static xbps_dictionary_t
repo_get_dict(struct xbps_repo *repo)
{
struct archive_entry *entry;
int rv;
if (repo->ar == NULL)
return NULL;
rv = archive_read_next_header(repo->ar, &entry);
if (rv != ARCHIVE_OK) {
xbps_dbg_printf(repo->xhp,
"%s: read_next_header %s\n", repo->uri,
archive_error_string(repo->ar));
return NULL;
}
return xbps_archive_get_dictionary(repo->ar, entry);
}
static int
unpack_archive(struct xbps_handle *xhp,
xbps_dictionary_t pkg_repod,
const char *pkgver,
const char *fname,
struct archive *ar)
{
xbps_dictionary_t propsd, filesd, old_filesd;
xbps_array_t array, obsoletes;
xbps_object_t obj;
void *instbuf = NULL, *rembuf = NULL;
struct stat st;
struct xbps_unpack_cb_data xucd;
struct archive_entry *entry;
size_t i, entry_idx = 0, instbufsiz = 0, rembufsiz = 0;
ssize_t entry_size;
const char *file, *entry_pname, *transact, *tgtlnk;
char *pkgname, *dname, *buf, *buf2, *p, *p2;
int ar_rv, rv, entry_type, flags;
bool preserve, update, conf_file, file_exists, skip_obsoletes;
bool softreplace, skip_extract, force, metafile;
uid_t euid;
assert(xbps_object_type(pkg_repod) == XBPS_TYPE_DICTIONARY);
assert(ar != NULL);
propsd = filesd = old_filesd = NULL;
force = preserve = update = conf_file = file_exists = false;
skip_obsoletes = softreplace = metafile = false;
xbps_dictionary_get_bool(pkg_repod, "preserve", &preserve);
xbps_dictionary_get_bool(pkg_repod, "skip-obsoletes", &skip_obsoletes);
xbps_dictionary_get_bool(pkg_repod, "softreplace", &softreplace);
xbps_dictionary_get_cstring_nocopy(pkg_repod,
"transaction", &transact);
euid = geteuid();
pkgname = xbps_pkg_name(pkgver);
assert(pkgname);
if (xhp->flags & XBPS_FLAG_FORCE_UNPACK)
force = true;
if (xhp->unpack_cb != NULL) {
/* initialize data for unpack cb */
memset(&xucd, 0, sizeof(xucd));
}
if (access(xhp->rootdir, R_OK) == -1) {
if (errno != ENOENT) {
rv = errno;
goto out;
}
if (xbps_mkpath(xhp->rootdir, 0750) == -1) {
rv = errno;
goto out;
}
}
if (chdir(xhp->rootdir) == -1) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
errno, pkgver,
"%s: [unpack] failed to chdir to rootdir `%s': %s",
pkgver, xhp->rootdir, strerror(errno));
rv = errno;
goto out;
}
if (strcmp(transact, "update") == 0)
update = true;
/*
* Process the archive files.
*/
flags = set_extract_flags(euid);
for (;;) {
ar_rv = archive_read_next_header(ar, &entry);
if (ar_rv == ARCHIVE_EOF || ar_rv == ARCHIVE_FATAL)
break;
else if (ar_rv == ARCHIVE_RETRY)
continue;
entry_pname = archive_entry_pathname(entry);
entry_size = archive_entry_size(entry);
entry_type = archive_entry_filetype(entry);
/*
* Ignore directories from archive.
*/
if (entry_type == AE_IFDIR) {
archive_read_data_skip(ar);
continue;
}
if (strcmp("./INSTALL", entry_pname) == 0) {
/*
* Store file in a buffer and execute
* the "pre" action from it.
*/
instbufsiz = entry_size;
instbuf = malloc(entry_size);
assert(instbuf);
if (archive_read_data(ar, instbuf, entry_size) !=
entry_size) {
rv = EINVAL;
goto out;
}
rv = xbps_pkg_exec_buffer(xhp, instbuf, instbufsiz,
pkgver, "pre", update);
if (rv != 0) {
xbps_set_cb_state(xhp,
XBPS_STATE_UNPACK_FAIL,
rv, pkgver,
"%s: [unpack] INSTALL script failed "
"to execute pre ACTION: %s",
pkgver, strerror(rv));
goto out;
}
continue;
} else if (strcmp("./REMOVE", entry_pname) == 0) {
/* store file in a buffer */
rembufsiz = entry_size;
rembuf = malloc(entry_size);
assert(rembuf);
if (archive_read_data(ar, rembuf, entry_size) !=
entry_size) {
rv = EINVAL;
goto out;
}
continue;
} else if (strcmp("./files.plist", entry_pname) == 0) {
filesd = xbps_archive_get_dictionary(ar, entry);
if (filesd == NULL) {
rv = errno;
goto out;
}
continue;
} else if (strcmp("./props.plist", entry_pname) == 0) {
propsd = xbps_archive_get_dictionary(ar, entry);
if (propsd == NULL) {
rv = errno;
goto out;
}
continue;
}
/*
* XXX: duplicate code.
