Mercurial > dropbear
view progressmeter.c @ 649:234cf769bcb3
Merge
author | Matt Johnston <matt@ucc.asn.au> |
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date | Fri, 10 Feb 2012 19:09:52 +0800 |
parents | b72f98803e46 |
children |
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#ifdef PROGRESS_METER /* * 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("$OpenBSD: progressmeter.c,v 1.24 2005/06/07 13:25:23 jaredy Exp $");*/ #include "progressmeter.h" #include "atomicio.h" #include "scpmisc.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); /* formats and inserts the specified size into the given buffer */ static void format_size(char *, int, off_t); static void format_rate(char *, int, off_t); /* window resizing */ static void sig_winch(int); static void setscreensize(void); /* updates the progressmeter to reflect the current state of the transfer */ void refresh_progress_meter(void); /* signal handler for updating the progress meter */ static void update_progress_meter(int); static time_t start; /* start progress */ static time_t last_update; /* last progress update */ static char *file; /* name of the file being transferred */ static off_t end_pos; /* ending position of transfer */ static off_t cur_pos; /* transfer position as of last refresh */ 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 */ /* units for format_size */ static const char unit[] = " KMGT"; static int can_output(void) { return (getpgrp() == tcgetpgrp(STDOUT_FILENO)); } static void format_rate(char *buf, int size, off_t bytes) { int i; 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, size, "%3lld.%1lld%c%s", (long long) (bytes + 5) / 100, (long long) (bytes + 5) / 10 % 10, unit[i], i ? "B" : " "); } static void format_size(char *buf, int size, off_t bytes) { int i; for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++) bytes = (bytes + 512) / 1024; snprintf(buf, size, "%4lld%c%s", (long long) bytes, unit[i], i ? "B" : " "); } void refresh_progress_meter(void) { char buf[MAX_WINSIZE + 1]; time_t now; off_t transferred; double elapsed; int percent; off_t bytes_left; int cur_speed; int hours, minutes, seconds; int i, len; int file_len; transferred = *counter - cur_pos; cur_pos = *counter; now = time(NULL); bytes_left = end_pos - cur_pos; if (bytes_left > 0) elapsed = now - last_update; else { elapsed = now - start; /* Calculate true total speed when done */ transferred = end_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; /* filename */ buf[0] = '\0'; file_len = win_size - 35; if (file_len > 0) { len = snprintf(buf, file_len + 1, "\r%s", file); if (len < 0) len = 0; if (len >= file_len + 1) len = file_len; for (i = len; i < file_len; i++ ) buf[i] = ' '; buf[file_len] = '\0'; } /* percent of transfer done */ if (end_pos != 0) percent = ((float)cur_pos / end_pos) * 100; else percent = 100; snprintf(buf + strlen(buf), win_size - strlen(buf), " %3d%% ", percent); /* amount transferred */ format_size(buf + strlen(buf), win_size - strlen(buf), cur_pos); strlcat(buf, " ", win_size); /* bandwidth usage */ format_rate(buf + strlen(buf), win_size - strlen(buf), (off_t)bytes_per_second); strlcat(buf, "/s ", win_size); /* ETA */ if (!transferred) stalled += elapsed; else stalled = 0; if (stalled >= STALL_TIME) strlcat(buf, "- stalled -", win_size); else if (bytes_per_second == 0 && bytes_left) strlcat(buf, " --:-- ETA", win_size); 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) snprintf(buf + strlen(buf), win_size - strlen(buf), "%d:%02d:%02d", hours, minutes, seconds); else snprintf(buf + strlen(buf), win_size - strlen(buf), " %02d:%02d", minutes, seconds); if (bytes_left > 0) strlcat(buf, " ETA", win_size); else strlcat(buf, " ", win_size); } atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1); last_update = now; } static void update_progress_meter(int ignore) { int save_errno; save_errno = errno; if (win_resized) { setscreensize(); win_resized = 0; } if (can_output()) refresh_progress_meter(); signal(SIGALRM, update_progress_meter); alarm(UPDATE_INTERVAL); errno = save_errno; } void start_progress_meter(char *f, off_t filesize, off_t *ctr) { start = last_update = time(NULL); file = f; end_pos = filesize; cur_pos = 0; counter = ctr; stalled = 0; bytes_per_second = 0; setscreensize(); if (can_output()) refresh_progress_meter(); signal(SIGALRM, update_progress_meter); 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(); atomicio(vwrite, STDOUT_FILENO, "\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 */ } #endif /* PROGRESS_METER */