1#include <signal.h>
2#include <stdbool.h>
3#ifdef HAVE_BACKTRACE_SUPPORT
4#include <execinfo.h>
5#endif
6
7#include "../../util/cache.h"
8#include "../../util/debug.h"
9#include "../browser.h"
10#include "../helpline.h"
11#include "../ui.h"
12#include "../util.h"
13#include "../libslang.h"
14#include "../keysyms.h"
15#include "tui.h"
16
17static volatile int ui__need_resize;
18
19extern struct perf_error_ops perf_tui_eops;
20extern bool tui_helpline__set;
21
22extern void hist_browser__init_hpp(void);
23
24void ui__refresh_dimensions(bool force)
25{
26	if (force || ui__need_resize) {
27		ui__need_resize = 0;
28		pthread_mutex_lock(&ui__lock);
29		SLtt_get_screen_size();
30		SLsmg_reinit_smg();
31		pthread_mutex_unlock(&ui__lock);
32	}
33}
34
35static void ui__sigwinch(int sig __maybe_unused)
36{
37	ui__need_resize = 1;
38}
39
40static void ui__setup_sigwinch(void)
41{
42	static bool done;
43
44	if (done)
45		return;
46
47	done = true;
48	pthread__unblock_sigwinch();
49	signal(SIGWINCH, ui__sigwinch);
50}
51
52int ui__getch(int delay_secs)
53{
54	struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
55	fd_set read_set;
56	int err, key;
57
58	ui__setup_sigwinch();
59
60	FD_ZERO(&read_set);
61	FD_SET(0, &read_set);
62
63	if (delay_secs) {
64		timeout.tv_sec = delay_secs;
65		timeout.tv_usec = 0;
66	}
67
68        err = select(1, &read_set, NULL, NULL, ptimeout);
69
70	if (err == 0)
71		return K_TIMER;
72
73	if (err == -1) {
74		if (errno == EINTR)
75			return K_RESIZE;
76		return K_ERROR;
77	}
78
79	key = SLang_getkey();
80	if (key != K_ESC)
81		return key;
82
83	FD_ZERO(&read_set);
84	FD_SET(0, &read_set);
85	timeout.tv_sec = 0;
86	timeout.tv_usec = 20;
87        err = select(1, &read_set, NULL, NULL, &timeout);
88	if (err == 0)
89		return K_ESC;
90
91	SLang_ungetkey(key);
92	return SLkp_getkey();
93}
94
95#ifdef HAVE_BACKTRACE_SUPPORT
96static void ui__signal_backtrace(int sig)
97{
98	void *stackdump[32];
99	size_t size;
100
101	ui__exit(false);
102	psignal(sig, "perf");
103
104	printf("-------- backtrace --------\n");
105	size = backtrace(stackdump, ARRAY_SIZE(stackdump));
106	backtrace_symbols_fd(stackdump, size, STDOUT_FILENO);
107
108	exit(0);
109}
110#else
111# define ui__signal_backtrace  ui__signal
112#endif
113
114static void ui__signal(int sig)
115{
116	ui__exit(false);
117	psignal(sig, "perf");
118	exit(0);
119}
120
121int ui__init(void)
122{
123	int err;
124
125	SLutf8_enable(-1);
126	SLtt_get_terminfo();
127	SLtt_get_screen_size();
128
129	err = SLsmg_init_smg();
130	if (err < 0)
131		goto out;
132	err = SLang_init_tty(0, 0, 0);
133	if (err < 0)
134		goto out;
135
136	err = SLkp_init();
137	if (err < 0) {
138		pr_err("TUI initialization failed.\n");
139		goto out;
140	}
141
142	SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
143
144	ui_helpline__init();
145	ui_browser__init();
146	tui_progress__init();
147
148	signal(SIGSEGV, ui__signal_backtrace);
149	signal(SIGFPE, ui__signal_backtrace);
150	signal(SIGINT, ui__signal);
151	signal(SIGQUIT, ui__signal);
152	signal(SIGTERM, ui__signal);
153
154	perf_error__register(&perf_tui_eops);
155
156	hist_browser__init_hpp();
157out:
158	return err;
159}
160
161void ui__exit(bool wait_for_ok)
162{
163	if (wait_for_ok && tui_helpline__set)
164		ui__question_window("Fatal Error",
165				    ui_helpline__last_msg,
166				    "Press any key...", 0);
167
168	SLtt_set_cursor_visibility(1);
169	SLsmg_refresh();
170	SLsmg_reset_smg();
171	SLang_reset_tty();
172
173	perf_error__unregister(&perf_tui_eops);
174}
175