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mpv/osdep/terminal-unix.c
wm4 b62634c051 player: make --terminal freetly settable at runtime
So client API users don't have to care about whether to set this before
or after mpv_initialize().

We still don't enable terminal at any point before mpv_initialize(),
because reasons.

This also subtly changes some behavior how terminal options are applied
while parsing. This essentially reverts the behavior as it was reported
in issue #2588. Originally, I was hoping to get rid of the pre-parse
option pass, but it seems this is absolutely not possible due to the way
config and command line parsing are entangled. Command line options take
priority over configfile options, so they have to be applied later - but
we also want to apply logging and terminal options as specified on the
command-line, but _before_ parsing the config files. It has to be this
way to see config file error messages on the terminal, or to hide them
if --no-terminal is used. libmpv considerations also factor into this.
2016-09-19 19:54:54 +02:00

496 lines
14 KiB
C

/*
* GyS-TermIO v2.0 (for GySmail v3)
* a very small replacement of ncurses library
*
* copyright (C) 1999 A'rpi/ESP-team
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <pthread.h>
#include <assert.h>
#if HAVE_TERMIOS
#if HAVE_TERMIOS_H
#include <termios.h>
#endif
#if HAVE_SYS_TERMIOS_H
#include <sys/termios.h>
#endif
#endif
#include <unistd.h>
#include <poll.h>
#include "osdep/io.h"
#include "osdep/threads.h"
#include "common/common.h"
#include "misc/bstr.h"
#include "input/input.h"
#include "input/keycodes.h"
#include "misc/ctype.h"
#include "terminal.h"
#if HAVE_TERMIOS
static volatile struct termios tio_orig;
static volatile int tio_orig_set;
#endif
struct key_entry {
const char *seq;
int mpkey;
// If this is not NULL, then if seq is matched as unique prefix, the
// existing sequence is replaced by the following string. Matching
// continues normally, and mpkey is or-ed into the final result.
const char *replace;
};
static const struct key_entry keys[] = {
{"\010", MP_KEY_BS},
{"\011", MP_KEY_TAB},
{"\012", MP_KEY_ENTER},
{"\177", MP_KEY_BS},
{"\033[1~", MP_KEY_HOME},
{"\033[2~", MP_KEY_INS},
{"\033[3~", MP_KEY_DEL},
{"\033[4~", MP_KEY_END},
{"\033[5~", MP_KEY_PGUP},
{"\033[6~", MP_KEY_PGDWN},
{"\033[7~", MP_KEY_HOME},
{"\033[8~", MP_KEY_END},
{"\033[11~", MP_KEY_F+1},
{"\033[12~", MP_KEY_F+2},
{"\033[13~", MP_KEY_F+3},
{"\033[14~", MP_KEY_F+4},
{"\033[15~", MP_KEY_F+5},
{"\033[17~", MP_KEY_F+6},
{"\033[18~", MP_KEY_F+7},
{"\033[19~", MP_KEY_F+8},
{"\033[20~", MP_KEY_F+9},
{"\033[21~", MP_KEY_F+10},
{"\033[23~", MP_KEY_F+11},
{"\033[24~", MP_KEY_F+12},
{"\033[A", MP_KEY_UP},
{"\033[B", MP_KEY_DOWN},
{"\033[C", MP_KEY_RIGHT},
{"\033[D", MP_KEY_LEFT},
{"\033[E", MP_KEY_KP5},
{"\033[F", MP_KEY_END},
{"\033[H", MP_KEY_HOME},
{"\033[[A", MP_KEY_F+1},
{"\033[[B", MP_KEY_F+2},
{"\033[[C", MP_KEY_F+3},
{"\033[[D", MP_KEY_F+4},
{"\033[[E", MP_KEY_F+5},
{"\033OE", MP_KEY_KP5}, // mintty?
