static int device_monitor_handler(sd_device_monitor *monitor, sd_device *device, void *userdata) { const char *action = NULL, *devpath = NULL, *subsystem = NULL; MonitorNetlinkGroup group = PTR_TO_INT(userdata); struct timespec ts; assert(device); assert(IN_SET(group, MONITOR_GROUP_UDEV, MONITOR_GROUP_KERNEL)); (void) sd_device_get_property_value(device, "ACTION", &action); (void) sd_device_get_devpath(device, &devpath); (void) sd_device_get_subsystem(device, &subsystem); assert_se(clock_gettime(CLOCK_MONOTONIC, &ts) == 0); printf("%-6s[%"PRI_TIME".%06"PRI_NSEC"] %-8s %s (%s)\n", group == MONITOR_GROUP_UDEV ? "UDEV" : "KERNEL", ts.tv_sec, (nsec_t)ts.tv_nsec/1000, action, devpath, subsystem); if (arg_show_property) { const char *key, *value; FOREACH_DEVICE_PROPERTY(device, key, value) printf("%s=%s\n", key, value); printf("\n"); } return 0; }
static int builtin_uaccess(sd_device *dev, int argc, char *argv[], bool test) { const char *path = NULL, *seat; bool changed_acl = false; uid_t uid; int r; umask(0022); /* don't muck around with ACLs when the system is not running systemd */ if (!logind_running()) return 0; r = sd_device_get_devname(dev, &path); if (r < 0) { log_device_error_errno(dev, r, "Failed to get device name: %m"); goto finish; } if (sd_device_get_property_value(dev, "ID_SEAT", &seat) < 0) seat = "seat0"; r = sd_seat_get_active(seat, NULL, &uid); if (r < 0) { if (IN_SET(r, -ENXIO, -ENODATA)) /* No active session on this seat */ r = 0; else log_device_error_errno(dev, r, "Failed to determine active user on seat %s: %m", seat); goto finish; } r = devnode_acl(path, true, false, 0, true, uid); if (r < 0) { log_device_full(dev, r == -ENOENT ? LOG_DEBUG : LOG_ERR, r, "Failed to apply ACL: %m"); goto finish; } changed_acl = true; r = 0; finish: if (path && !changed_acl) { int k; /* Better be safe than sorry and reset ACL */ k = devnode_acl(path, true, false, 0, false, 0); if (k < 0) { log_device_full(dev, k == -ENOENT ? LOG_DEBUG : LOG_ERR, k, "Failed to apply ACL: %m"); if (r >= 0) r = k; } } return r; }
int device_is_renaming(sd_device *dev) { int r; assert(dev); r = sd_device_get_property_value(dev, "ID_RENAMING", NULL); if (r < 0 && r != -ENOENT) return r; return r >= 0; }
/** * udev_device_get_action: * @udev_device: udev device * * This is only valid if the device was received through a monitor. Devices read from * sys do not have an action string. Usual actions are: add, remove, change, online, * offline. * * Returns: the kernel action value, or #NULL if there is no action value available. **/ _public_ const char *udev_device_get_action(struct udev_device *udev_device) { const char *action = NULL; int r; assert_return_errno(udev_device, NULL, EINVAL); r = sd_device_get_property_value(udev_device->device, "ACTION", &action); if (r < 0 && r != -ENOENT) { errno = -r; return NULL; } return action; }
const char *udev_device_get_devpath_old(struct udev_device *udev_device) { const char *devpath_old = NULL; int r; assert(udev_device); r = sd_device_get_property_value(udev_device->device, "DEVPATH_OLD", &devpath_old); if (r < 0 && r != -ENOENT) { errno = -r; return NULL; } return devpath_old; }
/** * udev_device_get_property_value: * @udev_device: udev device * @key: property name * * Get the value of a given property. * * Returns: the property string, or #NULL if there is no such property. **/ _public_ const char *udev_device_get_property_value(struct udev_device *udev_device, const char *key) { const char *value = NULL; int r; assert_return_errno(udev_device && key, NULL, EINVAL); r = sd_device_get_property_value(udev_device->device, key, &value); if (r < 0) { errno = -r; return NULL; } return value; }
/** * udev_device_get_seqnum: * @udev_device: udev device * * This is only valid if the device was received through a monitor. Devices read from * sys do not have a sequence number. * * Returns: the kernel event sequence number, or 0 if there is no sequence number available. **/ _public_ unsigned long long int udev_device_get_seqnum(struct udev_device *udev_device) { const char *seqnum; unsigned long long ret; int r; assert_return_errno(udev_device, 0, EINVAL); r = sd_device_get_property_value(udev_device->device, "SEQNUM", &seqnum); if (r == -ENOENT) return 0; else if (r < 0) { errno = -r; return 0; } r = safe_atollu(seqnum, &ret); if (r < 0) { errno = -r; return 0; } return ret; }
