/*-
* Copyright (c) 2008-2009 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.
*/
#include <stdio.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <xbps_api.h>
static int unpack_archive_fini(struct archive *, prop_dictionary_t, bool);
static int remove_obsoletes(prop_dictionary_t, prop_dictionary_t);
static void set_extract_flags(int *);
int SYMEXPORT
xbps_unpack_binary_pkg(prop_dictionary_t pkg, bool essential)
{
prop_string_t filename, repoloc, arch;
struct archive *ar = NULL;
const char *pkgname;
char *binfile = NULL;
int pkg_fd, rv = 0;
assert(pkg != NULL);
/*
* Append filename to the full path for binary pkg.
*/
if (!prop_dictionary_get_cstring_nocopy(pkg, "pkgname", &pkgname))
return errno;
filename = prop_dictionary_get(pkg, "filename");
arch = prop_dictionary_get(pkg, "architecture");
repoloc = prop_dictionary_get(pkg, "repository");
if (filename == NULL || arch == NULL || repoloc == NULL)
return ENOTSUP;
binfile = xbps_xasprintf("%s/%s/%s",
prop_string_cstring_nocopy(repoloc),
prop_string_cstring_nocopy(arch),
prop_string_cstring_nocopy(filename));
if (binfile == NULL)
return EINVAL;
if ((pkg_fd = open(binfile, O_RDONLY)) == -1) {
rv = errno;
goto out;
}
ar = archive_read_new();
if (ar == NULL) {
rv = errno;
goto out;
}
/*
* Enable support for tar format and all compression methods.
*/
archive_read_support_compression_all(ar);
archive_read_support_format_tar(ar);
if ((rv = archive_read_open_fd(ar, pkg_fd,
ARCHIVE_READ_BLOCKSIZE)) != 0)
goto out;
rv = unpack_archive_fini(ar, pkg, essential);
/*
* If installation of package was successful, make sure the package
* is really on storage (if possible).
*/
if (rv == 0) {
if (fsync(pkg_fd) == -1) {
rv = errno;
goto out;
}
/*
* Set package state to unpacked.
*/
rv = xbps_set_pkg_state_installed(pkgname,
XBPS_PKG_STATE_UNPACKED);
}
out:
if (ar)
archive_read_finish(ar);
if (pkg_fd != -1)
(void)close(pkg_fd);
if (binfile)
free(binfile);
return rv;
}
/*
* Flags for extracting files in binary packages. If a package
* is marked as "essential", its files will be overwritten and then
* the old and new dictionaries are compared to find out if there
* are some files that were in the old package that should be removed.
*/
#define EXTRACT_FLAGS ARCHIVE_EXTRACT_SECURE_NODOTDOT | \
ARCHIVE_EXTRACT_SECURE_SYMLINKS | \
ARCHIVE_EXTRACT_NO_OVERWRITE | \
ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER
#define FEXTRACT_FLAGS ARCHIVE_EXTRACT_OWNER | ARCHIVE_EXTRACT_PERM | \
ARCHIVE_EXTRACT_TIME | EXTRACT_FLAGS
static void
set_extract_flags(int *flags)
{
*flags = 0;
if (getuid() == 0)
*flags = FEXTRACT_FLAGS;
else
*flags = EXTRACT_FLAGS;
}
static int
install_config_file(prop_dictionary_t d, struct archive_entry *entry,
const char *pkgname, int *flags, bool *skip)
{
prop_dictionary_t forigd;
prop_object_t obj, obj2;
prop_object_iterator_t iter, iter2;
const char *cffile, *sha256_new = NULL;
char *buf, *sha256_cur = NULL, *sha256_orig = NULL;
int rv = 0;
bool install_new = false;
if (d == NULL)
return 0;
iter = xbps_get_array_iter_from_dict(d, "conf_files");
if (iter == NULL)
return 0;
/*
* Get original hash for the file from current
* installed package.
