/* SPDX-License-Identifier: LGPL-2.1-or-later */ #include <errno.h> #include <getopt.h> #include <sys/epoll.h> #include <unistd.h> #include "alloc-util.h" #include "devnum-util.h" #include "fd-util.h" #include "libudev-list-internal.h" #include "libudev-util.h" #include "log.h" #include "main-func.h" #include "stdio-util.h" #include "string-util.h" #include "tests.h" #include "version.h" static bool arg_monitor = false; static void print_device(struct udev_device *device) { const char *str; dev_t devnum; int count; struct udev_list_entry *list_entry; log_info("*** device: %p ***", device); str = udev_device_get_action(device); if (str) log_info("action: '%s'", str); str = udev_device_get_syspath(device); log_info("syspath: '%s'", str); str = udev_device_get_sysname(device); log_info("sysname: '%s'", str); str = udev_device_get_sysnum(device); if (str) log_info("sysnum: '%s'", str); str = udev_device_get_devpath(device); log_info("devpath: '%s'", str); str = udev_device_get_subsystem(device); if (str) log_info("subsystem: '%s'", str); str = udev_device_get_devtype(device); if (str) log_info("devtype: '%s'", str); str = udev_device_get_driver(device); if (str) log_info("driver: '%s'", str); str = udev_device_get_devnode(device); if (str) log_info("devname: '%s'", str); devnum = udev_device_get_devnum(device); if (major(devnum) > 0) log_info("devnum: %u:%u", major(devnum), minor(devnum)); count = 0; udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(device)) { log_info("link: '%s'", udev_list_entry_get_name(list_entry)); count++; } if (count > 0) log_info("found %i links", count); count = 0; udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(device)) { log_info("property: '%s=%s'", udev_list_entry_get_name(list_entry), udev_list_entry_get_value(list_entry)); count++; } if (count > 0) log_info("found %i properties", count); str = udev_device_get_property_value(device, "MAJOR"); if (str) log_info("MAJOR: '%s'", str); str = udev_device_get_sysattr_value(device, "dev"); if (str) log_info("attr{dev}: '%s'", str); } static void test_device(struct udev *udev, const char *syspath) { _cleanup_(udev_device_unrefp) struct udev_device *device = NULL; log_info("/* %s, device %s */", __func__, syspath); device = udev_device_new_from_syspath(udev, syspath); if (device) print_device(device); else log_warning_errno(errno, "udev_device_new_from_syspath: %m"); } static void test_device_parents(struct udev *udev, const char *syspath) { _cleanup_(udev_device_unrefp) struct udev_device *device = NULL; struct udev_device *device_parent; log_info("/* %s, device %s */", __func__, syspath); device = udev_device_new_from_syspath(udev, syspath); if (!device) return; log_info("looking at parents"); device_parent = device; do { print_device(device_parent); device_parent = udev_device_get_parent(device_parent); } while (device_parent != NULL); log_info("looking at parents again"); device_parent = device; do { print_device(device_parent); device_parent = udev_device_get_parent(device_parent); } while (device_parent != NULL); } static void test_device_devnum(struct udev *udev) { dev_t devnum = makedev(1, 3); _cleanup_(udev_device_unrefp) struct udev_device *device; log_info("/* %s, device " DEVNUM_FORMAT_STR " */", __func__, DEVNUM_FORMAT_VAL(devnum)); device = udev_device_new_from_devnum(udev, 'c', devnum); if (device) print_device(device); else log_warning_errno(errno, "udev_device_new_from_devnum: %m"); } static void test_device_subsys_name(struct udev *udev, const char *subsys, const char *dev) { _cleanup_(udev_device_unrefp) struct udev_device *device; log_info("looking up device: '%s:%s'", subsys, dev); device = udev_device_new_from_subsystem_sysname(udev, subsys, dev); if (!device) log_warning_errno(errno, "udev_device_new_from_subsystem_sysname: %m"); else print_device(device); } static int enumerate_print_list(struct udev_enumerate *enumerate) { struct udev_list_entry *list_entry; int count = 0; udev_list_entry_foreach(list_entry, udev_enumerate_get_list_entry(enumerate)) { struct udev_device *device; device = udev_device_new_from_syspath(udev_enumerate_get_udev(enumerate), udev_list_entry_get_name(list_entry)); if (device) { log_info("device: '%s' (%s)", udev_device_get_syspath(device), udev_device_get_subsystem(device)); udev_device_unref(device); count++; } } log_info("found %i devices", count); return count; } static void test_monitor(struct udev *udev) { _cleanup_(udev_monitor_unrefp) struct udev_monitor *udev_monitor = NULL; _cleanup_close_ int fd_ep = -EBADF; int fd_udev; struct epoll_event ep_udev = { .events = EPOLLIN, }, ep_stdin = { .events = EPOLLIN, .data.fd = STDIN_FILENO, }; log_info("/* %s */", __func__); fd_ep = epoll_create1(EPOLL_CLOEXEC); assert_se(fd_ep >= 0); udev_monitor = udev_monitor_new_from_netlink(udev, "udev"); assert_se(udev_monitor != NULL); fd_udev = udev_monitor_get_fd(udev_monitor); ep_udev.data.fd = fd_udev; assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "block", NULL) >= 0); assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "tty", NULL) >= 0); assert_se(udev_monitor_filter_add_match_subsystem_devtype(udev_monitor, "usb", "usb_device") >= 0); assert_se(udev_monitor_enable_receiving(udev_monitor) >= 0); assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, fd_udev, &ep_udev) >= 0); assert_se(epoll_ctl(fd_ep, EPOLL_CTL_ADD, STDIN_FILENO, &ep_stdin) >= 0); for (;;) { int fdcount; struct epoll_event ev[4]; struct udev_device *device; int i; printf("waiting for events from udev, press ENTER to exit\n"); fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), -1); printf("epoll fd count: %i\n", fdcount); for (i = 0; i < fdcount; i++) { if (ev[i].data.fd == fd_udev && ev[i].events & EPOLLIN) { device = udev_monitor_receive_device(udev_monitor); if (!device) { printf("no device from socket\n"); continue; } print_device(device); udev_device_unref(device); } else if (ev[i].data.fd == STDIN_FILENO && ev[i].events & EPOLLIN) { printf("exiting loop\n"); return; } } } } static void test_queue(struct udev *udev) { struct udev_queue *udev_queue; bool empty; log_info("/* %s */", __func__); assert_se(udev_queue = udev_queue_new(udev)); empty = udev_queue_get_queue_is_empty(udev_queue); log_info("queue is %s", empty ? "empty" : "not empty"); udev_queue_unref(udev_queue); } static int test_enumerate(struct udev *udev, const char *subsystem) { struct udev_enumerate *udev_enumerate; int r; log_info("/* %s */", __func__); log_info("enumerate '%s'", subsystem == NULL ? "<all>" : subsystem); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_match_subsystem(udev_enumerate, subsystem); udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'net' + duplicated scan + null + zero"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_match_subsystem(udev_enumerate, "net"); udev_enumerate_scan_devices(udev_enumerate); udev_enumerate_scan_devices(udev_enumerate); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/null"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); udev_enumerate_add_syspath(udev_enumerate, "/sys/class/mem/zero"); udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'block'"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_match_subsystem(udev_enumerate,"block"); r = udev_enumerate_add_match_is_initialized(udev_enumerate); if (r < 0) { udev_enumerate_unref(udev_enumerate); return r; } udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'not block'"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'pci, mem, vc'"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_match_subsystem(udev_enumerate, "pci"); udev_enumerate_add_match_subsystem(udev_enumerate, "mem"); udev_enumerate_add_match_subsystem(udev_enumerate, "vc"); udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'subsystem'"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_scan_subsystems(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); log_info("enumerate 'property IF_FS_*=filesystem'"); udev_enumerate = udev_enumerate_new(udev); if (!udev_enumerate) return -1; udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem"); udev_enumerate_scan_devices(udev_enumerate); enumerate_print_list(udev_enumerate); udev_enumerate_unref(udev_enumerate); return 0; } static void test_hwdb(struct udev *udev, const char *modalias) { struct udev_hwdb *hwdb; struct udev_list_entry *entry; log_info("/* %s */", __func__); hwdb = udev_hwdb_new(udev); if (!hwdb) log_warning_errno(errno, "Failed to open hwdb: %m"); SAVE_ASSERT_RETURN_IS_CRITICAL; log_set_assert_return_is_critical(hwdb); udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0)) log_info("'%s'='%s'", udev_list_entry_get_name(entry), udev_list_entry_get_value(entry)); hwdb = udev_hwdb_unref(hwdb); assert_se(hwdb == NULL); } static void test_list(void) { _cleanup_(udev_list_freep) struct udev_list *list = NULL; struct udev_list_entry *e; /* empty list */ assert_se(list = udev_list_new(false)); assert_se(!udev_list_get_entry(list)); list = udev_list_free(list); /* unique == false */ assert_se(list = udev_list_new(false)); assert_se(udev_list_entry_add(list, "aaa", "hoge")); assert_se(udev_list_entry_add(list, "aaa", "hogehoge")); assert_se(udev_list_entry_add(list, "bbb", "foo")); e = udev_list_get_entry(list); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "aaa")); assert_se(streq_ptr(udev_list_entry_get_value(e), "hoge")); e = udev_list_entry_get_next(e); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "aaa")); assert_se(streq_ptr(udev_list_entry_get_value(e), "hogehoge")); e = udev_list_entry_get_next(e); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "bbb")); assert_se(streq_ptr(udev_list_entry_get_value(e), "foo")); assert_se(!udev_list_entry_get_next(e)); assert_se(!udev_list_entry_get_by_name(e, "aaa")); assert_se(!udev_list_entry_get_by_name(e, "bbb")); assert_se(!udev_list_entry_get_by_name(e, "ccc")); list = udev_list_free(list); /* unique == true */ assert_se(list = udev_list_new(true)); assert_se(udev_list_entry_add(list, "aaa", "hoge")); assert_se(udev_list_entry_add(list, "aaa", "hogehoge")); assert_se(udev_list_entry_add(list, "bbb", "foo")); e = udev_list_get_entry(list); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "aaa")); assert_se(streq_ptr(udev_list_entry_get_value(e), "hogehoge")); e = udev_list_entry_get_next(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "bbb")); assert_se(streq_ptr(udev_list_entry_get_value(e), "foo")); assert_se(!udev_list_entry_get_next(e)); e = udev_list_entry_get_by_name(e, "bbb"); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "bbb")); assert_se(streq_ptr(udev_list_entry_get_value(e), "foo")); e = udev_list_entry_get_by_name(e, "aaa"); assert_se(e); assert_se(streq_ptr(udev_list_entry_get_name(e), "aaa")); assert_se(streq_ptr(udev_list_entry_get_value(e), "hogehoge")); assert_se(!udev_list_entry_get_by_name(e, "ccc")); } static int parse_args(int argc, char *argv[], const char **syspath, const char **subsystem) { static const struct option options[] = { { "syspath", required_argument, NULL, 'p' }, { "subsystem", required_argument, NULL, 's' }, { "debug", no_argument, NULL, 'd' }, { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, { "monitor", no_argument, NULL, 'm' }, {} }; int c; while ((c = getopt_long(argc, argv, "p:s:dhVm", options, NULL)) >= 0) switch (c) { case 'p': *syspath = optarg; break; case 's': *subsystem = optarg; break; case 'd': log_set_max_level(LOG_DEBUG); break; case 'h': printf("--debug --syspath= --subsystem= --help\n"); return 0; case 'V': printf("%s\n", GIT_VERSION); return 0; case 'm': arg_monitor = true; break; case '?': return -EINVAL; default: assert_not_reached(); } return 1; } static int run(int argc, char *argv[]) { _cleanup_(udev_unrefp) struct udev *udev = NULL; const char *syspath = "/devices/virtual/mem/null"; const char *subsystem = NULL; int r; test_setup_logging(LOG_INFO); r = parse_args(argc, argv, &syspath, &subsystem); if (r <= 0) return r; assert_se(udev = udev_new()); /* add sys path if needed */ if (!startswith(syspath, "/sys")) syspath = strjoina("/sys/", syspath); test_device(udev, syspath); test_device_devnum(udev); test_device_subsys_name(udev, "block", "sda"); test_device_subsys_name(udev, "subsystem", "pci"); test_device_subsys_name(udev, "drivers", "scsi:sd"); test_device_subsys_name(udev, "module", "printk"); test_device_parents(udev, syspath); test_enumerate(udev, subsystem); test_queue(udev); test_hwdb(udev, "usb:v0D50p0011*"); if (arg_monitor) test_monitor(udev); test_list(); return 0; } DEFINE_MAIN_FUNCTION(run);