[openssh.git] / progressmeter.c

/* $OpenBSD: progressmeter.c,v 1.35 2006/08/01 23:22:47 stevesk 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"

#include <sys/types.h>
#include <sys/ioctl.h>

#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include <unistd.h>

#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);

/* 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;
}

/*ARGSUSED*/
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);
}

/*ARGSUSED*/
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 */
}
Commit	Line	Data
cf851879	1	/* $OpenBSD: progressmeter.c,v 1.35 2006/08/01 23:22:47 stevesk Exp $ */
c9c38b73	2	/*
178b1a1d	3	* Copyright (c) 2003 Nils Nordman. All rights reserved.
c9c38b73	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	*
	14	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
	15	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
	16	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
	17	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
	18	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
	19	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
	20	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
	21	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	22	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
	23	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	24	*/
	25
c9c38b73	26	#include "includes.h"
bd7c69ea	27
5188ba17	28	#include <sys/types.h>
bd7c69ea	29	#include <sys/ioctl.h>
c9c38b73	30
028094f4	31	#include <errno.h>
ada68823	32	#include <signal.h>
cf851879	33	#include <stdio.h>
00146caa	34	#include <string.h>
b0f6943a	35	#include <time.h>
5188ba17	36	#include <unistd.h>
ada68823	37
b7fd001f	38	#include "progressmeter.h"
178b1a1d	39	#include "atomicio.h"
8d9bb5dd	40	#include "misc.h"
c9c38b73	41
178b1a1d	42	#define DEFAULT_WINSIZE 80
	43	#define MAX_WINSIZE 512
	44	#define PADDING 1 /* padding between the progress indicators */
	45	#define UPDATE_INTERVAL 1 /* update the progress meter every second */
	46	#define STALL_TIME 5 /* we're stalled after this many seconds */
c9c38b73	47
178b1a1d	48	/* determines whether we can output to the terminal */
178b1a1d	49	static int can_output(void);
c9c38b73	50
178b1a1d	51	/* formats and inserts the specified size into the given buffer */
	52	static void format_size(char *, int, off_t);
	53	static void format_rate(char *, int, off_t);
c9c38b73	54
826563dc	55	/* window resizing */
	56	static void sig_winch(int);
	57	static void setscreensize(void);
	58
178b1a1d	59	/* updates the progressmeter to reflect the current state of the transfer */
178b1a1d	60	void refresh_progress_meter(void);
c9c38b73	61
178b1a1d	62	/* signal handler for updating the progress meter */
178b1a1d	63	static void update_progress_meter(int);
c9c38b73	64
f2107e97	65	static time_t start; /* start progress */
	66	static time_t last_update; /* last progress update */
	67	static char file; / name of the file being transferred */
	68	static off_t end_pos; /* ending position of transfer */
	69	static off_t cur_pos; /* transfer position as of last refresh */
178b1a1d	70	static volatile off_t counter; / progress counter */
f2107e97	71	static long stalled; /* how long we have been stalled */
	72	static int bytes_per_second; /* current speed in bytes per second */
	73	static int win_size; /* terminal window size */
826563dc	74	static volatile sig_atomic_t win_resized; /* for window resizing */
c9c38b73	75
178b1a1d	76	/* units for format_size */
178b1a1d	77	static const char unit[] = " KMGT";
c9c38b73	78
178b1a1d	79	static int
	80	can_output(void)
	81	{
	82	return (getpgrp() == tcgetpgrp(STDOUT_FILENO));
	83	}
c9c38b73	84
178b1a1d	85	static void
	86	format_rate(char *buf, int size, off_t bytes)
	87	{
	88	int i;
	89
	90	bytes *= 100;
	91	for (i = 0; bytes >= 100*1000 && unit[i] != 'T'; i++)
	92	bytes = (bytes + 512) / 1024;
	93	if (i == 0) {
	94	i++;
	95	bytes = (bytes + 512) / 1024;
	96	}
	97	snprintf(buf, size, "%3lld.%1lld%c%s",
419094c6	98	(long long) (bytes + 5) / 100,
419094c6	99	(long long) (bytes + 5) / 10 % 10,
178b1a1d	100	unit[i],
	101	i ? "B" : " ");
	102	}
c9c38b73	103
178b1a1d	104	static void
	105	format_size(char *buf, int size, off_t bytes)
	106	{
	107	int i;
	108
	109	for (i = 0; bytes >= 10000 && unit[i] != 'T'; i++)
	110	bytes = (bytes + 512) / 1024;
	111	snprintf(buf, size, "%4lld%c%s",
419094c6	112	(long long) bytes,
178b1a1d	113	unit[i],
	114	i ? "B" : " ");
	115	}
c9c38b73	116
c9c38b73	117	void
178b1a1d	118	refresh_progress_meter(void)
c9c38b73	119	{
178b1a1d	120	char buf[MAX_WINSIZE + 1];
	121	time_t now;
	122	off_t transferred;
	123	double elapsed;
	124	int percent;
