#include <ctype.h>
#include <errno.h>
+#include "sd-device.h"
+
#include "device-nodes.h"
#include "libudev-util.h"
#include "string-util.h"
*/
/* handle "[<SUBSYSTEM>/<KERNEL>]<attribute>" format */
-int util_resolve_subsys_kernel(const char *string,
- char *result, size_t maxsize, int read_value) {
- char temp[UTIL_PATH_SIZE];
- char *subsys;
- char *sysname;
- struct udev_device *dev;
- char *attr;
+int util_resolve_subsys_kernel(const char *string, char *result, size_t maxsize, bool read_value) {
+ char temp[UTIL_PATH_SIZE], *subsys, *sysname, *attr;
+ _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ const char *val;
+ int r;
if (string[0] != '[')
- return -1;
+ return -EINVAL;
strscpy(temp, sizeof(temp), string);
sysname = strchr(subsys, '/');
if (!sysname)
- return -1;
+ return -EINVAL;
sysname[0] = '\0';
sysname = &sysname[1];
attr = strchr(sysname, ']');
if (!attr)
- return -1;
+ return -EINVAL;
attr[0] = '\0';
attr = &attr[1];
if (attr[0] == '/')
attr = NULL;
if (read_value && !attr)
- return -1;
+ return -EINVAL;
- dev = udev_device_new_from_subsystem_sysname(NULL, subsys, sysname);
- if (!dev)
- return -1;
+ r = sd_device_new_from_subsystem_sysname(&dev, subsys, sysname);
+ if (r < 0)
+ return r;
if (read_value) {
- const char *val;
-
- val = udev_device_get_sysattr_value(dev, attr);
- if (val)
- strscpy(result, maxsize, val);
- else
+ r = sd_device_get_sysattr_value(dev, attr, &val);
+ if (r < 0 && r != -ENOENT)
+ return r;
+ if (r == -ENOENT)
result[0] = '\0';
+ else
+ strscpy(result, maxsize, val);
log_debug("value '[%s/%s]%s' is '%s'", subsys, sysname, attr, result);
} else {
- size_t l;
- char *s;
-
- s = result;
- l = strpcpyl(&s, maxsize, udev_device_get_syspath(dev), NULL);
- if (attr)
- strpcpyl(&s, l, "/", attr, NULL);
- log_debug("path '[%s/%s]%s' is '%s'", subsys, sysname, attr, result);
+ r = sd_device_get_syspath(dev, &val);
+ if (r < 0)
+ return r;
+
+ strscpyl(result, maxsize, val, attr ? "/" : NULL, attr ?: NULL, NULL);
+ log_debug("path '[%s/%s]%s' is '%s'", subsys, sysname, strempty(attr), result);
}
- udev_device_unref(dev);
return 0;
}
size_t util_path_encode(const char *src, char *dest, size_t size);
size_t util_replace_whitespace(const char *str, char *to, size_t len);
size_t util_replace_chars(char *str, const char *white);
-int util_resolve_subsys_kernel(const char *string, char *result, size_t maxsize, int read_value);
+int util_resolve_subsys_kernel(const char *string, char *result, size_t maxsize, bool read_value);
/* Cleanup functions */
DEFINE_TRIVIAL_CLEANUP_FUNC(struct udev*, udev_unref);
return -1;
break;
case SB_SUBSYS:
- if (util_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), 1) != 0)
+ if (util_resolve_subsys_kernel(name, vbuf, sizeof(vbuf), true) != 0)
return -1;
value = vbuf;
break;
int match;
udev_event_apply_format(event, rules_str(rules, cur->key.value_off), filename, sizeof(filename), false);
- if (util_resolve_subsys_kernel(filename, filename, sizeof(filename), 0) != 0) {
+ if (util_resolve_subsys_kernel(filename, filename, sizeof(filename), false) != 0) {
if (filename[0] != '/') {
char tmp[UTIL_PATH_SIZE];
const char *key_name;
key_name = rules_str(rules, cur->key.attr_off);
- if (util_resolve_subsys_kernel(key_name, attr, sizeof(attr), 0) != 0 &&
+ if (util_resolve_subsys_kernel(key_name, attr, sizeof(attr), false) != 0 &&
sd_device_get_syspath(dev, &val) >= 0)
strscpyl(attr, sizeof(attr), val, "/", key_name, NULL);
attr_subst_subdir(attr, sizeof(attr));