progress.c

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/*  -*- c-file-style: "linux" -*-
 *
 * Copyright (C) 1996-2000 by Andrew Tridgell
 * Copyright (C) Paul Mackerras 1996
 * Copyright (C) 2001, 2002 by Martin Pool <mbp@samba.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include "rsync.h"

extern struct stats stats;
extern int am_server;

#define PROGRESS_HISTORY_SECS 5

#ifdef GETPGRP_VOID
#define GETPGRP_ARG
#else
#define GETPGRP_ARG 0
#endif

struct progress_history {
        struct timeval time;
        OFF_T ofs;
};

static struct progress_history ph_start;
static struct progress_history ph_list[PROGRESS_HISTORY_SECS];
static int newest_hpos, oldest_hpos;

static unsigned long msdiff(struct timeval *t1, struct timeval *t2)
{
        return (t2->tv_sec - t1->tv_sec) * 1000L
             + (t2->tv_usec - t1->tv_usec) / 1000;
}


/**
 * @param ofs Current position in file
 * @param size Total size of file
 * @param is_last True if this is the last time progress will be
 * printed for this file, so we should output a newline.  (Not
 * necessarily the same as all bytes being received.)
 **/
static void rprint_progress(OFF_T ofs, OFF_T size, struct timeval *now,
                            int is_last)
{
        char eol[256];
        const char *units;
        int pct = ofs == size ? 100 : (int) (100.0 * ofs / size);
        unsigned long diff;
        double rate, remain;
        int remain_h, remain_m, remain_s;

        if (is_last) {
                /* Compute stats based on the starting info. */
                if (!ph_start.time.tv_sec
                    || !(diff = msdiff(&ph_start.time, now)))
                        diff = 1;
                rate = (double) (ofs - ph_start.ofs) * 1000.0 / diff / 1024.0;
                /* Switch to total time taken for our last update. */
                remain = (double) diff / 1000.0;
        } else {
                /* Compute stats based on recent progress. */
                if (!(diff = msdiff(&ph_list[oldest_hpos].time, now)))
                        diff = 1;
                rate = (double) (ofs - ph_list[oldest_hpos].ofs) * 1000.0
                     / diff / 1024.0;
                remain = rate ? (double) (size - ofs) / rate / 1000.0 : 0.0;
        }

        if (rate > 1024*1024) {
                rate /= 1024.0 * 1024.0;
                units = "GB/s";
        } else if (rate > 1024) {
                rate /= 1024.0;
                units = "MB/s";
        } else {
                units = "kB/s";
        }

        remain_s = (int) remain % 60;
        remain_m = (int) (remain / 60.0) % 60;
        remain_h = (int) (remain / 3600.0);

        if (is_last) {
                snprintf(eol, sizeof eol, " (xfer#%d, to-check=%d/%d)\n",
                        stats.num_transferred_files,
                        stats.num_files - stats.current_file_index - 1,
                        stats.num_files);
        } else
                strcpy(eol, "\r");
        rprintf(FINFO, "%12s %3d%% %7.2f%s %4d:%02d:%02d%s",
                human_num(ofs), pct, rate, units,
                remain_h, remain_m, remain_s, eol);
}

void end_progress(OFF_T size)
{
        if (!am_server) {
                struct timeval now;
                gettimeofday(&now, NULL);
                rprint_progress(size, size, &now, True);
        }
        memset(&ph_start, 0, sizeof ph_start);
}

void show_progress(OFF_T ofs, OFF_T size)
{
        struct timeval now;
#if defined HAVE_GETPGRP && defined HAVE_TCGETPGRP
        static pid_t pgrp = -1;
        pid_t tc_pgrp;
#endif

        if (am_server)
                return;

#if defined HAVE_GETPGRP && defined HAVE_TCGETPGRP
        if (pgrp == -1)
                pgrp = getpgrp(GETPGRP_ARG);
#endif

        gettimeofday(&now, NULL);

        if (!ph_start.time.tv_sec) {
                int i;

                /* Try to guess the real starting time when the sender started
                 * to send us data by using the time we last received some data
                 * in the last file (if it was recent enough). */
                if (msdiff(&ph_list[newest_hpos].time, &now) <= 1500) {
                        ph_start.time = ph_list[newest_hpos].time;
                        ph_start.ofs = 0;
                } else {
                        ph_start.time.tv_sec = now.tv_sec;
                        ph_start.time.tv_usec = now.tv_usec;
                        ph_start.ofs = ofs;
                }

                for (i = 0; i < PROGRESS_HISTORY_SECS; i++)
                        ph_list[i] = ph_start;
        }
        else {
                if (msdiff(&ph_list[newest_hpos].time, &now) < 1000)
                        return;

                newest_hpos = oldest_hpos;
                oldest_hpos = (oldest_hpos + 1) % PROGRESS_HISTORY_SECS;
                ph_list[newest_hpos].time.tv_sec = now.tv_sec;
                ph_list[newest_hpos].time.tv_usec = now.tv_usec;
                ph_list[newest_hpos].ofs = ofs;
        }

#if defined HAVE_GETPGRP && defined HAVE_TCGETPGRP
        tc_pgrp = tcgetpgrp(STDOUT_FILENO);
        if (tc_pgrp != pgrp && tc_pgrp != -1)
                return;
#endif

        rprint_progress(ofs, size, &now, False);
}

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