[lttv.git] / ltt-control / lttctl / lttctl.c

/* lttctl
 *
 * Linux Trace Toolkit Control
 *
 * Small program that controls LTT through libltt.
 *
 * Copyright 2005 -
 * 	Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <liblttctl/lttctl.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>
#include <signal.h>
#include <dirent.h>
#include <string.h>
#include <sys/stat.h>

/* Buffer for file copy : 4k seems optimal. */
#define BUF_SIZE 4096

enum trace_ctl_op {
  CTL_OP_CREATE_START,
	CTL_OP_CREATE,
	CTL_OP_DESTROY,
  CTL_OP_STOP_DESTROY,
	CTL_OP_START,
	CTL_OP_STOP,
	CTL_OP_DAEMON,
	CTL_OP_DESCRIPTION,
	CTL_OP_NONE
};

static char *trace_name = NULL;
static char *mode_name = NULL;
static unsigned subbuf_size = 0;
static unsigned n_subbufs = 0;
static unsigned append_trace = 0;
static enum trace_mode mode = LTT_TRACE_NORMAL;
static enum trace_ctl_op op = CTL_OP_NONE;
static char *channel_root = NULL;
static char *trace_root = NULL;
static char *num_threads = "1";

static int sigchld_received = 0;

void sigchld_handler(int signo)
{
	printf("signal %d received\n", signo);
	sigchld_received = 1;
}


/* Args :
 *
 */
void show_arguments(void)
{
	printf("Please use the following arguments :\n");
	printf("\n");
	printf("-n name       Name of the trace.\n");
	printf("-b            Create trace channels and start tracing (no daemon).\n");
	printf("-c            Create trace channels.\n");
	printf("-m mode       Normal or flight recorder mode.\n");
	printf("              Mode values : normal (default) or flight.\n");
	printf("-r            Destroy trace channels.\n");
	printf("-R            Stop tracing and destroy trace channels.\n");
	printf("-s            Start tracing.\n");
	//printf("              Note : will automatically create a normal trace if "
	//											"none exists.\n");
	printf("-q            Stop tracing.\n");
	printf("-d            Create trace, spawn a lttd daemon, start tracing.\n");
	printf("              (optionnaly, you can set LTT_DAEMON\n");
	printf("              and the LTT_FACILITIES env. vars.)\n");
	printf("-t            Trace root path. (ex. /root/traces/example_trace)\n");
	printf("-l            LTT channels root path. (ex. /mnt/relayfs/ltt)\n");
	printf("-z            Size of the subbuffers (will be rounded to next page size)\n");
	printf("-x            Number of subbuffers\n");
	printf("-e            Get XML facilities description\n");
	printf("-a            Append to trace\n");
	printf("-N            Number of lttd threads\n");
	printf("\n");
}


/* parse_arguments
 *
 * Parses the command line arguments.
 *
 * Returns -1 if the arguments were correct, but doesn't ask for program
 * continuation. Returns EINVAL if the arguments are incorrect, or 0 if OK.
 */
int parse_arguments(int argc, char **argv)
{
	int ret = 0;
	int argn = 1;
	
	if(argc == 2) {
		if(strcmp(argv[1], "-h") == 0) {
			return -1;
		}
	}

	while(argn < argc) {

		switch(argv[argn][0]) {
			case '-':
				switch(argv[argn][1]) {
					case 'n':
						if(argn+1 < argc) {
							trace_name = argv[argn+1];
							argn++;
						} else {
							printf("Specify a trace name after -n.\n");
							printf("\n");
							ret = EINVAL;
						}

