1 /* $NetBSD: progressbar.c,v 1.21 2009/04/12 10:18:52 lukem Exp $ */ 2 3 /*- 4 * SPDX-License-Identifier: BSD-2-Clause-NetBSD 5 * 6 * Copyright (c) 1997-2009 The NetBSD Foundation, Inc. 7 * All rights reserved. 8 * 9 * This code is derived from software contributed to The NetBSD Foundation 10 * by Luke Mewburn. 11 * 12 * Redistribution and use in source and binary forms, with or without 13 * modification, are permitted provided that the following conditions 14 * are met: 15 * 1. Redistributions of source code must retain the above copyright 16 * notice, this list of conditions and the following disclaimer. 17 * 2. Redistributions in binary form must reproduce the above copyright 18 * notice, this list of conditions and the following disclaimer in the 19 * documentation and/or other materials provided with the distribution. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 23 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 24 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 25 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 28 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 29 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 30 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 31 * POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 #include <sys/types.h> 35 #include <sys/param.h> 36 #include <sys/ioctl.h> 37 38 #include <errno.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 #include <termios.h> 43 #include <time.h> 44 #include <unistd.h> 45 46 #include <sys/cdefs.h> 47 __FBSDID("$FreeBSD$"); 48 49 #include "progress.h" 50 51 static const char * const suffixes[] = { 52 "", /* 2^0 (byte) */ 53 "KiB", /* 2^10 Kibibyte */ 54 "MiB", /* 2^20 Mebibyte */ 55 "GiB", /* 2^30 Gibibyte */ 56 "TiB", /* 2^40 Tebibyte */ 57 "PiB", /* 2^50 Pebibyte */ 58 "EiB", /* 2^60 Exbibyte */ 59 }; 60 61 #define NSUFFIXES nitems(suffixes) 62 #define SECSPERHOUR (60 * 60) 63 #define DEFAULT_TTYWIDTH 80 64 65 /* initialise progress meter structure */ 66 int 67 progress_init(progress_t *prog, const char *prefix, uint64_t total) 68 { 69 struct winsize winsize; 70 int oerrno = errno; 71 72 (void) memset(prog, 0x0, sizeof(*prog)); 73 prog->size = total; 74 prog->prefix = strdup(prefix); 75 prog->start = time(NULL); 76 if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && 77 winsize.ws_col != 0) { 78 prog->ttywidth = winsize.ws_col; 79 } else { 80 prog->ttywidth = DEFAULT_TTYWIDTH; 81 } 82 errno = oerrno; 83 return 1; 84 } 85 86 /* update the values in the progress meter */ 87 int 88 progress_update(progress_t *prog, uint64_t done) 89 { 90 prog->done = done; 91 prog->percent = (prog->done * 100) / prog->size; 92 prog->now = time(NULL); 93 prog->elapsed = prog->now - prog->start; 94 if (done == 0 || prog->elapsed == 0 || prog->done / prog->elapsed == 0) { 95 prog->eta = 0; 96 } else { 97 prog->eta = prog->size / (prog->done / prog->elapsed) - prog->elapsed; 98 } 99 return 1; 100 } 101 102 /* update the values in the progress meter */ 103 int 104 progress_reset_size(progress_t *prog, uint64_t size) 105 { 106 prog->size = size; 107 return 1; 108 } 109 110 /* make it look pretty at the end - display done bytes (usually total) */ 111 int 112 progress_complete(progress_t *prog, uint64_t done) 113 { 114 progress_update(prog, done); 115 progress_draw(prog); 116 printf("\n"); 117 return 1; 118 } 119 120 /* draw the progress meter */ 121 int 122 progress_draw(progress_t *prog) 123 { 124 #define BAROVERHEAD 45 /* non `*' portion of progress bar */ 125 /* 126 * stars should contain at least 127 * sizeof(buf) - BAROVERHEAD entries 128 */ 129 #define MIN_BAR_LEN 10 130 static const char stars[] = 131 "*****************************************************************************" 132 "*****************************************************************************" 133 "*****************************************************************************"; 134 unsigned bytesabbrev; 135 unsigned bpsabbrev; 136 int64_t secs; 137 uint64_t bytespersec; 138 uint64_t abbrevsize; 139 int64_t secsleft; 140 ssize_t barlength; 141 size_t starc; 142 char hours[12]; 143 char buf[256]; 144 int len; 145 int prefix_len; 146 147 prefix_len = strlen(prog->prefix); 148 barlength = MIN(sizeof(buf) - 1, (unsigned)prog->ttywidth) - 149 BAROVERHEAD - prefix_len; 150 if (barlength < MIN_BAR_LEN) { 151 int tmp_prefix_len; 152 /* 153 * In this case the TTY width is too small or the prefix is 154 * too large for a progress bar. We'll try decreasing the 155 * prefix length. 156 */ 157 barlength = MIN_BAR_LEN; 158 tmp_prefix_len = MIN(sizeof(buf) - 1,(unsigned)prog->ttywidth) - 159 BAROVERHEAD - MIN_BAR_LEN; 160 if (tmp_prefix_len > 0) 161 prefix_len = tmp_prefix_len; 162 else 163 prefix_len = 0; 164 } 165 starc = (barlength * prog->percent) / 100; 166 abbrevsize = prog->done; 167 for (bytesabbrev = 0; abbrevsize >= 100000 && bytesabbrev < NSUFFIXES; bytesabbrev++) { 168 abbrevsize >>= 10; 169 } 170 if (bytesabbrev == NSUFFIXES) { 171 bytesabbrev--; 172 } 173 bytespersec = 0; 174 if (prog->done > 0) { 175 bytespersec = prog->done; 176 if (prog->elapsed > 0) { 177 bytespersec /= prog->elapsed; 178 } 179 } 180 for (bpsabbrev = 1; bytespersec >= 1024000 && bpsabbrev < NSUFFIXES; bpsabbrev++) { 181 bytespersec >>= 10; 182 } 183 if (prog->done == 0 || prog->elapsed <= 0 || prog->done > prog->size) { 184 secsleft = 0; 185 } else { 186 secsleft = prog->eta; 187 } 188 if ((secs = secsleft / SECSPERHOUR) > 0) { 189 (void) snprintf(hours, sizeof(hours), "%2lld:", (long long)secs); 190 } else { 191 (void) snprintf(hours, sizeof(hours), " "); 192 } 193 secs = secsleft % SECSPERHOUR; 194 len = snprintf(buf, sizeof(buf), 195 "\r%.*s %3lld%% |%.*s%*s| %5lld %-3s %3lld.%02d %.2sB/s %s%02d:%02d ETA", 196 prefix_len, (prog->prefix) ? prog->prefix : "", 197 (long long)prog->percent, 198 (int)starc, stars, (int)(barlength - starc), "", 199 (long long)abbrevsize, 200 suffixes[bytesabbrev], 201 (long long)(bytespersec / 1024), 202 (int)((bytespersec % 1024) * 100 / 1024), 203 suffixes[bpsabbrev], 204 hours, 205 (int)secs / 60, (int)secs % 60); 206 return (int)write(STDOUT_FILENO, buf, len); 207 } 208