1 : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 : /* ***** BEGIN LICENSE BLOCK *****
3 : * Version: MPL 1.1/GPL 2.0/LGPL 2.1
4 : *
5 : * The contents of this file are subject to the Mozilla Public License Version
6 : * 1.1 (the "License"); you may not use this file except in compliance with
7 : * the License. You may obtain a copy of the License at
8 : * http://www.mozilla.org/MPL/
9 : *
10 : * Software distributed under the License is distributed on an "AS IS" basis,
11 : * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
12 : * for the specific language governing rights and limitations under the
13 : * License.
14 : *
15 : * The Original Code is mozilla embedding code.
16 : *
17 : * The Initial Developers of the Original Code are
18 : * Benjamin Smedberg <bsmedberg@covad.net> and
19 : * Roland Mainz <roland.mainz@informatik.med.uni-giessen.de>.
20 : *
21 : * Portions created by the Initial Developer are Copyright (C) 2003/2004
22 : * the Initial Developer. All Rights Reserved.
23 : *
24 : * Contributor(s):
25 : *
26 : * Alternatively, the contents of this file may be used under the terms of
27 : * either the GNU General Public License Version 2 or later (the "GPL"), or
28 : * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
29 : * in which case the provisions of the GPL or the LGPL are applicable instead
30 : * of those above. If you wish to allow use of your version of this file only
31 : * under the terms of either the GPL or the LGPL, and not to allow others to
32 : * use your version of this file under the terms of the MPL, indicate your
33 : * decision by deleting the provisions above and replace them with the notice
34 : * and other provisions required by the GPL or the LGPL. If you do not delete
35 : * the provisions above, a recipient may use your version of this file under
36 : * the terms of any one of the MPL, the GPL or the LGPL.
37 : *
38 : * ***** END LICENSE BLOCK ***** */
39 :
40 : #include "nsEnvironment.h"
41 : #include "prenv.h"
42 : #include "prprf.h"
43 : #include "nsBaseHashtable.h"
44 : #include "nsHashKeys.h"
45 : #include "nsPromiseFlatString.h"
46 : #include "nsDependentString.h"
47 : #include "nsNativeCharsetUtils.h"
48 :
49 : using namespace mozilla;
50 :
51 16987 : NS_IMPL_THREADSAFE_ISUPPORTS1(nsEnvironment, nsIEnvironment)
52 :
53 : nsresult
54 784 : nsEnvironment::Create(nsISupports *aOuter, REFNSIID aIID,
55 : void **aResult)
56 : {
57 : nsresult rv;
58 784 : *aResult = nsnull;
59 :
60 784 : if (aOuter != nsnull) {
61 0 : return NS_ERROR_NO_AGGREGATION;
62 : }
63 :
64 784 : nsEnvironment* obj = new nsEnvironment();
65 784 : if (!obj) {
66 0 : return NS_ERROR_OUT_OF_MEMORY;
67 : }
68 :
69 784 : rv = obj->QueryInterface(aIID, aResult);
70 784 : if (NS_FAILED(rv)) {
71 0 : delete obj;
72 : }
73 784 : return rv;
74 : }
75 :
76 784 : nsEnvironment::~nsEnvironment()
77 : {
78 784 : }
79 :
80 : NS_IMETHODIMP
81 3 : nsEnvironment::Exists(const nsAString& aName, bool *aOutValue)
82 : {
83 6 : nsCAutoString nativeName;
84 3 : nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
85 3 : NS_ENSURE_SUCCESS(rv, rv);
86 :
87 6 : nsCAutoString nativeVal;
88 : #if defined(XP_UNIX)
89 : /* For Unix/Linux platforms we follow the Unix definition:
90 : * An environment variable exists when |getenv()| returns a non-NULL value.
91 : * An environment variable does not exist when |getenv()| returns NULL.
92 : */
93 3 : const char *value = PR_GetEnv(nativeName.get());
94 3 : *aOutValue = value && *value;
95 : #else
96 : /* For non-Unix/Linux platforms we have to fall back to a
97 : * "portable" definition (which is incorrect for Unix/Linux!!!!)
98 : * which simply checks whether the string returned by |Get()| is empty
99 : * or not.
100 : */
101 : nsAutoString value;
102 : Get(aName, value);
103 : *aOutValue = !value.IsEmpty();
104 : #endif /* XP_UNIX */
105 :
106 3 : return NS_OK;
107 : }
108 :
109 : NS_IMETHODIMP
110 865 : nsEnvironment::Get(const nsAString& aName, nsAString& aOutValue)
111 : {
112 1730 : nsCAutoString nativeName;
113 865 : nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
114 865 : NS_ENSURE_SUCCESS(rv, rv);
115 :
116 1730 : nsCAutoString nativeVal;
117 865 : const char *value = PR_GetEnv(nativeName.get());
118 865 : if (value && *value) {
119 864 : rv = NS_CopyNativeToUnicode(nsDependentCString(value), aOutValue);
120 : } else {
121 1 : aOutValue.Truncate();
122 1 : rv = NS_OK;
123 : }
124 :
125 865 : return rv;
126 : }
127 :
128 : /* Environment strings must have static duration; We're gonna leak all of this
129 : * at shutdown: this is by design, caused how Unix/Linux implement environment
130 : * vars.
131 : */
132 :
133 : typedef nsBaseHashtableET<nsCharPtrHashKey,char*> EnvEntryType;
134 : typedef nsTHashtable<EnvEntryType> EnvHashType;
135 :
136 : static EnvHashType *gEnvHash = nsnull;
137 :
138 : static bool
139 14 : EnsureEnvHash()
140 : {
141 14 : if (gEnvHash)
142 10 : return true;
143 :
144 4 : gEnvHash = new EnvHashType;
145 4 : if (!gEnvHash)
146 0 : return false;
147 :
148 4 : if(gEnvHash->Init())
149 4 : return true;
150 :
151 0 : delete gEnvHash;
152 0 : gEnvHash = nsnull;
153 0 : return false;
154 : }
155 :
156 : NS_IMETHODIMP
157 14 : nsEnvironment::Set(const nsAString& aName, const nsAString& aValue)
158 : {
159 28 : nsCAutoString nativeName;
160 28 : nsCAutoString nativeVal;
161 :
162 14 : nsresult rv = NS_CopyUnicodeToNative(aName, nativeName);
163 14 : NS_ENSURE_SUCCESS(rv, rv);
164 :
165 14 : rv = NS_CopyUnicodeToNative(aValue, nativeVal);
166 14 : NS_ENSURE_SUCCESS(rv, rv);
167 :
168 28 : MutexAutoLock lock(mLock);
169 :
170 14 : if (!EnsureEnvHash()){
171 0 : return NS_ERROR_UNEXPECTED;
172 : }
173 :
174 14 : EnvEntryType* entry = gEnvHash->PutEntry(nativeName.get());
175 14 : if (!entry) {
176 0 : return NS_ERROR_OUT_OF_MEMORY;
177 : }
178 :
179 : char* newData = PR_smprintf("%s=%s",
180 : nativeName.get(),
181 14 : nativeVal.get());
182 14 : if (!newData) {
183 0 : return NS_ERROR_OUT_OF_MEMORY;
184 : }
185 :
186 14 : PR_SetEnv(newData);
187 14 : if (entry->mData) {
188 3 : PR_smprintf_free(entry->mData);
189 : }
190 14 : entry->mData = newData;
191 14 : return NS_OK;
192 : }
193 :
194 :
|