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/*
* dpkg - main program for package management
* cleanup.c - cleanup functions, used when we need to unwind
*
* Copyright © 1995 Ian Jackson <ijackson@chiark.greenend.org.uk>
* Copyright © 2007-2015 Guillem Jover <guillem@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 <errno.h>
#include <string.h>
#include <time.h>
#include <utime.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <dpkg/i18n.h>
#include <dpkg/dpkg.h>
#include <dpkg/dpkg-db.h>
#include <dpkg/pkg.h>
#include <dpkg/path.h>
#include <dpkg/options.h>
#include <dpkg/db-fsys.h>
#include "main.h"
#include "archives.h"
int cleanup_pkg_failed=0, cleanup_conflictor_failed=0;
/**
* Something went wrong and we're undoing.
*
* We have the following possible situations for non-conffiles:
* «pathname».dpkg-tmp exists - in this case we want to remove
* «pathname» if it exists and replace it with «pathname».dpkg-tmp.
* This undoes the backup operation.
* «pathname».dpkg-tmp does not exist - «pathname» may be on the disk,
* as a new file which didn't fail, remove it if it is.
*
* In both cases, we also make sure we delete «pathname».dpkg-new in
* case that's still hanging around.
*
* For conffiles, we simply delete «pathname».dpkg-new. For these,
* «pathname».dpkg-tmp shouldn't exist, as we don't make a backup
* at this stage. Just to be on the safe side, though, we don't
* look for it.
*/
void cu_installnew(int argc, void **argv) {
struct fsys_namenode *namenode = argv[0];
struct stat stab;
cleanup_pkg_failed++; cleanup_conflictor_failed++;
debug(dbg_eachfile, "cu_installnew '%s' flags=%o",
namenode->name, namenode->flags);
setupfnamevbs(namenode->name);
if (!(namenode->flags & FNNF_NEW_CONFF) && !lstat(fnametmpvb.buf,&stab)) {
/* OK, «pathname».dpkg-tmp exists. Remove «pathname» and
* restore «pathname».dpkg-tmp ... */
if (namenode->flags & FNNF_NO_ATOMIC_OVERWRITE) {
/* If we can't do an atomic overwrite we have to delete first any
* link to the new version we may have created. */
debug(dbg_eachfiledetail,"cu_installnew restoring nonatomic");
if (secure_remove(fnamevb.buf) && errno != ENOENT && errno != ENOTDIR)
ohshite(_("unable to remove newly-installed version of '%.250s' to allow"
" reinstallation of backup copy"),namenode->name);
} else {
debug(dbg_eachfiledetail,"cu_installnew restoring atomic");
}
/* Either we can do an atomic restore, or we've made room: */
if (rename(fnametmpvb.buf,fnamevb.buf))
ohshite(_("unable to restore backup version of '%.250s'"), namenode->name);
/* If «pathname».dpkg-tmp was still a hard link to «pathname», then the
* atomic rename did nothing, so we make sure to remove the backup. */
else if (unlink(fnametmpvb.buf) && errno != ENOENT)
ohshite(_("unable to remove backup copy of '%.250s'"), namenode->name);
} else if (namenode->flags & FNNF_PLACED_ON_DISK) {
debug(dbg_eachfiledetail,"cu_installnew removing new file");
if (secure_remove(fnamevb.buf) && errno != ENOENT && errno != ENOTDIR)
ohshite(_("unable to remove newly-installed version of '%.250s'"),
namenode->name);
} else {
debug(dbg_eachfiledetail,"cu_installnew not restoring");
}
/* Whatever, we delete «pathname».dpkg-new now, if it still exists. */
if (secure_remove(fnamenewvb.buf) && errno != ENOENT && errno != ENOTDIR)
ohshite(_("unable to remove newly-extracted version of '%.250s'"),
namenode->name);
cleanup_pkg_failed--; cleanup_conflictor_failed--;
}
void cu_prermupgrade(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
if (cleanup_pkg_failed++) return;
maintscript_postinst(pkg, "abort-upgrade",
versiondescribe(&pkg->available.version, vdew_nonambig),
NULL);
pkg_clear_eflags(pkg, PKG_EFLAG_REINSTREQ);
post_postinst_tasks(pkg, PKG_STAT_INSTALLED);
cleanup_pkg_failed--;
}
/*
* Also has conflictor in argv[1] and infavour in argv[2].
* conflictor may be NULL if deconfigure was due to Breaks or multi-arch
* instance sync.
