1 /* vi: set sw=4 ts=4: */ 2 /* 3 * Progress bar code. 4 */ 5 /* Original copyright notice which applies to the CONFIG_FEATURE_WGET_STATUSBAR stuff, 6 * much of which was blatantly stolen from openssh. 7 */ 8 /*- 9 * Copyright (c) 1992, 1993 10 * The Regents of the University of California. All rights reserved. 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 * 3. BSD Advertising Clause omitted per the July 22, 1999 licensing change 22 * ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change 23 * 24 * 4. Neither the name of the University nor the names of its contributors 25 * may be used to endorse or promote products derived from this software 26 * without specific prior written permission. 27 * 28 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 29 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 31 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 38 * SUCH DAMAGE. 39 */ 40 #include <sys/types.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <limits.h> 44 #include <string.h> 45 #include <libubox/utils.h> 46 #include "progress.h" 47 48 enum { 49 /* Seconds when xfer considered "stalled" */ 50 STALLTIME = 5 51 }; 52 53 static int 54 wh_helper(int value, int def_val, const char *env_name) 55 { 56 if (value == 0) { 57 char *s = getenv(env_name); 58 if (s) 59 value = atoi(s); 60 } 61 if (value <= 1 || value >= 30000) 62 value = def_val; 63 return value; 64 } 65 66 static unsigned int 67 get_tty2_width(void) 68 { 69 #ifndef TIOCGWINSZ 70 return wh_helper(0, 80, "COLUMNS"); 71 #else 72 struct winsize win = {0}; 73 ioctl(2, TIOCGWINSZ, &win); 74 return wh_helper(win.ws_col, 80, "COLUMNS"); 75 #endif 76 } 77 78 static unsigned int 79 monotonic_sec(void) 80 { 81 struct timespec tv; 82 clock_gettime(CLOCK_MONOTONIC, &tv); 83 return tv.tv_sec; 84 } 85 86 void 87 progress_init(struct progress *p, const char *curfile) 88 { 89 p->curfile = strdup(curfile); 90 p->start_sec = monotonic_sec(); 91 p->last_update_sec = p->start_sec; 92 p->last_change_sec = p->start_sec; 93 p->last_size = 0; 94 } 95 96 /* File already had beg_size bytes. 97 * Then we started downloading. 98 * We downloaded "transferred" bytes so far. 99 * Download is expected to stop when total size (beg_size + transferred) 100 * will be "totalsize" bytes. 101 * If totalsize == 0, then it is unknown. 102 */ 103 void 104 progress_update(struct progress *p, off_t beg_size, 105 off_t transferred, off_t totalsize) 106 { 107 off_t beg_and_transferred; 108 unsigned since_last_update, elapsed; 109 int barlength; 110 int kiloscale; 111 112 //transferred = 1234; /* use for stall detection testing */ 113 //totalsize = 0; /* use for unknown size download testing */ 114 115 elapsed = monotonic_sec(); 116 since_last_update = elapsed - p->last_update_sec; 117 p->last_update_sec = elapsed; 118 119 if (totalsize != 0 && transferred >= totalsize - beg_size) { 120 /* Last call. Do not skip this update */ 121 transferred = totalsize - beg_size; /* sanitize just in case */ 122 } 123 else if (since_last_update == 0) { 124 /* 125 * Do not update on every call 126 * (we can be called on every network read!) 127 */ 128 return; 129 } 130 131 kiloscale = 0; 132 /* 133 * Scale sizes down if they are close to overflowing. 134 * This allows calculations like (100 * transferred / totalsize) 135 * without risking overflow: we guarantee 10 highest bits to be 0. 136 * Introduced error is less than 1 / 2^12 ~= 0.025% 137 */ 138 if (ULONG_MAX > 0xffffffff || sizeof(off_t) == 4 || sizeof(off_t) != 8) { 139 /* 140 * 64-bit CPU || small off_t: in either case, 141 * >> is cheap, single-word operation. 142 * ... || strange off_t: also use this code 143 * (it is safe, just suboptimal wrt code size), 144 * because 32/64 optimized one works only for 64-bit off_t. 145 */ 146 if (totalsize >= (1 << 22)) { 147 totalsize >>= 10; 148 beg_size >>= 10; 149 transferred >>= 10; 150 kiloscale = 1; 151 } 152 } else { 153 /* 32-bit CPU and 64-bit off_t. 154 * Use a 40-bit shift, it is easier to do on 32-bit CPU. 155 */ 156 /* ONE suppresses "warning: shift count >= width of type" */ 157 #define ONE (sizeof(off_t) > 4) 158 if (totalsize >= (off_t)(1ULL << 54*ONE)) { 159 totalsize = (uint32_t)(totalsize >> 32*ONE) >> 8; 160 beg_size = (uint32_t)(beg_size >> 32*ONE) >> 8; 161 transferred = (uint32_t)(transferred >> 32*ONE) >> 8; 162 kiloscale = 4; 163 } 164 } 165 166 fprintf(stderr, "\r%-20.20s", p->curfile); 167 168 beg_and_transferred = beg_size + transferred; 169 170 if (totalsize != 0) { 171 unsigned ratio = 100 * beg_and_transferred / totalsize; 172 fprintf(stderr, "%4u%%", ratio); 173 174 barlength = get_tty2_width() - 49; 175 if (barlength > 0) { 176 /* god bless gcc for variable arrays :) */ 177 char buf[barlength + 1]; 178 unsigned stars = (unsigned)barlength * beg_and_transferred / totalsize; 179 memset(buf, ' ', barlength); 180 buf[barlength] = '\0'; 181 memset(buf, '*', stars); 182 fprintf(stderr, " |%s|", buf); 183 } 184 } 185 186 while (beg_and_transferred >= 100000) { 187 beg_and_transferred >>= 10; 188 kiloscale++; 189 } 190 /* see http://en.wikipedia.org/wiki/Tera */ 191 fprintf(stderr, "%6u%c", (unsigned)beg_and_transferred, " kMGTPEZY"[kiloscale]); 192 193 since_last_update = elapsed - p->last_change_sec; 194 if ((unsigned)transferred != p->last_size) { 195 p->last_change_sec = elapsed; 196 p->last_size = (unsigned)transferred; 197 if (since_last_update >= STALLTIME) { 198 /* We "cut out" these seconds from elapsed time 199 * by adjusting start time */ 200 p->start_sec += since_last_update; 201 } 202 since_last_update = 0; /* we are un-stalled now */ 203 } 204 205 elapsed -= p->start_sec; /* now it's "elapsed since start" */ 206 207 if (since_last_update >= STALLTIME) { 208 fprintf(stderr, " - stalled -"); 209 } else if (!totalsize || !transferred || (int)elapsed < 0) { 210 fprintf(stderr, " --:--:-- ETA"); 211 } else { 212 unsigned eta, secs, hours; 213 214 totalsize -= beg_size; /* now it's "total to upload" */ 215 216 /* Estimated remaining time = 217 * estimated_sec_to_dl_totalsize_bytes - elapsed_sec = 218 * totalsize / average_bytes_sec_so_far - elapsed = 219 * totalsize / (transferred/elapsed) - elapsed = 220 * totalsize * elapsed / transferred - elapsed 221 */ 222 eta = totalsize * elapsed / transferred - elapsed; 223 if (eta >= 1000*60*60) 224 eta = 1000*60*60 - 1; 225 secs = eta % 3600; 226 hours = eta / 3600; 227 fprintf(stderr, "%3u:%02u:%02u ETA", hours, secs / 60, secs % 60); 228 } 229 } 230
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