X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fsleep%2Fsleep.c;h=2fb5f0c8e049167801a1416453cf9adcf73fdd3f;hp=218de3a5675711ab32b1d38e9930ed6d9e60cf32;hb=4968105790c65af58d4ab42bffa2a4bedc0be8ee;hpb=f274ece0f76b5709408821e317e87aef76123db6 diff --git a/src/sleep/sleep.c b/src/sleep/sleep.c index 218de3a56..2fb5f0c8e 100644 --- a/src/sleep/sleep.c +++ b/src/sleep/sleep.c @@ -4,6 +4,7 @@ This file is part of systemd. Copyright 2012 Lennart Poettering + 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 @@ -22,106 +23,196 @@ #include #include #include +#include +#include "sd-id128.h" +#include "sd-messages.h" #include "log.h" #include "util.h" -#include "systemd/sd-id128.h" -#include "systemd/sd-messages.h" +#include "strv.h" +#include "fileio.h" +#include "build.h" +#include "sleep-config.h" +#include "def.h" -int main(int argc, char *argv[]) { - const char *verb; - char* arguments[4]; - int r; - FILE *f; +static char* arg_verb = NULL; - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); +static int write_mode(char **modes) { + int r = 0; + char **mode; - if (argc != 2) { - log_error("Invalid number of arguments."); - r = -EINVAL; - goto finish; + STRV_FOREACH(mode, modes) { + int k; + + k = write_string_file("/sys/power/disk", *mode); + if (k == 0) + return 0; + + log_debug_errno(k, "Failed to write '%s' to /sys/power/disk: %m", + *mode); + if (r == 0) + r = k; } - if (streq(argv[1], "suspend")) - verb = "mem"; - else if (streq(argv[1], "hibernate") || streq(argv[1], "hybrid-sleep")) - verb = "disk"; - else { - log_error("Unknown action '%s'.", argv[1]); - r = -EINVAL; - goto finish; + if (r < 0) + log_error_errno(r, "Failed to write mode to /sys/power/disk: %m"); + + return r; +} + +static int write_state(FILE **f, char **states) { + char **state; + int r = 0; + + STRV_FOREACH(state, states) { + int k; + + k = write_string_stream(*f, *state); + if (k == 0) + return 0; + log_debug_errno(k, "Failed to write '%s' to /sys/power/state: %m", + *state); + if (r == 0) + r = k; + + fclose(*f); + *f = fopen("/sys/power/state", "we"); + if (!*f) + return log_error_errno(errno, "Failed to open /sys/power/state: %m"); } + return r; +} + +static int execute(char **modes, char **states) { + + char *arguments[] = { + NULL, + (char*) "pre", + arg_verb, + NULL + }; + + int r; + _cleanup_fclose_ FILE *f = NULL; + + /* This file is opened first, so that if we hit an error, + * we can abort before modifying any state. */ + f = fopen("/sys/power/state", "we"); + if (!f) + return log_error_errno(errno, "Failed to open /sys/power/state: %m"); + /* Configure the hibernation mode */ - if (streq(argv[1], "hibernate")) { - if (write_one_line_file("/sys/power/disk", "platform") < 0) - write_one_line_file("/sys/power/disk", "shutdown"); - } else if (streq(argv[1], "hybrid-sleep")) { - if (write_one_line_file("/sys/power/disk", "suspend") < 0) - if (write_one_line_file("/sys/power/disk", "platform") < 0) - write_one_line_file("/sys/power/disk", "shutdown"); + r = write_mode(modes); + if (r < 0) + return r; + + execute_directory(SYSTEM_SLEEP_PATH, DEFAULT_TIMEOUT_USEC, arguments); + + log_struct(LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_START), + LOG_MESSAGE("Suspending system..."), + "SLEEP=%s", arg_verb, + NULL); + + r = write_state(&f, states); + if (r < 0) + return r; + + log_struct(LOG_INFO, + LOG_MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), + LOG_MESSAGE("System resumed."), + "SLEEP=%s", arg_verb, + NULL); + + arguments[1] = (char*) "post"; + execute_directory(SYSTEM_SLEEP_PATH, DEFAULT_TIMEOUT_USEC, arguments); + + return r; +} + +static void help(void) { + printf("%s COMMAND\n\n" + "Suspend the system, hibernate the system, or both.\n\n" + "Commands:\n" + " -h --help Show this help and exit\n" + " --version Print version string and exit\n" + " suspend Suspend the system\n" + " hibernate Hibernate the system\n" + " hybrid-sleep Both hibernate and suspend the system\n" + , program_invocation_short_name); +} + +static int parse_argv(int argc, char *argv[]) { + enum { + ARG_VERSION = 0x100, + }; + + static const struct option options[] = { + { "help", no_argument, NULL, 'h' }, + { "version", no_argument, NULL, ARG_VERSION }, + {} + }; + + int c; + + assert(argc >= 0); + assert(argv); + + while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0) + switch(c) { + case 'h': + help(); + return 0; /* done */ + + case ARG_VERSION: + puts(PACKAGE_STRING); + puts(SYSTEMD_FEATURES); + return 0 /* done */; + + case '?': + return -EINVAL; + + default: + assert_not_reached("Unhandled option"); + } + + if (argc - optind != 1) { + log_error("Usage: %s COMMAND", + program_invocation_short_name); + return -EINVAL; } - f = fopen("/sys/power/state", "we"); - if (!f) { - log_error("Failed to open /sys/power/state: %m"); - r = -errno; - goto finish; + arg_verb = argv[optind]; + + if (!streq(arg_verb, "suspend") && + !streq(arg_verb, "hibernate") && + !streq(arg_verb, "hybrid-sleep")) { + log_error("Unknown command '%s'.", arg_verb); + return -EINVAL; } - arguments[0] = NULL; - arguments[1] = (char*) "pre"; - arguments[2] = argv[1]; - arguments[3] = NULL; - execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); - - if (streq(argv[1], "suspend")) - log_struct(LOG_INFO, - MESSAGE_ID(SD_MESSAGE_SLEEP_START), - "MESSAGE=Suspending system...", - "SLEEP=suspend", - NULL); - else if (streq(argv[1], "hibernate")) - log_struct(LOG_INFO, - MESSAGE_ID(SD_MESSAGE_SLEEP_START), - "MESSAGE=Hibernating system...", - "SLEEP=hibernate", - NULL); - else - log_struct(LOG_INFO, - MESSAGE_ID(SD_MESSAGE_SLEEP_START), - "MESSAGE=Hibernating and suspending system...", - "SLEEP=hybrid-sleep", - NULL); - - fputs(verb, f); - fputc('\n', f); - fflush(f); - - r = ferror(f) ? -errno : 0; - - if (streq(argv[1], "suspend")) - log_struct(LOG_INFO, - MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), - "MESSAGE=System resumed.", - "SLEEP=suspend", - NULL); - else - log_struct(LOG_INFO, - MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), - "MESSAGE=System thawed.", - "SLEEP=hibernate", - NULL); + return 1 /* work to do */; +} - arguments[1] = (char*) "post"; - execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); +int main(int argc, char *argv[]) { + _cleanup_strv_free_ char **modes = NULL, **states = NULL; + int r; + + log_set_target(LOG_TARGET_AUTO); + log_parse_environment(); + log_open(); - fclose(f); + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; -finish: + r = parse_sleep_config(arg_verb, &modes, &states); + if (r < 0) + goto finish; - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; + r = execute(modes, states); +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }