1 /* opkg_remove.c - the opkg package management system
5 Copyright (C) 2001 University of Southern California
7 This program is free software; you can redistribute it and/or
8 modify it under the terms of the GNU General Public License as
9 published by the Free Software Foundation; either version 2, or (at
10 your option) any later version.
12 This program is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 General Public License for more details.
22 #include "opkg_message.h"
23 #include "opkg_remove.h"
25 #include "file_util.h"
26 #include "sprintf_alloc.h"
27 #include "libbb/libbb.h"
30 * Returns number of the number of packages depending on the packages provided by this package.
31 * Every package implicitly provides itself.
34 pkg_has_installed_dependents(pkg_t *pkg, abstract_pkg_t *** pdependents)
36 int nprovides = pkg->provides_count;
37 abstract_pkg_t **provides = pkg->provides;
38 unsigned int n_installed_dependents = 0;
40 for (i = 0; i < nprovides; i++) {
41 abstract_pkg_t *providee = provides[i];
42 abstract_pkg_t **dependers = providee->depended_upon_by;
43 abstract_pkg_t *dep_ab_pkg;
44 if (dependers == NULL)
46 while ((dep_ab_pkg = *dependers++) != NULL) {
47 if (dep_ab_pkg->state_status == SS_INSTALLED){
48 n_installed_dependents++;
53 /* if caller requested the set of installed dependents */
56 abstract_pkg_t **dependents = xcalloc((n_installed_dependents+1), sizeof(abstract_pkg_t *));
58 *pdependents = dependents;
59 for (i = 0; i < nprovides; i++) {
60 abstract_pkg_t *providee = provides[i];
61 abstract_pkg_t **dependers = providee->depended_upon_by;
62 abstract_pkg_t *dep_ab_pkg;
63 if (dependers == NULL)
65 while ((dep_ab_pkg = *dependers++) != NULL) {
66 if (dep_ab_pkg->state_status == SS_INSTALLED && !(dep_ab_pkg->state_flag & SF_MARKED)) {
67 dependents[p++] = dep_ab_pkg;
68 dep_ab_pkg->state_flag |= SF_MARKED;
73 /* now clear the marks */
74 for (i = 0; i < p; i++) {
75 abstract_pkg_t *dep_ab_pkg = dependents[i];
76 dep_ab_pkg->state_flag &= ~SF_MARKED;
79 return n_installed_dependents;
83 opkg_remove_dependent_pkgs(pkg_t *pkg, abstract_pkg_t **dependents)
88 pkg_vec_t *dependent_pkgs;
89 abstract_pkg_t * ab_pkg;
91 if((ab_pkg = pkg->parent) == NULL){
92 opkg_msg(ERROR, "Internal error: pkg %s isn't in hash table\n",
97 if (dependents == NULL)
100 // here i am using the dependencies_checked
101 if (ab_pkg->dependencies_checked == 2) // variable to make out whether this package
102 return 0; // has already been encountered in the process
103 // of marking packages for removal - Karthik
104 ab_pkg->dependencies_checked = 2;
108 dependent_pkgs = pkg_vec_alloc();
110 while (dependents [i] != NULL) {
111 abstract_pkg_t *dep_ab_pkg = dependents[i];
113 if (dep_ab_pkg->dependencies_checked == 2){
117 if (dep_ab_pkg->state_status == SS_INSTALLED) {
118 for (a = 0; a < dep_ab_pkg->pkgs->len; a++) {
119 pkg_t *dep_pkg = dep_ab_pkg->pkgs->pkgs[a];
120 if (dep_pkg->state_status == SS_INSTALLED) {
121 pkg_vec_insert(dependent_pkgs, dep_pkg);
127 /* 1 - to keep track of visited ab_pkgs when checking for possiblility of a broken removal of pkgs.
