1 /* opkg_remove.c - the itsy 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.
19 #include "opkg_message.h"
23 #include "opkg_remove.h"
25 #include "file_util.h"
26 #include "sprintf_alloc.h"
32 * Returns number of the number of packages depending on the packages provided by this package.
33 * Every package implicitly provides itself.
35 int pkg_has_installed_dependents(opkg_conf_t *conf, abstract_pkg_t *parent_apkg, pkg_t *pkg, abstract_pkg_t *** pdependents)
37 int nprovides = pkg->provides_count;
38 abstract_pkg_t **provides = pkg->provides;
39 int n_installed_dependents = 0;
41 for (i = 0; i <= nprovides; i++) {
42 abstract_pkg_t *providee = provides[i];
43 abstract_pkg_t **dependers = providee->depended_upon_by;
44 abstract_pkg_t *dep_ab_pkg;
45 if (dependers == NULL)
47 while ((dep_ab_pkg = *dependers++) != NULL) {
48 if (dep_ab_pkg->state_status == SS_INSTALLED){
49 n_installed_dependents++;
54 /* if caller requested the set of installed dependents */
57 abstract_pkg_t **dependents = (abstract_pkg_t **)malloc((n_installed_dependents+1)*sizeof(abstract_pkg_t *));
59 if ( dependents == NULL ){
60 fprintf(stderr,"%s Unable to allocate memory. REPORT THIS BUG IN BUGZILLA PLEASE\n", __FUNCTION__);
64 *pdependents = dependents;
65 for (i = 0; i <= nprovides; i++) {
66 abstract_pkg_t *providee = provides[i];
67 abstract_pkg_t **dependers = providee->depended_upon_by;
68 abstract_pkg_t *dep_ab_pkg;
69 if (dependers == NULL)
71 while ((dep_ab_pkg = *dependers++) != NULL) {
72 if (dep_ab_pkg->state_status == SS_INSTALLED && !(dep_ab_pkg->state_flag & SF_MARKED)) {
73 dependents[p++] = dep_ab_pkg;
74 dep_ab_pkg->state_flag |= SF_MARKED;
79 /* now clear the marks */
80 for (i = 0; i < p; i++) {
81 abstract_pkg_t *dep_ab_pkg = dependents[i];
82 dep_ab_pkg->state_flag &= ~SF_MARKED;
85 return n_installed_dependents;
88 int opkg_remove_dependent_pkgs (opkg_conf_t *conf, pkg_t *pkg, abstract_pkg_t **dependents)
93 pkg_vec_t *dependent_pkgs = pkg_vec_alloc();
94 abstract_pkg_t * ab_pkg;
96 if((ab_pkg = pkg->parent) == NULL){
97 fprintf(stderr, "%s: unable to get dependent pkgs. pkg %s isn't in hash table\n",
98 __FUNCTION__, pkg->name);
102 if (dependents == NULL)
105 // here i am using the dependencies_checked
106 if (ab_pkg->dependencies_checked == 2) // variable to make out whether this package
107 return 0; // has already been encountered in the process
108 // of marking packages for removal - Karthik
109 ab_pkg->dependencies_checked = 2;
113 while (dependents [i] != NULL) {
114 abstract_pkg_t *dep_ab_pkg = dependents[i];
116 if (dep_ab_pkg->dependencies_checked == 2){
120 if (dep_ab_pkg->state_status == SS_INSTALLED) {
121 for (a = 0; a < dep_ab_pkg->pkgs->len; a++) {
122 pkg_t *dep_pkg = dep_ab_pkg->pkgs->pkgs[a];
123 if (dep_pkg->state_status == SS_INSTALLED) {
124 pkg_vec_insert(dependent_pkgs, dep_pkg);
130 /* 1 - to keep track of visited ab_pkgs when checking for possiblility of a broken removal of pkgs.
