diff options
Diffstat (limited to 'src/libsystemd-terminal/evcat.c')
| -rw-r--r-- | src/libsystemd-terminal/evcat.c | 488 |
1 files changed, 0 insertions, 488 deletions
diff --git a/src/libsystemd-terminal/evcat.c b/src/libsystemd-terminal/evcat.c deleted file mode 100644 index 2aeefc2e16..0000000000 --- a/src/libsystemd-terminal/evcat.c +++ /dev/null @@ -1,488 +0,0 @@ -/*-*- 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 <termios.h> -#include <unistd.h> -#include <xkbcommon/xkbcommon.h> -#include "sd-bus.h" -#include "sd-event.h" -#include "sd-login.h" -#include "build.h" -#include "event-util.h" -#include "macro.h" -#include "signal-util.h" -#include "util.h" -#include "idev.h" -#include "sysview.h" -#include "term-internal.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, NULL, 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; -} |