/* * dpkg - main program for package management * unpack.c - .deb archive unpacking * * Copyright © 1995 Ian Jackson * Copyright © 2006-2015 Guillem Jover * Copyright © 2011 Linaro Limited * Copyright © 2011 Raphaël Hertzog * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include "file-match.h" #include "main.h" #include "archives.h" static const char * summarize_filename(const char *filename) { const char *pfilename; char *pfilenamebuf; for (pfilename = filename; pfilename && strlen(pfilename) > 30 && strchr(pfilename, '/') != NULL; pfilename++) pfilename = strchr(pfilename, '/'); if (pfilename && pfilename != filename) { pfilenamebuf = nfmalloc(strlen(pfilename) + 5); sprintf(pfilenamebuf, _(".../%s"), pfilename); pfilename = pfilenamebuf; } else { pfilename = filename; } return pfilename; } static bool deb_reassemble(const char **filename, const char **pfilename) { static char *reasmbuf = NULL; struct stat stab; int status; pid_t pid; if (!reasmbuf) reasmbuf = dpkg_db_get_path(REASSEMBLETMP); if (unlink(reasmbuf) && errno != ENOENT) ohshite(_("error ensuring '%.250s' doesn't exist"), reasmbuf); push_cleanup(cu_pathname, ~0, 1, (void *)reasmbuf); pid = subproc_fork(); if (!pid) { execlp(SPLITTER, SPLITTER, "-Qao", reasmbuf, *filename, NULL); ohshite(_("unable to execute %s (%s)"), _("split package reassembly"), SPLITTER); } status = subproc_reap(pid, SPLITTER, SUBPROC_RETERROR); switch (status) { case 0: /* It was a part - is it complete? */ if (!stat(reasmbuf, &stab)) { /* Yes. */ *filename = reasmbuf; *pfilename = _("reassembled package file"); break; } else if (errno == ENOENT) { /* No. That's it, we skip it. */ return false; } case 1: /* No, it wasn't a part. */ break; default: ohshit(_("subprocess %s returned error exit status %d"), SPLITTER, status); } return true; } static void deb_verify(const char *filename) { pid_t pid; /* We have to check on every unpack, in case the debsig-verify package * gets installed or removed. */ if (!command_in_path(DEBSIGVERIFY)) return; printf(_("Authenticating %s ...\n"), filename); fflush(stdout); pid = subproc_fork(); if (!pid) { execlp(DEBSIGVERIFY, DEBSIGVERIFY, "-q", filename, NULL); ohshite(_("unable to execute %s (%s)"), _("package signature verification"), DEBSIGVERIFY); } else { int status; status = subproc_reap(pid, "debsig-verify", SUBPROC_NOCHECK); if (!(WIFEXITED(status) && WEXITSTATUS(status) == 0)) { if (!in_force(FORCE_BAD_VERIFY)) ohshit(_("verification on package %s failed!"), filename); else notice(_("verification on package %s failed; " "but installing anyway as you requested"), filename); } else { printf(_("passed\n")); } } } static char * get_control_dir(char *cidir) { if (f_noact) { char *tmpdir; tmpdir = mkdtemp(path_make_temp_template("dpkg")); if (tmpdir == NULL) ohshite(_("unable to create temporary directory")); cidir = m_realloc(cidir, strlen(tmpdir) + MAXCONTROLFILENAME + 10); strcpy(cidir, tmpdir); free(tmpdir); } else { const char *admindir; admindir = dpkg_db_get_dir(); /* The admindir length is always constant on a dpkg execution run. */ if (cidir == NULL) cidir = m_malloc(strlen(admindir) + sizeof(CONTROLDIRTMP) + MAXCONTROLFILENAME + 10); /* We want it to be on the same filesystem so that we can * use rename(2) to install the postinst &c. */ strcpy(cidir, admindir); strcat(cidir, "/" CONTROLDIRTMP); /* Make sure the control information directory is empty. */ path_remove_tree(cidir); } strcat(cidir, "/"); return cidir; } static void pkg_check_depcon(struct pkginfo *pkg, const char *pfilename) { struct dependency *dsearch; struct deppossi *psearch; struct pkginfo *fixbytrigaw; static struct varbuf depprobwhy; /* Check if anything is installed that we conflict with, or not installed * that we need. */ ensure_package_clientdata(pkg); pkg->clientdata->istobe = PKG_ISTOBE_INSTALLNEW; for (dsearch = pkg->available.depends; dsearch; dsearch = dsearch->next) { switch (dsearch->type) { case dep_conflicts: /* Look for things we conflict with. */ check_conflict(dsearch, pkg, pfilename); break; case dep_breaks: /* Look for things we break. */ check_breaks(dsearch, pkg, pfilename); break; case dep_provides: /* Look for things that conflict with what we provide. */ for (psearch = dsearch->list->ed->depended.installed; psearch; psearch = psearch->rev_next) { if (psearch->up->type != dep_conflicts) continue; check_conflict(psearch->up, pkg, pfilename); } break; case dep_suggests: case dep_recommends: case dep_depends: case dep_replaces: case dep_enhances: /* Ignore these here. */ break; case dep_predepends: if (!depisok(dsearch, &depprobwhy, NULL, &fixbytrigaw, true)) { if (fixbytrigaw) { while (fixbytrigaw->trigaw.head) trigproc(fixbytrigaw->trigaw.head->pend, TRIGPROC_REQUIRED); } else { notice(_("regarding %s containing %s, pre-dependency problem:\n%s"), pfilename, pkgbin_name(pkg, &pkg->available, pnaw_nonambig), varbuf_str(&depprobwhy)); if (!force_depends(dsearch->list)) ohshit(_("pre-dependency problem - not installing %.250s"), pkgbin_name(pkg, &pkg->available, pnaw_nonambig)); warning(_("ignoring pre-dependency problem!")); } } } } /* Look for things that conflict with us. */ for (psearch = pkg->set->depended.installed; psearch; psearch = psearch->rev_next) { if (psearch->up->type != dep_conflicts) continue; check_conflict(psearch->up, pkg, pfilename); } } static void pkg_deconfigure_others(struct pkginfo *pkg) { struct pkg_deconf_list *deconpil; for (deconpil = deconfigure; deconpil; deconpil = deconpil->next) { struct pkginfo *removing = deconpil->pkg_removal; if (deconpil->reason == PKG_WANT_DEINSTALL) { printf(_("De-configuring %s (%s), to allow removal of %s (%s) ...\n"), pkg_name(deconpil->pkg, pnaw_nonambig), versiondescribe(&deconpil->pkg->installed.version, vdew_nonambig), pkg_name(removing, pnaw_nonambig), versiondescribe(&removing->installed.version, vdew_nonambig)); } else if (deconpil->reason == PKG_WANT_INSTALL) { printf(_("De-configuring %s (%s), to allow installation of %s (%s) ...\n"), pkg_name(deconpil->pkg, pnaw_nonambig), versiondescribe(&deconpil->pkg->installed.version, vdew_nonambig), pkg_name(pkg, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig)); } else { printf(_("De-configuring %s (%s), to allow configuration of %s (%s) ...