1/* $NetBSD: progressmeter.c,v 1.4 2011/07/25 03:03:10 christos Exp $ */ 2/* $OpenBSD: progressmeter.c,v 1.37 2006/08/03 03:34:42 deraadt 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 1.4 2011/07/25 03:03:10 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 43#define DEFAULT_WINSIZE 80 44#define MAX_WINSIZE 512 45#define PADDING 1 /* padding between the progress indicators */ 46#define UPDATE_INTERVAL 1 /* update the progress meter every second */ 47#define STALL_TIME 5 /* we're stalled after this many seconds */ 48 49/* determines whether we can output to the terminal */ 50static int can_output(void); 51 52/* formats and inserts the specified size into the given buffer */ 53static void format_size(char *, int, off_t); 54static void format_rate(char *, int, off_t); 55 56/* window resizing */ 57static void sig_winch(int); 58static void setscreensize(void); 59 60/* updates the progressmeter to reflect the current state of the transfer */ 61void refresh_progress_meter(void); 62 63/* signal handler for updating the progress meter */ 64static void update_progress_meter(int); 65 66static time_t start; /* start progress */ 67static time_t last_update; /* last progress update */ 68static char *file; /* name of the file being transferred */ 69static off_t end_pos; /* ending position of transfer */ 70static off_t cur_pos; /* transfer position as of last refresh */ 71static off_t last_pos; 72static off_t max_delta_pos = 0; 73static volatile off_t *counter; /* progress counter */ 74static long stalled; /* how long we have been stalled */ 75static int bytes_per_second; /* current speed in bytes per second */ 76static int win_size; /* terminal window size */ 77static volatile sig_atomic_t win_resized; /* for window resizing */ 78 79/* units for format_size */ 80static const char unit[] = " KMGT"; 81 82static int 83can_output(void) 84{ 85 return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); 86} 87 88static void 89format_rate(char *buf, int size, off_t bytes) 90{ 91 int i; 92 93 bytes *= 100; 94 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) 95 bytes = (bytes + 512) / 1024; 96 if (i == 0) { 97 i++; 98 bytes = (bytes + 512) / 1024; 99 } 100 snprintf(buf, size, "%3lld.%1lld%c%s", 101 (long long) (bytes + 5) / 100, 102 (long long) (bytes + 5) / 10 % 10, 103 unit[i], 104 i ? "B" : " "); 105} 106 107static void 108format_size(char *buf, int size, off_t bytes) 109{ 110 int i; 111 112 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) 113 bytes = (bytes + 512) / 1024; 114 snprintf(buf, size, "%4lld%c%s", 115 (long long) bytes, 116 unit[i], 117 i ? "B" : " "); 118} 119 120void 121refresh_progress_meter(void) 122{ 123 char buf[MAX_WINSIZE + 1]; 124 time_t now; 125 off_t transferred; 126 double elapsed; 127 int percent; 128 off_t bytes_left; 129 int cur_speed; 130 int hours, minutes, seconds; 131 int i, len; 132 int file_len; 133 off_t delta_pos; 134 135 transferred = *counter - cur_pos; 136 cur_pos = *counter; 137 now = time(NULL); 138 bytes_left = end_pos - cur_pos; 139 140 delta_pos = cur_pos - last_pos; 141 if (delta_pos > max_delta_pos) 142 max_delta_pos = delta_pos; 143 144 if (bytes_left > 0) 145 elapsed = now - last_update; 146 else { 147 elapsed = now - start; 148 /* Calculate true total speed when done */ 149 transferred = end_pos; 150 bytes_per_second = 0; 151 } 152 153 /* calculate speed */ 154 if (elapsed != 0) 155 cur_speed = (transferred / elapsed); 156 else 157 cur_speed = transferred; 158 159#define AGE_FACTOR 0.9 160 if (bytes_per_second != 0) { 161 bytes_per_second = (bytes_per_second * AGE_FACTOR) + 162 (cur_speed * (1.0 - AGE_FACTOR)); 163 } else 164 bytes_per_second = cur_speed; 165 166 /* filename */ 167 buf[0] = '\0'; 168 file_len = win_size - 45; 169 if (file_len > 0) { 170 len = snprintf(buf, file_len + 1, "\r%s", file); 171 if (len < 0) 172 len = 0; 173 if (len >= file_len + 1) 174 len = file_len; 175 for (i = len; i < file_len; i++) 176 buf[i] = ' '; 177 buf[file_len] = '\0'; 178 } 179 180 /* percent of transfer done */ 181 if (end_pos != 0) 182 percent = ((float)cur_pos / end_pos) * 100; 183 else 184 percent = 100; 185 snprintf(buf + strlen(buf), win_size - strlen(buf) - 8, 186 " %3d%% ", percent); 187 188 /* amount transferred */ 189 format_size(buf + strlen(buf), win_size - strlen(buf), 190 cur_pos); 191 strlcat(buf, " ", win_size); 192 193 /* bandwidth usage */ 194 format_rate(buf + strlen(buf), win_size - strlen(buf), 195 (off_t)bytes_per_second); 196 strlcat(buf, "/s ", win_size); 197 198 /* instantaneous rate */ 199 if (bytes_left > 0) 200 format_rate(buf + strlen(buf), win_size - strlen(buf), 201 delta_pos); 202 else 203 format_rate(buf + strlen(buf), win_size - strlen(buf), 204 max_delta_pos); 205 strlcat(buf, "/s ", win_size); 206 207 /* ETA */ 208 if (!transferred) 209 stalled += elapsed; 210 else 211 stalled = 0; 212 213 if (stalled >= STALL_TIME) 214 strlcat(buf, "- stalled -", win_size); 215 else if (bytes_per_second == 0 && bytes_left) 216 strlcat(buf, " --:-- ETA", win_size); 217 else { 218 if (bytes_left > 0) 219 seconds = bytes_left / bytes_per_second; 220 else 221 seconds = elapsed; 222 223 hours = seconds / 3600; 224 seconds -= hours * 3600; 225 minutes = seconds / 60; 226 seconds -= minutes * 60; 227 228 if (hours != 0) 229 snprintf(buf + strlen(buf), win_size - strlen(buf), 230 "%d:%02d:%02d", hours, minutes, seconds); 231 else 232 snprintf(buf + strlen(buf), win_size - strlen(buf), 233 " %02d:%02d", minutes, seconds); 234 235 if (bytes_left > 0) 236 strlcat(buf, " ETA", win_size); 237 else 238 strlcat(buf, " ", win_size); 239 } 240 241 atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); 242 last_update = now; 243 last_pos = cur_pos; 244} 245 246/*ARGSUSED*/ 247static void 248update_progress_meter(int ignore) 249{ 250 int save_errno; 251 252 save_errno = errno; 253 254 if (win_resized) { 255 setscreensize(); 256 win_resized = 0; 257 } 258 if (can_output()) 259 refresh_progress_meter(); 260 261 signal(SIGALRM, update_progress_meter); 262 alarm(UPDATE_INTERVAL); 263 errno = save_errno; 264} 265 266void 267start_progress_meter(char *f, off_t filesize, off_t *ctr) 268{ 269 start = last_update = time(NULL); 270 file = f; 271 end_pos = filesize; 272 cur_pos = 0; 273 counter = ctr; 274 stalled = 0; 275 bytes_per_second = 0; 276 277 setscreensize(); 278 if (can_output()) 279 refresh_progress_meter(); 280 281 signal(SIGALRM, update_progress_meter); 282 signal(SIGWINCH, sig_winch); 283 alarm(UPDATE_INTERVAL); 284} 285 286void 287stop_progress_meter(void) 288{ 289 alarm(0); 290 291 if (!can_output()) 292 return; 293 294 /* Ensure we complete the progress */ 295 if (cur_pos != end_pos) 296 refresh_progress_meter(); 297 298 atomicio(vwrite, STDOUT_FILENO, __UNCONST("\n"), 1); 299} 300 301/*ARGSUSED*/ 302static void 303sig_winch(int sig) 304{ 305 win_resized = 1; 306} 307 308static void 309setscreensize(void) 310{ 311 struct winsize winsize; 312 313 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && 314 winsize.ws_col != 0) { 315 if (winsize.ws_col > MAX_WINSIZE) 316 win_size = MAX_WINSIZE; 317 else 318 win_size = winsize.ws_col; 319 } else 320 win_size = DEFAULT_WINSIZE; 321 win_size += 1; /* trailing \0 */ 322} 323