env-generic.cpp@ 86697

Last change on this file since 86697 was 85121, checked in by vboxsync, 4 years ago
iprt/cdefs.h: Refactored the typedef use of DECLCALLBACK as well as DECLCALLBACKMEMBER to wrap the whole expression, similar to the DECLR?CALLBACKMEMBER macros. This allows adding a throw() at the end when compiling with the VC++ compiler to indicate that the callbacks won't throw anything, so we can stop supressing the C5039 warning about passing functions that can potential throw C++ exceptions to extern C code that can't necessarily cope with such (unwind,++). Introduced a few _EX variations that allows specifying different/no calling convention too, as that's handy when dynamically resolving host APIs. Fixed numerous places missing DECLCALLBACK and such. Left two angry @todos regarding use of CreateThread. bugref:9794
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File size: 40.5 KB

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1	/* $Id: env-generic.cpp 85121 2020-07-08 19:33:26Z vboxsync $ */
2	/** @file
3	* IPRT - Environment, Generic.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*********************************************************************************************************************************
29	* Header Files *
30	*********************************************************************************************************************************/
31	#include <iprt/env.h>
32	#include "internal/iprt.h"
33
34	#include <iprt/assert.h>
35	#include <iprt/alloc.h>
36	#include <iprt/alloca.h>
37	#include <iprt/err.h>
38	#include <iprt/sort.h>
39	#include <iprt/string.h>
40	#include <iprt/utf16.h>
41	#include "internal/magics.h"
42
43	#include <stdlib.h>
44	#if !defined(RT_OS_WINDOWS)
45	# include <unistd.h>
46	#endif
47	#ifdef RT_OS_DARWIN
48	# include <crt_externs.h>
49	#endif
50	#if defined(RT_OS_SOLARIS) \|\| defined(RT_OS_FREEBSD) \|\| defined(RT_OS_NETBSD) \|\| defined(RT_OS_OPENBSD)
51	RT_C_DECLS_BEGIN
52	extern char **environ;
53	RT_C_DECLS_END
54	#endif
55
56
57	/*********************************************************************************************************************************
58	* Defined Constants And Macros *
59	*********************************************************************************************************************************/
60	/** The allocation granularity of the RTENVINTERNAL::papszEnv memory. */
61	#define RTENV_GROW_SIZE 16
62
63	/** Macro that unlocks the specified environment block. */
64	#define RTENV_LOCK(pEnvInt) do { } while (0)
65	/** Macro that unlocks the specified environment block. */
66	#define RTENV_UNLOCK(pEnvInt) do { } while (0)
67
68	/** @def RTENV_HAVE_WENVIRON
69	* Indicates that we have a _wenviron variable with UTF-16 strings that we
70	* better use instead of the current-cp strings in environ. */
71	#if defined(RT_OS_WINDOWS) \|\| defined(DOXYGEN_RUNNING)
72	# define RTENV_HAVE_WENVIRON 1
73	#endif
74
75	/** @def RTENV_IMPLEMENTS_UTF8_DEFAULT_ENV_API
76	* Indicates the RTEnvUtf8 APIs are implemented. /
77	#if defined(RT_OS_WINDOWS) \|\| defined(DOXYGEN_RUNNING)
78	# define RTENV_IMPLEMENTS_UTF8_DEFAULT_ENV_API 1
79	#endif
80
81
82	/** @def RTENV_ALLOW_EQUAL_FIRST_IN_VAR
83	* Allows a variable to start with an '=' sign by default. This is used by
84	* windows to maintain CWDs of non-current drives.
85	* @note Not supported by _wputenv AFAIK. */
86	#if defined(RT_OS_WINDOWS) \|\| defined(DOXYGEN_RUNNING)
87	# define RTENV_ALLOW_EQUAL_FIRST_IN_VAR 1
88	#endif
89
90
91	/*********************************************************************************************************************************
92	* Structures and Typedefs *
93	*********************************************************************************************************************************/
94	/**
95	* The internal representation of a (non-default) environment.
96	*/
97	typedef struct RTENVINTERNAL
98	{
99	/** Magic value . */
100	uint32_t u32Magic;
101	/** Set if this is a record of environment changes, putenv style. */
102	bool fPutEnvBlock;
103	/** Set if starting a variable with an equal sign is okay, clear if not okay
104	* (RTENV_CREATE_F_ALLOW_EQUAL_FIRST_IN_VAR). */
105	bool fFirstEqual;
106	/** Number of variables in the array.
107	* This does not include the terminating NULL entry. */
108	size_t cVars;
109	/** Capacity (allocated size) of the array.
110	* This includes space for the terminating NULL element (for compatibility
111	* with the C library), so that c <= cCapacity - 1. */
112	size_t cAllocated;
113	/** Array of environment variables.
114	* These are always in "NAME=VALUE" form, where the value can be empty. If
115	* fPutEnvBlock is set though, there will be "NAME" entries too for variables
116	* that need to be removed when merged with another environment block. */
117	char **papszEnv;
118	/** Array of environment variables in the process CP.
119	* This get (re-)constructed when RTEnvGetExecEnvP method is called. */
120	char **papszEnvOtherCP;
121
122	/** The compare function we're using. */
123	DECLCALLBACKMEMBER(int, pfnCompare,(const char psz1, const char psz2, size_t cchMax));
124	} RTENVINTERNAL, *PRTENVINTERNAL;
125
126
127	/**
128	* Internal worker that resolves the pointer to the default
129	* process environment. (environ)
130	*
131	* @returns Pointer to the default environment.
132	* This may be NULL.
133	*/
134	static const char * const *rtEnvDefault(void)
135	{
136	#ifdef RT_OS_DARWIN
137	return *(_NSGetEnviron());
138	#else
139	return environ;
140	#endif
141	}
142
143
144	/**
145	* Internal worker that creates an environment handle with a specified capacity.
146	*
147	* @returns IPRT status code.
148	* @param ppIntEnv Where to store the result.
149	* @param cAllocated The initial array size.
150	* @param fCaseSensitive Whether the environment block is case sensitive or
151	* not.
152	* @param fPutEnvBlock Indicates whether this is a special environment
153	* block that will be used to record change another
154	* block. We will keep unsets in putenv format, i.e.
155	* just the variable name without any equal sign.
156	* @param fFirstEqual The RTENV_CREATE_F_ALLOW_EQUAL_FIRST_IN_VAR value.
157	*/
158	static int rtEnvCreate(PRTENVINTERNAL *ppIntEnv, size_t cAllocated, bool fCaseSensitive, bool fPutEnvBlock, bool fFirstEqual)
159	{
160	/*
161	* Allocate environment handle.
