tfc_signal.c

   1 /*
   2  * tfcrypt -- high security Threefish encryption tool.
   3  *
   4  * tfcrypt is copyrighted:
   5  * Copyright (C) 2012-2019 Andrey Rys. All rights reserved.
   6  *
   7  * tfcrypt is licensed to you under the terms of std. MIT/X11 license:
   8  *
   9  * Permission is hereby granted, free of charge, to any person obtaining
  10  * a copy of this software and associated documentation files (the
  11  * "Software"), to deal in the Software without restriction, including
  12  * without limitation the rights to use, copy, modify, merge, publish,
  13  * distribute, sublicense, and/or sell copies of the Software, and to
  14  * permit persons to whom the Software is furnished to do so, subject to
  15  * the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be
  18  * included in all copies or substantial portions of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
  24  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include "tfcrypt.h"
  30
  31 void exit_sigterm(int signal)
  32 {
  33         xexit(0);
  34 }
  35
  36 void handle_sigtstp(int signal)
  37 {
  38         if (signal == SIGTSTP) {
  39                 tfc_useconds freeze_start, freeze_end;
  40
  41                 tfc_getcurtime(&freeze_start);
  42                 kill(getpid(), SIGSTOP);
  43                 tfc_getcurtime(&freeze_end);
  44                 total_time -= (freeze_end - freeze_start);
  45         }
  46 }
  47
  48 void print_crypt_status(int signal)
  49 {
  50         tfc_fsize wr_speed;
  51         double seconds, human_totalproc_src, human_totalproc_dst, human_totalwrit_dst, human_wr_speed;
  52         int src_scale_idx, dst_scale_idx, wri_scale_idx, wr_speed_scale;
  53         const char *oper_mode, *inplace;
  54         static tfc_yesno last;
  55         tfc_yesno finished = NO;
  56
  57         if (last == YES) return;
  58         if (signal <= 0) {
  59                 finished = YES;
  60                 do_stop = YES; /* error path or sksum finished */
  61                 if (signal == 0) last = YES;
  62         }
  63
  64         switch (do_edcrypt) {
  65                 case TFC_DO_ENCRYPT: oper_mode = "encrypted"; break;
  66                 case TFC_DO_DECRYPT: oper_mode = "decrypted"; break;
  67                 default:
  68                         if (ctr_mode == TFC_MODE_PLAIN) oper_mode = "written";
  69                         else if (ctr_mode == TFC_MODE_SKSUM) oper_mode = "hashed";
  70                         else oper_mode = NULL;
  71                         break;
  72         }
  73
  74         if (signal == SIGINT || signal == SIGTERM) {
  75                 do_stop = YES;
  76         }
  77
  78         tfc_getcurtime(&current_time);
  79         total_time += (current_time - delta_time);
  80         seconds = TFC_UTODSECS(current_time - delta_time);
  81         wr_speed = delta_processed / seconds;
  82         tfc_describescale(total_processed_src, &human_totalproc_src, &src_scale_idx);
  83         tfc_describescale(total_processed_dst, &human_totalproc_dst, &dst_scale_idx);
  84         tfc_describescale(total_written_dst, &human_totalwrit_dst, &wri_scale_idx);
  85         tfc_describescale(wr_speed, &human_wr_speed, &wr_speed_scale);
  86
  87         if (bench_timer) {
  88                 tfc_say("done!");
  89                 tfc_say("%s %s benchmark results:", tfc_format_pid(progname), tfc_modename(ctr_mode));
  90                 tfc_nfsay(stdout, "%s %llu (%.2f%s) bytes, "
  91                         "avg. speed %llu (%.2f%s) B/s, time %.4fs.",
  92                         oper_mode,
  93                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
  94                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale), seconds);
  95                 xexit(0);
  96         }
  97
  98         if (do_statline_dynamic == YES) inplace = "\033[2K\r";
  99         else inplace = "";
 100
 101         if (do_less_stats == YES) {
 102                 tfc_nfsay(stderr, "%s%s%s:"
 103                         " %s %.2f%s,"
 104                         " %.2f%s B/s @%s",
 105                         inplace, (finished && show_when_done) ? "finished: " : "", tfc_format_pid(progname),
 106                         oper_mode,
 107                         human_totalproc_dst, tfc_getscale(dst_scale_idx),
 108                         human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
 109         }
 110         else {
 111                 if (ctr_mode <= TFC_MODE_PLAIN) tfc_nfsay(stderr, "%s%s%s: read: %llu (%.2f%s),"
 112                         " %s %llu (%.2f%s) bytes,"
 113                         " (%llu (%.2f%s) B/s), time %s",
 114                         inplace, (finished && show_when_done) ? "finished: " : "", tfc_format_pid(progname),
 115                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
 116                         oper_mode,
 117                         total_processed_dst, human_totalproc_dst, tfc_getscale(dst_scale_idx),
 118                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
 119                 else tfc_nfsay(stderr, "%s%s%s: read: %llu (%.2f%s),"
 120                         " %s %s %llu (%.2f%s) bytes,"
 121                         " written %llu (%.2f%s) bytes,"
 122                         " (%llu (%.2f%s) B/s), time %s",
 123                         inplace, (finished && show_when_done) ? "finished: " : "", tfc_format_pid(progname),
 124                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
 125                         tfc_modename(ctr_mode), oper_mode,
 126                         total_processed_dst, human_totalproc_dst, tfc_getscale(dst_scale_idx),
 127                         total_written_dst, human_totalwrit_dst, tfc_getscale(wri_scale_idx),
 128                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
 129         }
 130
 131         if (do_stop == NO && do_statline_dynamic == NO) tfc_esay("\n");
 132         statline_was_shown = YES;
 133
 134         if ((signal == SIGINT || signal == SIGTERM) && do_stop == YES) exit_sigterm(signal);
 135
 136         delta_processed = 0;
 137         tfc_getcurtime(&delta_time);
 138
 139         handle_sigtstp(signal);
 140
 141         if (status_timer) setup_next_alarm(status_timer);
 142 }
 143
 144 void change_status_width(int signal)
 145 {
 146         if (do_less_stats == YES) do_less_stats = NO;
 147         else if (do_less_stats == NO) do_less_stats = YES;
 148 }
 149
 150 void change_status_timer(int signal)
 151 {
 152         static tfc_useconds reset_timer;
 153         tfc_useconds t;
 154
 155         tfc_getcurtime(&t);
 156         if (reset_timer && (t - reset_timer) < TFC_DTOUSECS(0.1)) status_timer = 0;
 157         reset_timer = t;
 158
 159         if (status_timer == 0) status_timer = TFC_DTOUSECS(0.25);
 160         else status_timer *= 2;
 161
 162         if (verbose) tfc_esay("%s: status timer was changed to %.2fs",
 163                 tfc_format_pid(progname), TFC_UTODSECS(status_timer));
 164         setup_next_alarm(status_timer);
 165 }
 166
 167 void setup_next_alarm(tfc_useconds useconds)
 168 {
 169         struct itimerval it;
 170
 171         memset(&it, 0, sizeof(struct itimerval));
 172         it.it_value.tv_sec = useconds / 1000000;
 173         it.it_value.tv_usec = useconds % 1000000;
 174         setitimer(ITIMER_REAL, &it, NULL);
 175 }