[babeltrace.git] / converter / babeltrace.c

/*
 * babeltrace.c
 *
 * Babeltrace Trace Converter
 *
 * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
 *
 * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

#define _XOPEN_SOURCE 700
#include <config.h>
#include <babeltrace/babeltrace.h>
#include <babeltrace/format.h>
#include <babeltrace/context.h>
#include <babeltrace/ctf/types.h>
#include <babeltrace/ctf-text/types.h>
#include <babeltrace/iterator.h>
#include <popt.h>
#include <errno.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <ftw.h>
#include <dirent.h>
#include <unistd.h>

#define DEFAULT_FILE_ARRAY_SIZE	1
static char *opt_input_format;
static char *opt_output_format;

static const char *opt_input_path;
static const char *opt_output_path;

static struct trace_collection trace_collection_read;
static struct format *fmt_read;

void strlower(char *str)
{
	while (*str) {
		*str = tolower(*str);
		str++;
	}
}

enum {
	OPT_NONE = 0,
	OPT_HELP,
	OPT_LIST,
	OPT_VERBOSE,
	OPT_DEBUG,
	OPT_NAMES,
	OPT_NO_DELTA,
};

static struct poptOption long_options[] = {
	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	{ "input-format", 'i', POPT_ARG_STRING, &opt_input_format, OPT_NONE, NULL, NULL },
	{ "output-format", 'o', POPT_ARG_STRING, &opt_output_format, OPT_NONE, NULL, NULL },
	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
	{ "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
	{ "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
	{ "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
	{ "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
	{ "no-delta", 0, POPT_ARG_NONE, NULL, OPT_NO_DELTA, NULL, NULL },
	{ NULL, 0, 0, NULL, 0, NULL, NULL },
};

static void list_formats(FILE *fp)
{
	fprintf(fp, "\n");
	bt_fprintf_format_list(fp);
}

static void usage(FILE *fp)
{
	fprintf(fp, "BabelTrace Trace Converter %s\n\n", VERSION);
	fprintf(fp, "usage : babeltrace [OPTIONS] INPUT <OUTPUT>\n");
	fprintf(fp, "\n");
	fprintf(fp, "  INPUT                          Input trace path\n");
	fprintf(fp, "  OUTPUT                         Output trace path (default: stdout)\n");
	fprintf(fp, "\n");
	fprintf(fp, "  -i, --input-format FORMAT      Input trace format (default: ctf)\n");
	fprintf(fp, "  -o, --output-format FORMAT     Output trace format (default: text)\n");
	fprintf(fp, "\n");
	fprintf(fp, "  -h, --help                     This help message\n");
	fprintf(fp, "  -l, --list                     List available formats\n");
	fprintf(fp, "  -v, --verbose                  Verbose mode\n");
	fprintf(fp, "                                 (or set BABELTRACE_VERBOSE environment variable)\n");
	fprintf(fp, "  -d, --debug                    Debug mode\n");
	fprintf(fp, "                                 (or set BABELTRACE_DEBUG environment variable)\n");
	fprintf(fp, "      --no-delta                 Do not print time delta between consecutive events\n");
	fprintf(fp, "  -n, --names name1<,name2,...>  Print field names.\n");
	fprintf(fp, "                                 Available field names:\n");
	fprintf(fp, "                                     (payload OR args OR arg)\n");
	fprintf(fp, "                                     all, scope, header, (context OR ctx)\n");
	fprintf(fp, "                                     trace, trace:domain, trace:procname, trace:vpid,\n");
	fprintf(fp, "                                     loglevel.\n");
	fprintf(fp, "                                        (payload active by default)\n");
	list_formats(fp);
	fprintf(fp, "\n");
}

static int get_names_args(poptContext *pc)
{
	char *str, *strlist, *strctx;

