+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
-
- 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/>.
-***/
-
-/*
- * Event Catenation
- * The evcat tool catenates input events of all requested devices and prints
- * them to standard-output. It's only meant for debugging of input-related
- * problems.
- */
-
-#include <errno.h>
-#include <getopt.h>
-#include <libevdev/libevdev.h>
-#include <linux/kd.h>
-#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/ioctl.h>
-#include <sys/stat.h>
-#include <systemd/sd-bus.h>
-#include <systemd/sd-event.h>
-#include <systemd/sd-login.h>
-#include <termios.h>
-#include <unistd.h>
-#include <xkbcommon/xkbcommon.h>
-#include "build.h"
-#include "event-util.h"
-#include "idev.h"
-#include "macro.h"
-#include "sysview.h"
-#include "term-internal.h"
-#include "util.h"
-
-typedef struct Evcat Evcat;
-
-struct Evcat {
- char *session;
- char *seat;
- sd_event *event;
- sd_bus *bus;
- sysview_context *sysview;
- idev_context *idev;
- idev_session *idev_session;
-
- bool managed : 1;
-};
-
-static Evcat *evcat_free(Evcat *e) {
- if (!e)
- return NULL;
-
- e->idev_session = idev_session_free(e->idev_session);
- e->idev = idev_context_unref(e->idev);
- e->sysview = sysview_context_free(e->sysview);
- e->bus = sd_bus_unref(e->bus);
- e->event = sd_event_unref(e->event);
- free(e->seat);
- free(e->session);
- free(e);
-
- tcflush(0, TCIOFLUSH);
-
- return NULL;
-}
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(Evcat*, evcat_free);
-
-static bool is_managed(const char *session) {
- unsigned int vtnr;
- struct stat st;
- long mode;
- int r;
-
- /* Using logind's Controller API is highly fragile if there is already
- * a session controller running. If it is registered as controller
- * itself, TakeControl will simply fail. But if its a legacy controller
- * that does not use logind's controller API, we must never register
- * our own controller. Otherwise, we really mess up the VT. Therefore,
- * only run in managed mode if there's no-one else. */
-
- if (geteuid() == 0)
- return false;
-
- if (!isatty(1))
- return false;
-
- if (!session)
- return false;
-
- r = sd_session_get_vt(session, &vtnr);
- if (r < 0 || vtnr < 1 || vtnr > 63)
- return false;
-
- mode = 0;
- r = ioctl(1, KDGETMODE, &mode);
- if (r < 0 || mode != KD_TEXT)
- return false;
-
- r = fstat(1, &st);
- if (r < 0 || minor(st.st_rdev) != vtnr)
- return false;
-
- return true;
-}
-
-static int evcat_new(Evcat **out) {
- _cleanup_(evcat_freep) Evcat *e = NULL;
- int r;
-
- assert(out);
-
- e = new0(Evcat, 1);
- if (!e)
- return log_oom();
-
- r = sd_pid_get_session(getpid(), &e->session);
- if (r < 0)
- return log_error_errno(r, "Cannot retrieve logind session: %m");
-
- r = sd_session_get_seat(e->session, &e->seat);
- if (r < 0)
- return log_error_errno(r, "Cannot retrieve seat of logind session: %m");
-
- e->managed = is_managed(e->session);
-
- r = sd_event_default(&e->event);
- if (r < 0)
- return r;
-
- r = sd_bus_open_system(&e->bus);
- if (r < 0)
- return r;
-
- r = sd_bus_attach_event(e->bus, e->event, SD_EVENT_PRIORITY_NORMAL);
- if (r < 0)
- return r;
-
- r = sigprocmask_many(SIG_BLOCK, SIGTERM, SIGINT, -1);
- if (r < 0)
- return r;
-
- r = sd_event_add_signal(e->event, NULL, SIGTERM, NULL, NULL);
- if (r < 0)
- return r;
-
- r = sd_event_add_signal(e->event, NULL, SIGINT, NULL, NULL);
- if (r < 0)
- return r;
-
- r = sysview_context_new(&e->sysview,
- SYSVIEW_CONTEXT_SCAN_LOGIND |
- SYSVIEW_CONTEXT_SCAN_EVDEV,
- e->event,
- e->bus,
- NULL);
- if (r < 0)
- return r;
-
- r = idev_context_new(&e->idev, e->event, e->bus);
