[openssh.git] / progressmeter.c

/*
 * 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 1.13 2003/07/31 22:34:03 markus Exp $");

#include "progressmeter.h"
#include "atomicio.h"
#include "misc.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);

/* 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 */

/* 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",
	    (int64_t) bytes / 100,
	    (int64_t) (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",
	    (int64_t) 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;
	int 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 speed */
	if (elapsed != 0)
		cur_speed = (transferred / elapsed);
	else
		cur_speed = 0;

#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, "\r%s", file);
		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),
	    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);
	last_update = now;
}

static void
update_progress_meter(int ignore)
{
	int save_errno;

	save_errno = errno;

	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 *stat)
{
	struct winsize winsize;

	start = last_update = time(NULL);
	file = f;
	end_pos = filesize;
	cur_pos = 0;
	counter = stat;
	stalled = 0;
	bytes_per_second = 0;

	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 */

	if (can_output())
		refresh_progress_meter();

	signal(SIGALRM, update_progress_meter);
	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);
}
Commit	Line	Data
c9c38b73	1	/*
178b1a1d	2	* Copyright (c) 2003 Nils Nordman. All rights reserved.
c9c38b73	3	*
	4	* Redistribution and use in source and binary forms, with or without
	5	* modification, are permitted provided that the following conditions
	6	* are met:
	7	* 1. Redistributions of source code must retain the above copyright
	8	* notice, this list of conditions and the following disclaimer.
	9	* 2. Redistributions in binary form must reproduce the above copyright
	10	* notice, this list of conditions and the following disclaimer in the
	11	* documentation and/or other materials provided with the distribution.
	12	*
	13	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	14	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	15	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	16	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	17	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	18	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	19	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	20	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	21	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	22	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	23	*/
	24
c9c38b73	25	#include "includes.h"
178b1a1d	26	RCSID("$OpenBSD: progressmeter.c,v 1.13 2003/07/31 22:34:03 markus Exp $");
c9c38b73	27
b7fd001f	28	#include "progressmeter.h"
178b1a1d	29	#include "atomicio.h"
8d9bb5dd	30	#include "misc.h"
c9c38b73	31
178b1a1d	32	#define DEFAULT_WINSIZE 80
	33	#define MAX_WINSIZE 512
	34	#define PADDING 1 /* padding between the progress indicators */
	35	#define UPDATE_INTERVAL 1 /* update the progress meter every second */
	36	#define STALL_TIME 5 /* we're stalled after this many seconds */
c9c38b73	37
178b1a1d	38	/* determines whether we can output to the terminal */
178b1a1d	39	static int can_output(void);
c9c38b73	40
178b1a1d	41	/* formats and inserts the specified size into the given buffer */
	42	static void format_size(char *, int, off_t);
	43	static void format_rate(char *, int, off_t);
c9c38b73	44
178b1a1d	45	/* updates the progressmeter to reflect the current state of the transfer */
178b1a1d	46	void refresh_progress_meter(void);
c9c38b73	47
178b1a1d	48	/* signal handler for updating the progress meter */
178b1a1d	49	static void update_progress_meter(int);
c9c38b73	50
178b1a1d	51	static time_t start; /* start progress */
	52	static time_t last_update; /* last progress update */
	53	static char file; / name of the file being transferred */
	54	static off_t end_pos; /* ending position of transfer */
	55	static off_t cur_pos; /* transfer position as of last refresh */
	56	static volatile off_t counter; / progress counter */
	57	static long stalled; /* how long we have been stalled */
	58	static int bytes_per_second; /* current speed in bytes per second */
	59	static int win_size; /* terminal window size */
c9c38b73	60
178b1a1d	61	/* units for format_size */
178b1a1d	62	static const char unit[] = " KMGT";
c9c38b73	63
178b1a1d	64	static int
	65	can_output(void)
	66	{
	67	return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
	68	}
c9c38b73	69
178b1a1d	70	static void
	71	format_rate(char *buf, int size, off_t bytes)
	72	{
	73	int i;
	74
	75	bytes *= 100;
	76	for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