	opt_payload_field_names = 0;
	strlist = (char *) poptGetOptArg(*pc);
	if (!strlist) {
		return -EINVAL;
	}
	str = strtok_r(strlist, ",", &strctx);
	do {
		if (!strcmp(str, "all"))
			opt_all_field_names = 1;
		else if (!strcmp(str, "scope"))
			opt_scope_field_names = 1;
		else if (!strcmp(str, "context") || !strcmp(str, "ctx"))
			opt_context_field_names = 1;
		else if (!strcmp(str, "header"))
			opt_header_field_names = 1;
		else if (!strcmp(str, "payload") || !strcmp(str, "args") || !strcmp(str, "arg"))
			opt_payload_field_names = 1;
		else if (!strcmp(str, "trace"))
			opt_trace_name = 1;
		else if (!strcmp(str, "trace:domain"))
			opt_trace_domain = 1;
		else if (!strcmp(str, "trace:procname"))
			opt_trace_procname = 1;
		else if (!strcmp(str, "trace:vpid"))
			opt_trace_vpid = 1;
		else if (!strcmp(str, "loglevel"))
			opt_loglevel = 1;
		else {
			fprintf(stdout, "[error] unknown field name type %s\n", str);
			return -EINVAL;
		}
	} while ((str = strtok_r(NULL, ",", &strctx)));
	return 0;
}

/*
 * Return 0 if caller should continue, < 0 if caller should return
 * error, > 0 if caller should exit without reporting error.
 */
static int parse_options(int argc, char **argv)
{
	poptContext pc;
	int opt, ret = 0;

	if (argc == 1) {
		usage(stdout);
		return 1;	/* exit cleanly */
	}

	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
	poptReadDefaultConfig(pc, 0);

	/* set default */
	opt_payload_field_names = 1;

	while ((opt = poptGetNextOpt(pc)) != -1) {
		switch (opt) {
		case OPT_HELP:
			usage(stdout);
			ret = 1;	/* exit cleanly */
			goto end;
		case OPT_LIST:
			list_formats(stdout);
			ret = 1;
			goto end;
		case OPT_VERBOSE:
			babeltrace_verbose = 1;
			break;
		case OPT_NAMES:
			if (get_names_args(&pc)) {
				ret = -EINVAL;
				goto end;
			}
			break;
		case OPT_DEBUG:
			babeltrace_debug = 1;
			break;
		case OPT_NO_DELTA:
			opt_delta = 0;
			break;
		default:
			ret = -EINVAL;
			goto end;
		}
	}

	opt_input_path = poptGetArg(pc);
	if (!opt_input_path) {
		ret = -EINVAL;
		goto end;
	}
	opt_output_path = poptGetArg(pc);

end:
	if (pc) {
		poptFreeContext(pc);
	}
	return ret;
}

static void init_trace_collection(struct trace_collection *tc)
{
	tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
}

/*
 * finalize_trace_collection() closes the opened traces for read
 * and free the memory allocated for trace collection
 */
static void finalize_trace_collection(struct trace_collection *tc)
{
	int i;

	for (i = 0; i < tc->array->len; i++) {
		struct trace_descriptor *temp =
			g_ptr_array_index(tc->array, i);
		fmt_read->close_trace(temp);
	}
	g_ptr_array_free(tc->array, TRUE);
}

static void trace_collection_add(struct trace_collection *tc,
				 struct trace_descriptor *td)
{
	g_ptr_array_add(tc->array, td);
}

int convert_trace(struct trace_descriptor *td_write,
		  struct bt_context *ctx)
{
	struct babeltrace_iter *iter;
	struct ctf_stream *stream;
	struct ctf_stream_event *event;
	struct ctf_text_stream_pos *sout;
	struct trace_collection_pos begin_pos;
	int ret;

	sout = container_of(td_write, struct ctf_text_stream_pos,
			trace_descriptor);

	begin_pos.type = BT_SEEK_BEGIN;
	iter = babeltrace_iter_create(ctx, &begin_pos, NULL);
	if (!iter) {
		ret = -1;
		goto error_iter;
	}
	while (babeltrace_iter_read_event(iter, &stream, &event) == 0) {
		ret = sout->parent.event_cb(&sout->parent, stream);
		if (ret) {
			fprintf(stdout, "[error] Writing event failed.\n");
			goto end;
		}
		ret = babeltrace_iter_next(iter);
		if (ret < 0)
			goto end;
	}
	ret = 0;

