kerneltest/e32utils/setcap/main.cpp
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     1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).
       
     2 // All rights reserved.
       
     3 // This component and the accompanying materials are made available
       
     4 // under the terms of the License "Eclipse Public License v1.0"
       
     5 // which accompanies this distribution, and is available
       
     6 // at the URL "http://www.eclipse.org/legal/epl-v10.html".
       
     7 //
       
     8 // Initial Contributors:
       
     9 // Nokia Corporation - initial contribution.
       
    10 //
       
    11 // Contributors:
       
    12 //
       
    13 // Description:
       
    14 // e32utils\setcap\main.cpp
       
    15 // SETCAP.EXE
       
    16 // Makes a copy of an executable file and gives it the specified capabilities.
       
    17 // It may also, optionally, modify the Secure or Vendor IDs.
       
    18 // This runs under the Symbian OS - it is not a native PC utility.
       
    19 // Command line syntax:
       
    20 // SETCAP source_exe capability [-SID secureId] [-VID vendorId] [destination_path]
       
    21 // source_exe         Name and path of an executable file (default path is Z:\SYS\BIN\)
       
    22 // capability         Hexadecimal value for capabilities
       
    23 // secureId			 Optional hexadecimal value of secure ID
       
    24 // vendorId			 Optional hexadecimal value of vendor ID
       
    25 // destination_path   Optional name and path to copy the exe to
       
    26 // (defaults to C:\SYS\BIN\source_exe_name)
       
    27 // Notes
       
    28 // 1.  The 'capability' command line argument is the hexadecimal value of the
       
    29 // capabilities when they are represented as a bit-field. E.g. the 3 capabilities
       
    30 // LocalServices, ReadUserData and WriteUserData would together have a value of:
       
    31 // (1<<ECapabilityLocalServices) | (<<ECapabilityReadUserData) | (1<<ECapabilityWriteUserData)
       
    32 // Which in hexadecimal is '1c000'
       
    33 // If the value supplied includes capabilities which aren't supported by the current
       
    34 // OS version, then these are ignored and not added to the file.
       
    35 // 2.  If the source executable is in ROM it must be a RAM executable image, not an
       
    36 // execute-in-place image. I.e. its entry in an OBY file must start with "data=" and
       
    37 // not "file=".
       
    38 // For OBY files generated automatically by "ABLD ROMFILE" this needs to be achieved by
       
    39 // using lines similar to the following in the executables MMP file:
       
    40 // ROMTARGET    // Empty ROM path means don't include normal execute-in-place file
       
    41 // RAMTARGET \sys\bin\    // Target path (in ROM) for RAM executable image
       
    42 // 3.  The Symbian OS only allows one binary file with a given name; the name doesn't
       
    43 // include file path or extension. This means if SETCAP is used to make a copy of a
       
    44 // binary which is already loaded then the copy will not get loaded when used with
       
    45 // RProcess::Create(), instead the already loaded version will be used. To avoid this,
       
    46 // use SETCAP to give the copy a different name. E.g. "SETCAP test.exe 1234 test2.exe"
       
    47 // 
       
    48 //
       
    49 
       
    50 /**
       
    51  @file
       
    52 */
       
    53 
       
    54 #include "setcap.h"
       
    55 
       
    56 #include <f32file.h>
       
    57 
       
    58 TParse SourceName;
       
    59 TParse DestinationName;
       
    60 RFs Fs;
       
    61 
       
    62 #ifdef __WINS__
       
    63 
       
    64 TInt DoIt()
       
    65 	{
       
    66 	TInt  r;
       
    67 
       
    68 	TBuf<MAX_PATH> sName;
       
    69 	r = MapEmulatedFileName(sName, SourceName.NameAndExt());
       
    70 	if(r!=KErrNone)
       
    71 		return r;
       
    72 
       
    73 	TBuf<MAX_PATH> dName;
       
    74 	r = MapEmulatedFileName(dName, DestinationName.FullName());
       
    75 	if(r!=KErrNone)
       
    76 		return r;
       
    77 
       
    78 	if(!Emulator::CopyFile((LPCTSTR)sName.PtrZ(),(LPCTSTR)dName.PtrZ(),FALSE))
       
    79 		return KErrGeneral;
       
    80 
       
    81 	HANDLE hFile=Emulator::CreateFile((LPCTSTR)dName.PtrZ(),GENERIC_READ|GENERIC_WRITE,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,NULL);
       
    82 	if (hFile==INVALID_HANDLE_VALUE)
       
    83 		return KErrArgument;
       
    84 
       
    85 	return SetCap(hFile);
       
    86 	}
       
    87 
       
    88 #else // Not WINS
       
    89 
       
    90 #include <f32file.h>
       
    91 
       
    92 RFile Source;
       
    93 RFile Destination;
       
    94 
       
    95 TInt DoIt()
       
    96 	{
       
    97 	TInt r;
       
    98 
       
    99 	r=Source.Open(Fs,SourceName.FullName(),EFileRead);
       
   100 	if(r!=KErrNone)
       
   101 		return r;
       
   102 
       
   103 	r = Destination.Replace(Fs,DestinationName.FullName(),EFileWrite);
       
   104 	if(r!=KErrNone)
       
   105 		return r;
       
   106 
       
   107 	TUint8* buffer;
       
   108 	const TInt KBufferSize = 0x10000;
       
   109 
       
   110 	buffer = (TUint8*)User::Alloc(KBufferSize);
       
   111 	if(!buffer)
       
