static int add_config_from_dir(const char *dir)
{
int count, res, i;
struct dirent **namelist;
count = scandir(dir, &namelist, config_file_filter, (int (*)(const struct dirent **, const struct dirent **))alphasort);
if (count < 0) {
/* Do not return an error if directory does not exist */
if (errno == ENOENT)
return 0;
sensors_parse_error_wfn(strerror(errno), NULL, 0);
return -SENSORS_ERR_PARSE;
}
for (res = 0, i = 0; !res && i < count; i++) {
int len;
char path[PATH_MAX];
FILE *input;
struct stat st;
len = snprintf(path, sizeof(path), "%s/%s", dir,
namelist[i]->d_name);
if (len < 0 || len >= (int)sizeof(path)) {
res = -SENSORS_ERR_PARSE;
continue;
}
/* Only accept regular files */
if (stat(path, &st) < 0 || !S_ISREG(st.st_mode))
continue;
input = fopen(path, "r");
if (input) {
res = parse_config(input, path);
fclose(input);
} else {
res = -SENSORS_ERR_PARSE;
sensors_parse_error_wfn(strerror(errno), path, 0);
}
}
/* Free memory allocated by scandir() */
for (i = 0; i < count; i++)
free(namelist[i]);
free(namelist);
return res;
}
/* Execute all set statements for this particular chip. The chip may not
contain wildcards! This function will return 0 on success, and <0 on
failure. */
static int sensors_do_this_chip_sets(const sensors_chip_name *name)
{
const sensors_chip_features *chip_features;
sensors_chip *chip;
double value;
int i;
int err = 0, res;
const sensors_subfeature *subfeature;
chip_features = sensors_lookup_chip(name); /* Can't fail */
for (chip = NULL; (chip = sensors_for_all_config_chips(name, chip));)
for (i = 0; i < chip->sets_count; i++) {
subfeature = sensors_lookup_subfeature_name(chip_features,
chip->sets[i].name);
if (!subfeature) {
sensors_parse_error_wfn("Unknown feature name",
chip->sets[i].line.filename,
chip->sets[i].line.lineno);
err = -SENSORS_ERR_NO_ENTRY;
continue;
}
res = sensors_eval_expr(chip_features,
chip->sets[i].value, 0,
0, &value);
if (res) {
sensors_parse_error_wfn("Error parsing expression",
chip->sets[i].line.filename,
chip->sets[i].line.lineno);
err = res;
continue;
}
if ((res = sensors_set_value(name, subfeature->number,
value))) {
sensors_parse_error_wfn("Failed to set value",
chip->sets[i].line.filename,
chip->sets[i].line.lineno);
err = res;
continue;
}
}
return err;
}
int sensors_init(FILE *input)
{
int res;
if (!sensors_init_sysfs())
return -SENSORS_ERR_KERNEL;
if ((res = sensors_read_sysfs_bus()) ||
(res = sensors_read_sysfs_chips()))
goto exit_cleanup;
if (input) {
res = parse_config(input, NULL);
if (res)
goto exit_cleanup;
} else {
const char* name;
/* No configuration provided, use default */
input = fopen(name = DEFAULT_CONFIG_FILE, "r");
if (!input && errno == ENOENT)
input = fopen(name = ALT_CONFIG_FILE, "r");
if (input) {
res = parse_config(input, name);
fclose(input);
if (res)
goto exit_cleanup;
} else if (errno != ENOENT) {
sensors_parse_error_wfn(strerror(errno), name, 0);
res = -SENSORS_ERR_PARSE;
goto exit_cleanup;
}
/* Also check for files in default directory */
res = add_config_from_dir(DEFAULT_CONFIG_DIR);
if (res)
goto exit_cleanup;
}
return 0;
exit_cleanup:
sensors_cleanup();
return res;
}
