2 * Copyright (c) 2003 Nils Nordman. All rights reserved.
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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.
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.
27 #include <sys/ioctl.h>
31 #include "progressmeter.h"
35 #define DEFAULT_WINSIZE 80
36 #define MAX_WINSIZE 512
37 #define PADDING 1 /* padding between the progress indicators */
38 #define UPDATE_INTERVAL 1 /* update the progress meter every second */
39 #define STALL_TIME 5 /* we're stalled after this many seconds */
41 /* determines whether we can output to the terminal */
42 static int can_output(void);
44 /* formats and inserts the specified size into the given buffer */
45 static void format_size(char *, int, off_t);
46 static void format_rate(char *, int, off_t);
49 static void sig_winch(int);
50 static void setscreensize(void);
52 /* updates the progressmeter to reflect the current state of the transfer */
53 void refresh_progress_meter(void);
55 /* signal handler for updating the progress meter */
56 static void update_progress_meter(int);
58 static time_t start; /* start progress */
59 static time_t last_update; /* last progress update */
60 static char *file; /* name of the file being transferred */
61 static off_t end_pos; /* ending position of transfer */
62 static off_t cur_pos; /* transfer position as of last refresh */
63 static volatile off_t *counter; /* progress counter */
64 static long stalled; /* how long we have been stalled */
65 static int bytes_per_second; /* current speed in bytes per second */
66 static int win_size; /* terminal window size */
67 static volatile sig_atomic_t win_resized; /* for window resizing */
69 /* units for format_size */
70 static const char unit[] = " KMGT";
75 return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
79 format_rate(char *buf, int size, off_t bytes)
84 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
85 bytes = (bytes + 512) / 1024;
88 bytes = (bytes + 512) / 1024;
90 snprintf(buf, size, "%3lld.%1lld%c%s",
91 (long long) (bytes + 5) / 100,
92 (long long) (bytes + 5) / 10 % 10,
98 format_size(char *buf, int size, off_t bytes)
102 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
103 bytes = (bytes + 512) / 1024;
104 snprintf(buf, size, "%4lld%c%s",
111 refresh_progress_meter(void)
113 char buf[MAX_WINSIZE + 1];
120 int hours, minutes, seconds;
124 transferred = *counter - cur_pos;
127 bytes_left = end_pos - cur_pos;
130 elapsed = now - last_update;
132 elapsed = now - start;
133 /* Calculate true total speed when done */
134 transferred = end_pos;
135 bytes_per_second = 0;
138 /* calculate speed */
140 cur_speed = (transferred / elapsed);
142 cur_speed = transferred;
144 #define AGE_FACTOR 0.9
145 if (bytes_per_second != 0) {
146 bytes_per_second = (bytes_per_second * AGE_FACTOR) +
147 (cur_speed * (1.0 - AGE_FACTOR));
149 bytes_per_second = cur_speed;
153 file_len = win_size - 35;
155 len = snprintf(buf, file_len + 1, "\r%s", file);
158 if (len >= file_len + 1)
160 for (i = len; i < file_len; i++ )
162 buf[file_len] = '\0';
165 /* percent of transfer done */
167 percent = ((float)cur_pos / end_pos) * 100;
170 snprintf(buf + strlen(buf), win_size - strlen(buf),
173 /* amount transferred */
174 format_size(buf + strlen(buf), win_size - strlen(buf),
176 strlcat(buf, " ", win_size);
178 /* bandwidth usage */
179 format_rate(buf + strlen(buf), win_size - strlen(buf),
180 (off_t)bytes_per_second);
181 strlcat(buf, "/s ", win_size);
189 if (stalled >= STALL_TIME)
190 strlcat(buf, "- stalled -", win_size);
191 else if (bytes_per_second == 0 && bytes_left)
192 strlcat(buf, " --:-- ETA", win_size);
195 seconds = bytes_left / bytes_per_second;
199 hours = seconds / 3600;
200 seconds -= hours * 3600;
201 minutes = seconds / 60;
202 seconds -= minutes * 60;
205 snprintf(buf + strlen(buf), win_size - strlen(buf),
206 "%d:%02d:%02d", hours, minutes, seconds);
208 snprintf(buf + strlen(buf), win_size - strlen(buf),
209 " %02d:%02d", minutes, seconds);
212 strlcat(buf, " ETA", win_size);
214 strlcat(buf, " ", win_size);
217 atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1);
222 update_progress_meter(int ignore)
233 refresh_progress_meter();
235 signal(SIGALRM, update_progress_meter);
236 alarm(UPDATE_INTERVAL);
241 start_progress_meter(char *f, off_t filesize, off_t *ctr)
243 start = last_update = time(NULL);
249 bytes_per_second = 0;
253 refresh_progress_meter();
255 signal(SIGALRM, update_progress_meter);
256 signal(SIGWINCH, sig_winch);
257 alarm(UPDATE_INTERVAL);
261 stop_progress_meter(void)
268 /* Ensure we complete the progress */
269 if (cur_pos != end_pos)
270 refresh_progress_meter();
272 atomicio(vwrite, STDOUT_FILENO, "\n", 1);
285 struct winsize winsize;
287 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
288 winsize.ws_col != 0) {
289 if (winsize.ws_col > MAX_WINSIZE)
290 win_size = MAX_WINSIZE;
292 win_size = winsize.ws_col;
294 win_size = DEFAULT_WINSIZE;
295 win_size += 1; /* trailing \0 */