src/ktrace.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Copyright (C) 2022 Google Inc, Steven Rostedt <rostedt@goodmis.org>
 */
#include "ktrace.h"

#define EXEC_NAME	"ktrace"

static void usage(char **argv)
{
	printf("usage: %s\n"
	       "\n", EXEC_NAME);
	exit(-1);
}

static void __vdie(const char *fmt, va_list ap, int err)
{
	int ret = errno;

	if (err && errno)
		perror(EXEC_NAME);
	else
		ret = -1;

	fprintf(stderr, "  ");
	vfprintf(stderr, fmt, ap);

	fprintf(stderr, "\n");
	exit(ret);
}

void pdie(const char *fmt, ...)
{
	va_list ap;

	va_start(ap, fmt);
	__vdie(fmt, ap, 1);
	va_end(ap);
}

int main (int argc, char **argv)
{
	struct ccli *ccli;
	struct tep_handle *tep;

	tep = tracefs_local_events(NULL);
	if (!tep) {
		if (errno == EPERM)
			pdie("Failed to initialize tracing directory.\n"
			     "   You do not have permission to read it");
		pdie("Failed to initialize tracing directory");
	}
	ccli = ccli_alloc("ktrace> ", STDIN_FILENO, STDOUT_FILENO);
	if (!ccli)
		pdie("ccli initialization");

	ccli_register_command(ccli, "create", cmd_create, tep);
	ccli_register_completion(ccli, "create", create_completion);

	ccli_loop(ccli);
	ccli_free(ccli);

	tep_free(tep);

	return 0;
}