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/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
/***
This file is part of systemd.
Copyright 2013 Zbigniew Jędrzejewski-Szmek
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <stdio.h>
#include "conf-parser.h"
#include "sleep-config.h"
#include "fileio.h"
#include "log.h"
#include "strv.h"
#include "util.h"
int parse_sleep_config(const char *verb, char ***modes, char ***states) {
_cleanup_strv_free_ char
**suspend_mode = NULL, **suspend_state = NULL,
**hibernate_mode = NULL, **hibernate_state = NULL,
**hybrid_mode = NULL, **hybrid_state = NULL;
const ConfigTableItem items[] = {
{ "Sleep", "SuspendMode", config_parse_strv, 0, &suspend_mode },
{ "Sleep", "SuspendState", config_parse_strv, 0, &suspend_state },
{ "Sleep", "HibernateMode", config_parse_strv, 0, &hibernate_mode },
{ "Sleep", "HibernateState", config_parse_strv, 0, &hibernate_state },
{ "Sleep", "HybridSleepMode", config_parse_strv, 0, &hybrid_mode },
{ "Sleep", "HybridSleepState", config_parse_strv, 0, &hybrid_state },
{}};
int r;
FILE _cleanup_fclose_ *f;
f = fopen(PKGSYSCONFDIR "/sleep.conf", "re");
if (!f)
log_full(errno == ENOENT ? LOG_DEBUG: LOG_WARNING,
"Failed to open configuration file " PKGSYSCONFDIR "/sleep.conf: %m");
else {
r = config_parse(NULL, PKGSYSCONFDIR "/sleep.conf", f, "Sleep\0",
config_item_table_lookup, (void*) items, false, false, NULL);
if (r < 0)
log_warning("Failed to parse configuration file: %s", strerror(-r));
}
if (streq(verb, "suspend")) {
/* empty by default */
*modes = suspend_mode;
if (suspend_state)
*states = suspend_state;
else
*states = strv_split_nulstr("mem\0standby\0freeze\0");
suspend_mode = suspend_state = NULL;
} else if (streq(verb, "hibernate")) {
if (hibernate_mode)
*modes = hibernate_mode;
else
*modes = strv_split_nulstr("platform\0shutdown\0");
if (hibernate_state)
*states = hibernate_state;
else
*states = strv_split_nulstr("disk\0");
hibernate_mode = hibernate_state = NULL;
} else if (streq(verb, "hybrid-sleep")) {
if (hybrid_mode)
*modes = hybrid_mode;
else
*modes = strv_split_nulstr("suspend\0platform\0shutdown\0");
if (hybrid_state)
*states = hybrid_state;
else
*states = strv_split_nulstr("disk\0");
hybrid_mode = hybrid_state = NULL;
} else
assert_not_reached("what verb");
if (!modes || !states) {
strv_free(*modes);
strv_free(*states);
return log_oom();
}
return 0;
}
int can_sleep_state(char **types) {
char *w, *state, **type;
int r;
_cleanup_free_ char *p = NULL;
if (strv_isempty(types))
return true;
/* If /sys is read-only we cannot sleep */
if (access("/sys/power/state", W_OK) < 0)
return false;
r = read_one_line_file("/sys/power/state", &p);
if (r < 0)
return false;
STRV_FOREACH(type, types) {
size_t l, k;
k = strlen(*type);
FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state)
if (l == k && memcmp(w, *type, l) == 0)
return true;
}
return false;
}
int can_sleep_disk(char **types) {
char *w, *state, **type;
int r;
_cleanup_free_ char *p = NULL;
if (strv_isempty(types))
return true;
/* If /sys is read-only we cannot sleep */
if (access("/sys/power/disk", W_OK) < 0)
return false;
r = read_one_line_file("/sys/power/disk", &p);
if (r < 0)
return false;
STRV_FOREACH(type, types) {
size_t l, k;
k = strlen(*type);
FOREACH_WORD_SEPARATOR(w, l, p, WHITESPACE, state) {
if (l == k && memcmp(w, *type, l) == 0)
return true;
if (l == k + 2 && w[0] == '[' && memcmp(w + 1, *type, l - 2) == 0 && w[l-1] == ']')
return true;
}
}
return false;
}
int can_sleep(const char *verb) {
_cleanup_strv_free_ char **modes = NULL, **states = NULL;
int r;
assert(streq(verb, "suspend") ||
streq(verb, "hibernate") ||
streq(verb, "hybrid-sleep"));
r = parse_sleep_config(verb, &modes, &states);
if (r < 0)
return false;
return can_sleep_state(states) && can_sleep_disk(modes);
}
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