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a405b86d | 1 | /** @file\r |
2 | function declarations for shell environment functions.\r | |
3 | \r | |
b62bb885 | 4 | Copyright (c) 2009 - 2016, Intel Corporation. All rights reserved.<BR>\r |
a405b86d | 5 | This program and the accompanying materials\r |
6 | are licensed and made available under the terms and conditions of the BSD License\r | |
7 | which accompanies this distribution. The full text of the license may be found at\r | |
8 | http://opensource.org/licenses/bsd-license.php\r | |
9 | \r | |
10 | THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,\r | |
11 | WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.\r | |
12 | \r | |
13 | **/\r | |
14 | \r | |
0406a571 | 15 | #include "Shell.h"\r |
a405b86d | 16 | \r |
654a012b QS |
17 | #define INIT_NAME_BUFFER_SIZE 128\r |
18 | #define INIT_DATA_BUFFER_SIZE 1024\r | |
19 | \r | |
b62bb885 QS |
20 | //\r |
21 | // The list is used to cache the environment variables.\r | |
22 | //\r | |
23 | ENV_VAR_LIST gShellEnvVarList;\r | |
24 | \r | |
a405b86d | 25 | /**\r |
26 | Reports whether an environment variable is Volatile or Non-Volatile.\r | |
27 | \r | |
28 | @param EnvVarName The name of the environment variable in question\r | |
31e5b912 | 29 | @param Volatile Return TRUE if the environment variable is volatile\r |
a405b86d | 30 | \r |
31e5b912 RN |
31 | @retval EFI_SUCCESS The volatile attribute is returned successfully\r |
32 | @retval others Some errors happened.\r | |
a405b86d | 33 | **/\r |
31e5b912 | 34 | EFI_STATUS\r |
a405b86d | 35 | IsVolatileEnv (\r |
31e5b912 RN |
36 | IN CONST CHAR16 *EnvVarName,\r |
37 | OUT BOOLEAN *Volatile\r | |
a405b86d | 38 | )\r |
39 | {\r | |
40 | EFI_STATUS Status;\r | |
41 | UINTN Size;\r | |
42 | VOID *Buffer;\r | |
43 | UINT32 Attribs;\r | |
44 | \r | |
31e5b912 RN |
45 | ASSERT (Volatile != NULL);\r |
46 | \r | |
a405b86d | 47 | Size = 0;\r |
48 | Buffer = NULL;\r | |
49 | \r | |
50 | //\r | |
51 | // get the variable\r | |
52 | //\r | |
53 | Status = gRT->GetVariable((CHAR16*)EnvVarName,\r | |
54 | &gShellVariableGuid,\r | |
55 | &Attribs,\r | |
56 | &Size,\r | |
57 | Buffer);\r | |
58 | if (Status == EFI_BUFFER_TOO_SMALL) {\r | |
733f138d | 59 | Buffer = AllocateZeroPool(Size);\r |
31e5b912 RN |
60 | if (Buffer == NULL) {\r |
61 | return EFI_OUT_OF_RESOURCES;\r | |
62 | }\r | |
a405b86d | 63 | Status = gRT->GetVariable((CHAR16*)EnvVarName,\r |
64 | &gShellVariableGuid,\r | |
65 | &Attribs,\r | |
66 | &Size,\r | |
67 | Buffer);\r | |
68 | FreePool(Buffer);\r | |
69 | }\r | |
70 | //\r | |
71 | // not found means volatile\r | |
72 | //\r | |
73 | if (Status == EFI_NOT_FOUND) {\r | |
31e5b912 RN |
74 | *Volatile = TRUE;\r |
75 | return EFI_SUCCESS;\r | |
a405b86d | 76 | }\r |
31e5b912 RN |
77 | if (EFI_ERROR (Status)) {\r |
78 | return Status;\r | |
a405b86d | 79 | }\r |
80 | \r | |
81 | //\r | |
31e5b912 | 82 | // check for the Non Volatile bit\r |
a405b86d | 83 | //\r |
31e5b912 RN |
84 | *Volatile = !(BOOLEAN) ((Attribs & EFI_VARIABLE_NON_VOLATILE) == EFI_VARIABLE_NON_VOLATILE);\r |
