source: trunk/src/win32k/lib/libWin32kSetEnvironment.c@ 6213

Last change on this file since 6213 was 6213, checked in by bird, 24 years ago

Added SetEnvironment API.
File size: 3.3 KB
Line 
1/* $Id: libWin32kSetEnvironment.c,v 1.1 2001-07-08 02:51:24 bird Exp $
2 *
3 * libWin32kSetEnvironment - Set the Odin32 environment block pointer for the
4 * current process.
5 *
6 * Copyright (c) 2001 knut st. osmundsen (kosmunds@csc.no)
7 *
8 * Project Odin Software License can be found in LICENSE.TXT
9 *
10 */
11
12
13/*******************************************************************************
14* Header Files *
15*******************************************************************************/
16#define INCL_DOSERRORS
17#define INCL_DOSFILEMGR
18#define INCL_DOSDEVICES
19
20
21/*******************************************************************************
22* Internal Functions *
23*******************************************************************************/
24#include <os2.h>
25#include "win32k.h"
26#include "libPrivate.h"
27
28
29/**
30 * Sets the environment block pointer for a given process.
31 * @returns OS2 returncode.
32 * @param pszzEnvironment Pointer to environment block.
33 * @param cchEnvironment Size of the environment block.
34 * If 0 we'll do a DosQueryMem on the address
35 * to get the size of the memory block.
36 * @param pid Process id.
37 * @status completely implelemented.
38 * @author knut st. osmundsen (kosmunds@csc.no)
39 */
40APIRET APIENTRY libWin32kSetEnvironment(PSZ pszzEnvironment, ULONG cchEnvironment, PID pid)
41{
42 APIRET rc;
43
44 /*
45 * Simple validation.
46 */
47 if ( pszzEnvironment < (PSZ)0x10000
48 || pszzEnvironment >= (PSZ)0xc0000000
49 || cchEnvironment > 1024*1024 /* Max 1MB environment. */
50 || pid >= (PID)0x10000 /* pid range check. */
51 )
52 return ERROR_INVALID_PARAMETER;
53
54 /*
55 * Query object size if not given.
56 */
57 if (cchEnvironment == 0)
58 {
59 ULONG flFlags = ~0UL;
60 ULONG cb = ~0UL;
61 rc = DosQueryMem(pszzEnvironment, &cb, &flFlags);
62 if (rc || cb <= 0x1000) /* DosQueryMem was broken on some Warp Fixpacks (FP9 for instance). */
63 rc = DosQueryMem(pszzEnvironment, &cb, &flFlags);
64 if (rc)
65 return rc;
66 cchEnvironment = cb;
67 }
68
69 /*
70 * Check that we're initiated.
71 */
72 if (fInited)
73 {
74 /*
75 * Build parameters and call win32k.
76 */
77 K32SETENVIRONMENT Param;
78 ULONG cbParam = sizeof(Param);
79 ULONG cbData = 0UL;
80
81 Param.hdr.cb = sizeof(Param);
82 Param.hdr.rc = ERROR_NOT_SUPPORTED;
83 Param.pszzEnvironment = pszzEnvironment;
84 Param.cchEnvironment = cchEnvironment;
85 Param.pid = pid;
86
87 if (usCGSelector)
88 return libCallThruCallGate(K32_SETENVIRONMENT, &Param);
89 rc = DosDevIOCtl(hWin32k,
90 IOCTL_W32K_K32,
91 K32_SETENVIRONMENT,
92 &Param, sizeof(Param), &cbParam,
93 "", 1, &cbData);
94
95 if (rc == NO_ERROR)
96 rc = Param.hdr.rc;
97 }
98 else
99 rc = ERROR_INIT_ROUTINE_FAILED;
100
101 return rc;
102}
103
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