						break;
          case 'b':
            op = CTL_OP_CREATE_START;
						break;
					case 'c':
						op = CTL_OP_CREATE;
            break;
					case 'm':
						if(argn+1 < argc) {
							mode_name = argv[argn+1];
							argn++;
							if(strcmp(mode_name, "normal") == 0)
								mode = LTT_TRACE_NORMAL;
							else if(strcmp(mode_name, "flight") == 0)
								mode = LTT_TRACE_FLIGHT;
							else {
								printf("Invalid mode '%s'.\n", argv[argn]);
								printf("\n");
								ret = EINVAL;
							}
						} else {
								printf("Specify a mode after -m.\n");
								printf("\n");
								ret = EINVAL;
						}
						break;
					case 'r':
						op = CTL_OP_DESTROY;
						break;
					case 'R':
						op = CTL_OP_STOP_DESTROY;
						break;
					case 's':
						op = CTL_OP_START;
						break;
					case 'q':
						op = CTL_OP_STOP;
						break;
					case 'z':
						if(argn+1 < argc) {
							subbuf_size = (unsigned)atoi(argv[argn+1]);
							argn++;
						} else {
							printf("Specify a number of subbuffers after -z.\n");
							printf("\n");
							ret = EINVAL;
						}
						break;
					case 'x':
						if(argn+1 < argc) {
							n_subbufs = (unsigned)atoi(argv[argn+1]);
							argn++;
						} else {
							printf("Specify a subbuffer size after -x.\n");
							printf("\n");
							ret = EINVAL;
						}
						break;
					case 'd':
						op = CTL_OP_DAEMON;
						break;
          case 'e':
            op = CTL_OP_DESCRIPTION;
            break;
					case 't':
						if(argn+1 < argc) {
							trace_root = argv[argn+1];
							argn++;
						} else {
							printf("Specify a trace root path after -t.\n");
							printf("\n");
							ret = EINVAL;
						}
						break;
					case 'l':
						if(argn+1 < argc) {
							channel_root = argv[argn+1];
							argn++;
						} else {
							printf("Specify a channel root path after -l.\n");
							printf("\n");
							ret = EINVAL;
						}
						break;
          case 'a':
            append_trace = 1;
            break;
          case 'N':
						if(argn+1 < argc) {
							num_threads = argv[argn+1];
							argn++;
						}
						break;
					default:
						printf("Invalid argument '%s'.\n", argv[argn]);
						printf("\n");
						ret = EINVAL;
				}
				break;
			default:
				printf("Invalid argument '%s'.\n", argv[argn]);
				printf("\n");
				ret = EINVAL;
		}
		argn++;
	}
	
	if(op != CTL_OP_DESCRIPTION && trace_name == NULL) {
		printf("Please specify a trace name.\n");
		printf("\n");
		ret = EINVAL;
	}

	if(op == CTL_OP_NONE) {
		printf("Please specify an operation.\n");
		printf("\n");
		ret = EINVAL;
	}

	if(op == CTL_OP_DAEMON) {
		if(trace_root == NULL) {
			printf("Please specify -t trace_root_path with the -d option.\n");
			printf("\n");
			ret = EINVAL;
		}
		if(channel_root == NULL) {
			printf("Please specify -l ltt_root_path with the -d option.\n");
			printf("\n");
			ret = EINVAL;
		}
	}

  if(op == CTL_OP_DESCRIPTION) {
    if(trace_root == NULL) {
			printf("Please specify -t trace_root_path with the -e option.\n");
			printf("\n");
			ret = EINVAL;
    }
  }

	return ret;
}

void show_info(void)
{
	printf("Linux Trace Toolkit Trace Control\n");
	printf("\n");
  if(trace_name != NULL) {
  	printf("Controlling trace : %s\n", trace_name);
  	printf("\n");
  }
}

int create_eventdefs(void)
{
  int ret = 0;
  char eventdefs_path[PATH_MAX];
  char eventdefs_file[PATH_MAX];
  char facilities_file[PATH_MAX];
  char read_buf[BUF_SIZE];
  struct dirent *entry;
	char *facilities_path = getenv("LTT_FACILITIES");
	if(facilities_path == NULL) facilities_path =
          PACKAGE_DATA_DIR "/" PACKAGE "/facilities";

  ret = mkdir(trace_root, S_IRWXU|S_IRWXG|S_IRWXO);
  if(ret == -1 && errno != EEXIST) {
    ret = errno;
    perror("Cannot create trace_root directory");
    printf("trace_root is %s\n", trace_root);
    goto error;
  }
  ret = 0;
  
  size_t trace_root_len = strlen(trace_root);
  strncpy(eventdefs_path, trace_root, PATH_MAX);
  strncat(eventdefs_path, "/eventdefs/", PATH_MAX - trace_root_len);
  size_t eventdefs_path_len = strlen(eventdefs_path);
  ret = mkdir(eventdefs_path, S_IRWXU|S_IRWXG|S_IRWXO);
  if(ret == -1 && (!append_trace || errno != EEXIST)) {
    ret = errno;
    perror("Cannot create eventdefs directory");
    goto error;
  }
  ret = 0;
  