85 | return EFI_SUCCESS;\r | |
a405b86d | 86 | }\r |
87 | \r | |
88 | /**\r | |
89 | free function for ENV_VAR_LIST objects.\r | |
90 | \r | |
91 | @param[in] List The pointer to pointer to list.\r | |
92 | **/\r | |
93 | VOID\r | |
a405b86d | 94 | FreeEnvironmentVariableList(\r |
95 | IN LIST_ENTRY *List\r | |
96 | )\r | |
97 | {\r | |
98 | ENV_VAR_LIST *Node;\r | |
99 | \r | |
100 | ASSERT (List != NULL);\r | |
101 | if (List == NULL) {\r | |
102 | return;\r | |
103 | }\r | |
104 | \r | |
105 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(List)\r | |
3f869579 | 106 | ; !IsListEmpty(List)\r |
a405b86d | 107 | ; Node = (ENV_VAR_LIST*)GetFirstNode(List)\r |
108 | ){\r | |
109 | ASSERT(Node != NULL);\r | |
110 | RemoveEntryList(&Node->Link);\r | |
111 | if (Node->Key != NULL) {\r | |
112 | FreePool(Node->Key);\r | |
113 | }\r | |
114 | if (Node->Val != NULL) {\r | |
115 | FreePool(Node->Val);\r | |
116 | }\r | |
117 | FreePool(Node);\r | |
118 | }\r | |
119 | }\r | |
120 | \r | |
121 | /**\r | |
122 | Creates a list of all Shell-Guid-based environment variables.\r | |
123 | \r | |
4ff7e37b ED |
124 | @param[in, out] ListHead The pointer to pointer to LIST ENTRY object for\r |
125 | storing this list.\r | |
a405b86d | 126 | \r |
127 | @retval EFI_SUCCESS the list was created sucessfully.\r | |
128 | **/\r | |
129 | EFI_STATUS\r | |
a405b86d | 130 | GetEnvironmentVariableList(\r |
131 | IN OUT LIST_ENTRY *ListHead\r | |
132 | )\r | |
133 | {\r | |
134 | CHAR16 *VariableName;\r | |
135 | UINTN NameSize;\r | |
654a012b | 136 | UINTN NameBufferSize;\r |
a405b86d | 137 | EFI_STATUS Status;\r |
138 | EFI_GUID Guid;\r | |
139 | UINTN ValSize;\r | |
654a012b | 140 | UINTN ValBufferSize;\r |
a405b86d | 141 | ENV_VAR_LIST *VarList;\r |
142 | \r | |
3c865f20 | 143 | if (ListHead == NULL) {\r |
144 | return (EFI_INVALID_PARAMETER);\r | |
145 | }\r | |
654a012b QS |
146 | \r |
147 | Status = EFI_SUCCESS;\r | |
148 | \r | |
149 | ValBufferSize = INIT_DATA_BUFFER_SIZE;\r | |
150 | NameBufferSize = INIT_NAME_BUFFER_SIZE;\r | |
151 | VariableName = AllocateZeroPool(NameBufferSize);\r | |
3c865f20 | 152 | if (VariableName == NULL) {\r |
153 | return (EFI_OUT_OF_RESOURCES);\r | |
154 | }\r | |
7f79b01e | 155 | *VariableName = CHAR_NULL;\r |
a405b86d | 156 | \r |
3c865f20 | 157 | while (!EFI_ERROR(Status)) {\r |
654a012b | 158 | NameSize = NameBufferSize;\r |
a405b86d | 159 | Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);\r |
160 | if (Status == EFI_NOT_FOUND){\r | |
161 | Status = EFI_SUCCESS;\r | |
162 | break;\r | |
654a012b QS |
163 | } else if (Status == EFI_BUFFER_TOO_SMALL) {\r |
164 | NameBufferSize = NameSize > NameBufferSize * 2 ? NameSize : NameBufferSize * 2;\r | |
165 | SHELL_FREE_NON_NULL(VariableName);\r | |
166 | VariableName = AllocateZeroPool(NameBufferSize);\r | |
167 | if (VariableName == NULL) {\r | |
168 | Status = EFI_OUT_OF_RESOURCES;\r | |
169 | break;\r | |
170 | }\r | |
171 | NameSize = NameBufferSize;\r | |
172 | Status = gRT->GetNextVariableName(&NameSize, VariableName, &Guid);\r | |
