syspath_to_db_path(udev_device, filename, sizeof(filename));
if (lstat(filename, &stats) != 0) {
- info(udev_device->udev, "no db file to read %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "no db file to read %s: %m\n", filename);
return -1;
}
if ((stats.st_mode & S_IFMT) == S_IFLNK) {
char target[UTIL_PATH_SIZE];
int target_len;
+ char *next;
target_len = readlink(filename, target, sizeof(target));
if (target_len > 0)
target[target_len] = '\0';
else {
- info(udev_device->udev, "error reading db link %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "error reading db link %s: %m\n", filename);
return -1;
}
+
+ next = strchr(target, ' ');
+ if (next != NULL) {
+ next[0] = '\0';
+ next = &next[1];
+ }
if (asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), target) < 0)
return -ENOMEM;
+ while (next != NULL) {
+ char linkname[UTIL_PATH_SIZE];
+ const char *lnk;
+
+ lnk = next;
+ next = strchr(next, ' ');
+ if (next != NULL) {
+ next[0] = '\0';
+ next = &next[1];
+ }
+ util_strlcpy(linkname, udev_get_dev_path(udev_device->udev), sizeof(linkname));
+ util_strlcat(linkname, "/", sizeof(linkname));
+ util_strlcat(linkname, lnk, sizeof(linkname));
+ device_add_devlink(udev_device, linkname);
+ }
info(udev_device->udev, "device %p filled with db symlink data '%s'\n", udev_device, udev_device->devnode);
return 0;
}
f = fopen(filename, "r");
if (f == NULL) {
- info(udev_device->udev, "error reading db file %s: %s\n", filename, strerror(errno));
+ info(udev_device->udev, "error reading db file %s: %m\n", filename);
return -1;
}
while (fgets(line, sizeof(line), f)) {
device->info_loaded = 1;
}
-struct udev_device *device_init(struct udev *udev)
+struct udev_device *device_new(struct udev *udev)
{
struct udev_device *udev_device;
**/
struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath)
{
+ size_t len;
+ const char *subdir;
char path[UTIL_PATH_SIZE];
+ char *pos;
struct stat statbuf;
struct udev_device *udev_device;
if (syspath == NULL)
return NULL;
- util_strlcpy(path, syspath, sizeof(path));
- util_strlcat(path, "/uevent", sizeof(path));
- if (stat(path, &statbuf) != 0) {
- info(udev, "not a device :%s\n", syspath);
+ /* path starts in sys */
+ len = strlen(udev_get_sys_path(udev));
+ if (strncmp(syspath, udev_get_sys_path(udev), len) != 0) {
+ info(udev, "not in sys :%s\n", syspath);
return NULL;
}
- udev_device = device_init(udev);
- if (udev_device == NULL)
+ /* path is not a root directory */
+ subdir = &syspath[len+1];
+ pos = strrchr(subdir, '/');
+ if (pos == NULL || pos < &subdir[2]) {
+ info(udev, "not a subdir :%s\n", syspath);
return NULL;
+ }
/* resolve possible symlink to real path */
util_strlcpy(path, syspath, sizeof(path));
util_resolve_sys_link(udev, path, sizeof(path));
+
+ /* try to resolve the silly block layout if needed */
+ if (strncmp(&path[len], "/block/", 7) == 0) {
+ char block[UTIL_PATH_SIZE];
+ char part[UTIL_PATH_SIZE];
+
+ util_strlcpy(block, path, sizeof(block));
+ pos = strrchr(block, '/');
+ if (pos == NULL)
+ return NULL;
+ util_strlcpy(part, pos, sizeof(part));
+ pos[0] = '\0';
+ if (util_resolve_sys_link(udev, block, sizeof(block)) == 0) {
+ util_strlcpy(path, block, sizeof(path));
+ util_strlcat(path, part, sizeof(path));
+ }
+ }
+
+ /* path exists in sys */
+ if (strncmp(&syspath[len], "/devices/", 9) == 0 ||
+ strncmp(&syspath[len], "/class/", 7) == 0 ||
+ strncmp(&syspath[len], "/block/", 7) == 0) {
+ char file[UTIL_PATH_SIZE];
+
+ /* all "devices" require a "uevent" file */
+ util_strlcpy(file, path, sizeof(file));
+ util_strlcat(file, "/uevent", sizeof(file));
+ if (stat(file, &statbuf) != 0) {
+ info(udev, "not a device: %s\n", syspath);
+ return NULL;
+ }
+ } else {
+ /* everything else just needs to be a directory */
+ if (stat(path, &statbuf) != 0 || !S_ISDIR(statbuf.st_mode)) {
+ info(udev, "directory not found: %s\n", syspath);
+ return NULL;
+ }
+ }
+
+ udev_device = device_new(udev);
+ if (udev_device == NULL)
+ return NULL;
+
device_set_syspath(udev_device, path);
info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
{
char path[UTIL_PATH_SIZE];
const char *type_str;
- struct udev_enumerate *enumerate;
