/* $NetBSD: progressmeter.c,v 1.13.8.2 2023/11/02 22:15:21 sborrill Exp $ */ /* $OpenBSD: progressmeter.c,v 1.53 2023/04/12 14:22:04 jsg Exp $ */ /* * Copyright (c) 2003 Nils Nordman. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #include "includes.h" __RCSID("$NetBSD: progressmeter.c,v 1.13.8.2 2023/11/02 22:15:21 sborrill Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include "progressmeter.h" #include "atomicio.h" #include "misc.h" #include "utf8.h" #define DEFAULT_WINSIZE 80 #define MAX_WINSIZE 512 #define PADDING 1 /* padding between the progress indicators */ #define UPDATE_INTERVAL 1 /* update the progress meter every second */ #define STALL_TIME 5 /* we're stalled after this many seconds */ /* determines whether we can output to the terminal */ static int can_output(void); /* window resizing */ static void sig_winch(int); static void setscreensize(void); /* signal handler for updating the progress meter */ static void sig_alarm(int); static double start; /* start progress */ static double last_update; /* last progress update */ static const char *file; /* name of the file being transferred */ static off_t start_pos; /* initial position of transfer */ static off_t end_pos; /* ending position of transfer */ static off_t cur_pos; /* transfer position as of last refresh */ static off_t last_pos; static off_t max_delta_pos = 0; static volatile off_t *counter; /* progress counter */ static long stalled; /* how long we have been stalled */ static int bytes_per_second; /* current speed in bytes per second */ static int win_size; /* terminal window size */ static volatile sig_atomic_t win_resized; /* for window resizing */ static volatile sig_atomic_t alarm_fired; /* units for format_size */ static const char unit[] = " KMGT"; static int can_output(void) { return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); } /* size needed to format integer type v, using (nbits(v) * log2(10) / 10) */ #define STRING_SIZE(v) (((sizeof(v) * 8 * 4) / 10) + 1) static const char * format_rate(off_t bytes) { int i; static char buf[STRING_SIZE(bytes) * 2 + 16]; bytes *= 100; for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++) bytes = (bytes + 512) / 1024; if (i == 0) { i++; bytes = (bytes + 512) / 1024; } snprintf(buf, sizeof(buf), "%3lld.%1lld%c%s", (long long) (bytes + 5) / 100, (long long) (bytes + 5) / 10 % 10, unit[i], i ? "B" : " "); return buf; } static const char * format_size(off_t bytes) { int i; static char buf[STRING_SIZE(bytes) + 16]; for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) bytes = (bytes + 512) / 1024; snprintf(buf, sizeof(buf), "%4lld%c%s", (long long) bytes, unit[i], i ? "B" : " "); return buf; } void refresh_progress_meter(int force_update) { char *buf = NULL, *obuf = NULL; off_t transferred; double elapsed, now; int percent; off_t bytes_left; int cur_speed; int hours, minutes, seconds; int file_len, cols; off_t delta_pos; if ((!force_update && !alarm_fired && !win_resized) || !can_output()) return; alarm_fired = 0; if (win_resized) { setscreensize(); win_resized = 0; } transferred = *counter - (cur_pos ? cur_pos : start_pos); cur_pos = *counter; now = monotime_double(); bytes_left = end_pos - cur_pos; delta_pos = cur_pos - last_pos; if (delta_pos > max_delta_pos) max_delta_pos = delta_pos; if (bytes_left > 0) elapsed = now - last_update; else { elapsed = now - start; /* Calculate true total speed when done */ transferred = end_pos - start_pos; bytes_per_second = 0; } /* calculate speed */ if (elapsed != 0) cur_speed = (transferred / elapsed); else cur_speed = transferred; #define AGE_FACTOR 0.9 if (bytes_per_second != 0) { bytes_per_second = (bytes_per_second * AGE_FACTOR) + (cur_speed * (1.0 - AGE_FACTOR)); } else bytes_per_second = cur_speed; last_update = now; /* Don't bother if we can't even display the completion percentage */ if (win_size < 4) return; /* filename */ file_len = cols = win_size - 36; if (file_len > 0) { asmprintf(&buf, INT_MAX, &cols, "%-*s", file_len, file); /* If we used fewer columns than expected then pad */ if (cols < file_len) xextendf(&buf, NULL, "%*s", file_len - cols, ""); } /* percent of transfer done */ if (end_pos == 0 || cur_pos == end_pos) percent = 100; else percent = ((float)cur_pos / end_pos) * 100; /* percent / amount transferred / bandwidth usage */ xextendf(&buf, NULL, " %3d%% %s %s/s ", percent, format_size(cur_pos), format_rate((off_t)bytes_per_second)); /* ETA */ if (!transferred) stalled += elapsed; else stalled = 0; if (stalled >= STALL_TIME) xextendf(&buf, NULL, "- stalled -"); else if (bytes_per_second == 0 && bytes_left) xextendf(&buf, NULL, " --:-- ETA"); else { if (bytes_left > 0) seconds = bytes_left / bytes_per_second; else seconds = elapsed; hours = seconds / 3600; seconds -= hours * 3600; minutes = seconds / 60; seconds -= minutes * 60; if (hours != 0) { xextendf(&buf, NULL, "%d:%02d:%02d", hours, minutes, seconds); } else xextendf(&buf, NULL, " %02d:%02d", minutes, seconds); if (bytes_left > 0) xextendf(&buf, NULL, " ETA"); else xextendf(&buf, NULL, " "); } /* Finally, truncate string at window width */ cols = win_size - 1; asmprintf(&obuf, INT_MAX, &cols, " %s", buf); if (obuf != NULL) { *obuf = '\r'; /* must insert as asmprintf() would escape it */ atomicio(vwrite, STDOUT_FILENO, obuf, strlen(obuf)); } free(buf); free(obuf); } static void sig_alarm(int ignore) { alarm_fired = 1; alarm(UPDATE_INTERVAL); } void start_progress_meter(const char *f, off_t filesize, off_t *ctr) { start = last_update = monotime_double(); file = f; start_pos = *ctr; end_pos = filesize; cur_pos = 0; counter = ctr; stalled = 0; bytes_per_second = 0; setscreensize(); refresh_progress_meter(1); ssh_signal(SIGALRM, sig_alarm); ssh_signal(SIGWINCH, sig_winch); alarm(UPDATE_INTERVAL); } void stop_progress_meter(void) { alarm(0); if (!can_output()) return; /* Ensure we complete the progress */ if (cur_pos != end_pos) refresh_progress_meter(1); atomicio(vwrite, STDOUT_FILENO, __UNCONST("\n"), 1); } static void sig_winch(int sig) { win_resized = 1; } static void setscreensize(void) { struct winsize winsize; if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 && winsize.ws_col != 0) { if (winsize.ws_col > MAX_WINSIZE) win_size = MAX_WINSIZE; else win_size = winsize.ws_col; } else win_size = DEFAULT_WINSIZE; win_size += 1; /* trailing \0 */ }