diff options
Diffstat (limited to 'ipkg_remove.c')
| -rw-r--r-- | ipkg_remove.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/ipkg_remove.c b/ipkg_remove.c new file mode 100644 index 0000000..5d9cec9 --- /dev/null +++ b/ipkg_remove.c @@ -0,0 +1,383 @@ +/* ipkg_remove.c - the itsy package management system + + Carl D. Worth + + Copyright (C) 2001 University of Southern California + + This program is free software; you can redistribute it and/or + modify it under the terms of the GNU General Public License as + published by the Free Software Foundation; either version 2, or (at + your option) any later version. + + This program is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + General Public License for more details. +*/ + +#include "ipkg.h" +#include "ipkg_message.h" + +#include <glob.h> + +#include "ipkg_remove.h" + +#include "file_util.h" +#include "sprintf_alloc.h" +#include "str_util.h" + +#include "ipkg_cmd.h" + +/* + * Returns number of the number of packages depending on the packages provided by this package. + * Every package implicitly provides itself. + */ +int pkg_has_installed_dependents(ipkg_conf_t *conf, abstract_pkg_t *parent_apkg, pkg_t *pkg, abstract_pkg_t *** pdependents) +{ + int nprovides = pkg->provides_count; + abstract_pkg_t **provides = pkg->provides; + int n_installed_dependents = 0; + int i; + for (i = 0; i <= nprovides; i++) { + abstract_pkg_t *providee = provides[i]; + abstract_pkg_t **dependers = providee->depended_upon_by; + abstract_pkg_t *dep_ab_pkg; + if (dependers == NULL) + continue; + while ((dep_ab_pkg = *dependers++) != NULL) { + if (dep_ab_pkg->state_status == SS_INSTALLED){ + n_installed_dependents++; + } + } + + } + /* if caller requested the set of installed dependents */ + if (pdependents) { + int p = 0; + abstract_pkg_t **dependents = (abstract_pkg_t **)malloc((n_installed_dependents+1)*sizeof(abstract_pkg_t *)); + + if ( dependents == NULL ){ + fprintf(stderr,"%s Unable to allocate memory. REPORT THIS BUG IN BUGZILLA PLEASE\n", __FUNCTION__); + return -1; + } + + *pdependents = dependents; + for (i = 0; i <= nprovides; i++) { + abstract_pkg_t *providee = provides[i]; + abstract_pkg_t **dependers = providee->depended_upon_by; + abstract_pkg_t *dep_ab_pkg; + if (dependers == NULL) + continue; + while ((dep_ab_pkg = *dependers++) != NULL) { + if (dep_ab_pkg->state_status == SS_INSTALLED && !(dep_ab_pkg->state_flag & SF_MARKED)) { + dependents[p++] = dep_ab_pkg; + dep_ab_pkg->state_flag |= SF_MARKED; + } + } + } + dependents[p] = NULL; + /* now clear the marks */ + for (i = 0; i < p; i++) { + abstract_pkg_t *dep_ab_pkg = dependents[i]; + dep_ab_pkg->state_flag &= ~SF_MARKED; + } + } + return n_installed_dependents; +} + +int ipkg_remove_dependent_pkgs (ipkg_conf_t *conf, pkg_t *pkg, abstract_pkg_t **dependents) +{ + int i; + int a; + int count; + pkg_vec_t *dependent_pkgs = pkg_vec_alloc(); + abstract_pkg_t * ab_pkg; + + if((ab_pkg = pkg->parent) == NULL){ + fprintf(stderr, "%s: unable to get dependent pkgs. pkg %s isn't in hash table\n", + __FUNCTION__, pkg->name); + return 0; + } + + if (dependents == NULL) + return 0; + + // here i am using the dependencies_checked + if (ab_pkg->dependencies_checked == 2) // variable to make out whether this package + return 0; // has already been encountered in the process + // of marking packages for removal - Karthik + ab_pkg->dependencies_checked = 2; + + i = 0; + count = 1; + while (dependents [i] != NULL) { + abstract_pkg_t *dep_ab_pkg = dependents[i]; + + if (dep_ab_pkg->dependencies_checked == 2){ + i++; + continue; + } + if (dep_ab_pkg->state_status == SS_INSTALLED) { + for (a = 0; a < dep_ab_pkg->pkgs->len; a++) { + pkg_t *dep_pkg = dep_ab_pkg->pkgs->pkgs[a]; + if (dep_pkg->state_status == SS_INSTALLED) { + pkg_vec_insert(dependent_pkgs, dep_pkg); + count++; + } + } + } + i++; + /* 1 - to keep track of visited ab_pkgs when checking for possiblility of a broken removal of pkgs. + * 2 - to keep track of pkgs whose deps have been checked alrdy - Karthik */ + } + + if (count == 1) + return 0; + + + for (i = 0; i < dependent_pkgs->len; i++) { + int err = ipkg_remove_pkg(conf, dependent_pkgs->pkgs[i],0); + if (err) + return err; + } + return 0; +} + +static int user_prefers_removing_dependents(ipkg_conf_t *conf, abstract_pkg_t *abpkg, pkg_t *pkg, abstract_pkg_t **dependents) +{ + abstract_pkg_t *dep_ab_pkg; + ipkg_message(conf, IPKG_ERROR, "Package %s is depended upon by packages:\n", pkg->name); + while ((dep_ab_pkg = *dependents++) != NULL) { + if (dep_ab_pkg->state_status == SS_INSTALLED) + ipkg_message(conf, IPKG_ERROR, "\t%s\n", dep_ab_pkg->name); + } + ipkg_message(conf, IPKG_ERROR, "These might cease to work if package %s is removed.\n\n", pkg->name); + ipkg_message(conf, IPKG_ERROR, ""); + ipkg_message(conf, IPKG_ERROR, "You can force removal of this package with -force-depends.\n"); + ipkg_message(conf, IPKG_ERROR, "You can force removal of this package and its dependents\n"); + ipkg_message(conf, IPKG_ERROR, "with -force-removal-of-dependent-packages or -recursive\n"); + ipkg_message(conf, IPKG_ERROR, "or by setting option force_removal_of_dependent_packages\n"); + ipkg_message(conf, IPKG_ERROR, "in ipkg.conf.\n"); + return 0; +} + +int ipkg_remove_pkg(ipkg_conf_t *conf, pkg_t *pkg,int message) +{ +/* Actually, when "message == 1" I have been called from an upgrade, and not from a normal remove + thus I wan't check for essential, as I'm upgrading. + I hope it won't break anything :) +*/ + int err; + abstract_pkg_t *parent_pkg = NULL; + + if (pkg->essential && !message) { + if (conf->force_removal_of_essential_packages) { + fprintf(stderr, "WARNING: Removing essential package %s under your coercion.\n" + "\tIf your system breaks, you get to keep both pieces\n", + pkg->name); + } else { + fprintf(stderr, "ERROR: Refusing to remove essential package %s.\n" + "\tRemoving an essential package may lead to an unusable system, but if\n" + "\tyou enjoy that kind of pain, you can force ipkg to proceed against\n" + "\tits will with the option: -force-removal-of-essential-packages\n", + pkg->name); + return IPKG_PKG_IS_ESSENTIAL; + } + } + + if ((parent_pkg = pkg->parent) == NULL) + return 0; + + /* only attempt to remove dependent installed packages if + * force_depends is not specified or the package is being + * replaced. + */ + if (!conf->force_depends + && !(pkg->state_flag & SF_REPLACE)) { + abstract_pkg_t **dependents; + int has_installed_dependents = + pkg_has_installed_dependents(conf, parent_pkg, pkg, &dependents); + + if (has_installed_dependents) { + /* + * if this package is depended up by others, then either we should + * not remove it or we should remove it and all of its dependents + */ + + if (!conf->force_removal_of_dependent_packages + && !user_prefers_removing_dependents(conf, parent_pkg, pkg, dependents)) { + return IPKG_PKG_HAS_DEPENDENTS; + } + + /* remove packages depending on this package - Karthik */ + err = ipkg_remove_dependent_pkgs (conf, pkg, dependents); + free(dependents); + if (err) return err; + } + } + + if ( message==0 ){ + printf("Removing package %s from %s...