  DIR *facilities_dir = opendir(facilities_path);
  
  if(facilities_dir == NULL) {
    perror("Cannot open facilities directory");
    ret = EEXIST;
    goto error;
  }

  while((entry = readdir(facilities_dir)) != NULL) {
    if(entry->d_name[0] == '.') continue;
    
    printf("Appending facility file %s\n", entry->d_name);
    strncpy(eventdefs_file, eventdefs_path, PATH_MAX);
    strncat(eventdefs_file, entry->d_name, PATH_MAX - eventdefs_path_len);
    /* Append to the file */
    FILE *dest = fopen(eventdefs_file, "a");
    if(!dest) {
      perror("Cannot create eventdefs file");
      continue;
    }
    strncpy(facilities_file, facilities_path, PATH_MAX);
    size_t facilities_dir_len = strlen(facilities_path);
    strncat(facilities_file, "/", PATH_MAX - facilities_dir_len);
    strncat(facilities_file, entry->d_name, PATH_MAX - facilities_dir_len-1);
    FILE *src = fopen(facilities_file, "r");
    if(!src) {
      ret = errno;
      perror("Cannot open eventdefs file for reading");
      goto close_dest;
    }

    do {
      size_t read_size, write_size;
      read_size = fread(read_buf, sizeof(char), BUF_SIZE, src);
      if(ferror(src)) {
        ret = errno;
        perror("Cannot read eventdefs file");
        goto close_src;
      }
      write_size = fwrite(read_buf, sizeof(char), read_size, dest);
      if(ferror(dest)) {
        ret = errno;
        perror("Cannot write eventdefs file");
        goto close_src;
      }
    } while(!feof(src));

    /* Add spacing between facilities */
    fwrite("\n", 1, 1, dest);
    
close_src:
    fclose(src);
close_dest:
    fclose(dest);
  }

  closedir(facilities_dir);

error:
  return ret;

}


int lttctl_daemon(struct lttctl_handle *handle, char *trace_name)
{
	char channel_path[PATH_MAX] = "";
	pid_t pid;
	int ret;
	char *lttd_path = getenv("LTT_DAEMON");
	struct sigaction act;

	if(lttd_path == NULL) lttd_path = 
    PACKAGE_BIN_DIR "/lttd";
	
	strcat(channel_path, channel_root);
	strcat(channel_path, "/");
	strcat(channel_path, trace_name);

	
	ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size, n_subbufs);
	if(ret != 0) goto create_error;

	act.sa_handler = sigchld_handler;
	sigemptyset(&(act.sa_mask));
	sigaddset(&(act.sa_mask), SIGCHLD);
	sigaction(SIGCHLD, &act, NULL);
	
	pid = fork();

	if(pid > 0) {
    int status;
		/* parent */
		while(!(sigchld_received)) pause();

    waitpid(pid, &status, 0);
    ret = 0;
    if(WIFEXITED(status))
      ret = WEXITSTATUS(status);
    if(ret) goto start_error;

		printf("Creating supplementary trace files\n");
    ret = create_eventdefs();
    if(ret) goto start_error;

	} else if(pid == 0) {
		/* child */
    int ret;
    if(append_trace) 
  		ret =	execlp(lttd_path, lttd_path, "-t", trace_root, "-c",
                       channel_path, "-d", "-a", "-N", num_threads, NULL);
    else
  		ret =	execlp(lttd_path, lttd_path, "-t", trace_root, "-c",
                       channel_path, "-d", "-N", num_threads, NULL);
		if(ret) {
      ret = errno;
			perror("Error in executing the lttd daemon");
			exit(ret);
		}
	} else {
		/* error */
		perror("Error in forking for lttd daemon");
	}

	ret = lttctl_start(handle, trace_name);
	if(ret != 0) goto start_error;

	return 0;

