/* * dpkg - main program for package management * remove.c - functionality for removing packages * * Copyright © 1995 Ian Jackson * * This 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 of the License, or * (at your option) any later version. * * This 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. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "infodb.h" #include "filesdb.h" #include "main.h" /* * pkgdepcheck may be a virtual pkg. */ static void checkforremoval(struct pkginfo *pkgtoremove, struct pkginfo *pkgdepcheck, int *rokp, struct varbuf *raemsgs) { struct deppossi *possi; struct pkginfo *depender; int before, ok; for (possi = pkgdepcheck->installed.depended; possi; possi = possi->rev_next) { if (possi->up->type != dep_depends && possi->up->type != dep_predepends) continue; depender= possi->up->up; debug(dbg_depcon,"checking depending package `%s'",depender->name); if (!(depender->status == stat_installed || depender->status == stat_triggerspending || depender->status == stat_triggersawaited)) continue; if (ignore_depends(depender)) { debug(dbg_depcon, "ignoring depending package '%s'", depender->name); continue; } if (dependtry > 1) { if (findbreakcycle(pkgtoremove)) sincenothing= 0; } before= raemsgs->used; ok= dependencies_ok(depender,pkgtoremove,raemsgs); if (ok == 0 && depender->clientdata->istobe == itb_remove) ok= 1; if (ok == 1) /* Don't burble about reasons for deferral. */ varbuf_trunc(raemsgs, before); if (ok < *rokp) *rokp= ok; } } void deferred_remove(struct pkginfo *pkg) { struct varbuf raemsgs = VARBUF_INIT; int rok; struct dependency *dep; debug(dbg_general,"deferred_remove package %s",pkg->name); if (pkg->status == stat_notinstalled) { warning(_("ignoring request to remove %.250s which isn't installed."), pkg->name); pkg->clientdata->istobe= itb_normal; return; } else if (!f_pending && pkg->status == stat_configfiles && cipaction->arg_int != act_purge) { warning(_("ignoring request to remove %.250s, only the config\n" " files of which are on the system. Use --purge to remove them too."), pkg->name); pkg->clientdata->istobe= itb_normal; return; } if (pkg->installed.essential && pkg->status != stat_configfiles) forcibleerr(fc_removeessential, _("This is an essential package -" " it should not be removed.")); if (!f_pending) pkg->want = (cipaction->arg_int == act_purge) ? want_purge : want_deinstall; if (!f_noact) modstatdb_note(pkg); debug(dbg_general,"checking dependencies for remove `%s'",pkg->name); rok= 2; checkforremoval(pkg,pkg,&rok,&raemsgs); for (dep= pkg->installed.depends; dep; dep= dep->next) { if (dep->type != dep_provides) continue; debug(dbg_depcon,"checking virtual package `%s'",dep->list->ed->name); checkforremoval(pkg,dep->list->ed,&rok,&raemsgs); } if (rok == 1) { varbuf_destroy(&raemsgs); pkg->clientdata->istobe= itb_remove; add_to_queue(pkg); return; } else if (rok == 0) { sincenothing= 0; varbuf_end_str(&raemsgs); fprintf(stderr, _("dpkg: dependency problems prevent removal of %s:\n%s"), pkg->name, raemsgs.buf); ohshit(_("dependency problems - not removing")); } else if (raemsgs.used) { varbuf_end_str(&raemsgs); fprintf(stderr, _("dpkg: %s: dependency problems, but removing anyway as you requested:\n%s"), pkg->name, raemsgs.buf); } varbuf_destroy(&raemsgs); sincenothing= 0; if (pkg->eflag & eflag_reinstreq) forcibleerr(fc_removereinstreq, _("Package is in a very bad inconsistent state - you should\n" " reinstall it before attempting a removal.")); ensure_allinstfiles_available(); filesdbinit(); if (f_noact) { printf(_("Would remove or purge %s ...