131 * 2 - to keep track of pkgs whose deps have been checked alrdy - Karthik */
138 for (i = 0; i < dependent_pkgs->len; i++) {
139 int err = opkg_remove_pkg(conf, dependent_pkgs->pkgs[i],0);
146 static int user_prefers_removing_dependents(opkg_conf_t *conf, abstract_pkg_t *abpkg, pkg_t *pkg, abstract_pkg_t **dependents)
148 abstract_pkg_t *dep_ab_pkg;
149 opkg_message(conf, OPKG_ERROR, "Package %s is depended upon by packages:\n", pkg->name);
150 while ((dep_ab_pkg = *dependents++) != NULL) {
151 if (dep_ab_pkg->state_status == SS_INSTALLED)
152 opkg_message(conf, OPKG_ERROR, "\t%s\n", dep_ab_pkg->name);
154 opkg_message(conf, OPKG_ERROR, "These might cease to work if package %s is removed.\n\n", pkg->name);
155 opkg_message(conf, OPKG_ERROR, "");
156 opkg_message(conf, OPKG_ERROR, "You can force removal of this package with -force-depends.\n");
157 opkg_message(conf, OPKG_ERROR, "You can force removal of this package and its dependents\n");
158 opkg_message(conf, OPKG_ERROR, "with -force-removal-of-dependent-packages or -recursive\n");
159 opkg_message(conf, OPKG_ERROR, "or by setting option force_removal_of_dependent_packages\n");
160 opkg_message(conf, OPKG_ERROR, "in opkg.conf.\n");
164 static int remove_autoinstalled (opkg_conf_t *conf, pkg_t *pkg)
167 * find and remove packages that were autoinstalled and are orphaned by the removal of pkg
170 char *buffer, *d_str;
173 for (i = 0; i < pkg->depends_count; ++i)
177 d_str = pkg->depends_str[i];
178 buffer = malloc (strlen (d_str) + 1);
181 fprintf(stderr,"%s Unable to allocate memory.\n", __FUNCTION__);
185 while (d_str[x] != '\0' && d_str[x] != ' ')
187 buffer[x] = d_str[x];
191 buffer = realloc (buffer, strlen (buffer) + 1);
192 p = pkg_hash_fetch_installed_by_name (&conf->pkg_hash, buffer);
194 /* if the package is not installed, this could have been a circular
195 * depenancy and the package has already been removed */
199 if (p->auto_installed)
202 abstract_pkg_t **dependents;
204 deps = pkg_has_installed_dependents(conf, NULL, p, &dependents);
207 printf ("%s was autoinstalled but is now orphaned\n", buffer);
208 opkg_remove_pkg(conf, p,0);
211 printf ("%s was autoinstalled and is still required by %d installed packages\n", buffer, deps);
219 int opkg_remove_pkg(opkg_conf_t *conf, pkg_t *pkg,int message)
221 /* Actually, when "message == 1" I have been called from an upgrade, and not from a normal remove
222 thus I wan't check for essential, as I'm upgrading.
223 I hope it won't break anything :)
226 abstract_pkg_t *parent_pkg = NULL;
228 if (pkg->essential && !message) {
229 if (conf->force_removal_of_essential_packages) {
230 fprintf(stderr, "WARNING: Removing essential package %s under your coercion.\n"
231 "\tIf your system breaks, you get to keep both pieces\n",
234 fprintf(stderr, "ERROR: Refusing to remove essential package %s.\n"
235 "\tRemoving an essential package may lead to an unusable system, but if\n"
236 "\tyou enjoy that kind of pain, you can force opkg to proceed against\n"
237 "\tits will with the option: -force-removal-of-essential-packages\n",
239 return OPKG_PKG_IS_ESSENTIAL;
243 if ((parent_pkg = pkg->parent) == NULL)
246 /* only attempt to remove dependent installed packages if
247 * force_depends is not specified or the package is being
250 if (!conf->force_depends
251 && !(pkg->state_flag & SF_REPLACE)) {
252 abstract_pkg_t **dependents;
253 int has_installed_dependents =
254 pkg_has_installed_dependents(conf, parent_pkg, pkg, &dependents);
256 if (has_installed_dependents) {
258 * if this package is depended up by others, then either we should
259 * not remove it or we should remove it and all of its dependents
262 if (!conf->force_removal_of_dependent_packages
263 && !user_prefers_removing_dependents(conf, parent_pkg, pkg, dependents)) {
264 return OPKG_PKG_HAS_DEPENDENTS;
267 /* remove packages depending on this package - Karthik */
