/**
* Read a filename from the file descriptor and create a file_info struct.
*
* @return A file_info struct or NULL if there is nothing to read.
*/
static struct file_info *
file_info_get(const char *root, int fd)
{
static struct varbuf fn = VARBUF_INIT;
struct file_info *fi;
size_t root_len;
varbuf_reset(&fn);
root_len = varbuf_printf(&fn, "%s/", root);
while (1) {
int res;
varbuf_grow(&fn, 1);
res = fd_read(fd, (fn.buf + fn.used), 1);
if (res < 0)
return NULL;
if (res == 0) /* EOF -> parent died. */
return NULL;
if (fn.buf[fn.used] == '\0')
break;
varbuf_trunc(&fn, fn.used + 1);
if (fn.used >= MAXFILENAME)
ohshit(_("file name '%.50s...' is too long"), fn.buf + root_len);
}
fi = file_info_new(fn.buf + root_len);
if (lstat(fn.buf, &(fi->st)) != 0)
ohshite(_("unable to stat file name '%.250s'"), fn.buf);
return fi;
}
void setupfnamevbs(const char *filename) {
varbuf_trunc(&fnamevb, fnameidlu);
varbufaddstr(&fnamevb,filename);
varbufaddc(&fnamevb,0);
varbuf_trunc(&fnametmpvb, fnameidlu);
varbufaddstr(&fnametmpvb,filename);
varbufaddstr(&fnametmpvb,DPKGTEMPEXT);
varbufaddc(&fnametmpvb,0);
varbuf_trunc(&fnamenewvb, fnameidlu);
varbufaddstr(&fnamenewvb,filename);
varbufaddstr(&fnamenewvb,DPKGNEWEXT);
varbufaddc(&fnamenewvb,0);
debug(dbg_eachfiledetail, "setupvnamevbs main=`%s' tmp=`%s' new=`%s'",
fnamevb.buf, fnametmpvb.buf, fnamenewvb.buf);
}
static void
test_varbuf_trunc(void)
{
struct varbuf vb;
varbuf_init(&vb, 50);
/* Test that we truncate (grow). */
varbuf_trunc(&vb, 20);
test_pass(vb.used == 20);
test_pass(vb.size >= 50);
/* Test that we truncate (shrink). */
varbuf_trunc(&vb, 10);
test_pass(vb.used == 10);
test_pass(vb.size >= 50);
varbuf_destroy(&vb);
}
static void
test_varbuf_end_str(void)
{
struct varbuf vb;
varbuf_init(&vb, 10);
varbuf_add_buf(&vb, "1234567890X", 11);
test_pass(vb.used == 11);
test_pass(vb.size >= vb.used);
test_mem(vb.buf, ==, "1234567890X", 11);
varbuf_trunc(&vb, 10);
varbuf_end_str(&vb);
test_pass(vb.used == 10);
test_pass(vb.size >= vb.used + 1);
test_pass(vb.buf[10] == '\0');
test_str(vb.buf, ==, "1234567890");
varbuf_destroy(&vb);
}
void
varbuf_rollback(struct varbuf *v, struct varbuf_state *vs)
{
varbuf_trunc(v, vs->used);
}
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 char *cidir = NULL;
static struct fileinlist *newconffiles, *newfileslist;
static enum pkgstatus oldversionstatus;
static struct varbuf depprobwhy;
static struct tarcontext tc;
int r, i;
pid_t pid;
struct pkgiterator *it;
struct pkginfo *pkg, *otherpkg;
char *cidirrest, *p;
char conffilenamebuf[MAXCONFFILENAME];
char *psize;
const char *pfilename;
struct fileinlist *newconff, **newconffileslastp;
struct fileinlist *cfile;
struct reversefilelistiter rlistit;
struct conffile *searchconff, **iconffileslastp, *newiconff;
struct dependency *dsearch, *newdeplist, **newdeplistlastp;
struct dependency *newdep, *dep, *providecheck;
struct deppossi *psearch, **newpossilastp, *possi, *newpossi, *pdep;
FILE *conff;
struct filenamenode *namenode;
struct stat stab, oldfs;
struct pkg_deconf_list *deconpil, *deconpiltemp;
struct pkginfo *fixbytrigaw;
cleanup_pkg_failed= cleanup_conflictor_failed= 0;
pfilename = summarize_filename(filename);
if (stat(filename,&stab)) ohshite(_("cannot access archive"));
/* 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, NULL, 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_wait_check(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);
parsedb(cidir, pdb_parse_binary | pdb_ignorefiles | parsedb_force_flags(),
&pkg);
if (!pkg->files) {
pkg->files= nfmalloc(sizeof(struct filedetails));
pkg->files->next = NULL;
pkg->files->name = pkg->files->msdosname = pkg->files->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->files->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 != arch_all &&
pkg->available.arch->type != arch_native)
forcibleerr(fc_architecture,
_("package architecture (%s) does not match system (%s)"),
pkg->available.arch->name, dpkg_arch_get(arch_native)->name);
for (deconpil= deconfigure;
deconpil;
deconpil= deconpiltemp) {
deconpiltemp= deconpil->next;
free(deconpil);
}
deconfigure = NULL;
clear_istobes();
if (!wanttoinstall(pkg)) {