end:
	babeltrace_iter_destroy(iter);
error_iter:
	return ret;
}


/*
 * traverse_dir() is the callback functiion for File Tree Walk (nftw).
 * it receives the path of the current entry (file, dir, link..etc) with
 * a flag to indicate the type of the entry.
 * if the entry being visited is a directory and contains a metadata file,
 * then open it for reading and save a trace_descriptor to that directory
 * in the read trace collection.
 */
static int traverse_dir(const char *fpath, const struct stat *sb,
			int tflag, struct FTW *ftwbuf)
{
	int dirfd;
	int fd;
	struct trace_descriptor *td_read;

	if (tflag != FTW_D)
		return 0;
	dirfd = open(fpath, 0);
	if (dirfd < 0) {
		fprintf(stdout, "[error] unable to open trace "
			"directory file descriptor.\n");
		return -1;
	}
	fd = openat(dirfd, "metadata", O_RDONLY);
	if (fd < 0) {
		close(dirfd);
	} else {
		close(fd);
		close(dirfd);
		td_read = fmt_read->open_trace(opt_input_path,
				fpath, O_RDONLY, ctf_move_pos_slow,
				NULL);
		if (!td_read) {
			fprintf(stdout, "Error opening trace \"%s\" "
					"for reading.\n\n", fpath);
			return -1;	/* error */
		}
		trace_collection_add(&trace_collection_read, td_read);
	}
	return 0;	/* success */
}

int main(int argc, char **argv)
{
	int ret;
	struct format *fmt_write;
	struct trace_descriptor *td_write;
	struct bt_context *ctx;

	ret = parse_options(argc, argv);
	if (ret < 0) {
		fprintf(stdout, "Error parsing options.\n\n");
		usage(stdout);
		exit(EXIT_FAILURE);
	} else if (ret > 0) {
		exit(EXIT_SUCCESS);
	}
	printf_verbose("Verbose mode active.\n");
	printf_debug("Debug mode active.\n");

	if (opt_input_format)
		strlower(opt_input_format);
	if (opt_output_format)
		strlower(opt_output_format);

	printf_verbose("Converting from directory: %s\n", opt_input_path);
	printf_verbose("Converting from format: %s\n",
		opt_input_format ? : "ctf <default>");
	printf_verbose("Converting to directory: %s\n",
		opt_output_path ? : "<stdout>");
	printf_verbose("Converting to format: %s\n",
		opt_output_format ? : "text <default>");

	if (!opt_input_format)
		opt_input_format = "ctf";
	if (!opt_output_format)
		opt_output_format = "text";
	fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
	if (!fmt_read) {
		fprintf(stdout, "[error] Format \"%s\" is not supported.\n\n",
			opt_input_format);
		exit(EXIT_FAILURE);
	}
	fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
	if (!fmt_write) {
		fprintf(stdout, "[error] format \"%s\" is not supported.\n\n",
			opt_output_format);
		exit(EXIT_FAILURE);
	}

	/*
	 * pass the input path to nftw() .
	 * specify traverse_dir() as the callback function.
	 * depth = 10 which is the max number of file descriptors
	 * that nftw() can open at a given time.
	 * flags = 0  check nftw documentation for more info .
	 */
	init_trace_collection(&trace_collection_read);
	ret = nftw(opt_input_path, traverse_dir, 10, 0);
	if (ret != 0) {
		fprintf(stdout, "[error] opening trace \"%s\" for reading.\n\n",
			opt_input_path);
		goto error_td_read;
	}
	if (trace_collection_read.array->len == 0) {
		fprintf(stdout, "[warning] no metadata file was found."
						" no output was generated\n");
		return 0;
	}
	ctx = bt_context_create(&trace_collection_read);
	if (!ctx) {
		fprintf(stdout, "Error allocating a new context\n");
		goto error_td_read;
	}
	td_write = fmt_write->open_trace(NULL, opt_output_path, O_RDWR, NULL, NULL);
	if (!td_write) {
		fprintf(stdout, "Error opening trace \"%s\" for writing.\n\n",
			opt_output_path ? : "<none>");
		goto error_td_write;
	}