268 err = opkg_remove_dependent_pkgs (conf, pkg, dependents);
275 printf("Removing package %s from %s...\n", pkg->name, pkg->dest->name);
278 pkg->state_flag |= SF_FILELIST_CHANGED;
280 pkg->state_want = SW_DEINSTALL;
281 opkg_state_changed++;
283 pkg_run_script(conf, pkg, "prerm", "remove");
285 /* DPKG_INCOMPATIBILITY: dpkg is slightly different here. It
286 maintains an empty filelist rather than deleting it. That seems
287 like a big pain, and I don't see that that should make a big
288 difference, but for anyone who wants tighter compatibility,
289 feel free to fix this. */
290 remove_data_files_and_list(conf, pkg);
292 pkg_run_script(conf, pkg, "postrm", "remove");
294 remove_maintainer_scripts_except_postrm(conf, pkg);
296 /* Aman Gupta - Since opkg is made for handheld devices with limited
297 * space, it doesn't make sense to leave extra configurations, files,
298 * and maintainer scripts left around. So, we make remove like purge,
299 * and take out all the crap :) */
301 remove_postrm(conf, pkg);
302 pkg->state_status = SS_NOT_INSTALLED;
305 parent_pkg->state_status = SS_NOT_INSTALLED;
308 /* remove autoinstalled packages that are orphaned by the removal of this one */
309 if (conf->autoremove)
310 remove_autoinstalled (conf, pkg);
317 int opkg_purge_pkg(opkg_conf_t *conf, pkg_t *pkg)
319 opkg_remove_pkg(conf, pkg,0);
323 int remove_data_files_and_list(opkg_conf_t *conf, pkg_t *pkg)
325 str_list_t installed_dirs;
326 str_list_t *installed_files;
327 str_list_elt_t *iter;
329 conffile_t *conffile;
333 str_list_init(&installed_dirs);
334 installed_files = pkg_get_installed_files(pkg);
336 for (iter = installed_files->head; iter; iter = iter->next) {
337 file_name = iter->data;
339 if (file_is_dir(file_name)) {
340 str_list_append(&installed_dirs, strdup(file_name));
344 conffile = pkg_get_conffile(pkg, file_name);
346 /* XXX: QUESTION: Is this right? I figure we only need to
347 save the conffile if it has been modified. Is that what
348 dpkg does? Or does dpkg preserve all conffiles? If so,
349 this seems like a better thing to do to conserve
351 if (conffile_has_been_modified(conf, conffile)) {
352 printf(" not deleting modified conffile %s\n", file_name);
358 opkg_message(conf, OPKG_INFO, " deleting %s (noaction=%d)\n", file_name, conf->noaction);
363 if (!conf->noaction) {
366 for (iter = installed_dirs.head; iter; iter = iter->next) {
367 file_name = iter->data;
369 if (rmdir(file_name) == 0) {
370 opkg_message(conf, OPKG_INFO, " deleting %s\n", file_name);
372 str_list_remove(&installed_dirs, &iter);
375 } while (removed_a_dir);
378 pkg_free_installed_files(pkg);
379 /* We have to remove the file list now, so that
380 find_pkg_owning_file does not always just report this package */
381 pkg_remove_installed_files_list(conf, pkg);
383 /* Don't print warning for dirs that are provided by other packages */
384 for (iter = installed_dirs.head; iter; iter = iter->next) {
385 file_name = iter->data;
387 owner = file_hash_get_file_owner(conf, file_name);
391 str_list_remove(&installed_dirs, &iter);
396 for (iter = installed_dirs.head; iter; iter = iter->next) {
400 str_list_deinit(&installed_dirs);
405 int remove_maintainer_scripts_except_postrm(opkg_conf_t *conf, pkg_t *pkg)
411 if (conf->noaction) return 0;
413 sprintf_alloc(&globpattern, "%s/%s.*",
414 pkg->dest->info_dir, pkg->name);
415 err = glob(globpattern, 0, NULL, &globbuf);
421 for (i = 0; i < globbuf.gl_pathc; i++) {
422 if (str_ends_with(globbuf.gl_pathv[i], ".postrm")) {
425 opkg_message(conf, OPKG_INFO, " deleting %s\n", globbuf.gl_pathv[i]);
426 unlink(globbuf.gl_pathv[i]);
433 int remove_postrm(opkg_conf_t *conf, pkg_t *pkg)
435 char *postrm_file_name;
437 if (conf->noaction) return 0;
439 sprintf_alloc(&postrm_file_name, "%s/%s.postrm",
440 pkg->dest->info_dir, pkg->name);
441 unlink(postrm_file_name);
442 free(postrm_file_name);