\n"), pkg_name(deconpil->pkg, pnaw_nonambig), versiondescribe(&deconpil->pkg->installed.version, vdew_nonambig), pkg_name(pkg, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig)); } trig_activate_packageprocessing(deconpil->pkg); pkg_set_status(deconpil->pkg, PKG_STAT_HALFCONFIGURED); modstatdb_note(deconpil->pkg); /* This means that we *either* go and run postinst abort-deconfigure, * *or* queue the package for later configure processing, depending * on which error cleanup route gets taken. */ push_cleanup_fallback(cu_prermdeconfigure, ~ehflag_normaltidy, ok_prermdeconfigure, ehflag_normaltidy, 3, (void *)deconpil->pkg, (void *)removing, (void *)pkg); if (removing) { maintscript_installed(deconpil->pkg, PRERMFILE, "pre-removal", "deconfigure", "in-favour", pkgbin_name(pkg, &pkg->available, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), "removing", pkg_name(removing, pnaw_nonambig), versiondescribe(&removing->installed.version, vdew_nonambig), NULL); } else { maintscript_installed(deconpil->pkg, PRERMFILE, "pre-removal", "deconfigure", "in-favour", pkgbin_name(pkg, &pkg->available, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), NULL); } } } /** * Read the conffiles, and copy the hashes across. */ static void deb_parse_conffiles(const struct pkginfo *pkg, const char *control_conffiles, struct fsys_namenode_queue *newconffiles) { FILE *conff; char conffilenamebuf[MAXCONFFILENAME]; conff = fopen(control_conffiles, "r"); if (conff == NULL) { if (errno == ENOENT) return; ohshite(_("error trying to open %.250s"), control_conffiles); } push_cleanup(cu_closestream, ehflag_bombout, 1, conff); while (fgets(conffilenamebuf, MAXCONFFILENAME - 2, conff)) { struct pkginfo *otherpkg; struct fsys_node_pkgs_iter *iter; struct fsys_namenode *namenode; struct fsys_namenode_list *newconff; struct conffile *searchconff; char *conffilename = conffilenamebuf; char *p; enum fsys_namenode_flags confflags = FNNF_NEW_CONFF; p = conffilename + strlen(conffilename); if (p == conffilename) ohshit(_("conffile file contains an empty line")); if (p[-1] != '\n') ohshit(_("conffile name '%s' is too long, or missing final newline"), conffilename); p = str_rtrim_spaces(conffilename, p); if (p == conffilename) continue; /* Check for conffile flags. */ if (conffilename[0] != '/') { char *flag = conffilename; char *flag_end = strchr(flag, ' '); if (flag_end) conffilename = flag_end + 1; /* If no flag separator is found, assume a missing leading slash. */ if (flag_end == NULL || (conffilename[0] && conffilename[0] != '/')) ohshit(_("conffile name '%s' is not an absolute pathname"), conffilename); flag_end[0] = '\0'; /* Otherwise assume a missing filename after the flag separator. */ if (conffilename[0] == '\0') ohshit(_("conffile name missing after flag '%s'"), flag); if (strcmp(flag, "remove-on-upgrade") == 0) { confflags |= FNNF_RM_CONFF_ON_UPGRADE; confflags &= ~FNNF_NEW_CONFF; } else { if (c_isspace(flag[0])) warning(_("line with conffile filename '%s' has leading white spaces"), conffilename); ohshit(_("unknown flag '%s' for conffile '%s'"), flag, conffilename); } } namenode = fsys_hash_find_node(conffilename, FHFF_NONE); namenode->oldhash = NEWCONFFILEFLAG; newconff = tar_fsys_namenode_queue_push(newconffiles, namenode); /* * Let's see if any packages have this file. * * If they do we check to see if they listed it as a conffile, * and if they did we copy the hash across. Since (for plain * file conffiles, which is the only kind we are supposed to * have) there will only be one package which ‘has’ the file, * this will usually mean we only look in the package which * we are installing now. * * The ‘conffiles’ data in the status file is ignored when a * package is not also listed in the file ownership database as * having that file. If several packages are listed as owning * the file we pick one at random. */ searchconff = NULL; iter = fsys_node_pkgs_iter_new(newconff->namenode); while ((otherpkg = fsys_node_pkgs_iter_next(iter))) { debug(dbg_conffdetail, "process_archive conffile '%s' in package %s - conff ?", newconff->namenode->name, pkg_name(otherpkg, pnaw_always)); for (searchconff = otherpkg->installed.conffiles; searchconff && strcmp(newconff->namenode->name, searchconff->name); searchconff = searchconff->next) debug(dbg_conffdetail, "process_archive conffile '%s' in package %s - conff ? not '%s'", newconff->namenode->name, pkg_name(otherpkg, pnaw_always), searchconff->name); if (searchconff) { debug(dbg_conff, "process_archive conffile '%s' package=%s %s hash=%s", newconff->namenode->name, pkg_name(otherpkg, pnaw_always), otherpkg == pkg ? "same" : "different!", searchconff->hash); if (otherpkg == pkg) break; } } fsys_node_pkgs_iter_free(iter); if (searchconff) { /* We don't copy ‘obsolete’; it's not obsolete in the new package. */ newconff->namenode->oldhash = searchconff->hash; } else { debug(dbg_conff, "process_archive conffile '%s' no package, no hash", newconff->namenode->name); } newconff->namenode->flags |= confflags; } if (ferror(conff)) ohshite(_("read error in %.250s"), control_conffiles); pop_cleanup(ehflag_normaltidy); /* conff = fopen() */ if (fclose(conff)) ohshite(_("error closing %.250s"), control_conffiles); } static struct pkg_queue conflictors = PKG_QUEUE_INIT; void enqueue_conflictor(struct pkginfo *pkg) { pkg_queue_push(&conflictors, pkg); } static void pkg_infodb_remove_file(const char *filename, const char *filetype) { if (unlink(filename)) ohshite(_("unable to delete control info file '%.250s'"), filename); debug(dbg_scripts, "removal_bulk info unlinked %s", filename); } static struct match_node *match_head = NULL; static void pkg_infodb_update_file(const char *filename, const char *filetype) { if (strlen(filetype) > MAXCONTROLFILENAME) ohshit(_("old version of package has overly-long info file name starting '%.250s'"), filename); /* We do the list separately. */ if (strcmp(filetype, LISTFILE) == 0) return; /* We keep files to rename in a list as doing the rename immediately * might influence the current readdir(), the just renamed file might * be returned a second time as it's actually a new file from the * point of view of the filesystem. */ match_head = match_node_new(filename, filetype, match_head); } static void pkg_infodb_update(struct pkginfo *pkg, char *cidir, char *cidirrest) { struct match_node *match_node; DIR *dsd; struct dirent *de; /* Deallocate the match list in case we aborted previously. */ while ((match_node = match_head)) { match_head = match_node->next; match_node_free(match_node); } pkg_infodb_foreach(pkg, &pkg->available, pkg_infodb_update_file); while ((match_node = match_head)) { strcpy(cidirrest, match_node->filetype); if (!rename(cidir, match_node->filename)) { debug(dbg_scripts, "process_archive info installed %s as %s", cidir, match_node->filename); } else if (errno == ENOENT) { /* Right, no new version. */ if (unlink(match_node->filename)) ohshite(_("unable to remove obsolete info file '%.250s'"), match_node->filename); debug(dbg_scripts, "process_archive