[gssapi-openssh.git] / openssh / 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 1.22 2004/07/11 17:48:47 deraadt 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 + 5) / 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;
	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;
		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 (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)
{
	struct winsize winsize;

	start = last_update = time(NULL);
	file = f;
	end_pos = filesize;
	cur_pos = 0;
	counter = ctr;
	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
6a9b3198	1	/*
0fff78ff	2	* Copyright (c) 2003 Nils Nordman. All rights reserved.
6a9b3198	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
6a9b3198	25	#include "includes.h"
c9f39d2c	26	RCSID("$OpenBSD: progressmeter.c,v 1.22 2004/07/11 17:48:47 deraadt Exp $");
6a9b3198	27
6a9b3198	28	#include "progressmeter.h"
0fff78ff	29	#include "atomicio.h"
0fff78ff	30	#include "misc.h"
6a9b3198	31
0fff78ff	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 */
6a9b3198	37
0fff78ff	38	/* determines whether we can output to the terminal */
0fff78ff	39	static int can_output(void);
6a9b3198	40
0fff78ff	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);
6a9b3198	44
0fff78ff	45	/* updates the progressmeter to reflect the current state of the transfer */
0fff78ff	46	void refresh_progress_meter(void);
6a9b3198	47
0fff78ff	48	/* signal handler for updating the progress meter */
0fff78ff	49	static void update_progress_meter(int);
6a9b3198	50
c9f39d2c	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 */
0fff78ff	56	static volatile off_t counter; / progress counter */
c9f39d2c	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 */
6a9b3198	60
0fff78ff	61	/* units for format_size */
0fff78ff	62	static const char unit[] = " KMGT";
6a9b3198	63
0fff78ff	64	static int
	65	can_output(void)
	66	{
	67	return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
	68	}
6a9b3198	69
0fff78ff	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",
cdd66111	83	(int64_t) (bytes + 5) / 100,
0fff78ff	84	(int64_t) (bytes + 5) / 10 % 10,
	85	unit[i],
	86	i ? "B" : " ");
	87	}
6a9b3198	88
0fff78ff	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	}
6a9b3198	101
6a9b3198	102	void
0fff78ff	103	refresh_progress_meter(void)
6a9b3198	104	{
0fff78ff	105	char buf[MAX_WINSIZE + 1];
	106	time_t now;
	107	off_t transferred;
	108	double elapsed;
	109	int percent;
cdd66111	110	off_t bytes_left;
0fff78ff	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;
cdd66111	123	else {
0fff78ff	124	elapsed = now - start;
cdd66111	125	/* Calculate true total speed when done */
	126	transferred = end_pos;
	127	bytes_per_second = 0;
	128	}
6a9b3198	129
0fff78ff	130	/* calculate speed */
	131	if (elapsed != 0)
	132	cur_speed = (transferred / elapsed);
	133	else
cdd66111	134	cur_speed = transferred;
6a9b3198	135
0fff78ff	136	#define AGE_FACTOR 0.9
	137	if (bytes_per_second != 0) {
	138	bytes_per_second = (bytes_per_second * AGE_FACTOR) +
	139	(cur_speed * (1.0 - AGE_FACTOR));
	140	} else
	141	bytes_per_second = cur_speed;
	142
	143	/* filename */
	144	buf[0] = '\0';
	145	file_len = win_size - 35;
	146	if (file_len > 0) {