- if (r < 0)
- return r;
-
- *out = e;
- e = NULL;
- return 0;
-}
-
-static void kdata_print(idev_data *data) {
- idev_data_keyboard *k = &data->keyboard;
- char buf[128];
- uint32_t i, c;
- int cwidth;
-
- /* Key-press state: UP/DOWN/REPEAT */
- printf(" %-6s", k->value == 0 ? "UP" :
- k->value == 1 ? "DOWN" :
- "REPEAT");
-
- /* Resync state */
- printf(" | %-6s", data->resync ? "RESYNC" : "");
-
- /* Keycode that triggered the event */
- printf(" | %5u", (unsigned)k->keycode);
-
- /* Well-known name of the keycode */
- printf(" | %-20s", libevdev_event_code_get_name(EV_KEY, k->keycode) ? : "<unknown>");
-
- /* Well-known modifiers */
- printf(" | %-5s", (k->mods & IDEV_KBDMOD_SHIFT) ? "SHIFT" : "");
- printf(" %-4s", (k->mods & IDEV_KBDMOD_CTRL) ? "CTRL" : "");
- printf(" %-3s", (k->mods & IDEV_KBDMOD_ALT) ? "ALT" : "");
- printf(" %-5s", (k->mods & IDEV_KBDMOD_LINUX) ? "LINUX" : "");
- printf(" %-4s", (k->mods & IDEV_KBDMOD_CAPS) ? "CAPS" : "");
-
- /* Consumed modifiers */
- printf(" | %-5s", (k->consumed_mods & IDEV_KBDMOD_SHIFT) ? "SHIFT" : "");
- printf(" %-4s", (k->consumed_mods & IDEV_KBDMOD_CTRL) ? "CTRL" : "");
- printf(" %-3s", (k->consumed_mods & IDEV_KBDMOD_ALT) ? "ALT" : "");
- printf(" %-5s", (k->consumed_mods & IDEV_KBDMOD_LINUX) ? "LINUX" : "");
- printf(" %-4s", (k->consumed_mods & IDEV_KBDMOD_CAPS) ? "CAPS" : "");
-
- /* Resolved symbols */
- printf(" |");
- for (i = 0; i < k->n_syms; ++i) {
- buf[0] = 0;
- xkb_keysym_get_name(k->keysyms[i], buf, sizeof(buf));
-
- if (is_locale_utf8()) {
- c = k->codepoints[i];
- if (c < 0x110000 && c > 0x20 && (c < 0x7f || c > 0x9f)) {
- /* "%4lc" doesn't work well, so hard-code it */
- cwidth = mk_wcwidth(c);
- while (cwidth++ < 2)
- printf(" ");
-
- printf(" '%lc':", (wchar_t)c);
- } else {
- printf(" ");
- }
- }
-
- printf(" XKB_KEY_%-30s", buf);
- }
-
- printf("\n");
-}
-
-static bool kdata_is_exit(idev_data *data) {
- idev_data_keyboard *k = &data->keyboard;
-
- if (k->value != 1)
- return false;
- if (k->n_syms != 1)
- return false;
-
- return k->codepoints[0] == 'q';
-}
-
-static int evcat_idev_fn(idev_session *session, void *userdata, idev_event *ev) {
- Evcat *e = userdata;
-
- switch (ev->type) {
- case IDEV_EVENT_DEVICE_ADD:
- idev_device_enable(ev->device_add.device);
- break;
- case IDEV_EVENT_DEVICE_REMOVE:
- idev_device_disable(ev->device_remove.device);
- break;
- case IDEV_EVENT_DEVICE_DATA:
- switch (ev->device_data.data.type) {
- case IDEV_DATA_KEYBOARD:
- if (kdata_is_exit(&ev->device_data.data))
- sd_event_exit(e->event, 0);
- else
- kdata_print(&ev->device_data.data);
-
- break;
- }
-
- break;
- }
-
- return 0;
-}
-
-static int evcat_sysview_fn(sysview_context *c, void *userdata, sysview_event *ev) {
- unsigned int flags, type;
- Evcat *e = userdata;
- sysview_device *d;
- const char *name;
- int r;
-
- switch (ev->type) {
- case SYSVIEW_EVENT_SESSION_FILTER:
- if (streq_ptr(e->session, ev->session_filter.id))
- return 1;
-
- break;
- case SYSVIEW_EVENT_SESSION_ADD:
- assert(!e->idev_session);
-
- name = sysview_session_get_name(ev->session_add.session);
- flags = 0;
-
- if (e->managed)
- flags |= IDEV_SESSION_MANAGED;
-
- r = idev_session_new(&e->idev_session,
- e->idev,
- flags,
- name,
- evcat_idev_fn,
- e);
- if (r < 0)
- return log_error_errno(r, "Cannot create idev session: %m");
-
- if (e->managed) {
- r = sysview_session_take_control(ev->session_add.session);
- if (r < 0)
- return log_error_errno(r, "Cannot request session control: %m");
- }
-
- idev_session_enable(e->idev_session);
-
- break;
- case SYSVIEW_EVENT_SESSION_REMOVE:
