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5188ba17 | 1 | /* $OpenBSD: progressmeter.c,v 1.31 2006/07/17 01:31:09 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 | |
5188ba17 | 28 | #include <sys/types.h> |
bd7c69ea | 29 | #include <sys/ioctl.h> |
c9c38b73 | 30 | |
028094f4 | 31 | #include <errno.h> |
ada68823 | 32 | #include <signal.h> |
5188ba17 | 33 | #include <unistd.h> |
ada68823 | 34 | |
b7fd001f | 35 | #include "progressmeter.h" |
178b1a1d | 36 | #include "atomicio.h" |
8d9bb5dd | 37 | #include "misc.h" |
c9c38b73 | 38 | |
178b1a1d | 39 | #define DEFAULT_WINSIZE 80 |
40 | #define MAX_WINSIZE 512 | |
41 | #define PADDING 1 /* padding between the progress indicators */ | |
42 | #define UPDATE_INTERVAL 1 /* update the progress meter every second */ | |
43 | #define STALL_TIME 5 /* we're stalled after this many seconds */ | |
c9c38b73 | 44 | |
178b1a1d | 45 | /* determines whether we can output to the terminal */ |
46 | static int can_output(void); | |
c9c38b73 | 47 | |
178b1a1d | 48 | /* formats and inserts the specified size into the given buffer */ |
49 | static void format_size(char *, int, off_t); | |
50 | static void format_rate(char *, int, off_t); | |
c9c38b73 | 51 | |
826563dc | 52 | /* window resizing */ |
53 | static void sig_winch(int); | |
54 | static void setscreensize(void); | |
55 | ||
178b1a1d | 56 | /* updates the progressmeter to reflect the current state of the transfer */ |
57 | void refresh_progress_meter(void); | |
c9c38b73 | 58 | |
178b1a1d | 59 | /* signal handler for updating the progress meter */ |
60 | static void update_progress_meter(int); | |
c9c38b73 | 61 | |
f2107e97 | 62 | static time_t start; /* start progress */ |
63 | static time_t last_update; /* last progress update */ | |
64 | static char *file; /* name of the file being transferred */ | |
65 | static off_t end_pos; /* ending position of transfer */ | |
66 | static off_t cur_pos; /* transfer position as of last refresh */ | |
178b1a1d | 67 | static volatile off_t *counter; /* progress counter */ |
f2107e97 | 68 | static long stalled; /* how long we have been stalled */ |
69 | static int bytes_per_second; /* current speed in bytes per second */ | |
70 | static int win_size; /* terminal window size */ | |
826563dc | 71 | static volatile sig_atomic_t win_resized; /* for window resizing */ |
c9c38b73 | 72 | |
178b1a1d | 73 | /* units for format_size */ |
74 | static const char unit[] = " KMGT"; | |
c9c38b73 | 75 | |
178b1a1d | 76 | static int |
77 | can_output(void) | |
78 | { | |
79 | return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); | |
80 | } | |
c9c38b73 | 81 | |
178b1a1d | 82 | static void |
83 | format_rate(char *buf, int size, off_t bytes) | |
84 | { | |
85 | int i; | |
86 | ||
87 | bytes *= 100; | |
88 | for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) | |
89 | bytes = (bytes + 512) / 1024; | |
90 | if (i == 0) { | |
91 | i++; | |
92 | bytes = (bytes + 512) / 1024; | |
93 | } | |
94 | snprintf(buf, size, "%3lld.%1lld%c%s", | |
419094c6 | 95 | (long long) (bytes + 5) / 100, |
96 | (long long) (bytes + 5) / 10 % 10, | |
