/*
* Get the next item in the tree traversal.
*/
int
tree_next(struct tree *t)
{
struct dirent *de = NULL;
/* Handle the startup case by returning the initial entry. */
if (t->flags & needsReturn) {
t->flags &= ~needsReturn;
return (1);
}
while (t->stack != NULL) {
/* If there's an open dir, get the next entry from there. */
while (t->d != NULL) {
de = readdir(t->d);
if (de == NULL) {
closedir(t->d);
t->d = NULL;
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '\0') {
/* Skip '.' */
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '.'
&& de->d_name[2] == '\0') {
/* Skip '..' */
} else {
/*
* Append the path to the current path
* and return it.
*/
tree_append(t, de->d_name, D_NAMELEN(de));
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
return (1);
}
}
/* If the current dir needs to be traversed, set it up. */
if (t->stack->flags & needsTraversal) {
tree_append(t, t->stack->name, strlen(t->stack->name));
t->stack->flags &= ~needsTraversal;
/* If it is a link, set up fd for the ascent. */
if (t->stack->flags & isDirLink) {
t->stack->fd = open(".", O_RDONLY);
t->openCount++;
if (t->openCount > t->maxOpenCount)
t->maxOpenCount = t->openCount;
}
if (chdir(t->stack->name) == 0) {
t->depth++;
t->dirname_length = t->path_length;
t->d = opendir(".");
} else
tree_pop(t);
continue;
}
/* We've done everything necessary for the top stack entry. */
tree_ascend(t);
tree_pop(t);
}
return (0);
}
/*
* Get the next item in the tree traversal.
*/
int
tree_next(struct tree *t)
{
struct dirent *de = NULL;
int r;
/* If we're called again after a fatal error, that's an API
* violation. Just crash now. */
if (t->visit_type == TREE_ERROR_FATAL) {
const char *msg = "Unable to continue traversing"
" directory hierarchy after a fatal error.\n";
errmsg(msg);
*(volatile int *)0 = 1; /* Deliberate SEGV; NULL pointer dereference. */
exit(1); /* In case the SEGV didn't work. */
}
/* Handle the startup case by returning the initial entry. */
if (t->flags & needsReturn) {
t->flags &= ~needsReturn;
return (t->visit_type = TREE_REGULAR);
}
while (t->stack != NULL) {
/* If there's an open dir, get the next entry from there. */
while (t->d != NULL) {
errno = 0;
de = readdir(t->d);
if (de == NULL) {
if (errno) {
/* If readdir fails, we're screwed. */
closedir(t->d);
t->d = NULL;
t->visit_type = TREE_ERROR_FATAL;
return (t->visit_type);
}
/* Reached end of directory. */
closedir(t->d);
t->d = NULL;
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '\0') {
/* Skip '.' */
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '.'
&& de->d_name[2] == '\0') {
/* Skip '..' */
} else {
/*
* Append the path to the current path
* and return it.
*/
tree_append(t, de->d_name, D_NAMELEN(de));
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
return (t->visit_type = TREE_REGULAR);
}
}
/* If the current dir needs to be visited, set it up. */
if (t->stack->flags & needsPreVisit) {
t->current = t->stack;
tree_append(t, t->stack->name, strlen(t->stack->name));
t->stack->flags &= ~needsPreVisit;
/* If it is a link, set up fd for the ascent. */
if (t->stack->flags & isDirLink) {
#ifdef HAVE_FCHDIR
t->stack->fd = open(".", O_RDONLY);
#elif defined(_WIN32) && !defined(__CYGWIN__)
t->stack->fullpath = getcwd(NULL, 0);
#endif
t->openCount++;
if (t->openCount > t->maxOpenCount)
t->maxOpenCount = t->openCount;
}
t->dirname_length = t->path_length;
if (chdir(t->stack->name) != 0) {
/* chdir() failed; return error */
tree_pop(t);
t->tree_errno = errno;
return (t->visit_type = TREE_ERROR_DIR);
}
t->depth++;
t->d = opendir(".");
if (t->d == NULL) {
r = tree_ascend(t); /* Undo "chdir" */
tree_pop(t);
t->tree_errno = errno;
t->visit_type = r != 0 ? r : TREE_ERROR_DIR;
return (t->visit_type);
}
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
t->basename = ".";
/* Figure out where we are. */
if (getcwd(t->realpath, PATH_MAX) != NULL) {
t->realpath_dirname_length =
strlen(t->realpath);
if (t->realpath[0] == '/' &&
t->realpath[1] == '\0')
t->realpath_dirname_length = 0;
t->realpath_valid = 1;
} else {
t->realpath_valid = 0;
}
return (t->visit_type = TREE_POSTDESCENT);
}
/* We've done everything necessary for the top stack entry. */
if (t->stack->flags & needsPostVisit) {
r = tree_ascend(t);
tree_pop(t);
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
t->visit_type = r != 0 ? r : TREE_POSTASCENT;
return (t->visit_type);
}
}
return (t->visit_type = 0);
}
/*
* Get the next item in the tree traversal.
*/
int
tree_next(struct tree *t)
{
struct dirent *de = NULL;
/* Handle the startup case by returning the initial entry. */
if (t->flags & needsReturn) {
t->flags &= ~needsReturn;
return (t->visit_type = TREE_REGULAR);
}
while (t->stack != NULL) {
/* If there's an open dir, get the next entry from there. */
while (t->d != NULL) {
de = readdir(t->d);
if (de == NULL) {
closedir(t->d);
t->d = NULL;
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '\0') {
/* Skip '.' */
} else if (de->d_name[0] == '.'
&& de->d_name[1] == '.'
&& de->d_name[2] == '\0') {
/* Skip '..' */
} else {
/*
* Append the path to the current path
* and return it.
*/
tree_append(t, de->d_name, D_NAMELEN(de));
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
return (t->visit_type = TREE_REGULAR);
}
}
/* If the current dir needs to be visited, set it up. */
if (t->stack->flags & needsPreVisit) {
t->current = t->stack;
tree_append(t, t->stack->name, strlen(t->stack->name));
t->stack->flags &= ~needsPreVisit;
/* If it is a link, set up fd for the ascent. */
if (t->stack->flags & isDirLink) {
t->stack->fd = open(".", O_RDONLY);
t->openCount++;
if (t->openCount > t->maxOpenCount)
t->maxOpenCount = t->openCount;
}
t->dirname_length = t->path_length;
if (chdir(t->stack->name) != 0) {
/* chdir() failed; return error */
tree_pop(t);
t->tree_errno = errno;
return (t->visit_type = TREE_ERROR_DIR);
}
t->depth++;
t->d = opendir(".");
if (t->d == NULL) {
tree_ascend(t); /* Undo "chdir" */
tree_pop(t);
t->tree_errno = errno;
return (t->visit_type = TREE_ERROR_DIR);
}
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
t->basename = ".";
return (t->visit_type = TREE_POSTDESCENT);
}
/* We've done everything necessary for the top stack entry. */
if (t->stack->flags & needsPostVisit) {
tree_ascend(t);
tree_pop(t);
t->flags &= ~hasLstat;
t->flags &= ~hasStat;
return (t->visit_type = TREE_POSTASCENT);
}
}
return (t->visit_type = 0);
}