bool ChildData::restoreEnvironment()
{
TCHAR buf[1024];
for (int i=0; i<environmentLength; i++)
{
ts_strcpy(buf, environment[i].name);
ts_strcat(buf, "=");
ts_strcat(buf, environment[i].value);
//JMW _tputenv(buf);
}
return true;
}
int stat(const char* filename, struct stat* st)
{
if (filename == NULL || st == NULL)
{
errno = EINVAL;
return -1;
}
TCHAR filenameT[1000];
ts_strcpy(filenameT, filename);
WIN32_FILE_ATTRIBUTE_DATA fad;
if (!GetFileAttributesEx(filenameT, GetFileExInfoStandard, (LPVOID)&fad))
{
errno = ENOENT;
return -1;
}
st->st_dev = 0;
st->st_ino = 0;
st->st_mode = 0;
if (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
st->st_mode |= _S_IFDIR;
st->st_mode |= _S_IEXEC; // search permission
}
else
{
st->st_mode |= _S_IFREG;
if (strlen(filename) >= 4 && _stricmp(filename+strlen(filename)-4, ".exe") == 0)
st->st_mode |= _S_IEXEC; // execute permission
}
st->st_mode |= _S_IREAD; // TODO: assuming readable, but this may not be the case
if (!(fad.dwFileAttributes & FILE_ATTRIBUTE_READONLY))
st->st_mode |= _S_IWRITE;
st->st_nlink = 1; // TODO: NTFS can have links, so get the correct value
st->st_uid = 0;
st->st_gid = 0;
st->st_rdev = 0;
st->st_size = fad.nFileSizeLow;
/* JMW don't need this? TODO
st->st_atime = w32_filetime_to_time_t(&fad.ftLastAccessTime);
st->st_mtime = w32_filetime_to_time_t(&fad.ftLastWriteTime);
st->st_ctime = w32_filetime_to_time_t(&fad.ftCreationTime);
*/
return 0;
}
bool ChildData::addEnvironmentVar(WCHAR* env)
{
bool result = false;
WCHAR* equals;
int nameLen;
TCHAR* name = NULL;
TCHAR* value = NULL;
equals = wcschr(env, L'=');
if (equals == NULL)
goto cleanup;
nameLen = equals - env;
if (nameLen == 0)
goto cleanup;
name = (TCHAR*)malloc((nameLen+1)*sizeof(TCHAR));
if (name == NULL)
goto cleanup;
ts_strncpy(name, env, nameLen);
name[nameLen] = '\0';
value = (TCHAR*)malloc((ts_strlen(equals+1)+1)*sizeof(TCHAR));
if (value == NULL)
goto cleanup;
ts_strcpy(value, equals+1);
environment = (NameValuePair*)realloc(environment, (environmentLength+1)*sizeof(NameValuePair));
if (environment == NULL)
goto cleanup;
environment[environmentLength].name = name;
environment[environmentLength].value = value;
environmentLength++;
result = true;
cleanup:
if (result == false)
{
if (name != NULL)
free(name);
if (value != NULL)
free(value);
}
return result;
}
// if childData is NULL, the size will be returned in childDataLen
bool ChildData::encode(void* childData, int* childDataSize)
{
int currentDirectorySize = (currentDirectory == NULL) ? sizeof(WCHAR) : ts_strsizez(currentDirectory);
int redirSize = 0;
for (int i=0; i<numRedirArgs; i++)
{
redirSize += sizeof(DWORD) + sizeof(DWORD) + sizeof(DWORD);
if (redirArgs[i].redirType == RT_PIPE_UNSPEC ||
redirArgs[i].redirType == RT_PIPE_STDIN ||
redirArgs[i].redirType == RT_PIPE_STDOUT ||
redirArgs[i].redirType == RT_PIPE_STDERR ||
redirArgs[i].redirType == RT_FILE)
{
if (redirArgs[i].filename != NULL)
redirSize += ts_strsizez(redirArgs[i].filename);
}
}
DWORD envSize = 0;
if (environment != NULL)
{
for (int i=0; i<environmentLength; i++)
envSize += (_tcslen(environment[i].name) + 1 + _tcslen(environment[i].value) + 1) * sizeof(WCHAR);
envSize += sizeof(WCHAR); // list termination
}
int totalSize = 0;
totalSize += sizeof(DWORD); // length
totalSize += sizeof(DWORD); // reserved
totalSize += currentDirectorySize; // current directory
totalSize += sizeof(DWORD); // number of redirs
totalSize += redirSize; // redirs
totalSize += sizeof(DWORD); // environment length
totalSize += envSize; // environment variable list
if (childDataSize != NULL)
*childDataSize = totalSize;
if (childData != NULL)
{
char* p = (char*)childData;
// total size
memcpy(p, &totalSize, sizeof(DWORD)); //*(DWORD*)p = totalSize;
p += sizeof(DWORD);
// reserved
{
DWORD reserved = 0;
memcpy(p, &reserved, sizeof(DWORD)); //*(DWORD*)p = 0;
p += sizeof(DWORD);
}
// current directory
if (currentDirectory == NULL)
{
WCHAR zero = '\0';
*p = '\0';
memcpy(p, &zero, sizeof(WCHAR)); //*p = '\0';
p += sizeof(WCHAR);
}
else
{
ts_strcpy((WCHAR*)p, currentDirectory);
p += (ts_strlen((WCHAR*)p) + 1) * 2;
}
// num redirs
memcpy(p, &numRedirArgs, sizeof(DWORD)); //*(DWORD*)p = numRedirArgs;