{"\033OM", MP_KEY_KPENTER},
{"\033OP", MP_KEY_F+1},
{"\033OQ", MP_KEY_F+2},
{"\033OR", MP_KEY_F+3},
{"\033OS", MP_KEY_F+4},
{"\033Oa", MP_KEY_UP | MP_KEY_MODIFIER_CTRL}, // urxvt
{"\033Ob", MP_KEY_DOWN | MP_KEY_MODIFIER_CTRL},
{"\033Oc", MP_KEY_RIGHT | MP_KEY_MODIFIER_CTRL},
{"\033Od", MP_KEY_LEFT | MP_KEY_MODIFIER_CTRL},
{"\033Oj", '*'}, // also keypad, but we don't have separate codes for them
{"\033Ok", '+'},
{"\033Om", '-'},
{"\033On", MP_KEY_KPDEC},
{"\033Oo", '/'},
{"\033Op", MP_KEY_KP0},
{"\033Oq", MP_KEY_KP1},
{"\033Or", MP_KEY_KP2},
{"\033Os", MP_KEY_KP3},
{"\033Ot", MP_KEY_KP4},
{"\033Ou", MP_KEY_KP5},
{"\033Ov", MP_KEY_KP6},
{"\033Ow", MP_KEY_KP7},
{"\033Ox", MP_KEY_KP8},
{"\033Oy", MP_KEY_KP9},
{"\033[a", MP_KEY_UP | MP_KEY_MODIFIER_SHIFT}, // urxvt
{"\033[b", MP_KEY_DOWN | MP_KEY_MODIFIER_SHIFT},
{"\033[c", MP_KEY_RIGHT | MP_KEY_MODIFIER_SHIFT},
{"\033[d", MP_KEY_LEFT | MP_KEY_MODIFIER_SHIFT},
{"\033[2^", MP_KEY_INS | MP_KEY_MODIFIER_CTRL},
{"\033[3^", MP_KEY_DEL | MP_KEY_MODIFIER_CTRL},
{"\033[5^", MP_KEY_PGUP | MP_KEY_MODIFIER_CTRL},
{"\033[6^", MP_KEY_PGDWN | MP_KEY_MODIFIER_CTRL},
{"\033[7^", MP_KEY_HOME | MP_KEY_MODIFIER_CTRL},
{"\033[8^", MP_KEY_END | MP_KEY_MODIFIER_CTRL},
{"\033[1;2", MP_KEY_MODIFIER_SHIFT, .replace = "\033["}, // xterm
{"\033[1;3", MP_KEY_MODIFIER_ALT, .replace = "\033["},
{"\033[1;5", MP_KEY_MODIFIER_CTRL, .replace = "\033["},
{"\033[1;4", MP_KEY_MODIFIER_ALT | MP_KEY_MODIFIER_SHIFT, .replace = "\033["},
{"\033[1;6", MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_SHIFT, .replace = "\033["},
{"\033[1;7", MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_ALT, .replace = "\033["},
{"\033[1;8",
MP_KEY_MODIFIER_CTRL | MP_KEY_MODIFIER_ALT | MP_KEY_MODIFIER_SHIFT,
.replace = "\033["},
{"\033[29~", MP_KEY_MENU},
{"\033[Z", MP_KEY_TAB | MP_KEY_MODIFIER_SHIFT},
{0}
};
#define BUF_LEN 256
struct termbuf {
unsigned char b[BUF_LEN];
int len;
int mods;
};
static void skip_buf(struct termbuf *b, unsigned int count)
{
assert(count <= b->len);
memmove(&b->b[0], &b->b[count], b->len - count);
b->len -= count;
b->mods = 0;
}
static struct termbuf buf;
static bool getch2(struct input_ctx *input_ctx)
{
int retval = read(0, &buf.b[buf.len], BUF_LEN - buf.len);
/* Return false on EOF to stop running select() on the FD, as it'd
* trigger all the time. Note that it's possible to get temporary
* EOF on terminal if the user presses ctrl-d, but that shouldn't
* happen if the terminal state change done in terminal_init()
* works.
