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rhash_main.c
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rhash_main.c
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/* rhash_main.c - main() and other top-level functions
*
* rhash is a small utility written in C that computes various message
* digests of files. The message digests include CRC32, MD5, SHA1, TTH,
* ED2K, GOST and many other.
*/
#include "rhash_main.h"
#include "calc_sums.h"
#include "file_mask.h"
#include "find_file.h"
#include "hash_print.h"
#include "hash_update.h"
#include "output.h"
#include "parse_cmdline.h"
#include "win_utils.h"
#include "librhash/rhash.h"
#include <assert.h>
#include <errno.h>
#include <locale.h>
#include <signal.h>
#include <stdlib.h> /* free() */
#include <string.h>
struct rhash_t rhash_data;
/**
* Check if the file must be skipped. Returns 1 if the file path
* is the same as the output or the log file path.
*
* @param file the file to check
* @param mask the mask of accepted files
* @return 1 if the file should be skipped, 0 otherwise
*/
static int must_skip_file(file_t* file)
{
/* check if the file path is the same as the output or the log file path */
return (opt.output && are_paths_equal(file->real_path, &rhash_data.out_file)) ||
(opt.log && are_paths_equal(file->real_path, &rhash_data.log_file)) ||
(opt.update_file && are_paths_equal(file->real_path, &rhash_data.upd_file));
}
/**
* Callback function to process files while recursively traversing a directory.
* It hashes, checks or updates a file according to the current work mode.
*
* @param file the file to process
* @param preprocess non-zero when preprocessing files, zero for actual processing
*/
static int scan_files_callback(file_t* file, int preprocess)
{
int res = 0;
assert(!FILE_ISDIR(file));
assert(opt.search_data);
if (rhash_data.stop_flags) {
opt.search_data->options |= FIND_CANCEL;
return 0;
}
errno = 0; /* start processing each file with clear errno */
if (preprocess) {
if (FILE_ISDATA(file) ||
!file_mask_match(opt.files_accept, file) ||
(opt.files_exclude && file_mask_match(opt.files_exclude, file)) ||
must_skip_file(file))
return 0;
if (rhash_data.is_sfv && print_sfv_header_line(rhash_data.out, rhash_data.out_file.mode, file) < 0) {
log_error_file_t(&rhash_data.out_file);
res = -2;
}
rhash_data.batch_size += file->size;
} else {
int not_root = !(file->mode & FileIsRoot);
if (!FILE_ISSPECIAL(file)) {
if (not_root) {
if (opt.mode == MODE_CHECK || IS_MODE(MODE_MISSING)) {
/* use crc_accept list in the plain recursive check mode, but not in -uc mode */
if (!file_mask_match(opt.crc_accept, file)) {
return 0;
}
} else {
if (!file_mask_match(opt.files_accept, file) ||
(opt.files_exclude && file_mask_match(opt.files_exclude, file))) {
return 0;
}
}
}
if (must_skip_file(file))
return 0;
} else if (FILE_ISDATA(file) && IS_MODE(MODE_CHECK | MODE_CHECK_EMBEDDED |
MODE_UPDATE | MODE_MISSING | MODE_UNVERIFIED | MODE_TORRENT)) {
log_warning(_("skipping: %s\n"), file_get_print_path(file, FPathUtf8 | FPathNotNull));
return 0;
}
if (IS_MODE(MODE_UPDATE | MODE_UNVERIFIED)) {
res = update_ctx_update(rhash_data.update_context, file);
} else if (IS_MODE(MODE_CHECK | MODE_MISSING)) {
res = check_hash_file(file, not_root);
} else if (IS_MODE(MODE_CHECK_EMBEDDED)) {
res = check_embedded_crc32(file);
} else {
/* default mode: calculate hash */
res = calculate_and_print_sums(rhash_data.out, &rhash_data.out_file, file);
if (rhash_data.stop_flags) {
opt.search_data->options |= FIND_CANCEL;
return 0;
}
rhash_data.processed++;
}
}
if (res < -1) {
rhash_data.stop_flags |= FatalErrorFlag;
opt.search_data->options |= FIND_CANCEL;
return 0;
} else if (res < 0)
rhash_data.non_fatal_error = 1;
return 1;
}
/* previous SIGINT handler */
void (*prev_sigint_handler)(int) = NULL;
/**
* Handler for the SIGINT signal, sent when user press Ctrl+C.
* The handler prints message and exits the program.