128 * 2 - to keep track of pkgs whose deps have been checked alrdy - Karthik */
132 pkg_vec_free(dependent_pkgs);
138 for (i = 0; i < dependent_pkgs->len; i++) {
139 err = opkg_remove_pkg(dependent_pkgs->pkgs[i],0);
141 pkg_vec_free(dependent_pkgs);
145 pkg_vec_free(dependent_pkgs);
150 print_dependents_warning(pkg_t *pkg, abstract_pkg_t **dependents)
152 abstract_pkg_t *dep_ab_pkg;
153 opkg_msg(ERROR, "Package %s is depended upon by packages:\n", pkg->name);
154 while ((dep_ab_pkg = *dependents++) != NULL) {
155 if (dep_ab_pkg->state_status == SS_INSTALLED)
156 opkg_msg(ERROR, "\t%s\n", dep_ab_pkg->name);
158 opkg_msg(ERROR, "These might cease to work if package %s is removed.\n\n",
160 opkg_msg(ERROR, "Force removal of this package with --force-depends.\n");
161 opkg_msg(ERROR, "Force removal of this package and its dependents\n");
162 opkg_msg(ERROR, "with --force-removal-of-dependent-packages.\n");
166 * Find and remove packages that were autoinstalled and are orphaned
167 * by the removal of pkg.
170 remove_autoinstalled(pkg_t *pkg)
175 struct compound_depend *cdep;
176 abstract_pkg_t **dependents;
178 int count = pkg->pre_depends_count +
180 pkg->recommends_count +
183 for (i=0; i<count; i++) {
184 cdep = &pkg->depends[i];
185 if (cdep->type != PREDEPEND
186 && cdep->type != DEPEND
187 && cdep->type != RECOMMEND)
189 for (j=0; j<cdep->possibility_count; j++) {
190 p = pkg_hash_fetch_installed_by_name(
191 cdep->possibilities[j]->pkg->name);
193 /* If the package is not installed, this could have
194 * been a circular dependency and the package has
195 * already been removed.
200 if (!p->auto_installed)
203 n_deps = pkg_has_installed_dependents(p, &dependents);
205 opkg_msg(NOTICE, "%s was autoinstalled and is "
206 "now orphaned, removing.\n",
208 opkg_remove_pkg(p, 0);
210 opkg_msg(INFO, "%s was autoinstalled and is "
211 "still required by %d "
212 "installed packages.\n",
224 opkg_remove_pkg(pkg_t *pkg, int from_upgrade)
227 abstract_pkg_t *parent_pkg = NULL;
230 * If called from an upgrade and not from a normal remove,
231 * ignore the essential flag.
233 if (pkg->essential && !from_upgrade) {
234 if (conf->force_removal_of_essential_packages) {
236 "Removing essential package %s under your coercion.\n"
237 "\tIf your system breaks, you get to keep both pieces\n",
240 opkg_msg(NOTICE, "Refusing to remove essential package %s.\n"
241 "\tRemoving an essential package may lead to an unusable system, but if\n"
242 "\tyou enjoy that kind of pain, you can force opkg to proceed against\n"
243 "\tits will with the option: --force-removal-of-essential-packages\n",
249 if ((parent_pkg = pkg->parent) == NULL)
252 /* only attempt to remove dependent installed packages if
253 * force_depends is not specified or the package is being
256 if (!conf->force_depends
257 && !(pkg->state_flag & SF_REPLACE)) {
258 abstract_pkg_t **dependents;
259 int has_installed_dependents =
260 pkg_has_installed_dependents(pkg, &dependents);
262 if (has_installed_dependents) {
264 * if this package is depended upon by others, then either we should
265 * not remove it or we should remove it and all of its dependents
268 if (!conf->force_removal_of_dependent_packages) {
269 print_dependents_warning(pkg, dependents);
274 /* remove packages depending on this package - Karthik */