	ret = convert_trace(td_write, ctx);
	if (ret) {
		fprintf(stdout, "Error printing trace.\n\n");
		goto error_copy_trace;
	}

	fmt_write->close_trace(td_write);
	finalize_trace_collection(&trace_collection_read);
	bt_context_destroy(ctx);
	printf_verbose("finished converting. Output written to:\n%s\n",
			opt_output_path ? : "<stdout>");
	exit(EXIT_SUCCESS);

	/* Error handling */
error_copy_trace:
	fmt_write->close_trace(td_write);
error_td_write:
	finalize_trace_collection(&trace_collection_read);
error_td_read:
	exit(EXIT_FAILURE);
}
Commit	Line	Data
34ac0e6c MD	1	/*
	2	* babeltrace.c
	3	*
	4	* Babeltrace Trace Converter
	5	*
64fa3fec MD	6	* Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
	7	*
	8	* Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
34ac0e6c MD	9	*
	10	* Permission is hereby granted, free of charge, to any person obtaining a copy
	11	* of this software and associated documentation files (the "Software"), to deal
	12	* in the Software without restriction, including without limitation the rights
	13	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	14	* copies of the Software, and to permit persons to whom the Software is
	15	* furnished to do so, subject to the following conditions:
	16	*
	17	* The above copyright notice and this permission notice shall be included in
	18	* all copies or substantial portions of the Software.
	19	*/
4c8bfb7e	20
afb48eae	21	#define _XOPEN_SOURCE 700
00f7fbf0	22	#include <config.h>
95d36295	23	#include <babeltrace/babeltrace.h>
7fb21036	24	#include <babeltrace/format.h>
95d36295 JD	25	#include <babeltrace/context.h>
	26	#include <babeltrace/ctf/types.h>
	27	#include <babeltrace/ctf-text/types.h>
6204d33c	28	#include <babeltrace/iterator.h>
34ac0e6c MD	29	#include <popt.h>
	30	#include <errno.h>
	31	#include <stdlib.h>
bbefb8dd MD	32	#include <ctype.h>
	33	#include <sys/stat.h>
	34	#include <sys/types.h>
	35	#include <fcntl.h>
afb48eae AA	36	#include <ftw.h>
	37	#include <dirent.h>
	38	#include <unistd.h>
4c8bfb7e	39
afb48eae	40	#define DEFAULT_FILE_ARRAY_SIZE 1
bbefb8dd MD	41	static char *opt_input_format;
bbefb8dd MD	42	static char *opt_output_format;
34ac0e6c MD	43
	44	static const char *opt_input_path;
	45	static const char *opt_output_path;
	46
afb48eae AA	47	static struct trace_collection trace_collection_read;
	48	static struct format *fmt_read;
	49
bbefb8dd MD	50	void strlower(char *str)
	51	{
	52	while (*str) {
	53	str = tolower(str);
	54	str++;
	55	}
	56	}
	57
34ac0e6c MD	58	enum {
	59	OPT_NONE = 0,
	60	OPT_HELP,
7fb21036	61	OPT_LIST,
34ac0e6c MD	62	OPT_VERBOSE,
34ac0e6c MD	63	OPT_DEBUG,
d63ca2cd	64	OPT_NAMES,
8d8ed9af	65	OPT_NO_DELTA,
34ac0e6c MD	66	};
	67
	68	static struct poptOption long_options[] = {
	69	/* longName, shortName, argInfo, argPtr, value, descrip, argDesc */
	70	{ "input-format", 'i', POPT_ARG_STRING, &opt_input_format, OPT_NONE, NULL, NULL },
	71	{ "output-format", 'o', POPT_ARG_STRING, &opt_output_format, OPT_NONE, NULL, NULL },
