dpkg: support config file overwrite options
function old new delta filter_rename_config - 244 +244 static.dpkg_longopts - 112 +112 dpkg_main 3901 3980 +79 unpack_package 515 587 +72 append_control_file_to_llist - 72 +72 data_extract_all_prefix 88 116 +28 ------------------------------------------------------------------------------ (add/remove: 3/0 grow/shrink: 3/0 up/down: 607/0) Total: 607 bytes Signed-off-by: Kim B. Heino <Kim.Heino@bluegiga.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Kim B. Heino
Denys Vlasenko
parent
1d448cff65
commit
3d43aed10c
126
archival/dpkg.c
126
archival/dpkg.c
@ -1308,7 +1308,7 @@ static void list_packages(const char *pattern)
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name_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->name];
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vers_str = name_hashtable[package_hashtable[status_hashtable[i]->package]->version];
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if (pattern && fnmatch(pattern, name_str, 0))
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if (pattern && fnmatch(pattern, name_str, 0) != 0)
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continue;
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/* get abbreviation for status field 1 */
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@ -1491,6 +1491,58 @@ static char *deb_extract_control_file_to_buffer(archive_handle_t *ar_handle, lli
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return ar_handle->dpkg__sub_archive->dpkg__buffer;
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}
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static void append_control_file_to_llist(const char *package_name, const char *control_name, llist_t **ll)
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{
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FILE *fp;
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char *filename, *line;
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filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, control_name);
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fp = fopen_for_read(filename);
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free(filename);
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if (fp != NULL) {
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while ((line = xmalloc_fgetline(fp)) != NULL)
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llist_add_to(ll, line);
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fclose(fp);
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}
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}
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static char FAST_FUNC filter_rename_config(archive_handle_t *archive_handle)
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{
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int fd;
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char *name_ptr = archive_handle->file_header->name + 1;
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/* Is this file marked as config file? */
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if (!find_list_entry(archive_handle->accept, name_ptr))
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return EXIT_SUCCESS; /* no */
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fd = open(name_ptr, O_RDONLY);
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if (fd >= 0) {
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md5_ctx_t md5;
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char *md5line, *buf;
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int count;
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/* Calculate MD5 of existing file */
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buf = xmalloc(4096);
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md5_begin(&md5);
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while ((count = safe_read(fd, buf, 4096)) > 0)
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md5_hash(buf, count, &md5);
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md5_end(buf, &md5); /* using buf as result storage */
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close(fd);
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md5line = xmalloc(16 * 2 + 2 + strlen(name_ptr) + 1);
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sprintf(bin2hex(md5line, buf, 16), " %s", name_ptr);
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free(buf);
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/* Is it changed after install? */
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if (find_list_entry(archive_handle->accept, md5line) == NULL) {
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printf("Warning: Creating %s as %s.dpkg-new\n", name_ptr, name_ptr);
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archive_handle->file_header->name = xasprintf("%s.dpkg-new", archive_handle->file_header->name);
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}
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free(md5line);
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}
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return EXIT_SUCCESS;
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}
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static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
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{
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char *name_ptr = archive_handle->file_header->name;
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@ -1500,7 +1552,7 @@ static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
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name_ptr++;
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/* Skip all leading "./" and "../" */
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while (name_ptr[0] == '.') {
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if (name_ptr[1] == '.' && name_ptr[2] == '/')
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if (name_ptr[1] == '.')
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name_ptr++;
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if (name_ptr[1] != '/')
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break;
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@ -1510,9 +1562,26 @@ static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
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if (name_ptr[0] != '\0') {
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archive_handle->file_header->name = xasprintf("%s%s", archive_handle->dpkg__buffer, name_ptr);
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data_extract_all(archive_handle);
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if (fnmatch("*.dpkg-new", archive_handle->file_header->name, 0) == 0) {
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/* remove .dpkg-new suffix */
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archive_handle->file_header->name[strlen(archive_handle->file_header->name) - 9] = '\0';
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}
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}
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}
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enum {
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OPT_configure = (1 << 0),
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OPT_force = (1 << 1),
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OPT_install = (1 << 2),
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OPT_list_installed = (1 << 3),
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OPT_purge = (1 << 4),
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OPT_remove = (1 << 5),
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OPT_unpack = (1 << 6),
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OPT_force_ignore_depends = (1 << 7),
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OPT_force_confnew = (1 << 8),
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OPT_force_confold = (1 << 9),
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};
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static void unpack_package(deb_file_t *deb_file)
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{
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const char *package_name = name_hashtable[package_hashtable[deb_file->package]->name];
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@ -1523,14 +1592,21 @@ static void unpack_package(deb_file_t *deb_file)
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archive_handle_t *archive_handle;
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FILE *out_stream;
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llist_t *accept_list;
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llist_t *conffile_list;
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int i;
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/* If existing version, remove it first */
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conffile_list = NULL;
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if (strcmp(name_hashtable[get_status(status_num, 3)], "installed") == 0) {
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/* Package is already installed, remove old version first */
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printf("Preparing to replace %s %s (using %s)...\n", package_name,
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name_hashtable[package_hashtable[status_package_num]->version],
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deb_file->filename);