*/
buf = xbps_xasprintf(".%s/metadata/%s/%s", XBPS_META_PATH,
pkgname, XBPS_PKGFILES);
if (buf == NULL)
return errno;
forigd = prop_dictionary_internalize_from_file(buf);
free(buf);
if (forigd == NULL) {
install_new = true;
goto out;
}
iter2 = xbps_get_array_iter_from_dict(forigd, "conf_files");
if (iter2 != NULL) {
while ((obj2 = prop_object_iterator_next(iter2))) {
if (!prop_dictionary_get_cstring_nocopy(obj2,
"file", &cffile)) {
prop_object_iterator_release(iter2);
rv = errno;
goto out;
}
buf = xbps_xasprintf(".%s", cffile);
if (buf == NULL) {
prop_object_iterator_release(iter2);
rv = errno;
goto out;
}
if (strcmp(archive_entry_pathname(entry), buf) == 0) {
prop_dictionary_get_cstring(obj2, "sha256",
&sha256_orig);
free(buf);
break;
}
free(buf);
buf = NULL;
}
prop_object_iterator_release(iter2);
}
prop_object_release(forigd);
/*
* First case: original hash not found, install new file.
*/
if (sha256_orig == NULL) {
install_new = true;
goto out;
}
/*
* Compare original, installed and new hash for current file.
*/
while ((obj = prop_object_iterator_next(iter))) {
if (!prop_dictionary_get_cstring_nocopy(obj,
"file", &cffile)) {
prop_object_iterator_release(iter);
return errno;
}
buf = xbps_xasprintf(".%s", cffile);
if (buf == NULL) {
prop_object_iterator_release(iter);
return errno;
}
if (strcmp(archive_entry_pathname(entry), buf)) {
free(buf);
buf = NULL;
continue;
}
sha256_cur = xbps_get_file_hash(buf);
free(buf);
if (!prop_dictionary_get_cstring_nocopy(obj,
"sha256", &sha256_new)) {
rv = EINVAL;
break;
}
if (sha256_cur == NULL) {
if (errno == ENOENT) {
/*
* File not installed, install new one.
*/
install_new = true;
break;
} else {
rv = errno;
break;
}
}
/*
* Orig = X, Curr = X, New = X
*
* Install new file.
*/
if ((strcmp(sha256_orig, sha256_cur) == 0) &&
(strcmp(sha256_orig, sha256_new) == 0) &&
(strcmp(sha256_cur, sha256_new) == 0)) {
install_new = true;
break;
/*
* Orig = X, Curr = X, New = Y
*
* Install new file.
*/
} else if ((strcmp(sha256_orig, sha256_cur) == 0) &&
(strcmp(sha256_orig, sha256_new)) &&
(strcmp(sha256_cur, sha256_new))) {
printf("Updating %s file with new version.\n",
cffile);
install_new = true;
break;
/*
* Orig = X, Curr = Y, New = X
*
* Keep current file as is.
*/
} else if ((strcmp(sha256_orig, sha256_new) == 0) &&
(strcmp(sha256_cur, sha256_new)) &&
(strcmp(sha256_orig, sha256_cur))) {
printf("Keeping modified file %s.\n", cffile);
*skip = true;
break;
/*
* Orig = X, Curr = Y, New = Y
*
* Install new file.
*/
} else if ((strcmp(sha256_cur, sha256_new) == 0) &&
(strcmp(sha256_orig, sha256_new)) &&
(strcmp(sha256_orig, sha256_cur))) {
install_new = true;
break;
/*
* Orig = X, Curr = Y, New = Z
*
* Install new file as file.new.
*/
} else if ((strcmp(sha256_orig, sha256_cur)) &&
(strcmp(sha256_cur, sha256_new)) &&
(strcmp(sha256_orig, sha256_new))) {
buf = xbps_xasprintf(".%s.new", cffile);
if (buf == NULL) {
rv = errno;
break;
}
printf("Keeping modified file %s.\n", cffile);
printf("Installing new version as %s.new.\n", cffile);
install_new = true;
archive_entry_set_pathname(entry, buf);
free(buf);
break;
}
}
out:
if (install_new) {
*flags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE;
*flags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
}
if (sha256_orig)
free(sha256_orig);
if (sha256_cur)
free(sha256_cur);
prop_object_iterator_release(iter);
return rv;
}
/*
* TODO: remove printfs and return appropiate errors to be interpreted by
* the consumer.
