progressbar.c revision 1.11
1 /* $NetBSD: progressbar.c,v 1.11 2005/07/19 00:41:05 lukem Exp $ */ 2 3 /*- 4 * Copyright (c) 1997-2005 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 #ifndef lint 41 __RCSID("$NetBSD: progressbar.c,v 1.11 2005/07/19 00:41:05 lukem Exp $"); 42 #endif /* not lint */ 43 44 /* 45 * FTP User Program -- Misc support routines 46 */ 47 #include <sys/types.h> 48 #include <sys/param.h> 49 50 #include <err.h> 51 #include <errno.h> 52 #include <signal.h> 53 #include <stdio.h> 54 #include <stdlib.h> 55 #include <string.h> 56 #include <time.h> 57 #include <tzfile.h> 58 #include <unistd.h> 59 60 #include "progressbar.h" 61 62 #if !defined(NO_PROGRESS) 63 /* 64 * return non-zero if we're the current foreground process 65 */ 66 int 67 foregroundproc(void) 68 { 69 static pid_t pgrp = -1; 70 71 if (pgrp == -1) 72 pgrp = getpgrp(); 73 74 return (tcgetpgrp(fileno(ttyout)) == pgrp); 75 } 76 #endif /* !defined(NO_PROGRESS) */ 77 78 79 static void updateprogressmeter(int); 80 81 /* 82 * SIGALRM handler to update the progress meter 83 */ 84 static void 85 updateprogressmeter(int dummy) 86 { 87 int oerrno = errno; 88 89 progressmeter(0); 90 errno = oerrno; 91 } 92 93 /* 94 * List of order of magnitude prefixes. 95 * The last is `P', as 2^64 = 16384 Petabytes 96 */ 97 static const char prefixes[] = " KMGTP"; 98 99 /* 100 * Display a transfer progress bar if progress is non-zero. 101 * SIGALRM is hijacked for use by this function. 102 * - Before the transfer, set filesize to size of file (or -1 if unknown), 103 * and call with flag = -1. This starts the once per second timer, 104 * and a call to updateprogressmeter() upon SIGALRM. 105 * - During the transfer, updateprogressmeter will call progressmeter 106 * with flag = 0 107 * - After the transfer, call with flag = 1 108 */ 109 static struct timeval start; 110 static struct timeval lastupdate; 111 112 #define BUFLEFT (sizeof(buf) - len) 113 114 void 115 progressmeter(int flag) 116 { 117 static off_t lastsize; 118 off_t cursize; 119 struct timeval now, wait; 120 #ifndef NO_PROGRESS 121 struct timeval td; 122 off_t abbrevsize, bytespersec; 123 double elapsed; 124 int ratio, i, remaining, barlength; 125 126 /* 127 * Work variables for progress bar. 128 * 129 * XXX: if the format of the progress bar changes 130 * (especially the number of characters in the 131 * `static' portion of it), be sure to update 132 * these appropriately. 133 */ 134 #endif 135 size_t len; 136 char buf[256]; /* workspace for progress bar */ 137 #ifndef NO_PROGRESS 138 #define BAROVERHEAD 43 /* non `*' portion of progress bar */ 139 /* 140 * stars should contain at least 141 * sizeof(buf) - BAROVERHEAD entries 142 */ 143 static const char stars[] = 144 "*****************************************************************************" 145 "*****************************************************************************" 146 "*****************************************************************************"; 147 148 #endif 149 150 if (flag == -1) { 151 (void)gettimeofday(&start, NULL); 152 lastupdate = start; 153 lastsize = restart_point; 154 } 155 156 (void)gettimeofday(&now, NULL); 157 cursize = bytes + restart_point; 158 timersub(&now, &lastupdate, &wait); 159 if (cursize > lastsize) { 160 lastupdate = now; 161 lastsize = cursize; 162 wait.tv_sec = 0; 163 } else { 164 #ifndef STANDALONE_PROGRESS 165 if (quit_time > 0 && wait.tv_sec > quit_time) { 166 len = snprintf(buf, sizeof(buf), "\r\n%s: " 167 "transfer aborted because stalled for %lu sec.\r\n", 168 getprogname(), (unsigned long)wait.tv_sec); 169 (void)write(fileno(ttyout), buf, len); 170 (void)xsignal(SIGALRM, SIG_DFL); 171 alarmtimer(0); 172 siglongjmp(toplevel, 1); 173 } 174 #endif /* !STANDALONE_PROGRESS */ 175 } 176 /* 177 * Always set the handler even if we are not the foreground process. 