/*
* Functions similarly to realloc, but does checking on the input
* pointer, and stores output pointer data in our hash table
*/
void *realloc537(void *ptr, size_t size)
{
void * return_pointer;
node * remove_node = NULL;
/* If the pointer is null, this is just a malloc! let malloc537 handle it.*/
if(ptr == NULL)
{
return malloc537(size);
}
/* If the size is null, it's just a free.*/
else if(size == 0)
{
free537(ptr);
return NULL;
}
else
{
/*HERE WE DO A REMOVE/mark as unused/whatever*/
node * temp;
temp = lookup(ptr);
temp->free = 1;
}
return_pointer = realloc(ptr, size);
/* Before we insert, remove any nodes that will be overlapped.*/
/*
* Need to find all nodes within range base+1 to size, and delete them.
*/
remove_node = contained_lookup(return_pointer, size);
while(remove_node != NULL)
{
delete_node(remove_node->base);
remove_node = contained_lookup(return_pointer, size);
}
insert(ptr, size);
/*
print(root, 0);
printf("\n");
*/
return return_pointer;
}
int *getProcesses()
{
const char* proc = "/proc";
int *pid;
int pidSize;
DIR *handle;
/*Get DIR struct for /proc*/
struct dirent processes;
/*Struct for each directory in /proc*/
struct dirent *p;
int x;
int i;
int isPID;
handle = opendir(proc);
if(!handle)
{
return NULL;
}
x = 0;
pidSize = 100;
pid = (int *) malloc537(pidSize * sizeof(int));
if(!pid)
{
free537(pid);
closedir(handle);
return NULL;
}
p = readdir(handle);
while(p)
{
processes = *p;
i = 0;
isPID = 1;
/* Make sure the directory name is an integer*/
while(processes.d_name[i] != '\0' && isPID)
{
if(!isdigit((int)(processes.d_name[i])))
{
isPID = 0;
}
i++;
}
/* If UID is correct, add it to the array*/
if(isPID && hasUID(processes.d_name))
{
memcheck537(&pid[x], sizeof(int));
pid[x] = atoi(processes.d_name);
if(pid[x] == 0)
{
free537(pid);
closedir(handle);
return NULL;
}
x++;
/*Double the size of the array if we hit the end */
if(x >= pidSize)
{
pidSize*=2;
pid = (int *) realloc537(pid, pidSize*sizeof(int));
if(!pid)
{
free537(pid);
closedir(handle);
return NULL;
}
}
}
p = readdir(handle);
}
/*if there isn't an error, return the array*/
if(errno == 0)
{
memcheck537(pid + x, sizeof(int));
*(pid + x) = 0;
closedir(handle);
return pid;
}
else
{
free537(pid);
closedir(handle);
return NULL;
}
}
