terminal: implement term_init() and term_destroy()

This commit is contained in:
Daniel Eklöf 2019-10-28 18:25:19 +01:00
parent 957fb25559
commit 0979a0e2e5
No known key found for this signature in database
GPG key ID: 5BBD4992C116573F
3 changed files with 375 additions and 328 deletions

345
main.c
View file

@ -330,106 +330,10 @@ main(int argc, char *const *argv)
setlocale(LC_ALL, "");
setenv("TERM", conf.term, 1);
struct terminal term = {
.quit = false,
.ptmx = posix_openpt(O_RDWR | O_NOCTTY),
.cursor_keys_mode = CURSOR_KEYS_NORMAL,
.keypad_keys_mode = KEYPAD_NUMERICAL,
.auto_margin = true,
.window_title_stack = tll_init(),
.scale = 1,
.flash = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.blink = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.vt = {
.state = 1, /* STATE_GROUND */
},
.colors = {
.default_fg = conf.colors.fg,
.default_bg = conf.colors.bg,
.default_table = {
conf.colors.regular[0],
conf.colors.regular[1],
conf.colors.regular[2],
conf.colors.regular[3],
conf.colors.regular[4],
conf.colors.regular[5],
conf.colors.regular[6],
conf.colors.regular[7],
conf.colors.bright[0],
conf.colors.bright[1],
conf.colors.bright[2],
conf.colors.bright[3],
conf.colors.bright[4],
conf.colors.bright[5],
conf.colors.bright[6],
conf.colors.bright[7],
},
.alpha = conf.colors.alpha,
},
.default_cursor_style = conf.cursor.style,
.cursor_style = conf.cursor.style,
.default_cursor_color = {
.text = conf.cursor.color.text,
.cursor = conf.cursor.color.cursor,
},
.cursor_color = {
.text = conf.cursor.color.text,
.cursor = conf.cursor.color.cursor,
},
.selection = {
.start = {-1, -1},
.end = {-1, -1},
},
.normal = {.damage = tll_init(), .scroll_damage = tll_init()},
.alt = {.damage = tll_init(), .scroll_damage = tll_init()},
.grid = &term.normal,
.render = {
.scrollback_lines = conf.scrollback_lines,
.workers = {
.count = conf.render_worker_count,
.queue = tll_init(),
},
},
.delayed_render_timer = {
.is_armed = false,
.lower_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
.upper_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
},
};
LOG_INFO("using %zu rendering threads", term.render.workers.count);
struct render_worker_context worker_context[term.render.workers.count];
/* Initialize 'current' colors from the default colors */
term.colors.fg = term.colors.default_fg;
term.colors.bg = term.colors.default_bg;
/* Initialize the 256 gray-scale color cube */
{
/* First 16 entries have already been initialized from conf */
for (size_t r = 0; r < 6; r++) {
for (size_t g = 0; g < 6; g++) {
for (size_t b = 0; b < 6; b++) {
term.colors.default_table[16 + r * 6 * 6 + g * 6 + b]
= r * 51 << 16 | g * 51 << 8 | b * 51;
}
}
}
for (size_t i = 0; i < 24; i++)
term.colors.default_table[232 + i] = i * 11 << 16 | i * 11 << 8 | i * 11;
memcpy(term.colors.table, term.colors.default_table, sizeof(term.colors.table));
}
struct fdm *fdm = NULL;
struct wayland *wayl = NULL;
struct terminal *term = NULL;
if ((fdm = fdm_init()) == NULL)
goto out;
@ -437,256 +341,41 @@ main(int argc, char *const *argv)
if ((wayl = wayl_init(fdm)) == NULL)
goto out;
term.wl = wayl;
wayl->term = &term;
if (term.ptmx == -1) {
LOG_ERR("failed to open pseudo terminal");
goto out;
}
if (term.flash.fd == -1 || term.blink.fd == -1) {
LOG_ERR("failed to create timers");
goto out;
}
sem_init(&term.render.workers.start, 0, 0);
sem_init(&term.render.workers.done, 0, 0);