	/* error handling */
start_error:
  printf("Trace start error\n");
	ret |= lttctl_destroy_trace(handle, trace_name);
create_error:
	return ret;
}

int main(int argc, char ** argv)
{
	int ret;
	struct lttctl_handle *handle;
	
	ret = parse_arguments(argc, argv);

	if(ret != 0) show_arguments();
	if(ret == EINVAL) return EINVAL;
	if(ret == -1) return 0;

	show_info();
	
	handle = lttctl_create_handle();
	
	if(handle == NULL) return -1;
	
	switch(op) {
    case CTL_OP_CREATE_START:
			ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size,
																n_subbufs);
      if(!ret)
        ret = lttctl_start(handle, trace_name);
      break;
  	case CTL_OP_CREATE:
			ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size,
																n_subbufs);
      break;
		case CTL_OP_DESTROY:
			ret = lttctl_destroy_trace(handle, trace_name);
			break;
		case CTL_OP_STOP_DESTROY:
			ret = lttctl_stop(handle, trace_name);
      if(!ret)
  			ret = lttctl_destroy_trace(handle, trace_name);
			break;
		case CTL_OP_START:
			ret = lttctl_start(handle, trace_name);
			break;
		case CTL_OP_STOP:
			ret = lttctl_stop(handle, trace_name);
			break;
		case CTL_OP_DAEMON:
			ret = lttctl_daemon(handle, trace_name);
			break;
    case CTL_OP_DESCRIPTION:
      ret = create_eventdefs();
      break;
		case CTL_OP_NONE:
			break;
	}

	ret |= lttctl_destroy_handle(handle);
	