* Create the metaplist file before unpacking any real file.
*/
if (propsd && filesd && !metafile) {
rv = create_pkg_metaplist(xhp, pkgname, pkgver,
propsd, filesd, instbuf, instbufsiz,
rembuf, rembufsiz);
if (rv != 0) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgver,
"%s: [unpack] failed to create metaplist file: %s",
pkgver, strerror(rv));
goto out;
}
metafile = true;
}
/*
* If XBPS_PKGFILES or XBPS_PKGPROPS weren't found
* in the archive at this phase, skip all data.
*/
if (propsd == NULL || filesd == NULL) {
archive_read_data_skip(ar);
/*
* If we have processed 4 entries and the two
* required metadata files weren't found, bail out.
* This is not an XBPS binary package.
*/
if (entry_idx >= 3) {
xbps_set_cb_state(xhp,
XBPS_STATE_UNPACK_FAIL, ENODEV, pkgver,
"%s: [unpack] invalid binary package `%s'.",
pkgver, fname);
rv = ENODEV;
goto out;
}
entry_idx++;
continue;
}
/*
* Prepare unpack callback ops.
*/
if (xhp->unpack_cb != NULL) {
xucd.xhp = xhp;
xucd.pkgver = pkgver;
xucd.entry = entry_pname;
xucd.entry_size = entry_size;
xucd.entry_is_conf = false;
}
/*
* Compute total entries in progress data, if set.
* total_entries = files + conf_files + links.
*/
if (xhp->unpack_cb != NULL) {
xucd.entry_total_count = 0;
array = xbps_dictionary_get(filesd, "files");
xucd.entry_total_count +=
(ssize_t)xbps_array_count(array);
array = xbps_dictionary_get(filesd, "conf_files");
xucd.entry_total_count +=
(ssize_t)xbps_array_count(array);
array = xbps_dictionary_get(filesd, "links");
xucd.entry_total_count +=
(ssize_t)xbps_array_count(array);
}
/*
* Always check that extracted file exists and hash
* doesn't match, in that case overwrite the file.
* Otherwise skip extracting it.
*/
conf_file = skip_extract = file_exists = false;
if (lstat(entry_pname, &st) == 0)
file_exists = true;
if (!force && (entry_type == AE_IFREG)) {
buf = strchr(entry_pname, '.') + 1;
assert(buf != NULL);
if (file_exists) {
/*
* Handle configuration files. Check if current
* entry is a configuration file and take action
* if required. Skip packages that don't have
* "conf_files" array on its XBPS_PKGPROPS
* dictionary.
*/
if (xbps_entry_is_a_conf_file(propsd, buf)) {
conf_file = true;
if (xhp->unpack_cb != NULL)
xucd.entry_is_conf = true;
rv = xbps_entry_install_conf_file(xhp,
filesd, entry, entry_pname, pkgver,
pkgname);
if (rv == -1) {
/* error */
goto out;
} else if (rv == 0) {
/*
* Keep curfile as is.
*/
skip_extract = true;
}
} else {
rv = xbps_file_hash_check_dictionary(
xhp, filesd, "files", buf);
if (rv == -1) {
/* error */
xbps_dbg_printf(xhp,
"%s: failed to check"
" hash for `%s': %s\n",
pkgver, entry_pname,
strerror(errno));
goto out;
} else if (rv == 0) {
/*
* hash match, skip extraction.
*/
xbps_dbg_printf(xhp,
"%s: file %s "
"matches existing SHA256, "
"skipping...\n",
pkgver, entry_pname);
skip_extract = true;
}
}
}
} else if (!force && (entry_type == AE_IFLNK)) {
/*
* Check if current link from binpkg hasn't been
* modified, otherwise extract new link.
*/
buf = realpath(entry_pname, NULL);
if (buf) {
if (strcmp(xhp->rootdir, "/")) {
p = buf;
p += strlen(xhp->rootdir);
} else
p = buf;
tgtlnk = find_pkg_symlink_target(filesd,
entry_pname);
assert(tgtlnk);
if (strncmp(tgtlnk, "./", 2) == 0) {
buf2 = strdup(entry_pname);
assert(buf2);
dname = dirname(buf2);
p2 = xbps_xasprintf("%s/%s", dname, tgtlnk);
free(buf2);
} else {
p2 = strdup(tgtlnk);
assert(p2);
}
xbps_dbg_printf(xhp, "%s: symlink %s cur: %s "
"new: %s\n", pkgver, entry_pname, p, p2);
if (strcmp(p, p2) == 0) {
xbps_dbg_printf(xhp, "%s: symlink "
"%s matched, skipping...\n",
pkgver, entry_pname);
skip_extract = true;
}
free(buf);
free(p2);
}
}
/*
* Check if current file mode differs from file mode
* in binpkg and apply perms if true.
