/* * 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, * 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 dpkg; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "filesdb.h" #include "main.h" static void checkforremoval(struct pkginfo *pkgtoremove, struct pkginfo *pkgdepcheck, /* may be virtual pkg */ int *rokp, struct varbuf *raemsgs) { struct deppossi *possi; struct pkginfo *depender; int before, ok; for (possi= pkgdepcheck->installed.depended; possi; possi= possi->nextrev) { 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'\n",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) raemsgs->used= before; /* Don't burble about reasons for deferral */ 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 != 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; } assert(pkg->installed.valid); 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 == 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) { varbuffree(&raemsgs); pkg->clientdata->istobe= itb_remove; add_to_queue(pkg); return; } else if (rok == 0) { sincenothing= 0; varbufaddc(&raemsgs,0); fprintf(stderr, _("dpkg: dependency problems prevent removal of %s:\n%s"), pkg->name, raemsgs.buf); ohshit(_("dependency problems - not removing")); } else if (raemsgs.used) { varbufaddc(&raemsgs,0); fprintf(stderr, _("dpkg: %s: dependency problems, but removing anyway as you requested:\n%s"), pkg->name, raemsgs.buf); } varbuffree(&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); pkg->status= stat_unpacked; /* Will turn into halfinstalled soon ... */ } 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_files( struct pkginfo *pkg, int *out_foundpostrm) { int before; int infodirbaseused; struct reversefilelistiter rlistit; struct fileinlist *leftover; struct filenamenode *namenode; static struct varbuf fnvb; DIR *dsd; struct dirent *de; 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); varbufreset(&fnvb); varbufaddstr(&fnvb,instdir); varbufaddstr(&fnvb, usenode->name); before= fnvb.used; varbufaddstr(&fnvb,DPKGTEMPEXT); varbufaddc(&fnvb,0); debug(dbg_eachfiledetail, "removal_bulk cleaning temp `%s'", fnvb.buf); ensure_pathname_nonexisting(fnvb.buf); fnvb.used= before; varbufaddstr(&fnvb,DPKGNEWEXT); varbufaddc(&fnvb,0); debug(dbg_eachfiledetail, "removal_bulk cleaning new `%s'", fnvb.buf); ensure_pathname_nonexisting(fnvb.buf); fnvb.used= before; varbufaddc(&fnvb,0); 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 (hasdirectoryconffiles(namenode,pkg)) { push_leftover(&leftover,namenode); continue; } if (isdirectoryinuse(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; } if (errno != ENOTDIR) ohshite(_("cannot remove `%.250s'"),fnvb.buf); debug(dbg_eachfiledetail, "removal_bulk unlinking `%s'", fnvb.buf); { /* * If file to remove is a device or s[gu]id, change its mode * so that a malicious user cannot use it even if it's linked * to another file */ struct stat stat_buf; if (lstat(fnvb.buf,&stat_buf)==0) { if (S_ISCHR(stat_buf.st_mode) || S_ISBLK(stat_buf.st_mode)) { chmod(fnvb.buf,0); } if (stat_buf.st_mode & (S_ISUID|S_ISGID)) { chmod(fnvb.buf,stat_buf.st_mode & ~(S_ISUID|S_ISGID)); } } } if (unlink(fnvb.buf)) ohshite(_("cannot remove file `%.250s'"),fnvb.buf); } write_filelist_except(pkg,leftover,0); maintainer_script_installed(pkg, POSTRMFILE, "post-removal", "remove", NULL); varbufreset(&fnvb); varbufaddstr(&fnvb,admindir); varbufaddstr(&fnvb,"/" INFODIR); infodirbaseused= fnvb.used; varbufaddc(&fnvb,0); dsd= opendir(fnvb.buf); if (!dsd) ohshite(_("cannot read info directory")); push_cleanup(cu_closedir, ~0, NULL, 0, 1, (void *)dsd); *out_foundpostrm= 0; debug(dbg_general, "removal_bulk cleaning info directory"); while ((de = readdir(dsd)) != NULL) { char *p; debug(dbg_veryverbose, "removal_bulk info