libudev: enumerate - add udev_enumerate_add_match_parent()

[elogind.git] / udev / udevadm-trigger.c

diff --git a/udev/udevadm-trigger.c b/udev/udevadm-trigger.c
index d31b4fbd8d7490b147c127c1a58fcbc2f6a054cb..3b53be564640dfefeb170a63079e7db2a0028148 100644 (file)
--- a/udev/udevadm-trigger.c
+++ b/udev/udevadm-trigger.c
@@ -103,6 +103,7 @@ int udevadm_trigger(struct udev *udev, int argc, char *argv[])
                { "property-match", required_argument, NULL, 'p' },
                { "tag-match", required_argument, NULL, 'g' },
                { "sysname-match", required_argument, NULL, 'y' },
+               { "parent-match", required_argument, NULL, 'b' },
                { "help", no_argument, NULL, 'h' },
                {}
        };
@@ -128,7 +129,7 @@ int udevadm_trigger(struct udev *udev, int argc, char *argv[])
                const char *val;
                char buf[UTIL_PATH_SIZE];
 
-               option = getopt_long(argc, argv, "vng:o:t:hc:p:s:S:a:A:y:", options, NULL);
+               option = getopt_long(argc, argv, "vng:o:t:hc:p:s:S:a:A:y:b:", options, NULL);
                if (option == -1)
                        break;
 
@@ -179,6 +180,27 @@ int udevadm_trigger(struct udev *udev, int argc, char *argv[])
                case 'y':
                        udev_enumerate_add_match_sysname(udev_enumerate, optarg);
                        break;
+               case 'b': {
+                       char path[UTIL_PATH_SIZE];
+                       struct udev_device *dev;
+
+                       /* add sys dir if needed */
+                       if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0)
+                               util_strscpyl(path, sizeof(path), udev_get_sys_path(udev), optarg, NULL);
+                       else
+                               util_strscpy(path, sizeof(path), optarg);
+                       util_remove_trailing_chars(path, '/');
+                       dev = udev_device_new_from_syspath(udev, path);
+                       if (dev == NULL) {
+                               err(udev, "unable to open the device '%s'\n", optarg);
+                               rc = 2;
+                               goto exit;
+                       }
+                       udev_enumerate_add_match_parent(udev_enumerate, dev);
+                       /* drop reference immediately, enumerate pins the device as long as needed */
+                       udev_device_unref(dev);
+                       break;
+               }
                case 'h':
                        printf("Usage: udevadm trigger OPTIONS\n"
                               "  --verbose                       print the list of devices while running\n"
@@ -196,6 +218,7 @@ int udevadm_trigger(struct udev *udev, int argc, char *argv[])
                               "  --property-match=<key>=<value>  trigger devices with a matching property\n"
                               "  --tag-match=<key>=<value>       trigger devices with a matching property\n"
                               "  --sysname-match=<name>          trigger devices with a matching name\n"
+                              "  --parent-match=<name>           trigger devices with that parent device\n"
                               "  --help\n\n");
                        goto exit;
                default: