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028094f4 | 1 | /* $OpenBSD: progressmeter.c,v 1.30 2006/07/11 20:07:25 stevesk Exp $ */ |
c9c38b73 | 2 | /* |
178b1a1d | 3 | * Copyright (c) 2003 Nils Nordman. All rights reserved. |
c9c38b73 | 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 | ||
c9c38b73 | 26 | #include "includes.h" |
bd7c69ea | 27 | |
28 | #include <sys/ioctl.h> | |
c9c38b73 | 29 | |
028094f4 | 30 | #include <errno.h> |
ada68823 | 31 | #include <signal.h> |
32 | ||
b7fd001f | 33 | #include "progressmeter.h" |
178b1a1d | 34 | #include "atomicio.h" |
8d9bb5dd | 35 | #include "misc.h" |
c9c38b73 | 36 | |
178b1a1d | 37 | #define DEFAULT_WINSIZE 80 |
38 | #define MAX_WINSIZE 512 | |
39 | #define PADDING 1 /* padding between the progress indicators */ | |
40 | #define UPDATE_INTERVAL 1 /* update the progress meter every second */ | |
41 | #define STALL_TIME 5 /* we're stalled after this many seconds */ | |
c9c38b73 | 42 | |
178b1a1d | 43 | /* determines whether we can output to the terminal */ |
44 | static int can_output(void); | |
c9c38b73 | 45 | |
178b1a1d | 46 | /* formats and inserts the specified size into the given buffer */ |
47 | static void format_size(char *, int, off_t); | |
48 | static void format_rate(char *, int, off_t); | |
c9c38b73 | 49 | |
826563dc | 50 | /* window resizing */ |
51 | static void sig_winch(int); | |
52 | static void setscreensize(void); | |
53 | ||
178b1a1d | 54 | /* updates the progressmeter to reflect the current state of the transfer */ |
55 | void refresh_progress_meter(void); | |
c9c38b73 | 56 | |
178b1a1d | 57 | /* signal handler for updating the progress meter */ |
58 | static void update_progress_meter(int); | |
c9c38b73 | 59 | |
f2107e97 | 60 | static time_t start; /* start progress */ |
61 | static time_t last_update; /* last progress update */ | |
62 | static char *file; /* name of the file being transferred */ | |
63 | static off_t end_pos; /* ending position of transfer */ | |
64 | static off_t cur_pos; /* transfer position as of last refresh */ | |
178b1a1d | 65 | static volatile off_t *counter; /* progress counter */ |
f2107e97 | 66 | static long stalled; /* how long we have been stalled */ |
67 | static int bytes_per_second; /* current speed in bytes per second */ | |
68 | static int win_size; /* terminal window size */ | |
826563dc | 69 | static volatile sig_atomic_t win_resized; /* for window resizing */ |
c9c38b73 | 70 | |
178b1a1d | 71 | /* units for format_size */ |
72 | static const char unit[] = " KMGT"; | |
c9c38b73 | 73 | |
178b1a1d | 74 | static int |
75 | can_output(void) | |
76 | { | |
77 | return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); | |
78 | } | |
c9c38b73 | 79 | |
178b1a1d | 80 | static void |
81 | format_rate(char *buf, int size, off_t bytes) | |
82 | { | |
83 | int i; | |
84 | ||
85 | bytes *= 100; | |
86 | for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) | |
87 | bytes = (bytes + 512) / 1024; | |
88 | if (i == 0) { | |
89 | i++; | |
90 | bytes = (bytes + 512) / 1024; | |
91 | } | |
92 | snprintf(buf, size, "%3lld.%1lld%c%s", | |
419094c6 | 93 | (long long) (bytes + 5) / 100, |