*/
static int
unpack_archive_fini(struct archive *ar, prop_dictionary_t pkg,
bool essential)
{
prop_dictionary_t filesd = NULL, old_filesd = NULL;
struct archive_entry *entry;
const char *pkgname, *version, *rootdir, *entry_str;
char *buf, *buf2;
int rv = 0, flags, lflags;
bool actgt = false, skip_entry = false;
assert(ar != NULL);
assert(pkg != NULL);
rootdir = xbps_get_rootdir();
flags = xbps_get_flags();
if (strcmp(rootdir, "") == 0)
rootdir = "/";
if (chdir(rootdir) == -1)
return errno;
if (!prop_dictionary_get_cstring_nocopy(pkg, "pkgname", &pkgname))
return errno;
if (!prop_dictionary_get_cstring_nocopy(pkg, "version", &version))
return errno;
while (archive_read_next_header(ar, &entry) == ARCHIVE_OK) {
entry_str = archive_entry_pathname(entry);
set_extract_flags(&lflags);
if (((strcmp("./INSTALL", entry_str)) == 0) ||
((strcmp("./REMOVE", entry_str)) == 0) ||
((strcmp("./files.plist", entry_str)) == 0) ||
((strcmp("./props.plist", entry_str)) == 0) || essential) {
/*
* Always overwrite files in essential packages,
* and metadata files.
*/
lflags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE;
lflags &= ~ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER;
}
/*
* Run the pre INSTALL action if the file is there.
*/
if (strcmp("./INSTALL", entry_str) == 0) {
buf = xbps_xasprintf(".%s/metadata/%s/INSTALL",
XBPS_META_PATH, pkgname);
if (buf == NULL)
return errno;
actgt = true;
archive_entry_set_pathname(entry, buf);
if (archive_read_extract(ar, entry, lflags) != 0) {
if ((rv = archive_errno(ar)) != EEXIST) {
free(buf);
return rv;
}
}
if ((rv = xbps_file_chdir_exec(rootdir, buf, "pre",
pkgname, version, NULL)) != 0) {
free(buf);
printf("%s: preinst action target error %s\n",
pkgname, strerror(errno));
return rv;
}
/* pass to the next entry if successful */
free(buf);
continue;
/*
* Unpack metadata files in final directory.
*/
} else if (strcmp("./REMOVE", entry_str) == 0) {
buf2 = xbps_xasprintf(".%s/metadata/%s/REMOVE",
XBPS_META_PATH, pkgname);
if (buf2 == NULL)
return errno;
archive_entry_set_pathname(entry, buf2);
free(buf2);
buf2 = NULL;
} else if (strcmp("./files.plist", entry_str) == 0) {
/*
* Now we have a dictionary from the entry
* in memory. Will be written to disk later, when
* all files are extracted.
*/
filesd = xbps_read_dict_from_archive_entry(ar, entry);
if (filesd == NULL)
return errno;
/* Pass to next entry */
continue;
} else if (strcmp("./props.plist", entry_str) == 0) {
buf2 = xbps_xasprintf(".%s/metadata/%s/props.plist",
XBPS_META_PATH, pkgname);
if (buf2 == NULL)
return errno;
archive_entry_set_pathname(entry, buf2);
free(buf2);
} else {
/*
* Handle configuration files.
*/
if ((rv = install_config_file(filesd, entry, pkgname,
&lflags, &skip_entry)) != 0) {
prop_object_release(filesd);
return rv;
}
if (skip_entry) {
archive_read_data_skip(ar);
skip_entry = false;
continue;
}
}
/*
* Extract entry from archive.