	77	bytes = (bytes + 512) / 1024;
	78	if (i == 0) {
	79	i++;
	80	bytes = (bytes + 512) / 1024;
	81	}
	82	snprintf(buf, size, "%3lld.%1lld%c%s",
	83	(int64_t) bytes / 100,
	84	(int64_t) (bytes + 5) / 10 % 10,
	85	unit[i],
	86	i ? "B" : " ");
	87	}
c9c38b73	88
178b1a1d	89	static void
	90	format_size(char *buf, int size, off_t bytes)
	91	{
	92	int i;
	93
	94	for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
	95	bytes = (bytes + 512) / 1024;
	96	snprintf(buf, size, "%4lld%c%s",
	97	(int64_t) bytes,
	98	unit[i],
	99	i ? "B" : " ");
	100	}
c9c38b73	101
c9c38b73	102	void
178b1a1d	103	refresh_progress_meter(void)
c9c38b73	104	{
178b1a1d	105	char buf[MAX_WINSIZE + 1];
	106	time_t now;
	107	off_t transferred;
	108	double elapsed;
	109	int percent;
	110	int bytes_left;
	111	int cur_speed;
	112	int hours, minutes, seconds;
	113	int i, len;
	114	int file_len;
	115
	116	transferred = *counter - cur_pos;
	117	cur_pos = *counter;
	118	now = time(NULL);
	119	bytes_left = end_pos - cur_pos;
	120
	121	if (bytes_left > 0)
	122	elapsed = now - last_update;
	123	else
	124	elapsed = now - start;
c9c38b73	125
178b1a1d	126	/* calculate speed */
	127	if (elapsed != 0)
	128	cur_speed = (transferred / elapsed);
	129	else
	130	cur_speed = 0;
c9c38b73	131
178b1a1d	132	#define AGE_FACTOR 0.9
	133	if (bytes_per_second != 0) {
	134	bytes_per_second = (bytes_per_second * AGE_FACTOR) +
	135	(cur_speed * (1.0 - AGE_FACTOR));
	136	} else
	137	bytes_per_second = cur_speed;
	138
	139	/* filename */
	140	buf[0] = '\0';
	141	file_len = win_size - 35;
	142	if (file_len > 0) {
	143	len = snprintf(buf, file_len, "\r%s", file);
	144	for (i = len; i < file_len; i++ )
	145	buf[i] = ' ';
	146	buf[file_len] = '\0';
	147	}
c9c38b73	148
178b1a1d	149	/* percent of transfer done */
	150	if (end_pos != 0)
	151	percent = ((float)cur_pos / end_pos) * 100;
	152	else
	153	percent = 100;
	154	snprintf(buf + strlen(buf), win_size - strlen(buf),
	155	" %3d%% ", percent);
	156
	157	/* amount transferred */
	158	format_size(buf + strlen(buf), win_size - strlen(buf),
	159	cur_pos);
	160	strlcat(buf, " ", win_size);
	161
	162	/* bandwidth usage */
	163	format_rate(buf + strlen(buf), win_size - strlen(buf),
	164	bytes_per_second);
	165	strlcat(buf, "/s ", win_size);
	166
	167	/* ETA */
	168	if (!transferred)
	169	stalled += elapsed;
	170	else
	171	stalled = 0;
	172
	173	if (stalled >= STALL_TIME)
	174	strlcat(buf, "- stalled -", win_size);
	175	else if (bytes_per_second == 0 && bytes_left)
	176	strlcat(buf, " --:-- ETA", win_size);
	177	else {
	178	if (bytes_left > 0)
	179	seconds = bytes_left / bytes_per_second;
	180	else
	181	seconds = elapsed;
	182
	183	hours = seconds / 3600;
	184	seconds -= hours * 3600;
	185	minutes = seconds / 60;
	186	seconds -= minutes * 60;
	187
	188	if (hours != 0)
	189	snprintf(buf + strlen(buf), win_size - strlen(buf),
	190	"%d:%02d:%02d", hours, minutes, seconds);
	191	else
	192	snprintf(buf + strlen(buf), win_size - strlen(buf),
	193	" %02d:%02d", minutes, seconds);
	194
	195	if (bytes_left > 0)
	196	strlcat(buf, " ETA", win_size);
	197	else
	198	strlcat(buf, " ", win_size);
	199	}
	200
	201	atomicio(vwrite, STDOUT_FILENO, buf, win_size);
	202	last_update = now;
c9c38b73	203	}
	204
	205	static void
	206	update_progress_meter(int ignore)
	207	{
178b1a1d	208	int save_errno;
	209
	210	save_errno = errno;
	211
	212	if (can_output())
	213	refresh_progress_meter();
c9c38b73	214
f00d1f78	215	signal(SIGALRM, update_progress_meter);
178b1a1d	216	alarm(UPDATE_INTERVAL);
c9c38b73	217	errno = save_errno;
	218	}
	219
178b1a1d	220	void
178b1a1d	221	start_progress_meter(char f, off_t filesize, off_t stat)
c9c38b73	222	{
178b1a1d	223	struct winsize winsize;
c9c38b73	224
178b1a1d	225	start = last_update = time(NULL);
	226	file = f;
	227	end_pos = filesize;
	228	cur_pos = 0;
	229	counter = stat;
	230	stalled = 0;
	231	bytes_per_second = 0;
	232
	233	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
	234	winsize.ws_col != 0) {
	235	if (winsize.ws_col > MAX_WINSIZE)
	236	win_size = MAX_WINSIZE;
	237	else
	238	win_size = winsize.ws_col;
c9c38b73	239	} else
178b1a1d	240	win_size = DEFAULT_WINSIZE;
178b1a1d	241	win_size += 1; /* trailing \0 */
c9c38b73	242
178b1a1d	243	if (can_output())
178b1a1d	244	refresh_progress_meter();
c9c38b73	245
f00d1f78	246	signal(SIGALRM, update_progress_meter);
178b1a1d	247	alarm(UPDATE_INTERVAL);
c9c38b73	248	}
c9c38b73	249
178b1a1d	250	void
178b1a1d	251	stop_progress_meter(void)
c9c38b73	252	{
178b1a1d	253	alarm(0);
c9c38b73	254
178b1a1d	255	if (!can_output())
	256	return;
	257
	258	/* Ensure we complete the progress */
	259	if (cur_pos != end_pos)
	260	refresh_progress_meter();
	261
	262	atomicio(vwrite, STDOUT_FILENO, "\n", 1);
c9c38b73	263	}