94 | (long long) (bytes + 5) / 10 % 10, | |
178b1a1d | 95 | unit[i], |
96 | i ? "B" : " "); | |
97 | } | |
c9c38b73 | 98 | |
178b1a1d | 99 | static void |
100 | format_size(char *buf, int size, off_t bytes) | |
101 | { | |
102 | int i; | |
103 | ||
104 | for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) | |
105 | bytes = (bytes + 512) / 1024; | |
106 | snprintf(buf, size, "%4lld%c%s", | |
419094c6 | 107 | (long long) bytes, |
178b1a1d | 108 | unit[i], |
109 | i ? "B" : " "); | |
110 | } | |
c9c38b73 | 111 | |
112 | void | |
178b1a1d | 113 | refresh_progress_meter(void) |
c9c38b73 | 114 | { |
178b1a1d | 115 | char buf[MAX_WINSIZE + 1]; |
116 | time_t now; | |
117 | off_t transferred; | |
118 | double elapsed; | |
119 | int percent; | |
7b0a59c9 | 120 | off_t bytes_left; |
178b1a1d | 121 | int cur_speed; |
122 | int hours, minutes, seconds; | |
123 | int i, len; | |
124 | int file_len; | |
125 | ||
126 | transferred = *counter - cur_pos; | |
127 | cur_pos = *counter; | |
128 | now = time(NULL); | |
129 | bytes_left = end_pos - cur_pos; | |
130 | ||
131 | if (bytes_left > 0) | |
132 | elapsed = now - last_update; | |
adfde93f | 133 | else { |
178b1a1d | 134 | elapsed = now - start; |
adfde93f | 135 | /* Calculate true total speed when done */ |
136 | transferred = end_pos; | |
137 | bytes_per_second = 0; | |
138 | } | |
c9c38b73 | 139 | |
178b1a1d | 140 | /* calculate speed */ |
141 | if (elapsed != 0) | |
142 | cur_speed = (transferred / elapsed); | |
143 | else | |
adfde93f | 144 | cur_speed = transferred; |
c9c38b73 | 145 | |
178b1a1d | 146 | #define AGE_FACTOR 0.9 |
147 | if (bytes_per_second != 0) { | |
148 | bytes_per_second = (bytes_per_second * AGE_FACTOR) + | |
149 | (cur_speed * (1.0 - AGE_FACTOR)); | |
150 | } else | |
151 | bytes_per_second = cur_speed; | |
152 | ||
153 | /* filename */ | |
154 | buf[0] = '\0'; | |
155 | file_len = win_size - 35; | |
156 | if (file_len > 0) { | |
8e382949 | 157 | len = snprintf(buf, file_len + 1, "\r%s", file); |
3845a9ac | 158 | if (len < 0) |
159 | len = 0; | |
4b826d75 | 160 | if (len >= file_len + 1) |
161 | len = file_len; | |
178b1a1d | 162 | for (i = len; i < file_len; i++ ) |
163 | buf[i] = ' '; | |
164 | buf[file_len] = '\0'; | |
165 | } | |
c9c38b73 | 166 | |
178b1a1d | 167 | /* percent of transfer done */ |
168 | if (end_pos != 0) | |
169 | percent = ((float)cur_pos / end_pos) * 100; | |
170 | else | |
171 | percent = 100; | |
172 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
173 | " %3d%% ", percent); | |
174 | ||
175 | /* amount transferred */ | |
176 | format_size(buf + strlen(buf), win_size - strlen(buf), | |
177 | cur_pos); | |
178 | strlcat(buf, " ", win_size); | |
179 | ||
180 | /* bandwidth usage */ | |
181 | format_rate(buf + strlen(buf), win_size - strlen(buf), | |
f6be21a0 | 182 | (off_t)bytes_per_second); |
178b1a1d | 183 | strlcat(buf, "/s ", win_size); |
184 | ||
185 | /* ETA */ | |
186 | if (!transferred) | |
187 | stalled += elapsed; | |
188 | else | |
189 | stalled = 0; | |
190 | ||
191 | if (stalled >= STALL_TIME) | |
192 | strlcat(buf, "- stalled -", win_size); | |
193 | else if (bytes_per_second == 0 && bytes_left) | |