*/
if (archive_read_extract(ar, entry, lflags) != 0) {
rv = archive_errno(ar);
if (rv != EEXIST) {
printf("ERROR: %s...exiting!\n",
archive_error_string(ar));
return rv;;
} else if (rv == EEXIST) {
if (flags & XBPS_FLAG_VERBOSE) {
printf("WARNING: ignoring existent "
"path: %s\n",
archive_entry_pathname(entry));
}
rv = 0;
continue;
}
}
if (flags & XBPS_FLAG_VERBOSE)
printf(" %s\n", archive_entry_pathname(entry));
}
if ((rv = archive_errno(ar)) == 0) {
buf2 = xbps_xasprintf(".%s/metadata/%s/files.plist",
XBPS_META_PATH, pkgname);
if (buf2 == NULL) {
prop_object_release(filesd);
return errno;
}
/*
* Check if files.plist exists and pkg is marked as
* essential, in that case we need to check for obsolete
* files and remove them if necessary.
*/
if (essential && (access(buf2, R_OK) == 0)) {
old_filesd =
prop_dictionary_internalize_from_file(buf2);
if (old_filesd == NULL) {
prop_object_release(filesd);
free(buf2);
return errno;
}
rv = remove_obsoletes(old_filesd, filesd);
if (rv != 0) {
prop_object_release(old_filesd);
prop_object_release(filesd);
free(buf2);
return rv;
}
prop_object_release(old_filesd);
}
/*
* Now that all files were successfully unpacked, we
* can safely externalize files.plist because the path
* is reachable.
*/
if (!prop_dictionary_externalize_to_file(filesd, buf2)) {
prop_object_release(filesd);
free(buf2);
return errno;
}
free(buf2);
}
prop_object_release(filesd);
return rv;
}
static int
remove_obsoletes(prop_dictionary_t oldd, prop_dictionary_t newd)
{
prop_object_iterator_t iter, iter2;
prop_object_t obj, obj2;
prop_string_t oldstr, newstr;
const char *array_str = "files";
char *buf = NULL;
int rv = 0;
bool found, dolinks = false;
iter = iter2 = NULL;
obj = obj2 = NULL;
oldstr = newstr = NULL;
again:
iter = xbps_get_array_iter_from_dict(oldd, array_str);
if (iter == NULL)
return errno;
iter2 = xbps_get_array_iter_from_dict(newd, array_str);
if (iter2 == NULL) {
prop_object_iterator_release(iter);
return errno;
}
/*
* Check for obsolete files, i.e files/links available in
* the old package list not found in new package list.
*/
while ((obj = prop_object_iterator_next(iter))) {
found = false;
oldstr = prop_dictionary_get(obj, "file");
if (oldstr == NULL) {
rv = errno;
goto out;
}
while ((obj2 = prop_object_iterator_next(iter2))) {
newstr = prop_dictionary_get(obj2, "file");
if (newstr == NULL) {
rv = errno;
goto out;
}
if (prop_string_equals(oldstr, newstr)) {
found = true;
break;
}
}
prop_object_iterator_reset(iter2);
if (found)
continue;
/*
* Obsolete file found, remove it.
*/
buf = xbps_xasprintf(".%s", prop_string_cstring_nocopy(oldstr));
if (buf == NULL) {
rv = errno;
goto out;
}
if (remove(buf) == -1) {
printf("WARNING: couldn't remove obsolete %s: %s\n",
dolinks ? "link" : "file",
prop_string_cstring_nocopy(oldstr));
free(buf);
continue;
}
printf("Removed obsolete %s: %s\n",
dolinks ? "link" : "file",
prop_string_cstring_nocopy(oldstr));
free(buf);
}
if (!dolinks) {
/*
* Now look for obsolete links.
*/
dolinks = true;
array_str = "links";
prop_object_iterator_release(iter2);
prop_object_iterator_release(iter);
iter = iter2 = NULL;
goto again;
}
out:
prop_object_iterator_release(iter2);
prop_object_iterator_release(iter);
return rv;
}