1 /* $OpenBSD: progressmeter.c,v 1.35 2006/08/01 23:22:47 stevesk 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>
38 #include "progressmeter.h"
42 #define DEFAULT_WINSIZE 80
43 #define MAX_WINSIZE 512
44 #define PADDING 1 /* padding between the progress indicators */
45 #define UPDATE_INTERVAL 1 /* update the progress meter every second */
46 #define STALL_TIME 5 /* we're stalled after this many seconds */
48 /* determines whether we can output to the terminal */
49 static int can_output(void);
51 /* formats and inserts the specified size into the given buffer */
52 static void format_size(char *, int, off_t);
53 static void format_rate(char *, int, off_t);
56 static void sig_winch(int);
57 static void setscreensize(void);
59 /* updates the progressmeter to reflect the current state of the transfer */
60 void refresh_progress_meter(void);
62 /* signal handler for updating the progress meter */
63 static void update_progress_meter(int);
65 static time_t start; /* start progress */
66 static time_t last_update; /* last progress update */
67 static char *file; /* name of the file being transferred */
68 static off_t end_pos; /* ending position of transfer */
69 static off_t cur_pos; /* transfer position as of last refresh */
70 static volatile off_t *counter; /* progress counter */
71 static long stalled; /* how long we have been stalled */
72 static int bytes_per_second; /* current speed in bytes per second */
73 static int win_size; /* terminal window size */
74 static volatile sig_atomic_t win_resized; /* for window resizing */
76 /* units for format_size */
77 static const char unit[] = " KMGT";
82 return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
86 format_rate(char *buf, int size, off_t bytes)
91 for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
92 bytes = (bytes + 512) / 1024;
95 bytes = (bytes + 512) / 1024;
97 snprintf(buf, size, "%3lld.%1lld%c%s",
98 (long long) (bytes + 5) / 100,
99 (long long) (bytes + 5) / 10 % 10,
105 format_size(char *buf, int size, off_t bytes)
109 for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
110 bytes = (bytes + 512) / 1024;
111 snprintf(buf, size, "%4lld%c%s",
118 refresh_progress_meter(void)
120 char buf[MAX_WINSIZE + 1];
127 int hours, minutes, seconds;
131 transferred = *counter - cur_pos;
134 bytes_left = end_pos - cur_pos;
137 elapsed = now - last_update;
139 elapsed = now - start;
140 /* Calculate true total speed when done */
141 transferred = end_pos;
142 bytes_per_second = 0;
145 /* calculate speed */
147 cur_speed = (transferred / elapsed);
149 cur_speed = transferred;
151 #define AGE_FACTOR 0.9
152 if (bytes_per_second != 0) {
153 bytes_per_second = (bytes_per_second * AGE_FACTOR) +
154 (cur_speed * (1.0 - AGE_FACTOR));
156 bytes_per_second = cur_speed;
160 file_len = win_size - 35;
162 len = snprintf(buf, file_len + 1, "\r%s", file);
165 if (len >= file_len + 1)
167 for (i = len; i < file_len; i++ )
169 buf[file_len] = '\0';
172 /* percent of transfer done */
174 percent = ((float)cur_pos / end_pos) * 100;
177 snprintf(buf + strlen(buf), win_size - strlen(buf),
180 /* amount transferred */
181 format_size(buf + strlen(buf), win_size - strlen(buf),
183 strlcat(buf, " ", win_size);
185 /* bandwidth usage */
186 format_rate(buf + strlen(buf), win_size - strlen(buf),
187 (off_t)bytes_per_second);
188 strlcat(buf, "/s ", win_size);
196 if (stalled >= STALL_TIME)
197 strlcat(buf, "- stalled -", win_size);
198 else if (bytes_per_second == 0 && bytes_left)
199 strlcat(buf, " --:-- ETA", win_size);
202 seconds = bytes_left / bytes_per_second;
206 hours = seconds / 3600;
207 seconds -= hours * 3600;
208 minutes = seconds / 60;
209 seconds -= minutes * 60;
212 snprintf(buf + strlen(buf), win_size - strlen(buf),
213 "%d:%02d:%02d", hours, minutes, seconds);
215 snprintf(buf + strlen(buf), win_size - strlen(buf),
216 " %02d:%02d", minutes, seconds);
219 strlcat(buf, " ETA", win_size);
221 strlcat(buf, " ", win_size);
224 atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1);
230 update_progress_meter(int ignore)
241 refresh_progress_meter();
243 signal(SIGALRM, update_progress_meter);
244 alarm(UPDATE_INTERVAL);
249 start_progress_meter(char *f, off_t filesize, off_t *ctr)
251 start = last_update = time(NULL);
257 bytes_per_second = 0;
261 refresh_progress_meter();
263 signal(SIGALRM, update_progress_meter);
264 signal(SIGWINCH, sig_winch);
265 alarm(UPDATE_INTERVAL);
269 stop_progress_meter(void)
276 /* Ensure we complete the progress */
277 if (cur_pos != end_pos)
278 refresh_progress_meter();
280 atomicio(vwrite, STDOUT_FILENO, "\n", 1);
293 struct winsize winsize;
295 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
296 winsize.ws_col != 0) {
297 if (winsize.ws_col > MAX_WINSIZE)
298 win_size = MAX_WINSIZE;
300 win_size = winsize.ws_col;
302 win_size = DEFAULT_WINSIZE;
303 win_size += 1; /* trailing \0 */