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