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/*
* Create a squashfs filesystem. This is a highly compressed read only
* filesystem.
*
* Copyright (c) 2013
* Phillip Lougher <phillip@squashfs.org.uk>
*
* 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,
* 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
* unsquashfs_info.c
*/
#include <pthread.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <signal.h>
#include <sys/time.h>
#include <stdio.h>
#include <math.h>
#include <stdarg.h>
#include <errno.h>
#include <stdlib.h>
#include <dirent.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>
#include "squashfs_fs.h"
#include "unsquashfs.h"
#include "error.h"
static int silent = 0;
char *pathname = NULL;
pthread_t info_thread;
void disable_info()
{
if(pathname)
free(pathname);
pathname = NULL;
}
void update_info(char *name)
{
if(pathname)
free(pathname);
pathname = name;
}
void dump_state()
{
disable_progress_bar();
printf("Queue and cache status dump\n");
printf("===========================\n");
printf("file buffer read queue (main thread -> reader thread)\n");
dump_queue(to_reader);
printf("file buffer decompress queue (reader thread -> inflate"
" thread(s))\n");
dump_queue(to_inflate);
printf("file buffer write queue (main thread -> writer thread)\n");
dump_queue(to_writer);
printf("\nbuffer cache (uncompressed blocks and compressed blocks "
"'in flight')\n");
dump_cache(data_cache);
printf("fragment buffer cache (uncompressed frags and compressed"
" frags 'in flight')\n");
dump_cache(fragment_cache);
enable_progress_bar();
}
void *info_thrd(void *arg)
{
sigset_t sigmask;
struct timespec timespec = { .tv_sec = 1, .tv_nsec = 0 };
int sig, waiting = 0;
sigemptyset(&sigmask);
sigaddset(&sigmask, SIGQUIT);
sigaddset(&sigmask, SIGHUP);
while(1) {
if(waiting)
sig = sigtimedwait(&sigmask, NULL, ×pec);
else
sig = sigwaitinfo(&sigmask, NULL);
if(sig == -1) {
switch(errno) {
case EAGAIN:
/* interval timed out */
waiting = 0;
/* FALLTHROUGH */
case EINTR:
/* if waiting, the wait will be longer, but
that's OK */
continue;
default:
BAD_ERROR("sigtimedwait/sigwaitinfo failed "
"because %s\n", strerror(errno));
}
}
if(sig == SIGQUIT && !waiting) {
if(pathname)
INFO("%s\n", pathname);
/* set one second interval period, if ^\ received
within then, dump queue and cache status */
waiting = 1;
} else
dump_state();
}
}
void init_info()
{
pthread_create(&info_thread, NULL, info_thrd, NULL);
}
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