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/* NBD client library in userspace.
* Copyright Red Hat
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <pthread.h>
#include <libnbd.h>
#include "array-size.h"
#include "nbdcopy.h"
/* Display the progress bar. */
static void
do_progress_bar (off_t pos, int64_t size)
{
/* Note the spinner is covered with the cursor which usually makes
* it appear inverse video.
*/
static const char *spinner[] = { "▝", "▐", "▗", "▃", "▖", "▍", "▘", "▀" };
static const char *spinner_100 = "█";
static int spinpos = 0;
double frac = (double) pos / size;
char msg[80];
size_t n, i;
if (frac < 0) frac = 0; else if (frac > 1) frac = 1;
if (frac == 1) {
snprintf (msg, sizeof msg,
"%s 100%% [****************************************]\n",
spinner_100);
progress = false; /* Don't print any more progress bar messages. */
} else {
snprintf (msg, sizeof msg,
"%s %3d%% [----------------------------------------]\r",
spinner[spinpos], (int)(100*frac));
n = strcspn (msg, "-");
for (i = 0; i < 40*frac; ++i)
msg[n+i] = '*';
spinpos = (spinpos+1) % ARRAY_SIZE (spinner);
}
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-result"
write (fileno (stderr), msg, strlen (msg));
#pragma GCC diagnostic pop
}
/* Machine-readable progress bar used with --progress-fd. */
static void
do_progress_bar_fd (off_t pos, int64_t size)
{
double frac = (double) pos / size;
char msg[80];
if (frac < 0) frac = 0; else if (frac > 1) frac = 1;
if (frac == 1)
snprintf (msg, sizeof msg, "100/100\n");
else
snprintf (msg, sizeof msg, "%d/100\n", (int)(100*frac));
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-result"
write (progress_fd, msg, strlen (msg));
#pragma GCC diagnostic pop
}
void
progress_bar (off_t pos, int64_t size)
{
static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
if (!progress)
return;
if (size == 0)
return;
/* XXX Synchronous mode, when the source is a pipe, passes size ==
* -1 here. We should deal with this by displaying some sort of
* spinner.
*/
pthread_mutex_lock (&lock);
if (progress_fd == -1)
do_progress_bar (pos, size);
else
do_progress_bar_fd (pos, size);
pthread_mutex_unlock (&lock);
}
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