a405b86d | 173 | }\r |
654a012b | 174 | \r |
3c865f20 | 175 | if (!EFI_ERROR(Status) && CompareGuid(&Guid, &gShellVariableGuid)){\r |
a405b86d | 176 | VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r |
8be0ba36 | 177 | if (VarList == NULL) {\r |
178 | Status = EFI_OUT_OF_RESOURCES;\r | |
179 | } else {\r | |
654a012b | 180 | ValSize = ValBufferSize;\r |
c5c994c5 CC |
181 | //\r |
182 | // We need another CHAR16 to save '\0' in VarList->Val.\r | |
183 | //\r | |
184 | VarList->Val = AllocateZeroPool (ValSize + sizeof (CHAR16));\r | |
654a012b QS |
185 | if (VarList->Val == NULL) {\r |
186 | SHELL_FREE_NON_NULL(VarList);\r | |
187 | Status = EFI_OUT_OF_RESOURCES;\r | |
188 | break;\r | |
189 | }\r | |
a405b86d | 190 | Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);\r |
8be0ba36 | 191 | if (Status == EFI_BUFFER_TOO_SMALL){\r |
654a012b QS |
192 | ValBufferSize = ValSize > ValBufferSize * 2 ? ValSize : ValBufferSize * 2;\r |
193 | SHELL_FREE_NON_NULL (VarList->Val);\r | |
c5c994c5 CC |
194 | //\r |
195 | // We need another CHAR16 to save '\0' in VarList->Val.\r | |
196 | //\r | |
197 | VarList->Val = AllocateZeroPool (ValBufferSize + sizeof (CHAR16));\r | |
8be0ba36 | 198 | if (VarList->Val == NULL) {\r |
199 | SHELL_FREE_NON_NULL(VarList);\r | |
200 | Status = EFI_OUT_OF_RESOURCES;\r | |
654a012b | 201 | break;\r |
8be0ba36 | 202 | }\r |
654a012b QS |
203 | \r |
204 | ValSize = ValBufferSize;\r | |
205 | Status = SHELL_GET_ENVIRONMENT_VARIABLE_AND_ATTRIBUTES(VariableName, &VarList->Atts, &ValSize, VarList->Val);\r | |
8be0ba36 | 206 | }\r |
654a012b | 207 | if (!EFI_ERROR(Status)) {\r |
7f79b01e | 208 | VarList->Key = AllocateCopyPool(StrSize(VariableName), VariableName);\r |
8be0ba36 | 209 | if (VarList->Key == NULL) {\r |
210 | SHELL_FREE_NON_NULL(VarList->Val);\r | |
211 | SHELL_FREE_NON_NULL(VarList);\r | |
212 | Status = EFI_OUT_OF_RESOURCES;\r | |
213 | } else {\r | |
8be0ba36 | 214 | InsertTailList(ListHead, &VarList->Link);\r |
215 | }\r | |
654a012b QS |
216 | } else {\r |
217 | SHELL_FREE_NON_NULL(VarList->Val);\r | |
218 | SHELL_FREE_NON_NULL(VarList);\r | |
8be0ba36 | 219 | }\r |
654a012b | 220 | } // if (VarList == NULL) ... else ...\r |
a405b86d | 221 | } // compare guid\r |
222 | } // while\r | |
654a012b | 223 | SHELL_FREE_NON_NULL (VariableName);\r |
a405b86d | 224 | \r |
225 | if (EFI_ERROR(Status)) {\r | |
226 | FreeEnvironmentVariableList(ListHead);\r | |
227 | }\r | |
228 | \r | |
229 | return (Status);\r | |
230 | }\r | |
231 | \r | |
232 | /**\r | |
233 | Sets a list of all Shell-Guid-based environment variables. this will\r | |
234 | also eliminate all existing shell environment variables (even if they\r | |
235 | are not on the list).\r | |
236 | \r | |
237 | This function will also deallocate the memory from List.\r | |
238 | \r | |
239 | @param[in] ListHead The pointer to LIST_ENTRY from\r | |
240 | GetShellEnvVarList().\r | |
241 | \r | |
242 | @retval EFI_SUCCESS the list was Set sucessfully.\r | |
243 | **/\r | |
244 | EFI_STATUS\r | |
