2 * (C) 2010,2011 Thomas Renninger <trenn@suse.de>, Novell Inc.
4 * Licensed under the terms of the GNU GPL License version 2.
6 * Ideas taken over from the perf userspace tool (included in the Linus
7 * kernel git repo): subcommand builtins and param parsing.
15 #include <sys/types.h>
17 #include <sys/utsname.h>
20 #include "helpers/helpers.h"
21 #include "helpers/bitmask.h"
23 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
25 static int cmd_help(int argc, const char **argv);
27 /* Global cpu_info object available for all binaries
28 * Info only retrieved from CPU 0
30 * Values will be zero/unknown on non X86 archs
32 struct cpupower_cpu_info cpupower_cpu_info;
34 /* Affected cpus chosen by -c/--cpu param */
35 struct bitmask *cpus_chosen;
41 static void print_help(void);
45 int (*main)(int, const char **);
49 static struct cmd_struct commands[] = {
50 { "frequency-info", cmd_freq_info, 0 },
51 { "frequency-set", cmd_freq_set, 1 },
52 { "idle-info", cmd_idle_info, 0 },
53 { "idle-set", cmd_idle_set, 1 },
54 { "set", cmd_set, 1 },
55 { "info", cmd_info, 0 },
56 { "monitor", cmd_monitor, 0 },
57 { "help", cmd_help, 0 },
58 /* { "bench", cmd_bench, 1 }, */
61 static void print_help(void)
66 printf(_("Usage:\tcpupower [-d|--debug] [-c|--cpu cpulist ] <command> [<args>]\n"));
68 printf(_("Usage:\tcpupower [-c|--cpu cpulist ] <command> [<args>]\n"));
70 printf(_("Supported commands are:\n"));
71 for (i = 0; i < ARRAY_SIZE(commands); i++)
72 printf("\t%s\n", commands[i].cmd);
73 printf(_("\nNot all commands can make use of the -c cpulist option.\n"));
74 printf(_("\nUse 'cpupower help <command>' for getting help for above commands.\n"));
77 static int print_man_page(const char *subpage)
82 len = 10; /* enough for "cpupower-" */
84 len += strlen(subpage);
90 sprintf(page, "cpupower");
91 if ((subpage != NULL) && strcmp(subpage, "help")) {
93 strcat(page, subpage);
96 execlp("man", "man", page, NULL);
98 /* should not be reached */
102 static int cmd_help(int argc, const char **argv)
105 print_man_page(argv[1]); /* exits within execlp() */
113 static void print_version(void)
115 printf(PACKAGE " " VERSION "\n");
116 printf(_("Report errors and bugs to %s, please.\n"), PACKAGE_BUGREPORT);
119 static void handle_options(int *argc, const char ***argv)
121 int ret, x, new_argc = 0;
126 for (x = 0; x < *argc && ((*argv)[x])[0] == '-'; x++) {
127 const char *param = (*argv)[x];
128 if (!strcmp(param, "-h") || !strcmp(param, "--help")) {
131 } else if (!strcmp(param, "-c") || !strcmp(param, "--cpu")) {
136 if (!strcmp((*argv)[x+1], "all"))
137 bitmask_setall(cpus_chosen);
139 ret = bitmask_parselist(
140 (*argv)[x+1], cpus_chosen);
142 fprintf(stderr, _("Error parsing cpu "
148 /* Cut out param: cpupower -c 1 info -> cpupower info */
151 } else if (!strcmp(param, "-v") ||
152 !strcmp(param, "--version")) {
156 } else if (!strcmp(param, "-d") || !strcmp(param, "--debug")) {
162 fprintf(stderr, "Unknown option: %s\n", param);
171 int main(int argc, const char *argv[])
178 cpus_chosen = bitmask_alloc(sysconf(_SC_NPROCESSORS_CONF));
183 handle_options(&argc, &argv);
192 setlocale(LC_ALL, "");
195 /* Turn "perf cmd --help" into "perf help cmd" */
196 if (argc > 1 && !strcmp(argv[1], "--help")) {
198 argv[0] = cmd = "help";
201 get_cpu_info(0, &cpupower_cpu_info);
202 run_as_root = !geteuid();
205 if (!ret && !strcmp(uts.machine, "x86_64") &&
206 stat("/dev/cpu/0/msr", &statbuf) != 0) {
207 if (system("modprobe msr") == -1)
208 fprintf(stderr, _("MSR access not available.\n"));
213 for (i = 0; i < ARRAY_SIZE(commands); i++) {
214 struct cmd_struct *p = commands + i;
215 if (strcmp(p->cmd, cmd))
217 if (!run_as_root && p->needs_root) {
218 fprintf(stderr, _("Subcommand %s needs root "
219 "privileges\n"), cmd);
222 ret = p->main(argc, argv);
224 bitmask_free(cpus_chosen);