	return ret;
}
Commit	Line	Data
2cdb6fcb	1	/* lttctl
	2	*
	3	* Linux Trace Toolkit Control
	4	*
	5	* Small program that controls LTT through libltt.
	6	*
	7	* Copyright 2005 -
	8	* Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
	9	*/
	10
4e4d11b3	11	#ifdef HAVE_CONFIG_H
	12	#include <config.h>
	13	#endif
	14
5cec0a15	15	#include <liblttctl/lttctl.h>
5adba60f	16	#include <errno.h>
	17	#include <stdio.h>
	18	#include <stdlib.h>
	19	#include <sys/types.h>
86a65fdb	20	#include <sys/wait.h>
5adba60f	21	#include <unistd.h>
5adba60f	22	#include <signal.h>
d5fbdb60	23	#include <dirent.h>
	24	#include <string.h>
	25	#include <sys/stat.h>
	26
	27	/* Buffer for file copy : 4k seems optimal. */
2312de30	28	#define BUF_SIZE 4096
2cdb6fcb	29
5adba60f	30	enum trace_ctl_op {
b7f08766	31	CTL_OP_CREATE_START,
5adba60f	32	CTL_OP_CREATE,
5adba60f	33	CTL_OP_DESTROY,
b7f08766	34	CTL_OP_STOP_DESTROY,
5adba60f	35	CTL_OP_START,
	36	CTL_OP_STOP,
	37	CTL_OP_DAEMON,
129fd24a	38	CTL_OP_DESCRIPTION,
5adba60f	39	CTL_OP_NONE
5adba60f	40	};
2cdb6fcb	41
5adba60f	42	static char *trace_name = NULL;
5adba60f	43	static char *mode_name = NULL;
988614ed	44	static unsigned subbuf_size = 0;
988614ed	45	static unsigned n_subbufs = 0;
45653836	46	static unsigned append_trace = 0;
5adba60f	47	static enum trace_mode mode = LTT_TRACE_NORMAL;
	48	static enum trace_ctl_op op = CTL_OP_NONE;
	49	static char *channel_root = NULL;
	50	static char *trace_root = NULL;
22acb617	51	static char *num_threads = "1";
5adba60f	52
86a65fdb	53	static int sigchld_received = 0;
ada84671	54
86a65fdb	55	void sigchld_handler(int signo)
5adba60f	56	{
5adba60f	57	printf("signal %d received\n", signo);
86a65fdb	58	sigchld_received = 1;
5adba60f	59	}
	60
	61
	62	/* Args :
	63	*
	64	*/
	65	void show_arguments(void)
	66	{
	67	printf("Please use the following arguments :\n");
	68	printf("\n");
	69	printf("-n name Name of the trace.\n");
b7f08766	70	printf("-b Create trace channels and start tracing (no daemon).\n");
bc0fcb31	71	printf("-c Create trace channels.\n");
bc0fcb31	72	printf("-m mode Normal or flight recorder mode.\n");
5adba60f	73	printf(" Mode values : normal (default) or flight.\n");
5adba60f	74	printf("-r Destroy trace channels.\n");
b7f08766	75	printf("-R Stop tracing and destroy trace channels.\n");
5adba60f	76	printf("-s Start tracing.\n");
	77	//printf(" Note : will automatically create a normal trace if "
	78	// "none exists.\n");
	79	printf("-q Stop tracing.\n");
	80	printf("-d Create trace, spawn a lttd daemon, start tracing.\n");
d5fbdb60	81	printf(" (optionnaly, you can set LTT_DAEMON\n");
d5fbdb60	82	printf(" and the LTT_FACILITIES env. vars.)\n");
5adba60f	83	printf("-t Trace root path. (ex. /root/traces/example_trace)\n");
5adba60f	84	printf("-l LTT channels root path. (ex. /mnt/relayfs/ltt)\n");
4085af66	85	printf("-z Size of the subbuffers (will be rounded to next page size)\n");
988614ed	86	printf("-x Number of subbuffers\n");
129fd24a	87	printf("-e Get XML facilities description\n");
45653836	88	printf("-a Append to trace\n");
b8d28629	89	printf("-N Number of lttd threads\n");
5adba60f	90	printf("\n");
	91	}
	92
	93
	94	/* parse_arguments
	95	*
	96	* Parses the command line arguments.
	97	*
2baf08e5	98	* Returns -1 if the arguments were correct, but doesn't ask for program
2baf08e5	99	* continuation. Returns EINVAL if the arguments are incorrect, or 0 if OK.
5adba60f	100	*/
	101	int parse_arguments(int argc, char **argv)
	102	{
	103	int ret = 0;
	104	int argn = 1;
	105
	106	if(argc == 2) {
	107	if(strcmp(argv[1], "-h") == 0) {
2baf08e5	108	return -1;
5adba60f	109	}
	110	}
	111