*/
if (!force && file_exists && skip_extract &&
(archive_entry_mode(entry) != st.st_mode)) {
if (chmod(entry_pname,
archive_entry_mode(entry)) != 0) {
xbps_dbg_printf(xhp,
"%s: failed "
"to set perms %s to %s: %s\n",
pkgver, archive_entry_strmode(entry),
entry_pname,
strerror(errno));
rv = EINVAL;
goto out;
}
xbps_dbg_printf(xhp, "%s: entry %s changed file "
"mode to %s.\n", pkgver, entry_pname,
archive_entry_strmode(entry));
}
/*
* Check if current uid/gid differs from file in binpkg,
* and change permissions if true.
*/
if ((!force && file_exists && skip_extract && (euid == 0)) &&
(((archive_entry_uid(entry) != st.st_uid)) ||
((archive_entry_gid(entry) != st.st_gid)))) {
if (lchown(entry_pname,
archive_entry_uid(entry),
archive_entry_gid(entry)) != 0) {
xbps_dbg_printf(xhp,
"%s: failed "
"to set uid/gid to %u:%u (%s)\n",
pkgver, archive_entry_uid(entry),
archive_entry_gid(entry),
strerror(errno));
} else {
xbps_dbg_printf(xhp, "%s: entry %s changed "
"uid/gid to %u:%u.\n", pkgver, entry_pname,
archive_entry_uid(entry),
archive_entry_gid(entry));
}
}
if (!update && conf_file && file_exists && !skip_extract) {
/*
* If installing new package preserve old configuration
* file but renaming it to <file>.old.
*/
buf = xbps_xasprintf("%s.old", entry_pname);
(void)rename(entry_pname, buf);
free(buf);
buf = NULL;
xbps_set_cb_state(xhp,
XBPS_STATE_CONFIG_FILE, 0, pkgver,
"Renamed old configuration file "
"`%s' to `%s.old'.", entry_pname, entry_pname);
}
if (!force && skip_extract) {
archive_read_data_skip(ar);
continue;
}
/*
* Reset entry_pname again because if entry's pathname
* has been changed it will become a dangling pointer.
*/
entry_pname = archive_entry_pathname(entry);
/*
* Extract entry from archive.
*/
if (archive_read_extract(ar, entry, flags) != 0) {
rv = archive_errno(ar);
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgver,
"%s: [unpack] failed to extract file `%s': %s",
pkgver, entry_pname, strerror(rv));
} else {
if (xhp->unpack_cb != NULL) {
xucd.entry_extract_count++;
(*xhp->unpack_cb)(&xucd, xhp->unpack_cb_data);
}
}
}
/*
* XXX: duplicate code.
* Create the metaplist file if it wasn't created before.
*/
if (propsd && filesd && !metafile) {
rv = create_pkg_metaplist(xhp, pkgname, pkgver,
propsd, filesd, instbuf, instbufsiz,
rembuf, rembufsiz);
if (rv != 0) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgver,
"%s: [unpack] failed to create metaplist file: %s",
pkgver, strerror(rv));
goto out;
}
}
/*
* If there was any error extracting files from archive, error out.
*/
if ((rv = archive_errno(ar)) != 0) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgver, NULL,
"%s: [unpack] failed to extract files: %s",
pkgver, fname, archive_error_string(ar));
goto out;
}
/*
* Skip checking for obsolete files on:
* - New package installation without "softreplace" keyword.
* - Package with "preserve" keyword.
* - Package with "skip-obsoletes" keyword.
*/
if (skip_obsoletes || preserve || (!softreplace && !update))
goto out;
/*
* Check and remove obsolete files on:
* - Package upgrade.
* - Package with "softreplace" keyword.
*/
old_filesd = xbps_pkgdb_get_pkg_metadata(xhp, pkgname);
if (old_filesd == NULL)
goto out;
obsoletes = xbps_find_pkg_obsoletes(xhp, old_filesd, filesd);
for (i = 0; i < xbps_array_count(obsoletes); i++) {
obj = xbps_array_get(obsoletes, i);
file = xbps_string_cstring_nocopy(obj);
if (remove(file) == -1) {
xbps_set_cb_state(xhp,
XBPS_STATE_REMOVE_FILE_OBSOLETE_FAIL,
errno, pkgver,
"%s: failed to remove obsolete entry `%s': %s",
pkgver, file, strerror(errno));
continue;
}
xbps_set_cb_state(xhp,
XBPS_STATE_REMOVE_FILE_OBSOLETE,
0, pkgver, "%s: removed obsolete entry: %s", pkgver, file);
xbps_object_release(obj);
}
xbps_object_release(old_filesd);
out:
if (xbps_object_type(filesd) == XBPS_TYPE_DICTIONARY)
xbps_object_release(filesd);
if (xbps_object_type(propsd) == XBPS_TYPE_DICTIONARY)
xbps_object_release(propsd);
if (pkgname != NULL)
free(pkgname);
if (instbuf != NULL)
free(instbuf);
if (rembuf != NULL)
free(rembuf);
return rv;
}