63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/*
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* The Qubes OS Project, http://www.qubes-os.org
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*
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* Copyright (C) 2010 Rafal Wojtczuk <rafal@invisiblethingslab.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#include <sys/types.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <xs.h>
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#include <syslog.h>
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int main()
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{
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struct xs_handle *xs;
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int fd, n;
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char buf[4096];
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openlog("meminfo-writer", LOG_CONS | LOG_PID, LOG_DAEMON);
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xs = xs_domain_open();
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if (!xs) {
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syslog(LOG_DAEMON | LOG_ERR, "xs_domain_open");
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exit(1);
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}
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for (;;) {
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fd = open("/proc/meminfo", O_RDONLY);
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if (fd < 0) {
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syslog(LOG_DAEMON | LOG_ERR,
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"error opening /proc/meminfo ?");
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exit(1);
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}
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n = read(fd, buf, sizeof(buf));
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if (n <= 0) {
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syslog(LOG_DAEMON | LOG_ERR,
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"error reading /proc/meminfo ?");
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exit(1);
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}
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close(fd);
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if (!xs_write(xs, XBT_NULL, "memory/meminfo", buf, n)) {
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syslog(LOG_DAEMON | LOG_ERR,
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"error writing xenstore ?");
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exit(1);
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}
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sleep(1);
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}
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}
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