void-packages/lib/remove.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 <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <limits.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <dirent.h>
#include <xbps_api.h>
struct rm_cbarg {
const char *destdir;
int flags;
};
static int remove_pkg_files(prop_object_t, void *, bool *);
int
xbps_unregister_pkg(const char *pkgname)
{
char *plist;
int rv = 0;
assert(pkgname != NULL);
plist = xbps_append_full_path(true, NULL, XBPS_REGPKGDB);
if (plist == NULL)
return EINVAL;
if (!xbps_remove_pkg_dict_from_file(pkgname, plist))
rv = errno;
free(plist);
return rv;
}
static int
xbps_remove_binary_pkg_meta(const char *pkgname, const char *destdir, int flags)
{
struct dirent *dp;
DIR *dirp;
char metadir[PATH_MAX - 1], path[PATH_MAX - 1];
int rv = 0;
assert(pkgname != NULL);
if (destdir == NULL)
destdir = "";
(void)snprintf(metadir, sizeof(metadir), "%s%s/metadata/%s",
destdir, XBPS_META_PATH, pkgname);
dirp = opendir(metadir);
if (dirp == NULL)
return errno;
while ((dp = readdir(dirp)) != NULL) {
if ((strcmp(dp->d_name, ".") == 0) ||
(strcmp(dp->d_name, "..") == 0))
continue;
if (snprintf(path, sizeof(path), "%s%s/metadata/%s/%s",
destdir, XBPS_META_PATH, pkgname, dp->d_name) < 0) {
(void)closedir(dirp);
return -1;
}
if ((rv = unlink(path)) == -1) {
if (flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove %s (%s)\n",
pkgname, strerror(errno));
}
(void)memset(&path, 0, sizeof(path));
}
(void)closedir(dirp);
rv = rmdir(metadir);
return rv;
}
static int
remove_pkg_files(prop_object_t obj, void *arg, bool *loop_done)
{
prop_bool_t bobj;
struct rm_cbarg *rmcb = arg;
const char *file = NULL, *sha256, *type;
char *path = NULL;
int rv = 0;
(void)loop_done;
if (!prop_dictionary_get_cstring_nocopy(obj, "file", &file))
return EINVAL;
path = xbps_append_full_path(false, rmcb->destdir, file);
if (path == NULL)
return EINVAL;
if (!prop_dictionary_get_cstring_nocopy(obj, "type", &type)) {
free(path);
return EINVAL;
}
if (strcmp(type, "file") == 0) {
prop_dictionary_get_cstring_nocopy(obj, "sha256", &sha256);
rv = xbps_check_file_hash(path, sha256);
if (rv != 0 && rv != ERANGE) {
free(path);
return rv;
}
bobj = prop_dictionary_get(obj, "conf_file");
if (bobj != NULL) {
/*
* If hash is the same than the one provided by
* package, that means the file hasn't been changed
* and therefore can be removed. Otherwise keep it.
*/
if (rv == ERANGE)
goto out;
}
if (rv == ERANGE) {
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: SHA256 doesn't match for "
"file %s, ignoring...\n", file);
goto out;
}
if ((rv = remove(path)) == -1) {
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove file %s (%s)\n",
file, strerror(errno));
goto out;
}
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("Removed file: %s\n", file);
goto out;
} else if (strcmp(type, "dir") == 0) {
if ((bobj = prop_dictionary_get(obj, "keep")) != NULL) {
/* Skip permanent directory. */
return 0;
}
if ((rv = rmdir(path)) == -1) {
if (errno == ENOTEMPTY)
goto out;
if (rmcb->flags & XBPS_UNPACK_VERBOSE) {
printf("WARNING: can't remove "
"directory %s (%s)\n", file,
strerror(errno));
goto out;
}
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("Removed directory: %s\n", file);
}
} else if (strcmp(type, "link") == 0) {
if ((rv = remove(path)) == -1) {
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("WARNING: can't remove link %s (%s)\n",
file, strerror(errno));
goto out;
}
if (rmcb->flags & XBPS_UNPACK_VERBOSE)
printf("Removed link: %s\n", file);
}
out:
free(path);
return 0;
}
int
xbps_remove_binary_pkg(const char *pkgname, const char *destdir, int flags)
{
prop_dictionary_t dict;
struct rm_cbarg rmcbarg;
char path[PATH_MAX - 1], *buf;
int fd, rv = 0;
size_t len = 0;
bool prepostf = false;
assert(pkgname != NULL);
if (destdir) {
if (chdir(destdir) == -1)
return errno;
} else {
if (chdir("/") == -1)
return errno;
destdir = "";
}
/* Check if pkg is installed */
if (xbps_check_is_installed_pkgname(pkgname) == false)
return ENOENT;
/*
* This length is '%s%s/metadata/%s/REMOVE' + NULL.
*/
len = strlen(XBPS_META_PATH) + strlen(destdir) + strlen(pkgname) + 19;
buf = malloc(len);
if (buf == NULL)
return errno;
if (snprintf(buf, len, "%s%s/metadata/%s/REMOVE",
destdir, XBPS_META_PATH, pkgname) < 0) {
free(buf);
return -1;
}
/*
* Find out if the REMOVE file exists.
*/
if ((fd = open(buf, O_RDONLY)) == -1) {
if (errno != ENOENT) {
free(buf);
return errno;
}
} else {
/*
* Run the pre remove action.
*/
(void)close(fd);
prepostf = true;
(void)printf("\n");
(void)fflush(stdout);
rv = xbps_file_exec(buf, destdir, "pre", pkgname, NULL);
if (rv != 0) {
printf("%s: prerm action target error (%s)\n", pkgname,
strerror(errno));
free(buf);
return rv;
}
}
/*
* Iterate over the pkg file list dictionary and remove all
* files/dirs associated.
*/
(void)snprintf(path, sizeof(path), "%s%s/metadata/%s/files.plist",
destdir, XBPS_META_PATH, pkgname);
dict = prop_dictionary_internalize_from_file(path);
if (dict == NULL) {
free(buf);
return errno;
}
rmcbarg.destdir = destdir;
rmcbarg.flags = flags;
rv = xbps_callback_array_iter_in_dict(dict, "filelist",
remove_pkg_files, (void *)&rmcbarg);
if (rv != 0) {
free(buf);
prop_object_release(dict);
return rv;
}
prop_object_release(dict);
/*
* Run the post remove action if REMOVE file is there.
*/
if (prepostf) {
if ((rv = xbps_file_exec(buf, destdir, "post",
pkgname, NULL)) != 0) {
printf("%s: postrm action target error (%s)\n",
pkgname, strerror(errno));
free(buf);
return rv;
}
}
free(buf);
/*
* Update the required_by array of all required dependencies.
*/
rv = xbps_requiredby_pkg_remove(pkgname);
if (rv != 0)
return rv;
/*
* Unregister pkg from database.
*/
rv = xbps_unregister_pkg(pkgname);
if (rv != 0)
return rv;
/*
* Remove pkg metadata directory.
*/
return xbps_remove_binary_pkg_meta(pkgname, destdir, flags);
}