*/
if (retval == 0)
return false;
if (retval == -1)
return errno != EBADF && errno != EINVAL;
buf.len += retval;
while (buf.len) {
int utf8_len = bstr_parse_utf8_code_length(buf.b[0]);
if (utf8_len > 1) {
if (buf.len < utf8_len)
goto read_more;
mp_input_put_key_utf8(input_ctx, buf.mods, (bstr){buf.b, utf8_len});
skip_buf(&buf, utf8_len);
continue;
}
const struct key_entry *match = NULL; // may be a partial match
for (int n = 0; keys[n].seq; n++) {
const struct key_entry *e = &keys[n];
if (memcmp(e->seq, buf.b, MPMIN(buf.len, strlen(e->seq))) == 0) {
if (match)
goto read_more; /* need more bytes to disambiguate */
match = e;
}
}
if (!match) { // normal or unknown key
if (buf.b[0] == '\033') {
skip_buf(&buf, 1);
if (buf.len > 0 && mp_isalnum(buf.b[0])) { // meta+normal key
mp_input_put_key(input_ctx, buf.b[0] | MP_KEY_MODIFIER_ALT);
skip_buf(&buf, 1);
} else if (buf.len == 1 && buf.b[0] == '\033') {
mp_input_put_key(input_ctx, MP_KEY_ESC);
skip_buf(&buf, 1);
} else {
// Throw it away. Typically, this will be a complete,
// unsupported sequence, and dropping this will skip it.
skip_buf(&buf, buf.len);
}
} else {
mp_input_put_key(input_ctx, buf.b[0]);
skip_buf(&buf, 1);
}
continue;
}
int seq_len = strlen(match->seq);
if (seq_len > buf.len)
goto read_more; /* partial match */
if (match->replace) {
int rep = strlen(match->replace);
assert(rep <= seq_len);
memcpy(buf.b, match->replace, rep);
memmove(buf.b + rep, buf.b + seq_len, buf.len - seq_len);
buf.len = rep + buf.len - seq_len;
buf.mods |= match->mpkey;
continue;
}
mp_input_put_key(input_ctx, buf.mods | match->mpkey);
skip_buf(&buf, seq_len);
}
read_more: /* need more bytes */
return true;
}
static volatile int getch2_active = 0;
static volatile int getch2_enabled = 0;
static bool read_terminal;
static void enable_kx(bool enable)
{
// This check is actually always true, as enable_kx calls are all guarded
// by read_terminal, which is true only if both stdin and stdout are a
// tty. Note that stderr being redirected away has no influence over mpv's
// I/O handling except for disabling the terminal OSD, and thus stderr
// shouldn't be relied on here either.
if (isatty(STDOUT_FILENO)) {
char *cmd = enable ? "\033=" : "\033>";
(void)write(STDOUT_FILENO, cmd, strlen(cmd));
}
}
static void do_activate_getch2(void)
{
if (getch2_active || !read_terminal)
return;
enable_kx(true);
#if HAVE_TERMIOS
struct termios tio_new;
tcgetattr(0,&tio_new);
if (!tio_orig_set) {
tio_orig = tio_new;
tio_orig_set = 1;
}
tio_new.c_lflag &= ~(ICANON|ECHO); /* Clear ICANON and ECHO. */
tio_new.c_cc[VMIN] = 1;
tio_new.c_cc[VTIME] = 0;
tcsetattr(0,TCSANOW,&tio_new);
#endif
getch2_active = 1;
}
static void do_deactivate_getch2(void)
{
if (!getch2_active)
return;
enable_kx(false);
#if HAVE_TERMIOS
if (tio_orig_set) {
// once set, it will never be set again
// so we can cast away volatile here
tcsetattr(0, TCSANOW, (const struct termios *) &tio_orig);
}
#endif
getch2_active = 0;
}
// sigaction wrapper
static int setsigaction(int signo, void (*handler) (int),
int flags, bool do_mask)
{
struct sigaction sa;
sa.sa_handler = handler;
if(do_mask)
sigfillset(&sa.sa_mask);
else
sigemptyset(&sa.sa_mask);
sa.sa_flags = flags | SA_RESTART;
return sigaction(signo, &sa, NULL);
}
static void getch2_poll(void)
{
if (!getch2_enabled)
return;
// check if stdin is in the foreground process group
