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|
/*
* dpkg - main program for package management
* unpack.c - .deb archive unpacking
*
* Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright © 2006-2015 Guillem Jover <guillem@debian.org>
* Copyright © 2011 Linaro Limited
* Copyright © 2011 Raphaël Hertzog <hertzog@debian.org>
*
* 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 <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <errno.h>
#include <string.h>
#include <time.h>
#include <utime.h>
#include <fcntl.h>
#include <dirent.h>
#include <unistd.h>
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <dpkg/i18n.h>
#include <dpkg/c-ctype.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/pkg.h>
#include <dpkg/pkg-queue.h>
#include <dpkg/path.h>
#include <dpkg/buffer.h>
#include <dpkg/subproc.h>
#include <dpkg/dir.h>
#include <dpkg/tarfn.h>
#include <dpkg/options.h>
#include <dpkg/db-ctrl.h>
#include <dpkg/db-fsys.h>
#include <dpkg/triglib.h>
#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 (!find_command(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 {
varbuf_end_str(&depprobwhy);
notice(_("regarding %s containing %s, pre-dependency problem:\n%s"),
pfilename, pkgbin_name(pkg, &pkg->available, pnaw_nonambig),
depprobwhy.buf);
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 (removing)
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
printf(_("De-configuring %s (%s) ...\n"),
pkg_name(deconpil->pkg, pnaw_nonambig),
versiondescribe(&deconpil->pkg->installed.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(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, 0);
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 == -1) {
debug(dbg_conffdetail, "%s: '%s' conffile dereference error: %s", __func__,
namenode->name, strerror(errno));
namenode->oldhash = EMPTYHASHFLAG;
return;
}
varbuf_reset(&cdrext);
varbuf_add_str(&cdrext, cdr.buf);
varbuf_end_str(&cdrext);
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, &cdrext_state);
varbuf_add_str(&cdrext, DPKGDISTEXT);
varbuf_end_str(&cdrext);
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, &cdrext_state);
varbuf_add_str(&cdrext, DPKGOLDEXT);
varbuf_end_str(&cdrext);
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(&fnamevb, &fname_state);
varbuf_add_str(&fnamevb, usenode->name);
varbuf_end_str(&fnamevb);
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(fnamevb.buf, &oldfs)) {
if (!(errno == ENOENT || errno == ELOOP || errno == ENOTDIR))
warning(_("could not stat old file '%.250s' so not deleting it: %s"),
fnamevb.buf, 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(fnamevb.buf)) {
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", fnamevb.buf);
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_reset(&cfilename);
varbuf_add_str(&cfilename, instdir);
varbuf_add_str(&cfilename, cfile->namenode->name);
varbuf_end_str(&cfilename);
if (lstat(cfilename.buf, &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')"), fnamevb.buf,
sameas->namenode->name, cfile->namenode->name);
sameas = cfile;
debug(dbg_eachfile, "process_archive: not removing %s, "
"since it matches %s", fnamevb.buf, 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(fnamevb.buf, &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 *newdep, *dep;
struct deppossi **newpossilastp, *possi, *newpossi;
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) {
newdep = nfmalloc(sizeof(*newdep));
newdep->up = pkg;
newdep->next = NULL;
newdep->list = NULL;
newpossilastp = &newdep->list;
for (possi = dep->list; possi; possi = possi->next) {
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->obsolete = !!(cfile->namenode->flags & FNNF_OBS_CONFF);
newiconff->remove_on_upgrade = !!(
cfile->namenode->flags & FNNF_RM_CONFF_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;
varbuf_end_str(&depprobwhy);
debug(dbg_veryverbose,"process_archive cannot disappear: %s",
depprobwhy.buf);
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;
varbuf_end_str(&depprobwhy);
debug(dbg_veryverbose,
"process_archive cannot disappear (provides %s): %s",
providecheck->list->ed->name, depprobwhy.buf);
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 : "<local>");
}
} 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(&fnametmpvb, &fname_state);
varbuf_add_str(&fnametmpvb, usenode->name);
varbuf_add_str(&fnametmpvb, DPKGTEMPEXT);
varbuf_end_str(&fnametmpvb);
path_remove_tree(fnametmpvb.buf);
}
}
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_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);
if (dpkg_version_compare(&pkg->available.version,
&pkg->installed.version) >= 0)
/* Upgrade or reinstall. */
maintscript_fallback(pkg, PRERMFILE, "pre-removal", cidir, cidirrest,
"upgrade", "failed-upgrade");
else /* Downgrade => no fallback */
maintscript_installed(pkg, PRERMFILE, "pre-removal",
"upgrade",
versiondescribe(&pkg->available.version,
vdew_nonambig),
NULL);
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();
removal_bulk(conflictor);
}
if (cipaction->arg_int == act_install)
enqueue_package_mark_seen(pkg);
}
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