void watch(char *path, bool is_link)
{
// Add initial path to the watch list
LIST_NODE *node = get_from_path(path);
if (node == NULL)
node = add_to_watch_list(path);
// Searchs and increments the reference counter
// of the link in list_link
if (is_link)
add_to_link_list(node);
// Temporary list to perform breath-first-search
LIST *list = list_init();
list_push(list, (void *) path);
// Traverse directory
DIR *dir_stream;
struct dirent *dir;
while (list->first != NULL)
{
// Directory to watch
char *p = (char*) list_pop(list);
// Traverse directory
dir_stream = opendir(p);
while (dir = readdir(dir_stream))
{
if (dir->d_type == DT_DIR &&
strcmp(dir->d_name, ".") == 1 &&
strcmp(dir->d_name, "..") == 1)
{
char *path_to_watch = (char*) malloc(sizeof(char) * (strlen(p) + strlen(dir->d_name) + 2));
strcpy(path_to_watch, p);
strcat(path_to_watch, dir->d_name);
strcat(path_to_watch, "/");
// Add to the watch list
if (get_from_path(path_to_watch) == NULL)
add_to_watch_list(path_to_watch);
// Continue directory traversing
list_push(list, (void*) path_to_watch);
}
// Resolve symbolic link
else if (dir->d_type == DT_LNK)
{
char *path_to_watch = (char*) malloc(sizeof(char) * (strlen(p) + strlen(dir->d_name) + 1));
strcpy(path_to_watch, p);
strcat(path_to_watch, dir->d_name);
char *real_path = resolve_real_path(path_to_watch);
// Test for:
// 1. is a real path
// 2. is a directory
if (real_path != NULL && opendir(real_path) != NULL)
{
// Add to the watch list if it's not present
LIST_NODE *node = get_from_path(real_path);
if (node == NULL)
node = add_to_watch_list(real_path);
// Searchs and increments the reference counter
// of the link in list_link
add_to_link_list(node);
// Continue directory traversing
list_push(list, (void*) real_path);
}
}
}
closedir(dir_stream);
}
// Free memory
list_free(list);
}
void watch(char *path, bool is_link)
{
/* Add initial path to the watch list */
LIST_NODE *node = get_from_path(path);
if (node == NULL)
node = add_to_watch_list(path, is_link);
/* Temporary list to perform breath-first-search */
LIST *list = list_init();
list_push(list, (void *) path);
/* Traverse directory */
DIR *dir_stream;
struct dirent *dir;
while (list->first != NULL)
{
/* Directory to watch */
char *p = (char*) list_pop(list);
/* Traverse directory */
dir_stream = opendir(p);
while (dir = readdir(dir_stream))
{
if (dir->d_type == DT_DIR &&
strcmp(dir->d_name, ".") != 0 &&
strcmp(dir->d_name, "..") != 0)
{
char *path_to_watch = (char*) malloc(sizeof(char) * (strlen(p) + strlen(dir->d_name) + 2));
strcpy(path_to_watch, p);
strcat(path_to_watch, dir->d_name);
strcat(path_to_watch, "/");
/* Add to the watch list with is_link = 0 because is a folder */
if (get_from_path(path_to_watch) == NULL)
add_to_watch_list(path_to_watch, 0);
/**
* XXX: [it] prima di inserire path_to_watch
* in `list` sarebbe opportuto controllare che
* non sia gia' stata inserita in passato da un qualche ln
* che, risolto, puntava ad essa
* prima di inserire questo controllo bisogna assicurarsi che sia
* effettivamente necessario per evetitare spreco di risorse.
* Ad ogni modo senza, effettuerebbe cicli inutili ma non dovrebbe essere compromessa
* la stabilita'.
*/
/* Continue directory traversing */
list_push(list, (void*) path_to_watch);
}
/* Resolve symbolic link */
else if (dir->d_type == DT_LNK)
{
char *path_to_watch = (char*) malloc(sizeof(char) * (strlen(p) + strlen(dir->d_name) + 1));
strcpy(path_to_watch, p);
strcat(path_to_watch, dir->d_name);
char *real_path = resolve_real_path(path_to_watch);
/**
* Test for:
* 1. is a real path
* 2. is a directory
*/
if (real_path != NULL && opendir(real_path) != NULL)
{
/**
* If it's not present add to the watch list with is_link = 1,
* because is pointed by a symbolic link.
*/
LIST_NODE *node = get_from_path(real_path);
if (node == NULL)
node = add_to_watch_list(real_path, 1);
/**
* Otherwise path_to_watch is a symbolic_link that point
* to real_path, so add path_to_watch in links LIST in node->data
*/
WD_DATA *wd_data = (WD_DATA*) node->data;
wd_data->symbolic_link = 1;
list_push(wd_data->links, (char*) path_to_watch);
/* Continue directory traversing */
list_push(list, (void*) real_path);
}
}
}
closedir(dir_stream);
}
list_free(list);
}