info unlinked %s", match_node->filename); } else { ohshite(_("unable to install (supposed) new info file '%.250s'"), cidir); } match_head = match_node->next; match_node_free(match_node); } /* The control directory itself. */ cidirrest[0] = '\0'; dsd = opendir(cidir); if (!dsd) ohshite(_("unable to open temp control directory")); push_cleanup(cu_closedir, ~0, 1, (void *)dsd); while ((de = readdir(dsd))) { const char *newinfofilename; if (strchr(de->d_name, '.')) { debug(dbg_scripts, "process_archive tmp.ci script/file '%s' contains dot", de->d_name); continue; } if (strlen(de->d_name) > MAXCONTROLFILENAME) ohshit(_("package contains overly-long control info file name (starting '%.50s')"), de->d_name); strcpy(cidirrest, de->d_name); /* First we check it's not a directory. */ if (rmdir(cidir) == 0) ohshit(_("package control info contained directory '%.250s'"), cidir); else if (errno != ENOTDIR) ohshite(_("package control info rmdir of '%.250s' didn't say not a dir"), de->d_name); /* Ignore the control file. */ if (strcmp(de->d_name, CONTROLFILE) == 0) { debug(dbg_scripts, "process_archive tmp.ci script/file '%s' is control", cidir); continue; } if (strcmp(de->d_name, LISTFILE) == 0) { warning(_("package %s contained list as info file"), pkgbin_name(pkg, &pkg->available, pnaw_nonambig)); continue; } /* Right, install it */ newinfofilename = pkg_infodb_get_file(pkg, &pkg->available, de->d_name); if (rename(cidir, newinfofilename)) ohshite(_("unable to install new info file '%.250s' as '%.250s'"), cidir, newinfofilename); debug(dbg_scripts, "process_archive tmp.ci script/file '%s' installed as '%s'", cidir, newinfofilename); } pop_cleanup(ehflag_normaltidy); /* closedir */ /* If the old and new versions use a different infodb layout, get rid * of the files using the old layout. */ if (pkg->installed.multiarch != pkg->available.multiarch && (pkg->installed.multiarch == PKG_MULTIARCH_SAME || pkg->available.multiarch == PKG_MULTIARCH_SAME)) { debug(dbg_scripts, "process_archive remove old info files after db layout switch"); pkg_infodb_foreach(pkg, &pkg->installed, pkg_infodb_remove_file); } dir_sync_path(pkg_infodb_get_dir()); } static void pkg_remove_conffile_on_upgrade(struct pkginfo *pkg, struct fsys_namenode *namenode) { struct pkginfo *otherpkg; struct fsys_namenode *usenode; struct fsys_node_pkgs_iter *iter; struct varbuf cdr = VARBUF_INIT; struct varbuf cdrext = VARBUF_INIT; struct varbuf_state cdrext_state; char currenthash[MD5HASHLEN + 1]; int rc; usenode = namenodetouse(namenode, pkg, &pkg->installed); rc = conffderef(pkg, &cdr, usenode->name); if (rc < 0) { debug(dbg_conffdetail, "%s: '%s' conffile dereference error: %s", __func__, namenode->name, strerror(errno)); namenode->oldhash = EMPTYHASHFLAG; return; } varbuf_set_varbuf(&cdrext, &cdr); varbuf_snapshot(&cdrext, &cdrext_state); iter = fsys_node_pkgs_iter_new(namenode); while ((otherpkg = fsys_node_pkgs_iter_next(iter))) { debug(dbg_conffdetail, "%s: namenode '%s' owned by other %s?", __func__, namenode->name, pkg_name(otherpkg, pnaw_always)); if (otherpkg == pkg) continue; debug(dbg_conff, "%s: namenode '%s' owned by other %s, remove-on-upgrade ignored", __func__, namenode->name, pkg_name(otherpkg, pnaw_always)); fsys_node_pkgs_iter_free(iter); return; } fsys_node_pkgs_iter_free(iter); /* Remove DPKGDISTEXT variant if still present. */ varbuf_rollback(&cdrext_state); varbuf_add_str(&cdrext, DPKGDISTEXT); if (unlink(cdrext.buf) < 0 && errno != ENOENT) warning(_("%s: failed to remove '%.250s': %s"), pkg_name(pkg, pnaw_nonambig), cdrext.buf, strerror(errno)); md5hash(pkg, currenthash, cdr.buf); /* Has it been already removed (e.g. by local admin)? */ if (strcmp(currenthash, NONEXISTENTFLAG) == 0) return; /* For unmodified conffiles, we just remove them. */ if (strcmp(currenthash, namenode->oldhash) == 0) { printf(_("Removing obsolete conffile %s ...\n"), cdr.buf); if (unlink(cdr.buf) < 0 && errno != ENOENT) warning(_("%s: failed to remove '%.250s': %s"), pkg_name(pkg, pnaw_nonambig), cdr.buf, strerror(errno)); return; } /* Otherwise, preserve the modified conffile. */ varbuf_rollback(&cdrext_state); varbuf_add_str(&cdrext, DPKGOLDEXT); printf(_("Obsolete conffile '%s' has been modified by you.\n"), cdr.buf); printf(_("Saving as %s ...\n"), cdrext.buf); if (rename(cdr.buf, cdrext.buf) < 0) warning(_("%s: cannot rename obsolete conffile '%s' to '%s': %s"), pkg_name(pkg, pnaw_nonambig), cdr.buf, cdrext.buf, strerror(errno)); } static void pkg_remove_old_files(struct pkginfo *pkg, struct fsys_namenode_queue *newfiles_queue, struct fsys_namenode_queue *newconffiles) { struct fsys_hash_rev_iter rev_iter; struct fsys_namenode_list *cfile; struct fsys_namenode *namenode; struct stat stab, oldfs; /* Before removing any old files, we try to remove obsolete conffiles that * have been requested to be removed during upgrade. These conffiles are * not tracked as part of the package file lists, so removing them here * means we will get their parent directories removed if not present in the * new package without needing to do anything special ourselves. */ for (cfile = newconffiles->head; cfile; cfile = cfile->next) { debug(dbg_conffdetail, "%s: removing conffile '%s' for %s?", __func__, cfile->namenode->name, pkg_name(pkg, pnaw_always)); if (!(cfile->namenode->flags & FNNF_RM_CONFF_ON_UPGRADE)) continue; pkg_remove_conffile_on_upgrade(pkg, cfile->namenode); } fsys_hash_rev_iter_init(&rev_iter, pkg->files); while ((namenode = fsys_hash_rev_iter_next(&rev_iter))) { struct fsys_namenode *usenode; if ((namenode->flags & FNNF_NEW_CONFF) || (namenode->flags & FNNF_RM_CONFF_ON_UPGRADE) || (namenode->flags & FNNF_NEW_INARCHIVE)) continue; usenode = namenodetouse(namenode, pkg, &pkg->installed); varbuf_rollback(&fname_state); varbuf_add_str(&fnamevb, usenode->name); if (!stat(fnamevb.buf, &stab) && S_ISDIR(stab.st_mode)) { debug(dbg_eachfiledetail, "process_archive: %s is a directory", fnamevb.buf); if (dir_is_used_by_others(namenode, pkg)) continue; } if (lstat(varbuf_str(&fnamevb), &oldfs)) { if (!