pop_cleanup(ehflag_normaltidy);
return;
}
/* Check if anything is installed that we conflict with, or not installed
* that we need. */
pkg->clientdata->istobe= itb_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);
} else {
varbuf_end_str(&depprobwhy);
fprintf(stderr, _("dpkg: 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);
}
ensure_allinstfiles_available();
filesdbinit();
trig_file_interests_ensure();
if (pkg->status != stat_notinstalled && pkg->status != stat_configfiles) {
printf(_("Preparing to replace %s %s (using %s) ...\n"),
pkg_name(pkg, pnaw_nonambig),
versiondescribe(&pkg->installed.version,vdew_nonambig),
pfilename);
log_action("upgrade", pkg, &pkg->installed);
} else {
printf(_("Unpacking %s (from %s) ...\n"),
pkgbin_name(pkg, &pkg->available, pnaw_nonambig), pfilename);
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 = NULL;
newconffileslastp = &newconffiles;
push_cleanup(cu_fileslist, ~0, NULL, 0, 0);
strcpy(cidirrest,CONFFILESFILE);
conff= fopen(cidir,"r");
if (conff) {
push_cleanup(cu_closestream, ehflag_bombout, NULL, 0, 1, (void *)conff);
while (fgets(conffilenamebuf,MAXCONFFILENAME-2,conff)) {
struct filepackages_iterator *iter;
p= conffilenamebuf + strlen(conffilenamebuf);
assert(p != conffilenamebuf);
if (p[-1] != '\n')
ohshit(_("name of conffile (starting `%.250s') is too long (>%d characters)"),
conffilenamebuf, MAXCONFFILENAME);
while (p > conffilenamebuf && isspace(p[-1])) --p;
if (p == conffilenamebuf) continue;
*p = '\0';
namenode= findnamenode(conffilenamebuf, 0);
namenode->oldhash= NEWCONFFILEFLAG;
newconff= newconff_append(&newconffileslastp, 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're installing now.
* The ‘conffiles’ data in the status file is ignored when a
* package isn't 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 = filepackages_iter_new(newconff->namenode);
while ((otherpkg = filepackages_iter_next(iter))) {
debug(dbg_conffdetail,
"process_archive conffile `%s' in package %s - conff ?",
newconff->namenode->name, pkg_name(otherpkg, pnaw_nonambig));
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_nonambig),
searchconff->name);
if (searchconff) {
debug(dbg_conff,
"process_archive conffile `%s' package=%s %s hash=%s",
newconff->namenode->name, pkg_name(otherpkg, pnaw_nonambig),
otherpkg == pkg ? "same" : "different!",
searchconff->hash);
if (otherpkg == pkg)
break;
}
}
filepackages_iter_free(iter);
if (searchconff) {
newconff->namenode->oldhash= searchconff->hash;
/* We don't copy ‘obsolete’; it's not obsolete in the new package. */
} else {
debug(dbg_conff,"process_archive conffile `%s' no package, no hash",
newconff->namenode->name);
}
newconff->namenode->flags |= fnnf_new_conff;
}
if (ferror(conff)) ohshite(_("read error in %.250s"),cidir);
pop_cleanup(ehflag_normaltidy); /* conff = fopen() */
if (fclose(conff)) ohshite(_("error closing %.250s"),cidir);
} else {
if (errno != ENOENT) ohshite(_("error trying to open %.250s"),cidir);
}
/* All the old conffiles are marked with a flag, so that we don't delete
* them if they seem to disappear completely. */
oldconffsetflags(pkg->installed.conffiles);
for (i = 0 ; i < cflict_index ; i++) {
oldconffsetflags(conflictor[i]->installed.conffiles);
}
oldversionstatus= pkg->status;
assert(oldversionstatus <= stat_installed);
debug(dbg_general,"process_archive oldversionstatus=%s",
statusstrings[oldversionstatus]);
if (oldversionstatus == stat_halfconfigured ||
oldversionstatus == stat_triggersawaited ||
oldversionstatus == stat_triggerspending ||
oldversionstatus == stat_installed) {
pkg_set_eflags(pkg, eflag_reinstreq);
pkg_set_status(pkg, stat_halfconfigured);
modstatdb_note(pkg);
push_cleanup(cu_prermupgrade, ~ehflag_normaltidy, NULL, 0, 1, (void *)pkg);
if (versioncompare(&pkg->available.version,
&pkg->installed.version) >= 0) /* Upgrade or reinstall */
maintainer_script_alternative(pkg, PRERMFILE, "pre-removal", cidir, cidirrest,
"upgrade", "failed-upgrade");
else /* Downgrade => no fallback */
maintainer_script_installed(pkg, PRERMFILE, "pre-removal", "upgrade",
versiondescribe(&pkg->available.version,
vdew_nonambig), NULL);
pkg_set_status(pkg, stat_unpacked);
