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Diffstat (limited to 'src/test/test-libudev.c')
| -rw-r--r-- | src/test/test-libudev.c | 433 |
1 files changed, 433 insertions, 0 deletions
diff --git a/src/test/test-libudev.c b/src/test/test-libudev.c new file mode 100644 index 0000000000..a76fbc3877 --- /dev/null +++ b/src/test/test-libudev.c @@ -0,0 +1,433 @@ +/*** + This file is part of systemd. + + Copyright 2008-2012 Kay Sievers <kay@vrfy.org> + + systemd is free software; you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published by + the Free Software Foundation; either version 2.1 of the License, or + (at your option) any later version. + + systemd is distributed in the hope that it will be useful, but + WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public License + along with systemd; If not, see <http://www.gnu.org/licenses/>. +***/ + +#include <getopt.h> +#include <stdio.h> +#include <sys/epoll.h> +#include <unistd.h> + +#include <libudev.h> + +#include "systemd-basic/fd-util.h" +#include "systemd-basic/log.h" +#include "systemd-basic/stdio-util.h" +#include "systemd-basic/string-util.h" +#include "systemd-basic/util.h" +#include "systemd-shared/udev-util.h" + +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 != NULL) + 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 != NULL) + log_info("sysnum: '%s'", str); + + str = udev_device_get_devpath(device); + log_info("devpath: '%s'", str); + + str = udev_device_get_subsystem(device); + if (str != NULL) + log_info("subsystem: '%s'", str); + + str = udev_device_get_devtype(device); + if (str != NULL) + log_info("devtype: '%s'", str); + + str = udev_device_get_driver(device); + if (str != NULL) + log_info("driver: '%s'", str); + + str = udev_device_get_devnode(device); + if (str != NULL) + 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 != NULL) + log_info("MAJOR: '%s'", str); + + str = udev_device_get_sysattr_value(device, "dev"); + if (str != NULL) + log_info("attr{dev}: '%s'", str); +} + +static void test_device(struct udev *udev, const char *syspath) { + _cleanup_udev_device_unref_ struct udev_device *device; + + log_info("looking at device: %s", syspath); + device = udev_device_new_from_syspath(udev, syspath); + if (device == NULL) + log_warning_errno(errno, "udev_device_new_from_syspath: %m"); + else + print_device(device); +} + +static void test_device_parents(struct udev *udev, const char *syspath) { + _cleanup_udev_device_unref_ struct udev_device *device; + struct udev_device *device_parent; + + log_info("looking at device: %s", syspath); + device = udev_device_new_from_syspath(udev, syspath); + if (device == NULL) + 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_unref_ struct udev_device *device; + + log_info("looking up device: %u:%u", major(devnum), minor(devnum)); + device = udev_device_new_from_devnum(udev, 'c', devnum); + if (device == NULL) + log_warning_errno(errno, "udev_device_new_from_devnum: %m"); + else + print_device(device); +} + +static void test_device_subsys_name(struct udev *udev, const char *subsys, const char *dev) { + _cleanup_udev_device_unref_ 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 == NULL) + log_warning_errno(errno, "udev_device_new_from_subsystem_sysname: %m"); + else + print_device(device); +} + +static int test_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 != NULL) { + 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_unref_ struct udev_monitor *udev_monitor; + _cleanup_close_ int fd_ep; + int fd_udev; + struct epoll_event ep_udev = { + .events = EPOLLIN, + }, ep_stdin = { + .events = EPOLLIN, + .data.fd = STDIN_FILENO, + }; + + 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 == NULL) { + 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; + + udev_queue = udev_queue_new(udev); + assert_se(udev_queue); + + 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("enumerate '%s'", subsystem == NULL ? "<all>" : subsystem); + udev_enumerate = udev_enumerate_new(udev); + if (udev_enumerate == NULL) + return -1; + udev_enumerate_add_match_subsystem(udev_enumerate, subsystem); + udev_enumerate_scan_devices(udev_enumerate); + test_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 == NULL) + 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); + test_enumerate_print_list(udev_enumerate); + udev_enumerate_unref(udev_enumerate); + + log_info("enumerate 'block'"); + udev_enumerate = udev_enumerate_new(udev); + if (udev_enumerate == NULL) + 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); + test_enumerate_print_list(udev_enumerate); + udev_enumerate_unref(udev_enumerate); + + log_info("enumerate 'not block'"); + udev_enumerate = udev_enumerate_new(udev); + if (udev_enumerate == NULL) + return -1; + udev_enumerate_add_nomatch_subsystem(udev_enumerate, "block"); + udev_enumerate_scan_devices(udev_enumerate); + test_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 == NULL) + 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); + test_enumerate_print_list(udev_enumerate); + udev_enumerate_unref(udev_enumerate); + + log_info("enumerate 'subsystem'"); + udev_enumerate = udev_enumerate_new(udev); + if (udev_enumerate == NULL) + return -1; + udev_enumerate_scan_subsystems(udev_enumerate); + test_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 == NULL) + return -1; + udev_enumerate_add_match_property(udev_enumerate, "ID_FS*", "filesystem"); + udev_enumerate_scan_devices(udev_enumerate); + test_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; + + hwdb = udev_hwdb_new(udev); + + 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); +} + +int main(int argc, char *argv[]) { + _cleanup_udev_unref_ struct udev *udev = NULL; + bool arg_monitor = false; + 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' }, + {} + }; + const char *syspath = "/devices/virtual/mem/null"; + const char *subsystem = NULL; + int c; + + udev = udev_new(); + log_info("context: %p", udev); + if (udev == NULL) { + log_info("no context"); + return 1; + } + + while ((c = getopt_long(argc, argv, "p:s:dhV", options, NULL)) >= 0) + switch (c) { + + case 'p': + syspath = optarg; + break; + + case 's': + subsystem = optarg; + break; + + case 'd': + if (log_get_max_level() < LOG_INFO) + log_set_max_level(LOG_INFO); + break; + + case 'h': + printf("--debug --syspath= --subsystem= --help\n"); + return EXIT_SUCCESS; + + case 'V': + printf("%s\n", VERSION); + return EXIT_SUCCESS; + + case 'm': + arg_monitor = true; + break; + + case '?': + return EXIT_FAILURE; + + default: + assert_not_reached("Unhandled option code."); + } + + + /* 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); + + return EXIT_SUCCESS; +} |