(errno == ENOENT || errno == ELOOP || errno == ENOTDIR)) warning(_("could not stat old file '%.250s' so not deleting it: %s"), varbuf_str(&fnamevb), strerror(errno)); continue; } if (S_ISDIR(oldfs.st_mode)) { trig_path_activate(usenode, pkg); /* Do not try to remove the root directory. */ if (strcmp(usenode->name, "/.") == 0) continue; if (rmdir(varbuf_str(&fnamevb))) { warning(_("unable to delete old directory '%.250s': %s"), namenode->name, strerror(errno)); } else if ((namenode->flags & FNNF_OLD_CONFF)) { warning(_("old conffile '%.250s' was an empty directory " "(and has now been deleted)"), namenode->name); } } else { struct fsys_namenode_list *sameas = NULL; static struct file_ondisk_id empty_ondisk_id; struct varbuf cfilename = VARBUF_INIT; /* * Ok, it's an old file, but is it really not in the new package? * It might be known by a different name because of symlinks. * * We need to check to make sure, so we stat the file, then compare * it to the new list. If we find a dev/inode match, we assume they * are the same file, and leave it alone. NOTE: we don't check in * other packages for sanity reasons (we don't want to stat _all_ * the files on the system). * * We run down the list of _new_ files in this package. This keeps * the process a little leaner. We are only worried about new ones * since ones that stayed the same don't really apply here. */ /* If we can't stat the old or new file, or it's a directory, * we leave it up to the normal code. */ debug(dbg_eachfile, "process_archive: checking %s for same files on " "upgrade/downgrade", varbuf_str(&fnamevb)); for (cfile = newfiles_queue->head; cfile; cfile = cfile->next) { /* If the file has been filtered then treat it as if it didn't exist * on the file system. */ if (cfile->namenode->flags & FNNF_FILTERED) continue; if (cfile->namenode->file_ondisk_id == NULL) { struct stat tmp_stat; varbuf_set_str(&cfilename, dpkg_fsys_get_dir()); varbuf_add_str(&cfilename, cfile->namenode->name); if (lstat(varbuf_str(&cfilename), &tmp_stat) == 0) { struct file_ondisk_id *file_ondisk_id; file_ondisk_id = nfmalloc(sizeof(*file_ondisk_id)); file_ondisk_id->id_dev = tmp_stat.st_dev; file_ondisk_id->id_ino = tmp_stat.st_ino; cfile->namenode->file_ondisk_id = file_ondisk_id; } else { if (!(errno == ENOENT || errno == ELOOP || errno == ENOTDIR)) ohshite(_("unable to stat other new file '%.250s'"), cfile->namenode->name); cfile->namenode->file_ondisk_id = &empty_ondisk_id; continue; } } if (cfile->namenode->file_ondisk_id == &empty_ondisk_id) continue; if (oldfs.st_dev == cfile->namenode->file_ondisk_id->id_dev && oldfs.st_ino == cfile->namenode->file_ondisk_id->id_ino) { if (sameas) warning(_("old file '%.250s' is the same as several new files! " "(both '%.250s' and '%.250s')"), varbuf_str(&fnamevb), sameas->namenode->name, cfile->namenode->name); sameas = cfile; debug(dbg_eachfile, "process_archive: not removing %s, " "since it matches %s", varbuf_str(&fnamevb), cfile->namenode->name); } } varbuf_destroy(&cfilename); if ((namenode->flags & FNNF_OLD_CONFF)) { if (sameas) { if (sameas->namenode->flags & FNNF_NEW_CONFF) { if (strcmp(sameas->namenode->oldhash, NEWCONFFILEFLAG) == 0) { sameas->namenode->oldhash = namenode->oldhash; debug(dbg_eachfile, "process_archive: old conff %s " "is same as new conff %s, copying hash", namenode->name, sameas->namenode->name); } else { debug(dbg_eachfile, "process_archive: old conff %s " "is same as new conff %s but latter already has hash", namenode->name, sameas->namenode->name); } } } else { debug(dbg_eachfile, "process_archive: old conff %s " "is disappearing", namenode->name); namenode->flags |= FNNF_OBS_CONFF; tar_fsys_namenode_queue_push(newconffiles, namenode); tar_fsys_namenode_queue_push(newfiles_queue, namenode); } continue; } if (sameas) continue; trig_path_activate(usenode, pkg); if (secure_unlink_statted(varbuf_str(&fnamevb), &oldfs)) { warning(_("unable to securely remove old file '%.250s': %s"), namenode->name, strerror(errno)); } } /* !S_ISDIR */ } } static void pkg_update_fields(struct pkginfo *pkg, struct fsys_namenode_queue *newconffiles) { struct dependency *newdeplist, **newdeplistlastp; struct dependency *dep; struct conffile **iconffileslastp, *newiconff; struct fsys_namenode_list *cfile; /* The dependencies are the most difficult. We have to build * a whole new forward dependency tree. At least the reverse * links (linking our deppossi's into the reverse chains) * can be done by copy_dependency_links. */ newdeplist = NULL; newdeplistlastp = &newdeplist; for (dep = pkg->available.depends; dep; dep = dep->next) { struct deppossi **newpossilastp, *possi; struct dependency *newdep; newdep = nfmalloc(sizeof(*newdep)); newdep->up = pkg; newdep->next = NULL; newdep->list = NULL; newpossilastp = &newdep->list; for (possi = dep->list; possi; possi = possi->next) { struct deppossi *newpossi; newpossi = nfmalloc(sizeof(*newpossi)); newpossi->up = newdep; newpossi->ed = possi->ed; newpossi->next = NULL; newpossi->rev_next = newpossi->rev_prev = NULL; newpossi->arch_is_implicit = possi->arch_is_implicit; newpossi->arch = possi->arch; newpossi->verrel = possi->verrel; if (possi->verrel != DPKG_RELATION_NONE) newpossi->version = possi->version; else dpkg_version_blank(&newpossi->version); newpossi->cyclebreak = false; *newpossilastp = newpossi; newpossilastp = &newpossi->next; } newdep->type = dep->type; *newdeplistlastp = newdep; newdeplistlastp = &newdep->next; } /* Right, now we've replicated the forward tree, we * get copy_dependency_links to remove all the old dependency * structures from the reverse links and add the new dependency * structures in instead. It also copies the new dependency * structure pointer for this package into the right field. */ copy_dependency_links(pkg, &pkg->installed.depends, newdeplist, 0); /* We copy the text fields. */ pkg->installed.essential = pkg->available.essential; pkg->installed.is_protected = pkg->available.is_protected; pkg->installed.multiarch = pkg->available.multiarch; pkg->installed.description = pkg->available.description; pkg->installed.maintainer = pkg->available.maintainer; pkg->installed.source = pkg->available.source; pkg->installed.arch = pkg->available.arch; pkg->installed.pkgname_archqual = pkg->available.pkgname_archqual; pkg->installed.installedsize = pkg->available.installedsize; pkg->installed.version = pkg->available.version; pkg->installed.origin = pkg->available.origin; pkg->installed.bugs = pkg->available.bugs; /* We have to generate our own conffiles structure. */ pkg->installed.conffiles = NULL; iconffileslastp = &pkg->installed.conffiles; for (cfile = newconffiles->head; cfile; cfile = cfile->next) { newiconff = nfmalloc(sizeof(*newiconff)); newiconff->next = NULL; newiconff->name = nfstrsave(cfile->namenode->name); newiconff->hash = nfstrsave(cfile->namenode->oldhash); newiconff->flags = CONFFILE_NONE; if (cfile->namenode->flags & FNNF_OBS_CONFF) newiconff->flags |= CONFFILE_OBSOLETE; if (cfile->namenode->flags & FNNF_RM_CONFF_ON_UPGRADE) newiconff->flags |= CONFFILE_REMOVE_ON_UPGRADE; *iconffileslastp = newiconff; iconffileslastp = &newiconff->next; } /* We can just copy the arbitrary fields list, because it is * never even rearranged. Phew! */ pkg->installed.arbs = pkg->available.arbs; } static void pkg_disappear(struct pkginfo *pkg, struct pkginfo *infavour) { printf(_("(Noting disappearance of %s, which has been completely replaced.)