file `%s'", de->d_name); if (de->d_name[0] == '.') continue; p= strrchr(de->d_name,'.'); if (!p) continue; if (strlen(pkg->name) != (size_t)(p-de->d_name) || strncmp(de->d_name,pkg->name,p-de->d_name)) continue; debug(dbg_stupidlyverbose, "removal_bulk info this pkg"); /* We need the postrm and list files for --purge. */ if (!strcmp(p+1,LISTFILE)) continue; if (!strcmp(p+1,POSTRMFILE)) { *out_foundpostrm=1; continue; } debug(dbg_stupidlyverbose, "removal_bulk info not postrm or list"); fnvb.used= infodirbaseused; varbufaddstr(&fnvb,de->d_name); varbufaddc(&fnvb,0); if (unlink(fnvb.buf)) ohshite(_("unable to delete control info file `%.250s'"),fnvb.buf); debug(dbg_scripts, "removal_bulk info unlinked %s",fnvb.buf); } pop_cleanup(ehflag_normaltidy); /* closedir */ pkg->status= stat_configfiles; pkg->installed.essential= 0; 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; 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); varbufreset(&fnvb); varbufaddstr(&fnvb,instdir); varbufaddstr(&fnvb, usenode->name); varbufaddc(&fnvb,0); 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 (hasdirectoryconffiles(namenode,pkg)) { push_leftover(&leftover,namenode); continue; } if (isdirectoryinuse(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; } if (errno != ENOTDIR) ohshite(_("cannot remove `%.250s'"),fnvb.buf); 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); ensure_packagefiles_available(pkg); /* We may have modified this above. */ /* 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\n", 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); continue; } varbufreset(&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-1; 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'; varbufreset(&removevb); varbufaddstr(&removevb,fnvb.buf); varbufaddc(&removevb,'/'); removevbbase= removevb.used; varbufaddc(&removevb,0); 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: removevb.used= removevbbase; varbufaddstr(&removevb,de->d_name); varbufaddc(&removevb,0); 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 */ } pkg->installed.conffiles = NULL; modstatdb_note(pkg); maintainer_script_installed(pkg, POSTRMFILE, "post-removal", "purge", NULL); } void removal_bulk(struct pkginfo *pkg) { /* 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. */ int pkgnameused; int foundpostrm= 0; const char *postrmfilename; debug(dbg_general,"removal_bulk package %s",pkg->name); if (pkg->status == stat_halfinstalled || pkg->status == stat_unpacked) { removal_bulk_remove_files(pkg, &foundpostrm); } else { struct stat stab; postrmfilename= pkgadminfile(pkg,POSTRMFILE); if (!lstat(postrmfilename,&stab)) foundpostrm= 1; else if (errno == ENOENT) foundpostrm= 0; else ohshite(_("unable to check existence of `%.250s'"),postrmfilename); } 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); } if (pkg->want == want_purge) { /* ie, either of the two branches above. */ static struct varbuf fnvb; /* retry empty directories, and warn on any leftovers that aren't */ removal_bulk_remove_leftover_dirs(pkg); varbufreset(&fnvb); varbufaddstr(&fnvb,admindir); varbufaddstr(&fnvb,"/" INFODIR); varbufaddstr(&fnvb,pkg->name); pkgnameused= fnvb.used; varbufaddstr(&fnvb,"." LISTFILE); varbufaddc(&fnvb,0); debug(dbg_general, "removal_bulk purge done, removing list `%s'",fnvb.buf); if (unlink(fnvb.buf) && errno != ENOENT) ohshite(_("cannot remove old files list")); fnvb.used= pkgnameused; varbufaddstr(&fnvb,"." POSTRMFILE); varbufaddc(&fnvb,0); debug(dbg_general, "removal_bulk purge done, removing postrm `%s'",fnvb.buf); if (unlink(fnvb.buf) && 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. */ blankpackageperfile(&pkg->installed); } pkg->eflag = eflag_ok; modstatdb_note(pkg); debug(dbg_general, "removal done"); }