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/* Copyright 2019 Ján Sučan <jan@jansucan.com>
*
* 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 COPYRIGHT HOLDERS AND CONTRIBUTORS
* "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 COPYRIGHT
* HOLDER OR CONTRIBUTORS 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 <endian.h>
#include <errno.h>
#include <inttypes.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "backup.h"
#include "file.h"
#include "options.h"
#include "print.h"
#include "resources.h"
#include "restore.h"
static void
clean_exit(resources_t *const res, int exit_code)
{
resources_free(res);
exit(exit_code);
}
static int
open_files(const options_t *const opts, resources_t *const res,
bool is_action_backup)
{
/* Open the input file */
if ((opts->in_file_path != NULL) &&
((res->in_file = fopen(opts->in_file_path, "r")) == NULL)) {
print_error("cannot open input file: %s", strerror(errno));
return 1;
}
/* Open the reference file */
if ((res->ref_file = fopen(opts->ref_file_path, "r")) == NULL) {
print_error("cannot open reference file: %s", strerror(errno));
return 1;
}
/* Open the output file
*
* When restoring, the file must be opened for writing and not
* truncated
*/
char out_mode[] = "r+";
if (is_action_backup) {
/* When backing up, the output file is truncated to hold the
* new data
*/
out_mode[0] = 'w';
out_mode[1] = '\0';
}
if ((res->out_file = fopen(opts->out_file_path, out_mode)) == NULL) {
print_error("cannot open output file: %s", strerror(errno));
return 1;
}
return 0;
}
int
main(int argc, char **argv)
{
options_t opts;
if (options_parse(argc, argv, &opts)) {
options_usage(1);
} else if (opts.help) {
options_usage(0);
}
const bool is_action_backup = (opts.in_file_path != NULL);
resources_t res;
resources_init(&res);
if (open_files(&opts, &res, is_action_backup) != 0) {
clean_exit(&res, 1);
} else if (is_action_backup) {
clean_exit(&res, backup(&opts, &res));
} else {
clean_exit(&res, restore(&opts, &res));
}
}
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