opkg-lede/libopkg/conffile.c

/* conffile.c - the opkg package management system

   Carl D. Worth

   Copyright (C) 2001 University of Southern California

   This program 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, or (at
   your option) any later version.

   This program 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.
*/

#include <stdio.h>
#include <stdlib.h>

#include "opkg_message.h"
#include "conffile.h"
#include "file_util.h"
#include "sprintf_alloc.h"
#include "opkg_conf.h"

int conffile_init(conffile_t * conffile, const char *file_name,
		  const char *md5sum)
{
	return nv_pair_init(conffile, file_name, md5sum);
}

void conffile_deinit(conffile_t * conffile)
{
	nv_pair_deinit(conffile);
}

int conffile_has_been_modified(conffile_t * conffile)
{
	char *chksum;
	char *filename = conffile->name;
	char *root_filename;
	int ret = 1;

	if (conffile->value == NULL) {
		opkg_msg(NOTICE, "Conffile %s has no md5sum.\n",
			 conffile->name);
		return 1;
	}

	root_filename = root_filename_alloc(filename);

	if (conffile->value && strlen(conffile->value) > 33) {
		chksum = file_sha256sum_alloc(root_filename);
	} else {
		chksum = file_md5sum_alloc(root_filename);
	}

	if (chksum && (ret = strcmp(chksum, conffile->value))) {
		opkg_msg(INFO, "Conffile %s:\n\told chk=%s\n\tnew chk=%s\n",
			 conffile->name, chksum, conffile->value);
	}

	free(root_filename);
	if (chksum)
		free(chksum);

	return ret;
}