	72	{ "help", 'h', POPT_ARG_NONE, NULL, OPT_HELP, NULL, NULL },
7fb21036	73	{ "list", 'l', POPT_ARG_NONE, NULL, OPT_LIST, NULL, NULL },
34ac0e6c MD	74	{ "verbose", 'v', POPT_ARG_NONE, NULL, OPT_VERBOSE, NULL, NULL },
34ac0e6c MD	75	{ "debug", 'd', POPT_ARG_NONE, NULL, OPT_DEBUG, NULL, NULL },
cba1661c	76	{ "names", 'n', POPT_ARG_STRING, NULL, OPT_NAMES, NULL, NULL },
8d8ed9af	77	{ "no-delta", 0, POPT_ARG_NONE, NULL, OPT_NO_DELTA, NULL, NULL },
34ac0e6c MD	78	{ NULL, 0, 0, NULL, 0, NULL, NULL },
	79	};
	80
7fb21036 MD	81	static void list_formats(FILE *fp)
	82	{
	83	fprintf(fp, "\n");
	84	bt_fprintf_format_list(fp);
	85	}
	86
34ac0e6c	87	static void usage(FILE *fp)
4c8bfb7e	88	{
00f7fbf0	89	fprintf(fp, "BabelTrace Trace Converter %s\n\n", VERSION);
4d5678b9	90	fprintf(fp, "usage : babeltrace [OPTIONS] INPUT <OUTPUT>\n");
34ac0e6c	91	fprintf(fp, "\n");
4d5678b9 MD	92	fprintf(fp, " INPUT Input trace path\n");
4d5678b9 MD	93	fprintf(fp, " OUTPUT Output trace path (default: stdout)\n");
34ac0e6c	94	fprintf(fp, "\n");
d2b8ea6b MD	95	fprintf(fp, " -i, --input-format FORMAT Input trace format (default: ctf)\n");
d2b8ea6b MD	96	fprintf(fp, " -o, --output-format FORMAT Output trace format (default: text)\n");
34ac0e6c	97	fprintf(fp, "\n");
4d5678b9 MD	98	fprintf(fp, " -h, --help This help message\n");
	99	fprintf(fp, " -l, --list List available formats\n");
	100	fprintf(fp, " -v, --verbose Verbose mode\n");
cba1661c	101	fprintf(fp, " (or set BABELTRACE_VERBOSE environment variable)\n");
4d5678b9	102	fprintf(fp, " -d, --debug Debug mode\n");
cba1661c	103	fprintf(fp, " (or set BABELTRACE_DEBUG environment variable)\n");
8d8ed9af	104	fprintf(fp, " --no-delta Do not print time delta between consecutive events\n");
cba1661c MD	105	fprintf(fp, " -n, --names name1<,name2,...> Print field names.\n");
cba1661c MD	106	fprintf(fp, " Available field names:\n");
82662ad4 MD	107	fprintf(fp, " (payload OR args OR arg)\n");
82662ad4 MD	108	fprintf(fp, " all, scope, header, (context OR ctx)\n");
d86d62f8 MD	109	fprintf(fp, " trace, trace:domain, trace:procname, trace:vpid,\n");
d86d62f8 MD	110	fprintf(fp, " loglevel.\n");
cba1661c	111	fprintf(fp, " (payload active by default)\n");
7fb21036	112	list_formats(fp);
34ac0e6c MD	113	fprintf(fp, "\n");
	114	}
	115
cba1661c MD	116	static int get_names_args(poptContext *pc)
	117	{
	118	char str, strlist, *strctx;
	119
	120	opt_payload_field_names = 0;
	121	strlist = (char ) poptGetOptArg(pc);
	122	if (!strlist) {
	123	return -EINVAL;
	124	}
	125	str = strtok_r(strlist, ",", &strctx);
	126	do {
	127	if (!strcmp(str, "all"))
	128	opt_all_field_names = 1;
	129	else if (!strcmp(str, "scope"))
	130	opt_scope_field_names = 1;
	131	else if (!strcmp(str, "context") \|\| !strcmp(str, "ctx"))
	132	opt_context_field_names = 1;
	133	else if (!strcmp(str, "header"))
	134	opt_header_field_names = 1;
	135	else if (!strcmp(str, "payload") \|\| !strcmp(str, "args") \|\| !strcmp(str, "arg"))
	136	opt_payload_field_names = 1;
82662ad4 MD	137	else if (!strcmp(str, "trace"))