	112	while(argn < argc) {
	113
	114	switch(argv[argn][0]) {
	115	case '-':
	116	switch(argv[argn][1]) {
	117	case 'n':
	118	if(argn+1 < argc) {
	119	trace_name = argv[argn+1];
	120	argn++;
	121	} else {
8eab4866	122	printf("Specify a trace name after -n.\n");
5adba60f	123	printf("\n");
2baf08e5	124	ret = EINVAL;
5adba60f	125	}
	126
	127	break;
b7f08766	128	case 'b':
b7f08766	129	op = CTL_OP_CREATE_START;
cd39bb61	130	break;
5adba60f	131	case 'c':
5adba60f	132	op = CTL_OP_CREATE;
bc0fcb31	133	break;
bc0fcb31	134	case 'm':
5adba60f	135	if(argn+1 < argc) {
	136	mode_name = argv[argn+1];
	137	argn++;
	138	if(strcmp(mode_name, "normal") == 0)
	139	mode = LTT_TRACE_NORMAL;
	140	else if(strcmp(mode_name, "flight") == 0)
	141	mode = LTT_TRACE_FLIGHT;
	142	else {
	143	printf("Invalid mode '%s'.\n", argv[argn]);
	144	printf("\n");
2baf08e5	145	ret = EINVAL;
5adba60f	146	}
5adba60f	147	} else {
bc0fcb31	148	printf("Specify a mode after -m.\n");
5adba60f	149	printf("\n");
2baf08e5	150	ret = EINVAL;
5adba60f	151	}
	152	break;
	153	case 'r':
	154	op = CTL_OP_DESTROY;
	155	break;
b7f08766	156	case 'R':
	157	op = CTL_OP_STOP_DESTROY;
	158	break;
5adba60f	159	case 's':
	160	op = CTL_OP_START;
	161	break;
	162	case 'q':
	163	op = CTL_OP_STOP;
	164	break;
988614ed	165	case 'z':
	166	if(argn+1 < argc) {
	167	subbuf_size = (unsigned)atoi(argv[argn+1]);
	168	argn++;
	169	} else {
	170	printf("Specify a number of subbuffers after -z.\n");
	171	printf("\n");
2baf08e5	172	ret = EINVAL;
988614ed	173	}
	174	break;
	175	case 'x':
	176	if(argn+1 < argc) {
	177	n_subbufs = (unsigned)atoi(argv[argn+1]);
	178	argn++;
	179	} else {
	180	printf("Specify a subbuffer size after -x.\n");
	181	printf("\n");
2baf08e5	182	ret = EINVAL;
988614ed	183	}
988614ed	184	break;
5adba60f	185	case 'd':
	186	op = CTL_OP_DAEMON;
	187	break;
129fd24a	188	case 'e':
	189	op = CTL_OP_DESCRIPTION;
	190	break;
5adba60f	191	case 't':
	192	if(argn+1 < argc) {
	193	trace_root = argv[argn+1];
	194	argn++;
	195	} else {
988614ed	196	printf("Specify a trace root path after -t.\n");
5adba60f	197	printf("\n");
2baf08e5	198	ret = EINVAL;
5adba60f	199	}
	200	break;
	201	case 'l':
	202	if(argn+1 < argc) {
	203	channel_root = argv[argn+1];
	204	argn++;
	205	} else {
988614ed	206	printf("Specify a channel root path after -l.\n");
5adba60f	207	printf("\n");
2baf08e5	208	ret = EINVAL;
5adba60f	209	}
5adba60f	210	break;
45653836	211	case 'a':
	212	append_trace = 1;
	213	break;
22acb617	214	case 'N':
	215	if(argn+1 < argc) {
	216	num_threads = argv[argn+1];
	217	argn++;
	218	}
	219	break;
5adba60f	220	default:
	221	printf("Invalid argument '%s'.\n", argv[argn]);
	222	printf("\n");
2baf08e5	223	ret = EINVAL;
5adba60f	224	}
	225	break;
	226	default:
	227	printf("Invalid argument '%s'.\n", argv[argn]);
	228	printf("\n");
2baf08e5	229	ret = EINVAL;
5adba60f	230	}
	231	argn++;
	232	}
	233
129fd24a	234	if(op != CTL_OP_DESCRIPTION && trace_name == NULL) {
5adba60f	235	printf("Please specify a trace name.\n");
5adba60f	236	printf("\n");
2baf08e5	237	ret = EINVAL;
5adba60f	238	}
	239
	240	if(op == CTL_OP_NONE) {
	241	printf("Please specify an operation.\n");
	242	printf("\n");
2baf08e5	243	ret = EINVAL;
5adba60f	244	}
	245
	246	if(op == CTL_OP_DAEMON) {
	247	if(trace_root == NULL) {
	248	printf("Please specify -t trace_root_path with the -d option.\n");
	249	printf("\n");
2baf08e5	250	ret = EINVAL;
5adba60f	251	}
	252	if(channel_root == NULL) {
	253	printf("Please specify -l ltt_root_path with the -d option.\n");
	254	printf("\n");
2baf08e5	255	ret = EINVAL;
5adba60f	256	}
	257	}
	258
129fd24a	259	if(op == CTL_OP_DESCRIPTION) {
