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/* SPDX-License-Identifier: GPL-3.0-or-later */
/*
* fstree_from_dir.c
*
* Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
*/
#include "config.h"
#include "mkfs.h"
#include <dirent.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
static sqfs_u32 clamp_timestamp(sqfs_s64 ts)
{
if (ts < 0)
return 0;
if (ts > 0x0FFFFFFFFLL)
return 0xFFFFFFFF;
return ts;
}
static void discard_node(tree_node_t *root, tree_node_t *n)
{
tree_node_t *it;
if (n == root->data.children) {
root->data.children = n->next;
} else {
it = root->data.children;
while (it != NULL && it->next != n)
it = it->next;
if (it != NULL)
it->next = n->next;
}
free(n);
}
static int scan_dir(fstree_t *fs, tree_node_t *root, dir_iterator_t *dir,
scan_node_callback cb, void *user)
{
for (;;) {
dir_entry_t *ent = NULL;
tree_node_t *n = NULL;
char *extra = NULL;
struct stat sb;
int ret = dir->next(dir, &ent);
if (ret > 0)
break;
if (ret < 0) {
sqfs_perror("readdir", NULL, ret);
return -1;
}
n = fstree_get_node_by_path(fs, root, ent->name, false, true);
if (n == NULL) {
if (S_ISDIR(ent->mode))
dir_tree_iterator_skip(dir);
free(ent);
continue;
}
if (S_ISLNK(ent->mode)) {
ret = dir->read_link(dir, &extra);
if (ret) {
free(ent);
sqfs_perror("readlink", ent->name, ret);
return -1;
}
}
memset(&sb, 0, sizeof(sb));
sb.st_uid = ent->uid;
sb.st_gid = ent->gid;
sb.st_mode = ent->mode;
sb.st_mtime = clamp_timestamp(ent->mtime);
n = fstree_add_generic_at(fs, root, ent->name, &sb, extra);
free(extra);
free(ent);
if (n == NULL) {
perror("creating tree node");
return -1;
}
ret = (cb == NULL) ? 0 : cb(user, fs, n);
if (ret < 0)
return -1;
if (ret > 0) {
if (S_ISDIR(n->mode))
dir_tree_iterator_skip(dir);
discard_node(n->parent, n);
}
}
return 0;
}
int fstree_from_dir(fstree_t *fs, tree_node_t *root, const char *path,
scan_node_callback cb, void *user, unsigned int flags)
{
dir_iterator_t *dir;
dir_tree_cfg_t cfg;
int ret;
memset(&cfg, 0, sizeof(cfg));
cfg.flags = flags;
cfg.def_mtime = fs->defaults.mtime;
dir = dir_tree_iterator_create(path, &cfg);
if (dir == NULL)
return -1;
ret = scan_dir(fs, root, dir, cb, user);
sqfs_drop(dir);
return ret;
}
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