+++ /dev/null
-/***
- 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 <errno.h>
-#include <stdbool.h>
-#include <stddef.h>
-#include <stdio.h>
-#include <string.h>
-#include <syslog.h>
-#include <unistd.h>
-
-#include "alloc-util.h"
-#include "conf-parser.h"
-#include "def.h"
-#include "fd-util.h"
-#include "fileio.h"
-#include "log.h"
-#include "macro.h"
-#include "parse-util.h"
-#include "sleep-config.h"
-#include "string-util.h"
-#include "strv.h"
-
-#define USE(x, y) do{ (x) = (y); (y) = NULL; } while(0)
-
-#if 0 /// UNNEEDED by elogind
-int parse_sleep_config(const char *verb, char ***_modes, char ***_states) {
-#else
-/// really only used in here.
-static int parse_sleep_config(const char *verb, char ***_modes, char ***_states) {
-#endif // 0
- _cleanup_strv_free_ char
- **suspend_mode = NULL, **suspend_state = NULL,
- **hibernate_mode = NULL, **hibernate_state = NULL,
- **hybrid_mode = NULL, **hybrid_state = NULL;
- char **modes, **states;
-
- 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 },
- {}
- };
-
-#if 0 /// elogind has its own config file
- config_parse_many(PKGSYSCONFDIR "/sleep.conf",
- CONF_PATHS_NULSTR("systemd/sleep.conf.d"),
- "Sleep\0", config_item_table_lookup, items,
- false, NULL);
-#else
- const char* logind_conf = getenv("ELOGIND_CONF_FILE");
- if (!logind_conf)
- logind_conf = PKGSYSCONFDIR "/logind.conf";
- config_parse(NULL, logind_conf, NULL, "Sleep\0",
- config_item_table_lookup, items, false,
- false, true, NULL);
-#endif // 0
-
- if (streq(verb, "suspend")) {
- /* empty by default */
- USE(modes, suspend_mode);
-
- if (suspend_state)
- USE(states, suspend_state);
- else
- states = strv_new("mem", "standby", "freeze", NULL);
-
- } else if (streq(verb, "hibernate")) {
- if (hibernate_mode)
- USE(modes, hibernate_mode);
- else
- modes = strv_new("platform", "shutdown", NULL);
-
- if (hibernate_state)
- USE(states, hibernate_state);
- else
- states = strv_new("disk", NULL);
-
- } else if (streq(verb, "hybrid-sleep")) {
- if (hybrid_mode)
- USE(modes, hybrid_mode);
- else
- modes = strv_new("suspend", "platform", "shutdown", NULL);
-
- if (hybrid_state)
- USE(states, hybrid_state);
- else
- states = strv_new("disk", NULL);
-
- } else
- assert_not_reached("what verb");
-
- if ((!modes && !streq(verb, "suspend")) || !states) {
- strv_free(modes);
- strv_free(states);
- return log_oom();
- }
-
- *_modes = modes;
- *_states = states;
- return 0;
-}
-
-int can_sleep_state(char **types) {
- char **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) {
- const char *word, *state;
- size_t l, k;
-
- k = strlen(*type);
- FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state)
- if (l == k && memcmp(word, *type, l) == 0)
- return true;
- }
-
- return false;
-}
-
-int can_sleep_disk(char **types) {
- char **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) {
- const char *word, *state;
- size_t l, k;
-
- k = strlen(*type);
- FOREACH_WORD_SEPARATOR(word, l, p, WHITESPACE, state) {
- if (l == k && memcmp(word, *type, l) == 0)
- return true;
-
- if (l == k + 2 &&
- word[0] == '[' &&
- memcmp(word + 1, *type, l - 2) == 0 &&
- word[l-1] == ']')
- return true;
- }
- }
-
- return false;
-}
-
-#define HIBERNATION_SWAP_THRESHOLD 0.98
-
-static int hibernation_partition_size(size_t *size, size_t *used) {
- _cleanup_fclose_ FILE *f;
- unsigned i;
-
- assert(size);
- assert(used);
-
- f = fopen("/proc/swaps", "re");
- if (!f) {
- log_full(errno == ENOENT ? LOG_DEBUG : LOG_WARNING,
- "Failed to retrieve open /proc/swaps: %m");
- assert(errno > 0);
- return -errno;
- }
-
- (void) fscanf(f, "%*s %*s %*s %*s %*s\n");
-
- for (i = 1;; i++) {
- _cleanup_free_ char *dev = NULL, *type = NULL;
- size_t size_field, used_field;
- int k;
-
- k = fscanf(f,
- "%ms " /* device/file */
- "%ms " /* type of swap */
- "%zu " /* swap size */
- "%zu " /* used */
- "%*i\n", /* priority */
- &dev, &type, &size_field, &used_field);
- if (k != 4) {
- if (k == EOF)
- break;
-
- log_warning("Failed to parse /proc/swaps:%u", i);
- continue;
- }
-
- if (streq(type, "partition") && endswith(dev, "\\040(deleted)")) {
- log_warning("Ignoring deleted swapfile '%s'.", dev);
- continue;
- }
-
- *size = size_field;
- *used = used_field;
- return 0;
- }
-
- log_debug("No swap partitions were found.");
- return -ENOSYS;
-}
-
-static bool enough_memory_for_hibernation(void) {
- _cleanup_free_ char *active = NULL;
- unsigned long long act = 0;
- size_t size = 0, used = 0;
- int r;
-
- r = hibernation_partition_size(&size, &used);
- if (r < 0)
- return false;
-
- r = get_proc_field("/proc/meminfo", "Active(anon)", WHITESPACE, &active);
- if (r < 0) {
- log_error_errno(r, "Failed to retrieve Active(anon) from /proc/meminfo: %m");
- return false;
- }
-
- r = safe_atollu(active, &act);
- if (r < 0) {
- log_error_errno(r, "Failed to parse Active(anon) from /proc/meminfo: %s: %m",
- active);
- return false;
- }
-
- r = act <= (size - used) * HIBERNATION_SWAP_THRESHOLD;
- log_debug("Hibernation is %spossible, Active(anon)=%llu kB, size=%zu kB, used=%zu kB, threshold=%.2g%%",
- r ? "" : "im", act, size, used, 100*HIBERNATION_SWAP_THRESHOLD);
-
- return r;
-}
-
-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;
-
- if (!can_sleep_state(states) || !can_sleep_disk(modes))
- return false;
-
- return streq(verb, "suspend") || enough_memory_for_hibernation();
-}
~ianmdlvl / elogind.git / blobdiff