oldversionstatus= stat_unpacked;
modstatdb_note(pkg);
}
for (deconpil= deconfigure; deconpil; deconpil= deconpil->next) {
struct pkginfo *removing = deconpil->pkg_removal;
if (removing)
printf(_("De-configuring %s, to allow removal of %s ...\n"),
pkg_name(deconpil->pkg, pnaw_nonambig),
pkg_name(removing, pnaw_nonambig));
else
printf(_("De-configuring %s ...\n"),
pkg_name(deconpil->pkg, pnaw_nonambig));
trig_activate_packageprocessing(deconpil->pkg);
pkg_set_status(deconpil->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(cu_prermdeconfigure, ~ehflag_normaltidy,
ok_prermdeconfigure, ehflag_normaltidy,
3, (void*)deconpil->pkg, (void*)removing, (void*)pkg);
if (removing) {
maintainer_script_installed(deconpil->pkg, PRERMFILE, "pre-removal",
"deconfigure", "in-favour", pkg->set->name,
versiondescribe(&pkg->available.version,
vdew_nonambig),
"removing", removing->set->name,
versiondescribe(&removing->installed.version,
vdew_nonambig),
NULL);
} else {
maintainer_script_installed(deconpil->pkg, PRERMFILE, "pre-removal",
"deconfigure", "in-favour", pkg->set->name,
versiondescribe(&pkg->available.version,
vdew_nonambig),
NULL);
}
}
for (i = 0 ; i < cflict_index; i++) {
if (!(conflictor[i]->status == stat_halfconfigured ||
conflictor[i]->status == stat_triggersawaited ||
conflictor[i]->status == stat_triggerspending ||
conflictor[i]->status == stat_installed)) continue;
trig_activate_packageprocessing(conflictor[i]);
pkg_set_status(conflictor[i], stat_halfconfigured);
modstatdb_note(conflictor[i]);
push_cleanup(cu_prerminfavour, ~ehflag_normaltidy, NULL, 0,
2,(void*)conflictor[i],(void*)pkg);
maintainer_script_installed(conflictor[i], PRERMFILE, "pre-removal",
"remove", "in-favour", pkg->set->name,
versiondescribe(&pkg->available.version,
vdew_nonambig),
NULL);
pkg_set_status(conflictor[i], stat_halfinstalled);
modstatdb_note(conflictor[i]);
}
pkg_set_eflags(pkg, eflag_reinstreq);
if (pkg->status == stat_notinstalled)
pkg->installed.version= pkg->available.version;
pkg_set_status(pkg, stat_halfinstalled);
modstatdb_note(pkg);
if (oldversionstatus == stat_notinstalled) {
push_cleanup(cu_preinstverynew, ~ehflag_normaltidy, NULL, 0,
3,(void*)pkg,(void*)cidir,(void*)cidirrest);
maintainer_script_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest,
"install", NULL);
} else if (oldversionstatus == stat_configfiles) {
push_cleanup(cu_preinstnew, ~ehflag_normaltidy, NULL, 0,
3,(void*)pkg,(void*)cidir,(void*)cidirrest);
maintainer_script_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest,
"install", versiondescribe(&pkg->installed.version,
vdew_nonambig),
NULL);
} else {
push_cleanup(cu_preinstupgrade, ~ehflag_normaltidy, NULL, 0,
4,(void*)pkg,(void*)cidir,(void*)cidirrest,(void*)&oldversionstatus);
maintainer_script_new(pkg, PREINSTFILE, "pre-installation", cidir, cidirrest,
"upgrade", versiondescribe(&pkg->installed.version,
vdew_nonambig),
NULL);
printf(_("Unpacking replacement %.250s ...\n"),
pkgbin_name(pkg, &pkg->available, pnaw_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, NULL, 0, 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;
newfileslist = NULL;
tc.newfilesp = &newfileslist;
push_cleanup(cu_fileslist, ~0, NULL, 0, 0);
tc.pkg= pkg;
tc.backendpipe= p1[0];
r = tar_extractor(&tc, &tf);
if (r) {
if (errno) {
ohshite(_("error reading dpkg-deb tar output"));
} else {
ohshit(_("corrupted filesystem tarfile - corrupted package archive"));
}
}
fd_skip(p1[0], -1, _("dpkg-deb: zap possible trailing zeros"));
close(p1[0]);
p1[0] = -1;
subproc_wait_check(pid, BACKEND " --fsys-tarfile", PROCPIPE);
tar_deferred_extract(newfileslist, pkg);
if (oldversionstatus == stat_halfinstalled || oldversionstatus == 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, stat_halfinstalled);
modstatdb_note(pkg);
push_cleanup(cu_postrmupgrade, ~ehflag_normaltidy, NULL, 0, 1, (void *)pkg);
maintainer_script_alternative(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. */
reversefilelist_init(&rlistit,pkg->clientdata->files);
while ((namenode= reversefilelist_next(&rlistit))) {
struct filenamenode *usenode;
if ((namenode->flags & fnnf_new_conff) ||
(namenode->flags & fnnf_new_inarchive))
