xbps/lib/purge.c

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/*-
* Copyright (c) 2009 Juan Romero Pardines.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include <xbps_api.h>
static int remove_pkg_metadata(const char *);
int SYMEXPORT
xbps_purge_all_pkgs(void)
{
prop_dictionary_t d;
prop_object_t obj;
prop_object_iterator_t iter;
const char *pkgname;
int rv = 0;
pkg_state_t state = 0;
d = xbps_prepare_regpkgdb_dict();
if (d == NULL)
return ENODEV;
iter = xbps_get_array_iter_from_dict(d, "packages");
if (iter == NULL)
return ENOENT;
while ((obj = prop_object_iterator_next(iter)) != NULL) {
prop_dictionary_get_cstring_nocopy(obj, "pkgname", &pkgname);
if ((rv = xbps_get_pkg_state_dictionary(obj, &state)) != 0)
break;
if (state != XBPS_PKG_STATE_CONFIG_FILES)
continue;
if ((rv = xbps_purge_pkg(pkgname, false)) != 0)
break;
}
prop_object_iterator_release(iter);
return rv;
}
/*
* Purge a package that is currently in "config-files" state.
* This removes configuration files if they weren't modified,
* removes metadata files and fully unregisters the package.
*/
int SYMEXPORT
xbps_purge_pkg(const char *pkgname, bool check_state)
{
prop_dictionary_t dict;
prop_array_t array;
prop_object_t obj;
prop_object_iterator_t iter;
const char *rootdir, *file, *sha256;
char *path;
int rv = 0, flags;
pkg_state_t state = 0;
assert(pkgname != NULL);
rootdir = xbps_get_rootdir();
flags = xbps_get_flags();
if (check_state) {
/*
* Skip packages that aren't in "config-files" state.
*/
if ((rv = xbps_get_pkg_state_installed(pkgname, &state)) != 0)
return rv;
if (state != XBPS_PKG_STATE_CONFIG_FILES)
return 0;
}
/*
* Iterate over the pkg file list dictionary and remove all
* unmodified configuration files.
*/
path = xbps_xasprintf("%s/%s/metadata/%s/%s",
rootdir, XBPS_META_PATH, pkgname, XBPS_PKGFILES);
if (path == NULL)
return errno;
dict = prop_dictionary_internalize_from_file(path);
if (dict == NULL) {
free(path);
return errno;
}
free(path);
array = prop_dictionary_get(dict, "conf_files");
if (array == NULL) {
goto out;
} else if (prop_object_type(array) != PROP_TYPE_ARRAY) {
prop_object_release(dict);
return EINVAL;
} else if (prop_array_count(array) == 0) {
goto out;
}
iter = xbps_get_array_iter_from_dict(dict, "conf_files");
if (iter == NULL)
return EINVAL;
while ((obj = prop_object_iterator_next(iter))) {
if (!prop_dictionary_get_cstring_nocopy(obj, "file", &file)) {
prop_object_iterator_release(iter);
prop_object_release(dict);
return EINVAL;
}
path = xbps_xasprintf("%s/%s", rootdir, file);
if (path == NULL) {
prop_object_iterator_release(iter);
prop_object_release(dict);
return EINVAL;
}
prop_dictionary_get_cstring_nocopy(obj, "sha256", &sha256);
rv = xbps_check_file_hash(path, sha256);
if (rv == ENOENT) {
printf("Configuration file %s doesn't exist!\n", file);
free(path);
continue;
} else if (rv == ERANGE) {
if (flags & XBPS_FLAG_VERBOSE)
printf("Configuration file %s has been "
"modified, preserving...\n", file);
free(path);
continue;
} else if (rv != 0 && rv != ERANGE) {
free(path);
prop_object_iterator_release(iter);
prop_object_release(dict);
return rv;
}
if ((rv = remove(path)) == -1) {
if (flags & XBPS_FLAG_VERBOSE)
printf("WARNING: can't remove %s (%s)\n",
file, strerror(errno));
free(path);
continue;
}
if (flags & XBPS_FLAG_VERBOSE)
printf("Removed configuration file %s\n", file);
free(path);
}
prop_object_iterator_release(iter);
out:
prop_object_release(dict);
if ((rv = remove_pkg_metadata(pkgname)) == 0) {
if ((rv = xbps_unregister_pkg(pkgname)) == 0)
printf("Package %s has been purged successfully.\n",
pkgname);
}
return rv;
}
static int
remove_pkg_metadata(const char *pkgname)
{
struct dirent *dp;
DIR *dirp;
const char *rootdir;
char *metadir, *path;
int flags = 0, rv = 0;
assert(pkgname != NULL);
rootdir = xbps_get_rootdir();
flags = xbps_get_flags();
metadir = xbps_xasprintf("%s/%s/metadata/%s", rootdir,
XBPS_META_PATH, pkgname);
if (metadir == NULL)
return errno;
dirp = opendir(metadir);
if (dirp == NULL) {
free(metadir);
return errno;
}
while ((dp = readdir(dirp)) != NULL) {
if ((strcmp(dp->d_name, ".") == 0) ||
(strcmp(dp->d_name, "..") == 0))
continue;
path = xbps_xasprintf("%s/%s", metadir, dp->d_name);
if (path == NULL) {
(void)closedir(dirp);
free(metadir);
return -1;
}
if ((rv = unlink(path)) == -1) {
if (flags & XBPS_FLAG_VERBOSE)
printf("WARNING: can't remove %s (%s)\n",
pkgname, strerror(errno));
}
free(path);
}
(void)closedir(dirp);
rv = rmdir(metadir);
free(metadir);
return rv;
}