162	*/
163	PRTENVINTERNAL pIntEnv = (PRTENVINTERNAL)RTMemAlloc(sizeof(*pIntEnv));
164	if (pIntEnv)
165	{
166	/*
167	* Pre-allocate the variable array.
168	*/
169	pIntEnv->u32Magic = RTENV_MAGIC;
170	pIntEnv->fPutEnvBlock = fPutEnvBlock;
171	pIntEnv->fFirstEqual = fFirstEqual;
172	pIntEnv->pfnCompare = fCaseSensitive ? RTStrNCmp : RTStrNICmp;
173	pIntEnv->papszEnvOtherCP = NULL;
174	pIntEnv->cVars = 0;
175	pIntEnv->cAllocated = RT_ALIGN_Z(RT_MAX(cAllocated, RTENV_GROW_SIZE), RTENV_GROW_SIZE);
176	pIntEnv->papszEnv = (char *)RTMemAllocZ(sizeof(pIntEnv->papszEnv[0]) pIntEnv->cAllocated);
177	if (pIntEnv->papszEnv)
178	{
179	*ppIntEnv = pIntEnv;
180	return VINF_SUCCESS;
181	}
182
183	RTMemFree(pIntEnv);
184	}
185
186	return VERR_NO_MEMORY;
187	}
188
189
190	RTDECL(int) RTEnvCreate(PRTENV pEnv)
191	{
192	AssertPtrReturn(pEnv, VERR_INVALID_POINTER);
193	#ifdef RTENV_ALLOW_EQUAL_FIRST_IN_VAR
194	return rtEnvCreate(pEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, false /fPutEnvBlock/, true /fFirstEqual/);
195	#else
196	return rtEnvCreate(pEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, false /fPutEnvBlock/, false/fFirstEqual/);
197	#endif
198	}
199	RT_EXPORT_SYMBOL(RTEnvCreate);
200
201
202	RTDECL(int) RTEnvCreateEx(PRTENV phEnv, uint32_t fFlags)
203	{
204	AssertPtrReturn(phEnv, VERR_INVALID_POINTER);
205	AssertReturn(!(fFlags & ~RTENV_CREATE_F_VALID_MASK), VERR_INVALID_FLAGS);
206	return rtEnvCreate(phEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, false /fPutEnvBlock/,
207	RT_BOOL(fFlags & RTENV_CREATE_F_ALLOW_EQUAL_FIRST_IN_VAR));
208	}
209	RT_EXPORT_SYMBOL(RTEnvCreateEx);
210
211
212	RTDECL(int) RTEnvDestroy(RTENV Env)
213	{
214	/*
215	* Ignore NIL_RTENV and validate input.
216	*/
217	if ( Env == NIL_RTENV
218	\|\| Env == RTENV_DEFAULT)
219	return VINF_SUCCESS;
220
221	PRTENVINTERNAL pIntEnv = Env;
222	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
223	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
224
225	/*
226	* Do the cleanup.
227	*/
228	RTENV_LOCK(pIntEnv);
229	pIntEnv->u32Magic++;
230	size_t iVar = pIntEnv->cVars;
231	while (iVar-- > 0)
232	RTStrFree(pIntEnv->papszEnv[iVar]);
233	RTMemFree(pIntEnv->papszEnv);
234	pIntEnv->papszEnv = NULL;
235
236	if (pIntEnv->papszEnvOtherCP)
237	{
238	for (iVar = 0; pIntEnv->papszEnvOtherCP[iVar]; iVar++)
239	{
240	RTStrFree(pIntEnv->papszEnvOtherCP[iVar]);
241	pIntEnv->papszEnvOtherCP[iVar] = NULL;
242	}
243	RTMemFree(pIntEnv->papszEnvOtherCP);
244	pIntEnv->papszEnvOtherCP = NULL;
245	}
246
247	RTENV_UNLOCK(pIntEnv);
248	/RTCritSectDelete(&pIntEnv->CritSect) /
249	RTMemFree(pIntEnv);
250
251	return VINF_SUCCESS;
252	}
253	RT_EXPORT_SYMBOL(RTEnvDestroy);
254
255
256	RTDECL(int) RTEnvClone(PRTENV pEnv, RTENV EnvToClone)
257	{
258	/*
259	* Validate input and figure out how many variable to clone and where to get them.
260	*/
261	bool fCaseSensitive = true;
262	bool fPutEnvBlock = false;
263	bool fFirstEqual = false;
264	size_t cVars;
265	const char * const *papszEnv;
266	#ifdef RTENV_HAVE_WENVIRON
267	PCRTUTF16 const * papwszEnv = NULL;
268	#endif
269	PRTENVINTERNAL pIntEnvToClone;
270	AssertPtrReturn(pEnv, VERR_INVALID_POINTER);
271	if (EnvToClone == RTENV_DEFAULT)
272	{
273	cVars = 0;
274	pIntEnvToClone = NULL;
275	#ifdef RTENV_HAVE_WENVIRON
276	papszEnv = NULL;
277	papwszEnv = (PCRTUTF16 * const)_wenviron;
278	if (!papwszEnv)
279	{
280	_wgetenv(L"Path"); /* Force the CRT to initalize it. */
281	papwszEnv = (PCRTUTF16 * const)_wenviron;
282	}
283	if (papwszEnv)
284	while (papwszEnv[cVars])
285	cVars++;
286	#else
287	papszEnv = rtEnvDefault();
288	if (papszEnv)
289	while (papszEnv[cVars])
290	cVars++;
291	#endif
292
293	#if defined(RT_OS_OS2) \|\| defined(RT_OS_WINDOWS)
294	/* DOS systems was case insensitive. A prime example is the 'Path'
295	variable on windows which turns into the 'PATH' variable. */
296	fCaseSensitive = false;
297	#endif
298	#ifdef RTENV_ALLOW_EQUAL_FIRST_IN_VAR
299	fFirstEqual = true;
300	#endif
301	}
302	else
303	{
304	pIntEnvToClone = EnvToClone;
305	AssertPtrReturn(pIntEnvToClone, VERR_INVALID_HANDLE);
306	AssertReturn(pIntEnvToClone->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
307	RTENV_LOCK(pIntEnvToClone);
308
309	fPutEnvBlock = pIntEnvToClone->fPutEnvBlock;
310	fFirstEqual = pIntEnvToClone->fFirstEqual;
311	papszEnv = pIntEnvToClone->papszEnv;
312	cVars = pIntEnvToClone->cVars;
313	}
314
315	/*
316	* Create the duplicate.
