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fc1dcb1e56
Add a config option and base functionality that takes the option argument (if specified) and other system config locations and produces an 'acting' config file path. The actual config file processing is coming in following patches. Signed-off-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Alexei Budankov <abudankov@huawei.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: https://lore.kernel.org/r/20210208200908.1019149-3-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
131 lines
2.6 KiB
C
131 lines
2.6 KiB
C
// 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 "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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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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}
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static int setup_config(struct daemon *daemon)
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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_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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return -1;
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}
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