\n"), pkg_name(pkg, pnaw_nonambig)); log_action("disappear", pkg, &pkg->installed); debug(dbg_general, "pkg_disappear disappearing %s", pkg_name(pkg, pnaw_always)); trig_activate_packageprocessing(pkg); maintscript_installed(pkg, POSTRMFILE, "post-removal script (for disappearance)", "disappear", pkgbin_name(infavour, &infavour->available, pnaw_nonambig), versiondescribe(&infavour->available.version, vdew_nonambig), NULL); /* OK, now we delete all the stuff in the ‘info’ directory ... */ debug(dbg_general, "pkg_disappear cleaning info directory"); pkg_infodb_foreach(pkg, &pkg->installed, pkg_infodb_remove_file); dir_sync_path(pkg_infodb_get_dir()); pkg_set_status(pkg, PKG_STAT_NOTINSTALLED); pkg_set_want(pkg, PKG_WANT_UNKNOWN); pkg_reset_eflags(pkg); dpkg_version_blank(&pkg->configversion); pkgbin_blank(&pkg->installed); pkg->files_list_valid = false; modstatdb_note(pkg); } static void pkg_disappear_others(struct pkginfo *pkg) { struct pkg_hash_iter *iter; struct pkginfo *otherpkg; struct fsys_namenode_list *cfile; struct deppossi *pdep; struct dependency *providecheck; struct varbuf depprobwhy = VARBUF_INIT; iter = pkg_hash_iter_new(); while ((otherpkg = pkg_hash_iter_next_pkg(iter)) != NULL) { ensure_package_clientdata(otherpkg); if (otherpkg == pkg || otherpkg->status == PKG_STAT_NOTINSTALLED || otherpkg->status == PKG_STAT_CONFIGFILES || otherpkg->clientdata->istobe == PKG_ISTOBE_REMOVE || !otherpkg->files) continue; /* Do not try to disappear other packages from the same set * if they are Multi-Arch: same */ if (pkg->installed.multiarch == PKG_MULTIARCH_SAME && otherpkg->installed.multiarch == PKG_MULTIARCH_SAME && otherpkg->set == pkg->set) continue; debug(dbg_veryverbose, "process_archive checking disappearance %s", pkg_name(otherpkg, pnaw_always)); if (otherpkg->clientdata->istobe != PKG_ISTOBE_NORMAL && otherpkg->clientdata->istobe != PKG_ISTOBE_DECONFIGURE) internerr("disappearing package %s is not to be normal or deconfigure, " "is to be %d", pkg_name(otherpkg, pnaw_always), otherpkg->clientdata->istobe); for (cfile = otherpkg->files; cfile && strcmp(cfile->namenode->name, "/.") == 0; cfile = cfile->next); if (!cfile) { debug(dbg_stupidlyverbose, "process_archive no non-root, no disappear"); continue; } for (cfile = otherpkg->files; cfile && !filesavespackage(cfile, otherpkg, pkg); cfile = cfile->next); if (cfile) continue; /* So dependency things will give right answers ... */ otherpkg->clientdata->istobe = PKG_ISTOBE_REMOVE; debug(dbg_veryverbose, "process_archive disappear checking dependencies"); for (pdep = otherpkg->set->depended.installed; pdep; pdep = pdep->rev_next) { if (pdep->up->type != dep_depends && pdep->up->type != dep_predepends && pdep->up->type != dep_recommends) continue; if (depisok(pdep->up, &depprobwhy, NULL, NULL, false)) continue; debug(dbg_veryverbose,"process_archive cannot disappear: %s", varbuf_str(&depprobwhy)); break; } if (!pdep) { /* If we haven't found a reason not to yet, let's look some more. */ for (providecheck = otherpkg->installed.depends; providecheck; providecheck = providecheck->next) { if (providecheck->type != dep_provides) continue; for (pdep = providecheck->list->ed->depended.installed; pdep; pdep = pdep->rev_next) { if (pdep->up->type != dep_depends && pdep->up->type != dep_predepends && pdep->up->type != dep_recommends) continue; if (depisok(pdep->up, &depprobwhy, NULL, NULL, false)) continue; debug(dbg_veryverbose, "process_archive cannot disappear (provides %s): %s", providecheck->list->ed->name, varbuf_str(&depprobwhy)); goto break_from_both_loops_at_once; } } break_from_both_loops_at_once:; } otherpkg->clientdata->istobe = PKG_ISTOBE_NORMAL; if (pdep) continue; /* No, we're disappearing it. This is the wrong time to go and * run maintainer scripts and things, as we can't back out. But * what can we do ? It has to be run this late. */ pkg_disappear(otherpkg, pkg); } /* while (otherpkg= ... */ pkg_hash_iter_free(iter); } /** * Check if all instances of a pkgset are getting in sync. * * If that's the case, the extraction is going to ensure consistency * of shared files. */ static bool pkgset_getting_in_sync(struct pkginfo *pkg) { struct pkginfo *otherpkg; for (otherpkg = &pkg->set->pkg; otherpkg; otherpkg = otherpkg->arch_next) { if (otherpkg == pkg) continue; if (otherpkg->status <= PKG_STAT_CONFIGFILES) continue; if (dpkg_version_compare(&pkg->available.version, &otherpkg->installed.version)) { return false; } } return true; } static void pkg_remove_files_from_others(struct pkginfo *pkg, struct fsys_namenode_list *newfileslist) { struct fsys_namenode_list *cfile; struct pkginfo *otherpkg; for (cfile = newfileslist; cfile; cfile = cfile->next) { struct fsys_node_pkgs_iter *iter; struct pkgset *divpkgset; if (!(cfile->namenode->flags & FNNF_ELIDE_OTHER_LISTS)) continue; if (cfile->namenode->divert && cfile->namenode->divert->useinstead) { divpkgset = cfile->namenode->divert->pkgset; if (divpkgset == pkg->set) { debug(dbg_eachfile, "process_archive not overwriting any '%s' (overriding, '%s')", cfile->namenode->name, cfile->namenode->divert->useinstead->name); continue; } else { debug(dbg_eachfile, "process_archive looking for overwriting '%s' (overridden by %s)", cfile->namenode->name, divpkgset ? divpkgset->name : ""); } } else { divpkgset = NULL; debug(dbg_eachfile, "process_archive looking for overwriting '%s'", cfile->namenode->name); } iter = fsys_node_pkgs_iter_new(cfile->namenode); while ((otherpkg = fsys_node_pkgs_iter_next(iter))) { debug(dbg_eachfiledetail, "process_archive ... found in %s", pkg_name(otherpkg, pnaw_always)); /* A pkgset can share files between instances, so there's no point * in rewriting the file that's already in place. */ if (otherpkg->set == pkg->set) continue; if (otherpkg->set == divpkgset) { debug(dbg_eachfiledetail, "process_archive ... diverted, skipping"); continue; } if (cfile->namenode->flags & FNNF_NEW_CONFF) conffile_mark_obsolete(otherpkg, cfile->namenode); /* If !files_list_valid then it's one of the disappeared packages above * or we have already updated the files list file, and we don't bother * with it here, clearly. */ if (!otherpkg->files_list_valid) continue; /* Found one. We delete the list entry for this file, * (and any others in the same package) and then mark the package * as requiring a reread. */ write_filelist_except(otherpkg, &otherpkg->installed, otherpkg->files, FNNF_ELIDE_OTHER_LISTS); debug(dbg_veryverbose, "process_archive