+ struct udev_enumerate *udev_enumerate;
struct udev_list_entry *list_entry;
struct udev_device *device = NULL;
else
return NULL;
- /* /sys/dev/{block,char}/<maj>:<min> links */
+ /* /sys/dev/{block,char}/<maj>:<min> link */
snprintf(path, sizeof(path), "%s/dev/%s/%u:%u", udev_get_sys_path(udev),
type_str, major(devnum), minor(devnum));
if (util_resolve_sys_link(udev, path, sizeof(path)) == 0)
return udev_device_new_from_syspath(udev, path);
- /* fallback to search all sys devices for the major/minor */
- enumerate = udev_enumerate_new_from_subsystems(udev, NULL);
- if (enumerate == NULL)
+ udev_enumerate = udev_enumerate_new(udev);
+ if (udev_enumerate == NULL)
return NULL;
- udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) {
+
+ /* fallback to search sys devices for the major/minor */
+ if (type == 'b')
+ udev_enumerate_add_match_subsystem(udev_enumerate, "block");
+ else if (type == 'c')
+ udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block");
+ udev_enumerate_scan_devices(udev_enumerate);
+ udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(udev_enumerate)) {
struct udev_device *device_loop;
device_loop = udev_device_new_from_syspath(udev, udev_list_entry_get_name(list_entry));
if (device_loop != NULL) {
if (udev_device_get_devnum(device_loop) == devnum) {
+ if (type == 'b' && strcmp(udev_device_get_subsystem(device_loop), "block") != 0)
+ continue;
+ if (type == 'c' && strcmp(udev_device_get_subsystem(device_loop), "block") == 0)
+ continue;
device = device_loop;
break;
}
udev_device_unref(device_loop);
}
}
- udev_enumerate_unref(enumerate);
+ udev_enumerate_unref(udev_enumerate);
return device;
}
{
struct udev_device *udev_device_parent = NULL;
char path[UTIL_PATH_SIZE];
- char *pos;
+ const char *subdir;
- if (udev_device == NULL)
- return NULL;
+ /* follow "device" link in deprecated sys layout */
+ if (strncmp(udev_device->devpath, "/class/", 7) == 0 ||
+ strncmp(udev_device->devpath, "/block/", 7) == 0) {
+ util_strlcpy(path, udev_device->syspath, sizeof(path));
+ util_strlcat(path, "/device", sizeof(path));
+ if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0)
+ udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
+ return udev_device_parent;
+ }
util_strlcpy(path, udev_device->syspath, sizeof(path));
+ subdir = &path[strlen(udev_get_sys_path(udev_device->udev))+1];
while (1) {
- pos = strrchr(path, '/');
- if (pos == path || pos == NULL)
+ char *pos;
+
+ pos = strrchr(subdir, '/');
+ if (pos == NULL || pos < &subdir[2])
break;
pos[0] = '\0';
udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
if (udev_device_parent != NULL)
return udev_device_parent;
}
-
- /* follow "device" link in deprecated sys /sys/class/ layout */
- if (strncmp(udev_device->devpath, "/class/", 7) == 0) {
- util_strlcpy(path, udev_device->syspath, sizeof(path));
- util_strlcat(path, "/device", sizeof(path));
- if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) {
- udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
- if (udev_device_parent != NULL)
- return udev_device_parent;
- }
- }
return NULL;
}
struct udev_device *udev_device_get_parent(struct udev_device *udev_device)
{
+ if (udev_device == NULL)
+ return NULL;
+
if (udev_device->parent_device != NULL) {
info(udev_device->udev, "returning existing parent %p\n", udev_device->parent_device);
return udev_device->parent_device;
return udev_device->parent_device;
}
+struct udev_device *udev_device_get_parent_with_subsystem(struct udev_device *udev_device, const char *subsystem)
+{
+ struct udev_device *parent;
+
+ parent = udev_device_get_parent(udev_device);
+ while (parent != NULL) {
+ const char *parent_subsystem;
+
+ parent_subsystem = udev_device_get_subsystem(parent);
+ if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0)
+ break;
+ parent = udev_device_get_parent(parent);
+ }
+ return parent;
+}
+
/**
* udev_device_get_udev:
* @udev_device: udev device
util_strlcat(path, attr, sizeof(path));
if (lstat(path, &statbuf) != 0) {
- info(udev_device->udev, "stat '%s' failed: %s\n", path, strerror(errno));
+ info(udev_device->udev, "stat '%s' failed: %m\n", path);
goto out;
}
~ianmdlvl / elogind.git / blobdiff