82662ad4 MD	138	opt_trace_name = 1;
8c250d87 MD	139	else if (!strcmp(str, "trace:domain"))
	140	opt_trace_domain = 1;
	141	else if (!strcmp(str, "trace:procname"))
	142	opt_trace_procname = 1;
	143	else if (!strcmp(str, "trace:vpid"))
	144	opt_trace_vpid = 1;
d86d62f8 MD	145	else if (!strcmp(str, "loglevel"))
d86d62f8 MD	146	opt_loglevel = 1;
cba1661c MD	147	else {
	148	fprintf(stdout, "[error] unknown field name type %s\n", str);
	149	return -EINVAL;
	150	}
	151	} while ((str = strtok_r(NULL, ",", &strctx)));
	152	return 0;
	153	}
	154
34ac0e6c MD	155	/*
	156	* Return 0 if caller should continue, < 0 if caller should return
	157	* error, > 0 if caller should exit without reporting error.
	158	*/
bbefb8dd	159	static int parse_options(int argc, char **argv)
34ac0e6c MD	160	{
	161	poptContext pc;
	162	int opt, ret = 0;
	163
0f980a35 MD	164	if (argc == 1) {
	165	usage(stdout);
	166	return 1; /* exit cleanly */
	167	}
	168
bbefb8dd	169	pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 0);
34ac0e6c MD	170	poptReadDefaultConfig(pc, 0);
34ac0e6c MD	171
cba1661c MD	172	/* set default */
	173	opt_payload_field_names = 1;
	174
34ac0e6c MD	175	while ((opt = poptGetNextOpt(pc)) != -1) {
	176	switch (opt) {
	177	case OPT_HELP:
7fb21036	178	usage(stdout);
34ac0e6c MD	179	ret = 1; /* exit cleanly */
34ac0e6c MD	180	goto end;
7fb21036 MD	181	case OPT_LIST:
	182	list_formats(stdout);
	183	ret = 1;
	184	goto end;
34ac0e6c MD	185	case OPT_VERBOSE:
	186	babeltrace_verbose = 1;
	187	break;
cba1661c MD	188	case OPT_NAMES:
	189	if (get_names_args(&pc)) {
	190	ret = -EINVAL;
	191	goto end;
	192	}
	193	break;
34ac0e6c MD	194	case OPT_DEBUG:
	195	babeltrace_debug = 1;
	196	break;
8d8ed9af MD	197	case OPT_NO_DELTA:
	198	opt_delta = 0;
	199	break;
34ac0e6c MD	200	default:
	201	ret = -EINVAL;
	202	goto end;
	203	}
	204	}
	205
	206	opt_input_path = poptGetArg(pc);
	207	if (!opt_input_path) {
	208	ret = -EINVAL;
	209	goto end;
	210	}
	211	opt_output_path = poptGetArg(pc);
cba1661c	212
34ac0e6c MD	213	end:
	214	if (pc) {
	215	poptFreeContext(pc);
	216	}
	217	return ret;
	218	}
	219
afb48eae AA	220	static void init_trace_collection(struct trace_collection *tc)
	221	{
	222	tc->array = g_ptr_array_sized_new(DEFAULT_FILE_ARRAY_SIZE);
	223	}
	224
	225	/*
	226	* finalize_trace_collection() closes the opened traces for read
	227	* and free the memory allocated for trace collection
	228	*/
	229	static void finalize_trace_collection(struct trace_collection *tc)
	230	{
	231	int i;
	232
	233	for (i = 0; i < tc->array->len; i++) {
	234	struct trace_descriptor *temp =
	235	g_ptr_array_index(tc->array, i);
	236	fmt_read->close_trace(temp);
	237	}
	238	g_ptr_array_free(tc->array, TRUE);
	239	}
	240
	241	static void trace_collection_add(struct trace_collection *tc,
	242	struct trace_descriptor *td)
	243	{
	244	g_ptr_array_add(tc->array, td);
	245	}
	246
95d36295 JD	247	int convert_trace(struct trace_descriptor *td_write,
	248	struct bt_context *ctx)
	249	{
	250	struct babeltrace_iter *iter;
