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/*
* suspend functions for machines with Mac-style pmu
*
* Copyright 2006 Red Hat, Inc.
*
* Based on work from:
* Peter Jones <pjones@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of version 2 of the GNU General Public License as
* published by the Free Software Foundation.
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#define _GNU_SOURCE 1
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include <stdint.h>
/* XXX this is a total hack for bad system headers. */
typedef u_int32_t __u32;
#include <linux/pmu.h>
#if !defined(PMU_IOC_CAN_SLEEP) || !defined(PMU_IOC_SLEEP)
#error you must have working pmu kernel headers installed to build this program.
#endif
static int
pmu_sleep(const int fd)
{
unsigned long arg = 0;
if (ioctl(fd, PMU_IOC_CAN_SLEEP, &arg) < 0 || arg != 1)
return 1;
if (ioctl(fd, PMU_IOC_SLEEP, arg) < 0)
return 1;
return 0;
}
static inline int
print_usage(FILE *output, int retval)
{
fprintf(output, "usage: pm-pmu --suspend\n");
return retval;
}
int main(int argc, char *argv[])
{
if (argc != 2)
return print_usage(stderr, 1);
if (!strcmp(argv[1], "--help")) {
return print_usage(stdout, 0);
} else if (access("/dev/pmu", W_OK)) {
return 1;
} else if (!strcmp(argv[1], "--suspend")) {
int fd, ret;
if ((fd = open("/dev/pmu", O_RDWR)) < 0) {
perror("open");
return 1;
}
ret = pmu_sleep(fd);
close(fd);
return ret;
}
return print_usage(stderr, 1);
}
/*
* vim:ts=8:sw=4:sts=4:et
*/
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