X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=src%2Fsleep%2Fsleep.c;h=a56ab89e544133d36cbd03400e333f4c270dac0f;hp=f5e78c13c60a56947f92f09ed82f9b79ba9e861d;hb=19adb8a3204fefd91411b5f0f350c8bc6bcf75fe;hpb=b4bc041b1756aab117df40abdcc16a9dc2e72d07 diff --git a/src/sleep/sleep.c b/src/sleep/sleep.c index f5e78c13c..a56ab89e5 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 @@ -22,107 +23,200 @@ #include #include #include +#include -#include "log.h" -#include "util.h" #include "systemd/sd-id128.h" #include "systemd/sd-messages.h" +#include "log.h" +#include "util.h" +#include "strv.h" #include "fileio.h" +#include "build.h" +#include "sleep-config.h" + +static char* arg_verb = NULL; + +static int write_mode(char **modes) { + int r = 0; + char **mode; + + STRV_FOREACH(mode, modes) { + int k = write_string_file("/sys/power/disk", *mode); + if (k == 0) + return 0; + log_debug("Failed to write '%s' to /sys/power/disk: %s", + *mode, strerror(-k)); + if (r == 0) + r = k; + } -int main(int argc, char *argv[]) { - const char *verb; - char* arguments[4]; - int r; - FILE *f; + if (r < 0) + log_error("Failed to write mode to /sys/power/disk: %s", + strerror(-r)); - log_set_target(LOG_TARGET_AUTO); - log_parse_environment(); - log_open(); + return r; +} - if (argc != 2) { - log_error("Invalid number of arguments."); - r = -EINVAL; - goto finish; +static int write_state(FILE *f0, char **states) { + FILE _cleanup_fclose_ *f = f0; + char **state; + int r = 0; + + STRV_FOREACH(state, states) { + int k; + + k = write_string_to_file(f, *state); + if (k == 0) + return 0; + log_debug("Failed to write '%s' to /sys/power/state: %s", + *state, strerror(-k)); + if (r == 0) + r = k; + + fclose(f); + f = fopen("/sys/power/state", "we"); + if (!f) { + log_error("Failed to open /sys/power/state: %m"); + return -errno; + } } - 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; - } + return r; +} - /* Configure the hibernation mode */ - if (streq(argv[1], "hibernate")) { - if (write_string_file("/sys/power/disk", "platform") < 0) - write_string_file("/sys/power/disk", "shutdown"); - } else if (streq(argv[1], "hybrid-sleep")) { - if (write_string_file("/sys/power/disk", "suspend") < 0) - if (write_string_file("/sys/power/disk", "platform") < 0) - write_string_file("/sys/power/disk", "shutdown"); - } +static int execute(char **modes, char **states) { + char* arguments[4]; + int r; + FILE *f; + const char* note = strappenda("SLEEP=", arg_verb); + /* This file is opened first, so that if we hit an error, + * we can abort before modyfing any state. */ f = fopen("/sys/power/state", "we"); if (!f) { log_error("Failed to open /sys/power/state: %m"); - r = -errno; - goto finish; + return -errno; } + /* Configure the hibernation mode */ + r = write_mode(modes); + if (r < 0) + return r; + arguments[0] = NULL; arguments[1] = (char*) "pre"; - arguments[2] = argv[1]; + arguments[2] = arg_verb; 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); + log_struct(LOG_INFO, + MESSAGE_ID(SD_MESSAGE_SLEEP_START), + "MESSAGE=Suspending system...", + note, + NULL); + + r = write_state(f, states); + if (r < 0) + return r; + + log_struct(LOG_INFO, + MESSAGE_ID(SD_MESSAGE_SLEEP_STOP), + "MESSAGE=System resumed.", + note, + NULL); arguments[1] = (char*) "post"; execute_directory(SYSTEM_SLEEP_PATH, NULL, arguments); - fclose(f); + return r; +} -finish: +static int 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 + ); + + return 0; +} - return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; +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 }, + { NULL, 0, NULL, 0 } + }; + + 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: + log_error("Unknown option code %c", c); + return -EINVAL; + } + + if (argc - optind != 1) { + log_error("Usage: %s COMMAND", + program_invocation_short_name); + return -EINVAL; + } + + 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; + } + + return 1 /* work to do */; +} + +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(); + + r = parse_argv(argc, argv); + if (r <= 0) + goto finish; + + r = parse_sleep_config(arg_verb, &modes, &states); + if (r < 0) + goto finish; + + r = execute(modes, states); + +finish: + return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }