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) kill(getpid(), SIGSTOP);
  39 }
  40
  41 void print_crypt_status(int signal)
  42 {
  43         tfc_fsize wr_speed;
  44         double seconds, human_totalproc_src, human_totalproc_dst, human_totalwrit_dst, human_wr_speed;
  45         int src_scale_idx, dst_scale_idx, wri_scale_idx, wr_speed_scale;
  46         const char *oper_mode, *inplace;
  47         static tfc_yesno last;
  48
  49         if (last == YES) return;
  50         if (signal == 0 || signal == -1) last = YES;
  51
  52         switch (do_edcrypt) {
  53                 case TFC_DO_ENCRYPT: oper_mode = "encrypted"; break;
  54                 case TFC_DO_DECRYPT: oper_mode = "decrypted"; break;
  55                 default:
  56                         if (ctr_mode == TFC_MODE_PLAIN) oper_mode = "written";
  57                         else if (ctr_mode == TFC_MODE_SKSUM) oper_mode = "hashed";
  58                         else oper_mode = NULL;
  59                         break;
  60         }
  61
  62         if (signal == SIGINT || signal == SIGTERM) {
  63                 do_stop = YES;
  64         }
  65
  66         tfc_getcurtime(&current_time);
  67         total_time += (current_time - delta_time);
  68         seconds = TFC_UTODSECS(current_time - delta_time);
  69         wr_speed = delta_processed / seconds;
  70         tfc_describescale(total_processed_src, &human_totalproc_src, &src_scale_idx);
  71         tfc_describescale(total_processed_dst, &human_totalproc_dst, &dst_scale_idx);
  72         tfc_describescale(total_written_dst, &human_totalwrit_dst, &wri_scale_idx);
  73         tfc_describescale(wr_speed, &human_wr_speed, &wr_speed_scale);
  74
  75         if (bench_timer) {
  76                 tfc_say("done!");
  77                 tfc_say("%s %s benchmark results:", progname, tfc_modename(ctr_mode));
  78                 tfc_nfsay(stdout, "%s %llu (%.2f%s) bytes, "
  79                         "avg. speed %llu (%.2f%s) B/s, time %.4fs.",
  80                         oper_mode,
  81                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
  82                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale),
  83                         TFC_UTODSECS(current_time - delta_time));
  84                 tfc_esay("\n");
  85                 xexit(0);
  86         }
  87
  88         if (do_statline_dynamic == YES) inplace = "\033[2K\r";
  89         else inplace = "";
  90
  91         if (do_less_stats == YES) {
  92                 tfc_nfsay(stderr, "%s%s:"
  93                         " %s %.2f%s,"
  94                         " %.2f%s B/s @%s",
  95                         inplace, progname,
  96                         oper_mode,
  97                         human_totalproc_dst, tfc_getscale(dst_scale_idx),
  98                         human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
  99         }
 100         else {
 101                 if (ctr_mode <= TFC_MODE_PLAIN) tfc_nfsay(stderr, "%s%s: read: %llu (%.2f%s),"
 102                         " %s %llu (%.2f%s) bytes,"
 103                         " (%llu (%.2f%s) B/s), time %s",
 104                         inplace, progname,
 105                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
 106                         oper_mode,
 107                         total_processed_dst, human_totalproc_dst, tfc_getscale(dst_scale_idx),
 108                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
 109                 else tfc_nfsay(stderr, "%s%s: read: %llu (%.2f%s),"
 110                         " %s %s %llu (%.2f%s) bytes,"
 111                         " written %llu (%.2f%s) bytes,"
 112                         " (%llu (%.2f%s) B/s), time %s",
 113                         inplace, progname,
 114                         total_processed_src, human_totalproc_src, tfc_getscale(src_scale_idx),
 115                         tfc_modename(ctr_mode), oper_mode,
 116                         total_processed_dst, human_totalproc_dst, tfc_getscale(dst_scale_idx),
 117                         total_written_dst, human_totalwrit_dst, tfc_getscale(wri_scale_idx),
 118                         wr_speed, human_wr_speed, tfc_getscale(wr_speed_scale), tfc_format_time(total_time));
 119         }
 120
 121         if (do_stop == NO && do_statline_dynamic == NO) tfc_esay("\n");
 122         if (last) tfc_esay("\n");
 123         statline_was_shown = YES;
 124
 125         if ((signal == SIGINT || signal == SIGTERM) && do_stop == YES) {
 126                 tfc_esay("\n");
 127                 exit_sigterm(signal);
 128         }
 129
 130         delta_processed = 0;
 131         tfc_getcurtime(&delta_time);
 132
 133         handle_sigtstp(signal);
 134
 135         if (status_timer) setup_next_alarm(status_timer);
 136 }
 137
 138 void change_status_width(int signal)
 139 {
 140         if (do_less_stats == YES) do_less_stats = NO;
 141         else if (do_less_stats == NO) do_less_stats = YES;
 142 }
 143
 144 void change_status_timer(int signal)
 145 {
 146         static tfc_useconds reset_timer;
 147         tfc_useconds t;
 148
 149         tfc_getcurtime(&t);
 150         if (reset_timer && (t - reset_timer) < TFC_DTOUSECS(0.1)) status_timer = 0;
 151         reset_timer = t;
 152
 153         if (status_timer == 0) status_timer = TFC_DTOUSECS(0.25);
 154         else status_timer *= 2;
 155
 156         if (verbose) tfc_esay("%s: status timer was changed to %.2fs",
 157                 progname, TFC_UTODSECS(status_timer));
 158         setup_next_alarm(status_timer);
 159 }
 160
 161 void setup_next_alarm(tfc_useconds useconds)
 162 {
 163         struct itimerval it;
 164
 165         memset(&it, 0, sizeof(struct itimerval));
 166         it.it_value.tv_sec = useconds / 1000000;
 167         it.it_value.tv_usec = useconds % 1000000;
 168         setitimer(ITIMER_REAL, &it, NULL);
 169 }