char *tracecmd_find_tracing_dir(void)
{
char *debug_str = NULL;
char fspath[MAX_PATH+1];
char *tracing_dir;
char type[100];
int use_debug = 0;
FILE *fp;
if ((fp = fopen("/proc/mounts","r")) == NULL) {
warning("Can't open /proc/mounts for read");
return NULL;
}
while (fscanf(fp, "%*s %"
STR(MAX_PATH)
"s %99s %*s %*d %*d\n",
fspath, type) == 2) {
if (strcmp(type, "tracefs") == 0)
break;
if (!debug_str && strcmp(type, "debugfs") == 0) {
debug_str = strdup(fspath);
if (!debug_str)
return NULL;
}
}
fclose(fp);
if (strcmp(type, "tracefs") != 0) {
if (mount_tracefs() < 0) {
if (debug_str) {
strncpy(fspath, debug_str, MAX_PATH);
fspath[MAX_PATH] = 0;
} else {
if (mount_debugfs() < 0) {
warning("debugfs not mounted, please mount");
return NULL;
}
strcpy(fspath, DEBUGFS_PATH);
}
use_debug = 1;
} else
strcpy(fspath, TRACEFS_PATH);
}
free(debug_str);
if (use_debug) {
tracing_dir = malloc(strlen(fspath) + 9);
if (!tracing_dir)
return NULL;
sprintf(tracing_dir, "%s/tracing", fspath);
} else {
tracing_dir = strdup(fspath);
if (!tracing_dir)
return NULL;
}
return tracing_dir;
}
char *tracecmd_find_tracing_dir(void)
{
char debugfs[MAX_PATH+1];
char *tracing_dir;
char type[100];
FILE *fp;
if ((fp = fopen("/proc/mounts","r")) == NULL) {
warning("Can't open /proc/mounts for read");
return NULL;
}
while (fscanf(fp, "%*s %"
STR(MAX_PATH)
"s %99s %*s %*d %*d\n",
debugfs, type) == 2) {
if (strcmp(type, "debugfs") == 0)
break;
}
fclose(fp);
if (strcmp(type, "debugfs") != 0) {
/* If debugfs is not mounted, try to mount it */
if (mount_debugfs() < 0) {
warning("debugfs not mounted, please mount");
return NULL;
}
strcpy(debugfs, DEBUGFS_PATH);
}
tracing_dir = malloc_or_die(strlen(debugfs) + 9);
if (!tracing_dir)
return NULL;
sprintf(tracing_dir, "%s/tracing", debugfs);
return tracing_dir;
}