#define BUF_SIZE 4096
enum trace_ctl_op {
- CTL_OP_CREATE_START,
+ CTL_OP_CREATE_START,
CTL_OP_CREATE,
CTL_OP_DESTROY,
- CTL_OP_STOP_DESTROY,
+ CTL_OP_STOP_DESTROY,
CTL_OP_START,
CTL_OP_STOP,
CTL_OP_DAEMON,
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 :
*
*/
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");
+ // "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");
}
break;
- case 'b':
- op = CTL_OP_CREATE_START;
+ case 'b':
+ op = CTL_OP_CREATE_START;
break;
case 'c':
op = CTL_OP_CREATE;
- break;
+ break;
case 'm':
if(argn+1 < argc) {
mode_name = argv[argn+1];
case 'd':
op = CTL_OP_DAEMON;
break;
- case 'e':
- op = CTL_OP_DESCRIPTION;
- break;
+ case 'e':
+ op = CTL_OP_DESCRIPTION;
+ break;
case 't':
if(argn+1 < argc) {
trace_root = argv[argn+1];
ret = EINVAL;
}
break;
- case 'a':
- append_trace = 1;
- break;
- case 'N':
+ case 'a':
+ append_trace = 1;
+ break;
+ case 'N':
if(argn+1 < argc) {
num_threads = argv[argn+1];
argn++;
}
}
- if(op == CTL_OP_DESCRIPTION) {
- if(trace_root == NULL) {
+ 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;
}
{
printf("Linux Trace Toolkit Trace Control\n");
printf("\n");
- if(trace_name != NULL) {
- printf("Controlling trace : %s\n", trace_name);
- 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;
+ 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);
-
+ 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);
+ fclose(src);
close_dest:
- fclose(dest);
- }
+ fclose(dest);
+ }
- closedir(facilities_dir);
+ closedir(facilities_dir);
error:
- return ret;
+ return ret;
}
pid_t pid;
int ret;
char *lttd_path = getenv("LTT_DAEMON");
- struct sigaction act;
if(lttd_path == NULL) lttd_path =
- PACKAGE_BIN_DIR "/lttd";
+ PACKAGE_BIN_DIR "/lttd";
strcat(channel_path, channel_root);
strcat(channel_path, "/");
ret = lttctl_create_trace(handle, trace_name, mode, trace_type, 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;
+ int status = 0;
/* parent */
- while(!(sigchld_received)) pause();
+
+ ret = waitpid(pid, &status, 0);
+ if(ret == -1) {
+ ret = errno;
+ perror("Error in waitpid");
+ goto start_error;
+ }
- waitpid(pid, &status, 0);
- ret = 0;
- if(WIFEXITED(status))
- ret = WEXITSTATUS(status);
- if(ret) goto start_error;
+ 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;
+ 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);
+ 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;
+ ret = errno;
perror("Error in executing the lttd daemon");
exit(ret);
}
/* error handling */
start_error:
- printf("Trace start error\n");
+ printf("Trace start error\n");
ret |= lttctl_destroy_trace(handle, trace_name);
create_error:
return ret;
if(handle == NULL) return -1;
switch(op) {
- case CTL_OP_CREATE_START:
+ case CTL_OP_CREATE_START:
ret = lttctl_create_trace(handle, trace_name, mode, trace_type, subbuf_size,
n_subbufs);
- if(!ret)
- ret = lttctl_start(handle, trace_name);
- break;
- case CTL_OP_CREATE:
+ if(!ret)
+ ret = lttctl_start(handle, trace_name);
+ break;
+ case CTL_OP_CREATE:
ret = lttctl_create_trace(handle, trace_name, mode, trace_type, subbuf_size,
n_subbufs);
- break;
+ 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);
+ if(!ret)
+ ret = lttctl_destroy_trace(handle, trace_name);
break;
case CTL_OP_START:
ret = lttctl_start(handle, trace_name);
case CTL_OP_DAEMON:
ret = lttctl_daemon(handle, trace_name);
break;
- case CTL_OP_DESCRIPTION:
- ret = create_eventdefs();
- break;
+ case CTL_OP_DESCRIPTION:
+ ret = create_eventdefs();
+ break;
case CTL_OP_NONE:
break;
}
projects / ltt-control.git / blobdiff