1 /* $NetBSD: progressmeter.c,v 1.8 2016/08/02 13:45:12 christos Exp $ */ 2 /* $OpenBSD: progressmeter.c,v 1.45 2016/06/30 05:17:05 dtucker Exp $ */ 3 /* 4 * Copyright (c) 2003 Nils Nordman. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 */ 26 27 #include "includes.h" 28 __RCSID("$NetBSD: progressmeter.c,v 1.8 2016/08/02 13:45:12 christos Exp $"); 29 #include <sys/types.h> 30 #include <sys/ioctl.h> 31 #include <sys/uio.h> 32 33 #include <errno.h> 34 #include <signal.h> 35 #include <stdio.h> 36 #include <string.h> 37 #include <time.h> 38 #include <unistd.h> 39 40 #include "progressmeter.h" 41 #include "atomicio.h" 42 #include "misc.h" 43 44 #define DEFAULT_WINSIZE 80 45 #define MAX_WINSIZE 512 46 #define PADDING 1 /* padding between the progress indicators */ 47 #define UPDATE_INTERVAL 1 /* update the progress meter every second */ 48 #define STALL_TIME 5 /* we're stalled after this many seconds */ 49 50 /* determines whether we can output to the terminal */ 51 static int can_output(void); 52 53 /* formats and inserts the specified size into the given buffer */ 54 static void format_size(char *, int, off_t); 55 static void format_rate(char *, int, off_t); 56 57 /* window resizing */ 58 static void sig_winch(int); 59 static void setscreensize(void); 60 61 /* updates the progressmeter to reflect the current state of the transfer */ 62 void refresh_progress_meter(void); 63 64 /* signal handler for updating the progress meter */ 65 static void update_progress_meter(int); 66 67 static double start; /* start progress */ 68 static double last_update; /* last progress update */ 69 static const char *file; /* name of the file being transferred */ 70 static off_t start_pos; /* initial position of transfer */ 71 static off_t end_pos; /* ending position of transfer */ 72 static off_t cur_pos; /* transfer position as of last refresh */ 73 static off_t last_pos; 74 static off_t max_delta_pos = 0; 75 static volatile off_t *counter; /* progress counter */ 76 static long stalled; /* how long we have been stalled */ 77 static int bytes_per_second; /* current speed in bytes per second */ 78 static int win_size; /* terminal window size */ 79 static volatile sig_atomic_t win_resized; /* for window resizing */ 80 81 /* units for format_size */ 82 static const char unit[] = " KMGT"; 83 84 static int 85 can_output(void) 86 { 87 return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); 88 } 89 90 static void 91 format_rate(char *buf, int size, off_t bytes) 92 { 93 int i; 94 95 bytes *= 100; 96 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) 97 bytes = (bytes + 512) / 1024; 98 if (i == 0) { 99 i++; 100 bytes = (bytes + 512) / 1024; 101 } 102 snprintf(buf, size, "%3lld.%1lld%c%s", 103 (long long) (bytes + 5) / 100, 104 (long long) (bytes + 5) / 10 % 10, 105 unit[i], 106 i ? "B" : " "); 107 } 108 109 static void 110 format_size(char *buf, int size, off_t bytes) 111 { 112 int i; 113 114 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) 115 bytes = (bytes + 512) / 1024; 116 snprintf(buf, size, "%4lld%c%s", 117 (long long) bytes, 118 unit[i], 119 i ? "B" : " "); 120 } 121 122 void 123 refresh_progress_meter(void) 124 { 125 char buf[MAX_WINSIZE + 1]; 126 off_t transferred; 127 double elapsed, now; 128 int percent; 129 off_t bytes_left; 130 int cur_speed; 131 int hours, minutes, seconds; 132 int i, len; 133 int file_len; 134 off_t delta_pos; 135 136 transferred = *counter - (cur_pos ? cur_pos : start_pos); 137 cur_pos = *counter; 138 now = monotime_double(); 139 bytes_left = end_pos - cur_pos; 140 141 delta_pos = cur_pos - last_pos; 142 if (delta_pos > max_delta_pos) 143 max_delta_pos = delta_pos; 144 145 if (bytes_left > 0) 146 elapsed = now - last_update; 147 else { 148 elapsed = now - start; 149 /* Calculate true total speed when done */ 150 transferred = end_pos - start_pos; 151 bytes_per_second = 0; 152 } 153 154 /* calculate speed */ 155 if (elapsed != 0) 156 cur_speed = (transferred / elapsed); 157 else 158 cur_speed = transferred; 159 160 #define AGE_FACTOR 0.9 161 if (bytes_per_second != 0) { 162 bytes_per_second = (bytes_per_second * AGE_FACTOR) + 163 (cur_speed * (1.0 - AGE_FACTOR)); 164 } else 165 bytes_per_second = cur_speed; 166 167 /* filename */ 168 buf[0] = '\0'; 169 file_len = win_size - 45; 170 if (file_len > 0) { 171 len = snprintf(buf, file_len + 1, "\r%s", file); 172 if (len < 0) 173 len = 0; 174 if (len >= file_len + 1) 175 len = file_len; 176 for (i = len; i < file_len; i++) 177 buf[i] = ' '; 178 buf[file_len] = '\0'; 179 } 180 181 /* percent of transfer done */ 182 if (end_pos == 0 || cur_pos == end_pos) 183 percent = 100; 184 else 185 percent = ((float)cur_pos / end_pos) * 100; 186 snprintf(buf + strlen(buf), win_size - strlen(buf), 187 " %3d%% ", percent); 188 189 /* amount transferred */ 190 format_size(buf + strlen(buf), win_size - strlen(buf), 191 cur_pos); 192 strlcat(buf, " ", win_size); 193 194 /* bandwidth usage */ 195 format_rate(buf + strlen(buf), win_size - strlen(buf), 196 (off_t)bytes_per_second); 197 strlcat(buf, "/s ", win_size); 198 199 /* instantaneous rate */ 200 if (bytes_left > 0) 201 format_rate(buf + strlen(buf), win_size - strlen(buf), 202 delta_pos); 203 else 204 format_rate(buf + strlen(buf), win_size - strlen(buf), 205 max_delta_pos); 206 strlcat(buf, "/s ", win_size); 207 208 /* ETA */ 209 if (!transferred) 210 stalled += elapsed; 211 else 212 stalled = 0; 213 214 if (stalled >= STALL_TIME) 215 strlcat(buf, "- stalled -", win_size); 216 else if (bytes_per_second == 0 && bytes_left) 217 strlcat(buf, " --:-- ETA", win_size); 218 else { 219 if (bytes_left > 0) 220 seconds = bytes_left / bytes_per_second; 221 else 222 seconds = elapsed; 223 224 hours = seconds / 3600; 225 seconds -= hours * 3600; 226 minutes = seconds / 60; 227 seconds -= minutes * 60; 228 229 if (hours != 0) 230 snprintf(buf + strlen(buf), win_size - strlen(buf), 231 "%d:%02d:%02d", hours, minutes, seconds); 232 else 233 snprintf(buf + strlen(buf), win_size - strlen(buf), 234 " %02d:%02d", minutes, seconds); 235 236 if (bytes_left > 0) 237 strlcat(buf, " ETA", win_size); 238 else 239 strlcat(buf, " ", win_size); 240 } 241 242 atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); 243 last_update = now; 244 last_pos = cur_pos; 245 } 246 247 /*ARGSUSED*/ 248 static void 249 update_progress_meter(int ignore) 250 { 251 int save_errno; 252 253 save_errno = errno; 254 255 if (win_resized) { 256 setscreensize(); 257 win_resized = 0; 258 } 259 if (can_output()) 260 refresh_progress_meter(); 261 262 signal(SIGALRM, update_progress_meter); 263 alarm(UPDATE_INTERVAL); 264 errno = save_errno; 265 } 266 267 void 268 start_progress_meter(const char *f, off_t filesize, off_t *ctr) 269 { 270 start = last_update = monotime_double(); 271 file = f; 272 start_pos = *ctr; 273 end_pos = filesize; 274 cur_pos = 0; 275 counter = ctr; 276 stalled = 0; 277 bytes_per_second = 0; 278 279 setscreensize(); 280 if (can_output()) 281 refresh_progress_meter(); 282 283 signal(SIGALRM, update_progress_meter); 284 signal(SIGWINCH, sig_winch); 285 alarm(UPDATE_INTERVAL); 286 } 287 288 void 289 stop_progress_meter(void) 290 { 291 alarm(0); 292 293 if (!can_output()) 294 return; 295 296 /* Ensure we complete the progress */ 297 if (cur_pos != end_pos) 298 refresh_progress_meter(); 299 300 atomicio(vwrite, STDOUT_FILENO, __UNCONST("\n"), 1); 301 } 302 303 /*ARGSUSED*/ 304 static void 305 sig_winch(int sig) 306 { 307 win_resized = 1; 308 } 309 310 static void 311 setscreensize(void) 312 { 313 struct winsize winsize; 314 315 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && 316 winsize.ws_col != 0) { 317 if (winsize.ws_col > MAX_WINSIZE) 318 win_size = MAX_WINSIZE; 319 else 320 win_size = winsize.ws_col; 321 } else 322 win_size = DEFAULT_WINSIZE; 323 win_size += 1; /* trailing \0 */ 324 } 325