static int fsck_progress_socket(void) { static const union sockaddr_union sa = { .un.sun_family = AF_UNIX, .un.sun_path = "/run/systemd/fsck.progress", }; int fd, r; fd = socket(AF_UNIX, SOCK_STREAM, 0); if (fd < 0) return log_warning_errno(errno, "socket(): %m"); if (connect(fd, &sa.sa, SOCKADDR_UN_LEN(sa.un)) < 0) { r = log_full_errno(errno == ECONNREFUSED || errno == ENOENT ? LOG_DEBUG : LOG_WARNING, errno, "Failed to connect to progress socket %s, ignoring: %m", sa.un.sun_path); safe_close(fd); return r; } return fd; } int main(int argc, char *argv[]) { _cleanup_close_pair_ int progress_pipe[2] = { -1, -1 }; _cleanup_(sd_device_unrefp) sd_device *dev = NULL; const char *device, *type; bool root_directory; siginfo_t status; struct stat st; int r; pid_t pid; if (argc > 2) { log_error("This program expects one or no arguments."); return EXIT_FAILURE; } log_set_target(LOG_TARGET_AUTO); log_parse_environment(); log_open(); umask(0022); r = parse_proc_cmdline(parse_proc_cmdline_item); if (r < 0) log_warning_errno(r, "Failed to parse kernel command line, ignoring: %m"); test_files(); if (!arg_force && arg_skip) { r = 0; goto finish; } if (argc > 1) { device = argv[1]; if (stat(device, &st) < 0) { r = log_error_errno(errno, "Failed to stat %s: %m", device); goto finish; } if (!S_ISBLK(st.st_mode)) { log_error("%s is not a block device.", device); r = -EINVAL; goto finish; } r = sd_device_new_from_devnum(&dev, 'b', st.st_rdev); if (r < 0) { log_error_errno(r, "Failed to detect device %s: %m", device); goto finish; } root_directory = false; } else { struct timespec times[2]; /* Find root device */ if (stat("/", &st) < 0) { r = log_error_errno(errno, "Failed to stat() the root directory: %m"); goto finish; } /* Virtual root devices don't need an fsck */ if (major(st.st_dev) == 0) { log_debug("Root directory is virtual or btrfs, skipping check."); r = 0; goto finish; } /* check if we are already writable */ times[0] = st.st_atim; times[1] = st.st_mtim; if (utimensat(AT_FDCWD, "/", times, 0) == 0) { log_info("Root directory is writable, skipping check."); r = 0; goto finish; } r = sd_device_new_from_devnum(&dev, 'b', st.st_dev); if (r < 0) { log_error_errno(r, "Failed to detect root device: %m"); goto finish; } r = sd_device_get_devname(dev, &device); if (r < 0) { log_error_errno(r, "Failed to detect device node of root directory: %m"); goto finish; } root_directory = true; } r = sd_device_get_property_value(dev, "ID_FS_TYPE", &type); if (r >= 0) { r = fsck_exists(type); if (r < 0) log_warning_errno(r, "Couldn't detect if fsck.%s may be used for %s, proceeding: %m", type, device); else if (r == 0) { log_info("fsck.%s doesn't exist, not checking file system on %s.", type, device); goto finish; } } if (arg_show_progress) { if (pipe(progress_pipe) < 0) { r = log_error_errno(errno, "pipe(): %m"); goto finish; } } pid = fork(); if (pid < 0) { r = log_error_errno(errno, "fork(): %m"); goto finish; } if (pid == 0) { char dash_c[sizeof("-C")-1 + DECIMAL_STR_MAX(int) + 1]; int progress_socket = -1; const char *cmdline[9]; int i = 0; /* Child */ (void) reset_all_signal_handlers(); (void) reset_signal_mask(); assert_se(prctl(PR_SET_PDEATHSIG, SIGTERM) == 0); /* Close the reading side of the progress pipe */ progress_pipe[0] = safe_close(progress_pipe[0]); /* Try to connect to a progress management daemon, if there is one */ progress_socket = fsck_progress_socket(); if (progress_socket >= 0) { /* If this worked we close the progress pipe early, and just use the socket */ progress_pipe[1] = safe_close(progress_pipe[1]); xsprintf(dash_c, "-C%i", progress_socket); } else if (progress_pipe[1] >= 0) { /* Otherwise if we have the progress pipe to our own local handle, we use it */ xsprintf(dash_c, "-C%i", progress_pipe[1]); } else dash_c[0] = 0; cmdline[i++] = "/sbin/fsck"; cmdline[i++] = arg_repair; cmdline[i++] = "-T"; /* * Since util-linux v2.25 fsck uses /run/fsck/<diskname>.lock files. * The previous versions use flock for the device and conflict with * udevd, see https://bugs.freedesktop.org/show_bug.cgi?id=79576#c5 */ cmdline[i++] = "-l"; if (!root_directory) cmdline[i++] = "-M"; if (arg_force) cmdline[i++] = "-f"; if (!isempty(dash_c)) cmdline[i++] = dash_c; cmdline[i++] = device; cmdline[i++] = NULL; execv(cmdline[0], (char**) cmdline); _exit(FSCK_OPERATIONAL_ERROR); } progress_pipe[1] = safe_close(progress_pipe[1]); (void) process_progress(progress_pipe[0]); progress_pipe[0] = -1; r = wait_for_terminate(pid, &status); if (r < 0) { log_error_errno(r, "waitid(): %m"); goto finish; } if (status.si_code != CLD_EXITED || (status.si_status & ~1)) { if (status.si_code == CLD_KILLED || status.si_code == CLD_DUMPED) log_error("fsck terminated by signal %s.", signal_to_string(status.si_status)); else if (status.si_code == CLD_EXITED) log_error("fsck failed with error code %i.", status.si_status); else log_error("fsck failed due to unknown reason."); r = -EINVAL; if (status.si_code == CLD_EXITED && (status.si_status & FSCK_SYSTEM_SHOULD_REBOOT) && root_directory) /* System should be rebooted. */ start_target(SPECIAL_REBOOT_TARGET, "replace-irreversibly"); else if (status.si_code == CLD_EXITED && (status.si_status & (FSCK_SYSTEM_SHOULD_REBOOT | FSCK_ERRORS_LEFT_UNCORRECTED))) /* Some other problem */ start_target(SPECIAL_EMERGENCY_TARGET, "replace"); else { log_warning("Ignoring error."); r = 0; } } else r = 0; if (status.si_code == CLD_EXITED && (status.si_status & FSCK_ERROR_CORRECTED)) (void) touch("/run/systemd/quotacheck"); finish: return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS; }