	251	struct ctf_stream *stream;
	252	struct ctf_stream_event *event;
	253	struct ctf_text_stream_pos *sout;
	254	struct trace_collection_pos begin_pos;
	255	int ret;
	256
	257	sout = container_of(td_write, struct ctf_text_stream_pos,
	258	trace_descriptor);
	259
	260	begin_pos.type = BT_SEEK_BEGIN;
	261	iter = babeltrace_iter_create(ctx, &begin_pos, NULL);
	262	if (!iter) {
	263	ret = -1;
	264	goto error_iter;
	265	}
	266	while (babeltrace_iter_read_event(iter, &stream, &event) == 0) {
	267	ret = sout->parent.event_cb(&sout->parent, stream);
	268	if (ret) {
	269	fprintf(stdout, "[error] Writing event failed.\n");
	270	goto end;
	271	}
	272	ret = babeltrace_iter_next(iter);
	273	if (ret < 0)
	274	goto end;
	275	}
	276	ret = 0;
	277
	278	end:
	279	babeltrace_iter_destroy(iter);
	280	error_iter:
	281	return ret;
	282	}
	283
	284
afb48eae AA	285	/*
	286	* traverse_dir() is the callback functiion for File Tree Walk (nftw).
	287	* it receives the path of the current entry (file, dir, link..etc) with
	288	* a flag to indicate the type of the entry.
	289	* if the entry being visited is a directory and contains a metadata file,
	290	* then open it for reading and save a trace_descriptor to that directory
	291	* in the read trace collection.
	292	*/
	293	static int traverse_dir(const char fpath, const struct stat sb,
	294	int tflag, struct FTW *ftwbuf)
	295	{
	296	int dirfd;
	297	int fd;
	298	struct trace_descriptor *td_read;
	299
	300	if (tflag != FTW_D)
	301	return 0;
	302	dirfd = open(fpath, 0);
	303	if (dirfd < 0) {
	304	fprintf(stdout, "[error] unable to open trace "
	305	"directory file descriptor.\n");
	306	return -1;
	307	}
	308	fd = openat(dirfd, "metadata", O_RDONLY);
	309	if (fd < 0) {
	310	close(dirfd);
	311	} else {
	312	close(fd);
	313	close(dirfd);
8c250d87 MD	314	td_read = fmt_read->open_trace(opt_input_path,
8c250d87 MD	315	fpath, O_RDONLY, ctf_move_pos_slow,
ae23d232	316	NULL);
afb48eae AA	317	if (!td_read) {
	318	fprintf(stdout, "Error opening trace \"%s\" "
	319	"for reading.\n\n", fpath);
	320	return -1; /* error */
	321	}
	322	trace_collection_add(&trace_collection_read, td_read);
	323	}
	324	return 0; /* success */
	325	}
	326
bbefb8dd	327	int main(int argc, char **argv)
34ac0e6c MD	328	{
34ac0e6c MD	329	int ret;
afb48eae AA	330	struct format *fmt_write;
afb48eae AA	331	struct trace_descriptor *td_write;
95d36295	332	struct bt_context *ctx;
34ac0e6c MD	333
	334	ret = parse_options(argc, argv);
	335	if (ret < 0) {
bbefb8dd	336	fprintf(stdout, "Error parsing options.\n\n");
34ac0e6c MD	337	usage(stdout);
	338	exit(EXIT_FAILURE);
	339	} else if (ret > 0) {
	340	exit(EXIT_SUCCESS);
	341	}
	342	printf_verbose("Verbose mode active.\n");
	343	printf_debug("Debug mode active.\n");
	344
bbefb8dd MD	345	if (opt_input_format)
	346	strlower(opt_input_format);
	347	if (opt_output_format)
	348	strlower(opt_output_format);
	349
afb48eae	350	printf_verbose("Converting from directory: %s\n", opt_input_path);
34ac0e6c	351	printf_verbose("Converting from format: %s\n",
