xbps/lib/package_unpack.c

670 lines
19 KiB
C

/*-
* Copyright (c) 2008-2012 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <sys/stat.h>
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <libgen.h>
#include "xbps_api_impl.h"
static int
set_extract_flags(uid_t euid)
{
int flags;
if (euid == 0)
flags = FEXTRACT_FLAGS;
else
flags = EXTRACT_FLAGS;
return flags;
}
static const char *
find_pkg_symlink_target(prop_dictionary_t d, const char *file)
{
prop_array_t links;
prop_object_t obj;
size_t i;
const char *pkgfile, *tgt = NULL;
char *rfile;
assert(d);
links = prop_dictionary_get(d, "links");
assert(links);
for (i = 0; i < prop_array_count(links); i++) {
rfile = strchr(file, '.') + 1;
obj = prop_array_get(links, i);
prop_dictionary_get_cstring_nocopy(obj, "file", &pkgfile);
if (strcmp(rfile, pkgfile) == 0) {
prop_dictionary_get_cstring_nocopy(obj, "target", &tgt);
break;
}
}
return tgt;
}
static int
unpack_archive(struct xbps_handle *xhp,
prop_dictionary_t pkg_repod,
struct archive *ar)
{
prop_dictionary_t pkg_metad = NULL, filesd = NULL, old_filesd = NULL;
prop_array_t array, obsoletes;
prop_object_t obj;
prop_data_t data;
void *instbuf = NULL, *rembuf = NULL;
const struct stat *entry_statp;
struct stat st;
struct xbps_unpack_cb_data xucd;
struct archive_entry *entry;
size_t i, entry_idx = 0;
size_t instbufsiz, rembufsiz;
ssize_t entry_size;
const char *file, *entry_pname, *transact, *pkgname;
const char *version, *pkgver, *fname, *tgtlnk;
char *dname, *buf, *buf2, *p, *p2;
int ar_rv, rv, rv_stat, flags;
bool preserve, update, conf_file, file_exists, skip_obsoletes;
bool softreplace, skip_extract, force;
uid_t euid;
assert(prop_object_type(pkg_repod) == PROP_TYPE_DICTIONARY);
assert(ar != NULL);
force = preserve = update = conf_file = file_exists = false;
skip_obsoletes = softreplace = false;
prop_dictionary_get_bool(pkg_repod, "preserve", &preserve);
prop_dictionary_get_bool(pkg_repod, "skip-obsoletes", &skip_obsoletes);
prop_dictionary_get_bool(pkg_repod, "softreplace", &softreplace);
prop_dictionary_get_cstring_nocopy(pkg_repod,
"transaction", &transact);
prop_dictionary_get_cstring_nocopy(pkg_repod, "pkgname", &pkgname);
prop_dictionary_get_cstring_nocopy(pkg_repod, "version", &version);
prop_dictionary_get_cstring_nocopy(pkg_repod, "pkgver", &pkgver);
prop_dictionary_get_cstring_nocopy(pkg_repod, "filename", &fname);
euid = geteuid();
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, pkgname, version,
"%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.
*/
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_statp = archive_entry_stat(entry);
entry_pname = archive_entry_pathname(entry);
entry_size = archive_entry_size(entry);
flags = set_extract_flags(euid);
/*
* Ignore directories from archive.
*/
if (S_ISDIR(entry_statp->st_mode)) {
archive_read_data_skip(ar);
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;
}
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;
free(instbuf);
goto out;
}
rv = xbps_pkg_exec_buffer(xhp, instbuf, instbufsiz,
pkgname, version, "pre", update);
if (rv != 0) {
xbps_set_cb_state(xhp,
XBPS_STATE_UNPACK_FAIL,
rv, pkgname, version,
"%s: [unpack] INSTALL script failed "
"to execute pre ACTION: %s",
pkgver, strerror(rv));
free(instbuf);
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;
free(rembuf);
goto out;
}
continue;
} else if (strcmp("./files.plist", entry_pname) == 0) {
/*
* Internalize this entry into a prop_dictionary
* to check for obsolete files if updating a package.
* It will be extracted to disk at the end.
*/
filesd = xbps_dictionary_from_archive_entry(ar, entry);
if (filesd == NULL) {
rv = errno;
goto out;
}
continue;
} else if (strcmp("./props.plist", entry_pname) == 0) {
/* ignore this one; we use pkg data from repo index */
archive_read_data_skip(ar);
continue;
}
/*
* If XBPS_PKGFILES or XBPS_PKGPROPS weren't found
* in the archive at this phase, skip all data.