overwrote from %s", pkg_name(otherpkg, pnaw_always)); } fsys_node_pkgs_iter_free(iter); } } static void pkg_remove_backup_files(struct pkginfo *pkg, struct fsys_namenode_list *newfileslist) { struct fsys_namenode_list *cfile; for (cfile = newfileslist; cfile; cfile = cfile->next) { struct fsys_namenode *usenode; if (cfile->namenode->flags & FNNF_NEW_CONFF) continue; usenode = namenodetouse(cfile->namenode, pkg, &pkg->installed); /* Do not try to remove backups for the root directory. */ if (strcmp(usenode->name, "/.") == 0) continue; varbuf_rollback(&fnametmp_state); varbuf_add_str(&fnametmpvb, usenode->name); varbuf_add_str(&fnametmpvb, DPKGTEMPEXT); path_remove_tree(varbuf_str(&fnametmpvb)); } } void process_archive(const char *filename) { static const struct tar_operations tf = { .read = tarfileread, .extract_file = tarobject, .link = tarobject, .symlink = tarobject, .mkdir = tarobject, .mknod = tarobject, }; /* These need to be static so that we can pass their addresses to * push_cleanup as arguments to the cu_xxx routines; if an error occurs * we unwind the stack before processing the cleanup list, and these * variables had better still exist ... */ static int p1[2]; static enum pkgstatus oldversionstatus; static struct tarcontext tc; struct tar_archive tar; struct dpkg_error err; enum parsedbflags parsedb_flags; int rc; pid_t pid; struct pkginfo *pkg, *otherpkg; struct pkg_list *conflictor_iter; char *cidir = NULL; char *cidirrest; char *psize; const char *pfilename; struct fsys_namenode_queue newconffiles, newfiles_queue; struct stat stab; cleanup_pkg_failed= cleanup_conflictor_failed= 0; pfilename = summarize_filename(filename); if (stat(filename, &stab)) ohshite(_("cannot access archive '%s'"), filename); /* We can't ‘tentatively-reassemble’ packages. */ if (!f_noact) { if (!deb_reassemble(&filename, &pfilename)) return; } /* Verify the package. */ if (!f_nodebsig) deb_verify(filename); /* Get the control information directory. */ cidir = get_control_dir(cidir); cidirrest = cidir + strlen(cidir); push_cleanup(cu_cidir, ~0, 2, (void *)cidir, (void *)cidirrest); pid = subproc_fork(); if (pid == 0) { cidirrest[-1] = '\0'; execlp(BACKEND, BACKEND, "--control", filename, cidir, NULL); ohshite(_("unable to execute %s (%s)"), _("package control information extraction"), BACKEND); } subproc_reap(pid, BACKEND " --control", 0); /* We want to guarantee the extracted files are on the disk, so that the * subsequent renames to the info database do not end up with old or zero * length files in case of a system crash. As neither dpkg-deb nor tar do * explicit fsync()s, we have to do them here. * XXX: This could be avoided by switching to an internal tar extractor. */ dir_sync_contents(cidir); strcpy(cidirrest,CONTROLFILE); if (cipaction->arg_int == act_avail) parsedb_flags = pdb_parse_available; else parsedb_flags = pdb_parse_binary; parsedb_flags |= pdb_ignore_archives; if (in_force(FORCE_BAD_VERSION)) parsedb_flags |= pdb_lax_version_parser; parsedb(cidir, parsedb_flags, &pkg); if (!pkg->archives) { pkg->archives = nfmalloc(sizeof(*pkg->archives)); pkg->archives->next = NULL; pkg->archives->name = NULL; pkg->archives->msdosname = NULL; pkg->archives->md5sum = NULL; } /* Always nfmalloc. Otherwise, we may overwrite some other field (like * md5sum). */ psize = nfmalloc(30); sprintf(psize, "%jd", (intmax_t)stab.st_size); pkg->archives->size = psize; if (cipaction->arg_int == act_avail) { printf(_("Recorded info about %s from %s.\n"), pkgbin_name(pkg, &pkg->available, pnaw_nonambig), pfilename); pop_cleanup(ehflag_normaltidy); return; } if (pkg->available.arch->type != DPKG_ARCH_ALL && pkg->available.arch->type != DPKG_ARCH_NATIVE && pkg->available.arch->type != DPKG_ARCH_FOREIGN) forcibleerr(FORCE_ARCHITECTURE, _("package architecture (%s) does not match system (%s)"), pkg->available.arch->name, dpkg_arch_get(DPKG_ARCH_NATIVE)->name); clear_deconfigure_queue(); clear_istobes(); if (wanttoinstall(pkg)) { pkg_set_want(pkg, PKG_WANT_INSTALL); } else { pop_cleanup(ehflag_normaltidy); return; } /* Deconfigure other instances from a pkgset if they are not in sync. */ for (otherpkg = &pkg->set->pkg; otherpkg; otherpkg = otherpkg->arch_next) { if (otherpkg == pkg) continue; if (otherpkg->status <= PKG_STAT_HALFCONFIGURED) continue; if (dpkg_version_compare(&pkg->available.version, &otherpkg->installed.version)) enqueue_deconfigure(otherpkg, NULL, PKG_WANT_UNKNOWN); } pkg_check_depcon(pkg, pfilename); ensure_allinstfiles_available(); fsys_hash_init(); trig_file_interests_ensure(); printf(_("Preparing to unpack %s ...\n"), pfilename); if (pkg->status != PKG_STAT_NOTINSTALLED && pkg->status != PKG_STAT_CONFIGFILES) { log_action("upgrade", pkg, &pkg->installed); } else { log_action("install", pkg, &pkg->available); } if (f_noact) { pop_cleanup(ehflag_normaltidy); return; } /* * OK, we're going ahead. */ trig_activate_packageprocessing(pkg); strcpy(cidirrest, TRIGGERSCIFILE); trig_parse_ci(cidir, NULL, trig_cicb_statuschange_activate, pkg, &pkg->available); /* Read the conffiles, and copy the hashes across. */ newconffiles.head = NULL; newconffiles.tail = &newconffiles.head; push_cleanup(cu_fileslist, ~0, 0); strcpy(cidirrest,CONFFILESFILE); deb_parse_conffiles(pkg, cidir, &newconffiles); /* All the old conffiles are marked with a flag, so that we don't delete * them if they seem to disappear completely. */ pkg_conffiles_mark_old(pkg); for (conflictor_iter = conflictors.head; conflictor_iter; conflictor_iter = conflictor_iter->next) pkg_conffiles_mark_old(conflictor_iter->pkg); oldversionstatus= pkg->status; if (oldversionstatus > PKG_STAT_INSTALLED) internerr("package %s state %d is out-of-bounds", pkg_name(pkg, pnaw_always), oldversionstatus); debug(dbg_general,"process_archive oldversionstatus=%s", statusstrings[oldversionstatus]); if (oldversionstatus == PKG_STAT_HALFCONFIGURED || oldversionstatus == PKG_STAT_TRIGGERSAWAITED || oldversionstatus == PKG_STAT_TRIGGERSPENDING || oldversionstatus == PKG_STAT_INSTALLED) { pkg_set_eflags(pkg, PKG_EFLAG_REINSTREQ); pkg_set_status(pkg, PKG_STAT_HALFCONFIGURED); modstatdb_note(pkg); push_cleanup(cu_prermupgrade, ~ehflag_normaltidy, 1, (void *)pkg); maintscript_fallback(pkg, PRERMFILE, "pre-removal", cidir, cidirrest, "upgrade", "failed-upgrade"); pkg_set_status(pkg, PKG_STAT_UNPACKED); oldversionstatus = PKG_STAT_UNPACKED; modstatdb_note(pkg); } pkg_deconfigure_others(pkg); for (conflictor_iter = conflictors.head; conflictor_iter; conflictor_iter = conflictor_iter->next) { struct pkginfo *conflictor = conflictor_iter->pkg; if (!