178b1a1d | 97 | unit[i], |
98 | i ? "B" : " "); | |
99 | } | |
c9c38b73 | 100 | |
178b1a1d | 101 | static void |
102 | format_size(char *buf, int size, off_t bytes) | |
103 | { | |
104 | int i; | |
105 | ||
106 | for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) | |
107 | bytes = (bytes + 512) / 1024; | |
108 | snprintf(buf, size, "%4lld%c%s", | |
419094c6 | 109 | (long long) bytes, |
178b1a1d | 110 | unit[i], |
111 | i ? "B" : " "); | |
112 | } | |
c9c38b73 | 113 | |
114 | void | |
178b1a1d | 115 | refresh_progress_meter(void) |
c9c38b73 | 116 | { |
178b1a1d | 117 | char buf[MAX_WINSIZE + 1]; |
118 | time_t now; | |
119 | off_t transferred; | |
120 | double elapsed; | |
121 | int percent; | |
7b0a59c9 | 122 | off_t bytes_left; |
178b1a1d | 123 | int cur_speed; |
124 | int hours, minutes, seconds; | |
125 | int i, len; | |
126 | int file_len; | |
127 | ||
128 | transferred = *counter - cur_pos; | |
129 | cur_pos = *counter; | |
130 | now = time(NULL); | |
131 | bytes_left = end_pos - cur_pos; | |
132 | ||
133 | if (bytes_left > 0) | |
134 | elapsed = now - last_update; | |
adfde93f | 135 | else { |
178b1a1d | 136 | elapsed = now - start; |
adfde93f | 137 | /* Calculate true total speed when done */ |
138 | transferred = end_pos; | |
139 | bytes_per_second = 0; | |
140 | } | |
c9c38b73 | 141 | |
178b1a1d | 142 | /* calculate speed */ |
143 | if (elapsed != 0) | |
144 | cur_speed = (transferred / elapsed); | |
145 | else | |
adfde93f | 146 | cur_speed = transferred; |
c9c38b73 | 147 | |
178b1a1d | 148 | #define AGE_FACTOR 0.9 |
149 | if (bytes_per_second != 0) { | |
150 | bytes_per_second = (bytes_per_second * AGE_FACTOR) + | |
151 | (cur_speed * (1.0 - AGE_FACTOR)); | |
152 | } else | |
153 | bytes_per_second = cur_speed; | |
154 | ||
155 | /* filename */ | |
156 | buf[0] = '\0'; | |
157 | file_len = win_size - 35; | |
158 | if (file_len > 0) { | |
8e382949 | 159 | len = snprintf(buf, file_len + 1, "\r%s", file); |
3845a9ac | 160 | if (len < 0) |
161 | len = 0; | |
4b826d75 | 162 | if (len >= file_len + 1) |
163 | len = file_len; | |
178b1a1d | 164 | for (i = len; i < file_len; i++ ) |
165 | buf[i] = ' '; | |
166 | buf[file_len] = '\0'; | |
167 | } | |
c9c38b73 | 168 | |
178b1a1d | 169 | /* percent of transfer done */ |
170 | if (end_pos != 0) | |
171 | percent = ((float)cur_pos / end_pos) * 100; | |
172 | else | |
173 | percent = 100; | |
174 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
175 | " %3d%% ", percent); | |
176 | ||
177 | /* amount transferred */ | |
178 | format_size(buf + strlen(buf), win_size - strlen(buf), | |
179 | cur_pos); | |
180 | strlcat(buf, " ", win_size); | |
181 | ||
182 | /* bandwidth usage */ | |
183 | format_rate(buf + strlen(buf), win_size - strlen(buf), | |
f6be21a0 | 184 | (off_t)bytes_per_second); |
178b1a1d | 185 | strlcat(buf, "/s ", win_size); |
186 | ||
187 | /* ETA */ | |
188 | if (!transferred) | |
189 | stalled += elapsed; | |
190 | else | |
191 | stalled = 0; | |
192 | ||
193 | if (stalled >= STALL_TIME) | |
194 | strlcat(buf, "- stalled -", win_size); | |
195 | else if (bytes_per_second == 0 && bytes_left) | |
