source: trunk/src/win32k/k32/k32SetEnvironment.cpp@ 10367

Last change on this file since 10367 was 6296, checked in by bird, 24 years ago

Use PTDA not PID and allways take loader sem.
File size: 3.7 KB
Line 
1/* $Id: k32SetEnvironment.cpp,v 1.2 2001-07-10 16:39:17 bird Exp $
2 *
3 * k32SetEnvironment - Sets the Odin32 environment for a process.
4 *
5 * Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.no)
6 *
7 * Project Odin Software License can be found in LICENSE.TXT
8 *
9 */
10
11
12/*******************************************************************************
13* Defined Constants And Macros *
14*******************************************************************************/
15#define INCL_DOSERRORS
16#define INCL_OS2KRNL_TK
17#define INCL_OS2KRNL_PTDA
18#define INCL_OS2KRNL_SEM
19#define INCL_OS2KRNL_LDR
20#define NO_WIN32K_LIB_FUNCTIONS
21
22
23/*******************************************************************************
24* Header Files *
25*******************************************************************************/
26#include <os2.h>
27#include <memory.h>
28#include "devSegDf.h" /* Win32k segment definitions. */
29#include "OS2Krnl.h"
30#include "win32k.h"
31#include "k32.h"
32#include "options.h"
33#include "dev32.h"
34#include "dev32hlp.h"
35#include "log.h"
36#include "macros.h"
37#include "avl.h"
38#include "PerTaskW32kData.h"
39
40
41
42/**
43 * Set the Odin32 environment pointer for a process.
44 * @returns NO_ERROR on success.
45 * Appropriate error code on failure.
46 * @param pszzEnvironment Pointer to environment block for the process identified by pid.
47 * @param cchEnvironment Size of the environment block.
48 * @param pid Process Id to set environment for.
49 * Currently limited to the current process (if pszzEnvironment != NULL).
50 * @status Completely implemented.
51 * @author knut st. osmundsen (knut.stange.osmundsen@mynd.no)
52 * @remark This is called by the kernel32 initterm proc.
53 * It should be called by any environment replacement later...
54 */
55APIRET k32SetEnvironment(PSZ pszzEnvironment, ULONG cchEnvironment, PID pid)
56{
57 APIRET rc;
58 PPTD pptd;
59
60 /*
61 * Validate pid a little bit...
62 */
63 if (pid >= 0x10000)
64 {
65 kprintf(("k32SetEnvironment: invalid pid=%x\n", pid));
66 return ERROR_INVALID_PARAMETER;
67 }
68
69 if (pid != 0)
70 {
71 kprintf(("k32SetEnvironment: currently only supported for current pid. pid=%x\n", pid));
72 return ERROR_INVALID_PARAMETER;
73 }
74
75
76 /*
77 * Take Loader semaphore as that currently protects everything in this driver...
78 */
79 rc = LDRRequestSem();
80 if (rc != NO_ERROR)
81 {
82 kprintf(("k32SetEnvironment: LDRRequestSem failed with rc = %d\n", rc));
83 return rc;
84 }
85
86
87 /*
88 * Get Per Task Data and try set next environment pointer.
89 */
90 pptd = GetTaskData(ptdaGetCur(), TRUE);
91 if (pptd)
92 {
93 if (*(PULONG)&pptd->lockOdin32Env)
94 {
95 D32Hlp_VMUnLock(&pptd->lockOdin32Env);
96 memset(&pptd->lockOdin32Env, 0, sizeof(pptd->lockOdin32Env));
97 }
98 pptd->pszzOdin32Env = NULL;
99 if (pptd->cUsage != 0 && pszzEnvironment != NULL && cchEnvironment != 0)
100 {
101 /*
102 * Lock the memory (so we don't block or trap during environment searchs).
103 */
104 rc = D32Hlp_VMLock2(pszzEnvironment, cchEnvironment,
105 VMDHL_LONG | VMDHL_WRITE, &pptd->lockOdin32Env);
106 if (rc == NO_ERROR)
107 pptd->pszzOdin32Env = pszzEnvironment;
108 else
109 {
110 kprintf(("k32SetEnvironment: VMLock2 failed with rc=%d\n", rc));
111 memset(&pptd->lockOdin32Env, 0, sizeof(pptd->lockOdin32Env));
112 }
113 }
114 else
115 rc = NO_ERROR;
116 }
117 else
118 rc = ERROR_NOT_ENOUGH_MEMORY;
119
120 LDRClearSem();
121 return rc;
122}
123
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