mtx_init(&term.render.workers.lock, mtx_plain);
cnd_init(&term.render.workers.cond);
term.render.workers.threads = calloc(term.render.workers.count, sizeof(term.render.workers.threads[0]));
for (size_t i = 0; i < term.render.workers.count; i++) {
worker_context[i].term = &term;
worker_context[i].my_id = 1 + i;
thrd_create(&term.render.workers.threads[i], &render_worker_thread, &worker_context[i]);
}
font_list_t font_names = tll_init();
tll_foreach(conf.fonts, it)
tll_push_back(font_names, it->item);
if ((term.fonts[0] = font_from_name(font_names, "")) == NULL) {
tll_free(font_names);
goto out;
}
term.fonts[1] = font_from_name(font_names, "style=bold");
term.fonts[2] = font_from_name(font_names, "style=italic");
term.fonts[3] = font_from_name(font_names, "style=bold italic");
tll_free(font_names);
{
FT_Face ft_face = term.fonts[0]->face;
int max_x_advance = ft_face->size->metrics.max_advance / 64;
int height = ft_face->size->metrics.height / 64;
int descent = ft_face->size->metrics.descender / 64;
int ascent = ft_face->size->metrics.ascender / 64;
term.fextents.height = height * term.fonts[0]->pixel_size_fixup;
term.fextents.descent = -descent * term.fonts[0]->pixel_size_fixup;
term.fextents.ascent = ascent * term.fonts[0]->pixel_size_fixup;
term.fextents.max_x_advance = max_x_advance * term.fonts[0]->pixel_size_fixup;
LOG_DBG("metrics: height: %d, descent: %d, ascent: %d, x-advance: %d",
height, descent, ascent, max_x_advance);
}
term.cell_width = (int)ceil(term.fextents.max_x_advance);
term.cell_height = (int)ceil(term.fextents.height);
LOG_INFO("cell width=%d, height=%d", term.cell_width, term.cell_height);
/* Main window */
term.window = wayl_win_init(wayl);
if (term.window == NULL)
if ((term = term_init(&conf, fdm, wayl, argc, argv)) == NULL)
goto out;
term_set_window_title(&term, "foot");
if (conf.width == -1) {
assert(conf.height == -1);
conf.width = 80 * term.cell_width;
conf.height = 24 * term.cell_height;
}
conf.width = max(conf.width, term.cell_width);
conf.height = max(conf.height, term.cell_height);
render_resize(&term, conf.width, conf.height);
{
int fork_pipe[2];
if (pipe2(fork_pipe, O_CLOEXEC) < 0) {
LOG_ERRNO("failed to create pipe");
goto out;
}
term.slave = fork();
switch (term.slave) {
case -1:
LOG_ERRNO("failed to fork");
close(fork_pipe[0]);
close(fork_pipe[1]);
goto out;
case 0:
/* Child */
close(fork_pipe[0]); /* Close read end */
char **_shell_argv = NULL;
char *const *shell_argv = argv;
if (argc == 0) {
if (!tokenize_cmdline(conf.shell, &_shell_argv)) {
(void)!write(fork_pipe[1], &errno, sizeof(errno));
_exit(0);
}
shell_argv = _shell_argv;
}
slave_spawn(term.ptmx, shell_argv, fork_pipe[1]);
assert(false);
break;
default: {
close(fork_pipe[1]); /* Close write end */
LOG_DBG("slave has PID %d", term.slave);
int _errno;
static_assert(sizeof(errno) == sizeof(_errno), "errno size mismatch");
ssize_t ret = read(fork_pipe[0], &_errno, sizeof(_errno));
close(fork_pipe[0]);
if (ret < 0) {
LOG_ERRNO("failed to read from pipe");
goto out;
} else if (ret == sizeof(_errno)) {
LOG_ERRNO(
"%s: failed to execute", argc == 0 ? conf.shell : argv[0]);
goto out;
} else
LOG_DBG("%s: successfully started", conf.shell);
break;
}
}
}
/* Read logic requires non-blocking mode */
{
int fd_flags = fcntl(term.ptmx, F_GETFL);
if (fd_flags == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
