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https://github.com/systemd/systemd-stable.git
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sysfs: handle bus/class top-level directories
This commit is contained in:
parent
4ad47b2de6
commit
96d3d86145
32
udev_sysfs.c
32
udev_sysfs.c
@ -215,7 +215,7 @@ struct sysfs_device *sysfs_device_get(const char *devpath)
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if (pos != NULL)
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pos[0] = '\0';
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else
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dev->subsystem[0] = '\0';
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strlcpy(dev->subsystem, "subsystem", sizeof(dev->subsystem));
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} else if (strncmp(dev->devpath, "/block/", 7) == 0) {
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strlcpy(dev->subsystem, "block", sizeof(dev->subsystem));
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} else if (strncmp(dev->devpath, "/devices/", 9) == 0) {
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@ -235,6 +235,14 @@ struct sysfs_device *sysfs_device_get(const char *devpath)
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strlcpy(dev->subsystem, "drivers", sizeof(dev->subsystem));
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} else if (strncmp(dev->devpath, "/module/", 8) == 0) {
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strlcpy(dev->subsystem, "module", sizeof(dev->subsystem));
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} else if (strncmp(dev->devpath, "/subsystem/", 11) == 0) {
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pos = strrchr(dev->devpath, '/');
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if (pos == &dev->devpath[10])
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strlcpy(dev->subsystem, "subsystem", sizeof(dev->subsystem));
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} else if (strncmp(dev->devpath, "/bus/", 5) == 0) {
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pos = strrchr(dev->devpath, '/');
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if (pos == &dev->devpath[4])
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strlcpy(dev->subsystem, "subsystem", sizeof(dev->subsystem));
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}
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/* get driver name */
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@ -267,9 +275,10 @@ struct sysfs_device *sysfs_device_get_parent(struct sysfs_device *dev)
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if (dev->parent != NULL)
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return dev->parent;
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/* requesting a parent is only valid for devices */
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/* requesting a parent is only valid for these devpathes */
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if ((strncmp(dev->devpath, "/devices/", 9) != 0) &&
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(strncmp(dev->devpath, "/subsystem/", 11) != 0) &&
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(strncmp(dev->devpath, "/bus/", 5) != 0) &&
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(strncmp(dev->devpath, "/class/", 7) != 0) &&
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(strncmp(dev->devpath, "/block/", 7) != 0))
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return NULL;
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@ -283,20 +292,6 @@ struct sysfs_device *sysfs_device_get_parent(struct sysfs_device *dev)
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return NULL;
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pos[0] = '\0';
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/* are we at the top level of /devices */
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if (strcmp(parent_devpath, "/devices") == 0) {
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dbg("/devices top level");
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return NULL;
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}
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/* at the subsystems top level we want to follow the old-style "device" link */
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if (strncmp(parent_devpath, "/subsystem", 10) == 0) {
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pos = strrchr(parent_devpath, '/');
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if (pos == &parent_devpath[10] || pos == parent_devpath || strcmp(pos, "/devices") == 0) {
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dbg("/subsystem top level, look for device link");
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goto device_link;
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}
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}
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if (strncmp(parent_devpath, "/class", 6) == 0) {
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pos = strrchr(parent_devpath, '/');
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if (pos == &parent_devpath[6] || pos == parent_devpath) {
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@ -309,6 +304,11 @@ struct sysfs_device *sysfs_device_get_parent(struct sysfs_device *dev)
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goto device_link;
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}
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/* are we at the top level? */
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pos = strrchr(parent_devpath, '/');
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if (pos == NULL || pos == parent_devpath)
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return NULL;
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/* get parent and remember it */
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dev->parent = sysfs_device_get(parent_devpath);
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return dev->parent;
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