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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* get_by_path.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#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.children;
while (n != NULL) {
if (strncmp(n->name, name, len) == 0 && n->name[len] == '\0')
break;
n = n->next;
}
return n;
}
tree_node_t *fstree_get_node_by_path(fstree_t *fs, tree_node_t *root,
const char *path, bool create_implicitly,
bool stop_at_parent)
{
const char *end;
tree_node_t *n;
size_t len;
while (*path != '\0') {
while (*path == '/')
++path;
if (!S_ISDIR(root->mode)) {
errno = ENOTDIR;
return NULL;
}
end = strchr(path, '/');
if (end == NULL) {
if (stop_at_parent)
break;
len = strlen(path);
} else {
len = end - path;
}
n = child_by_name(root, path, len);
if (n == NULL) {
struct stat sb;
if (!create_implicitly) {
errno = ENOENT;
return NULL;
}
memset(&sb, 0, sizeof(sb));
sb.st_mode = S_IFDIR | (fs->defaults.mode & 07777);
sb.st_uid = fs->defaults.uid;
sb.st_gid = fs->defaults.gid;
sb.st_mtime = fs->defaults.mtime;
n = fstree_mknode(root, path, len, NULL, &sb);
if (n == NULL)
return NULL;
n->flags |= FLAG_DIR_CREATED_IMPLICITLY;
}
root = n;
path = path + len;
}
return root;
}
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