*
* @param signum the processed signal identifier SIGINT
*/
static void ctrl_c_handler(int signum)
{
(void)signum;
rhash_data.stop_flags |= InterruptedFlag;
if (rhash_data.rctx) {
rhash_cancel(rhash_data.rctx);
}
}
#define MAX_TEMPLATE_SIZE 65536
/**
* Load printf-template from file, specified by options or config.
*/
static int load_printf_template(void)
{
FILE* fd;
file_t file;
char buffer[8192];
size_t len;
int error = 0;
file_init(&file, opt.template_file, FileInitReusePath);
fd = file_fopen(&file, FOpenRead | FOpenBin);
if (!fd)
{
log_error_file_t(&file);
file_cleanup(&file);
return 0;
}
rhash_data.template_text = rsh_str_new();
while (!feof(fd)) {
len = fread(buffer, 1, 8192, fd);
if (ferror(fd)) break;
rsh_str_append_n(rhash_data.template_text, buffer, len);
if (rhash_data.template_text->len >= MAX_TEMPLATE_SIZE) {
log_msg_file_t(_("%s: template file is too big\n"), &file);
error = 1;
}
}
if (ferror(fd)) {
log_error_file_t(&file);
error = 1;
}
fclose(fd);
file_cleanup(&file);
rhash_data.printf_str = rhash_data.template_text->str;
return !error;
}
/**
* Free data allocated by an rhash_t object
*
* @param ptr pointer to rhash_t object
*/
void rhash_destroy(struct rhash_t* ptr)
{
free_print_list(ptr->print_list);
rsh_str_free(ptr->template_text);
if (ptr->update_context)
update_ctx_free(ptr->update_context);
if (ptr->rctx)
rhash_free(ptr->rctx);
if (ptr->out && !FILE_ISSTDSTREAM(&ptr->out_file))
fclose(ptr->out);
if (ptr->log && !FILE_ISSTDSTREAM(&ptr->log_file))
fclose(ptr->log);
file_cleanup(&ptr->out_file);
file_cleanup(&ptr->log_file);
file_cleanup(&ptr->upd_file);
file_cleanup(&ptr->config_file);
}
static void free_allocated_data(void)
{
options_destroy(&opt);
rhash_destroy(&rhash_data);
}
static void i18n_initialize(void)
{
setlocale(LC_ALL, ""); /* set locale according to the environment */
#ifdef USE_GETTEXT
bindtextdomain(TEXT_DOMAIN, LOCALEDIR); /* set the text message domain */
IF_WINDOWS(setup_locale_dir());
textdomain(TEXT_DOMAIN);
#endif /* USE_GETTEXT */
}
/**
* RHash program entry point.
*
* @param argc number of program arguments including the program path
* @param argv program arguments
* @return the program exit code, zero on success and 1 on error
*/
int main(int argc, char* argv[])
{
timedelta_t timer;
int exit_code;
int need_sfv_banner;
memset(&rhash_data, 0, sizeof(rhash_data));
memset(&opt, 0, sizeof(opt));
rhash_data.out = stdout; /* set initial output streams */
rhash_data.log = stderr; /* can be altered by options later */
rsh_install_exit_handler(free_allocated_data);
IF_WINDOWS(init_program_dir());
init_hash_info_table();
i18n_initialize(); /* initialize locale and translation */
read_options(argc, argv); /* load config and parse command line options */
prev_sigint_handler = signal(SIGINT, ctrl_c_handler); /* install SIGINT handler */
if (opt.openssl_mask)
set_openssl_enabled_hash_mask(opt.openssl_mask);
rhash_library_init();
setup_percents();
/* in benchmark mode just run benchmark and exit */
if (IS_MODE(MODE_BENCHMARK)) {
unsigned flags = (HAS_OPTION(OPT_BENCH_RAW) ? BENCHMARK_CPB | BENCHMARK_RAW : BENCHMARK_CPB);
if (!HAS_OPTION(OPT_BENCH_RAW)) {
rsh_fprintf(rhash_data.out, _("%s v%s benchmarking...\n"), PROGRAM_NAME, get_version_string());
}
run_benchmark(opt.hash_mask, flags);
exit_code = (rhash_data.stop_flags ? 3 : 0);
rsh_exit(exit_code);
}
if (!IS_MODE(MODE_MISSING) && !opt.has_files) {
if (argc > 1) {
log_warning(_("no files/directories were specified at command line\n"));
}
/* print short usage help */