continue;
usenode = namenodetouse(namenode, pkg, &pkg->installed);
trig_file_activate(usenode, pkg);
varbuf_trunc(&fnamevb, fnameidlu);
varbuf_add_str(&fnamevb, usenode->name);
varbuf_end_str(&fnamevb);
if (!stat(namenode->name,&stab) && S_ISDIR(stab.st_mode)) {
debug(dbg_eachfiledetail, "process_archive: %s is a directory",
namenode->name);
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)) {
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 fileinlist *sameas = NULL;
static struct stat empty_stat;
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= newfileslist; 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->filestat) {
struct stat tmp_stat;
varbuf_reset(&cfilename);
varbuf_add_str(&cfilename, instdir);
varbuf_add_char(&cfilename, '/');
varbuf_add_str(&cfilename, cfile->namenode->name);
varbuf_end_str(&cfilename);
if (lstat(cfilename.buf, &tmp_stat) == 0) {
cfile->namenode->filestat = nfmalloc(sizeof(struct stat));
memcpy(cfile->namenode->filestat, &tmp_stat, sizeof(struct stat));
} else {
if (!(errno == ENOENT || errno == ELOOP || errno == ENOTDIR))
ohshite(_("unable to stat other new file `%.250s'"),
cfile->namenode->name);
cfile->namenode->filestat = &empty_stat;
continue;
}
}
if (cfile->namenode->filestat == &empty_stat)
continue;
if (oldfs.st_dev == cfile->namenode->filestat->st_dev &&
oldfs.st_ino == cfile->namenode->filestat->st_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)) {
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;
newconff_append(&newconffileslastp, namenode);
addfiletolist(&tc, namenode);
}
continue;
}
if (sameas)
continue;
if (secure_unlink_statted(fnamevb.buf, &oldfs)) {
warning(_("unable to securely remove old file '%.250s': %s"),
namenode->name, strerror(errno));
}
} /* !S_ISDIR */
}
/* 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, newfileslist, 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(pkgadminfile(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);
/*
* 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.
*/
/* 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(struct dependency));
newdep->up= pkg;
newdep->next = NULL;
newdep->list = NULL;
newpossilastp = &newdep->list;
for (possi= dep->list; possi; possi= possi->next) {
newpossi= nfmalloc(sizeof(struct deppossi));
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 != dvr_none)
newpossi->version= possi->version;
else
blankversion(&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.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.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; cfile; cfile= cfile->next) {
newiconff= nfmalloc(sizeof(struct conffile));
newiconff->next = NULL;
newiconff->name= nfstrsave(cfile->namenode->name);
newiconff->hash= nfstrsave(cfile->namenode->oldhash);
newiconff->obsolete= !!(cfile->namenode->flags & fnnf_obs_conff);
*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;
/* 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!). */
it = pkg_db_iter_new();
while ((otherpkg = pkg_db_iter_next_pkg(it)) != NULL) {
ensure_package_clientdata(otherpkg);
if (otherpkg == pkg ||
otherpkg->status == stat_notinstalled ||
otherpkg->status == stat_configfiles ||
otherpkg->clientdata->istobe == itb_remove ||
!otherpkg->clientdata->files) continue;
debug(dbg_veryverbose, "process_archive checking disappearance %s",
pkg_name(otherpkg, pnaw_nonambig));
assert(otherpkg->clientdata->istobe == itb_normal ||
otherpkg->clientdata->istobe == itb_deconfigure);
for (cfile= otherpkg->clientdata->files;
cfile && !strcmp(cfile->namenode->name,"/.");
cfile= cfile->next);
if (!cfile) {
debug(dbg_stupidlyverbose, "process_archive no non-root, no disappear");
continue;
}
for (cfile= otherpkg->clientdata->files;
cfile && !filesavespackage(cfile,otherpkg,pkg);
cfile= cfile->next);
if (cfile) continue;
/* So dependency things will give right answers ... */
otherpkg->clientdata->istobe= itb_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= itb_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_db_iter_free(it);
/* 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. */
for (cfile= newfileslist; cfile; cfile= cfile->next) {