	147	len = snprintf(buf, file_len + 1, "\r%s", file);
	148	if (len < 0)
	149	len = 0;
	150	for (i = len; i < file_len; i++ )
	151	buf[i] = ' ';
	152	buf[file_len] = '\0';
	153	}
6a9b3198	154
0fff78ff	155	/* percent of transfer done */
	156	if (end_pos != 0)
	157	percent = ((float)cur_pos / end_pos) * 100;
	158	else
	159	percent = 100;
	160	snprintf(buf + strlen(buf), win_size - strlen(buf),
	161	" %3d%% ", percent);
	162
	163	/* amount transferred */
	164	format_size(buf + strlen(buf), win_size - strlen(buf),
	165	cur_pos);
	166	strlcat(buf, " ", win_size);
	167
	168	/* bandwidth usage */
	169	format_rate(buf + strlen(buf), win_size - strlen(buf),
c9f39d2c	170	(off_t)bytes_per_second);
0fff78ff	171	strlcat(buf, "/s ", win_size);
	172
	173	/* ETA */
	174	if (!transferred)
	175	stalled += elapsed;
	176	else
	177	stalled = 0;
	178
	179	if (stalled >= STALL_TIME)
	180	strlcat(buf, "- stalled -", win_size);
	181	else if (bytes_per_second == 0 && bytes_left)
	182	strlcat(buf, " --:-- ETA", win_size);
	183	else {
	184	if (bytes_left > 0)
	185	seconds = bytes_left / bytes_per_second;
	186	else
	187	seconds = elapsed;
	188
	189	hours = seconds / 3600;
	190	seconds -= hours * 3600;
	191	minutes = seconds / 60;
	192	seconds -= minutes * 60;
	193
	194	if (hours != 0)
	195	snprintf(buf + strlen(buf), win_size - strlen(buf),
	196	"%d:%02d:%02d", hours, minutes, seconds);
	197	else
	198	snprintf(buf + strlen(buf), win_size - strlen(buf),
	199	" %02d:%02d", minutes, seconds);
	200
	201	if (bytes_left > 0)
	202	strlcat(buf, " ETA", win_size);
	203	else
	204	strlcat(buf, " ", win_size);
	205	}
	206
cdd66111	207	atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1);
0fff78ff	208	last_update = now;
6a9b3198	209	}
	210
	211	static void
	212	update_progress_meter(int ignore)
	213	{
0fff78ff	214	int save_errno;
	215
	216	save_errno = errno;
	217
	218	if (can_output())
	219	refresh_progress_meter();
6a9b3198	220
6a9b3198	221	signal(SIGALRM, update_progress_meter);
0fff78ff	222	alarm(UPDATE_INTERVAL);
6a9b3198	223	errno = save_errno;
	224	}
	225
0fff78ff	226	void
c9f39d2c	227	start_progress_meter(char f, off_t filesize, off_t ctr)
6a9b3198	228	{
0fff78ff	229	struct winsize winsize;
6a9b3198	230
0fff78ff	231	start = last_update = time(NULL);
	232	file = f;
	233	end_pos = filesize;
	234	cur_pos = 0;
c9f39d2c	235	counter = ctr;
0fff78ff	236	stalled = 0;
	237	bytes_per_second = 0;
	238
	239	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
	240	winsize.ws_col != 0) {
	241	if (winsize.ws_col > MAX_WINSIZE)
	242	win_size = MAX_WINSIZE;
	243	else
	244	win_size = winsize.ws_col;
6a9b3198	245	} else
0fff78ff	246	win_size = DEFAULT_WINSIZE;
0fff78ff	247	win_size += 1; /* trailing \0 */
6a9b3198	248
0fff78ff	249	if (can_output())
0fff78ff	250	refresh_progress_meter();
6a9b3198	251
0fff78ff	252	signal(SIGALRM, update_progress_meter);
0fff78ff	253	alarm(UPDATE_INTERVAL);
6a9b3198	254	}
6a9b3198	255
0fff78ff	256	void
0fff78ff	257	stop_progress_meter(void)
6a9b3198	258	{
0fff78ff	259	alarm(0);
6a9b3198	260
0fff78ff	261	if (!can_output())
	262	return;
	263
	264	/* Ensure we complete the progress */
	265	if (cur_pos != end_pos)
	266	refresh_progress_meter();
	267
	268	atomicio(vwrite, STDOUT_FILENO, "\n", 1);
6a9b3198	269	}