// enumerate all processes
bool enumerate_processes(enumerate_processes_callback *callback, int flags) {
struct dirent *subdir;
DIR *dir;
char *path;
pid_t pid, ppid;
// enumerate through /proc
dir = opendir("/proc");
if (dir != NULL) {
// first, get a list of all pids
while ((subdir = readdir(dir)) != NULL) {
if (subdir->d_type == DT_DIR) {
pid = string_to_pid(subdir->d_name);
if (pid != 0) {
ppid = get_parent_pid(pid);
pid_list_add(pid, ppid);
}
}
}
// create pid tree
pid_list_create_tree();
pid_tree_do(pid_tree, callback, 0, flags);
pid_list_destroy();
closedir(dir);
return true;
} else {
perror("opendir");
}
}
pt_info_t * pt_investigate_kevent (process_tracker_t * pt, struct kevent * ke)
{
pt_info_t * result;
pt_info_t info;
if (ke->filter != EVFILT_PROC)
goto no_result;
if (ke->fflags & NOTE_CHILD)
{
printf ("new pid %d has %d as parent\n", ke->ident, ke->data);
info.event = PT_CHILD;
info.pid = ke->ident;
info.ppid = ke->data;
pid_list_add (pt->pids, pid_new_p (ke->ident));
goto result;
}
if (ke->fflags & NOTE_EXIT)
{
pid_list_iterator it;
printf ("pid %d exited\n", ke->ident);
info.event = PT_EXIT;
info.pid = ke->ident;
info.ppid = 0;
info.flags = ke->data;
for (it = pid_list_begin (pt->pids); it != NULL;
pid_list_iterator_next (&it))
{
if (*it->val == ke->ident)
goto found;
}
goto result;
found:
free (it->val);
pid_list_del (pt->pids, it->val);
goto result;
}
no_result:
return 0;
result:
result = malloc (sizeof (pt_info_t));
*result = info;
return result;
}
int pt_watch_pid (process_tracker_t * pt, pid_t pid)
{
int i;
struct kevent ke;
EV_SET (&ke, pid, EVFILT_PROC, EV_ADD, NOTE_EXIT | NOTE_TRACK, 0, NULL);
i = kevent (pt->kq, &ke, 1, NULL, 0, NULL);
if (i == -1)
fprintf (stderr, "Error: failed to watch PID %d: %s\n", pid,
strerror (errno));
else
pid_list_add (pt->pids, pid_new_p (pid));
return i == -1 ? 1 : 0;
}
int pt_watch_pid (process_tracker_t * pt, pid_t pid)
{
pid_list_add (pt->pids, pid_new_p (pid));
return 0;
}
void unit_register_pid (unit_t * unit, pid_t pid)
{
pid_t * rpid = s16mem_alloc (sizeof (pid_t));
*rpid = pid;
pid_list_add (unit->pids, rpid);
}