317	*/
318	PRTENVINTERNAL pIntEnv;
319	int rc = rtEnvCreate(&pIntEnv, cVars + 1 /* NULL */, fCaseSensitive, fPutEnvBlock, fFirstEqual);
320	if (RT_SUCCESS(rc))
321	{
322	pIntEnv->cVars = cVars;
323	pIntEnv->papszEnv[pIntEnv->cVars] = NULL;
324	if (EnvToClone == RTENV_DEFAULT)
325	{
326	/* ASSUMES the default environment is in the current codepage. */
327	size_t iDst = 0;
328	for (size_t iSrc = 0; iSrc < cVars; iSrc++)
329	{
330	#ifdef RTENV_HAVE_WENVIRON
331	int rc2 = RTUtf16ToUtf8(papwszEnv[iSrc], &pIntEnv->papszEnv[iDst]);
332	#else
333	int rc2 = RTStrCurrentCPToUtf8(&pIntEnv->papszEnv[iDst], papszEnv[iSrc]);
334	#endif
335	if (RT_SUCCESS(rc2))
336	{
337	/* Make sure it contains an '='. */
338	iDst++;
339	if (strchr(pIntEnv->papszEnv[iDst - 1], '='))
340	continue;
341	rc2 = RTStrAAppend(&pIntEnv->papszEnv[iDst - 1], "=");
342	if (RT_SUCCESS(rc2))
343	continue;
344	}
345	else if (rc2 == VERR_NO_TRANSLATION)
346	{
347	rc = VWRN_ENV_NOT_FULLY_TRANSLATED;
348	continue;
349	}
350
351	/* failed fatally. */
352	pIntEnv->cVars = iDst;
353	RTEnvDestroy(pIntEnv);
354	return rc2;
355	}
356	pIntEnv->cVars = iDst;
357	}
358	else
359	{
360	for (size_t iVar = 0; iVar < cVars; iVar++)
361	{
362	char *pszVar = RTStrDup(papszEnv[iVar]);
363	if (RT_UNLIKELY(!pszVar))
364	{
365	RTENV_UNLOCK(pIntEnvToClone);
366
367	pIntEnv->cVars = iVar;
368	RTEnvDestroy(pIntEnv);
369	return VERR_NO_STR_MEMORY;
370	}
371	pIntEnv->papszEnv[iVar] = pszVar;
372	}
373	}
374
375	/* done */
376	*pEnv = pIntEnv;
377	}
378
379	if (pIntEnvToClone)
380	RTENV_UNLOCK(pIntEnvToClone);
381	return rc;
382	}
383	RT_EXPORT_SYMBOL(RTEnvClone);
384
385
386	RTDECL(int) RTEnvCloneUtf16Block(PRTENV phEnv, PCRTUTF16 pwszzBlock, uint32_t fFlags)
387	{
388	AssertPtrReturn(pwszzBlock, VERR_INVALID_POINTER);
389	AssertReturn(!fFlags, VERR_INVALID_FLAGS);
390
391	/*
392	* Count the number of variables in the block.
393	*/
394	uint32_t cVars = 0;
395	PCRTUTF16 pwsz = pwszzBlock;
396	while (*pwsz != '\0')
397	{
398	cVars++;
399	pwsz += RTUtf16Len(pwsz) + 1;
400	AssertReturn(cVars < _256K, VERR_OUT_OF_RANGE);
401	}
402
403	/*
404	* Create the duplicate.
405	*/
406	PRTENVINTERNAL pIntEnv;
407	#ifdef RTENV_ALLOW_EQUAL_FIRST_IN_VAR
408	int rc = rtEnvCreate(&pIntEnv, cVars + 1 /* NULL /, false /fCaseSensitive/, false /fPutEnvBlock/, true /fFirstEqual*/);
409	#else
410	int rc = rtEnvCreate(&pIntEnv, cVars + 1 /* NULL /, false /fCaseSensitive/, false /fPutEnvBlock/, false /fFirstEqual*/);
411	#endif
412	if (RT_SUCCESS(rc))
413	{
414	pIntEnv->cVars = cVars;
415	pIntEnv->papszEnv[pIntEnv->cVars] = NULL;
416
417	size_t iDst = 0;
418	for (pwsz = pwszzBlock; *pwsz != '\0'; pwsz += RTUtf16Len(pwsz) + 1)
419	{
420	int rc2 = RTUtf16ToUtf8(pwsz, &pIntEnv->papszEnv[iDst]);
421	if (RT_SUCCESS(rc2))
422	{
423	/* Make sure it contains an '='. */
424	const char *pszEqual = strchr(pIntEnv->papszEnv[iDst], '=');
425	if (!pszEqual)
426	{
427	rc2 = RTStrAAppend(&pIntEnv->papszEnv[iDst], "=");
428	if (RT_SUCCESS(rc2))
429	pszEqual = strchr(pIntEnv->papszEnv[iDst], '=');
430
431	}
432	if (pszEqual)
433	{
434	/* Check for duplicates, keep the last version. */
435	const char *pchVar = pIntEnv->papszEnv[iDst];
436	size_t cchVarNmAndEq = pszEqual - pchVar;
437	for (size_t iDst2 = 0; iDst2 < iDst; iDst2++)
438	if (pIntEnv->pfnCompare(pIntEnv->papszEnv[iDst2], pchVar, cchVarNmAndEq) == 0)
439	{
440	RTStrFree(pIntEnv->papszEnv[iDst2]);
441	pIntEnv->papszEnv[iDst2] = pIntEnv->papszEnv[iDst];
442	pIntEnv->papszEnv[iDst] = NULL;
443	iDst--;
444	break;
445	}
446	iDst++;
447	continue;
448	}
449	iDst++;
450	}
451
452	/* failed fatally. */
453	pIntEnv->cVars = iDst;
454	RTEnvDestroy(pIntEnv);
455	return rc2;
456	}
457	Assert(iDst <= pIntEnv->cVars);
458	pIntEnv->cVars = iDst;
459
460	/* done */
461	*phEnv = pIntEnv;
462	}
463	return rc;
464	}
465	RT_EXPORT_SYMBOL(RTEnvCloneUtf16Block);
466
467
468
469	RTDECL(int) RTEnvReset(RTENV hEnv)
470	{
471	PRTENVINTERNAL pIntEnv = hEnv;
472	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
473	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
474
475	RTENV_LOCK(pIntEnv);
476
477	size_t iVar = pIntEnv->cVars;
478	pIntEnv->cVars = 0;
479	while (iVar-- > 0)
480	{
481	RTMemFree(pIntEnv->papszEnv[iVar]);
482	pIntEnv->papszEnv[iVar] = NULL;
483	}
484
485	RTENV_UNLOCK(pIntEnv);
486	return VINF_SUCCESS;
487	}
488	RT_EXPORT_SYMBOL(RTEnvReset);
489
490
491	/**
492	* Appends an already allocated string to papszEnv.