*/
if (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, pkgname, version,
"%s: [unpack] invalid binary package `%s'.",
pkgver, fname);
rv = ENODEV;
goto out;
}
entry_idx++;
continue;
}
/*
* 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 = prop_dictionary_get(filesd, "files");
xucd.entry_total_count +=
(ssize_t)prop_array_count(array);
array = prop_dictionary_get(filesd, "conf_files");
xucd.entry_total_count +=
(ssize_t)prop_array_count(array);
array = prop_dictionary_get(filesd, "links");
xucd.entry_total_count +=
(ssize_t)prop_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;
rv_stat = lstat(entry_pname, &st);
if (rv_stat == 0)
file_exists = true;
if (!force && S_ISREG(entry_statp->st_mode)) {
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(pkg_repod, 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,
pkgname, version);
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-%s: failed to check"
" hash for `%s': %s\n",
pkgname, version,
entry_pname,
strerror(errno));
goto out;
} else if (rv == 0) {
/*
* hash match, skip extraction.
*/
xbps_dbg_printf(xhp,
"%s-%s: file %s "
"matches existing SHA256, "
"skipping...\n", pkgname,
version, entry_pname);
skip_extract = true;
}
}
}
} else if (!force && S_ISLNK(entry_statp->st_mode)) {
/*
* 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-%s: symlink "
"%s matched, skipping...\n",
pkgname, version, entry_pname);
skip_extract = true;
}
free(buf);
}
}
/*
* Check if current file mode differs from file mode
* in binpkg and apply perms if true.
*/
if (!force && file_exists && skip_extract &&
(entry_statp->st_mode != st.st_mode)) {
if (chmod(entry_pname,
entry_statp->st_mode) != 0) {
xbps_dbg_printf(xhp,
"%s-%s: failed "
"to set perms %s to %s: %s\n",
pkgname, version,
archive_entry_strmode(entry),
entry_pname,
strerror(errno));
rv = EINVAL;
goto out;
}
xbps_dbg_printf(xhp, "%s-%s: entry %s changed file "
"mode to %s.\n", pkgname, version, 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)) &&
(((entry_statp->st_uid != st.st_uid)) ||
((entry_statp->st_gid != st.st_gid)))) {
if (chown(entry_pname,
entry_statp->st_uid, entry_statp->st_gid) != 0) {
xbps_dbg_printf(xhp,
"%s-%s: failed "
"to set uid/gid to %u:%u (%s)\n",
pkgname, version,
entry_statp->st_uid, entry_statp->st_gid,
strerror(errno));
} else {
xbps_dbg_printf(xhp, "%s-%s: entry %s changed "
"uid/gid to %u:%u.\n", pkgname, version,
entry_pname,
entry_statp->st_uid, entry_statp->st_gid);
}
}
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,
pkgname, version,
"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, pkgname, version,
"%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);
}
}
}
/*
* 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, pkgname, version,
"%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 out1;
/*
* Check and remove obsolete files on:
* - Package upgrade.
* - Package with "softreplace" keyword.
*/
old_filesd = xbps_pkgdb_get_pkg_metadata(xhp, pkgname);
assert(prop_object_type(old_filesd) == PROP_TYPE_DICTIONARY);
obsoletes = xbps_find_pkg_obsoletes(xhp, old_filesd, filesd);
for (i = 0; i < prop_array_count(obsoletes); i++) {
obj = prop_array_get(obsoletes, i);
file = prop_string_cstring_nocopy(obj);
if (remove(file) == -1) {
xbps_set_cb_state(xhp,
XBPS_STATE_REMOVE_FILE_OBSOLETE_FAIL,
errno, pkgname, version,
"%s: failed to remove obsolete entry `%s': %s",
pkgver, file, strerror(errno));
continue;
}
xbps_set_cb_state(xhp,
XBPS_STATE_REMOVE_FILE_OBSOLETE,
0, pkgname, version,
"%s: removed obsolete entry: %s", pkgver, file);
prop_object_release(obj);
}
out1:
prop_dictionary_make_immutable(pkg_repod);
pkg_metad = prop_dictionary_copy_mutable(pkg_repod);
/* Add objects from XBPS_PKGFILES */
array = prop_dictionary_get(filesd, "files");
if (array && prop_array_count(array))
prop_dictionary_set(pkg_metad, "files", array);
array = prop_dictionary_get(filesd, "conf_files");
if (array && prop_array_count(array))
prop_dictionary_set(pkg_metad, "conf_files", array);
array = prop_dictionary_get(filesd, "links");
if (array && prop_array_count(array))
prop_dictionary_set(pkg_metad, "links", array);
array = prop_dictionary_get(filesd, "dirs");
if (array && prop_array_count(array))
prop_dictionary_set(pkg_metad, "dirs", array);
/* Add install/remove scripts data objects */
if (instbuf != NULL) {
data = prop_data_create_data(instbuf, instbufsiz);
assert(data);
prop_dictionary_set(pkg_metad, "install-script", data);
prop_object_release(data);
free(instbuf);
}
if (rembuf != NULL) {
data = prop_data_create_data(rembuf, rembufsiz);
assert(data);
prop_dictionary_set(pkg_metad, "remove-script", data);
prop_object_release(data);
free(rembuf);
}
/* Remove unneeded objs from transaction */
prop_dictionary_remove(pkg_metad, "remove-and-update");
prop_dictionary_remove(pkg_metad, "transaction");
prop_dictionary_remove(pkg_metad, "state");
/*
* Externalize pkg dictionary to metadir.