	260	if(trace_root == NULL) {
	261	printf("Please specify -t trace_root_path with the -e option.\n");
	262	printf("\n");
2baf08e5	263	ret = EINVAL;
129fd24a	264	}
	265	}
	266
5adba60f	267	return ret;
	268	}
	269
	270	void show_info(void)
	271	{
	272	printf("Linux Trace Toolkit Trace Control\n");
	273	printf("\n");
129fd24a	274	if(trace_name != NULL) {
	275	printf("Controlling trace : %s\n", trace_name);
	276	printf("\n");
	277	}
	278	}
	279
	280	int create_eventdefs(void)
	281	{
	282	int ret = 0;
	283	char eventdefs_path[PATH_MAX];
	284	char eventdefs_file[PATH_MAX];
	285	char facilities_file[PATH_MAX];
	286	char read_buf[BUF_SIZE];
	287	struct dirent *entry;
	288	char *facilities_path = getenv("LTT_FACILITIES");
	289	if(facilities_path == NULL) facilities_path =
86a65fdb	290	PACKAGE_DATA_DIR "/" PACKAGE "/facilities";
129fd24a	291
	292	ret = mkdir(trace_root, S_IRWXU\|S_IRWXG\|S_IRWXO);
	293	if(ret == -1 && errno != EEXIST) {
618fbcc1	294	ret = errno;
129fd24a	295	perror("Cannot create trace_root directory");
	296	printf("trace_root is %s\n", trace_root);
	297	goto error;
	298	}
bd55296c	299	ret = 0;
129fd24a	300
	301	size_t trace_root_len = strlen(trace_root);
	302	strncpy(eventdefs_path, trace_root, PATH_MAX);
	303	strncat(eventdefs_path, "/eventdefs/", PATH_MAX - trace_root_len);
	304	size_t eventdefs_path_len = strlen(eventdefs_path);
	305	ret = mkdir(eventdefs_path, S_IRWXU\|S_IRWXG\|S_IRWXO);
45653836	306	if(ret == -1 && (!append_trace \|\| errno != EEXIST)) {
2baf08e5	307	ret = errno;
618fbcc1	308	perror("Cannot create eventdefs directory");
129fd24a	309	goto error;
129fd24a	310	}
bd55296c	311	ret = 0;
129fd24a	312
	313	DIR *facilities_dir = opendir(facilities_path);
	314
86a65fdb	315	if(facilities_dir == NULL) {
86a65fdb	316	perror("Cannot open facilities directory");
2baf08e5	317	ret = EEXIST;
86a65fdb	318	goto error;
	319	}
	320
129fd24a	321	while((entry = readdir(facilities_dir)) != NULL) {
	322	if(entry->d_name[0] == '.') continue;
	323
	324	printf("Appending facility file %s\n", entry->d_name);
	325	strncpy(eventdefs_file, eventdefs_path, PATH_MAX);
	326	strncat(eventdefs_file, entry->d_name, PATH_MAX - eventdefs_path_len);
	327	/* Append to the file */
	328	FILE *dest = fopen(eventdefs_file, "a");
	329	if(!dest) {
	330	perror("Cannot create eventdefs file");
	331	continue;
	332	}
	333	strncpy(facilities_file, facilities_path, PATH_MAX);
	334	size_t facilities_dir_len = strlen(facilities_path);
	335	strncat(facilities_file, "/", PATH_MAX - facilities_dir_len);
	336	strncat(facilities_file, entry->d_name, PATH_MAX - facilities_dir_len-1);
	337	FILE *src = fopen(facilities_file, "r");
	338	if(!src) {
2baf08e5	339	ret = errno;
618fbcc1	340	perror("Cannot open eventdefs file for reading");
129fd24a	341	goto close_dest;
	342	}
	343
	344	do {
	345	size_t read_size, write_size;
	346	read_size = fread(read_buf, sizeof(char), BUF_SIZE, src);
	347	if(ferror(src)) {
2baf08e5	348	ret = errno;
618fbcc1	349	perror("Cannot read eventdefs file");
129fd24a	350	goto close_src;
	351	}
	352	write_size = fwrite(read_buf, sizeof(char), read_size, dest);
	353	if(ferror(dest)) {
2baf08e5	354	ret = errno;
618fbcc1	355	perror("Cannot write eventdefs file");
129fd24a	356	goto close_src;
	357	}
	358	} while(!feof(src));
	359
	360	/* Add spacing between facilities */
	361	fwrite("\n", 1, 1, dest);
	362
	363	close_src:
	364	fclose(src);
	365	close_dest:
	366	fclose(dest);
	367	}
	368
	369	closedir(facilities_dir);
	370
86a65fdb	371	error:
129fd24a	372	return ret;
129fd24a	373
5adba60f	374	}
5adba60f	375
129fd24a	376