\n", pkg->name, pkg->dest->name); + fflush(stdout); + } + pkg->state_flag |= SF_FILELIST_CHANGED; + + pkg->state_want = SW_DEINSTALL; + ipkg_state_changed++; + + pkg_run_script(conf, pkg, "prerm", "remove"); + + /* DPKG_INCOMPATIBILITY: dpkg is slightly different here. It + maintains an empty filelist rather than deleting it. That seems + like a big pain, and I don't see that that should make a big + difference, but for anyone who wants tighter compatibility, + feel free to fix this. */ + remove_data_files_and_list(conf, pkg); + + pkg_run_script(conf, pkg, "postrm", "remove"); + + remove_maintainer_scripts_except_postrm(conf, pkg); + + /* Aman Gupta - Since ipkg is made for handheld devices with limited + * space, it doesn't make sense to leave extra configurations, files, + * and maintainer scripts left around. So, we make remove like purge, + * and take out all the crap :) */ + + remove_postrm(conf, pkg); + pkg->state_status = SS_NOT_INSTALLED; + + if (parent_pkg) + parent_pkg->state_status = SS_NOT_INSTALLED; + + return 0; +} + +int ipkg_purge_pkg(ipkg_conf_t *conf, pkg_t *pkg) +{ + ipkg_remove_pkg(conf, pkg,0); + return 0; +} + +int remove_data_files_and_list(ipkg_conf_t *conf, pkg_t *pkg) +{ + str_list_t installed_dirs; + str_list_t *installed_files; + str_list_elt_t *iter; + char *file_name; + conffile_t *conffile; + int removed_a_dir; + pkg_t *owner; + + str_list_init(&installed_dirs); + installed_files = pkg_get_installed_files(pkg); + + for (iter = installed_files->head; iter; iter = iter->next) { + file_name = iter->data; + + if (file_is_dir(file_name)) { + str_list_append(&installed_dirs, strdup(file_name)); + continue; + } + + conffile = pkg_get_conffile(pkg, file_name); + if (conffile) { + /* XXX: QUESTION: Is this right? I figure we only need to + save the conffile if it has been modified. Is that what + dpkg does? Or does dpkg preserve all conffiles? If so, + this seems like a better thing to do to conserve + space. */ + if (conffile_has_been_modified(conf, conffile)) { + printf(" not deleting modified conffile %s\n", file_name); + fflush(stdout); + continue; + } + } + + ipkg_message(conf, IPKG_INFO, " deleting %s (noaction=%d)\n", file_name, conf->noaction); + if (!conf->noaction) + unlink(file_name); + } + + if (!conf->noaction) { + do { + removed_a_dir = 0; + for (iter = installed_dirs.head; iter; iter = iter->next) { + file_name = iter->data; + + if (rmdir(file_name) == 0) { + ipkg_message(conf, IPKG_INFO, " deleting %s\n", file_name); + removed_a_dir = 1; + str_list_remove(&installed_dirs, &iter); + } + } + } while (removed_a_dir); + } + + pkg_free_installed_files(pkg); + /* We have to remove the file list now, so that + find_pkg_owning_file does not always just report this package */ + pkg_remove_installed_files_list(conf, pkg); + + /* Don't print warning for dirs that are provided by other packages */ + for (iter = installed_dirs.head; iter; iter = iter->next) { + file_name = iter->data; + + owner = file_hash_get_file_owner(conf, file_name); + if (owner) { + free(iter->data); + iter->data = NULL; + str_list_remove(&installed_dirs, &iter); + } + } + + /* cleanup */ + for (iter = installed_dirs.head; iter; iter = iter->next) { + free(iter->data); + iter->data = NULL; + } + str_list_deinit(&installed_dirs); + + return 0; +} + +int remove_maintainer_scripts_except_postrm(ipkg_conf_t *conf, pkg_t *pkg) +{ + int i, err; + char *globpattern; + glob_t globbuf; + + if (conf->noaction) return 0; + + sprintf_alloc(&globpattern, "%s/%s.*", + pkg->dest->info_dir, pkg->name); + err = glob(globpattern, 0, NULL, &globbuf); + free(globpattern); + if (err) { + return 0; + } + + for (i = 0; i < globbuf.gl_pathc; i++) { + if (str_ends_with(globbuf.gl_pathv[i], ".postrm")) { + continue; + } + ipkg_message(conf, IPKG_INFO, " deleting %s\n", globbuf.gl_pathv[i]); + unlink(globbuf.gl_pathv[i]); + } + globfree(&globbuf); + + return 0; +} + +int remove_postrm(ipkg_conf_t *conf, pkg_t *pkg) +{ + char *postrm_file_name; + + if (conf->noaction) return 0; + + sprintf_alloc(&postrm_file_name, "%s/%s.postrm", + pkg->dest->info_dir, pkg->name); + unlink(postrm_file_name); + free(postrm_file_name); + + return 0; +} |