493	*
494	* @returns IPRT status code
495	* @param pIntEnv The environment block to append it to.
496	* @param pszEntry The string to add. Already duplicated, caller
497	* does error cleanup.
498	*/
499	static int rtEnvIntAppend(PRTENVINTERNAL pIntEnv, char *pszEntry)
500	{
501	/*
502	* Do we need to resize the array?
503	*/
504	int rc = VINF_SUCCESS;
505	size_t iVar = pIntEnv->cVars;
506	if (iVar + 2 > pIntEnv->cAllocated)
507	{
508	void pvNew = RTMemRealloc(pIntEnv->papszEnv, sizeof(char ) * (pIntEnv->cAllocated + RTENV_GROW_SIZE));
509	if (!pvNew)
510	rc = VERR_NO_MEMORY;
511	else
512	{
513	pIntEnv->papszEnv = (char **)pvNew;
514	pIntEnv->cAllocated += RTENV_GROW_SIZE;
515	for (size_t iNewVar = pIntEnv->cVars; iNewVar < pIntEnv->cAllocated; iNewVar++)
516	pIntEnv->papszEnv[iNewVar] = NULL;
517	}
518	}
519	if (RT_SUCCESS(rc))
520	{
521	/*
522	* Append it.
523	*/
524	pIntEnv->papszEnv[iVar] = pszEntry;
525	pIntEnv->papszEnv[iVar + 1] = NULL; /* this isn't really necessary, but doesn't hurt. */
526	pIntEnv->cVars = iVar + 1;
527	}
528	return rc;
529	}
530
531
532	/**
533	* Worker for RTEnvSetEx and RTEnvPutEx.
534	*/
535	static int rtEnvSetExWorker(RTENV Env, const char pchVar, size_t cchVar, const char pszValue)
536	{
537	int rc;
538	if (Env == RTENV_DEFAULT)
539	{
540	#ifdef RT_OS_WINDOWS
541	extern int rtEnvSetUtf8Worker(const char pchVar, size_t cchVar, const char pszValue);
542	rc = rtEnvSetUtf8Worker(pchVar, cchVar, pszValue);
543	#else
544	/*
545	* Since RTEnvPut isn't UTF-8 clean and actually expects the strings
546	* to be in the current code page (codeset), we'll do the necessary
547	* conversions here.
548	*/
549	char *pszVarOtherCP;
550	rc = RTStrUtf8ToCurrentCPEx(&pszVarOtherCP, pchVar, cchVar);
551	if (RT_SUCCESS(rc))
552	{
553	char *pszValueOtherCP;
554	rc = RTStrUtf8ToCurrentCP(&pszValueOtherCP, pszValue);
555	if (RT_SUCCESS(rc))
556	{
557	rc = RTEnvSet(pszVarOtherCP, pszValueOtherCP);
558	RTStrFree(pszValueOtherCP);
559	}
560	RTStrFree(pszVarOtherCP);
561	}
562	#endif
563	}
564	else
565	{
566	PRTENVINTERNAL pIntEnv = Env;
567	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
568	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
569
570	/*
571	* Create the variable string.
572	*/
573	const size_t cchValue = strlen(pszValue);
574	char pszEntry = (char )RTMemAlloc(cchVar + cchValue + 2);
575	if (pszEntry)
576	{
577	memcpy(pszEntry, pchVar, cchVar);
578	pszEntry[cchVar] = '=';
579	memcpy(&pszEntry[cchVar + 1], pszValue, cchValue + 1);
580
581	RTENV_LOCK(pIntEnv);
582
583	/*
584	* Find the location of the variable. (iVar = cVars if new)
585	*/
586	rc = VINF_SUCCESS;
587	size_t iVar;
588	for (iVar = 0; iVar < pIntEnv->cVars; iVar++)
589	if ( !pIntEnv->pfnCompare(pIntEnv->papszEnv[iVar], pchVar, cchVar)
590	&& ( pIntEnv->papszEnv[iVar][cchVar] == '='
591	\|\| pIntEnv->papszEnv[iVar][cchVar] == '\0') )
592	break;
593	if (iVar < pIntEnv->cVars)
594	{
595	/*
596	* Replace the current entry. Simple.
597	*/
598	RTMemFree(pIntEnv->papszEnv[iVar]);
599	pIntEnv->papszEnv[iVar] = pszEntry;
600	}
601	else
602	{
603	/*
604	* New variable, append it.
605	*/
606	Assert(pIntEnv->cVars == iVar);
607	rc = rtEnvIntAppend(pIntEnv, pszEntry);
608	}
609
610	RTENV_UNLOCK(pIntEnv);
611
612	if (RT_FAILURE(rc))
613	RTMemFree(pszEntry);
614	}
615	else
616	rc = VERR_NO_MEMORY;
617	}
618	return rc;
619	}
620
621
622	RTDECL(int) RTEnvSetEx(RTENV Env, const char pszVar, const char pszValue)
623	{
624	AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
625	AssertPtrReturn(pszValue, VERR_INVALID_POINTER);
626	size_t const cchVar = strlen(pszVar);
627	AssertReturn(cchVar > 0, VERR_ENV_INVALID_VAR_NAME);
628	char const pszEq = (char const )memchr(pszVar, '=', cchVar);
629	if (!pszEq)
630	{ /* likely */ }
631	else
632	{
633	AssertReturn(Env != RTENV_DEFAULT, VERR_ENV_INVALID_VAR_NAME);
634	PRTENVINTERNAL pIntEnv = Env;
635	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
636	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
637	AssertReturn(pIntEnv->fFirstEqual, VERR_ENV_INVALID_VAR_NAME);
638	AssertReturn(memchr(pszVar + 1, '=', cchVar - 1) == NULL, VERR_ENV_INVALID_VAR_NAME);
639	}
640
641	return rtEnvSetExWorker(Env, pszVar, cchVar, pszValue);
642	}
643	RT_EXPORT_SYMBOL(RTEnvSetEx);
644
645
646	RTDECL(int) RTEnvUnsetEx(RTENV Env, const char *pszVar)
647	{
648	AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
649	AssertReturn(*pszVar, VERR_ENV_INVALID_VAR_NAME);
650
651	int rc;
652	if (Env == RTENV_DEFAULT)
653	{
654	#ifdef RTENV_IMPLEMENTS_UTF8_DEFAULT_ENV_API
655	rc = RTEnvUnsetUtf8(pszVar);
656	#else
657	/*
658	* Since RTEnvUnset isn't UTF-8 clean and actually expects the strings
659	* to be in the current code page (codeset), we'll do the necessary
660	* conversions here.