p += sizeof(DWORD);
// redirs
for (int i=0; i<numRedirArgs; i++)
{
// determine if filename is present
bool filenamePresent = false;
if (redirArgs[i].redirType == RT_PIPE_UNSPEC ||
redirArgs[i].redirType == RT_PIPE_STDIN ||
redirArgs[i].redirType == RT_PIPE_STDOUT ||
redirArgs[i].redirType == RT_PIPE_STDERR ||
redirArgs[i].redirType == RT_FILE)
{
if (redirArgs[i].filename != NULL)
filenamePresent = true;
}
// flags
DWORD flags = 0;
if (redirArgs[i].redirType == RT_FILE)
flags |= 0x00000001;
else if (redirArgs[i].redirType == RT_HANDLE)
flags |= 0x00000002;
if (filenamePresent)
flags |= 0x00000004;
if (redirArgs[i].append)
flags |= 0x00000008;
if (redirArgs[i].openForRead)
flags |= 0x00000010;
if (redirArgs[i].openForWrite)
flags |= 0x00000020;
memcpy(p, &flags, sizeof(DWORD)); //*(DWORD*)p = flags;
p += sizeof(DWORD);
// fd
memcpy(p, &redirArgs[i].fd, sizeof(DWORD)); //*(DWORD*)p = redirArgs[i].fd;
p += sizeof(DWORD);
// fd2
memcpy(p, &redirArgs[i].fd2, sizeof(DWORD)); //*(DWORD*)p = redirArgs[i].fd2;
p += sizeof(DWORD);
// pipe/file name
if (filenamePresent)
{
ts_strcpy((WCHAR*)p, redirArgs[i].filename);
p += (ts_strlen((WCHAR*)p) + 1) * 2;
}
}
// environment size
memcpy(p, &envSize, sizeof(DWORD)); //*(DWORD*)p = ENVIRONMENTLENGTH * 2;
p += sizeof(DWORD);
// environment
if (envSize != 0)
{
for (int i=0; i<environmentLength; i++)
{
ts_strcpy((WCHAR*)p, environment[i].name);
p += ts_strlen((WCHAR*)p) * sizeof(WCHAR);
ts_strcpy((WCHAR*)p, L"=");
p += sizeof(WCHAR);
ts_strcpy((WCHAR*)p, environment[i].value);
p += (ts_strlen((WCHAR*)p) + 1) * sizeof(WCHAR);
}
// terminate the environment list
WCHAR zero = '\0';
memcpy(p, &zero, sizeof(WCHAR)); //*p = '\0';
p += sizeof(WCHAR);
}
}
return true;
}
// generate argc/argv from program name and lpCmdLine
// returns 0 on failure, or argc on success
int processCmdLine(LPTSTR lpCmdLine, char*** pArgv)
{
BOOL success = FALSE;
int argc = 0;
char** argv = NULL;
TCHAR programName[1024];
const int maxArgChars = 1024;
TCHAR argW[maxArgChars];
char arg[maxArgChars];
ArgType argType;
// get program name
if (GetModuleFileName(NULL, programName, 1024) <= 0)
goto cleanup;
programName[1023] = 0; // make sure it's terminated when result is truncated
// add program name to args
argc++;
argv = (char**)realloc(argv, argc*sizeof(char*));
if (argv == NULL)
goto cleanup;
argv[argc-1] = (char*)malloc((wcslen(programName)+1)*2);
if (argv[argc-1] == NULL)
goto cleanup;
unicode2ascii(programName, argv[argc-1], wcslen(programName)+1);
while ((argType = getCmdLineArg(&lpCmdLine, argW, maxArgChars, NULL, NULL)) > 0)
{
ts_strcpy(arg, argW); // convert to unicode (if we're in unicode)
if (argType == TOK_STRING)
{
HANDLE findHandle;
char* expandedArg;
if ((strchr(arg,'*')==NULL && strchr(arg,'?')==NULL) || !wildcardFindFirst(arg, &findHandle, &expandedArg))
{ // not a wildcard, or is but doesn't match anything, so just add arg to argv
argc++;
argv = (char**)realloc(argv, argc*sizeof(char*));
if (argv == NULL)
goto cleanup;
argv[argc-1] = (char*)malloc(strlen(arg)+1);
if (argv[argc-1] == NULL)
goto cleanup;
strcpy(argv[argc-1], arg);
}
else
{ // handle wildcards
int firstExpandedArgIndex = argc;
int lastExpandedArgIndex = argc;
int numPathCharsToCopyFromArg = 0;
char* lastSlash = max(strrchr(arg,'\\'), strrchr(arg,'/'));
if (lastSlash != NULL)
numPathCharsToCopyFromArg = lastSlash - arg + 1;
do
{
argc++;
argv = (char**)realloc(argv, argc*sizeof(char*));
if (argv == NULL)
{
free(expandedArg);
goto cleanup;
}
if (numPathCharsToCopyFromArg == 0)
argv[argc-1] = expandedArg;
else
{
argv[argc-1] = (char*)malloc(numPathCharsToCopyFromArg + strlen(expandedArg) + 1);
if (argv[argc-1] == NULL)
goto cleanup;
strncpy(argv[argc-1], arg, numPathCharsToCopyFromArg);
strcpy(argv[argc-1]+numPathCharsToCopyFromArg, expandedArg);
}
lastExpandedArgIndex = argc-1;
} while (wildcardFindNext(findHandle, &expandedArg));
qsort(&argv[firstExpandedArgIndex], lastExpandedArgIndex-firstExpandedArgIndex+1, sizeof(char*), qsort_stricmp);
}
}
}
// success
success = TRUE;
cleanup:
if (!success)
{
if (argv != NULL)
{
int i;
for (i=0; i<argc; i++)
free(argv[i]);
free(argv);
}
argc = 0;
}
else
*pArgv = argv;
return argc;
}