a405b86d | 245 | SetEnvironmentVariableList(\r |
246 | IN LIST_ENTRY *ListHead\r | |
247 | )\r | |
248 | {\r | |
249 | ENV_VAR_LIST VarList;\r | |
250 | ENV_VAR_LIST *Node;\r | |
251 | EFI_STATUS Status;\r | |
252 | UINTN Size;\r | |
253 | \r | |
254 | InitializeListHead(&VarList.Link);\r | |
255 | \r | |
256 | //\r | |
257 | // Delete all the current environment variables\r | |
258 | //\r | |
259 | Status = GetEnvironmentVariableList(&VarList.Link);\r | |
260 | ASSERT_EFI_ERROR(Status);\r | |
261 | \r | |
262 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(&VarList.Link)\r | |
263 | ; !IsNull(&VarList.Link, &Node->Link)\r | |
264 | ; Node = (ENV_VAR_LIST*)GetNextNode(&VarList.Link, &Node->Link)\r | |
265 | ){\r | |
266 | if (Node->Key != NULL) {\r | |
267 | Status = SHELL_DELETE_ENVIRONMENT_VARIABLE(Node->Key);\r | |
268 | }\r | |
269 | ASSERT_EFI_ERROR(Status);\r | |
270 | }\r | |
271 | \r | |
272 | FreeEnvironmentVariableList(&VarList.Link);\r | |
273 | \r | |
274 | //\r | |
275 | // set all the variables fron the list\r | |
276 | //\r | |
277 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(ListHead)\r | |
278 | ; !IsNull(ListHead, &Node->Link)\r | |
279 | ; Node = (ENV_VAR_LIST*)GetNextNode(ListHead, &Node->Link)\r | |
280 | ){\r | |
c5c994c5 | 281 | Size = StrSize (Node->Val) - sizeof (CHAR16);\r |
a405b86d | 282 | if (Node->Atts & EFI_VARIABLE_NON_VOLATILE) {\r |
283 | Status = SHELL_SET_ENVIRONMENT_VARIABLE_NV(Node->Key, Size, Node->Val);\r | |
284 | } else {\r | |
285 | Status = SHELL_SET_ENVIRONMENT_VARIABLE_V (Node->Key, Size, Node->Val);\r | |
286 | }\r | |
287 | ASSERT_EFI_ERROR(Status);\r | |
288 | }\r | |
289 | FreeEnvironmentVariableList(ListHead);\r | |
290 | \r | |
291 | return (Status);\r | |
292 | }\r | |
293 | \r | |
294 | /**\r | |
295 | sets a list of all Shell-Guid-based environment variables.\r | |
296 | \r | |
297 | @param Environment Points to a NULL-terminated array of environment\r | |
298 | variables with the format 'x=y', where x is the\r | |
299 | environment variable name and y is the value.\r | |
300 | \r | |
301 | @retval EFI_SUCCESS The command executed successfully.\r | |
302 | @retval EFI_INVALID_PARAMETER The parameter is invalid.\r | |
303 | @retval EFI_OUT_OF_RESOURCES Out of resources.\r | |
304 | \r | |
305 | @sa SetEnvironmentVariableList\r | |
306 | **/\r | |
307 | EFI_STATUS\r | |
a405b86d | 308 | SetEnvironmentVariables(\r |
309 | IN CONST CHAR16 **Environment\r | |
310 | )\r | |
311 | {\r | |
312 | CONST CHAR16 *CurrentString;\r | |
313 | UINTN CurrentCount;\r | |
314 | ENV_VAR_LIST *VarList;\r | |
315 | ENV_VAR_LIST *Node;\r | |
a405b86d | 316 | \r |
317 | VarList = NULL;\r | |
318 | \r | |
319 | if (Environment == NULL) {\r | |
320 | return (EFI_INVALID_PARAMETER);\r | |
321 | }\r | |
322 | \r | |
323 | //\r | |
324 | // Build a list identical to the ones used for get/set list functions above\r | |
325 | //\r | |
326 | for ( CurrentCount = 0\r | |
327 | ;\r | |
328 | ; CurrentCount++\r | |
329 | ){\r | |
330 | CurrentString = Environment[CurrentCount];\r | |
