPERATOR allows mult commands on a single line\r | |
71 | InQuote = FALSE;\r | |
72 | LookingForArg = TRUE;\r | |
73 | for (Char = CmdLine, Arg = 0, Index = 0; *Char != '\0' && *Char != CMD_SEPERATOR; Char++, Index++) {\r | |
74 | // Perform any text coversion here\r | |
75 | if (*Char == '\t') {\r | |
76 | // TAB to space\r | |
77 | *Char = ' ';\r | |
78 | }\r | |
79 | \r | |
80 | if (LookingForArg) {\r | |
81 | // Look for the beging of an Argv[] entry\r | |
82 | if (*Char == '"') {\r | |
83 | Argv[Arg++] = ++Char;\r | |
84 | LookingForArg = FALSE;\r | |
85 | InQuote = TRUE;\r | |
86 | } else if (*Char != ' ') {\r | |
87 | Argv[Arg++] = Char;\r | |
88 | LookingForArg = FALSE;\r | |
89 | } \r | |
90 | } else {\r | |
91 | // Looking for the terminator of an Argv[] entry\r | |
92 | if ((InQuote && (*Char == '"')) || (!InQuote && (*Char == ' '))) {\r | |
93 | *Char = '\0';\r | |
94 | LookingForArg = TRUE;\r | |
95 | }\r | |
96 | }\r | |
97 | \r | |
98 | if ((Arg >= MAX_ARGS) || (Index > CmdLineSize)) {\r | |
99 | // Error check buffer and exit since it does not look valid\r | |
100 | break;\r | |
101 | }\r | |
102 | }\r | |
103 | \r | |
104 | *Argc = Arg;\r | |
105 | \r | |
106 | if (*Char == CMD_SEPERATOR) {\r | |
107 | // Replace the command delimeter with null\r | |
108 | *Char = '\0';\r | |
109 | }\r | |
110 | \r | |
111 | return;\r | |
112 | }\r | |
113 | \r | |
114 | \r | |
115 | \r | |
116 | \r | |
117 | /**\r | |
118 | Embedded Boot Loader (EBL) - A simple EFI command line application for embedded \r | |
119 | devices. PcdEmbeddedAutomaticBootCommand is a complied in commnad line that\r | |
120 | gets executed automatically. The ; seperator allows multiple commands \r | |
121 | for each command line.\r | |
122 | \r | |
123 | @param ImageHandle EFI ImageHandle for this application.\r | |
124 | @param SystemTable EFI system table\r | |
125 | \r | |
126 | @return EFI status of the applicaiton\r | |
127 | \r | |
128 | **/\r | |
129 | EFI_STATUS\r | |
130 | EFIAPI\r | |
131 | EdkExternCmdEntry (\r | |
132 | IN EFI_HANDLE ImageHandle,\r | |
133 | IN EFI_SYSTEM_TABLE *SystemTable\r | |
134 | ) \r | |
135 | {\r | |
136 | EFI_STATUS Status;\r | |
137 | EFI_LOADED_IMAGE_PROTOCOL *ImageInfo;\r | |
138 | UINTN Argc;\r | |
139 | CHAR8 *Argv[MAX_ARGS];\r | |
140 | \r | |
141 | Status = gBS->HandleProtocol (ImageHandle, &gEfiLoadedImageProtocolGuid, (VOID **)&ImageInfo);\r | |
142 | if (EFI_ERROR (Status)) {\r | |
143 | Argc = 0;\r | |
144 | } else {\r | |
145 | // Looks like valid commands were passed in. \r | |
146 | ParseArguments (ImageInfo->LoadOptions, ImageInfo->LoadOptionsSize, &Argc, Argv);\r | |
147 | }\r | |
148 | \r | |
149 | return EblMain (Argc, Argv);\r | |
150 | }\r | |
151 | \r | |
152 | \r |