196 | strlcat(buf, " --:-- ETA", win_size); | |
197 | else { | |
198 | if (bytes_left > 0) | |
199 | seconds = bytes_left / bytes_per_second; | |
200 | else | |
201 | seconds = elapsed; | |
202 | ||
203 | hours = seconds / 3600; | |
204 | seconds -= hours * 3600; | |
205 | minutes = seconds / 60; | |
206 | seconds -= minutes * 60; | |
207 | ||
208 | if (hours != 0) | |
209 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
210 | "%d:%02d:%02d", hours, minutes, seconds); | |
211 | else | |
212 | snprintf(buf + strlen(buf), win_size - strlen(buf), | |
213 | " %02d:%02d", minutes, seconds); | |
214 | ||
215 | if (bytes_left > 0) | |
216 | strlcat(buf, " ETA", win_size); | |
217 | else | |
218 | strlcat(buf, " ", win_size); | |
219 | } | |
220 | ||
0469be42 | 221 | atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); |
178b1a1d | 222 | last_update = now; |
c9c38b73 | 223 | } |
224 | ||
225 | static void | |
226 | update_progress_meter(int ignore) | |
227 | { | |
178b1a1d | 228 | int save_errno; |
229 | ||
230 | save_errno = errno; | |
231 | ||
826563dc | 232 | if (win_resized) { |
233 | setscreensize(); | |
234 | win_resized = 0; | |
235 | } | |
178b1a1d | 236 | if (can_output()) |
237 | refresh_progress_meter(); | |
c9c38b73 | 238 | |
f00d1f78 | 239 | signal(SIGALRM, update_progress_meter); |
178b1a1d | 240 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 241 | errno = save_errno; |
242 | } | |
243 | ||
178b1a1d | 244 | void |
ca75d7de | 245 | start_progress_meter(char *f, off_t filesize, off_t *ctr) |
c9c38b73 | 246 | { |
178b1a1d | 247 | start = last_update = time(NULL); |
248 | file = f; | |
249 | end_pos = filesize; | |
250 | cur_pos = 0; | |
ca75d7de | 251 | counter = ctr; |
178b1a1d | 252 | stalled = 0; |
253 | bytes_per_second = 0; | |
254 | ||
826563dc | 255 | setscreensize(); |
178b1a1d | 256 | if (can_output()) |
257 | refresh_progress_meter(); | |
c9c38b73 | 258 | |
f00d1f78 | 259 | signal(SIGALRM, update_progress_meter); |
826563dc | 260 | signal(SIGWINCH, sig_winch); |
178b1a1d | 261 | alarm(UPDATE_INTERVAL); |
c9c38b73 | 262 | } |
263 | ||
178b1a1d | 264 | void |
265 | stop_progress_meter(void) | |
c9c38b73 | 266 | { |
178b1a1d | 267 | alarm(0); |
c9c38b73 | 268 | |
178b1a1d | 269 | if (!can_output()) |
270 | return; | |
271 | ||
272 | /* Ensure we complete the progress */ | |
273 | if (cur_pos != end_pos) | |
274 | refresh_progress_meter(); | |
275 | ||
276 | atomicio(vwrite, STDOUT_FILENO, "\n", 1); | |
c9c38b73 | 277 | } |
826563dc | 278 | |
3efa8ea9 | 279 | /*ARGSUSED*/ |
826563dc | 280 | static void |
281 | sig_winch(int sig) | |
282 | { | |
283 | win_resized = 1; | |
284 | } | |
285 | ||
286 | static void | |
287 | setscreensize(void) | |
288 | { | |
289 | struct winsize winsize; | |
290 | ||
291 | if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && | |
292 | winsize.ws_col != 0) { | |
293 | if (winsize.ws_col > MAX_WINSIZE) | |
294 | win_size = MAX_WINSIZE; | |
295 | else | |
296 | win_size = winsize.ws_col; | |
297 | } else | |
298 | win_size = DEFAULT_WINSIZE; | |
299 | win_size += 1; /* trailing \0 */ | |
300 | } |