*/
void ok_prermdeconfigure(int argc, void **argv) {
struct pkginfo *deconf= (struct pkginfo*)argv[0];
if (cipaction->arg_int == act_install)
enqueue_package(deconf);
}
/*
* conflictor may be NULL if deconfigure was due to Breaks or multi-arch
* instance sync.
*/
void cu_prermdeconfigure(int argc, void **argv) {
struct pkginfo *deconf= (struct pkginfo*)argv[0];
struct pkginfo *conflictor = (struct pkginfo *)argv[1];
struct pkginfo *infavour= (struct pkginfo*)argv[2];
if (conflictor) {
maintscript_postinst(deconf, "abort-deconfigure",
"in-favour",
pkgbin_name(infavour, &infavour->available,
pnaw_nonambig),
versiondescribe(&infavour->available.version,
vdew_nonambig),
"removing",
pkg_name(conflictor, pnaw_nonambig),
versiondescribe(&conflictor->installed.version,
vdew_nonambig),
NULL);
} else {
maintscript_postinst(deconf, "abort-deconfigure",
"in-favour",
pkgbin_name(infavour, &infavour->available,
pnaw_nonambig),
versiondescribe(&infavour->available.version,
vdew_nonambig),
NULL);
}
post_postinst_tasks(deconf, PKG_STAT_INSTALLED);
}
void cu_prerminfavour(int argc, void **argv) {
struct pkginfo *conflictor= (struct pkginfo*)argv[0];
struct pkginfo *infavour= (struct pkginfo*)argv[1];
if (cleanup_conflictor_failed++) return;
maintscript_postinst(conflictor, "abort-remove",
"in-favour",
pkgbin_name(infavour, &infavour->available,
pnaw_nonambig),
versiondescribe(&infavour->available.version,
vdew_nonambig),
NULL);
pkg_clear_eflags(conflictor, PKG_EFLAG_REINSTREQ);
post_postinst_tasks(conflictor, PKG_STAT_INSTALLED);
cleanup_conflictor_failed--;
}
void cu_preinstverynew(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
char *cidir= (char*)argv[1];
char *cidirrest= (char*)argv[2];
if (cleanup_pkg_failed++) return;
maintscript_new(pkg, POSTRMFILE, "post-removal", cidir, cidirrest,
"abort-install", NULL);
pkg_set_status(pkg, PKG_STAT_NOTINSTALLED);
pkg_clear_eflags(pkg, PKG_EFLAG_REINSTREQ);
pkgbin_blank(&pkg->installed);
modstatdb_note(pkg);
cleanup_pkg_failed--;
}
void cu_preinstnew(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
char *cidir= (char*)argv[1];
char *cidirrest= (char*)argv[2];
if (cleanup_pkg_failed++) return;
maintscript_new(pkg, POSTRMFILE, "post-removal", cidir, cidirrest,
"abort-install",
versiondescribe(&pkg->installed.version, vdew_nonambig),
versiondescribe(&pkg->available.version, vdew_nonambig),
NULL);
pkg_set_status(pkg, PKG_STAT_CONFIGFILES);
pkg_clear_eflags(pkg, PKG_EFLAG_REINSTREQ);
modstatdb_note(pkg);
cleanup_pkg_failed--;
}
void cu_preinstupgrade(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
char *cidir= (char*)argv[1];
char *cidirrest= (char*)argv[2];
enum pkgstatus *oldstatusp= (enum pkgstatus*)argv[3];
if (cleanup_pkg_failed++) return;
maintscript_new(pkg, POSTRMFILE, "post-removal", cidir, cidirrest,
"abort-upgrade",
versiondescribe(&pkg->installed.version, vdew_nonambig),
versiondescribe(&pkg->available.version, vdew_nonambig),
NULL);
pkg_set_status(pkg, *oldstatusp);
pkg_clear_eflags(pkg, PKG_EFLAG_REINSTREQ);
modstatdb_note(pkg);
cleanup_pkg_failed--;
}
void cu_postrmupgrade(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
if (cleanup_pkg_failed++) return;
maintscript_installed(pkg, PREINSTFILE, "pre-installation",
"abort-upgrade",
versiondescribe(&pkg->available.version, vdew_nonambig),
NULL);
cleanup_pkg_failed--;
}
void cu_prermremove(int argc, void **argv) {
struct pkginfo *pkg= (struct pkginfo*)argv[0];
enum pkgstatus *oldpkgstatus= (enum pkgstatus*)argv[1];
if (cleanup_pkg_failed++) return;
maintscript_postinst(pkg, "abort-remove", NULL);
pkg_clear_eflags(pkg, PKG_EFLAG_REINSTREQ);
post_postinst_tasks(pkg, *oldpkgstatus);
cleanup_pkg_failed--;
}
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