331 | if (CurrentString == NULL) {\r | |
332 | break;\r | |
333 | }\r | |
334 | ASSERT(StrStr(CurrentString, L"=") != NULL);\r | |
733f138d | 335 | Node = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r |
7f79b01e JC |
336 | if (Node == NULL) {\r |
337 | SetEnvironmentVariableList(&VarList->Link);\r | |
338 | return (EFI_OUT_OF_RESOURCES);\r | |
339 | }\r | |
340 | \r | |
a405b86d | 341 | Node->Key = AllocateZeroPool((StrStr(CurrentString, L"=") - CurrentString + 1) * sizeof(CHAR16));\r |
7f79b01e JC |
342 | if (Node->Key == NULL) {\r |
343 | SHELL_FREE_NON_NULL(Node);\r | |
344 | SetEnvironmentVariableList(&VarList->Link);\r | |
345 | return (EFI_OUT_OF_RESOURCES);\r | |
346 | }\r | |
347 | \r | |
348 | //\r | |
349 | // Copy the string into the Key, leaving the last character allocated as NULL to terminate\r | |
350 | //\r | |
490ce43d | 351 | StrnCpyS( Node->Key, \r |
e75390f0 | 352 | StrStr(CurrentString, L"=") - CurrentString + 1, \r |
490ce43d QS |
353 | CurrentString,\r |
354 | StrStr(CurrentString, L"=") - CurrentString\r | |
e75390f0 | 355 | );\r |
7f79b01e JC |
356 | \r |
357 | //\r | |
358 | // ValueSize = TotalSize - already removed size - size for '=' + size for terminator (the last 2 items cancel each other)\r | |
359 | //\r | |
360 | Node->Val = AllocateCopyPool(StrSize(CurrentString) - StrSize(Node->Key), CurrentString + StrLen(Node->Key) + 1);\r | |
361 | if (Node->Val == NULL) {\r | |
362 | SHELL_FREE_NON_NULL(Node->Key);\r | |
363 | SHELL_FREE_NON_NULL(Node);\r | |
364 | SetEnvironmentVariableList(&VarList->Link);\r | |
365 | return (EFI_OUT_OF_RESOURCES);\r | |
366 | }\r | |
367 | \r | |
a405b86d | 368 | Node->Atts = EFI_VARIABLE_BOOTSERVICE_ACCESS;\r |
369 | \r | |
370 | if (VarList == NULL) {\r | |
371 | VarList = AllocateZeroPool(sizeof(ENV_VAR_LIST));\r | |
7f79b01e JC |
372 | if (VarList == NULL) {\r |
373 | SHELL_FREE_NON_NULL(Node->Key);\r | |
374 | SHELL_FREE_NON_NULL(Node->Val);\r | |
375 | SHELL_FREE_NON_NULL(Node);\r | |
376 | return (EFI_OUT_OF_RESOURCES);\r | |
377 | }\r | |
a405b86d | 378 | InitializeListHead(&VarList->Link);\r |
379 | }\r | |
380 | InsertTailList(&VarList->Link, &Node->Link);\r | |
381 | \r | |
382 | } // for loop\r | |
383 | \r | |
384 | //\r | |
385 | // set this new list as the set of all environment variables.\r | |
386 | // this function also frees the memory and deletes all pre-existing\r | |
387 | // shell-guid based environment variables.\r | |
388 | //\r | |
389 | return (SetEnvironmentVariableList(&VarList->Link));\r | |
390 | }\r | |
b62bb885 QS |
391 | \r |
392 | /**\r | |
393 | Find an environment variable in the gShellEnvVarList.\r | |
394 | \r | |
395 | @param Key The name of the environment variable.\r | |
396 | @param Value The value of the environment variable, the buffer\r | |
397 | shoule be freed by the caller.\r | |
398 | @param ValueSize The size in bytes of the environment variable\r | |
399 | including the tailing CHAR_NELL.\r | |
400 | @param Atts The attributes of the variable.\r | |
401 | \r | |
