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/* SPDX-License-Identifier: GPL-3.0-or-later */
#include "config.h"
#include "rdsquashfs.h"
static int create_node(tree_node_t *n, data_reader_t *data, int flags)
{
tree_node_t *c;
char *name;
int fd;
if (!(flags & UNPACK_QUIET)) {
name = fstree_get_path(n);
printf("unpacking %s\n", name);
free(name);
}
switch (n->mode & S_IFMT) {
case S_IFDIR:
if (mkdir(n->name, 0755) && errno != EEXIST) {
fprintf(stderr, "mkdir %s: %s\n",
n->name, strerror(errno));
return -1;
}
if (pushd(n->name))
return -1;
for (c = n->data.dir->children; c != NULL; c = c->next) {
if (create_node(c, data, flags))
return -1;
}
if (popd())
return -1;
break;
case S_IFLNK:
if (symlink(n->data.slink_target, n->name)) {
fprintf(stderr, "ln -s %s %s: %s\n",
n->data.slink_target, n->name,
strerror(errno));
return -1;
}
break;
case S_IFSOCK:
case S_IFIFO:
if (mknod(n->name, (n->mode & S_IFMT) | 0700, 0)) {
fprintf(stderr, "creating %s: %s\n",
n->name, strerror(errno));
return -1;
}
break;
case S_IFBLK:
case S_IFCHR:
if (mknod(n->name, n->mode & S_IFMT, n->data.devno)) {
fprintf(stderr, "creating device %s: %s\n",
n->name, strerror(errno));
return -1;
}
break;
case S_IFREG:
fd = open(n->name, O_WRONLY | O_CREAT | O_EXCL, 0600);
if (fd < 0) {
fprintf(stderr, "creating %s: %s\n",
n->name, strerror(errno));
return -1;
}
if (data_reader_dump_file(data, n->data.file, fd,
(flags & UNPACK_NO_SPARSE) == 0)) {
close(fd);
return -1;
}
close(fd);
break;
default:
break;
}
if (flags & UNPACK_CHOWN) {
if (fchownat(AT_FDCWD, n->name, n->uid, n->gid,
AT_SYMLINK_NOFOLLOW)) {
fprintf(stderr, "chown %s: %s\n",
n->name, strerror(errno));
return -1;
}
}
if (flags & UNPACK_CHMOD) {
if (fchmodat(AT_FDCWD, n->name, n->mode,
AT_SYMLINK_NOFOLLOW)) {
fprintf(stderr, "chmod %s: %s\n",
n->name, strerror(errno));
return -1;
}
}
return 0;
}
int restore_fstree(const char *rootdir, tree_node_t *root,
data_reader_t *data, int flags)
{
tree_node_t *n;
if (rootdir != NULL) {
if (mkdir_p(rootdir))
return -1;
if (pushd(rootdir))
return -1;
}
if (S_ISDIR(root->mode)) {
for (n = root->data.dir->children; n != NULL; n = n->next) {
if (create_node(n, data, flags))
return -1;
}
} else {
if (create_node(root, data, flags))
return -1;
}
return rootdir == NULL ? 0 : popd();
}
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