1 /* $OpenBSD: progressmeter.c,v 1.47 2019/01/24 16:52:17 dtucker Exp $ */
3 * Copyright (c) 2003 Nils Nordman. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
28 #include <sys/types.h>
29 #include <sys/ioctl.h>
40 #include "progressmeter.h"
45 #define DEFAULT_WINSIZE 80
46 #define MAX_WINSIZE 512
47 #define PADDING 1 /* padding between the progress indicators */
48 #define UPDATE_INTERVAL 1 /* update the progress meter every second */
49 #define STALL_TIME 5 /* we're stalled after this many seconds */
51 /* determines whether we can output to the terminal */
52 static int can_output(void);
54 /* formats and inserts the specified size into the given buffer */
55 static void format_size(char *, int, off_t);
56 static void format_rate(char *, int, off_t);
59 static void sig_winch(int);
60 static void setscreensize(void);
62 /* signal handler for updating the progress meter */
63 static void sig_alarm(int);
65 static double start; /* start progress */
66 static double last_update; /* last progress update */
67 static const char *file; /* name of the file being transferred */
68 static off_t start_pos; /* initial position of transfer */
69 static off_t end_pos; /* ending position of transfer */
70 static off_t cur_pos; /* transfer position as of last refresh */
71 static volatile off_t *counter; /* progress counter */
72 static long stalled; /* how long we have been stalled */
73 static int bytes_per_second; /* current speed in bytes per second */
74 static int win_size; /* terminal window size */
75 static volatile sig_atomic_t win_resized; /* for window resizing */
76 static volatile sig_atomic_t alarm_fired;
78 /* units for format_size */
79 static const char unit[] = " KMGT";
84 return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
88 format_rate(char *buf, int size, off_t bytes)
93 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
94 bytes = (bytes + 512) / 1024;
97 bytes = (bytes + 512) / 1024;
99 snprintf(buf, size, "%3lld.%1lld%c%s",
100 (long long) (bytes + 5) / 100,
101 (long long) (bytes + 5) / 10 % 10,
107 format_size(char *buf, int size, off_t bytes)
111 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
112 bytes = (bytes + 512) / 1024;
113 snprintf(buf, size, "%4lld%c%s",
120 refresh_progress_meter(int force_update)
122 char buf[MAX_WINSIZE + 1];
128 int hours, minutes, seconds;
131 if ((!force_update && !alarm_fired && !win_resized) || !can_output())
140 transferred = *counter - (cur_pos ? cur_pos : start_pos);
142 now = monotime_double();
143 bytes_left = end_pos - cur_pos;
146 elapsed = now - last_update;
148 elapsed = now - start;
149 /* Calculate true total speed when done */
150 transferred = end_pos - start_pos;
151 bytes_per_second = 0;
154 /* calculate speed */
156 cur_speed = (transferred / elapsed);
158 cur_speed = transferred;
160 #define AGE_FACTOR 0.9
161 if (bytes_per_second != 0) {
162 bytes_per_second = (bytes_per_second * AGE_FACTOR) +
163 (cur_speed * (1.0 - AGE_FACTOR));
165 bytes_per_second = cur_speed;
169 file_len = win_size - 36;
172 snmprintf(buf+1, sizeof(buf)-1 , &file_len, "%*s",
173 file_len * -1, file);
176 /* percent of transfer done */
177 if (end_pos == 0 || cur_pos == end_pos)
180 percent = ((float)cur_pos / end_pos) * 100;
181 snprintf(buf + strlen(buf), win_size - strlen(buf),
184 /* amount transferred */
185 format_size(buf + strlen(buf), win_size - strlen(buf),
187 strlcat(buf, " ", win_size);
189 /* bandwidth usage */
190 format_rate(buf + strlen(buf), win_size - strlen(buf),
191 (off_t)bytes_per_second);
192 strlcat(buf, "/s ", win_size);
200 if (stalled >= STALL_TIME)
201 strlcat(buf, "- stalled -", win_size);
202 else if (bytes_per_second == 0 && bytes_left)
203 strlcat(buf, " --:-- ETA", win_size);
206 seconds = bytes_left / bytes_per_second;
210 hours = seconds / 3600;
211 seconds -= hours * 3600;
212 minutes = seconds / 60;
213 seconds -= minutes * 60;
216 snprintf(buf + strlen(buf), win_size - strlen(buf),
217 "%d:%02d:%02d", hours, minutes, seconds);
219 snprintf(buf + strlen(buf), win_size - strlen(buf),
220 " %02d:%02d", minutes, seconds);
223 strlcat(buf, " ETA", win_size);
225 strlcat(buf, " ", win_size);
228 atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1);
234 sig_alarm(int ignore)
236 signal(SIGALRM, sig_alarm);
238 alarm(UPDATE_INTERVAL);
242 start_progress_meter(const char *f, off_t filesize, off_t *ctr)
244 start = last_update = monotime_double();
251 bytes_per_second = 0;
254 refresh_progress_meter(1);
256 signal(SIGALRM, sig_alarm);
257 signal(SIGWINCH, sig_winch);
258 alarm(UPDATE_INTERVAL);
262 stop_progress_meter(void)
269 /* Ensure we complete the progress */
270 if (cur_pos != end_pos)
271 refresh_progress_meter(1);
273 atomicio(vwrite, STDOUT_FILENO, "\n", 1);
280 signal(SIGWINCH, sig_winch);
287 struct winsize winsize;
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;
294 win_size = winsize.ws_col;
296 win_size = DEFAULT_WINSIZE;
297 win_size += 1; /* trailing \0 */