/* lnstat_scan_dir - find and parse all available statistics files/fields */
struct lnstat_file *lnstat_scan_dir(const char *path, const int num_req_files,
const char **req_files)
{
DIR *dir;
struct lnstat_file *lnstat_files = NULL;
struct dirent *de;
if (!path)
path = PROC_NET_STAT;
dir = opendir(path);
if (!dir) {
struct lnstat_file *lf;
/* Old kernel, before /proc/net/stat was introduced */
fprintf(stderr, "Your kernel doesn't have lnstat support. ");
/* we only support rtstat, not multiple files */
if (num_req_files >= 2) {
fputc('\n', stderr);
return NULL;
}
/* we really only accept rt_cache */
if (num_req_files && !name_in_array(num_req_files,
req_files, "rt_cache")) {
fputc('\n', stderr);
return NULL;
}
fprintf(stderr, "Fallback to old rtstat-only operation\n");
lf = alloc_and_open("/proc/net", "rt_cache_stat");
if (!lf)
return NULL;
lf->compat = 1;
strncpy(lf->basename, "rt_cache", sizeof(lf->basename));
/* FIXME: support for old files */
if (lnstat_scan_compat_rtstat_fields(lf) < 0)
return NULL;
lf->next = lnstat_files;
lnstat_files = lf;
return lnstat_files;
}
while ((de = readdir(dir))) {
struct lnstat_file *lf;
if (de->d_type != DT_REG)
continue;
if (num_req_files && !name_in_array(num_req_files,
req_files, de->d_name))
continue;
lf = alloc_and_open(path, de->d_name);
if (!lf)
return NULL;
/* fill in field structure */
if (lnstat_scan_fields(lf) < 0)
return NULL;
/* prepend to global list */
lf->next = lnstat_files;
lnstat_files = lf;
}
closedir(dir);
return lnstat_files;
}
struct lnstat_file *lnstat_scan_dir(const char *path, const int num_req_files,
const char **req_files)
{
DIR *dir;
struct lnstat_file *lnstat_files = NULL;
struct dirent *de;
if (!path)
path = PROC_NET_STAT;
dir = opendir(path);
if (!dir) {
struct lnstat_file *lf;
fprintf(stderr, "Your kernel doesn't have lnstat support. ");
if (num_req_files >= 2) {
fputc('\n', stderr);
return NULL;
}
if (num_req_files && !name_in_array(num_req_files,
req_files, "rt_cache")) {
fputc('\n', stderr);
return NULL;
}
fprintf(stderr, "Fallback to old rtstat-only operation\n");
lf = alloc_and_open("/proc/net", "rt_cache_stat");
if (!lf)
return NULL;
lf->compat = 1;
strncpy(lf->basename, "rt_cache", sizeof(lf->basename));
if (lnstat_scan_compat_rtstat_fields(lf) < 0)
return NULL;
lf->next = lnstat_files;
lnstat_files = lf;
return lnstat_files;
}
while ((de = readdir(dir))) {
struct lnstat_file *lf;
if (de->d_type != DT_REG)
continue;
if (num_req_files && !name_in_array(num_req_files,
req_files, de->d_name))
continue;
lf = alloc_and_open(path, de->d_name);
if (!lf)
return NULL;
if (lnstat_scan_fields(lf) < 0)
return NULL;
lf->next = lnstat_files;
lnstat_files = lf;
}
closedir(dir);
return lnstat_files;
}