661	*/
662	char *pszVarOtherCP;
663	rc = RTStrUtf8ToCurrentCP(&pszVarOtherCP, pszVar);
664	if (RT_SUCCESS(rc))
665	{
666	rc = RTEnvUnset(pszVarOtherCP);
667	RTStrFree(pszVarOtherCP);
668	}
669	#endif
670	}
671	else
672	{
673	PRTENVINTERNAL pIntEnv = Env;
674	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
675	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
676	const size_t cchVar = strlen(pszVar);
677	AssertReturn(cchVar > 0, VERR_ENV_INVALID_VAR_NAME);
678	AssertReturn(strchr(pIntEnv->fFirstEqual ? pszVar + 1 : pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
679
680	RTENV_LOCK(pIntEnv);
681
682	/*
683	* Remove all variable by the given name.
684	*/
685	rc = VINF_ENV_VAR_NOT_FOUND;
686	size_t iVar;
687	for (iVar = 0; iVar < pIntEnv->cVars; iVar++)
688	if ( !pIntEnv->pfnCompare(pIntEnv->papszEnv[iVar], pszVar, cchVar)
689	&& ( pIntEnv->papszEnv[iVar][cchVar] == '='
690	\|\| pIntEnv->papszEnv[iVar][cchVar] == '\0') )
691	{
692	if (!pIntEnv->fPutEnvBlock)
693	{
694	RTMemFree(pIntEnv->papszEnv[iVar]);
695	pIntEnv->cVars--;
696	if (pIntEnv->cVars > 0)
697	pIntEnv->papszEnv[iVar] = pIntEnv->papszEnv[pIntEnv->cVars];
698	pIntEnv->papszEnv[pIntEnv->cVars] = NULL;
699	}
700	else
701	{
702	/* Record this unset by keeping the variable without any equal sign. */
703	pIntEnv->papszEnv[iVar][cchVar] = '\0';
704	}
705	rc = VINF_SUCCESS;
706	/* no break, there could be more. */
707	}
708
709	/*
710	* If this is a change record, we may need to add it.
711	*/
712	if (rc == VINF_ENV_VAR_NOT_FOUND && pIntEnv->fPutEnvBlock)
713	{
714	char pszEntry = (char )RTMemDup(pszVar, cchVar + 1);
715	if (pszEntry)
716	{
717	rc = rtEnvIntAppend(pIntEnv, pszEntry);
718	if (RT_SUCCESS(rc))
719	rc = VINF_ENV_VAR_NOT_FOUND;
720	else
721	RTMemFree(pszEntry);
722	}
723	else
724	rc = VERR_NO_MEMORY;
725	}
726
727	RTENV_UNLOCK(pIntEnv);
728	}
729	return rc;
730
731	}
732	RT_EXPORT_SYMBOL(RTEnvUnsetEx);
733
734
735	RTDECL(int) RTEnvPutEx(RTENV Env, const char *pszVarEqualValue)
736	{
737	int rc;
738	AssertPtrReturn(pszVarEqualValue, VERR_INVALID_POINTER);
739	const char *pszEq = strchr(pszVarEqualValue, '=');
740	if ( pszEq == pszVarEqualValue
741	&& Env != RTENV_DEFAULT)
742	{
743	PRTENVINTERNAL pIntEnv = Env;
744	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
745	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
746	if (pIntEnv->fFirstEqual)
747	pszEq = strchr(pszVarEqualValue + 1, '=');
748	}
749	if (!pszEq)
750	rc = RTEnvUnsetEx(Env, pszVarEqualValue);
751	else
752	{
753	AssertReturn(pszEq != pszVarEqualValue, VERR_ENV_INVALID_VAR_NAME);
754	rc = rtEnvSetExWorker(Env, pszVarEqualValue, pszEq - pszVarEqualValue, pszEq + 1);
755	}
756	return rc;
757	}
758	RT_EXPORT_SYMBOL(RTEnvPutEx);
759
760
761	RTDECL(int) RTEnvGetEx(RTENV Env, const char pszVar, char pszValue, size_t cbValue, size_t *pcchActual)
762	{
763	AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
764	AssertPtrNullReturn(pszValue, VERR_INVALID_POINTER);
765	AssertPtrNullReturn(pcchActual, VERR_INVALID_POINTER);
766	AssertReturn(pcchActual \|\| (pszValue && cbValue), VERR_INVALID_PARAMETER);
767
768	if (pcchActual)
769	*pcchActual = 0;
770	int rc;
771	if (Env == RTENV_DEFAULT)
772	{
773	#ifdef RTENV_IMPLEMENTS_UTF8_DEFAULT_ENV_API
774	rc = RTEnvGetUtf8(pszVar, pszValue, cbValue, pcchActual);
775	#else
776	/*
777	* Since RTEnvGet isn't UTF-8 clean and actually expects the strings
778	* to be in the current code page (codeset), we'll do the necessary
779	* conversions here.
780	*/
781	char *pszVarOtherCP;
782	rc = RTStrUtf8ToCurrentCP(&pszVarOtherCP, pszVar);
783	if (RT_SUCCESS(rc))
784	{
785	const char *pszValueOtherCP = RTEnvGet(pszVarOtherCP);
786	RTStrFree(pszVarOtherCP);
787	if (pszValueOtherCP)
788	{
789	char *pszValueUtf8;
790	rc = RTStrCurrentCPToUtf8(&pszValueUtf8, pszValueOtherCP);
791	if (RT_SUCCESS(rc))
792	{
793	rc = VINF_SUCCESS;
794	size_t cch = strlen(pszValueUtf8);
795	if (pcchActual)
796	*pcchActual = cch;
797	if (pszValue && cbValue)
798	{
799	if (cch < cbValue)
800	memcpy(pszValue, pszValueUtf8, cch + 1);
801	else
802	rc = VERR_BUFFER_OVERFLOW;
803	}
804	RTStrFree(pszValueUtf8);
805	}
806	}
807	else
808	rc = VERR_ENV_VAR_NOT_FOUND;
809	}
810	#endif
811	}
812	else
813	{
814	PRTENVINTERNAL pIntEnv = Env;
815	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
816	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
817	const size_t cchVar = strlen(pszVar);
818	AssertReturn(cchVar > 0, VERR_ENV_INVALID_VAR_NAME);
819	AssertReturn(strchr(pIntEnv->fFirstEqual ? pszVar + 1 : pszVar, '=') == NULL, VERR_ENV_INVALID_VAR_NAME);
820
821	RTENV_LOCK(pIntEnv);
822
823	/*
824	* Locate the first variable and return it to the caller.