if (fcntl(term.ptmx, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
}
fdm_add(fdm, term.ptmx, EPOLLIN, &fdm_ptmx, &term);
fdm_add(fdm, term.flash.fd, EPOLLIN, &fdm_flash, &term);
fdm_add(fdm, term.blink.fd, EPOLLIN, &fdm_blink, &term);
fdm_add(fdm, term.delayed_render_timer.lower_fd, EPOLLIN, &fdm_delayed_render, &term);
fdm_add(fdm, term.delayed_render_timer.upper_fd, EPOLLIN, &fdm_delayed_render, &term);
fdm_add(fdm, term->ptmx, EPOLLIN, &fdm_ptmx, term);
fdm_add(fdm, term->flash.fd, EPOLLIN, &fdm_flash, term);
fdm_add(fdm, term->blink.fd, EPOLLIN, &fdm_blink, term);
fdm_add(fdm, term->delayed_render_timer.lower_fd, EPOLLIN, &fdm_delayed_render, term);
fdm_add(fdm, term->delayed_render_timer.upper_fd, EPOLLIN, &fdm_delayed_render, term);
while (true) {
wl_display_flush(term.wl->display); /* TODO: figure out how to get rid of this */
wl_display_flush(term->wl->display); /* TODO: figure out how to get rid of this */
if (!fdm_poll(fdm))
break;
}
if (term.quit)
if (term->quit)
ret = EXIT_SUCCESS;
out:
if (fdm != NULL) {
fdm_del(fdm, term.ptmx);
fdm_del(fdm, term.flash.fd);
fdm_del(fdm, term.blink.fd);
fdm_del(fdm, term.delayed_render_timer.lower_fd);
fdm_del(fdm, term.delayed_render_timer.upper_fd);
fdm_del(fdm, term->ptmx);
fdm_del(fdm, term->flash.fd);
fdm_del(fdm, term->blink.fd);
fdm_del(fdm, term->delayed_render_timer.lower_fd);
fdm_del(fdm, term->delayed_render_timer.upper_fd);
}
if (term.delayed_render_timer.lower_fd != -1)
close(term.delayed_render_timer.lower_fd);
if (term.delayed_render_timer.upper_fd != -1)
close(term.delayed_render_timer.upper_fd);
mtx_lock(&term.render.workers.lock);
assert(tll_length(term.render.workers.queue) == 0);
for (size_t i = 0; i < term.render.workers.count; i++) {
sem_post(&term.render.workers.start);
tll_push_back(term.render.workers.queue, -2);
}
cnd_broadcast(&term.render.workers.cond);
mtx_unlock(&term.render.workers.lock);
shm_fini();
wayl_win_destroy(term.window);
int child_ret = term_destroy(term);
wayl_destroy(wayl);
free(term.vt.osc.data);
for (int row = 0; row < term.normal.num_rows; row++)
grid_row_free(term.normal.rows[row]);
free(term.normal.rows);
for (int row = 0; row < term.alt.num_rows; row++)
grid_row_free(term.alt.rows[row]);
free(term.alt.rows);
free(term.window_title);
tll_free_and_free(term.window_title_stack, free);
for (size_t i = 0; i < sizeof(term.fonts) / sizeof(term.fonts[0]); i++)
font_destroy(term.fonts[i]);
free(term.search.buf);
if (term.flash.fd != -1)
close(term.flash.fd);
if (term.blink.fd != -1)
close(term.blink.fd);
if (term.ptmx != -1)
close(term.ptmx);
for (size_t i = 0; i < term.render.workers.count; i++)
thrd_join(term.render.workers.threads[i], NULL);
free(term.render.workers.threads);
cnd_destroy(&term.render.workers.cond);
mtx_destroy(&term.render.workers.lock);
sem_destroy(&term.render.workers.start);
sem_destroy(&term.render.workers.done);
assert(tll_length(term.render.workers.queue) == 0);
tll_free(term.render.workers.queue);
if (term.slave > 0) {
/* Note: we've closed ptmx, so the slave *should* exit... */
int status;
waitpid(term.slave, &status, 0);
int child_ret = EXIT_FAILURE;
if (WIFEXITED(status)) {
child_ret = WEXITSTATUS(status);
LOG_DBG("slave exited with code %d", child_ret);
} else if (WIFSIGNALED(status)) {
child_ret = WTERMSIG(status);
LOG_WARN("slave exited with signal %d", child_ret);
} else {