struct filepackages_iterator *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 = filepackages_iter_new(cfile->namenode);
while ((otherpkg = filepackages_iter_next(iter))) {
debug(dbg_eachfiledetail, "process_archive ... found in %s",
pkg_name(otherpkg, pnaw_nonambig));
/* If !fileslistvalid then it's one of the disappeared packages above
* and we don't bother with it here, clearly. */
if (otherpkg == pkg || !otherpkg->clientdata->fileslistvalid)
continue;
if (otherpkg->set == divpkgset) {
debug(dbg_eachfiledetail, "process_archive ... diverted, skipping");
continue;
}
/* Found one. We delete remove 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->clientdata->files, fnnf_elide_other_lists);
ensure_package_clientdata(otherpkg);
debug(dbg_veryverbose, "process_archive overwrote from %s",
pkg_name(otherpkg, pnaw_nonambig));
}
filepackages_iter_free(iter);
}
/* 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, 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. */
for (cfile= newfileslist; cfile; cfile= cfile->next) {
if (cfile->namenode->flags & fnnf_new_conff) continue;
varbuf_trunc(&fnametmpvb, fnameidlu);
varbuf_add_str(&fnametmpvb,
namenodetouse(cfile->namenode, pkg, &pkg->installed)->name);
varbuf_add_str(&fnametmpvb, DPKGTEMPEXT);
varbuf_end_str(&fnametmpvb);
ensure_pathname_nonexisting(fnametmpvb.buf);
}
/* 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. */
for (i = 0 ; i < cflict_index ; i++) {
/* We need to have the most up-to-date info about which files are
* what ... */
ensure_allinstfiles_available();
removal_bulk(conflictor[i]);
}
if (cipaction->arg_int == act_install)
add_to_queue(pkg);
}
int
tarobject(void *ctx, struct tar_entry *ti)
{
static struct varbuf conffderefn, hardlinkfn, symlinkfn;
static int fd;
const char *usename;
struct filenamenode *usenode;
struct filenamenode *linknode;
struct conffile *conff;
struct tarcontext *tc = ctx;
bool existingdirectory, keepexisting;
int statr;
ssize_t r;
struct stat stab, stabtmp;
char databuf[TARBLKSZ];
struct file_stat *st;
struct fileinlist *nifd, **oldnifd;
struct pkginfo *divpkg, *otherpkg;
ensureobstackinit();
/* Append to list of files.
* The trailing ‘/’ put on the end of names in tarfiles has already
* been stripped by tar_extractor(). */
oldnifd= tc->newfilesp;
nifd= addfiletolist(tc, findnamenode(ti->name, 0));
nifd->namenode->flags |= fnnf_new_inarchive;
debug(dbg_eachfile,
"tarobject ti->name='%s' mode=%lo owner=%u.%u type=%d(%c)"
" ti->linkname='%s' namenode='%s' flags=%o instead='%s'",
ti->name, (long)ti->stat.mode,
(unsigned)ti->stat.uid, (unsigned)ti->stat.gid,
ti->type,
ti->type >= '0' && ti->type <= '6' ? "-hlcbdp"[ti->type - '0'] : '?',
ti->linkname,
nifd->namenode->name, nifd->namenode->flags,
nifd->namenode->divert && nifd->namenode->divert->useinstead
? nifd->namenode->divert->useinstead->name : "<none>");
if (nifd->namenode->divert && nifd->namenode->divert->camefrom) {
divpkg= nifd->namenode->divert->pkg;
if (divpkg) {
forcibleerr(fc_overwritediverted,
_("trying to overwrite `%.250s', which is the "
"diverted version of `%.250s' (package: %.100s)"),
nifd->namenode->name, nifd->namenode->divert->camefrom->name,
divpkg->name);
} else {
forcibleerr(fc_overwritediverted,
_("trying to overwrite `%.250s', which is the "
"diverted version of `%.250s'"),
nifd->namenode->name, nifd->namenode->divert->camefrom->name);
}
}
if (nifd->namenode->statoverride)
st = nifd->namenode->statoverride;
else
st = &ti->stat;
usenode = namenodetouse(nifd->namenode, tc->pkg);
usename = usenode->name + 1; /* Skip the leading '/'. */
trig_file_activate(usenode, tc->pkg);
if (nifd->namenode->flags & fnnf_new_conff) {
/* If it's a conffile we have to extract it next to the installed
* version (i.e. we do the usual link-following). */
if (conffderef(tc->pkg, &conffderefn, usename))
usename= conffderefn.buf;
debug(dbg_conff,"tarobject fnnf_new_conff deref=`%s'",usename);
}
setupfnamevbs(usename);
statr= lstat(fnamevb.buf,&stab);
if (statr) {
/* The lstat failed. */
if (errno != ENOENT && errno != ENOTDIR)
ohshite(_("unable to stat `%.255s' (which I was about to install)"),
ti->name);
/* OK, so it doesn't exist.
