static uint32
SimpleRandomNumber(const char *machineID, // IN:
const char *executionID) // IN:
{
static Atomic_Ptr atomic; /* Implicitly initialized to NULL. --mbellon */
char *context;
context = Atomic_ReadPtr(&atomic);
if (context == NULL) {
void *p;
uint32 value = 0;
/*
* Use the machineID and executionID to hopefully start each machine
* and process/thread at a different place in the answer stream.
*/
while (*machineID) {
value += *machineID++;
}
while (*executionID) {
value += *executionID++;
}
p = Random_QuickSeed(value);
if (Atomic_ReadIfEqualWritePtr(&atomic, NULL, p)) {
free(p);
}
context = Atomic_ReadPtr(&atomic);
ASSERT(context);
}
return (Random_Quick(context) >> 8) & 0xFFFF;
}
char *
DnD_CreateStagingDirectory(void)
{
const char *root;
char **stagingDirList;
int numStagingDirs;
int i;
char *ret = NULL;
Bool found = FALSE;
/*
* Make sure the root staging directory is created with the correct
* permissions.
*/
root = DnDCreateRootStagingDirectory();
if (!root) {
return NULL;
}
/* Look for an existing, empty staging directory */
numStagingDirs = File_ListDirectory(root, &stagingDirList);
if (numStagingDirs < 0) {
goto exit;
}
for (i = 0; i < numStagingDirs; i++) {
if (!found) {
char *stagingDir;
stagingDir = Unicode_Append(root, stagingDirList[i]);
if (File_IsEmptyDirectory(stagingDir) &&
DnDStagingDirectoryUsable(stagingDir)) {
ret = Unicode_Append(stagingDir, DIRSEPS);
/*
* We can use this directory. Make sure to continue to loop
* so we don't leak the remaining stagindDirList[i]s.
*/
found = TRUE;
}
free(stagingDir);
}
}
Util_FreeStringList(stagingDirList, numStagingDirs);
/* Only create a directory if we didn't find one above. */
if (!found) {
rqContext *context;
context = Random_QuickSeed((unsigned)time(NULL));
for (i = 0; i < 10; i++) {
char *temp;
/* Each staging directory is given a random name. */
free(ret);
temp = Unicode_Format("%08x%c", Random_Quick(context), DIRSEPC);
VERIFY(temp);
ret = Unicode_Append(root, temp);
free(temp);
if (File_CreateDirectory(ret) &&
DnDSetPermissionsOnStagingDir(ret)) {
found = TRUE;
break;
}
}
free(context);
}
exit:
if (!found && ret != NULL) {
free(ret);
ret = NULL;
}
return ret;
}
