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/*
* Suspend-to-RAM
*
* Copyright 2006 Pavel Machek <pavel@suse.cz>
* Distribute under GPLv2.
*/
#include <stdio.h>
#include <stdlib.h>
#include <getopt.h>
#include <errno.h>
#include <string.h>
#ifndef S2RAM
#define S2RAM
#endif
#include "vt.h"
#include "s2ram.h"
#include "config.h"
/* Actually enter the suspend. May be ran on frozen system. */
int s2ram_generic_do(void)
{
int ret = 0;
FILE *f = fopen("/sys/power/state", "w");
if (!f) {
printf("/sys/power/state does not exist; what kind of ninja mutant machine is this?\n");
return ENODEV;
}
if (fprintf(f, "mem") < 0) {
ret = errno;
perror("s2ram_do");
}
/* usually only fclose fails, not fprintf, so it does not matter
* that we might overwrite the previous error.
*/
if (fclose(f) < 0) {
ret = errno;
perror("s2ram_do");
}
return ret;
}
#ifndef CONFIG_BOTH
int main(int argc, char *argv[])
{
int i, ret = 0;
int active_console = -1;
struct option options[] = {
{
"help\0\tthis text.",
no_argument, NULL, 'h'
},
{
"test\0\ttest if the machine is in the database.",
no_argument, NULL, 'n'
},
{
"identify\0prints a string that identifies the machine.",
no_argument, NULL, 'i'
},
HACKS_LONG_OPTS
{ NULL, 0, NULL, 0 }
};
const char *optstring = "hni" "fspmrva:";
while ((i = getopt_long(argc, argv, optstring, options, NULL)) != -1) {
switch (i) {
case 'h':
usage("s2ram", options, optstring);
exit(0);
case 'i':
identify_machine();
exit(0);
case 'n':
machine_known();
exit(0);
case '?':
usage("s2ram", options, optstring);
exit(1);
break;
default:
s2ram_add_flag(i,optarg);
break;
}
}
ret = s2ram_is_supported();
if (ret == S2RAM_UNKNOWN) {
printf("Machine is unknown.\n");
identify_machine();
goto out;
}
if (ret == S2RAM_NOFB)
printf("This machine can only suspend without framebuffer.\n");
if (ret)
goto out;
/* switch to console 1 first, since we might be in X */
active_console = fgconsole();
printf("Switching from vt%d to vt1\n", active_console);
chvt(1);
ret = s2ram_hacks();
if (ret)
goto out;
ret = s2ram_do();
s2ram_resume();
out:
/* if we switched consoles before suspend, switch back */
if (active_console > 0) {
printf("switching back to vt%d\n", active_console);
chvt(active_console);
}
return ret;
}
#endif
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