/*-

* Copyright (c) 2009-2014 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 <errno.h>

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <archive_entry.h>

#include "xbps_api_impl.h"

/*

* Returns true if entry is a configuration file, false otherwise.

*/

int HIDDEN

xbps_entry_is_a_conf_file(xbps_dictionary_t filesd,

const char *entry_pname)

{

xbps_array_t array;

xbps_dictionary_t d;

const char *cffile;

array = xbps_dictionary_get(filesd, "conf_files");

if (xbps_array_count(array) == 0)

return false;

for (unsigned int i = 0; i < xbps_array_count(array); i++) {

d = xbps_array_get(array, i);

xbps_dictionary_get_cstring_nocopy(d, "file", &cffile);

if (strcmp(cffile, entry_pname) == 0)

return true;

}

return false;

}

/*

* Returns 1 if entry should be installed, 0 if don't or -1 on error.

*/

int HIDDEN

xbps_entry_install_conf_file(struct xbps_handle *xhp,

bool mysymlink)

{

xbps_object_t obj, obj2;

xbps_object_iterator_t iter, iter2;

const char *version = NULL, *cffile, *sha256_new = NULL;

char buf[PATH_MAX], sha256_cur[XBPS_SHA256_SIZE];

const char *sha256_orig = NULL;

int rv = 0;

assert(xbps_object_type(binpkg_filesd) == XBPS_TYPE_DICTIONARY);

assert(entry);

assert(entry_pname);

assert(pkgver);

iter = xbps_array_iter_from_dict(binpkg_filesd, "conf_files");

if (iter == NULL)

return -1;

/*

* Get original hash for the file from current

* installed package.

*/

xbps_dbg_printf("%s: processing conf_file %s\n",

pkgver, entry_pname);

if (pkg_filesd == NULL || mysymlink) {

/*

* 1. File exists on disk but it's not managed by the same package.

* 2. File exists on disk as symlink.

* Install it as file.new-<version>.

*/

version = xbps_pkg_version(pkgver);

assert(version);

xbps_dbg_printf("%s: conf_file %s not currently "

"installed, renaming to %s.new-%s\n", pkgver,

entry_pname, entry_pname, version);

snprintf(buf, sizeof(buf), "%s.new-%s", entry_pname, version);

xbps_set_cb_state(xhp, XBPS_STATE_CONFIG_FILE,

0, pkgver, "File `%s' exists, installing configuration file to `%s'.", entry_pname, buf);

archive_entry_copy_pathname(entry, buf);

rv = 1;

goto out;

}

iter2 = xbps_array_iter_from_dict(pkg_filesd, "conf_files");

if (iter2 != NULL) {

while ((obj2 = xbps_object_iterator_next(iter2))) {

xbps_dictionary_get_cstring_nocopy(obj2,

"file", &cffile);

snprintf(buf, sizeof(buf), ".%s", cffile);

if (strcmp(entry_pname, buf) == 0) {

xbps_dictionary_get_cstring_nocopy(obj2, "sha256", &sha256_orig);

break;

}

}

xbps_object_iterator_release(iter2);

}

/*

* First case: original hash not found, install new file.

*/

if (sha256_orig == NULL) {

xbps_dbg_printf("%s: conf_file %s not installed\n",

pkgver, entry_pname);

rv = 1;

goto out;

}

/*

* Compare original, installed and new hash for current file.

*/

while ((obj = xbps_object_iterator_next(iter))) {

xbps_dictionary_get_cstring_nocopy(obj, "file", &cffile);

snprintf(buf, sizeof(buf), ".%s", cffile);

if (strcmp(entry_pname, buf)) {

continue;

}

if (!xbps_file_sha256(sha256_cur, sizeof sha256_cur, buf)) {

if (errno == ENOENT) {

/*

* File not installed, install new one.

*/

xbps_dbg_printf("%s: conf_file %s not "

"installed\n", pkgver, entry_pname);

rv = 1;

break;

} else {

rv = -1;

break;

}

}

xbps_dictionary_get_cstring_nocopy(obj, "sha256", &sha256_new);

/*

* Orig = X, Curr = X, New = X

*

* Keep file as is (no changes).

*/

if ((strcmp(sha256_orig, sha256_cur) == 0) &&

(strcmp(sha256_orig, sha256_new) == 0) &&

(strcmp(sha256_cur, sha256_new) == 0)) {

xbps_dbg_printf("%s: conf_file %s orig = X, "

"cur = X, new = X\n", pkgver, entry_pname);

rv = 0;

break;

/*

* Orig = X, Curr = X, New = Y

*

* Install new file (installed file hasn't been modified) if

* configuration option keepconfig is NOT set.

*/

} else if ((strcmp(sha256_orig, sha256_cur) == 0) &&

(strcmp(sha256_orig, sha256_new)) &&

(strcmp(sha256_cur, sha256_new)) &&

(!(xhp->flags & XBPS_FLAG_KEEP_CONFIG))) {

xbps_set_cb_state(xhp, XBPS_STATE_CONFIG_FILE,

0, pkgver,

"Updating configuration file `%s' provided "

"by `%s'.", cffile, pkgver);

rv = 1;

break;

/*

* Orig = X, Curr = Y, New = X

*

* Keep installed file as is because it has been modified,

* but new package doesn't contain new changes compared

* to the original version.

*/

} else if ((strcmp(sha256_orig, sha256_new) == 0) &&

(strcmp(sha256_cur, sha256_new)) &&

(strcmp(sha256_orig, sha256_cur))) {

xbps_set_cb_state(xhp, XBPS_STATE_CONFIG_FILE,

0, pkgver,

"Keeping modified configuration file `%s'.",

cffile);

rv = 0;

break;

/*

* Orig = X, Curr = Y, New = Y

*

* Keep file as is because changes made are compatible

* with new version.

*/

} else if ((strcmp(sha256_cur, sha256_new) == 0) &&

(strcmp(sha256_orig, sha256_new)) &&

(strcmp(sha256_orig, sha256_cur))) {

xbps_dbg_printf("%s: conf_file %s orig = X, "

"cur = Y, new = Y\n", pkgver, entry_pname);

rv = 0;

break;

/*

* Orig = X, Curr = Y, New = Z

* or

* Orig = X, Curr = X, New = Y if keepconf is set

*

* Install new file as <file>.new-<version>

*/

} else if (((strcmp(sha256_orig, sha256_cur)) &&

(strcmp(sha256_cur, sha256_new)) &&

(strcmp(sha256_orig, sha256_new))) ||

(xhp->flags & XBPS_FLAG_KEEP_CONFIG)) {

version = xbps_pkg_version(pkgver);

assert(version);

snprintf(buf, sizeof(buf), ".%s.new-%s", cffile, version);

xbps_set_cb_state(xhp, XBPS_STATE_CONFIG_FILE,

0, pkgver, "File `%s' exists, installing configuration file to `%s'.", cffile, buf);

archive_entry_copy_pathname(entry, buf);

rv = 1;

break;

}

}

out:

xbps_object_iterator_release(iter);

xbps_dbg_printf("%s: conf_file %s returned %d\n",

pkgver, entry_pname, rv);

return rv;

}