194 | strlcat(buf, " --:-- ETA", win_size); | |
195 | else { | |
196 | if (bytes_left > 0) | |
197 | seconds = bytes_left / bytes_per_second; | |
198 | else | |
199 | seconds = elapsed; | |
200 | ||
201 | hours = seconds / 3600; | |
202 | seconds -= hours * 3600; | |
203 | minutes = seconds / 60; | |
204 | seconds -= minutes * 60; | |
205 | ||
206 | if (hours != 0) | |
207 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
208 | "%d:%02d:%02d", hours, minutes, seconds); | |
209 | else | |
210 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
211 | " %02d:%02d", minutes, seconds); | |
212 | ||
213 | if (bytes_left > 0) | |
214 | strlcat(buf, " ETA", win_size); | |
215 | else | |
216 | strlcat(buf, " ", win_size); | |
217 | } | |
218 | ||
0469be42 | 219 | atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); |
178b1a1d | 220 | last_update = now; |
c9c38b73 | 221 | } |
222 | ||
223 | static void | |
224 | update_progress_meter(int ignore) | |
225 | { | |
178b1a1d | 226 | int save_errno; |
227 | ||
228 | save_errno = errno; | |
229 | ||
826563dc | 230 | if (win_resized) { |
231 | setscreensize(); | |
232 | win_resized = 0; | |
233 | } | |
178b1a1d | 234 | if (can_output()) |
235 | refresh_progress_meter(); | |
c9c38b73 | 236 | |
f00d1f78 | 237 | signal(SIGALRM, update_progress_meter); |
178b1a1d | 238 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 239 | errno = save_errno; |
240 | } | |
241 | ||
178b1a1d | 242 | void |
ca75d7de | 243 | start_progress_meter(char *f, off_t filesize, off_t *ctr) |
c9c38b73 | 244 | { |
178b1a1d | 245 | start = last_update = time(NULL); |
246 | file = f; | |
247 | end_pos = filesize; | |
248 | cur_pos = 0; | |
ca75d7de | 249 | counter = ctr; |
178b1a1d | 250 | stalled = 0; |
251 | bytes_per_second = 0; | |
252 | ||
826563dc | 253 | setscreensize(); |
178b1a1d | 254 | if (can_output()) |
255 | refresh_progress_meter(); | |
c9c38b73 | 256 | |
f00d1f78 | 257 | signal(SIGALRM, update_progress_meter); |
826563dc | 258 | signal(SIGWINCH, sig_winch); |
178b1a1d | 259 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 260 | } |
261 | ||
178b1a1d | 262 | void |
263 | stop_progress_meter(void) | |
c9c38b73 | 264 | { |
178b1a1d | 265 | alarm(0); |
c9c38b73 | 266 | |
178b1a1d | 267 | if (!can_output()) |
268 | return; | |
269 | ||
270 | /* Ensure we complete the progress */ | |
271 | if (cur_pos != end_pos) | |
272 | refresh_progress_meter(); | |
273 | ||
274 | atomicio(vwrite, STDOUT_FILENO, "\n", 1); | |
c9c38b73 | 275 | } |
826563dc | 276 | |
3efa8ea9 | 277 | /*ARGSUSED*/ |
826563dc | 278 | static void |
279 | sig_winch(int sig) | |
280 | { | |
281 | win_resized = 1; | |
282 | } | |
283 | ||
284 | static void | |
285 | setscreensize(void) | |
286 | { | |
287 | struct winsize winsize; | |
288 | ||
289 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && | |
290 | winsize.ws_col != 0) { | |
291 | if (winsize.ws_col > MAX_WINSIZE) | |
292 | win_size = MAX_WINSIZE; | |
293 | else | |
294 | win_size = winsize.ws_col; | |
295 | } else | |
296 | win_size = DEFAULT_WINSIZE; | |
297 | win_size += 1; /* trailing \0 */ | |
298 | } |