825	*/
826	rc = VERR_ENV_VAR_NOT_FOUND;
827	size_t iVar;
828	for (iVar = 0; iVar < pIntEnv->cVars; iVar++)
829	if (!pIntEnv->pfnCompare(pIntEnv->papszEnv[iVar], pszVar, cchVar))
830	{
831	if (pIntEnv->papszEnv[iVar][cchVar] == '=')
832	{
833	rc = VINF_SUCCESS;
834	const char *pszValueOrg = pIntEnv->papszEnv[iVar] + cchVar + 1;
835	size_t cch = strlen(pszValueOrg);
836	if (pcchActual)
837	*pcchActual = cch;
838	if (pszValue && cbValue)
839	{
840	if (cch < cbValue)
841	memcpy(pszValue, pszValueOrg, cch + 1);
842	else
843	rc = VERR_BUFFER_OVERFLOW;
844	}
845	break;
846	}
847	if (pIntEnv->papszEnv[iVar][cchVar] == '\0')
848	{
849	Assert(pIntEnv->fPutEnvBlock);
850	rc = VERR_ENV_VAR_UNSET;
851	break;
852	}
853	}
854
855	RTENV_UNLOCK(pIntEnv);
856	}
857	return rc;
858	}
859	RT_EXPORT_SYMBOL(RTEnvGetEx);
860
861
862	RTDECL(bool) RTEnvExistEx(RTENV Env, const char *pszVar)
863	{
864	AssertPtrReturn(pszVar, false);
865
866	bool fExists = false;
867	if (Env == RTENV_DEFAULT)
868	{
869	#ifdef RTENV_IMPLEMENTS_UTF8_DEFAULT_ENV_API
870	fExists = RTEnvExistsUtf8(pszVar);
871	#else
872	/*
873	* Since RTEnvExist isn't UTF-8 clean and actually expects the strings
874	* to be in the current code page (codeset), we'll do the necessary
875	* conversions here.
876	*/
877	char *pszVarOtherCP;
878	int rc = RTStrUtf8ToCurrentCP(&pszVarOtherCP, pszVar);
879	if (RT_SUCCESS(rc))
880	{
881	fExists = RTEnvExist(pszVarOtherCP);
882	RTStrFree(pszVarOtherCP);
883	}
884	#endif
885	}
886	else
887	{
888	PRTENVINTERNAL pIntEnv = Env;
889	AssertPtrReturn(pIntEnv, false);
890	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, false);
891	const size_t cchVar = strlen(pszVar);
892	AssertReturn(cchVar > 0, false);
893	AssertReturn(strchr(pIntEnv->fFirstEqual ? pszVar + 1 : pszVar, '=') == NULL, false);
894
895	RTENV_LOCK(pIntEnv);
896
897	/*
898	* Simple search.
899	*/
900	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
901	if (!pIntEnv->pfnCompare(pIntEnv->papszEnv[iVar], pszVar, cchVar))
902	{
903	if (pIntEnv->papszEnv[iVar][cchVar] == '=')
904	{
905	fExists = true;
906	break;
907	}
908	if (pIntEnv->papszEnv[iVar][cchVar] == '\0')
909	break;
910	}
911
912	RTENV_UNLOCK(pIntEnv);
913	}
914	return fExists;
915	}
916	RT_EXPORT_SYMBOL(RTEnvExistEx);
917
918
919	RTDECL(char const * const *) RTEnvGetExecEnvP(RTENV Env)
920	{
921	const char * const *papszRet;
922	if (Env == RTENV_DEFAULT)
923	{
924	/** @todo fix this API it's fundamentally wrong! */
925	papszRet = rtEnvDefault();
926	if (!papszRet)
927	{
928	static const char * const s_papszDummy[2] = { NULL, NULL };
929	papszRet = &s_papszDummy[0];
930	}
931	}
932	else
933	{
934	PRTENVINTERNAL pIntEnv = Env;
935	AssertPtrReturn(pIntEnv, NULL);
936	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, NULL);
937
938	RTENV_LOCK(pIntEnv);
939
940	/*
941	* Free any old envp.
942	*/
943	if (pIntEnv->papszEnvOtherCP)
944	{
945	for (size_t iVar = 0; pIntEnv->papszEnvOtherCP[iVar]; iVar++)
946	{
947	RTStrFree(pIntEnv->papszEnvOtherCP[iVar]);
948	pIntEnv->papszEnvOtherCP[iVar] = NULL;
949	}
950	RTMemFree(pIntEnv->papszEnvOtherCP);
951	pIntEnv->papszEnvOtherCP = NULL;
952	}
953
954	/*
955	* Construct a new envp with the strings in the process code set.
956	*/
957	char **papsz;
958	papszRet = pIntEnv->papszEnvOtherCP = papsz = (char *)RTMemAlloc(sizeof(char ) * (pIntEnv->cVars + 1));
959	if (papsz)
960	{
961	papsz[pIntEnv->cVars] = NULL;
962	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
963	{
964	int rc = RTStrUtf8ToCurrentCP(&papsz[iVar], pIntEnv->papszEnv[iVar]);
965	if (RT_FAILURE(rc))
966	{
967	/* RTEnvDestroy / we cleans up later. */
968	papsz[iVar] = NULL;
969	AssertRC(rc);
970	papszRet = NULL;
971	break;
972	}
973	}
974	}
975
976	RTENV_UNLOCK(pIntEnv);
977	}
978	return papszRet;
979	}
980	RT_EXPORT_SYMBOL(RTEnvGetExecEnvP);
981
982
983	/**
984	* RTSort callback for comparing two environment variables.
985	*
986	* @returns -1, 0, 1. See PFNRTSORTCMP.
987	* @param pvElement1 Variable 1.
988	* @param pvElement2 Variable 2.
989	* @param pvUser Ignored.
990	*/
991	static DECLCALLBACK(int) rtEnvSortCompare(const void pvElement1, const void pvElement2, void *pvUser)
992	{
993	NOREF(pvUser);
994	int iDiff = strcmp((const char )pvElement1, (const char )pvElement2);
995	if (iDiff < 0)
996	iDiff = -1;
997	else if (iDiff > 0)
998	iDiff = 1;
999	return iDiff;
1000	}
1001
1002
1003	RTDECL(int) RTEnvQueryUtf16Block(RTENV hEnv, PRTUTF16 *ppwszzBlock)
1004	{
1005	RTENV hClone = NIL_RTENV;
1006	PRTENVINTERNAL pIntEnv;
1007	int rc;
1008
1009	/*
1010	* Validate / simplify input.
