Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 1 | /* $OpenBSD: progressmeter.c,v 1.41 2015/01/14 13:54:13 djm Exp $ */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (c) 2003 Nils Nordman. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * |
| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
| 15 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| 16 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
| 17 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 18 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| 19 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 20 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 21 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 22 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
| 23 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 24 | */ |
| 25 | |
| 26 | #include "includes.h" |
| 27 | |
| 28 | #include <sys/types.h> |
| 29 | #include <sys/ioctl.h> |
| 30 | #include <sys/uio.h> |
| 31 | |
| 32 | #include <errno.h> |
| 33 | #include <signal.h> |
| 34 | #include <stdio.h> |
| 35 | #include <string.h> |
| 36 | #include <time.h> |
| 37 | #include <unistd.h> |
| 38 | |
| 39 | #include "progressmeter.h" |
| 40 | #include "atomicio.h" |
| 41 | #include "misc.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 */ |
| 50 | static int can_output(void); |
| 51 | |
| 52 | /* formats and inserts the specified size into the given buffer */ |
| 53 | static void format_size(char *, int, off_t); |
| 54 | static void format_rate(char *, int, off_t); |
| 55 | |
| 56 | /* window resizing */ |
| 57 | static void sig_winch(int); |
| 58 | static void setscreensize(void); |
| 59 | |
| 60 | /* updates the progressmeter to reflect the current state of the transfer */ |
| 61 | void refresh_progress_meter(void); |
| 62 | |
| 63 | /* signal handler for updating the progress meter */ |
| 64 | static void update_progress_meter(int); |
| 65 | |
| 66 | static time_t start; /* start progress */ |
| 67 | static time_t last_update; /* last progress update */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 68 | static const char *file; /* name of the file being transferred */ |
| 69 | static off_t start_pos; /* initial position of transfer */ |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 70 | static off_t end_pos; /* ending position of transfer */ |
| 71 | static off_t cur_pos; /* transfer position as of last refresh */ |
| 72 | static volatile off_t *counter; /* progress counter */ |
| 73 | static long stalled; /* how long we have been stalled */ |
| 74 | static int bytes_per_second; /* current speed in bytes per second */ |
| 75 | static int win_size; /* terminal window size */ |
| 76 | static volatile sig_atomic_t win_resized; /* for window resizing */ |
| 77 | |
| 78 | /* units for format_size */ |
| 79 | static const char unit[] = " KMGT"; |
| 80 | |
| 81 | static int |
| 82 | can_output(void) |
| 83 | { |
| 84 | return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | format_rate(char *buf, int size, off_t bytes) |
| 89 | { |
| 90 | int i; |
| 91 | |
| 92 | bytes *= 100; |
| 93 | for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) |
| 94 | bytes = (bytes + 512) / 1024; |
| 95 | if (i == 0) { |
| 96 | i++; |
| 97 | bytes = (bytes + 512) / 1024; |
| 98 | } |
| 99 | snprintf(buf, size, "%3lld.%1lld%c%s", |
| 100 | (long long) (bytes + 5) / 100, |
| 101 | (long long) (bytes + 5) / 10 % 10, |
| 102 | unit[i], |
| 103 | i ? "B" : " "); |
| 104 | } |
| 105 | |
| 106 | static void |
| 107 | format_size(char *buf, int size, off_t bytes) |
| 108 | { |
| 109 | int i; |
| 110 | |
| 111 | for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) |
| 112 | bytes = (bytes + 512) / 1024; |
| 113 | snprintf(buf, size, "%4lld%c%s", |
| 114 | (long long) bytes, |
| 115 | unit[i], |
| 116 | i ? "B" : " "); |
| 117 | } |
| 118 | |
| 119 | void |
| 120 | refresh_progress_meter(void) |
| 121 | { |
| 122 | char buf[MAX_WINSIZE + 1]; |
| 123 | time_t now; |
| 124 | off_t transferred; |
| 125 | double elapsed; |
| 126 | int percent; |
| 127 | off_t bytes_left; |
| 128 | int cur_speed; |
| 129 | int hours, minutes, seconds; |
| 130 | int i, len; |
| 131 | int file_len; |
| 132 | |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 133 | transferred = *counter - (cur_pos ? cur_pos : start_pos); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 134 | cur_pos = *counter; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 135 | now = monotime(); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 136 | bytes_left = end_pos - cur_pos; |
| 137 | |
| 138 | if (bytes_left > 0) |
| 139 | elapsed = now - last_update; |
| 140 | else { |
| 141 | elapsed = now - start; |
| 142 | /* Calculate true total speed when done */ |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 143 | transferred = end_pos - start_pos; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 144 | bytes_per_second = 0; |