LOG_WARN("slave exited for unknown reason (status = 0x%08x)", status);
}
if (ret == EXIT_SUCCESS)
ret = child_ret;
}
fdm_destroy(fdm);
config_free(conf);
return ret;
return ret == EXIT_SUCCESS ? child_ret : ret;
}

View file

@ -3,8 +3,12 @@
#include <string.h>
#include <unistd.h>
#include <assert.h>
#include <errno.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <sys/timerfd.h>
#include <fcntl.h>
#include <linux/input-event-codes.h>
#define LOG_MODULE "terminal"
@ -14,10 +18,354 @@
#include "render.h"
#include "vt.h"
#include "selection.h"
#include "config.h"
#include "tokenize.h"
#include "slave.h"
#define min(x, y) ((x) < (y) ? (x) : (y))
#define max(x, y) ((x) > (y) ? (x) : (y))
struct terminal *
term_init(const struct config *conf, struct fdm *fdm, struct wayland *wayl,
int argc, char *const *argv)
{
struct terminal *term = malloc(sizeof(*term));
*term = (struct terminal) {
.fdm = fdm,
.quit = false,
.ptmx = posix_openpt(O_RDWR | O_NOCTTY),
.cursor_keys_mode = CURSOR_KEYS_NORMAL,
.keypad_keys_mode = KEYPAD_NUMERICAL,
.auto_margin = true,
.window_title_stack = tll_init(),
.scale = 1,
.flash = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.blink = {
.fd = timerfd_create(CLOCK_BOOTTIME, TFD_CLOEXEC | TFD_NONBLOCK),
},
.vt = {
.state = 1, /* STATE_GROUND */
},
.colors = {
.default_fg = conf->colors.fg,
.default_bg = conf->colors.bg,
.default_table = {
conf->colors.regular[0],
conf->colors.regular[1],
conf->colors.regular[2],
conf->colors.regular[3],
conf->colors.regular[4],
conf->colors.regular[5],
conf->colors.regular[6],
conf->colors.regular[7],
conf->colors.bright[0],
conf->colors.bright[1],
conf->colors.bright[2],
conf->colors.bright[3],
conf->colors.bright[4],
conf->colors.bright[5],
conf->colors.bright[6],
conf->colors.bright[7],
},
.alpha = conf->colors.alpha,
},
.default_cursor_style = conf->cursor.style,
.cursor_style = conf->cursor.style,
.default_cursor_color = {
.text = conf->cursor.color.text,
.cursor = conf->cursor.color.cursor,
},
.cursor_color = {
.text = conf->cursor.color.text,
.cursor = conf->cursor.color.cursor,
},
.selection = {
.start = {-1, -1},
.end = {-1, -1},
},
.normal = {.damage = tll_init(), .scroll_damage = tll_init()},
.alt = {.damage = tll_init(), .scroll_damage = tll_init()},
.grid = &term->normal,
.wl = wayl,
.render = {
.scrollback_lines = conf->scrollback_lines,
.workers = {
.count = conf->render_worker_count,
.queue = tll_init(),
},
},
.delayed_render_timer = {
.is_armed = false,
.lower_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
.upper_fd = timerfd_create(CLOCK_REALTIME, TFD_NONBLOCK | TFD_CLOEXEC),
},
};
LOG_INFO("using %zu rendering threads", term->render.workers.count);
struct render_worker_context worker_context[term->render.workers.count];
/* Initialize 'current' colors from the default colors */
term->colors.fg = term->colors.default_fg;
term->colors.bg = term->colors.default_bg;
/* Initialize the 256 gray-scale color cube */
{
/* First 16 entries have already been initialized from conf */
for (size_t r = 0; r < 6; r++) {
for (size_t g = 0; g < 6; g++) {
for (size_t b = 0; b < 6; b++) {
term->colors.default_table[16 + r * 6 * 6 + g * 6 + b]
= r * 51 << 16 | g * 51 << 8 | b * 51;
}
}
}
for (size_t i = 0; i < 24; i++)
term->colors.default_table[232 + i] = i * 11 << 16 | i * 11 << 8 | i * 11;
memcpy(term->colors.table, term->colors.default_table, sizeof(term->colors.table));