log_msg(_("Usage: %s [OPTION...] <FILE>...\n\n"
"Run `%s --help' for more help.\n"), CMD_FILENAME, CMD_FILENAME);
rsh_exit(0);
}
assert(opt.search_data != 0);
/* setup printf formatting string */
rhash_data.printf_str = opt.printf_str;
/* print SFV header if CRC32 or no hash function has been selected */
rhash_data.is_sfv = (opt.fmt == FMT_SFV || (!opt.fmt &&
(!opt.hash_mask || opt.hash_mask == hash_id_to_bit64(RHASH_CRC32))));
if (!opt.hash_mask && opt.mode != MODE_CHECK && opt.mode != MODE_MISSING)
opt.hash_mask = hash_id_to_bit64(RHASH_CRC32);
if (opt.template_file) {
if (!load_printf_template()) rsh_exit(2);
} else if (!rhash_data.printf_str && IS_MODE(MODE_DEFAULT | MODE_UPDATE | MODE_TORRENT)) {
/* initialize printf output format according to '--<hashname>' options */
rhash_data.template_text = init_printf_format();
rhash_data.printf_str = rhash_data.template_text->str;
if (opt.verbose) {
char* str = rsh_strdup(rhash_data.printf_str);
log_msg(_("Format string is: %s\n"), str_trim(str));
free(str);
}
}
if (rhash_data.printf_str) {
rhash_data.print_list = parse_print_string(rhash_data.printf_str, &opt.hash_mask);
}
opt.search_data->options = FIND_SKIP_DIRS;
opt.search_data->options |= (HAS_OPTION(OPT_FOLLOW) ? FIND_FOLLOW_SYMLINKS : 0);
opt.search_data->callback = scan_files_callback;
need_sfv_banner = (rhash_data.is_sfv && IS_MODE(MODE_DEFAULT));
if (need_sfv_banner && print_sfv_banner(rhash_data.out) < 0) {
log_error_file_t(&rhash_data.out_file);
rhash_data.stop_flags |= FatalErrorFlag;
}
/* preprocess files */
if (need_sfv_banner || opt.bt_batch_file) {
/* note: errors are not reported on preprocessing */
opt.search_data->callback_data = 1;
scan_files(opt.search_data);
if (fflush(rhash_data.out) < 0) {
log_error_file_t(&rhash_data.out_file);
rhash_data.stop_flags |= FatalErrorFlag;
}
}
if ((rhash_data.stop_flags & FatalErrorFlag) != 0)
rsh_exit(2);
/* measure total processing time */
rsh_timer_start(&timer);
rhash_data.processed = 0;
if (opt.update_file)
{
file_init(&rhash_data.upd_file, opt.update_file, FileInitReusePath);
rhash_data.update_context = update_ctx_new(&rhash_data.upd_file);
if (!rhash_data.update_context)
rsh_exit(0);
}
/* process files */
opt.search_data->options |= FIND_LOG_ERRORS;
opt.search_data->callback_data = 0;
scan_files(opt.search_data);
if (IS_MODE(MODE_CHECK_EMBEDDED) && rhash_data.processed > 1) {
if (print_check_stats() < 0) {
log_error_file_t(&rhash_data.out_file);
rhash_data.stop_flags |= FatalErrorFlag;
}
}
if (rhash_data.update_context) {
/* finalize the updated hash file and check for errors */
if (update_ctx_free(rhash_data.update_context) < 0)
rhash_data.stop_flags |= FatalErrorFlag;
rhash_data.update_context = 0;
}
if (!rhash_data.stop_flags) {
if (opt.bt_batch_file && rhash_data.rctx) {
file_t batch_torrent_file;
file_init(&batch_torrent_file, opt.bt_batch_file, FileInitReusePath);
rhash_final(rhash_data.rctx, 0);
if (save_torrent_to(&batch_torrent_file, rhash_data.rctx) < 0)
rhash_data.stop_flags |= FatalErrorFlag;
file_cleanup(&batch_torrent_file);
}
if (HAS_OPTION(OPT_SPEED) && opt.mode != MODE_CHECK && rhash_data.total_size != 0) {
uint64_t time = rsh_timer_stop(&timer);
print_time_stats(time, rhash_data.total_size, 1);
}
} else
report_interrupted();
exit_code = ((rhash_data.stop_flags & FatalErrorFlag) ? 2 :
(rhash_data.non_fatal_error || opt.search_data->errors_count) ? 1 :
(rhash_data.stop_flags & InterruptedFlag) ? 3 : 0);
rsh_call_exit_handlers();
return exit_code;
}