178 */ 179 #ifdef STANDALONE_PROGRESS 180 if (progress) { 181 #else 182 if (quit_time > 0 || progress) { 183 #endif /* !STANDALONE_PROGRESS */ 184 if (flag == -1) { 185 (void)xsignal_restart(SIGALRM, updateprogressmeter, 1); 186 alarmtimer(1); /* set alarm timer for 1 Hz */ 187 } else if (flag == 1) { 188 (void)xsignal(SIGALRM, SIG_DFL); 189 alarmtimer(0); 190 } 191 } 192 #ifndef NO_PROGRESS 193 if (!progress) 194 return; 195 len = 0; 196 197 /* 198 * print progress bar only if we are foreground process. 199 */ 200 if (! foregroundproc()) 201 return; 202 203 len += snprintf(buf + len, BUFLEFT, "\r"); 204 if (prefix) 205 len += snprintf(buf + len, BUFLEFT, "%s", prefix); 206 if (filesize > 0) { 207 ratio = (int)((double)cursize * 100.0 / (double)filesize); 208 ratio = MAX(ratio, 0); 209 ratio = MIN(ratio, 100); 210 len += snprintf(buf + len, BUFLEFT, "%3d%% ", ratio); 211 212 /* 213 * calculate the length of the `*' bar, ensuring that 214 * the number of stars won't exceed the buffer size 215 */ 216 barlength = MIN(sizeof(buf) - 1, ttywidth) - BAROVERHEAD; 217 if (prefix) 218 barlength -= (int)strlen(prefix); 219 if (barlength > 0) { 220 i = barlength * ratio / 100; 221 len += snprintf(buf + len, BUFLEFT, 222 "|%.*s%*s|", i, stars, (int)(barlength - i), ""); 223 } 224 } 225 226 abbrevsize = cursize; 227 for (i = 0; abbrevsize >= 100000 && i < sizeof(prefixes); i++) 228 abbrevsize >>= 10; 229 len += snprintf(buf + len, BUFLEFT, " " LLFP("5") " %c%c ", 230 (LLT)abbrevsize, 231 prefixes[i], 232 i == 0 ? ' ' : 'B'); 233 234 timersub(&now, &start, &td); 235 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 236 237 bytespersec = 0; 238 if (bytes > 0) { 239 bytespersec = bytes; 240 if (elapsed > 0.0) 241 bytespersec /= elapsed; 242 } 243 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 244 bytespersec >>= 10; 245 len += snprintf(buf + len, BUFLEFT, 246 " " LLFP("3") ".%02d %cB/s ", 247 (LLT)(bytespersec / 1024), 248 (int)((bytespersec % 1024) * 100 / 1024), 249 prefixes[i]); 250 251 if (filesize > 0) { 252 if (bytes <= 0 || elapsed <= 0.0 || cursize > filesize) { 253 len += snprintf(buf + len, BUFLEFT, " --:-- ETA"); 254 } else if (wait.tv_sec >= STALLTIME) { 255 len += snprintf(buf + len, BUFLEFT, " - stalled -"); 256 } else { 257 remaining = (int) 258 ((filesize - restart_point) / (bytes / elapsed) - 259 elapsed); 260 if (remaining >= 100 * SECSPERHOUR) 261 len += snprintf(buf + len, BUFLEFT, 262 " --:-- ETA"); 263 else { 264 i = remaining / SECSPERHOUR; 265 if (i) 266 len += snprintf(buf + len, BUFLEFT, 267 "%2d:", i); 268 else 269 len += snprintf(buf + len, BUFLEFT, 270 " "); 271 i = remaining % SECSPERHOUR; 272 len += snprintf(buf + len, BUFLEFT, 273 "%02d:%02d ETA", i / 60, i % 60); 274 } 275 } 276 } 277 if (flag == 1) 278 len += snprintf(buf + len, BUFLEFT, "\n"); 279 (void)write(fileno(ttyout), buf, len); 280 281 #endif /* !NO_PROGRESS */ 282 } 283 284 #ifndef STANDALONE_PROGRESS 285 /* 286 * Display transfer statistics. 287 * Requires start to be initialised by progressmeter(-1), 288 * direction to be defined by xfer routines, and filesize and bytes 289 * to be updated by xfer routines 290 * If siginfo is nonzero, an ETA is displayed, and the output goes to stderr 291 * instead of ttyout. 292 */ 293 void 294 ptransfer(int siginfo) 295 { 296 struct timeval now, td, wait; 297 double elapsed; 298 off_t bytespersec; 299 int remaining, hh, i; 300 size_t len; 301 302 char buf[256]; /* Work variable for transfer status. */ 303 304 if (!verbose && !progress && !siginfo) 305 return; 306 307 (void)gettimeofday(&now, NULL); 308 timersub(&now, &start, &td); 309 elapsed = td.tv_sec + (td.tv_usec / 1000000.0); 310 bytespersec = 0; 311 if (bytes > 0) { 312 bytespersec = bytes; 313 if (elapsed > 0.0) 314 bytespersec /= elapsed; 315 } 316 len = 0; 317 len += snprintf(buf + len, BUFLEFT, LLF " byte%s %s in ", 318 (LLT)bytes, bytes == 1 ? "" : "s", direction); 319 remaining = (int)elapsed; 320 if (remaining > SECSPERDAY) { 321 int days; 322 323 days = remaining / SECSPERDAY; 324 remaining %= SECSPERDAY; 325 len += snprintf(buf + len, BUFLEFT, 326 "%d day%s ", days, days == 1 ? "" : "s"); 327 } 328 hh = remaining / SECSPERHOUR; 329 remaining %= SECSPERHOUR; 330 if (hh) 331 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 332 len += snprintf(buf + len, BUFLEFT, 333 "%02d:%02d ", remaining / 60, remaining % 60); 334 335 for (i = 1; bytespersec >= 1024000 && i < sizeof(prefixes); i++) 336 bytespersec >>= 10; 337 len += snprintf(buf + len, BUFLEFT, "(" LLF ".