build system: "make hosttools" doesn't exist, remove it from "make help"
[oweals/busybox.git] / archival / dpkg.c
index befb91d6a0674adec4ec5464ecaf5fd8a22ec612..2893cfc2dd2fe560f0379efe59dc82c1f60ce0a1 100644 (file)
@@ -12,9 +12,8 @@
  *
  *  started life as a busybox implementation of udpkg
  *
- * licensed under gplv2 or later, see file license in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  */
-
 /*
  * known difference between busybox dpkg and the official dpkg that i don't
  * consider important, its worth keeping a note of differences anyway, just to
  *
  * bugs that need to be fixed
  *  - (unknown, please let me know when you find any)
- *
  */
 
+//config:config DPKG
+//config:      bool "dpkg"
+//config:      default n
+//config:      select FEATURE_SEAMLESS_GZ
+//config:      help
+//config:        dpkg is a medium-level tool to install, build, remove and manage
+//config:        Debian packages.
+//config:
+//config:        This implementation of dpkg has a number of limitations,
+//config:        you should use the official dpkg if possible.
+
+//applet:IF_DPKG(APPLET(dpkg, BB_DIR_USR_BIN, BB_SUID_DROP))
+//kbuild:lib-$(CONFIG_DPKG) += dpkg.o
+
+//usage:#define dpkg_trivial_usage
+//usage:       "[-ilCPru] [-F OPT] PACKAGE"
+//usage:#define dpkg_full_usage "\n\n"
+//usage:       "Install, remove and manage Debian packages\n"
+//usage:       IF_LONG_OPTS(
+//usage:     "\n       -i,--install    Install the package"
+//usage:     "\n       -l,--list       List of installed packages"
+//usage:     "\n       --configure     Configure an unpackaged package"
+//usage:     "\n       -P,--purge      Purge all files of a package"
+//usage:     "\n       -r,--remove     Remove all but the configuration files for a package"
+//usage:     "\n       --unpack        Unpack a package, but don't configure it"
+//usage:     "\n       --force-depends Ignore dependency problems"
+//usage:     "\n       --force-confnew Overwrite existing config files when installing"
+//usage:     "\n       --force-confold Keep old config files when installing"
+//usage:       )
+//usage:       IF_NOT_LONG_OPTS(
+//usage:     "\n       -i              Install the package"
+//usage:     "\n       -l              List of installed packages"
+//usage:     "\n       -C              Configure an unpackaged package"
+//usage:     "\n       -P              Purge all files of a package"
+//usage:     "\n       -r              Remove all but the configuration files for a package"
+//usage:     "\n       -u              Unpack a package, but don't configure it"
+//usage:     "\n       -F depends      Ignore dependency problems"
+//usage:     "\n       -F confnew      Overwrite existing config files when installing"
+//usage:     "\n       -F confold      Keep old config files when installing"
+//usage:       )
+
 #include "libbb.h"
 #include <fnmatch.h>
-#include "unarchive.h"
+#include "bb_archive.h"
 
 /* note: if you vary hash_prime sizes be aware,
  * 1) tweaking these will have a big effect on how much memory this program uses.
@@ -245,7 +284,7 @@ static int version_compare(const unsigned ver1, const unsigned ver2)
 {
        char *ch_ver1 = name_hashtable[ver1];
        char *ch_ver2 = name_hashtable[ver2];
-       unsigned long epoch1 = 0, epoch2 = 0;
+       unsigned epoch1 = 0, epoch2 = 0;
        char *colon;
        char *deb_ver1, *deb_ver2;
        char *upstream_ver1;
@@ -278,17 +317,16 @@ static int version_compare(const unsigned ver1, const unsigned ver2)
        deb_ver1 = strrchr(upstream_ver1, '-');
        deb_ver2 = strrchr(upstream_ver2, '-');
        if (deb_ver1) {
-               deb_ver1[0] = '\0';
-               deb_ver1++;
+               *deb_ver1++ = '\0';
        }
        if (deb_ver2) {
-               deb_ver2[0] = '\0';
-               deb_ver2++;
+               *deb_ver2++ = '\0';
        }
        result = version_compare_part(upstream_ver1, upstream_ver2);
-       if (!result)
+       if (result == 0) {
                /* Compare debian versions */
                result = version_compare_part(deb_ver1, deb_ver2);
+       }
 
        free(upstream_ver1);
        free(upstream_ver2);
@@ -675,28 +713,21 @@ static unsigned get_status(const unsigned status_node, const int num)
 