275 err = opkg_remove_dependent_pkgs(pkg, dependents);
285 if (from_upgrade == 0) {
286 opkg_msg(NOTICE, "Removing package %s from %s...\n",
287 pkg->name, pkg->dest->name);
289 pkg->state_flag |= SF_FILELIST_CHANGED;
291 pkg->state_want = SW_DEINSTALL;
292 opkg_state_changed++;
294 pkg_run_script(pkg, "prerm", "remove");
296 /* DPKG_INCOMPATIBILITY: dpkg is slightly different here. It
297 maintains an empty filelist rather than deleting it. That seems
298 like a big pain, and I don't see that that should make a big
299 difference, but for anyone who wants tighter compatibility,
300 feel free to fix this. */
301 remove_data_files_and_list(pkg);
303 pkg_run_script(pkg, "postrm", "remove");
305 remove_maintainer_scripts(pkg);
306 pkg->state_status = SS_NOT_INSTALLED;
309 parent_pkg->state_status = SS_NOT_INSTALLED;
311 /* remove autoinstalled packages that are orphaned by the removal of this one */
312 if (conf->autoremove)
313 remove_autoinstalled(pkg);
319 remove_data_files_and_list(pkg_t *pkg)
321 str_list_t installed_dirs;
322 str_list_t *installed_files;
323 str_list_elt_t *iter;
325 conffile_t *conffile;
330 installed_files = pkg_get_installed_files(pkg);
331 if (installed_files == NULL) {
332 opkg_msg(ERROR, "Failed to determine installed "
333 "files for %s. None removed.\n", pkg->name);
337 str_list_init(&installed_dirs);
339 /* don't include trailing slash */
340 if (conf->offline_root)
341 rootdirlen = strlen(conf->offline_root);
343 for (iter = str_list_first(installed_files); iter; iter = str_list_next(installed_files, iter)) {
344 file_name = (char *)iter->data;
346 owner = file_hash_get_file_owner(file_name);
348 /* File may have been claimed by another package. */
351 if (file_is_dir(file_name)) {
352 str_list_append(&installed_dirs, file_name);
356 conffile = pkg_get_conffile(pkg, file_name+rootdirlen);
358 if (conffile_has_been_modified(conffile)) {
359 opkg_msg(NOTICE, "Not deleting modified conffile %s.\n",
365 if (!conf->noaction) {
366 opkg_msg(INFO, "Deleting %s.\n", file_name, conf->noaction);
369 opkg_msg(INFO, "Not deleting %s. (noaction)\n",
372 file_hash_remove(file_name);
375 /* Remove empty directories */
376 if (!conf->noaction) {
379 for (iter = str_list_first(&installed_dirs); iter; iter = str_list_next(&installed_dirs, iter)) {
380 file_name = (char *)iter->data;
382 if (rmdir(file_name) == 0) {
383 opkg_msg(INFO, "Deleting %s.\n", file_name);
385 str_list_remove(&installed_dirs, &iter);
388 } while (removed_a_dir);
391 pkg_free_installed_files(pkg);
392 pkg_remove_installed_files_list(pkg);
394 /* Don't print warning for dirs that are provided by other packages */
395 for (iter = str_list_first(&installed_dirs); iter; iter = str_list_next(&installed_dirs, iter)) {
396 file_name = (char *)iter->data;
398 owner = file_hash_get_file_owner(file_name);
402 str_list_remove(&installed_dirs, &iter);
407 while (!void_list_empty(&installed_dirs)) {
408 iter = str_list_pop(&installed_dirs);
412 str_list_deinit(&installed_dirs);
416 remove_maintainer_scripts(pkg_t *pkg)
425 sprintf_alloc(&globpattern, "%s/%s.*",
426 pkg->dest->info_dir, pkg->name);
428 err = glob(globpattern, 0, NULL, &globbuf);
433 for (i = 0; i < globbuf.gl_pathc; i++) {
434 opkg_msg(INFO, "Deleting %s.\n", globbuf.gl_pathv[i]);
435 unlink(globbuf.gl_pathv[i]);