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c9c38b73 | 1 | /* |
178b1a1d | 2 | * Copyright (c) 2003 Nils Nordman. All rights reserved. |
c9c38b73 | 3 | * |
4 | * Redistribution and use in source and binary forms, with or without | |
5 | * modification, are permitted provided that the following conditions | |
6 | * are met: | |
7 | * 1. Redistributions of source code must retain the above copyright | |
8 | * notice, this list of conditions and the following disclaimer. | |
9 | * 2. Redistributions in binary form must reproduce the above copyright | |
10 | * notice, this list of conditions and the following disclaimer in the | |
11 | * documentation and/or other materials provided with the distribution. | |
12 | * | |
13 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
15 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
16 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
17 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
18 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
19 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
20 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
21 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
22 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
23 | */ | |
24 | ||
c9c38b73 | 25 | #include "includes.h" |
f6be21a0 | 26 | RCSID("$OpenBSD: progressmeter.c,v 1.20 2004/05/11 19:01:43 deraadt Exp $"); |
c9c38b73 | 27 | |
b7fd001f | 28 | #include "progressmeter.h" |
178b1a1d | 29 | #include "atomicio.h" |
8d9bb5dd | 30 | #include "misc.h" |
c9c38b73 | 31 | |
178b1a1d | 32 | #define DEFAULT_WINSIZE 80 |
33 | #define MAX_WINSIZE 512 | |
34 | #define PADDING 1 /* padding between the progress indicators */ | |
35 | #define UPDATE_INTERVAL 1 /* update the progress meter every second */ | |
36 | #define STALL_TIME 5 /* we're stalled after this many seconds */ | |
c9c38b73 | 37 | |
178b1a1d | 38 | /* determines whether we can output to the terminal */ |
39 | static int can_output(void); | |
c9c38b73 | 40 | |
178b1a1d | 41 | /* formats and inserts the specified size into the given buffer */ |
42 | static void format_size(char *, int, off_t); | |
43 | static void format_rate(char *, int, off_t); | |
c9c38b73 | 44 | |
178b1a1d | 45 | /* updates the progressmeter to reflect the current state of the transfer */ |
46 | void refresh_progress_meter(void); | |
c9c38b73 | 47 | |
178b1a1d | 48 | /* signal handler for updating the progress meter */ |
49 | static void update_progress_meter(int); | |
c9c38b73 | 50 | |
178b1a1d | 51 | static time_t start; /* start progress */ |
52 | static time_t last_update; /* last progress update */ | |
53 | static char *file; /* name of the file being transferred */ | |
54 | static off_t end_pos; /* ending position of transfer */ | |
55 | static off_t cur_pos; /* transfer position as of last refresh */ | |
56 | static volatile off_t *counter; /* progress counter */ | |
57 | static long stalled; /* how long we have been stalled */ | |
58 | static int bytes_per_second; /* current speed in bytes per second */ | |
59 | static int win_size; /* terminal window size */ | |
c9c38b73 | 60 | |
178b1a1d | 61 | /* units for format_size */ |
62 | static const char unit[] = " KMGT"; | |
c9c38b73 | 63 | |
178b1a1d | 64 | static int |
65 | can_output(void) | |
66 | { | |
67 | return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); | |
68 | } | |
c9c38b73 | 69 | |
178b1a1d | 70 | static void |
71 | format_rate(char *buf, int size, off_t bytes) | |
72 | { | |
73 | int i; | |
74 | ||
75 | bytes *= 100; | |
76 | for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) | |
77 | bytes = (bytes + 512) / 1024; | |
78 | if (i == 0) { | |
79 | i++; | |
80 | bytes = (bytes + 512) / 1024; | |
81 | } | |
82 | snprintf(buf, size, "%3lld.%1lld%c%s", | |
81b161c2 | 83 | (int64_t) (bytes + 5) / 100, |
178b1a1d | 84 | (int64_t) (bytes + 5) / 10 % 10, |
85 | unit[i], | |
86 | i ? "B" : " "); | |
87 | } | |
c9c38b73 | 88 | |
178b1a1d | 89 | static void |
90 | format_size(char *buf, int size, off_t bytes) | |
91 | { | |
92 | int i; | |
93 | ||
94 | for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) | |
95 | bytes = (bytes + 512) / 1024; | |
96 | snprintf(buf, size, "%4lld%c%s", | |
97 | (int64_t) bytes, | |
98 | unit[i], | |
99 | i ? "B" : " "); | |
100 | } | |
c9c38b73 | 101 | |
102 | void | |
178b1a1d | 103 | refresh_progress_meter(void) |
c9c38b73 | 104 | { |
178b1a1d | 105 | char buf[MAX_WINSIZE + 1]; |
106 | time_t now; | |
107 | off_t transferred; | |
108 | double elapsed; | |
109 | int percent; | |
7b0a59c9 | 110 | off_t bytes_left; |
178b1a1d | 111 | int cur_speed; |
112 | int hours, minutes, seconds; | |
113 | int i, len; | |
114 | int file_len; | |
115 | ||
116 | transferred = *counter - cur_pos; | |
117 | cur_pos = *counter; | |