| 145 | } |
| 146 | |
| 147 | /* calculate speed */ |
| 148 | if (elapsed != 0) |
| 149 | cur_speed = (transferred / elapsed); |
| 150 | else |
| 151 | cur_speed = transferred; |
| 152 | |
| 153 | #define AGE_FACTOR 0.9 |
| 154 | if (bytes_per_second != 0) { |
| 155 | bytes_per_second = (bytes_per_second * AGE_FACTOR) + |
| 156 | (cur_speed * (1.0 - AGE_FACTOR)); |
| 157 | } else |
| 158 | bytes_per_second = cur_speed; |
| 159 | |
| 160 | /* filename */ |
| 161 | buf[0] = '\0'; |
| 162 | file_len = win_size - 35; |
| 163 | if (file_len > 0) { |
| 164 | len = snprintf(buf, file_len + 1, "\r%s", file); |
| 165 | if (len < 0) |
| 166 | len = 0; |
| 167 | if (len >= file_len + 1) |
| 168 | len = file_len; |
| 169 | for (i = len; i < file_len; i++) |
| 170 | buf[i] = ' '; |
| 171 | buf[file_len] = '\0'; |
| 172 | } |
| 173 | |
| 174 | /* percent of transfer done */ |
| 175 | if (end_pos != 0) |
| 176 | percent = ((float)cur_pos / end_pos) * 100; |
| 177 | else |
| 178 | percent = 100; |
| 179 | snprintf(buf + strlen(buf), win_size - strlen(buf), |
| 180 | " %3d%% ", percent); |
| 181 | |
| 182 | /* amount transferred */ |
| 183 | format_size(buf + strlen(buf), win_size - strlen(buf), |
| 184 | cur_pos); |
| 185 | strlcat(buf, " ", win_size); |
| 186 | |
| 187 | /* bandwidth usage */ |
| 188 | format_rate(buf + strlen(buf), win_size - strlen(buf), |
| 189 | (off_t)bytes_per_second); |
| 190 | strlcat(buf, "/s ", win_size); |
| 191 | |
| 192 | /* ETA */ |
| 193 | if (!transferred) |
| 194 | stalled += elapsed; |
| 195 | else |
| 196 | stalled = 0; |
| 197 | |
| 198 | if (stalled >= STALL_TIME) |
| 199 | strlcat(buf, "- stalled -", win_size); |
| 200 | else if (bytes_per_second == 0 && bytes_left) |
| 201 | strlcat(buf, " --:-- ETA", win_size); |
| 202 | else { |
| 203 | if (bytes_left > 0) |
| 204 | seconds = bytes_left / bytes_per_second; |
| 205 | else |
| 206 | seconds = elapsed; |
| 207 | |
| 208 | hours = seconds / 3600; |
| 209 | seconds -= hours * 3600; |
| 210 | minutes = seconds / 60; |
| 211 | seconds -= minutes * 60; |
| 212 | |
| 213 | if (hours != 0) |
| 214 | snprintf(buf + strlen(buf), win_size - strlen(buf), |
| 215 | "%d:%02d:%02d", hours, minutes, seconds); |
| 216 | else |
| 217 | snprintf(buf + strlen(buf), win_size - strlen(buf), |
| 218 | " %02d:%02d", minutes, seconds); |
| 219 | |
| 220 | if (bytes_left > 0) |
| 221 | strlcat(buf, " ETA", win_size); |
| 222 | else |
| 223 | strlcat(buf, " ", win_size); |
| 224 | } |
| 225 | |
| 226 | atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); |
| 227 | last_update = now; |
| 228 | } |
| 229 | |
| 230 | /*ARGSUSED*/ |
| 231 | static void |
| 232 | update_progress_meter(int ignore) |
| 233 | { |
| 234 | int save_errno; |
| 235 | |
| 236 | save_errno = errno; |
| 237 | |
| 238 | if (win_resized) { |
| 239 | setscreensize(); |
| 240 | win_resized = 0; |
| 241 | } |
| 242 | if (can_output()) |
| 243 | refresh_progress_meter(); |
| 244 | |
| 245 | signal(SIGALRM, update_progress_meter); |
| 246 | alarm(UPDATE_INTERVAL); |
| 247 | errno = save_errno; |
| 248 | } |
| 249 | |
| 250 | void |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 251 | start_progress_meter(const char *f, off_t filesize, off_t *ctr) |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 252 | { |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 253 | start = last_update = monotime(); |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 254 | file = f; |
Adam Langley | d059297 | 2015-03-30 14:49:51 -0700 | [diff] [blame^] | 255 | start_pos = *ctr; |
Greg Hartman | bd77cf7 | 2015-02-25 13:21:06 -0800 | [diff] [blame] | 256 | end_pos = filesize; |
| 257 | cur_pos = 0; |
| 258 | counter = ctr; |
| 259 | stalled = 0; |
| 260 | bytes_per_second = 0; |
| 261 | |
| 262 | setscreensize(); |
| 263 | if (can_output()) |
| 264 | refresh_progress_meter(); |
| 265 | |
| 266 | signal(SIGALRM, update_progress_meter); |
| 267 | signal(SIGWINCH, sig_winch); |
| 268 | alarm(UPDATE_INTERVAL); |
| 269 | } |
| 270 | |
| 271 | void |
| 272 | stop_progress_meter(void) |
| 273 | { |
| 274 | alarm(0); |
| 275 | |
| 276 | if (!can_output()) |
| 277 | return; |
| 278 | |
| 279 | /* Ensure we complete the progress */ |
| 280 | if (cur_pos != end_pos) |
| 281 | refresh_progress_meter(); |
| 282 | |
| 283 | atomicio(vwrite, STDOUT_FILENO, "\n", 1); |
| 284 | } |
| 285 | |
| 286 | /*ARGSUSED*/ |
| 287 | static void |
| 288 | sig_winch(int sig) |
| 289 | { |
| 290 | win_resized = 1; |
| 291 | } |
| 292 | |
| 293 | static void |
| 294 | setscreensize(void) |
| 295 | { |
| 296 | struct winsize winsize; |
| 297 | |
| 298 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && |
| 299 | winsize.ws_col != 0) { |
| 300 | if (winsize.ws_col > MAX_WINSIZE) |
| 301 | win_size = MAX_WINSIZE; |
| 302 | else |
| 303 | win_size = winsize.ws_col; |
| 304 | } else |
| 305 | win_size = DEFAULT_WINSIZE; |
| 306 | win_size += 1; /* trailing \0 */ |
| 307 | } |