- idev_session_disable(e->idev_session);
- e->idev_session = idev_session_free(e->idev_session);
- if (sd_event_get_exit_code(e->event, &r) == -ENODATA)
- sd_event_exit(e->event, 0);
- break;
- case SYSVIEW_EVENT_SESSION_ATTACH:
- d = ev->session_attach.device;
- type = sysview_device_get_type(d);
- if (type == SYSVIEW_DEVICE_EVDEV) {
- r = idev_session_add_evdev(e->idev_session, sysview_device_get_ud(d));
- if (r < 0)
- return log_error_errno(r, "Cannot add evdev device to idev: %m");
- }
-
- break;
- case SYSVIEW_EVENT_SESSION_DETACH:
- d = ev->session_detach.device;
- type = sysview_device_get_type(d);
- if (type == SYSVIEW_DEVICE_EVDEV) {
- r = idev_session_remove_evdev(e->idev_session, sysview_device_get_ud(d));
- if (r < 0)
- return log_error_errno(r, "Cannot remove evdev device from idev: %m");
- }
-
- break;
- case SYSVIEW_EVENT_SESSION_CONTROL:
- r = ev->session_control.error;
- if (r < 0)
- return log_error_errno(r, "Cannot acquire session control: %m");
-
- r = ioctl(1, KDSKBMODE, K_UNICODE);
- if (r < 0)
- return log_error_errno(errno, "Cannot set K_UNICODE on stdout: %m");
-
- r = ioctl(1, KDSETMODE, KD_TEXT);
- if (r < 0)
- return log_error_errno(errno, "Cannot set KD_TEXT on stdout: %m");
-
- printf("\n");
-
- break;
- }
-
- return 0;
-}
-
-static int evcat_run(Evcat *e) {
- struct termios in_attr, saved_attr;
- int r;
-
- assert(e);
-
- if (!e->managed && geteuid() > 0)
- log_warning("You run in unmanaged mode without being root. This is likely to produce no output..");
-
- printf("evcat - Read and catenate events from selected input devices\n"
- " Running on seat '%s' in user-session '%s'\n"
- " Exit by pressing ^C or 'q'\n\n",
- e->seat ? : "seat0", e->session ? : "<none>");
-
- r = sysview_context_start(e->sysview, evcat_sysview_fn, e);
- if (r < 0)
- goto out;
-
- r = tcgetattr(0, &in_attr);
- if (r < 0) {
- r = -errno;
- goto out;
- }
-
- saved_attr = in_attr;
- in_attr.c_lflag &= ~ECHO;
-
- r = tcsetattr(0, TCSANOW, &in_attr);
- if (r < 0) {
- r = -errno;
- goto out;
- }
-
- r = sd_event_loop(e->event);
- tcsetattr(0, TCSANOW, &saved_attr);
- printf("exiting..\n");
-
-out:
- sysview_context_stop(e->sysview);
- return r;
-}
-
-static int help(void) {
- printf("%s [OPTIONS...]\n\n"
- "Read and catenate events from selected input devices.\n\n"
- " -h --help Show this help\n"
- " --version Show package version\n"
- , program_invocation_short_name);
-
- return 0;
-}
-
-static int parse_argv(int argc, char *argv[]) {
- enum {
- ARG_VERSION = 0x100,
- };
- static const struct option options[] = {
- { "help", no_argument, NULL, 'h' },
- { "version", no_argument, NULL, ARG_VERSION },
- {},
- };
- int c;
-
- assert(argc >= 0);
- assert(argv);
-
- while ((c = getopt_long(argc, argv, "h", options, NULL)) >= 0)
- switch (c) {
- case 'h':
- help();
- return 0;
-
- case ARG_VERSION:
- puts(PACKAGE_STRING);
- puts(SYSTEMD_FEATURES);
- return 0;
-
- case '?':
- return -EINVAL;
-
- default:
- assert_not_reached("Unhandled option");
- }
-
- if (argc > optind) {
- log_error("Too many arguments");
- return -EINVAL;
- }
-
- return 1;
-}
-
-int main(int argc, char *argv[]) {
- _cleanup_(evcat_freep) Evcat *e = NULL;
- int r;
-
- log_set_target(LOG_TARGET_AUTO);
- log_parse_environment();
- log_open();
-
- setlocale(LC_ALL, "");
- if (!is_locale_utf8())
- log_warning("Locale is not set to UTF-8. Codepoints will not be printed!");
-
- r = parse_argv(argc, argv);
- if (r <= 0)
- goto finish;
-
- r = evcat_new(&e);
- if (r < 0)
- goto finish;
-
- r = evcat_run(e);
-
-finish:
- return r < 0 ? EXIT_FAILURE : EXIT_SUCCESS;
-}
~ianmdlvl / elogind.git / blobdiff