5adba60f	377	int lttctl_daemon(struct lttctl_handle handle, char trace_name)
	378	{
	379	char channel_path[PATH_MAX] = "";
	380	pid_t pid;
	381	int ret;
	382	char *lttd_path = getenv("LTT_DAEMON");
	383	struct sigaction act;
	384
86a65fdb	385	if(lttd_path == NULL) lttd_path =
86a65fdb	386	PACKAGE_BIN_DIR "/lttd";
5adba60f	387
	388	strcat(channel_path, channel_root);
	389	strcat(channel_path, "/");
	390	strcat(channel_path, trace_name);
	391
	392
988614ed	393	ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size, n_subbufs);
5adba60f	394	if(ret != 0) goto create_error;
5adba60f	395
86a65fdb	396	act.sa_handler = sigchld_handler;
5adba60f	397	sigemptyset(&(act.sa_mask));
86a65fdb	398	sigaddset(&(act.sa_mask), SIGCHLD);
86a65fdb	399	sigaction(SIGCHLD, &act, NULL);
ada84671	400
5adba60f	401	pid = fork();
	402
	403	if(pid > 0) {
86a65fdb	404	int status;
5adba60f	405	/* parent */
86a65fdb	406	while(!(sigchld_received)) pause();
	407
	408	waitpid(pid, &status, 0);
	409	ret = 0;
	410	if(WIFEXITED(status))
	411	ret = WEXITSTATUS(status);
	412	if(ret) goto start_error;
5adba60f	413
5adba60f	414	printf("Creating supplementary trace files\n");
129fd24a	415	ret = create_eventdefs();
129fd24a	416	if(ret) goto start_error;
5adba60f	417
	418	} else if(pid == 0) {
	419	/* child */
45653836	420	int ret;
	421	if(append_trace)
	422	ret = execlp(lttd_path, lttd_path, "-t", trace_root, "-c",
22acb617	423	channel_path, "-d", "-a", "-N", num_threads, NULL);
45653836	424	else
45653836	425	ret = execlp(lttd_path, lttd_path, "-t", trace_root, "-c",
22acb617	426	channel_path, "-d", "-N", num_threads, NULL);
5adba60f	427	if(ret) {
618fbcc1	428	ret = errno;
5adba60f	429	perror("Error in executing the lttd daemon");
618fbcc1	430	exit(ret);
5adba60f	431	}
	432	} else {
	433	/* error */
	434	perror("Error in forking for lttd daemon");
5adba60f	435	}
	436
	437	ret = lttctl_start(handle, trace_name);
	438	if(ret != 0) goto start_error;
	439
	440	return 0;
	441
	442	/* error handling */
	443	start_error:
86a65fdb	444	printf("Trace start error\n");
5adba60f	445	ret \|= lttctl_destroy_trace(handle, trace_name);
	446	create_error:
	447	return ret;
	448	}
	449
	450	int main(int argc, char ** argv)
	451	{
	452	int ret;
	453	struct lttctl_handle *handle;
	454
	455	ret = parse_arguments(argc, argv);
	456
	457	if(ret != 0) show_arguments();
2baf08e5	458	if(ret == EINVAL) return EINVAL;
2baf08e5	459	if(ret == -1) return 0;
5adba60f	460
	461	show_info();
	462
	463	handle = lttctl_create_handle();
	464
	465	if(handle == NULL) return -1;
	466
	467	switch(op) {
b7f08766	468	case CTL_OP_CREATE_START:
	469	ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size,
	470	n_subbufs);
	471	if(!ret)
	472	ret = lttctl_start(handle, trace_name);
	473	break;
5adba60f	474	case CTL_OP_CREATE:
988614ed	475	ret = lttctl_create_trace(handle, trace_name, mode, subbuf_size,
988614ed	476	n_subbufs);
24ba6df0	477	break;
5adba60f	478	case CTL_OP_DESTROY:
	479	ret = lttctl_destroy_trace(handle, trace_name);
	480	break;
b7f08766	481	case CTL_OP_STOP_DESTROY:
	482	ret = lttctl_stop(handle, trace_name);
	483	if(!ret)
	484	ret = lttctl_destroy_trace(handle, trace_name);
	485	break;
5adba60f	486	case CTL_OP_START:
	487	ret = lttctl_start(handle, trace_name);
	488	break;
	489	case CTL_OP_STOP:
	490	ret = lttctl_stop(handle, trace_name);
	491	break;
	492	case CTL_OP_DAEMON:
	493	ret = lttctl_daemon(handle, trace_name);
	494	break;
129fd24a	495	case CTL_OP_DESCRIPTION:
	496	ret = create_eventdefs();
	497	break;
5adba60f	498	case CTL_OP_NONE:
	499	break;
	500	}
	501
	502	ret \|= lttctl_destroy_handle(handle);
	503
	504	return ret;
	505	}