2021-02-08 20:08:45 +00:00
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// SPDX-License-Identifier: GPL-2.0
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#include <subcmd/parse-options.h>
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#include <linux/limits.h>
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#include <string.h>
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#include <signal.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <errno.h>
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#include "builtin.h"
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#include "perf.h"
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#include "debug.h"
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#include "config.h"
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#include "util.h"
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struct daemon {
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const char *config;
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char *config_real;
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const char *base_user;
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char *base;
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FILE *out;
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char perf[PATH_MAX];
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};
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static struct daemon __daemon = { };
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static const char * const daemon_usage[] = {
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"perf daemon start [<options>]",
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"perf daemon [<options>]",
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NULL
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};
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static bool done;
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static void sig_handler(int sig __maybe_unused)
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{
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done = true;
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}
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static void daemon__exit(struct daemon *daemon)
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{
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free(daemon->config_real);
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free(daemon->base);
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}
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static int setup_config(struct daemon *daemon)
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{
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if (daemon->base_user) {
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daemon->base = strdup(daemon->base_user);
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if (!daemon->base)
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return -ENOMEM;
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}
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if (daemon->config) {
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char *real = realpath(daemon->config, NULL);
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if (!real) {
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perror("failed: realpath");
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return -1;
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}
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daemon->config_real = real;
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return 0;
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}
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if (perf_config_system() && !access(perf_etc_perfconfig(), R_OK))
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daemon->config_real = strdup(perf_etc_perfconfig());
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else if (perf_config_global() && perf_home_perfconfig())
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daemon->config_real = strdup(perf_home_perfconfig());
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return daemon->config_real ? 0 : -1;
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}
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static int __cmd_start(struct daemon *daemon, struct option parent_options[],
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int argc, const char **argv)
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{
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struct option start_options[] = {
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OPT_PARENT(parent_options),
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OPT_END()
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};
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int err = 0;
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argc = parse_options(argc, argv, start_options, daemon_usage, 0);
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if (argc)
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usage_with_options(daemon_usage, start_options);
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if (setup_config(daemon)) {
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pr_err("failed: config not found\n");
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return -1;
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}
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debug_set_file(daemon->out);
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debug_set_display_time(true);
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pr_info("daemon started (pid %d)\n", getpid());
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signal(SIGINT, sig_handler);
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signal(SIGTERM, sig_handler);
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while (!done && !err) {
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sleep(1);
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}
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daemon__exit(daemon);
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pr_info("daemon exited\n");
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fclose(daemon->out);
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return err;
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}
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int cmd_daemon(int argc, const char **argv)
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{
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struct option daemon_options[] = {
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OPT_INCR('v', "verbose", &verbose, "be more verbose"),
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OPT_STRING(0, "config", &__daemon.config,
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"config file", "config file path"),
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OPT_STRING(0, "base", &__daemon.base_user,
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"directory", "base directory"),
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OPT_END()
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};
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perf_exe(__daemon.perf, sizeof(__daemon.perf));
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__daemon.out = stdout;
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argc = parse_options(argc, argv, daemon_options, daemon_usage,
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PARSE_OPT_STOP_AT_NON_OPTION);
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if (argc) {
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if (!strcmp(argv[0], "start"))
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return __cmd_start(&__daemon, daemon_options, argc, argv);
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pr_err("failed: unknown command '%s'\n", argv[0]);
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return -1;
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}
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if (setup_config(&__daemon)) {
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pr_err("failed: config not found\n");
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return -1;
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}
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2021-02-08 20:08:45 +00:00
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return -1;
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}
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