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/* Read md5sums from old package */
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if (!(option_mask32 & OPT_force_confold))
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append_control_file_to_llist(package_name, "md5sums", &conffile_list);
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remove_package(status_package_num, 0);
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} else {
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printf("Unpacking %s (from %s)...\n", package_name, deb_file->filename);
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@ -1558,9 +1634,15 @@ static void unpack_package(deb_file_t *deb_file)
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/* Run the preinst prior to extracting */
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run_package_script_or_die(package_name, "preinst");
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/* Don't overwrite existing config files */
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if (!(option_mask32 & OPT_force_confnew))
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append_control_file_to_llist(package_name, "conffiles", &conffile_list);
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/* Extract data.tar.gz to the root directory */
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archive_handle = init_archive_deb_ar(deb_file->filename);
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init_archive_deb_data(archive_handle);
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archive_handle->dpkg__sub_archive->accept = conffile_list;
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archive_handle->dpkg__sub_archive->filter = filter_rename_config;
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archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
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archive_handle->dpkg__sub_archive->dpkg__buffer = (char*)"/"; /* huh? */
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archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
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@ -1614,23 +1696,37 @@ int dpkg_main(int argc UNUSED_PARAM, char **argv)
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int state_status;
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int status_num;
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int i;
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enum {
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OPT_configure = 0x1,
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OPT_force_ignore_depends = 0x2,
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OPT_install = 0x4,
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OPT_list_installed = 0x8,
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OPT_purge = 0x10,
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OPT_remove = 0x20,
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OPT_unpack = 0x40,
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};
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#if ENABLE_LONG_OPTS
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static const char dpkg_longopts[] ALIGN1 =
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// FIXME: we use -C non-compatibly, should be:
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// "-C|--audit Check for broken package(s)"
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"configure\0" No_argument "C"
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"force\0" Required_argument "F"
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"install\0" No_argument "i"
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"list\0" No_argument "l"
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"purge\0" No_argument "P"
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"remove\0" No_argument "r"
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"unpack\0" No_argument "u"
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"force-depends\0" No_argument "\xff"
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"force-confnew\0" No_argument "\xfe"
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"force-confold\0" No_argument "\xfd"
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;
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#endif
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INIT_G();
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IF_LONG_OPTS(applet_long_options = dpkg_longopts);
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opt = getopt32(argv, "CF:ilPru", &str_f);
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//if (opt & OPT_configure) ... // -C
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if (opt & OPT_force_ignore_depends) { // -F (--force in official dpkg)
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if (strcmp(str_f, "depends"))
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opt &= ~OPT_force_ignore_depends;
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if (opt & OPT_force) { // -F (--force in official dpkg)
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if (strcmp(str_f, "depends") == 0)
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opt |= OPT_force_ignore_depends;
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else if (strcmp(str_f, "confnew") == 0)
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opt |= OPT_force_confnew;
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else if (strcmp(str_f, "confold") == 0)
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opt |= OPT_force_confold;
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else bb_show_usage();
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option_mask32 = opt;
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}
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//if (opt & OPT_install) ... // -i
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//if (opt & OPT_list_installed) ... // -l
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@ -1639,7 +1735,7 @@ int dpkg_main(int argc UNUSED_PARAM, char **argv)
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//if (opt & OPT_unpack) ... // -u (--unpack in official dpkg)
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argv += optind;
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/* check for non-option argument if expected */
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if (!opt || (!argv[0] && !(opt && OPT_list_installed)))
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if (!opt || (!argv[0] && !(opt & OPT_list_installed)))
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bb_show_usage();
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/* puts("(Reading database ... xxxxx files and directories installed.)"); */
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@ -931,13 +931,28 @@
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#define dpkg_full_usage "\n\n" \
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"Install, remove and manage Debian packages\n" \
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"\nOptions:" \
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IF_LONG_OPTS( \
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"\n -i,--install Install the package" \
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"\n -l,--list List of installed packages" \
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"\n --configure Configure an unpackaged package" \
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"\n -P,--purge Purge all files of a package" \
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"\n -r,--remove Remove all but the configuration files for a package" \
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"\n --unpack Unpack a package, but don't configure it" \
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"\n --force-depends Ignore dependency problems" \
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"\n --force-confnew Overwrite existing config files when installing" \
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"\n --force-confold Keep old config files when installing" \
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) \
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IF_NOT_LONG_OPTS( \
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"\n -i Install the package" \
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"\n -l List of installed packages" \
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"\n -C Configure an unpackaged package" \
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"\n -F depends Ignore dependency problems" \
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"\n -P Purge all files of a package" \
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"\n -r Remove all but the configuration files for a package" \
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"\n -u Unpack a package, but don't configure it" \
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"\n -F depends Ignore dependency problems" \
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"\n -F confnew Overwrite existing config files when installing" \
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"\n -F confold Keep old config files when installing" \
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)
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#define dpkg_deb_trivial_usage \
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"[-cefxX] FILE [argument]"
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