b61922b5	352	opt_input_format ? : "ctf <default>");
afb48eae	353	printf_verbose("Converting to directory: %s\n",
478b6389	354	opt_output_path ? : "<stdout>");
34ac0e6c	355	printf_verbose("Converting to format: %s\n",
b61922b5	356	opt_output_format ? : "text <default>");
bbefb8dd	357
b61922b5 MD	358	if (!opt_input_format)
	359	opt_input_format = "ctf";
	360	if (!opt_output_format)
	361	opt_output_format = "text";
bbefb8dd MD	362	fmt_read = bt_lookup_format(g_quark_from_static_string(opt_input_format));
bbefb8dd MD	363	if (!fmt_read) {
c8b219a3	364	fprintf(stdout, "[error] Format \"%s\" is not supported.\n\n",
bbefb8dd MD	365	opt_input_format);
	366	exit(EXIT_FAILURE);
	367	}
bbefb8dd MD	368	fmt_write = bt_lookup_format(g_quark_from_static_string(opt_output_format));
bbefb8dd MD	369	if (!fmt_write) {
c8b219a3	370	fprintf(stdout, "[error] format \"%s\" is not supported.\n\n",
bbefb8dd MD	371	opt_output_format);
	372	exit(EXIT_FAILURE);
	373	}
	374
afb48eae AA	375	/*
	376	* pass the input path to nftw() .
	377	* specify traverse_dir() as the callback function.
	378	* depth = 10 which is the max number of file descriptors
	379	* that nftw() can open at a given time.
	380	* flags = 0 check nftw documentation for more info .
	381	*/
	382	init_trace_collection(&trace_collection_read);
	383	ret = nftw(opt_input_path, traverse_dir, 10, 0);
	384	if (ret != 0) {
c8b219a3	385	fprintf(stdout, "[error] opening trace \"%s\" for reading.\n\n",
bbefb8dd MD	386	opt_input_path);
	387	goto error_td_read;
	388	}
afb48eae AA	389	if (trace_collection_read.array->len == 0) {
	390	fprintf(stdout, "[warning] no metadata file was found."
	391	" no output was generated\n");
	392	return 0;
	393	}
95d36295 JD	394	ctx = bt_context_create(&trace_collection_read);
	395	if (!ctx) {
	396	fprintf(stdout, "Error allocating a new context\n");
	397	goto error_td_read;
	398	}
8c250d87	399	td_write = fmt_write->open_trace(NULL, opt_output_path, O_RDWR, NULL, NULL);
bbefb8dd MD	400	if (!td_write) {
bbefb8dd MD	401	fprintf(stdout, "Error opening trace \"%s\" for writing.\n\n",
b61922b5	402	opt_output_path ? : "<none>");
bbefb8dd MD	403	goto error_td_write;
bbefb8dd MD	404	}
847bf71a	405
95d36295	406	ret = convert_trace(td_write, ctx);
46322b33 MD	407	if (ret) {
	408	fprintf(stdout, "Error printing trace.\n\n");
	409	goto error_copy_trace;
	410	}
847bf71a	411
bbefb8dd	412	fmt_write->close_trace(td_write);
afb48eae	413	finalize_trace_collection(&trace_collection_read);
95d36295	414	bt_context_destroy(ctx);
afb48eae AA	415	printf_verbose("finished converting. Output written to:\n%s\n",
afb48eae AA	416	opt_output_path ? : "<stdout>");
bbefb8dd	417	exit(EXIT_SUCCESS);
34ac0e6c	418
bbefb8dd	419	/* Error handling */
46322b33	420	error_copy_trace:
bbefb8dd MD	421	fmt_write->close_trace(td_write);
bbefb8dd MD	422	error_td_write:
afb48eae	423	finalize_trace_collection(&trace_collection_read);
bbefb8dd MD	424	error_td_read:
bbefb8dd MD	425	exit(EXIT_FAILURE);
4c8bfb7e	426	}