%02d %cB/s)", 338 (LLT)(bytespersec / 1024), 339 (int)((bytespersec % 1024) * 100 / 1024), 340 prefixes[i]); 341 342 if (siginfo && bytes > 0 && elapsed > 0.0 && filesize >= 0 343 && bytes + restart_point <= filesize) { 344 remaining = (int)((filesize - restart_point) / 345 (bytes / elapsed) - elapsed); 346 hh = remaining / SECSPERHOUR; 347 remaining %= SECSPERHOUR; 348 len += snprintf(buf + len, BUFLEFT, " ETA: "); 349 if (hh) 350 len += snprintf(buf + len, BUFLEFT, "%2d:", hh); 351 len += snprintf(buf + len, BUFLEFT, "%02d:%02d", 352 remaining / 60, remaining % 60); 353 timersub(&now, &lastupdate, &wait); 354 if (wait.tv_sec >= STALLTIME) 355 len += snprintf(buf + len, BUFLEFT, " (stalled)"); 356 } 357 len += snprintf(buf + len, BUFLEFT, "\n"); 358 (void)write(siginfo ? STDERR_FILENO : fileno(ttyout), buf, len); 359 } 360 361 /* 362 * SIG{INFO,QUIT} handler to print transfer stats if a transfer is in progress 363 */ 364 void 365 psummary(int notused) 366 { 367 int oerrno = errno; 368 369 if (bytes > 0) { 370 if (fromatty) 371 write(fileno(ttyout), "\n", 1); 372 ptransfer(1); 373 } 374 errno = oerrno; 375 } 376 #endif /* !STANDALONE_PROGRESS */ 377 378 379 /* 380 * Set the SIGALRM interval timer for wait seconds, 0 to disable. 381 */ 382 void 383 alarmtimer(int wait) 384 { 385 struct itimerval itv; 386 387 itv.it_value.tv_sec = wait; 388 itv.it_value.tv_usec = 0; 389 itv.it_interval = itv.it_value; 390 setitimer(ITIMER_REAL, &itv, NULL); 391 } 392 393 394 /* 395 * Install a POSIX signal handler, allowing the invoker to set whether 396 * the signal should be restartable or not 397 */ 398 sigfunc 399 xsignal_restart(int sig, sigfunc func, int restartable) 400 { 401 struct sigaction act, oact; 402 act.sa_handler = func; 403 404 sigemptyset(&act.sa_mask); 405 #if defined(SA_RESTART) /* 4.4BSD, Posix(?), SVR4 */ 406 act.sa_flags = restartable ? SA_RESTART : 0; 407 #elif defined(SA_INTERRUPT) /* SunOS 4.x */ 408 act.sa_flags = restartable ? 0 : SA_INTERRUPT; 409 #else 410 #error "system must have SA_RESTART or SA_INTERRUPT" 411 #endif 412 if (sigaction(sig, &act, &oact) < 0) 413 return (SIG_ERR); 414 return (oact.sa_handler); 415 } 416 417 /* 418 * Install a signal handler with the `restartable' flag set dependent upon 419 * which signal is being set. (This is a wrapper to xsignal_restart()) 420 */ 421 sigfunc 422 xsignal(int sig, sigfunc func) 423 { 424 int restartable; 425 426 /* 427 * Some signals print output or change the state of the process. 428 * There should be restartable, so that reads and writes are 429 * not affected. Some signals should cause program flow to change; 430 * these signals should not be restartable, so that the system call 431 * will return with EINTR, and the program will go do something 432 * different. If the signal handler calls longjmp() or siglongjmp(), 433 * it doesn't matter if it's restartable. 434 */ 435 436 switch(sig) { 437 #ifdef SIGINFO 438 case SIGINFO: 439 #endif 440 case SIGQUIT: 441 case SIGUSR1: 442 case SIGUSR2: 443 case SIGWINCH: 444 restartable = 1; 445 break; 446 447 case SIGALRM: 448 case SIGINT: 449 case SIGPIPE: 450 restartable = 0; 451 break; 452 453 default: 454 /* 455 * This is unpleasant, but I don't know what would be better. 456 * Right now, this "can't happen" 457 */ 458 errx(1, "xsignal_restart called with signal %d", sig); 459 } 460 461 return(xsignal_restart(sig, func, restartable)); 462 } 463
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