* However, it's possible that we were in the middle of some other
* backup/restore operation and were rudely interrupted.
* So, we see if we have .dpkg-tmp, and if so we restore it. */
if (rename(fnametmpvb.buf,fnamevb.buf)) {
if (errno != ENOENT && errno != ENOTDIR)
ohshite(_("unable to clean up mess surrounding `%.255s' before "
"installing another version"), ti->name);
debug(dbg_eachfiledetail,"tarobject nonexistent");
} else {
debug(dbg_eachfiledetail,"tarobject restored tmp to main");
statr= lstat(fnamevb.buf,&stab);
if (statr) ohshite(_("unable to stat restored `%.255s' before installing"
" another version"), ti->name);
}
} else {
debug(dbg_eachfiledetail,"tarobject already exists");
}
/* Check to see if it's a directory or link to one and we don't need to
* do anything. This has to be done now so that we don't die due to
* a file overwriting conflict. */
existingdirectory = false;
switch (ti->type) {
case tar_filetype_symlink:
/* If it's already an existing directory, do nothing. */
if (!statr && S_ISDIR(stab.st_mode)) {
debug(dbg_eachfiledetail, "tarobject symlink exists as directory");
existingdirectory = true;
} else if (!statr && S_ISLNK(stab.st_mode)) {
if (linktosameexistingdir(ti, fnamevb.buf, &symlinkfn))
existingdirectory = true;
}
break;
case tar_filetype_dir:
/* If it's already an existing directory, do nothing. */
if (!stat(fnamevb.buf,&stabtmp) && S_ISDIR(stabtmp.st_mode)) {
debug(dbg_eachfiledetail, "tarobject directory exists");
existingdirectory = true;
}
break;
case tar_filetype_file:
case tar_filetype_chardev:
case tar_filetype_blockdev:
case tar_filetype_fifo:
case tar_filetype_hardlink:
break;
default:
ohshit(_("archive contained object `%.255s' of unknown type 0x%x"),
ti->name, ti->type);
}
keepexisting = false;
if (!existingdirectory) {
struct filepackages_iterator *iter;
iter = filepackages_iter_new(nifd->namenode);
while ((otherpkg = filepackages_iter_next(iter))) {
if (otherpkg == tc->pkg)
continue;
debug(dbg_eachfile, "tarobject ... found in %s", otherpkg->name);
if (nifd->namenode->divert && nifd->namenode->divert->useinstead) {
/* Right, so we may be diverting this file. This makes the conflict
* OK iff one of us is the diverting package (we don't need to
* check for both being the diverting package, obviously). */
divpkg = nifd->namenode->divert->pkg;
debug(dbg_eachfile, "tarobject ... diverted, divpkg=%s",
divpkg ? divpkg->name : "<none>");
if (otherpkg == divpkg || tc->pkg == divpkg)
continue;
}
/* Nope? Hmm, file conflict, perhaps. Check Replaces. */
switch (otherpkg->clientdata->replacingfilesandsaid) {
case 2:
keepexisting = true;
case 1:
continue;
}
/* Is the package with the conflicting file in the “config files only”
* state? If so it must be a config file and we can silenty take it
* over. */
if (otherpkg->status == stat_configfiles)
continue;
/* Perhaps we're removing a conflicting package? */
if (otherpkg->clientdata->istobe == itb_remove)
continue;
/* Is the file an obsolete conffile in the other package
* and a conffile in the new package? */
if ((nifd->namenode->flags & fnnf_new_conff) &&
!statr && S_ISREG(stab.st_mode)) {
for (conff = otherpkg->installed.conffiles;
conff;
conff = conff->next) {
if (!conff->obsolete)
continue;
if (stat(conff->name, &stabtmp))
if (errno == ENOENT || errno == ENOTDIR || errno == ELOOP)
continue;
if (stabtmp.st_dev == stab.st_dev &&
stabtmp.st_ino == stab.st_ino)
break;
}
if (conff) {
debug(dbg_eachfiledetail, "tarobject other's obsolete conffile");
/* process_archive() will have copied its hash already. */
continue;
}
}
if (does_replace(tc->pkg, &tc->pkg->available,
otherpkg, &otherpkg->installed)) {
printf(_("Replacing files in old package %s ...\n"),otherpkg->name);
otherpkg->clientdata->replacingfilesandsaid = 1;
} else if (does_replace(otherpkg, &otherpkg->installed,
tc->pkg, &tc->pkg->available)) {
printf(_("Replaced by files in installed package %s ...\n"),
otherpkg->name);
otherpkg->clientdata->replacingfilesandsaid = 2;
nifd->namenode->flags &= ~fnnf_new_inarchive;
keepexisting = true;
} else {
if (!statr && S_ISDIR(stab.st_mode)) {
forcibleerr(fc_overwritedir,
_("trying to overwrite directory '%.250s' "
"in package %.250s %.250s with nondirectory"),
nifd->namenode->name, otherpkg->name,
versiondescribe(&otherpkg->installed.version,
vdew_nonambig));
} else {
/* At this point we are replacing something without a Replaces.