 static void set_status(const unsigned status_node_num, const char *new_value, const int position)
 {
-       const unsigned new_value_len = strlen(new_value);
        const unsigned new_value_num = search_name_hashtable(new_value);
        unsigned want = get_status(status_node_num, 1);
        unsigned flag = get_status(status_node_num, 2);
        unsigned status = get_status(status_node_num, 3);
-       int want_len = strlen(name_hashtable[want]);
-       int flag_len = strlen(name_hashtable[flag]);
-       int status_len = strlen(name_hashtable[status]);
        char *new_status;
 
        switch (position) {
                case 1:
                        want = new_value_num;
-                       want_len = new_value_len;
                        break;
                case 2:
                        flag = new_value_num;
-                       flag_len = new_value_len;
                        break;
                case 3:
                        status = new_value_num;
-                       status_len = new_value_len;
                        break;
                default:
                        bb_error_msg_and_die("DEBUG ONLY: this shouldnt happen");
@@ -867,7 +898,7 @@ static void write_status_file(deb_file_t **deb_file)
                                        write_flag = TRUE;
                                        fputs("\n", new_status_file);
                                }
-                               else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
+                               else if (strcmp("config-files", name_hashtable[state_status]) == 0) {
                                        /* only change the status line */
                                        while (1) {
                                                char *field_name;
@@ -940,8 +971,8 @@ static int package_satisfies_dependency(int package, int depend_type)
                return 0;
 
        switch (depend_type) {
-       case EDGE_PRE_DEPENDS:  return get_status(status_num, 3) == search_name_hashtable("installed");
-       case EDGE_DEPENDS:      return get_status(status_num, 1) == search_name_hashtable("install");
+       case EDGE_PRE_DEPENDS: return get_status(status_num, 3) == search_name_hashtable("installed");
+       case EDGE_DEPENDS:     return get_status(status_num, 1) == search_name_hashtable("install");
        }
        return 0;
 }
@@ -968,7 +999,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count
                conflicts[conflicts_num] = package_num;
                conflicts_num++;
                /* add provides to conflicts list */
-               for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
+               for (j = 0; j < package_hashtable[package_num]->num_of_edges; j++) {
                        if (package_hashtable[package_num]->edge[j]->type == EDGE_PROVIDES) {
                                const int conflicts_package_num = search_package_hashtable(
                                        package_hashtable[package_num]->edge[j]->name,
@@ -1007,8 +1038,8 @@ static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count
                        if (package_edge->type == EDGE_CONFLICTS) {
                                const unsigned package_num =
                                        search_package_hashtable(package_edge->name,
-                                                                package_edge->version,
-                                                                package_edge->operator);
+                                                               package_edge->version,
+                                                               package_edge->operator);
                                int result = 0;
                                if (package_hashtable[package_num] != NULL) {
                                        status_num = search_status_hashtable(name_hashtable[package_hashtable[package_num]->name]);
@@ -1068,12 +1099,13 @@ static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count
 
                        if (package_edge->type == EDGE_OR_PRE_DEPENDS
                         || package_edge->type == EDGE_OR_DEPENDS
-                       ) {     /* start an EDGE_OR_ list */
+                       ) {
+                               /* start an EDGE_OR_ list */
                                number_of_alternatives = package_edge->version;
                                root_of_alternatives = package_edge;
                                continue;
                        }
-                       if (number_of_alternatives == 0) {      /* not in the middle of an EDGE_OR_ list */
+                       if (number_of_alternatives == 0) {  /* not in the middle of an EDGE_OR_ list */
                                number_of_alternatives = 1;
                                root_of_alternatives = NULL;
                        }
@@ -1094,7 +1126,7 @@ static int check_deps(deb_file_t **deb_file, int deb_start /*, int dep_max_count
                                 */
                                if (root_of_alternatives && package_edge->type != root_of_alternatives->type - 1)
                                        bb_error_msg_and_die("fatal error, package dependencies corrupt: %d != %d - 1",
-                                                            package_edge->type, root_of_alternatives->type);
+                                                       package_edge->type, root_of_alternatives->type);
 
                                if (package_hashtable[package_num] != NULL)
                                        result = !package_satisfies_dependency(package_num, package_edge->type);
@@ -1525,8 +1557,8 @@ static char FAST_FUNC filter_rename_config(archive_handle_t *archive_handle)
                buf = xmalloc(4096);
                md5_begin(&md5);
                while ((count = safe_read(fd, buf, 4096)) > 0)
-                       md5_hash(buf, count, &md5);
-               md5_end(buf, &md5); /* using buf as result storage */
+                       md5_hash(&md5, buf, count);
+               md5_end(&md5, buf); /* using buf as result storage */
                close(fd);
 
                md5line = xmalloc(16 * 2 + 2 + strlen(name_ptr) + 1);
@@ -1570,13 +1602,16 @@ static void FAST_FUNC data_extract_all_prefix(archive_handle_t *archive_handle)
 }
 