402 | @retval EFI_SUCCESS The command executed successfully.\r | |
403 | @retval EFI_NOT_FOUND The environment variable is not found in\r | |
404 | gShellEnvVarList.\r | |
405 | \r | |
406 | **/\r | |
407 | EFI_STATUS\r | |
408 | ShellFindEnvVarInList (\r | |
409 | IN CONST CHAR16 *Key,\r | |
410 | OUT CHAR16 **Value,\r | |
411 | OUT UINTN *ValueSize,\r | |
412 | OUT UINT32 *Atts OPTIONAL\r | |
413 | )\r | |
414 | {\r | |
415 | ENV_VAR_LIST *Node;\r | |
416 | \r | |
417 | if (Key == NULL || Value == NULL || ValueSize == NULL) {\r | |
418 | return SHELL_INVALID_PARAMETER;\r | |
419 | }\r | |
420 | \r | |
421 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(&gShellEnvVarList.Link)\r | |
422 | ; !IsNull(&gShellEnvVarList.Link, &Node->Link)\r | |
423 | ; Node = (ENV_VAR_LIST*)GetNextNode(&gShellEnvVarList.Link, &Node->Link)\r | |
424 | ){\r | |
425 | if (Node->Key != NULL && StrCmp(Key, Node->Key) == 0) {\r | |
426 | *Value = AllocateCopyPool(StrSize(Node->Val), Node->Val);\r | |
427 | *ValueSize = StrSize(Node->Val);\r | |
428 | if (Atts != NULL) {\r | |
429 | *Atts = Node->Atts;\r | |
430 | }\r | |
431 | return EFI_SUCCESS;\r | |
432 | }\r | |
433 | }\r | |
434 | \r | |
435 | return EFI_NOT_FOUND;\r | |
436 | }\r | |
437 | \r | |
438 | /**\r | |
439 | Add an environment variable into gShellEnvVarList.\r | |
440 | \r | |
441 | @param Key The name of the environment variable.\r | |
442 | @param Value The value of environment variable.\r | |
443 | @param ValueSize The size in bytes of the environment variable\r | |
444 | including the tailing CHAR_NULL\r | |
445 | @param Atts The attributes of the variable.\r | |
446 | \r | |
ffbc60a0 RN |
447 | @retval EFI_SUCCESS The environment variable was added to list successfully.\r |
448 | @retval others Some errors happened.\r | |
449 | \r | |
b62bb885 | 450 | **/\r |
ffbc60a0 | 451 | EFI_STATUS\r |
b62bb885 QS |
452 | ShellAddEnvVarToList (\r |
453 | IN CONST CHAR16 *Key,\r | |
454 | IN CONST CHAR16 *Value,\r | |
455 | IN UINTN ValueSize,\r | |
456 | IN UINT32 Atts\r | |
457 | )\r | |
458 | {\r | |
459 | ENV_VAR_LIST *Node;\r | |
ffbc60a0 RN |
460 | CHAR16 *LocalKey;\r |
461 | CHAR16 *LocalValue;\r | |
b62bb885 QS |
462 | \r |
463 | if (Key == NULL || Value == NULL || ValueSize == 0) {\r | |
ffbc60a0 RN |
464 | return EFI_INVALID_PARAMETER;\r |
465 | }\r | |
466 | \r | |
467 | LocalValue = AllocateCopyPool (ValueSize, Value);\r | |
468 | if (LocalValue == NULL) {\r | |
469 | return EFI_OUT_OF_RESOURCES;\r | |
b62bb885 QS |
470 | }\r |
471 | \r | |
472 | //\r | |
473 | // Update the variable value if it exists in gShellEnvVarList.\r | |
474 | //\r | |
475 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(&gShellEnvVarList.Link)\r | |
476 | ; !IsNull(&gShellEnvVarList.Link, &Node->Link)\r | |
477 | ; Node = (ENV_VAR_LIST*)GetNextNode(&gShellEnvVarList.Link, &Node->Link)\r | |
478 | ){\r | |
479 | if (Node->Key != NULL && StrCmp(Key, Node->Key) == 0) {\r | |
480 | Node->Atts = Atts;\r | |
481 | SHELL_FREE_NON_NULL(Node->Val);\r | |
ffbc60a0 RN |
482 | Node->Val = LocalValue;\r |
