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d7ce7006 | 1 | /** @file\r |
2 | Implement the realpath function.\r | |
3 | \r | |
0164fc8e | 4 | Copyright (c) 2011 - 2014, Intel Corporation\r |
d7ce7006 | 5 | All rights reserved. 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 | |
d7ce7006 | 12 | **/\r |
d7ce7006 | 13 | #include <LibConfig.h>\r |
14 | #include <Library/BaseLib.h>\r | |
d7ce7006 | 15 | #include <Library/MemoryAllocationLib.h>\r |
16 | #include <errno.h>\r | |
17 | \r | |
0164fc8e | 18 | /** The realpath() function shall derive, from the pathname pointed to by\r |
19 | file_name, an absolute pathname that names the same file, whose resolution\r | |
20 | does not involve '.', '..', or symbolic links.\r | |
21 | \r | |
22 | The generated pathname shall be stored as a null-terminated string, up to a\r | |
23 | maximum of {PATH_MAX} bytes, in the buffer pointed to by resolved_name.\r | |
d7ce7006 | 24 | \r |
0164fc8e | 25 | If resolved_name is a null pointer, the behavior of realpath() is\r |
26 | implementation-defined.\r | |
d7ce7006 | 27 | \r |
28 | @param[in] file_name The filename to convert.\r | |
29 | @param[in,out] resolved_name The resultant name.\r | |
30 | \r | |
31 | @retval NULL An error occured.\r | |
32 | @return resolved_name.\r | |
33 | **/\r | |
34 | char *\r | |
35 | realpath(\r | |
0164fc8e | 36 | char *file_name,\r |
d7ce7006 | 37 | char *resolved_name\r |
38 | )\r | |
39 | {\r | |
40 | CHAR16 *Temp;\r | |
41 | if (file_name == NULL || resolved_name == NULL) {\r | |
42 | errno = EINVAL;\r | |
43 | return (NULL);\r | |
44 | }\r | |
45 | Temp = AllocateZeroPool((1+AsciiStrLen(file_name))*sizeof(CHAR16));\r | |
46 | if (Temp == NULL) {\r | |
47 | errno = ENOMEM;\r | |
48 | return (NULL);\r | |
49 | }\r | |
50 | AsciiStrToUnicodeStr(file_name, Temp);\r | |
51 | PathCleanUpDirectories(Temp);\r | |
52 | UnicodeStrToAsciiStr(Temp, resolved_name);\r | |
53 | return (resolved_name);\r | |
0164fc8e | 54 | }\r |