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