483 | return EFI_SUCCESS;\r | |
b62bb885 QS |
484 | }\r |
485 | }\r | |
486 | \r | |
487 | //\r | |
488 | // If the environment varialbe key doesn't exist in list just insert\r | |
489 | // a new node.\r | |
490 | //\r | |
ffbc60a0 RN |
491 | LocalKey = AllocateCopyPool (StrSize(Key), Key);\r |
492 | if (LocalKey == NULL) {\r | |
493 | FreePool (LocalValue);\r | |
494 | return EFI_OUT_OF_RESOURCES;\r | |
495 | }\r | |
b62bb885 | 496 | Node = (ENV_VAR_LIST*)AllocateZeroPool (sizeof(ENV_VAR_LIST));\r |
ffbc60a0 RN |
497 | if (Node == NULL) {\r |
498 | FreePool (LocalKey);\r | |
499 | FreePool (LocalValue);\r | |
500 | return EFI_OUT_OF_RESOURCES;\r | |
501 | }\r | |
502 | Node->Key = LocalKey;\r | |
503 | Node->Val = LocalValue;\r | |
b62bb885 QS |
504 | Node->Atts = Atts;\r |
505 | InsertTailList(&gShellEnvVarList.Link, &Node->Link);\r | |
506 | \r | |
ffbc60a0 | 507 | return EFI_SUCCESS;\r |
b62bb885 QS |
508 | }\r |
509 | \r | |
510 | /**\r | |
511 | Remove a specified environment variable in gShellEnvVarList.\r | |
512 | \r | |
513 | @param Key The name of the environment variable.\r | |
514 | \r | |
515 | @retval EFI_SUCCESS The command executed successfully.\r | |
516 | @retval EFI_NOT_FOUND The environment variable is not found in\r | |
517 | gShellEnvVarList.\r | |
518 | **/\r | |
519 | EFI_STATUS\r | |
520 | ShellRemvoeEnvVarFromList (\r | |
521 | IN CONST CHAR16 *Key\r | |
522 | )\r | |
523 | {\r | |
524 | ENV_VAR_LIST *Node;\r | |
525 | \r | |
526 | if (Key == NULL) {\r | |
527 | return EFI_INVALID_PARAMETER;\r | |
528 | }\r | |
529 | \r | |
530 | for ( Node = (ENV_VAR_LIST*)GetFirstNode(&gShellEnvVarList.Link)\r | |
531 | ; !IsNull(&gShellEnvVarList.Link, &Node->Link)\r | |
532 | ; Node = (ENV_VAR_LIST*)GetNextNode(&gShellEnvVarList.Link, &Node->Link)\r | |
533 | ){\r | |
534 | if (Node->Key != NULL && StrCmp(Key, Node->Key) == 0) {\r | |
535 | SHELL_FREE_NON_NULL(Node->Key);\r | |
536 | SHELL_FREE_NON_NULL(Node->Val);\r | |
537 | RemoveEntryList(&Node->Link);\r | |
538 | SHELL_FREE_NON_NULL(Node);\r | |
539 | return EFI_SUCCESS;\r | |
540 | }\r | |
541 | }\r | |
542 | \r | |
543 | return EFI_NOT_FOUND;\r | |
544 | }\r | |
545 | \r | |
546 | /**\r | |
547 | Initialize the gShellEnvVarList and cache all Shell-Guid-based environment\r | |
548 | variables.\r | |
549 | \r | |
550 | **/\r | |
551 | EFI_STATUS\r | |
552 | ShellInitEnvVarList (\r | |
553 | VOID\r | |
554 | )\r | |
555 | {\r | |
556 | EFI_STATUS Status;\r | |
557 | \r | |
558 | InitializeListHead(&gShellEnvVarList.Link);\r | |
559 | Status = GetEnvironmentVariableList (&gShellEnvVarList.Link);\r | |
560 | \r | |
561 | return Status;\r | |
562 | }\r | |
563 | \r | |
564 | /**\r | |
565 | Destructe the gShellEnvVarList.\r | |
566 | \r | |
567 | **/\r | |
568 | VOID\r | |
569 | ShellFreeEnvVarList (\r | |
570 | VOID\r | |
571 | )\r | |
572 | {\r | |
573 | FreeEnvironmentVariableList (&gShellEnvVarList.Link);\r | |
574 | InitializeListHead(&gShellEnvVarList.Link);\r | |
575 | \r | |
576 | return;\r | |
577 | }\r | |
578 | \r |