}
if (term->ptmx == -1) {
LOG_ERR("failed to open pseudo terminal");
goto out;
}
if (term->flash.fd == -1 || term->blink.fd == -1) {
LOG_ERR("failed to create timers");
goto out;
}
sem_init(&term->render.workers.start, 0, 0);
sem_init(&term->render.workers.done, 0, 0);
mtx_init(&term->render.workers.lock, mtx_plain);
cnd_init(&term->render.workers.cond);
term->render.workers.threads = calloc(term->render.workers.count, sizeof(term->render.workers.threads[0]));
for (size_t i = 0; i < term->render.workers.count; i++) {
worker_context[i].term = term;
worker_context[i].my_id = 1 + i;
thrd_create(&term->render.workers.threads[i], &render_worker_thread, &worker_context[i]);
}
font_list_t font_names = tll_init();
tll_foreach(conf->fonts, it)
tll_push_back(font_names, it->item);
if ((term->fonts[0] = font_from_name(font_names, "")) == NULL) {
tll_free(font_names);
goto out;
}
term->fonts[1] = font_from_name(font_names, "style=bold");
term->fonts[2] = font_from_name(font_names, "style=italic");
term->fonts[3] = font_from_name(font_names, "style=bold italic");
tll_free(font_names);
{
FT_Face ft_face = term->fonts[0]->face;
int max_x_advance = ft_face->size->metrics.max_advance / 64;
int height = ft_face->size->metrics.height / 64;
int descent = ft_face->size->metrics.descender / 64;
int ascent = ft_face->size->metrics.ascender / 64;
term->fextents.height = height * term->fonts[0]->pixel_size_fixup;
term->fextents.descent = -descent * term->fonts[0]->pixel_size_fixup;
term->fextents.ascent = ascent * term->fonts[0]->pixel_size_fixup;
term->fextents.max_x_advance = max_x_advance * term->fonts[0]->pixel_size_fixup;
LOG_DBG("metrics: height: %d, descent: %d, ascent: %d, x-advance: %d",
height, descent, ascent, max_x_advance);
}
term->cell_width = (int)ceil(term->fextents.max_x_advance);
term->cell_height = (int)ceil(term->fextents.height);
LOG_INFO("cell width=%d, height=%d", term->cell_width, term->cell_height);
/* Main window */
term->window = wayl_win_init(wayl);
if (term->window == NULL)
goto out;
term_set_window_title(term, "foot");
unsigned width = conf->width;
unsigned height = conf->height;
if (width == -1) {
assert(height == -1);
width = 80 * term->cell_width;
height = 24 * term->cell_height;
}
width = max(width, term->cell_width);
height = max(height, term->cell_height);
render_resize(term, width, height);
{
int fork_pipe[2];
if (pipe2(fork_pipe, O_CLOEXEC) < 0) {
LOG_ERRNO("failed to create pipe");
goto out;
}
term->slave = fork();
switch (term->slave) {
case -1:
LOG_ERRNO("failed to fork");
close(fork_pipe[0]);
close(fork_pipe[1]);
goto out;
case 0:
/* Child */
close(fork_pipe[0]); /* Close read end */
char **_shell_argv = NULL;
char *const *shell_argv = argv;
if (argc == 0) {
if (!tokenize_cmdline(conf->shell, &_shell_argv)) {
(void)!write(fork_pipe[1], &errno, sizeof(errno));
_exit(0);
}
shell_argv = _shell_argv;
}
slave_spawn(term->ptmx, shell_argv, fork_pipe[1]);
assert(false);
break;
default: {
close(fork_pipe[1]); /* Close write end */
LOG_DBG("slave has PID %d", term->slave);
int _errno;
static_assert(sizeof(errno) == sizeof(_errno), "errno size mismatch");
ssize_t ret = read(fork_pipe[0], &_errno, sizeof(_errno));
close(fork_pipe[0]);
if (ret < 0) {
LOG_ERRNO("failed to read from pipe");
goto out;
} else if (ret == sizeof(_errno)) {
LOG_ERRNO(
"%s: failed to execute", argc == 0 ? conf->shell : argv[0]);
