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-rw-r--r--src/test/test-udev.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/src/test/test-udev.c b/src/test/test-udev.c
new file mode 100644
index 0000000..3ca132d
--- /dev/null
+++ b/src/test/test-udev.c
@@ -0,0 +1,168 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/***
+ Copyright © 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
+***/
+
+#include <errno.h>
+#include <sched.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/mount.h>
+#include <sys/signalfd.h>
+#include <unistd.h>
+
+#include "device-private.h"
+#include "fs-util.h"
+#include "log.h"
+#include "main-func.h"
+#include "mkdir-label.h"
+#include "mount-util.h"
+#include "namespace-util.h"
+#include "selinux-util.h"
+#include "signal-util.h"
+#include "string-util.h"
+#include "tests.h"
+#include "udev-event.h"
+#include "version.h"
+
+static int device_new_from_synthetic_event(sd_device **ret, const char *syspath, const char *action) {
+ _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ sd_device_action_t a;
+ int r;
+
+ assert(ret);
+ assert(syspath);
+ assert(action);
+
+ a = device_action_from_string(action);
+ if (a < 0)
+ return a;
+
+ r = sd_device_new_from_syspath(&dev, syspath);
+ if (r < 0)
+ return r;
+
+ r = device_read_uevent_file(dev);
+ if (r < 0)
+ return r;
+
+ r = device_set_action(dev, a);
+ if (r < 0)
+ return r;
+
+ *ret = TAKE_PTR(dev);
+ return 0;
+}
+
+static int fake_filesystems(void) {
+ static const struct fakefs {
+ const char *src;
+ const char *target;
+ const char *error;
+ bool ignore_mount_error;
+ } fakefss[] = {
+ { "test/tmpfs/sys", "/sys", "Failed to mount test /sys", false },
+ { "test/tmpfs/dev", "/dev", "Failed to mount test /dev", false },
+ { "test/run", "/run", "Failed to mount test /run", false },
+ { "test/run", "/etc/udev/rules.d", "Failed to mount empty /etc/udev/rules.d", true },
+ { "test/run", UDEVLIBEXECDIR "/rules.d", "Failed to mount empty " UDEVLIBEXECDIR "/rules.d", true },
+ };
+ int r;
+
+ r = detach_mount_namespace();
+ if (r < 0)
+ return log_error_errno(r, "Failed to detach mount namespace: %m");
+
+ for (size_t i = 0; i < ELEMENTSOF(fakefss); i++) {
+ r = mount_nofollow_verbose(fakefss[i].ignore_mount_error ? LOG_NOTICE : LOG_ERR,
+ fakefss[i].src, fakefss[i].target, NULL, MS_BIND, NULL);
+ if (r < 0 && !fakefss[i].ignore_mount_error)
+ return r;
+ }
+
+ return 0;
+}
+
+static int run(int argc, char *argv[]) {
+ _cleanup_(udev_rules_freep) UdevRules *rules = NULL;
+ _cleanup_(udev_event_freep) UdevEvent *event = NULL;
+ _cleanup_(sd_device_unrefp) sd_device *dev = NULL;
+ const char *devpath, *devname, *action;
+ int r;
+
+ test_setup_logging(LOG_INFO);
+
+ if (!IN_SET(argc, 2, 3))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "This program needs one or two arguments, %d given", argc - 1);
+
+ r = fake_filesystems();
+ if (r < 0)
+ return r;
+
+ /* Let's make sure the test runs with selinux assumed disabled. */
+#if HAVE_SELINUX
+ fini_selinuxmnt();
+#endif
+ mac_selinux_retest();
+
+ if (argc == 2) {
+ if (!streq(argv[1], "check"))
+ return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
+ "Unknown argument: %s", argv[1]);
+
+ return 0;
+ }
+
+ log_debug("version %s", GIT_VERSION);
+
+ r = mac_selinux_init();
+ if (r < 0)
+ return r;
+
+ action = argv[1];
+ devpath = argv[2];
+
+ assert_se(udev_rules_load(&rules, RESOLVE_NAME_EARLY) == 0);
+
+ const char *syspath;
+ syspath = strjoina("/sys", devpath);
+ r = device_new_from_synthetic_event(&dev, syspath, action);
+ if (r < 0)
+ return log_debug_errno(r, "Failed to open device '%s'", devpath);
+
+ assert_se(event = udev_event_new(dev, 0, NULL, log_get_max_level()));
+
+ assert_se(sigprocmask_many(SIG_BLOCK, NULL, SIGTERM, SIGINT, SIGHUP, SIGCHLD, -1) >= 0);
+
+ /* do what devtmpfs usually provides us */
+ if (sd_device_get_devname(dev, &devname) >= 0) {
+ const char *subsystem;
+ mode_t mode = 0600;
+
+ if (sd_device_get_subsystem(dev, &subsystem) >= 0 && streq(subsystem, "block"))
+ mode |= S_IFBLK;
+ else
+ mode |= S_IFCHR;
+
+ if (!streq(action, "remove")) {
+ dev_t devnum = makedev(0, 0);
+
+ (void) mkdir_parents_label(devname, 0755);
+ (void) sd_device_get_devnum(dev, &devnum);
+ if (mknod(devname, mode, devnum) < 0)
+ return log_error_errno(errno, "mknod() failed for '%s': %m", devname);
+ } else {
+ if (unlink(devname) < 0)
+ return log_error_errno(errno, "unlink('%s') failed: %m", devname);
+ (void) rmdir_parents(devname, "/dev");
+ }
+ }
+
+ udev_event_execute_rules(event, -1, 3 * USEC_PER_SEC, SIGKILL, NULL, rules);
+ udev_event_execute_run(event, 3 * USEC_PER_SEC, SIGKILL);
+
+ return 0;
+}
+
+DEFINE_MAIN_FUNCTION(run);