\n"),pkg->name); pkg->status= stat_notinstalled; pkg->clientdata->istobe= itb_normal; return; } oldconffsetflags(pkg->installed.conffiles); printf(_("Removing %s ...\n"),pkg->name); log_action("remove", pkg); trig_activate_packageprocessing(pkg); if (pkg->status >= stat_halfconfigured) { static enum pkgstatus oldpkgstatus; oldpkgstatus= pkg->status; pkg->status= stat_halfconfigured; modstatdb_note(pkg); push_cleanup(cu_prermremove, ~ehflag_normaltidy, NULL, 0, 2, (void *)pkg, (void *)&oldpkgstatus); maintainer_script_installed(pkg, PRERMFILE, "pre-removal", "remove", NULL); /* Will turn into ‘half-installed’ soon ... */ pkg->status = stat_unpacked; } removal_bulk(pkg); } static void push_leftover(struct fileinlist **leftoverp, struct filenamenode *namenode) { struct fileinlist *newentry; newentry= nfmalloc(sizeof(struct fileinlist)); newentry->next= *leftoverp; newentry->namenode= namenode; *leftoverp= newentry; } static void removal_bulk_remove_file(const char *filename, const char *filetype) { /* We need the postrm and list files for --purge. */ if (strcmp(filetype, LISTFILE) == 0 || strcmp(filetype, POSTRMFILE) == 0) return; debug(dbg_stupidlyverbose, "removal_bulk info not postrm or list"); if (unlink(filename)) ohshite(_("unable to delete control info file `%.250s'"), filename); debug(dbg_scripts, "removal_bulk info unlinked %s", filename); } static void removal_bulk_remove_files(struct pkginfo *pkg) { int before; struct reversefilelistiter rlistit; struct fileinlist *leftover; struct filenamenode *namenode; static struct varbuf fnvb; struct stat stab; pkg->status= stat_halfinstalled; modstatdb_note(pkg); push_checkpoint(~ehflag_bombout, ehflag_normaltidy); reversefilelist_init(&rlistit,pkg->clientdata->files); leftover = NULL; while ((namenode= reversefilelist_next(&rlistit))) { struct filenamenode *usenode; debug(dbg_eachfile, "removal_bulk `%s' flags=%o", namenode->name, namenode->flags); if (namenode->flags & fnnf_old_conff) { push_leftover(&leftover,namenode); continue; } usenode = namenodetouse(namenode, pkg); trig_file_activate(usenode, pkg); varbuf_reset(&fnvb); varbuf_add_str(&fnvb, instdir); varbuf_add_str(&fnvb, usenode->name); before= fnvb.used; varbuf_add_str(&fnvb, DPKGTEMPEXT); varbuf_end_str(&fnvb); debug(dbg_eachfiledetail, "removal_bulk cleaning temp `%s'", fnvb.buf); ensure_pathname_nonexisting(fnvb.buf); varbuf_trunc(&fnvb, before); varbuf_add_str(&fnvb, DPKGNEWEXT); varbuf_end_str(&fnvb); debug(dbg_eachfiledetail, "removal_bulk cleaning new `%s'", fnvb.buf); ensure_pathname_nonexisting(fnvb.buf); varbuf_trunc(&fnvb, before); varbuf_end_str(&fnvb); if (!stat(fnvb.buf,&stab) && S_ISDIR(stab.st_mode)) { debug(dbg_eachfiledetail, "removal_bulk is a directory"); /* Only delete a directory or a link to one if we're the only * package which uses it. Other files should only be listed * in this package (but we don't check). */ if (dir_has_conffiles(namenode, pkg)) { push_leftover(&leftover,namenode); continue; } if (dir_is_used_by_pkg(namenode, pkg, leftover)) { push_leftover(&leftover, namenode); continue; } if (dir_is_used_by_others(namenode, pkg)) continue; } debug(dbg_eachfiledetail, "removal_bulk removing `%s'", fnvb.buf); if (!rmdir(fnvb.buf) || errno == ENOENT || errno == ELOOP) continue; if (errno == ENOTEMPTY || errno == EEXIST) { debug(dbg_eachfiledetail, "removal_bulk `%s' was not empty, will try again later", fnvb.buf); push_leftover(&leftover,namenode); continue; } else if (errno == EBUSY || errno == EPERM) { warning(_("while removing %.250s, unable to remove directory '%.250s': " "%s - directory may be a mount point?"), pkg->name, namenode->name, strerror(errno)); push_leftover(&leftover,namenode); continue; } else if (errno == EINVAL && strcmp(usenode->name, "/.") == 0) { debug(dbg_eachfiledetail, "removal_bulk '%s' root directory, cannot remove", fnvb.buf); push_leftover(&leftover, namenode); continue; } if (errno != ENOTDIR) ohshite(_("cannot remove `%.250s'"),fnvb.buf); debug(dbg_eachfiledetail, "removal_bulk unlinking `%s'", fnvb.buf); if (secure_unlink(fnvb.buf)) ohshite(_("unable to securely remove '%.250s'"), fnvb.buf); } write_filelist_except(pkg,leftover,0); maintainer_script_installed(pkg, POSTRMFILE, "post-removal", "remove", NULL); trig_parse_ci(pkgadminfile(pkg, TRIGGERSCIFILE), trig_cicb_interest_delete, NULL, pkg); trig_file_interests_save(); debug(dbg_general, "removal_bulk cleaning info directory"); pkg_infodb_foreach(pkg, removal_bulk_remove_file); dir_sync_path(pkgadmindir()); pkg->status= stat_configfiles; pkg->installed.essential = false; modstatdb_note(pkg); push_checkpoint(~ehflag_bombout, ehflag_normaltidy); } static void removal_bulk_remove_leftover_dirs(struct pkginfo *pkg) { struct reversefilelistiter rlistit; struct fileinlist *leftover; struct filenamenode *namenode; static struct varbuf fnvb; struct stat stab; /* We may have modified this previously. */ ensure_packagefiles_available(pkg); modstatdb_note(pkg); push_checkpoint(~ehflag_bombout, ehflag_normaltidy); reversefilelist_init(&rlistit,pkg->clientdata->files); leftover = NULL; while ((namenode= reversefilelist_next(&rlistit))) { struct filenamenode *usenode; debug(dbg_eachfile, "removal_bulk `%s' flags=%o", namenode->name, namenode->flags); if (namenode->flags & fnnf_old_conff) { /* This can only happen if removal_bulk_remove_configfiles() got * interrupted half way. */ debug(dbg_eachfiledetail, "removal_bulk expecting only left over dirs, " "ignoring conffile '%s'", namenode->name); continue; } usenode = namenodetouse(namenode, pkg); trig_file_activate(usenode, pkg); varbuf_reset(&fnvb); varbuf_add_str(&fnvb, instdir); varbuf_add_str(&fnvb, usenode->name); varbuf_end_str(&fnvb); if (!stat(fnvb.buf,&stab) && S_ISDIR(stab.st_mode)) { debug(dbg_eachfiledetail, "removal_bulk is a directory"); /* Only delete a directory or a link to one if we're the only * package which uses it. Other files should only be listed * in this package (but we don't check). */ if (dir_is_used_by_pkg(namenode, pkg, leftover)) { push_leftover(&leftover, namenode); continue; } if (dir_is_used_by_others(namenode, pkg)) continue; } debug(dbg_eachfiledetail, "removal_bulk removing `%s'", fnvb.buf); if (!rmdir(fnvb.buf) || errno == ENOENT || errno == ELOOP) continue; if (errno == ENOTEMPTY || errno == EEXIST) { warning(_("while removing %.250s, directory '%.250s' not empty so not removed."), pkg->name, namenode->name); push_leftover(&leftover,namenode); continue; } else if (errno == EBUSY || errno == EPERM) { warning(_("while removing %.250s, unable to remove directory '%.250s': " "%s - directory may be a mount point?"), pkg->name, namenode->name, strerror(errno)); push_leftover(&leftover,namenode); continue; } else if (errno == EINVAL && strcmp(usenode->name, "/.") == 0) { debug(dbg_eachfiledetail, "removal_bulk '%s' root directory, cannot remove", fnvb.buf); push_leftover(&leftover, namenode); continue; } if (errno != ENOTDIR) ohshite(_("cannot remove `%.250s'"),fnvb.buf); if (lstat(fnvb.buf, &stab) == 0 && S_ISLNK(stab.st_mode)) { debug(dbg_eachfiledetail, "removal_bulk is a symlink to a directory"); if (unlink(fnvb.buf)) ohshite(_("cannot remove '%.250s'"), fnvb.buf); continue; } push_leftover(&leftover,namenode); continue; } write_filelist_except(pkg,leftover,0); modstatdb_note(pkg); push_checkpoint(~ehflag_bombout, ehflag_normaltidy); } static void removal_bulk_remove_configfiles(struct pkginfo *pkg) { static const char *const removeconffexts[] = { REMOVECONFFEXTS, NULL }; int r, removevbbase; int conffnameused, conffbasenamelen; char *conffbasename; struct conffile *conff, **lconffp; struct fileinlist *searchfile; DIR *dsd; struct dirent *de; char *p; const char *const *ext; printf(_("Purging configuration files for %s ...\n"),pkg->name); log_action("purge", pkg); trig_activate_packageprocessing(pkg); /* We may have modified this above. */ ensure_packagefiles_available(pkg); /* We're about to remove the configuration, so remove the note * about which version it was ... */ blankversion(&pkg->configversion); modstatdb_note(pkg); /* Remove from our list any conffiles that aren't ours any more or * are involved in diversions, except if we are the package doing the * diverting. */ for (lconffp = &pkg->installed.conffiles; (conff = *lconffp) != NULL; ) { for (searchfile= pkg->clientdata->files; searchfile && strcmp(searchfile->namenode->name,conff->name); searchfile= searchfile->next); if (!searchfile) { debug(dbg_conff,"removal_bulk conffile not ours any more `%s'",conff->name); *lconffp= conff->next; } else if (searchfile->namenode->divert && (searchfile->namenode->divert->camefrom || (searchfile->namenode->divert->useinstead && searchfile->namenode->divert->pkg != pkg))) { debug(dbg_conff, "removal_bulk conffile '%s' ignored due to diversion", conff->name); *lconffp= conff->next; } else { debug(dbg_conffdetail,"removal_bulk set to new conffile `%s'",conff->name); conff->hash = NEWCONFFILEFLAG; lconffp= &conff->next; } } modstatdb_note(pkg); for (conff= pkg->installed.conffiles; conff; conff= conff->next) { static struct varbuf fnvb, removevb; if (conff->obsolete) { debug(dbg_conffdetail, "removal_bulk conffile obsolete %s", conff->name); } varbuf_reset(&fnvb); r= conffderef(pkg, &fnvb, conff->name); debug(dbg_conffdetail, "removal_bulk conffile `%s' (= `%s')", conff->name, r == -1 ? "" : fnvb.buf); if (r == -1) continue; conffnameused = fnvb.used; if (unlink(fnvb.buf) && errno != ENOENT && errno != ENOTDIR) ohshite(_("cannot remove old config file `%.250s' (= `%.250s')"), conff->name, fnvb.buf); p= strrchr(fnvb.buf,'/'); if (!p) continue; *p = '\0'; varbuf_reset(&removevb); varbuf_add_str(&removevb, fnvb.buf); varbuf_add_char(&removevb, '/'); removevbbase= removevb.used; varbuf_end_str(&removevb); dsd= opendir(removevb.buf); if (!dsd) { int e=errno; debug(dbg_conffdetail, "removal_bulk conffile no dsd %s %s", fnvb.buf, strerror(e)); errno= e; if (errno == ENOENT || errno == ENOTDIR) continue; ohshite(_("cannot read config file dir `%.250s' (from `%.250s')"), fnvb.buf, conff->name); } debug(dbg_conffdetail, "removal_bulk conffile cleaning dsd %s", fnvb.buf); push_cleanup(cu_closedir, ~0, NULL, 0, 1, (void *)dsd); *p= '/'; conffbasenamelen= strlen(++p); conffbasename= fnvb.buf+conffnameused-conffbasenamelen; while ((de = readdir(dsd)) != NULL) { debug(dbg_stupidlyverbose, "removal_bulk conffile dsd entry=`%s'" " conffbasename=`%s' conffnameused=%d conffbasenamelen=%d", de->d_name, conffbasename, conffnameused, conffbasenamelen); if (!strncmp(de->d_name,conffbasename,conffbasenamelen)) { debug(dbg_stupidlyverbose, "removal_bulk conffile dsd entry starts right"); for (ext= removeconffexts; *ext; ext++) if (!strcmp(*ext,de->d_name+conffbasenamelen)) goto yes_remove; p= de->d_name+conffbasenamelen; if (*p++ == '~') { while (*p && cisdigit(*p)) p++; if (*p == '~' && !*++p) goto yes_remove; } } debug(dbg_stupidlyverbose, "removal_bulk conffile dsd entry starts wrong"); if (de->d_name[0] == '#' && !strncmp(de->d_name+1,conffbasename,conffbasenamelen) && !strcmp(de->d_name+1+conffbasenamelen,"#")) goto yes_remove; debug(dbg_stupidlyverbose, "removal_bulk conffile dsd entry not it"); continue; yes_remove: varbuf_trunc(&removevb, removevbbase); varbuf_add_str(&removevb, de->d_name); varbuf_end_str(&removevb); debug(dbg_conffdetail, "removal_bulk conffile dsd entry removing `%s'", removevb.buf); if (unlink(removevb.buf) && errno != ENOENT && errno != ENOTDIR) ohshite(_("cannot remove old backup config file `%.250s' (of `%.250s')"), removevb.buf, conff->name); } pop_cleanup(ehflag_normaltidy); /* closedir */ } /* Remove the conffiles from the file list file. */ write_filelist_except(pkg, pkg->clientdata->files, fnnf_old_conff); pkg->installed.conffiles = NULL; modstatdb_note(pkg); maintainer_script_installed(pkg, POSTRMFILE, "post-removal", "purge", NULL); } /* * This is used both by deferred_remove() in this file, and at the end of * process_archive() in archives.c if it needs to finish removing a * conflicting package. */ void removal_bulk(struct pkginfo *pkg) { bool foundpostrm; debug(dbg_general,"removal_bulk package %s",pkg->name); if (pkg->status == stat_halfinstalled || pkg->status == stat_unpacked) { removal_bulk_remove_files(pkg); } foundpostrm = pkg_infodb_has_file(pkg, POSTRMFILE); debug(dbg_general, "removal_bulk purging? foundpostrm=%d",foundpostrm); if (!foundpostrm && !pkg->installed.conffiles) { /* If there are no config files and no postrm script then we * go straight into ‘purge’. */ debug(dbg_general, "removal_bulk no postrm, no conffiles, purging"); pkg->want= want_purge; blankversion(&pkg->configversion); } else if (pkg->want == want_purge) { removal_bulk_remove_configfiles(pkg); } /* I.e., either of the two branches above. */ if (pkg->want == want_purge) { const char *filename; /* Retry empty directories, and warn on any leftovers that aren't. */ removal_bulk_remove_leftover_dirs(pkg); filename = pkgadminfile(pkg, LISTFILE); debug(dbg_general, "removal_bulk purge done, removing list `%s'", filename); if (unlink(filename) && errno != ENOENT) ohshite(_("cannot remove old files list")); filename = pkgadminfile(pkg, POSTRMFILE); debug(dbg_general, "removal_bulk purge done, removing postrm `%s'", filename); if (unlink(filename) && errno != ENOENT) ohshite(_("can't remove old postrm script")); pkg->status= stat_notinstalled; pkg->want = want_unknown; /* This will mess up reverse links, but if we follow them * we won't go back because pkg->status is stat_notinstalled. */ pkgbin_blank(&pkg->installed); } pkg->eflag = eflag_ok; modstatdb_note(pkg); debug(dbg_general, "removal done"); }