*/
if (access(xhp->metadir, R_OK|X_OK) == -1) {
if (errno == ENOENT) {
xbps_mkpath(xhp->metadir, 0755);
} else {
rv = errno;
goto out;
}
}
buf = xbps_xasprintf("%s/.%s.plist", XBPS_META_PATH, pkgname);
if (!prop_dictionary_externalize_to_file(pkg_metad, buf)) {
rv = errno;
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
errno, pkgname, version,
"%s: [unpack] failed to extract metadata file `%s': %s",
pkgver, buf, strerror(errno));
free(buf);
goto out;
}
free(buf);
out:
if (prop_object_type(pkg_metad) == PROP_TYPE_DICTIONARY)
prop_object_release(pkg_metad);
if (prop_object_type(filesd) == PROP_TYPE_DICTIONARY)
prop_object_release(filesd);
return rv;
}
int HIDDEN
xbps_unpack_binary_pkg(struct xbps_handle *xhp, prop_dictionary_t pkg_repod)
{
struct archive *ar = NULL;
struct stat pkg_stat;
const char *pkgname, *version, *pkgver;
char *bpkg;
int pkg_fd, rv = 0;
assert(prop_object_type(pkg_repod) == PROP_TYPE_DICTIONARY);
prop_dictionary_get_cstring_nocopy(pkg_repod, "pkgname", &pkgname);
prop_dictionary_get_cstring_nocopy(pkg_repod, "version", &version);
prop_dictionary_get_cstring_nocopy(pkg_repod, "pkgver", &pkgver);
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK, 0, pkgname, version, NULL);
bpkg = xbps_repository_pkg_path(xhp, pkg_repod);
if (bpkg == NULL) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
errno, pkgname, version,
"%s: [unpack] cannot determine binary package "
"file for `%s': %s", pkgver, bpkg, strerror(errno));
return errno;
}
if ((ar = archive_read_new()) == NULL) {
free(bpkg);
return ENOMEM;
}
/*
* Enable support for tar format and gzip/bzip2/lzma compression methods.
*/
archive_read_support_compression_gzip(ar);
archive_read_support_compression_bzip2(ar);
archive_read_support_compression_xz(ar);
archive_read_support_format_tar(ar);
pkg_fd = open(bpkg, O_RDONLY|O_CLOEXEC);
if (pkg_fd == -1) {
rv = archive_errno(ar);
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgname, version,
"%s: [unpack] failed to open binary package `%s': %s",
pkgver, bpkg, strerror(rv));
free(bpkg);
archive_read_free(ar);
return rv;
}
archive_read_open_fd(ar, pkg_fd, ARCHIVE_READ_BLOCKSIZE);
free(bpkg);
#ifdef HAVE_POSIX_FADVISE
fstat(pkg_fd, &pkg_stat);
posix_fadvise(pkg_fd, 0, pkg_stat.st_size, POSIX_FADV_SEQUENTIAL);
#endif
/*
* Extract archive files.
*/
if ((rv = unpack_archive(xhp, pkg_repod, ar)) != 0) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgname, version,
"%s: [unpack] failed to unpack files from archive: %s",
pkgver, strerror(rv));
goto out;
}
#ifdef HAVE_POSIX_FADVISE
posix_fadvise(pkg_fd, 0, pkg_stat.st_size, POSIX_FADV_DONTNEED);
#endif
/*
* Set package state to unpacked.
*/
if ((rv = xbps_set_pkg_state_installed(xhp, pkgname, version,
XBPS_PKG_STATE_UNPACKED)) != 0) {
xbps_set_cb_state(xhp, XBPS_STATE_UNPACK_FAIL,
rv, pkgname, version,
"%s: [unpack] failed to set state to unpacked: %s",
pkgver, strerror(rv));
}
out:
close(pkg_fd);
if (ar)
archive_read_free(ar);
return rv;
}