118 | now = time(NULL); | |
119 | bytes_left = end_pos - cur_pos; | |
120 | ||
121 | if (bytes_left > 0) | |
122 | elapsed = now - last_update; | |
adfde93f | 123 | else { |
178b1a1d | 124 | elapsed = now - start; |
adfde93f | 125 | /* Calculate true total speed when done */ |
126 | transferred = end_pos; | |
127 | bytes_per_second = 0; | |
128 | } | |
c9c38b73 | 129 | |
178b1a1d | 130 | /* calculate speed */ |
131 | if (elapsed != 0) | |
132 | cur_speed = (transferred / elapsed); | |
133 | else | |
adfde93f | 134 | cur_speed = transferred; |
c9c38b73 | 135 | |
178b1a1d | 136 | #define AGE_FACTOR 0.9 |
137 | if (bytes_per_second != 0) { | |
138 | bytes_per_second = (bytes_per_second * AGE_FACTOR) + | |
139 | (cur_speed * (1.0 - AGE_FACTOR)); | |
140 | } else | |
141 | bytes_per_second = cur_speed; | |
142 | ||
143 | /* filename */ | |
144 | buf[0] = '\0'; | |
145 | file_len = win_size - 35; | |
146 | if (file_len > 0) { | |
8e382949 | 147 | len = snprintf(buf, file_len + 1, "\r%s", file); |
3845a9ac | 148 | if (len < 0) |
149 | len = 0; | |
178b1a1d | 150 | for (i = len; i < file_len; i++ ) |
151 | buf[i] = ' '; | |
152 | buf[file_len] = '\0'; | |
153 | } | |
c9c38b73 | 154 | |
178b1a1d | 155 | /* percent of transfer done */ |
156 | if (end_pos != 0) | |
157 | percent = ((float)cur_pos / end_pos) * 100; | |
158 | else | |
159 | percent = 100; | |
160 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
161 | " %3d%% ", percent); | |
162 | ||
163 | /* amount transferred */ | |
164 | format_size(buf + strlen(buf), win_size - strlen(buf), | |
165 | cur_pos); | |
166 | strlcat(buf, " ", win_size); | |
167 | ||
168 | /* bandwidth usage */ | |
169 | format_rate(buf + strlen(buf), win_size - strlen(buf), | |
f6be21a0 | 170 | (off_t)bytes_per_second); |
178b1a1d | 171 | strlcat(buf, "/s ", win_size); |
172 | ||
173 | /* ETA */ | |
174 | if (!transferred) | |
175 | stalled += elapsed; | |
176 | else | |
177 | stalled = 0; | |
178 | ||
179 | if (stalled >= STALL_TIME) | |
180 | strlcat(buf, "- stalled -", win_size); | |
181 | else if (bytes_per_second == 0 && bytes_left) | |
182 | strlcat(buf, " --:-- ETA", win_size); | |
183 | else { | |
184 | if (bytes_left > 0) | |
185 | seconds = bytes_left / bytes_per_second; | |
186 | else | |
187 | seconds = elapsed; | |
188 | ||
189 | hours = seconds / 3600; | |
190 | seconds -= hours * 3600; | |
191 | minutes = seconds / 60; | |
192 | seconds -= minutes * 60; | |
193 | ||
194 | if (hours != 0) | |
195 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
196 | "%d:%02d:%02d", hours, minutes, seconds); | |
197 | else | |
198 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
199 | " %02d:%02d", minutes, seconds); | |
200 | ||
201 | if (bytes_left > 0) | |
202 | strlcat(buf, " ETA", win_size); | |
203 | else | |
204 | strlcat(buf, " ", win_size); | |
205 | } | |
206 | ||
0469be42 | 207 | atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); |
178b1a1d | 208 | last_update = now; |
c9c38b73 | 209 | } |
210 | ||
211 | static void | |
212 | update_progress_meter(int ignore) | |
213 | { | |
178b1a1d | 214 | int save_errno; |
215 | ||
216 | save_errno = errno; | |
217 | ||
218 | if (can_output()) | |
219 | refresh_progress_meter(); | |
c9c38b73 | 220 | |
f00d1f78 | 221 | signal(SIGALRM, update_progress_meter); |
178b1a1d | 222 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 223 | errno = save_errno; |
224 | } | |
225 | ||
178b1a1d | 226 | void |
227 | start_progress_meter(char *f, off_t filesize, off_t *stat) | |
c9c38b73 | 228 | { |
178b1a1d | 229 | struct winsize winsize; |
c9c38b73 | 230 | |
178b1a1d | 231 | start = last_update = time(NULL); |
232 | file = f; | |
233 | end_pos = filesize; | |
234 | cur_pos = 0; | |
235 | counter = stat; | |
236 | stalled = 0; | |
237 | bytes_per_second = 0; | |
238 | ||
239 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && | |
240 | winsize.ws_col != 0) { | |
241 | if (winsize.ws_col > MAX_WINSIZE) | |
242 | win_size = MAX_WINSIZE; | |
243 | else | |
244 | win_size = winsize.ws_col; | |
c9c38b73 | 245 | } else |
178b1a1d | 246 | win_size = DEFAULT_WINSIZE; |
247 | win_size += 1; /* trailing \0 */ | |
c9c38b73 | 248 | |
178b1a1d | 249 | if (can_output()) |
250 | refresh_progress_meter(); | |
c9c38b73 | 251 | |
f00d1f78 | 252 | signal(SIGALRM, update_progress_meter); |
178b1a1d | 253 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 254 | } |
255 | ||
178b1a1d | 256 | void |
257 | stop_progress_meter(void) | |
c9c38b73 | 258 | { |
178b1a1d | 259 | alarm(0); |
c9c38b73 | 260 | |
178b1a1d | 261 | if (!can_output()) |
262 | return; | |
263 | ||
264 | /* Ensure we complete the progress */ | |
265 | if (cur_pos != end_pos) | |
266 | refresh_progress_meter(); | |
267 | ||
268 | atomicio(vwrite, STDOUT_FILENO, "\n", 1); | |
c9c38b73 | 269 | } |