int newstatus = (tcgetpgrp(0) == getpgrp());
// and activate getch2 if it is, deactivate otherwise
if (newstatus)
do_activate_getch2();
else
do_deactivate_getch2();
}
static void stop_sighandler(int signum)
{
do_deactivate_getch2();
// note: for this signal, we use SA_RESETHAND but do NOT mask signals
// so this will invoke the default handler
raise(SIGTSTP);
}
static void continue_sighandler(int signum)
{
// SA_RESETHAND has reset SIGTSTP, so we need to restore it here
setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
getch2_poll();
}
static pthread_t input_thread;
static struct input_ctx *input_ctx;
static int death_pipe[2];
static void quit_request_sighandler(int signum)
{
do_deactivate_getch2();
(void)write(death_pipe[1], &(char){1}, 1);
}
static void *terminal_thread(void *ptr)
{
mpthread_set_name("terminal");
bool stdin_ok = read_terminal; // if false, we still wait for SIGTERM
while (1) {
getch2_poll();
struct pollfd fds[2] = {
{.events = POLLIN, .fd = death_pipe[0]},
{.events = POLLIN, .fd = STDIN_FILENO},
};
poll(fds, stdin_ok ? 2 : 1, -1);
if (fds[0].revents)
break;
if (fds[1].revents)
stdin_ok = getch2(input_ctx);
}
char c;
bool quit = read(death_pipe[0], &c, 1) == 1 && c == 1;
// Important if we received SIGTERM, rather than regular quit.
if (quit) {
struct mp_cmd *cmd = mp_input_parse_cmd(input_ctx, bstr0("quit 4"), "");
if (cmd)
mp_input_queue_cmd(input_ctx, cmd);
}
return NULL;
}
void terminal_setup_getch(struct input_ctx *ictx)
{
if (!getch2_enabled || input_ctx)
return;
if (mp_make_wakeup_pipe(death_pipe) < 0)
return;
// Disable reading from the terminal even if stdout is not a tty, to make
// mpv ... | less
// do the right thing.
read_terminal = isatty(STDIN_FILENO) && isatty(STDOUT_FILENO);
input_ctx = ictx;
if (pthread_create(&input_thread, NULL, terminal_thread, NULL)) {
input_ctx = NULL;
close(death_pipe[0]);
close(death_pipe[1]);
return;
}
setsigaction(SIGINT, quit_request_sighandler, SA_RESETHAND, false);
setsigaction(SIGQUIT, quit_request_sighandler, SA_RESETHAND, false);
setsigaction(SIGTERM, quit_request_sighandler, SA_RESETHAND, false);
}
void terminal_uninit(void)
{
if (!getch2_enabled)
return;
// restore signals
setsigaction(SIGCONT, SIG_DFL, 0, false);
setsigaction(SIGTSTP, SIG_DFL, 0, false);
setsigaction(SIGINT, SIG_DFL, 0, false);
setsigaction(SIGQUIT, SIG_DFL, 0, false);
setsigaction(SIGTERM, SIG_DFL, 0, false);
setsigaction(SIGTTIN, SIG_DFL, 0, false);
setsigaction(SIGTTOU, SIG_DFL, 0, false);
do_deactivate_getch2();
if (input_ctx) {
(void)write(death_pipe[1], &(char){0}, 1);
pthread_join(input_thread, NULL);
close(death_pipe[0]);
close(death_pipe[1]);
input_ctx = NULL;
}
getch2_enabled = 0;
read_terminal = false;
}
bool terminal_in_background(void)
{
return read_terminal && tcgetpgrp(STDERR_FILENO) != getpgrp();
}
void terminal_get_size(int *w, int *h)
{
struct winsize ws;
if (ioctl(0, TIOCGWINSZ, &ws) < 0 || !ws.ws_row || !ws.ws_col)
return;
*w = ws.ws_col;
*h = ws.ws_row;
}
int terminal_init(void)
{
assert(!getch2_enabled);
getch2_enabled = 1;
// handlers to fix terminal settings
setsigaction(SIGCONT, continue_sighandler, 0, true);
setsigaction(SIGTSTP, stop_sighandler, SA_RESETHAND, false);
setsigaction(SIGTTIN, SIG_IGN, 0, true);
setsigaction(SIGTTOU, SIG_IGN, 0, true);
getch2_poll();
return 0;
}