* If the new object is a directory and the previous object does
* not exist assume it's also a directory and don't complain. */
if (!(statr && ti->type == tar_filetype_dir))
forcibleerr(fc_overwrite,
_("trying to overwrite '%.250s', "
"which is also in package %.250s %.250s"),
nifd->namenode->name, otherpkg->name,
versiondescribe(&otherpkg->installed.version,
vdew_nonambig));
}
}
}
filepackages_iter_free(iter);
}
if (keepexisting) {
remove_file_from_list(tc, ti, oldnifd, nifd);
tarfile_skip_one_forward(tc, ti);
return 0;
}
if (filter_should_skip(ti)) {
nifd->namenode->flags &= ~fnnf_new_inarchive;
nifd->namenode->flags |= fnnf_filtered;
tarfile_skip_one_forward(tc, ti);
return 0;
}
if (existingdirectory)
return 0;
/* Now, at this stage we want to make sure neither of .dpkg-new and
* .dpkg-tmp are hanging around. */
ensure_pathname_nonexisting(fnamenewvb.buf);
ensure_pathname_nonexisting(fnametmpvb.buf);
/* Now we start to do things that we need to be able to undo
* if something goes wrong. Watch out for the CLEANUP comments to
* keep an eye on what's installed on the disk at each point. */
push_cleanup(cu_installnew, ~ehflag_normaltidy, NULL, 0, 1, (void *)nifd);
/*
* CLEANUP: Now we either have the old file on the disk, or not, in
* its original filename.
*/
/* Extract whatever it is as .dpkg-new ... */
switch (ti->type) {
case tar_filetype_file:
/* We create the file with mode 0 to make sure nobody can do anything with
* it until we apply the proper mode, which might be a statoverride. */
fd= open(fnamenewvb.buf, (O_CREAT|O_EXCL|O_WRONLY), 0);
if (fd < 0)
ohshite(_("unable to create `%.255s' (while processing `%.255s')"),
fnamenewvb.buf, ti->name);
push_cleanup(cu_closefd, ehflag_bombout, NULL, 0, 1, &fd);
debug(dbg_eachfiledetail, "tarobject file open size=%lu",
(unsigned long)ti->size);
{ char fnamebuf[256];
fd_fd_copy(tc->backendpipe, fd, ti->size,
_("backend dpkg-deb during `%.255s'"),
path_quote_filename(fnamebuf, ti->name, 256));
}
r = ti->size % TARBLKSZ;
if (r > 0)
if (safe_read(tc->backendpipe, databuf, TARBLKSZ - r) == -1)
ohshite(_("error reading from dpkg-deb pipe"));
fd_writeback_init(fd);
if (nifd->namenode->statoverride)
debug(dbg_eachfile, "tarobject ... stat override, uid=%d, gid=%d, mode=%04o",
nifd->namenode->statoverride->uid,
nifd->namenode->statoverride->gid,
nifd->namenode->statoverride->mode);
if (fchown(fd, st->uid, st->gid))
ohshite(_("error setting ownership of `%.255s'"), ti->name);
if (fchmod(fd, st->mode & ~S_IFMT))
ohshite(_("error setting permissions of `%.255s'"), ti->name);
/* Postpone the fsync, to try to avoid massive I/O degradation. */
if (!fc_unsafe_io)
nifd->namenode->flags |= fnnf_deferred_fsync;
pop_cleanup(ehflag_normaltidy); /* fd = open(fnamenewvb.buf) */
if (close(fd))
ohshite(_("error closing/writing `%.255s'"), ti->name);
newtarobject_utime(fnamenewvb.buf, st);
break;
case tar_filetype_fifo:
if (mkfifo(fnamenewvb.buf,0))
ohshite(_("error creating pipe `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject fifo");
newtarobject_allmodes(fnamenewvb.buf, st);
break;
case tar_filetype_chardev:
if (mknod(fnamenewvb.buf, S_IFCHR, ti->dev))
ohshite(_("error creating device `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject chardev");
newtarobject_allmodes(fnamenewvb.buf, st);
break;
case tar_filetype_blockdev:
if (mknod(fnamenewvb.buf, S_IFBLK, ti->dev))
ohshite(_("error creating device `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject blockdev");
newtarobject_allmodes(fnamenewvb.buf, st);
break;
case tar_filetype_hardlink:
varbufreset(&hardlinkfn);
varbufaddstr(&hardlinkfn,instdir); varbufaddc(&hardlinkfn,'/');
varbufaddstr(&hardlinkfn, ti->linkname);
linknode = findnamenode(ti->linkname, 0);
if (linknode->flags & fnnf_deferred_rename)
varbufaddstr(&hardlinkfn, DPKGNEWEXT);
varbufaddc(&hardlinkfn, '\0');
if (link(hardlinkfn.buf,fnamenewvb.buf))
