// Nits Installation reads the nitsinj.dll name from registry key on windows
// On linux, we use the file based mechanism where we require that NitsInstalled file is present
// at specific location. The windows way of doing this was required so that we are fine with layermap tool
void LoadInjectorIfRequired()
{
#ifdef _MSC_VER
#define InjectorStrLength (sizeof(L"nitsinj.dll")/sizeof(wchar_t))
HKEY key;
wchar_t value[InjectorStrLength];
DWORD valueSize = sizeof(value);
DWORD valueType = 0;
DWORD queryError = 0;
RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\WSMAN", 0, KEY_QUERY_VALUE, &key);
queryError = RegQueryValueEx(key, L"NitsInjector", NULL, &valueType, (BYTE *)&value, &valueSize);
if((queryError == 0) && (InjectorStrLength*sizeof(wchar_t) == valueSize))
{
PAL_Char injectorLibName[InjectorStrLength];
value[InjectorStrLength - 1] = L'\0';
#ifdef CONFIG_ENABLE_WCHAR
Wcslcpy(injectorLibName, value, InjectorStrLength);
#else
StrWcslcpy(injectorLibName, value, InjectorStrLength)
#endif
LoadInjector(injectorLibName);
}
RegCloseKey(key);
#else
FILE* fp = File_Open(CONFIG_TMPDIR "/NitsInstalled", "rb");
if(fp)
{
PAL_Char injectorLibName[NAME_MAX];
TcsStrlcpy(injectorLibName, CONFIG_LIBDIR "/libnitsinj.so", NAME_MAX);
LoadInjector(injectorLibName);
File_Close(fp);
}
#endif
}
PAL_Char* Shlib_Err()
{
#if defined(_MSC_VER)
PAL_Char* err = NULL;
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER|
FORMAT_MESSAGE_FROM_SYSTEM|
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
GetLastError(),
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR)&err,
0,
NULL);
return err;
#else
char* err = dlerror();
size_t len = strlen(err) + 1;
PAL_Char* copy = PAL_Malloc(len * sizeof(PAL_Char));
TcsStrlcpy(copy, err, len);
return copy;
#endif
}
MI_Result UpdateTask(
_In_z_ MI_Char* taskName,
_In_z_ MI_Char* taskTime,
_In_ MI_Uint32 refreshFrequencyInSeconds,
_Outptr_result_maybenull_ MI_Instance **extendedError)
{
int retValue = -1;
ssize_t read = 0;
size_t readLength = 0, writeLength = 0;
MI_Char *line = NULL, *lineToWrite = NULL, *taskInCrontab = NULL;
FILE *cronFile = NULL, *cronFileTmp = NULL;
MI_Uint32 errorCode = 0;
if (extendedError == NULL)
{
return MI_RESULT_INVALID_PARAMETER;
}
*extendedError = NULL;
// Preparation
if (refreshFrequencyInSeconds > THIRTY_ONE_DAYS_IN_SECONDS)
{
refreshFrequencyInSeconds = THIRTY_ONE_DAYS_IN_SECONDS;
}
if (refreshFrequencyInSeconds < FIFTEEN_MINUTES_IN_SECONDS)
{
refreshFrequencyInSeconds = FIFTEEN_MINUTES_IN_SECONDS;
}
// PLAN 1 -- process each line of crontab file to a tmp file and then copy tmp file back
// taskTime string is not used in Linux since we can simply register a task with frequency
// Allocate memory
line = (MI_Char *)DSC_malloc(UNIT_LINE_SIZE * sizeof(MI_Char), NitsHere());
if (line == NULL)
{
errorCode = ID_LCMHELPER_MEMORY_ERROR;
goto ExitWithError;
}
lineToWrite = (MI_Char *)DSC_malloc(UNIT_LINE_SIZE * sizeof(MI_Char), NitsHere());
if (lineToWrite == NULL)
{
errorCode = ID_LCMHELPER_MEMORY_ERROR;
goto ExitWithError;
}
taskInCrontab = (MI_Char *)DSC_malloc(UNIT_LINE_SIZE * sizeof(MI_Char), NitsHere());
if (taskInCrontab == NULL)
{
errorCode = ID_LCMHELPER_MEMORY_ERROR;
goto ExitWithError;
}
// Open files
if (File_ExistT(CRON_FILE) != -1)
{
cronFile = File_OpenT(CRON_FILE, MI_T("r"));
if (cronFile == NULL)
{
// Fail to open existing cron file should lead to error exit
errorCode = ID_ENGINEHELPER_OPENFILE_ERROR;
goto ExitWithError;
}
}
cronFileTmp = File_OpenT(CRON_FILE_TMP, MI_T("w"));
if (cronFileTmp == NULL)
{
// Fail to create tmp file should lead to error exit
errorCode = ID_LCMHELPER_CREATEFILE_ERROR;
goto ExitWithError;
}
// Read and process crontab file if it exists and opens appropriately
while (cronFile != NULL && (read = readline(&line, &readLength, cronFile)) != -1)
{
retValue = TcsStrlcpy(lineToWrite, line, Tcslen(line)+1);
retValue = sscanf(line, MI_T("%*s %*s %*s %*s %*s %*s %s"), taskInCrontab);
if (retValue == 0)
{
// Ignore the bad line that does not comply with crontab file format
continue;
}
else
{
if (Tcsncasecmp(taskName, taskInCrontab, Tcslen(taskName)) == 0)
{
// Ignore entry that duplicates registration of task
continue;
}
else
{
// Write the entry to tmp file
writeLength = fwrite(lineToWrite, 1, Tcslen(lineToWrite), cronFileTmp);
if (writeLength != read)
{
errorCode = ID_LCMHELPER_WRITEFILE_ERROR;
goto ExitWithError;
}
}
}
}
if (readLength == -1)
{
// Deal memory failure in readline function
errorCode = ID_ENGINEHELPER_READFILE_ERROR;
goto ExitWithError;
}
// Add the task entry
retValue = Stprintf(lineToWrite, UNIT_LINE_SIZE, MI_T("*/%d * * * * root %T\n"), refreshFrequencyInSeconds / 60, taskName);
if (retValue == -1)
{
errorCode = ID_LCMHELPER_PRINTF_ERROR;
goto ExitWithError;
}
writeLength = fwrite(lineToWrite, 1, Tcslen(lineToWrite), cronFileTmp);
if (writeLength != Tcslen(lineToWrite))
{
errorCode = ID_LCMHELPER_WRITEFILE_ERROR;
goto ExitWithError;
}
if (cronFile != NULL)
File_Close(cronFile);
File_Close(cronFileTmp);
File_CopyT(CRON_FILE_TMP, CRON_FILE);
File_RemoveT(CRON_FILE_TMP);
DSC_free(line);
DSC_free(lineToWrite);
DSC_free(taskInCrontab);
return MI_RESULT_OK;
ExitWithError:
// Close files and remove temp file if it exists
if (cronFile)
File_Close(cronFile);
if (cronFileTmp)
File_Close(cronFileTmp);
if (File_ExistT(CRON_FILE_TMP) != -1)
File_RemoveT(CRON_FILE_TMP);
// Free memory allocations
if (line != NULL)
DSC_free(line);
if (lineToWrite != NULL)
DSC_free(lineToWrite);
if (taskInCrontab != NULL)
DSC_free(taskInCrontab);
// Form rich CIM error
if (errorCode != 0)
return GetCimMIError(MI_RESULT_SERVER_LIMITS_EXCEEDED, extendedError, errorCode);
else
return MI_RESULT_FAILED;
}