diff options
Diffstat (limited to 'tools/power/cpupower/utils/cpupower.c')
| -rw-r--r-- | tools/power/cpupower/utils/cpupower.c | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/tools/power/cpupower/utils/cpupower.c b/tools/power/cpupower/utils/cpupower.c new file mode 100644 index 00000000000..b048e559535 --- /dev/null +++ b/tools/power/cpupower/utils/cpupower.c @@ -0,0 +1,201 @@ +/* + * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc. + * + * Licensed under the terms of the GNU GPL License version 2. + * + * Ideas taken over from the perf userspace tool (included in the Linus + * kernel git repo): subcommand builtins and param parsing. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#include "builtin.h" +#include "helpers/helpers.h" +#include "helpers/bitmask.h" + +struct cmd_struct { + const char *cmd; + int (*main)(int, const char **); + void (*usage)(void); + int needs_root; +}; + +#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) + +int cmd_help(int argc, const char **argv); + +/* Global cpu_info object available for all binaries + * Info only retrieved from CPU 0 + * + * Values will be zero/unknown on non X86 archs + */ +struct cpupower_cpu_info cpupower_cpu_info; +int run_as_root; +/* Affected cpus chosen by -c/--cpu param */ +struct bitmask *cpus_chosen; + +#ifdef DEBUG +int be_verbose; +#endif + +static void print_help(void); + +static struct cmd_struct commands[] = { + { "frequency-info", cmd_freq_info, freq_info_help, 0 }, + { "frequency-set", cmd_freq_set, freq_set_help, 1 }, + { "idle-info", cmd_idle_info, idle_info_help, 0 }, + { "set", cmd_set, set_help, 1 }, + { "info", cmd_info, info_help, 0 }, + { "monitor", cmd_monitor, monitor_help, 0 }, + { "help", cmd_help, print_help, 0 }, + // { "bench", cmd_bench, NULL, 1 }, +}; + +int cmd_help(int argc, const char **argv) +{ + unsigned int i; + + if (argc > 1) { + for (i = 0; i < ARRAY_SIZE(commands); i++) { + struct cmd_struct *p = commands + i; + if (strcmp(p->cmd, argv[1])) + continue; + if (p->usage) { + p->usage(); + return EXIT_SUCCESS; + } + } + } + print_help(); + if (argc == 1) + return EXIT_SUCCESS; /* cpupower help */ + return EXIT_FAILURE; +} + +static void print_help(void) +{ + unsigned int i; + +#ifdef DEBUG + printf(_("cpupower [ -d ][ -c cpulist ] subcommand [ARGS]\n")); + printf(_(" -d, --debug May increase output (stderr) on some subcommands\n")); +#else + printf(_("cpupower [ -c cpulist ] subcommand [ARGS]\n")); +#endif + printf(_("cpupower --version\n")); + printf(_("Supported subcommands are:\n")); + for (i = 0; i < ARRAY_SIZE(commands); i++) + printf("\t%s\n", commands[i].cmd); + printf(_("\nSome subcommands can make use of the -c cpulist option.\n")); + printf(_("Look at the general cpupower manpage how to use it\n")); + printf(_("and read up the subcommand's manpage whether it is supported.\n")); + printf(_("\nUse cpupower help subcommand for getting help for above subcommands.\n")); +} + +static void print_version(void) { + printf(PACKAGE " " VERSION "\n"); + printf(_("Report errors and bugs to %s, please.\n"), PACKAGE_BUGREPORT); +} + +static void handle_options(int *argc, const char ***argv) +{ + int ret, x, new_argc = 0; + + if (*argc < 1) + return; + + for (x = 0; x < *argc && ((*argv)[x])[0] == '-'; x++) { + const char *param = (*argv)[x]; + if (!strcmp(param, "-h") || !strcmp(param, "--help")){ + print_help(); + exit(EXIT_SUCCESS); + } else if (!strcmp(param, "-c") || !strcmp(param, "--cpu")){ + if (*argc < 2) { + print_help(); + exit(EXIT_FAILURE); + } + if (!strcmp((*argv)[x+1], "all")) + bitmask_setall(cpus_chosen); + else { + ret = bitmask_parselist( + (*argv)[x+1], cpus_chosen); + if (ret < 0) { + fprintf(stderr, _("Error parsing cpu " + "list\n")); + exit(EXIT_FAILURE); + } + } + x += 1; + /* Cut out param: cpupower -c 1 info -> cpupower info */ + new_argc += 2; + continue; + } else if (!strcmp(param, "-v") || !strcmp(param, "--version")){ + print_version(); + exit(EXIT_SUCCESS); +#ifdef DEBUG + } else if (!strcmp(param, "-d") || !strcmp(param, "--debug")){ + be_verbose = 1; + new_argc ++; + continue; +#endif + } else { + fprintf(stderr, "Unknown option: %s\n", param); + print_help(); + exit(EXIT_FAILURE); + } + } + *argc -= new_argc; + *argv += new_argc; +} + +int main(int argc, const char *argv[]) +{ + const char *cmd; + unsigned int i, ret; + + cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF)); + + argc--; + argv += 1; + + handle_options(&argc, &argv); + + cmd = argv[0]; + + if (argc < 1) { + print_help(); + return EXIT_FAILURE; + } + + setlocale(LC_ALL, ""); + textdomain (PACKAGE); + + /* Turn "perf cmd --help" into "perf help cmd" */ + if (argc > 1 && !strcmp(argv[1], "--help")) { + argv[1] = argv[0]; + argv[0] = cmd = "help"; + } + + get_cpu_info(0, &cpupower_cpu_info); + run_as_root = !getuid(); + + for (i = 0; i < ARRAY_SIZE(commands); i++) { + struct cmd_struct *p = commands + i; + if (strcmp(p->cmd, cmd)) + continue; + if (!run_as_root && p->needs_root) { + fprintf(stderr, _("Subcommand %s needs root " + "privileges\n"), cmd); + return EXIT_FAILURE; + } + ret = p->main(argc, argv); + if (cpus_chosen) + bitmask_free(cpus_chosen); + return ret; + } + print_help(); + return EXIT_FAILURE; +} |