goto out;
} else
LOG_DBG("%s: successfully started", conf->shell);
break;
}
}
}
/* Read logic requires non-blocking mode */
{
int fd_flags = fcntl(term->ptmx, F_GETFL);
if (fd_flags == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
if (fcntl(term->ptmx, F_SETFL, fd_flags | O_NONBLOCK) == -1) {
LOG_ERRNO("failed to set non blocking mode on PTY master");
goto out;
}
}
wayl->term = term;
return term;
out:
term_destroy(term);
return NULL;
}
int
term_destroy(struct terminal *term)
{
if (term == NULL)
return 0;
wayl_win_destroy(term->window);
if (term->delayed_render_timer.lower_fd != -1)
close(term->delayed_render_timer.lower_fd);
if (term->delayed_render_timer.upper_fd != -1)
close(term->delayed_render_timer.upper_fd);
mtx_lock(&term->render.workers.lock);
assert(tll_length(term->render.workers.queue) == 0);
for (size_t i = 0; i < term->render.workers.count; i++) {
sem_post(&term->render.workers.start);
tll_push_back(term->render.workers.queue, -2);
}
cnd_broadcast(&term->render.workers.cond);
mtx_unlock(&term->render.workers.lock);
free(term->vt.osc.data);
for (int row = 0; row < term->normal.num_rows; row++)
grid_row_free(term->normal.rows[row]);
free(term->normal.rows);
for (int row = 0; row < term->alt.num_rows; row++)
grid_row_free(term->alt.rows[row]);
free(term->alt.rows);
free(term->window_title);
tll_free_and_free(term->window_title_stack, free);
for (size_t i = 0; i < sizeof(term->fonts) / sizeof(term->fonts[0]); i++)
font_destroy(term->fonts[i]);
free(term->search.buf);
if (term->flash.fd != -1)
close(term->flash.fd);
if (term->blink.fd != -1)
close(term->blink.fd);
if (term->ptmx != -1)
close(term->ptmx);
for (size_t i = 0; i < term->render.workers.count; i++)
thrd_join(term->render.workers.threads[i], NULL);
free(term->render.workers.threads);
cnd_destroy(&term->render.workers.cond);
mtx_destroy(&term->render.workers.lock);
sem_destroy(&term->render.workers.start);
sem_destroy(&term->render.workers.done);
assert(tll_length(term->render.workers.queue) == 0);
tll_free(term->render.workers.queue);
int ret = EXIT_SUCCESS;
if (term->slave > 0) {
/* Note: we've closed ptmx, so the slave *should* exit... */
int status;
waitpid(term->slave, &status, 0);
int child_ret = EXIT_FAILURE;
if (WIFEXITED(status)) {
child_ret = WEXITSTATUS(status);
LOG_DBG("slave exited with code %d", child_ret);
} else if (WIFSIGNALED(status)) {
child_ret = WTERMSIG(status);
LOG_WARN("slave exited with signal %d", child_ret);
} else {
LOG_WARN("slave exited for unknown reason (status = 0x%08x)", status);
}
ret = child_ret;
}
free(term);
return ret;
}
void
term_reset(struct terminal *term, bool hard)
{

View file

@ -8,6 +8,8 @@
#include <threads.h>
#include <semaphore.h>
//#include "config.h"
#include "fdm.h"
#include "font.h"
#include "tllist.h"
#include "wayland.h"
@ -142,6 +144,8 @@ enum mouse_reporting {
enum cursor_style { CURSOR_BLOCK, CURSOR_UNDERLINE, CURSOR_BAR };
struct terminal {
struct fdm *fdm;
pid_t slave;
int ptmx;
bool quit;
@ -283,6 +287,12 @@ struct terminal {
} delayed_render_timer;
};
struct config;
struct terminal *term_init(
const struct config *conf, struct fdm *fdm, struct wayland *wayl,
int argc, char *const *argv);
int term_destroy(struct terminal *term);
void term_reset(struct terminal *term, bool hard);
void term_damage_rows(struct terminal *term, int start, int end);