1011	*/
1012	if (hEnv == RTENV_DEFAULT)
1013	{
1014	rc = RTEnvClone(&hClone, RTENV_DEFAULT);
1015	if (RT_FAILURE(rc))
1016	return rc;
1017	pIntEnv = hClone;
1018	}
1019	else
1020	{
1021	pIntEnv = hEnv;
1022	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
1023	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
1024	rc = VINF_SUCCESS;
1025	}
1026
1027	RTENV_LOCK(pIntEnv);
1028
1029	/*
1030	* Sort it first.
1031	*/
1032	RTSortApvShell((void **)pIntEnv->papszEnv, pIntEnv->cVars, rtEnvSortCompare, pIntEnv);
1033
1034	/*
1035	* Calculate the size.
1036	*/
1037	size_t cwc;
1038	size_t cwcTotal = 2;
1039	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
1040	{
1041	rc = RTStrCalcUtf16LenEx(pIntEnv->papszEnv[iVar], RTSTR_MAX, &cwc);
1042	AssertRCBreak(rc);
1043	cwcTotal += cwc + 1;
1044	}
1045
1046	PRTUTF16 pwszzBlock = NULL;
1047	if (RT_SUCCESS(rc))
1048	{
1049	/*
1050	* Perform the conversion.
1051	*/
1052	PRTUTF16 pwszz = pwszzBlock = (PRTUTF16)RTMemAlloc(cwcTotal * sizeof(RTUTF16));
1053	if (pwszz)
1054	{
1055	size_t cwcLeft = cwcTotal;
1056	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
1057	{
1058	rc = RTStrToUtf16Ex(pIntEnv->papszEnv[iVar], RTSTR_MAX,
1059	&pwszz, cwcTotal - (pwszz - pwszzBlock), &cwc);
1060	AssertRCBreak(rc);
1061	pwszz += cwc + 1;
1062	cwcLeft -= cwc + 1;
1063	AssertBreakStmt(cwcLeft >= 2, rc = VERR_INTERNAL_ERROR_3);
1064	}
1065	AssertStmt(cwcLeft == 2 \|\| RT_FAILURE(rc), rc = VERR_INTERNAL_ERROR_2);
1066	if (RT_SUCCESS(rc))
1067	{
1068	pwszz[0] = '\0';
1069	pwszz[1] = '\0';
1070	}
1071	else
1072	{
1073	RTMemFree(pwszzBlock);
1074	pwszzBlock = NULL;
1075	}
1076	}
1077	else
1078	rc = VERR_NO_MEMORY;
1079	}
1080
1081	RTENV_UNLOCK(pIntEnv);
1082
1083	if (hClone != NIL_RTENV)
1084	RTEnvDestroy(hClone);
1085	if (RT_SUCCESS(rc))
1086	*ppwszzBlock = pwszzBlock;
1087	return rc;
1088	}
1089	RT_EXPORT_SYMBOL(RTEnvQueryUtf16Block);
1090
1091
1092	RTDECL(void) RTEnvFreeUtf16Block(PRTUTF16 pwszzBlock)
1093	{
1094	RTMemFree(pwszzBlock);
1095	}
1096	RT_EXPORT_SYMBOL(RTEnvFreeUtf16Block);
1097
1098
1099	RTDECL(int) RTEnvQueryUtf8Block(RTENV hEnv, bool fSorted, char *ppszzBlock, size_t pcbBlock)
1100	{
1101	RTENV hClone = NIL_RTENV;
1102	PRTENVINTERNAL pIntEnv;
1103	int rc;
1104
1105	/*
1106	* Validate / simplify input.
1107	*/
1108	if (hEnv == RTENV_DEFAULT)
1109	{
1110	rc = RTEnvClone(&hClone, RTENV_DEFAULT);
1111	if (RT_FAILURE(rc))
1112	return rc;
1113	pIntEnv = hClone;
1114	}
1115	else
1116	{
1117	pIntEnv = hEnv;
1118	AssertPtrReturn(pIntEnv, VERR_INVALID_HANDLE);
1119	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
1120	rc = VINF_SUCCESS;
1121	}
1122
1123	RTENV_LOCK(pIntEnv);
1124
1125	/*
1126	* Sort it, if requested.
1127	*/
1128	if (fSorted)
1129	RTSortApvShell((void **)pIntEnv->papszEnv, pIntEnv->cVars, rtEnvSortCompare, pIntEnv);
1130
1131	/*
1132	* Calculate the size. We add one extra terminator just to be on the safe side.
1133	*/
1134	size_t cbBlock = 2;
1135	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
1136	cbBlock += strlen(pIntEnv->papszEnv[iVar]) + 1;
1137
1138	if (pcbBlock)
1139	*pcbBlock = cbBlock - 1;
1140
1141	/*
1142	* Allocate memory and copy out the variables.
