Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include <newt.h>
2#include <signal.h>
3#include <stdbool.h>
4
5#include "../../util/cache.h"
6#include "../../util/debug.h"
7#include "../browser.h"
8#include "../helpline.h"
9#include "../ui.h"
10#include "../util.h"
11#include "../libslang.h"
12#include "../keysyms.h"
13
14static volatile int ui__need_resize;
15
16extern struct perf_error_ops perf_tui_eops;
17
18extern void hist_browser__init_hpp(void);
19
20void ui__refresh_dimensions(bool force)
21{
22 if (force || ui__need_resize) {
23 ui__need_resize = 0;
24 pthread_mutex_lock(&ui__lock);
25 SLtt_get_screen_size();
26 SLsmg_reinit_smg();
27 pthread_mutex_unlock(&ui__lock);
28 }
29}
30
31static void ui__sigwinch(int sig __maybe_unused)
32{
33 ui__need_resize = 1;
34}
35
36static void ui__setup_sigwinch(void)
37{
38 static bool done;
39
40 if (done)
41 return;
42
43 done = true;
44 pthread__unblock_sigwinch();
45 signal(SIGWINCH, ui__sigwinch);
46}
47
48int ui__getch(int delay_secs)
49{
50 struct timeval timeout, *ptimeout = delay_secs ? &timeout : NULL;
51 fd_set read_set;
52 int err, key;
53
54 ui__setup_sigwinch();
55
56 FD_ZERO(&read_set);
57 FD_SET(0, &read_set);
58
59 if (delay_secs) {
60 timeout.tv_sec = delay_secs;
61 timeout.tv_usec = 0;
62 }
63
64 err = select(1, &read_set, NULL, NULL, ptimeout);
65
66 if (err == 0)
67 return K_TIMER;
68
69 if (err == -1) {
70 if (errno == EINTR)
71 return K_RESIZE;
72 return K_ERROR;
73 }
74
75 key = SLang_getkey();
76 if (key != K_ESC)
77 return key;
78
79 FD_ZERO(&read_set);
80 FD_SET(0, &read_set);
81 timeout.tv_sec = 0;
82 timeout.tv_usec = 20;
83 err = select(1, &read_set, NULL, NULL, &timeout);
84 if (err == 0)
85 return K_ESC;
86
87 SLang_ungetkey(key);
88 return SLkp_getkey();
89}
90
91static void newt_suspend(void *d __maybe_unused)
92{
93 newtSuspend();
94 raise(SIGTSTP);
95 newtResume();
96}
97
98static void ui__signal(int sig)
99{
100 ui__exit(false);
101 psignal(sig, "perf");
102 exit(0);
103}
104
105int ui__init(void)
106{
107 int err;
108
109 newtInit();
110 err = SLkp_init();
111 if (err < 0) {
112 pr_err("TUI initialization failed.\n");
113 goto out;
114 }
115
116 SLkp_define_keysym((char *)"^(kB)", SL_KEY_UNTAB);
117
118 newtSetSuspendCallback(newt_suspend, NULL);
119 ui_helpline__init();
120 ui_browser__init();
121
122 signal(SIGSEGV, ui__signal);
123 signal(SIGFPE, ui__signal);
124 signal(SIGINT, ui__signal);
125 signal(SIGQUIT, ui__signal);
126 signal(SIGTERM, ui__signal);
127
128 perf_error__register(&perf_tui_eops);
129
130 hist_browser__init_hpp();
131out:
132 return err;
133}
134
135void ui__exit(bool wait_for_ok)
136{
137 if (wait_for_ok)
138 ui__question_window("Fatal Error",
139 ui_helpline__last_msg,
140 "Press any key...", 0);
141
142 SLtt_set_cursor_visibility(1);
143 SLsmg_refresh();
144 SLsmg_reset_smg();
145 SLang_reset_tty();
146
147 perf_error__unregister(&perf_tui_eops);
148}