63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
|
/*
|
||
|
|
* The Qubes OS Project, http://www.qubes-os.org
|
||
|
|
*
|
||
|
|
* Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
|
||
|
|
*
|
||
|
|
* 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
|
||
|
|
* of the License, 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, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
#include <sys/types.h>
|
||
|
|
#include <pwd.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
#include <fcntl.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <xs.h>
|
||
|
|
#include <syslog.h>
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
struct xs_handle *xs;
|
||
|
|
int fd, n;
|
||
|
|
char buf[4096];
|
||
|
|
|
||
|
|
openlog("meminfo-writer", LOG_CONS | LOG_PID, LOG_DAEMON);
|
||
|
|
xs = xs_domain_open();
|
||
|
|
if (!xs) {
|
||
|
|
syslog(LOG_DAEMON | LOG_ERR, "xs_domain_open");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
for (;;) {
|
||
|
|
fd = open("/proc/meminfo", O_RDONLY);
|
||
|
|
if (fd < 0) {
|
||
|
|
syslog(LOG_DAEMON | LOG_ERR,
|
||
|
|
"error opening /proc/meminfo ?");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
n = read(fd, buf, sizeof(buf));
|
||
|
|
if (n <= 0) {
|
||
|
|
syslog(LOG_DAEMON | LOG_ERR,
|
||
|
|
"error reading /proc/meminfo ?");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
close(fd);
|
||
|
|
if (!xs_write(xs, XBT_NULL, "memory/meminfo", buf, n)) {
|
||
|
|
syslog(LOG_DAEMON | LOG_ERR,
|
||
|
|
"error writing xenstore ?");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
sleep(1);
|
||
|
|
}
|
||
|
|
}
|