ohshite(_("error creating hard link `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject hardlink");
newtarobject_allmodes(fnamenewvb.buf, st);
break;
case tar_filetype_symlink:
/* We've already cheched for an existing directory. */
if (symlink(ti->linkname, fnamenewvb.buf))
ohshite(_("error creating symbolic link `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject symlink creating");
if (lchown(fnamenewvb.buf, st->uid, st->gid))
ohshite(_("error setting ownership of symlink `%.255s'"), ti->name);
break;
case tar_filetype_dir:
/* We've already checked for an existing directory. */
if (mkdir(fnamenewvb.buf,0))
ohshite(_("error creating directory `%.255s'"), ti->name);
debug(dbg_eachfiledetail, "tarobject directory creating");
newtarobject_allmodes(fnamenewvb.buf, st);
break;
default:
internerr("unknown tar type '%d', but already checked", ti->type);
}
set_selinux_path_context(fnamevb.buf, fnamenewvb.buf, st->mode);
/*
* CLEANUP: Now we have extracted the new object in .dpkg-new (or,
* if the file already exists as a directory and we were trying to
* extract a directory or symlink, we returned earlier, so we don't
* need to worry about that here).
*
* The old file is still in the original filename,
*/
/* First, check to see if it's a conffile. If so we don't install
* it now - we leave it in .dpkg-new for --configure to take care of. */
if (nifd->namenode->flags & fnnf_new_conff) {
debug(dbg_conffdetail,"tarobject conffile extracted");
nifd->namenode->flags |= fnnf_elide_other_lists;
return 0;
}
/* Now we move the old file out of the way, the backup file will
* be deleted later. */
if (statr) {
/* Don't try to back it up if it didn't exist. */
debug(dbg_eachfiledetail,"tarobject new - no backup");
} else {
if (ti->type == tar_filetype_dir || S_ISDIR(stab.st_mode)) {
/* One of the two is a directory - can't do atomic install. */
debug(dbg_eachfiledetail,"tarobject directory, nonatomic");
nifd->namenode->flags |= fnnf_no_atomic_overwrite;
if (rename(fnamevb.buf,fnametmpvb.buf))
ohshite(_("unable to move aside `%.255s' to install new version"),
ti->name);
} else if (S_ISLNK(stab.st_mode)) {
/* We can't make a symlink with two hardlinks, so we'll have to
* copy it. (Pretend that making a copy of a symlink is the same
* as linking to it.) */
varbufreset(&symlinkfn);
varbuf_grow(&symlinkfn, stab.st_size + 1);
r = readlink(fnamevb.buf, symlinkfn.buf, symlinkfn.size);
if (r < 0)
ohshite(_("unable to read link `%.255s'"), ti->name);
assert(r == stab.st_size);
varbuf_trunc(&symlinkfn, r);
varbufaddc(&symlinkfn, '\0');
if (symlink(symlinkfn.buf,fnametmpvb.buf))
ohshite(_("unable to make backup symlink for `%.255s'"), ti->name);
if (lchown(fnametmpvb.buf,stab.st_uid,stab.st_gid))
ohshite(_("unable to chown backup symlink for `%.255s'"), ti->name);
set_selinux_path_context(fnamevb.buf, fnametmpvb.buf, stab.st_mode);
} else {
debug(dbg_eachfiledetail,"tarobject nondirectory, `link' backup");
if (link(fnamevb.buf,fnametmpvb.buf))
ohshite(_("unable to make backup link of `%.255s' before installing new version"),
ti->name);
}
}
/*
* CLEANUP: Now the old file is in .dpkg-tmp, and the new file is still
* in .dpkg-new.
*/
if (ti->type == tar_filetype_file || ti->type == tar_filetype_symlink) {
nifd->namenode->flags |= fnnf_deferred_rename;
debug(dbg_eachfiledetail, "tarobject done and installation deferred");
} else {
if (rename(fnamenewvb.buf, fnamevb.buf))
ohshite(_("unable to install new version of `%.255s'"), ti->name);
/*
* CLEANUP: Now the new file is in the destination file, and the
* old file is in .dpkg-tmp to be cleaned up later. We now need
* to take a different attitude to cleanup, because we need to
* remove the new file.
*/
nifd->namenode->flags |= fnnf_placed_on_disk;
nifd->namenode->flags |= fnnf_elide_other_lists;
debug(dbg_eachfiledetail, "tarobject done and installed");
}
return 0;
}