 enum {
+       /* Commands */
        OPT_configure            = (1 << 0),
-       OPT_force                = (1 << 1),
-       OPT_install              = (1 << 2),
-       OPT_list_installed       = (1 << 3),
-       OPT_purge                = (1 << 4),
-       OPT_remove               = (1 << 5),
-       OPT_unpack               = (1 << 6),
+       OPT_install              = (1 << 1),
+       OPT_list_installed       = (1 << 2),
+       OPT_purge                = (1 << 3),
+       OPT_remove               = (1 << 4),
+       OPT_unpack               = (1 << 5),
+       OPTMASK_cmd              = (1 << 6) - 1,
+       /* Options */
+       OPT_force                = (1 << 6),
        OPT_force_ignore_depends = (1 << 7),
        OPT_force_confnew        = (1 << 8),
        OPT_force_confold        = (1 << 9),
@@ -1642,20 +1677,25 @@ static void unpack_package(deb_file_t *deb_file)
        archive_handle = init_archive_deb_ar(deb_file->filename);
        init_archive_deb_data(archive_handle);
        archive_handle->dpkg__sub_archive->accept = conffile_list;
+       /* Why ARCHIVE_REMEMBER_NAMES?
+        * We want names collected in ->passed list even if conffile_list
+        * is NULL (otherwise get_header_tar may optimize name saving out):
+        */
+       archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_REMEMBER_NAMES | ARCHIVE_UNLINK_OLD;
        archive_handle->dpkg__sub_archive->filter = filter_rename_config;
        archive_handle->dpkg__sub_archive->action_data = data_extract_all_prefix;
        archive_handle->dpkg__sub_archive->dpkg__buffer = (char*)"/"; /* huh? */
-       archive_handle->dpkg__sub_archive->ah_flags |= ARCHIVE_UNLINK_OLD;
        unpack_ar_archive(archive_handle);
 
        /* Create the list file */
        list_filename = xasprintf("/var/lib/dpkg/info/%s.%s", package_name, "list");
        out_stream = xfopen_for_write(list_filename);
+       archive_handle->dpkg__sub_archive->passed = llist_rev(archive_handle->dpkg__sub_archive->passed);
        while (archive_handle->dpkg__sub_archive->passed) {
+               char *filename = llist_pop(&archive_handle->dpkg__sub_archive->passed);
                /* the leading . has been stripped by data_extract_all_prefix already */
-               fputs(archive_handle->dpkg__sub_archive->passed->data, out_stream);
-               fputc('\n', out_stream);
-               archive_handle->dpkg__sub_archive->passed = archive_handle->dpkg__sub_archive->passed->link;
+               fprintf(out_stream, "%s\n", filename);
+               free(filename);
        }
        fclose(out_stream);
 
@@ -1716,7 +1756,8 @@ int dpkg_main(int argc UNUSED_PARAM, char **argv)
        INIT_G();
 
        IF_LONG_OPTS(applet_long_options = dpkg_longopts);
-       opt = getopt32(argv, "CF:ilPru", &str_f);
+       opt = getopt32(argv, "CilPruF:", &str_f);
+       argv += optind;
        //if (opt & OPT_configure) ... // -C
        if (opt & OPT_force) { // -F (--force in official dpkg)
                if (strcmp(str_f, "depends") == 0)
@@ -1725,7 +1766,8 @@ int dpkg_main(int argc UNUSED_PARAM, char **argv)
                        opt |= OPT_force_confnew;
                else if (strcmp(str_f, "confold") == 0)
                        opt |= OPT_force_confold;
-               else bb_show_usage();
+               else
+                       bb_show_usage();
                option_mask32 = opt;
        }
        //if (opt & OPT_install) ... // -i
@@ -1733,17 +1775,18 @@ int dpkg_main(int argc UNUSED_PARAM, char **argv)
        //if (opt & OPT_purge) ... // -P
        //if (opt & OPT_remove) ... // -r
        //if (opt & OPT_unpack) ... // -u (--unpack in official dpkg)
-       argv += optind;
-       /* check for non-option argument if expected  */
-       if (!opt || (!argv[0] && !(opt & OPT_list_installed)))
+       if (!(opt & OPTMASK_cmd) /* no cmd */
+        || ((opt & OPTMASK_cmd) & ((opt & OPTMASK_cmd)-1)) /* more than one cmd */
+       ) {
                bb_show_usage();
+       }
 
 /*     puts("(Reading database ... xxxxx files and directories installed.)"); */
        index_status_file("/var/lib/dpkg/status");
 
        /* if the list action was given print the installed packages and exit */
        if (opt & OPT_list_installed) {
-               list_packages(argv[0]);
+               list_packages(argv[0]); /* param can be NULL */
                return EXIT_SUCCESS;
        }