1143	*/
1144	char *pszzBlock;
1145	char pszz = pszzBlock = (char )RTMemAlloc(cbBlock);
1146	if (pszz)
1147	{
1148	size_t cbLeft = cbBlock;
1149	for (size_t iVar = 0; iVar < pIntEnv->cVars; iVar++)
1150	{
1151	size_t cb = strlen(pIntEnv->papszEnv[iVar]) + 1;
1152	AssertBreakStmt(cb + 2 <= cbLeft, rc = VERR_INTERNAL_ERROR_3);
1153	memcpy(pszz, pIntEnv->papszEnv[iVar], cb);
1154	pszz += cb;
1155	cbLeft -= cb;
1156	}
1157	if (RT_SUCCESS(rc))
1158	{
1159	pszz[0] = '\0';
1160	pszz[1] = '\0'; /* The extra one. */
1161	}
1162	else
1163	{
1164	RTMemFree(pszzBlock);
1165	pszzBlock = NULL;
1166	}
1167	}
1168	else
1169	rc = VERR_NO_MEMORY;
1170
1171	RTENV_UNLOCK(pIntEnv);
1172
1173	if (hClone != NIL_RTENV)
1174	RTEnvDestroy(hClone);
1175	if (RT_SUCCESS(rc))
1176	*ppszzBlock = pszzBlock;
1177	return rc;
1178	}
1179	RT_EXPORT_SYMBOL(RTEnvQueryUtf8Block);
1180
1181
1182	RTDECL(void) RTEnvFreeUtf8Block(char *pszzBlock)
1183	{
1184	RTMemFree(pszzBlock);
1185	}
1186	RT_EXPORT_SYMBOL(RTEnvFreeUtf8Block);
1187
1188
1189	RTDECL(uint32_t) RTEnvCountEx(RTENV hEnv)
1190	{
1191	PRTENVINTERNAL pIntEnv = hEnv;
1192	AssertPtrReturn(pIntEnv, UINT32_MAX);
1193	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, UINT32_MAX);
1194
1195	RTENV_LOCK(pIntEnv);
1196	uint32_t cVars = (uint32_t)pIntEnv->cVars;
1197	RTENV_UNLOCK(pIntEnv);
1198
1199	return cVars;
1200	}
1201	RT_EXPORT_SYMBOL(RTEnvCountEx);
1202
1203
1204	RTDECL(int) RTEnvGetByIndexEx(RTENV hEnv, uint32_t iVar, char pszVar, size_t cbVar, char pszValue, size_t cbValue)
1205	{
1206	PRTENVINTERNAL pIntEnv = hEnv;
1207	AssertPtrReturn(pIntEnv, UINT32_MAX);
1208	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, UINT32_MAX);
1209	if (cbVar)
1210	AssertPtrReturn(pszVar, VERR_INVALID_POINTER);
1211	if (cbValue)
1212	AssertPtrReturn(pszValue, VERR_INVALID_POINTER);
1213
1214	RTENV_LOCK(pIntEnv);
1215
1216	int rc;
1217	if (iVar < pIntEnv->cVars)
1218	{
1219	const char *pszSrcVar = pIntEnv->papszEnv[iVar];
1220	const char *pszSrcValue = strchr(pszSrcVar, '=');
1221	if (pszSrcValue == pszSrcVar && pIntEnv->fFirstEqual)
1222	pszSrcValue = strchr(pszSrcVar + 1, '=');
1223	bool fHasEqual = pszSrcValue != NULL;
1224	if (pszSrcValue)
1225	{
1226	pszSrcValue++;
1227	rc = VINF_SUCCESS;
1228	}
1229	else
1230	{
1231	pszSrcValue = strchr(pszSrcVar, '\0');
1232	rc = VINF_ENV_VAR_UNSET;
1233	}
1234	if (cbVar)
1235	{
1236	int rc2 = RTStrCopyEx(pszVar, cbVar, pszSrcVar, pszSrcValue - pszSrcVar - fHasEqual);
1237	if (RT_FAILURE(rc2))
1238	rc = rc2;
1239	}
1240	if (cbValue)
1241	{
1242	int rc2 = RTStrCopy(pszValue, cbValue, pszSrcValue);
1243	if (RT_FAILURE(rc2) && RT_SUCCESS(rc))
1244	rc = rc2;
1245	}
1246	}
1247	else
1248	rc = VERR_ENV_VAR_NOT_FOUND;
1249
1250	RTENV_UNLOCK(pIntEnv);
1251
1252	return rc;
1253	}
1254	RT_EXPORT_SYMBOL(RTEnvGetByIndexEx);
1255
1256
1257	RTDECL(const char *) RTEnvGetByIndexRawEx(RTENV hEnv, uint32_t iVar)
1258	{
1259	PRTENVINTERNAL pIntEnv = hEnv;
1260	AssertPtrReturn(pIntEnv, NULL);
1261	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, NULL);
1262
1263	RTENV_LOCK(pIntEnv);
1264
1265	const char *pszRet;
1266	if (iVar < pIntEnv->cVars)
1267	pszRet = pIntEnv->papszEnv[iVar];
1268	else
1269	pszRet = NULL;
1270
1271	RTENV_UNLOCK(pIntEnv);
1272
1273	return pszRet;
1274	}
1275	RT_EXPORT_SYMBOL(RTEnvGetByIndexRawEx);
1276
1277
1278	RTDECL(int) RTEnvCreateChangeRecord(PRTENV phEnv)
1279	{
1280	AssertPtrReturn(phEnv, VERR_INVALID_POINTER);
1281	#ifdef RTENV_ALLOW_EQUAL_FIRST_IN_VAR
1282	return rtEnvCreate(phEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, true /fPutEnvBlock/, true /fFirstEqual/);
1283	#else
1284	return rtEnvCreate(phEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, true /fPutEnvBlock/, false /fFirstEqual/);
1285	#endif
1286	}
1287	RT_EXPORT_SYMBOL(RTEnvCreateChangeRecord);
1288
1289
1290	RTDECL(int) RTEnvCreateChangeRecordEx(PRTENV phEnv, uint32_t fFlags)
1291	{
1292	AssertPtrReturn(phEnv, VERR_INVALID_POINTER);
1293	AssertReturn(!(fFlags & ~RTENV_CREATE_F_VALID_MASK), VERR_INVALID_FLAGS);
1294	return rtEnvCreate(phEnv, RTENV_GROW_SIZE, true /fCaseSensitive/, true /fPutEnvBlock/,
1295	RT_BOOL(fFlags & RTENV_CREATE_F_ALLOW_EQUAL_FIRST_IN_VAR));
1296	}
1297	RT_EXPORT_SYMBOL(RTEnvCreateChangeRecord);
1298
1299
1300	RTDECL(bool) RTEnvIsChangeRecord(RTENV hEnv)
1301	{
1302	if (hEnv == RTENV_DEFAULT)
1303	return false;
1304
1305	PRTENVINTERNAL pIntEnv = hEnv;
1306	AssertPtrReturn(pIntEnv, false);
1307	AssertReturn(pIntEnv->u32Magic == RTENV_MAGIC, false);
1308	return pIntEnv->fPutEnvBlock;
1309	}
1310	RT_EXPORT_SYMBOL(RTEnvIsChangeRecord);
1311
1312
1313	RTDECL(int) RTEnvApplyChanges(RTENV hEnvDst, RTENV hEnvChanges)
1314	{
1315	PRTENVINTERNAL pIntEnvChanges = hEnvChanges;
1316	AssertPtrReturn(pIntEnvChanges, VERR_INVALID_HANDLE);
1317	AssertReturn(pIntEnvChanges->u32Magic == RTENV_MAGIC, VERR_INVALID_HANDLE);
1318
1319	/** @todo lock validator trouble ahead here! */
1320	RTENV_LOCK(pIntEnvChanges);
1321
1322	int rc = VINF_SUCCESS;
1323	for (uint32_t iChange = 0; iChange < pIntEnvChanges->cVars && RT_SUCCESS(rc); iChange++)
1324	rc = RTEnvPutEx(hEnvDst, pIntEnvChanges->papszEnv[iChange]);
1325
1326	RTENV_UNLOCK(pIntEnvChanges);
1327
1328	return rc;
1329	}
1330	RT_EXPORT_SYMBOL(RTEnvApplyChanges);
1331

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source: vbox/trunk/src/VBox/Runtime/generic/env-generic.cpp@ 86697

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