   112 		return KErrNoMemory;
       
   113 
       
   114 	TPtr8 p(buffer,KBufferSize,KBufferSize);
       
   115 	TInt n = 0;
       
   116 	while (r==KErrNone)
       
   117 		{
       
   118 		r = Source.Read(p);
       
   119 		if(r!=KErrNone || p.Size()==0)
       
   120 			break;
       
   121 		if (n==0)
       
   122 			{
       
   123 			// first block contains header
       
   124 			if ((TUint)p.Size() < sizeof(E32ImageHeader))
       
   125 				{
       
   126 				r = KErrCorrupt;
       
   127 				break;
       
   128 				}
       
   129 			E32ImageHeader* h = (E32ImageHeader*)buffer;
       
   130 			r = SetCap(h);
       
   131 			}
       
   132 		if (r==KErrNone)
       
   133 			r = Destination.Write(p);
       
   134 		++n;
       
   135 		}
       
   136 
       
   137 	delete buffer;
       
   138 
       
   139 	Source.Close();
       
   140 	Destination.Close();
       
   141 
       
   142 	return r;
       
   143 	}
       
   144 
       
   145 #endif
       
   146 
       
   147 _LIT(KDefaultSourcePath,"z:\\sys\\bin\\");
       
   148 _LIT(KDefaultDestinationPath,"?:\\sys\\bin\\");
       
   149 _LIT(KSIDOption,"-SID");
       
   150 _LIT(KVIDOption,"-VID");
       
   151 
       
   152 TInt ParseCommandLine()
       
   153 	{
       
   154 	TBuf<256> c;
       
   155 	User::CommandLine(c);
       
   156 
       
   157 	// Get exe name
       
   158 	TLex l(c);
       
   159 	if(SourceName.SetNoWild(l.NextToken(),0,&KDefaultSourcePath)!=KErrNone)
       
   160 		return KErrArgument;
       
   161 
       
   162 	// Get capability
       
   163 	TLex cl(l.NextToken());
       
   164 	if(cl.Val((TInt64&)Capability,EHex)!=KErrNone)
       
   165 		return KErrArgument;
       
   166 
       
   167 	// Mask out unsupported capabilities
       
   168 	TCapabilitySet all;
       
   169 	all.SetAllSupported();
       
   170 	((TCapabilitySet&)Capability).Intersection(all);
       
   171 
       
   172 	// We always update capabilities in the headers
       
   173 	CapabilitySet = ETrue;
       
   174 
       
   175 	// Get options
       
   176 	SecureIdSet = EFalse;
       
   177 	VendorIdSet = EFalse;
       
   178 	TPtrC nextToken;
       
   179 	for (;;)
       
   180 		{
       
   181 		nextToken.Set(l.NextToken());
       
   182 		if (nextToken == KSIDOption)
       
   183 			{
       
   184 			// SID specified
       
   185 			nextToken.Set(l.NextToken());
       
   186 			if (nextToken == KNullDesC)
       
   187 				return KErrArgument;				
       
   188 			TLex sl(nextToken);
       
   189 			if(sl.Val(SecureId.iId,EHex)!=KErrNone)
       
   190 				return KErrArgument;
       
   191 			SecureIdSet = ETrue;
       
   192 			}
       
   193 		else if (nextToken == KVIDOption)
       
   194 			{
       
   195 			// VID specified
       
   196 			nextToken.Set(l.NextToken());
       
   197 			if (nextToken == KNullDesC)
       
   198 				return KErrArgument;				
       
   199 			TLex sl(nextToken);
       
   200 			if(sl.Val(VendorId.iId,EHex)!=KErrNone)
       
   201 				return KErrArgument;
       
   202 			VendorIdSet = ETrue;
       
   203 			}
       
   204 		else
       
   205 			break;
       
   206 		}
       
   207 				
       
   208 	// Get target path
       
   209 	TPtrC s(SourceName.NameAndExt());
       
   210 	TBuf<sizeof(KDefaultDestinationPath)> defaultDestinationPath(KDefaultDestinationPath);
       
   211 	defaultDestinationPath[0] = (TUint8) RFs::GetSystemDriveChar();
       
   212 	
       
   213 	if(DestinationName.SetNoWild(nextToken,&s,&defaultDestinationPath)!=KErrNone)
       
   214 		return KErrArgument;
       
   215 
       
   216 	// Check we used all the arguments
       
   217 	if (l.NextToken() != KNullDesC)
       
   218 		return KErrArgument;
       
   219 
       
   220 	return KErrNone;
       
   221 	}
       
   222 
       
   223 
       
   224 TInt E32Main()
       
   225 	{
       
   226 	TInt r;
       
   227 
       
   228 	 // Turn off lazy dll unloading
       
   229 	RLoader l;
       
   230 	if ((r=l.Connect())!=KErrNone)
       
   231 		return r;
       
   232 	r = l.CancelLazyDllUnload();
       
   233 	l.Close();
       
   234 	if (r!=KErrNone)
       
   235 		return r;
       
   236 	
       
   237 	r = ParseCommandLine();
       
   238 	if(r!=KErrNone)
       
   239 		return r;
       
   240 	r = Fs.Connect();
       
   241 	if(r!=KErrNone)
       
   242 		return r;
       
   243 	r = Fs.MkDirAll(DestinationName.FullName());
       
   244 	if(r==KErrNone || r==KErrAlreadyExists)
       
   245 		r = DoIt();
       
   246 	Fs.Close();
       
   247 	return r;
       
   248 	}