7b0a59c9	125	off_t bytes_left;
178b1a1d	126	int cur_speed;
	127	int hours, minutes, seconds;
	128	int i, len;
	129	int file_len;
	130
	131	transferred = *counter - cur_pos;
	132	cur_pos = *counter;
	133	now = time(NULL);
	134	bytes_left = end_pos - cur_pos;
	135
	136	if (bytes_left > 0)
	137	elapsed = now - last_update;
adfde93f	138	else {
178b1a1d	139	elapsed = now - start;
adfde93f	140	/* Calculate true total speed when done */
	141	transferred = end_pos;
	142	bytes_per_second = 0;
	143	}
c9c38b73	144
178b1a1d	145	/* calculate speed */
	146	if (elapsed != 0)
	147	cur_speed = (transferred / elapsed);
	148	else
adfde93f	149	cur_speed = transferred;
c9c38b73	150
178b1a1d	151	#define AGE_FACTOR 0.9
	152	if (bytes_per_second != 0) {
	153	bytes_per_second = (bytes_per_second * AGE_FACTOR) +
	154	(cur_speed * (1.0 - AGE_FACTOR));
	155	} else
	156	bytes_per_second = cur_speed;
	157
	158	/* filename */
	159	buf[0] = '\0';
	160	file_len = win_size - 35;
	161	if (file_len > 0) {
8e382949	162	len = snprintf(buf, file_len + 1, "\r%s", file);
3845a9ac	163	if (len < 0)
3845a9ac	164	len = 0;
4b826d75	165	if (len >= file_len + 1)
4b826d75	166	len = file_len;
178b1a1d	167	for (i = len; i < file_len; i++ )
	168	buf[i] = ' ';
	169	buf[file_len] = '\0';
	170	}
c9c38b73	171
178b1a1d	172	/* percent of transfer done */
	173	if (end_pos != 0)
	174	percent = ((float)cur_pos / end_pos) * 100;
	175	else
	176	percent = 100;
	177	snprintf(buf + strlen(buf), win_size - strlen(buf),
	178	" %3d%% ", percent);
	179
	180	/* amount transferred */
	181	format_size(buf + strlen(buf), win_size - strlen(buf),
	182	cur_pos);
	183	strlcat(buf, " ", win_size);
	184
	185	/* bandwidth usage */
	186	format_rate(buf + strlen(buf), win_size - strlen(buf),
f6be21a0	187	(off_t)bytes_per_second);
178b1a1d	188	strlcat(buf, "/s ", win_size);
	189
	190	/* ETA */
	191	if (!transferred)
	192	stalled += elapsed;
	193	else
	194	stalled = 0;
	195
	196	if (stalled >= STALL_TIME)
	197	strlcat(buf, "- stalled -", win_size);
	198	else if (bytes_per_second == 0 && bytes_left)
	199	strlcat(buf, " --:-- ETA", win_size);
	200	else {
	201	if (bytes_left > 0)
	202	seconds = bytes_left / bytes_per_second;
	203	else
	204	seconds = elapsed;
	205
	206	hours = seconds / 3600;
	207	seconds -= hours * 3600;
	208	minutes = seconds / 60;
	209	seconds -= minutes * 60;
	210
	211	if (hours != 0)
	212	snprintf(buf + strlen(buf), win_size - strlen(buf),
	213	"%d:%02d:%02d", hours, minutes, seconds);
	214	else
	215	snprintf(buf + strlen(buf), win_size - strlen(buf),
	216	" %02d:%02d", minutes, seconds);
	217
	218	if (bytes_left > 0)
	219	strlcat(buf, " ETA", win_size);
	220	else
	221	strlcat(buf, " ", win_size);
	222	}
	223
0469be42	224	atomicio(vwrite, STDOUT_FILENO, buf, win_size - 1);
178b1a1d	225	last_update = now;
c9c38b73	226	}
c9c38b73	227
c88c3fb9	228	/ARGSUSED/
c9c38b73	229	static void
	230	update_progress_meter(int ignore)
	231	{
178b1a1d	232	int save_errno;
	233
	234	save_errno = errno;
	235
826563dc	236	if (win_resized) {
	237	setscreensize();
	238	win_resized = 0;
	239	}
178b1a1d	240	if (can_output())
178b1a1d	241	refresh_progress_meter();
c9c38b73	242
f00d1f78	243	signal(SIGALRM, update_progress_meter);
178b1a1d	244	alarm(UPDATE_INTERVAL);
c9c38b73	245	errno = save_errno;
	246	}
	247
178b1a1d	248	void
ca75d7de	249	start_progress_meter(char f, off_t filesize, off_t ctr)
c9c38b73	250	{
178b1a1d	251	start = last_update = time(NULL);
	252	file = f;
	253	end_pos = filesize;
	254	cur_pos = 0;
ca75d7de	255	counter = ctr;
178b1a1d	256	stalled = 0;
	257	bytes_per_second = 0;
	258
826563dc	259	setscreensize();
178b1a1d	260	if (can_output())
178b1a1d	261	refresh_progress_meter();
c9c38b73	262
f00d1f78	263	signal(SIGALRM, update_progress_meter);
826563dc	264	signal(SIGWINCH, sig_winch);
178b1a1d	265	alarm(UPDATE_INTERVAL);
c9c38b73	266	}
c9c38b73	267
178b1a1d	268	void
178b1a1d	269	stop_progress_meter(void)
c9c38b73	270	{
178b1a1d	271	alarm(0);
c9c38b73	272
178b1a1d	273	if (!can_output())
	274	return;
	275
	276	/* Ensure we complete the progress */
	277	if (cur_pos != end_pos)
	278	refresh_progress_meter();
	279
	280	atomicio(vwrite, STDOUT_FILENO, "\n", 1);
c9c38b73	281	}
826563dc	282
3efa8ea9	283	/ARGSUSED/
826563dc	284	static void
	285	sig_winch(int sig)
	286	{
	287	win_resized = 1;
	288	}
	289
	290	static void
	291	setscreensize(void)
	292	{
	293	struct winsize winsize;
	294
	295	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &winsize) != -1 &&
	296	winsize.ws_col != 0) {
	297	if (winsize.ws_col > MAX_WINSIZE)
	298	win_size = MAX_WINSIZE;
	299	else
	300	win_size = winsize.ws_col;
	301	} else
	302	win_size = DEFAULT_WINSIZE;
	303	win_size += 1; /* trailing \0 */
	304	}