(conflictor->status == PKG_STAT_HALFCONFIGURED || conflictor->status == PKG_STAT_TRIGGERSAWAITED || conflictor->status == PKG_STAT_TRIGGERSPENDING || conflictor->status == PKG_STAT_INSTALLED)) continue; trig_activate_packageprocessing(conflictor); pkg_set_status(conflictor, PKG_STAT_HALFCONFIGURED); modstatdb_note(conflictor); push_cleanup(cu_prerminfavour, ~ehflag_normaltidy, 2, conflictor, pkg); maintscript_installed(conflictor, PRERMFILE, "pre-removal", "remove", "in-favour", pkgbin_name(pkg, &pkg->available, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), NULL); pkg_set_status(conflictor, PKG_STAT_HALFINSTALLED); modstatdb_note(conflictor); } pkg_set_eflags(pkg, PKG_EFLAG_REINSTREQ); if (pkg->status == PKG_STAT_NOTINSTALLED) { pkg->installed.version= pkg->available.version; pkg->installed.multiarch = pkg->available.multiarch; } pkg_set_status(pkg, PKG_STAT_HALFINSTALLED); modstatdb_note(pkg); if (oldversionstatus == PKG_STAT_NOTINSTALLED) { push_cleanup(cu_preinstverynew, ~ehflag_normaltidy, 3,(void*)pkg,(void*)cidir,(void*)cidirrest); maintscript_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest, "install", NULL); } else if (oldversionstatus == PKG_STAT_CONFIGFILES) { push_cleanup(cu_preinstnew, ~ehflag_normaltidy, 3,(void*)pkg,(void*)cidir,(void*)cidirrest); maintscript_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest, "install", versiondescribe(&pkg->installed.version, vdew_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), NULL); } else { push_cleanup(cu_preinstupgrade, ~ehflag_normaltidy, 4,(void*)pkg,(void*)cidir,(void*)cidirrest,(void*)&oldversionstatus); maintscript_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest, "upgrade", versiondescribe(&pkg->installed.version, vdew_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), NULL); } if (oldversionstatus == PKG_STAT_NOTINSTALLED || oldversionstatus == PKG_STAT_CONFIGFILES) { printf(_("Unpacking %s (%s) ...\n"), pkgbin_name(pkg, &pkg->available, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig)); } else { printf(_("Unpacking %s (%s) over (%s) ...\n"), pkgbin_name(pkg, &pkg->available, pnaw_nonambig), versiondescribe(&pkg->available.version, vdew_nonambig), versiondescribe(&pkg->installed.version, vdew_nonambig)); } /* * Now we unpack the archive, backing things up as we go. * For each file, we check to see if it already exists. * There are several possibilities: * * + We are trying to install a non-directory ... * - It doesn't exist. In this case we simply extract it. * - It is a plain file, device, symlink, &c. We do an ‘atomic * overwrite’ using link() and rename(), but leave a backup copy. * Later, when we delete the backup, we remove it from any other * packages' lists. * - It is a directory. In this case it depends on whether we're * trying to install a symlink or something else. * = If we're not trying to install a symlink we move the directory * aside and extract the node. Later, when we recursively remove * the backed-up directory, we remove it from any other packages' * lists. * = If we are trying to install a symlink we do nothing - ie, * dpkg will never replace a directory tree with a symlink. This * is to avoid embarrassing effects such as replacing a directory * tree with a link to a link to the original directory tree. * + We are trying to install a directory ... * - It doesn't exist. We create it with the appropriate modes. * - It exists as a directory or a symlink to one. We do nothing. * - It is a plain file or a symlink (other than to a directory). * We move it aside and create the directory. Later, when we * delete the backup, we remove it from any other packages' lists. * * Install non-dir Install symlink Install dir * Exists not X X X * File/node/symlink LXR LXR BXR * Directory BXR - - * * X: extract file/node/link/directory * LX: atomic overwrite leaving backup * B: ordinary backup * R: later remove from other packages' lists * -: do nothing * * After we've done this we go through the remaining things in the * lists of packages we're trying to remove (including the old * version of the current package). This happens in reverse order, * so that we process files before the directories (or symlinks-to- * directories) containing them. * * + If the thing is a conffile then we leave it alone for the purge * operation. * + Otherwise, there are several possibilities too: * - The listed thing does not exist. We ignore it. * - The listed thing is a directory or a symlink to a directory. * We delete it only if it isn't listed in any other package. * - The listed thing is not a directory, but was part of the package * that was upgraded, we check to make sure the files aren't the * same ones from the old package by checking dev/inode * - The listed thing is not a directory or a symlink to one (ie, * it's a plain file, device, pipe, &c, or a symlink to one, or a * dangling symlink). We delete it. * * The removed packages' list becomes empty (of course, the new * version of the package we're installing will have a new list, * which replaces the old version's list). * * If at any stage we remove a file from a package's list, and the * package isn't one we're already processing, and the package's * list becomes empty as a result, we ‘vanish’ the package. This * means that we run its postrm with the ‘disappear’ argument, and * put the package in the ‘not-installed’ state. If it had any * conffiles, their hashes and ownership will have been transferred * already, so we just ignore those and forget about them from the * point of view of the disappearing package. * * NOTE THAT THE OLD POSTRM IS RUN AFTER THE NEW PREINST, since the * files get replaced ‘as we go’. */ m_pipe(p1); push_cleanup(cu_closepipe, ehflag_bombout, 1, (void *)&p1[0]); pid = subproc_fork(); if (pid == 0) { m_dup2(p1[1],1); close(p1[0]); close(p1[1]); execlp(BACKEND, BACKEND, "--fsys-tarfile", filename, NULL); ohshite(_("unable to execute %s (%s)"), _("package filesystem archive extraction"), BACKEND); } close(p1[1]); p1[1] = -1; newfiles_queue.head = NULL; newfiles_queue.tail = &newfiles_queue.head; tc.newfiles_queue = &newfiles_queue; push_cleanup(cu_fileslist, ~0, 0); tc.pkg= pkg; tc.backendpipe= p1[0]; tc.pkgset_getting_in_sync = pkgset_getting_in_sync(pkg); /* Setup the tar archive. */ tar.err = DPKG_ERROR_OBJECT; tar.ctx = &tc; tar.ops = &tf; rc = tar_extractor(&tar); if (rc) dpkg_error_print(&tar.err, _("corrupted filesystem tarfile in package archive")); if (fd_skip(p1[0], -1, &err) < 0) ohshit(_("cannot zap possible trailing zeros from dpkg-deb: %s"), err.str); close(p1[0]); p1[0] = -1; subproc_reap(pid, BACKEND " --fsys-tarfile", SUBPROC_NOPIPE); tar_deferred_extract(newfiles_queue.head, pkg); if (oldversionstatus == PKG_STAT_HALFINSTALLED || oldversionstatus == PKG_STAT_UNPACKED) { /* Packages that were in ‘installed’ and ‘postinstfailed’ have been * reduced to ‘unpacked’ by now, by the running of the prerm script. */ pkg_set_status(pkg, PKG_STAT_HALFINSTALLED); modstatdb_note(pkg); push_cleanup(cu_postrmupgrade, ~ehflag_normaltidy, 1, (void *)pkg); maintscript_fallback(pkg, POSTRMFILE, "post-removal", cidir, cidirrest, "upgrade", "failed-upgrade"); } /* If anything goes wrong while tidying up it's a bit late to do * anything about it. However, we don't install the new status * info yet, so that a future dpkg installation will put everything * right (we hope). * * If something does go wrong later the ‘conflictor’ package will be * left in the ‘removal_failed’ state. Removing or installing it * will be impossible if it was required because of the conflict with * the package we're installing now and (presumably) the dependency * by other packages. This means that the files it contains in * common with this package will hang around until we successfully * get this package installed, after which point we can trust the * conflicting package's file list, which will have been updated to * remove any files in this package. */ push_checkpoint(~ehflag_bombout, ehflag_normaltidy); /* Now we delete all the files that were in the old version of * the package only, except (old or new) conffiles, which we leave * alone. */ pkg_remove_old_files(pkg, &newfiles_queue, &newconffiles); /* OK, now we can write the updated files-in-this package list, * since we've done away (hopefully) with all the old junk. */ write_filelist_except(pkg, &pkg->available, newfiles_queue.head, 0); /* Trigger interests may have changed. * Firstly we go through the old list of interests deleting them. * Then we go through the new list adding them. */ strcpy(cidirrest, TRIGGERSCIFILE); trig_parse_ci(pkg_infodb_get_file(pkg, &pkg->installed, TRIGGERSCIFILE), trig_cicb_interest_delete, NULL, pkg, &pkg->installed); trig_parse_ci(cidir, trig_cicb_interest_add, NULL, pkg, &pkg->available); trig_file_interests_save(); /* We also install the new maintainer scripts, and any other * cruft that may have come along with the package. First * we go through the existing scripts replacing or removing * them as appropriate; then we go through the new scripts * (any that are left) and install them. */ debug(dbg_general, "process_archive updating info directory"); pkg_infodb_update(pkg, cidir, cidirrest); /* We store now the checksums dynamically computed while unpacking. */ write_filehash_except(pkg, &pkg->available, newfiles_queue.head, 0); /* * Update the status database. * * This involves copying each field across from the ‘available’ * to the ‘installed’ half of the pkg structure. * For some of the fields we have to do a complicated construction * operation; for others we can just copy the value. * We tackle the fields in the order they appear, so that * we don't miss any out :-). * At least we don't have to copy any strings that are referred * to, because these are never modified and never freed. */ pkg_update_fields(pkg, &newconffiles); /* In case this was an architecture cross-grade, the in-core pkgset might * be in an inconsistent state, with two pkginfo entries having the same * architecture, so let's fix that. Note that this does not lose data, * as the pkg.available member parsed from the binary should replace the * to be cleared duplicate in the other instance. */ for (otherpkg = &pkg->set->pkg; otherpkg; otherpkg = otherpkg->arch_next) { if (otherpkg == pkg) continue; if (otherpkg->installed.arch != pkg->installed.arch) continue; if (otherpkg->status != PKG_STAT_NOTINSTALLED) internerr("other package %s instance in state %s instead of not-installed", pkg_name(otherpkg, pnaw_always), pkg_status_name(otherpkg)); pkg_blank(otherpkg); } /* Check for disappearing packages: * We go through all the packages on the system looking for ones * whose files are entirely part of the one we've just unpacked * (and which actually *have* some files!). * * Any that we find are removed - we run the postrm with ‘disappear’ * as an argument, and remove their info/... files and status info. * Conffiles are ignored (the new package had better do something * with them!). */ pkg_disappear_others(pkg); /* Delete files from any other packages' lists. * We have to do this before we claim this package is in any * sane kind of state, as otherwise we might delete by mistake * a file that we overwrote, when we remove the package which * had the version we overwrote. To prevent this we make * sure that we don't claim this package is OK until we * have claimed ‘ownership’ of all its files. */ pkg_remove_files_from_others(pkg, newfiles_queue.head); /* Right, the package we've unpacked is now in a reasonable state. * The only thing that we have left to do with it is remove * backup files, and we can leave the user to fix that if and when * it happens (we leave the reinstall required flag, of course). */ pkg_set_status(pkg, PKG_STAT_UNPACKED); modstatdb_note(pkg); /* Now we delete all the backup files that we made when * extracting the archive - except for files listed as conffiles * in the new package. * This time we count it as an error if something goes wrong. * * Note that we don't ever delete things that were in the old * package as a conffile and don't appear at all in the new. * They stay recorded as obsolete conffiles and will eventually * (if not taken over by another package) be forgotten. */ pkg_remove_backup_files(pkg, newfiles_queue.head); /* OK, we're now fully done with the main package. * This is quite a nice state, so we don't unwind past here. */ pkg_reset_eflags(pkg); modstatdb_note(pkg); push_checkpoint(~ehflag_bombout, ehflag_normaltidy); /* Only the removal of the conflictor left to do. * The files list for the conflictor is still a little inconsistent in-core, * as we have not yet updated the filename->packages mappings; however, * the package->filenames mapping is. */ while (!pkg_queue_is_empty(&conflictors)) { struct pkginfo *conflictor = pkg_queue_pop(&conflictors); /* We need to have the most up-to-date info about which files are * what ... */ ensure_allinstfiles_available(); printf(_("Removing %s (%s), to allow configuration of %s (%s) ...\n"), pkg_name(conflictor, pnaw_nonambig), versiondescribe(&conflictor->installed.version, vdew_nonambig), pkg_name(pkg, pnaw_nonambig), versiondescribe(&pkg->installed.version, vdew_nonambig)); removal_bulk(conflictor); } if (cipaction->arg_int == act_install) enqueue_package_mark_seen(pkg); }