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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "fstree.h"
#include <string.h>
#include <errno.h>
static tree_node_t *child_by_name(tree_node_t *root, const char *name,
size_t len)
{
tree_node_t *n = root->data.dir->children;
while (n != NULL) {
if (strncmp(n->name, name, len) == 0 && n->name[len] == '\0')
break;
n = n->next;
}
return n;
}
static tree_node_t *get_parent_node(fstree_t *fs, tree_node_t *root,
const char *path)
{
const char *end;
tree_node_t *n;
for (;;) {
if (!S_ISDIR(root->mode)) {
errno = ENOTDIR;
return NULL;
}
end = strchr(path, '/');
if (end == NULL)
break;
n = child_by_name(root, path, end - path);
if (n == NULL) {
n = fstree_mknode(fs, root, path, end - path, NULL,
&fs->defaults);
if (n == NULL)
return NULL;
n->data.dir->created_implicitly = true;
}
root = n;
path = end + 1;
}
return root;
}
tree_node_t *fstree_add_generic(fstree_t *fs, const char *path,
const struct stat *sb, const char *extra)
{
tree_node_t *child, *parent;
const char *name;
parent = get_parent_node(fs, fs->root, path);
if (parent == NULL)
return NULL;
name = strrchr(path, '/');
name = (name == NULL ? path : (name + 1));
child = child_by_name(parent, name, strlen(name));
if (child != NULL) {
if (!S_ISDIR(child->mode) || !S_ISDIR(sb->st_mode) ||
!child->data.dir->created_implicitly) {
errno = EEXIST;
return NULL;
}
child->uid = sb->st_uid;
child->gid = sb->st_gid;
child->mode = sb->st_mode;
child->data.dir->created_implicitly = false;
return child;
}
return fstree_mknode(fs, parent, name, strlen(name), extra, sb);
}
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