1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
|
From 377e2f20c1034de1195fd900fc637821952cfa49 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Timo=20Ter=C3=A4s?= <timo.teras@iki.fi>
Date: Mon, 24 Sep 2012 07:58:29 +0300
Subject: [PATCH 07/16] fbsplash: support console switching
---
miscutils/fbsplash.c | 82 +++++++++++++++++++++++++++++++++++++++++++++++-----
1 file changed, 75 insertions(+), 7 deletions(-)
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index 5b2e5ac56..bc80f728c 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -47,7 +47,7 @@
//kbuild:lib-$(CONFIG_FBSPLASH) += fbsplash.o
//usage:#define fbsplash_trivial_usage
-//usage: "-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD]"
+//usage: "-s IMGFILE [-c] [-d DEV] [-i INIFILE] [-f CMD] [-T tty]"
//usage:#define fbsplash_full_usage "\n\n"
//usage: " -s Image"
//usage: "\n -c Hide cursor"
@@ -57,11 +57,17 @@
//usage: "\n BAR_R,BAR_G,BAR_B"
//usage: "\n -f Control pipe (else exit after drawing image)"
//usage: "\n commands: 'NN' (% for progress bar) or 'exit'"
+//usage: "\n -T Switch to TTY to hide all console messages"
#include "libbb.h"
#include "common_bufsiz.h"
#include <linux/fb.h>
+#include <sys/vt.h>
+#include <sys/ioctl.h>
+#include <linux/tiocl.h>
+#include <linux/kd.h>
+
/* If you want logging messages on /tmp/fbsplash.log... */
#define DEBUG 0
@@ -75,6 +81,8 @@ struct globals {
unsigned char *addr; // pointer to framebuffer memory
unsigned ns[7]; // n-parameters
const char *image_filename;
+ int silent_tty, fd_tty_s;
+ bool do_not_draw;
struct fb_var_screeninfo scr_var;
struct fb_fix_screeninfo scr_fix;
unsigned bytes_per_pixel;
@@ -485,6 +493,11 @@ static void init(const char *cfg_filename)
config_close(parser);
}
+static void sighandler(int sig)
+{
+ ioctl(G.fd_tty_s, VT_RELDISP, sig == SIGUSR1 ? 1 : 2);
+ G.do_not_draw = (sig != SIGUSR2);
+}
int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fbsplash_main(int argc UNUSED_PARAM, char **argv)
@@ -494,6 +507,9 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
char *num_buf;
unsigned num;
bool bCursorOff;
+ int fd_tty0, active_vt;
+ struct vt_stat vtstat;
+ struct vt_mode vt;
INIT_G();
@@ -501,8 +517,9 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
fb_device = "/dev/fb0";
cfg_filename = NULL;
fifo_filename = NULL;
- bCursorOff = 1 & getopt32(argv, "cs:d:i:f:",
- &G.image_filename, &fb_device, &cfg_filename, &fifo_filename);
+ bCursorOff = 1 & getopt32(argv, "cs:d:i:f:T:",
+ &G.image_filename, &fb_device, &cfg_filename, &fifo_filename,
+ &G.silent_tty);
// parse configuration file
if (cfg_filename)
@@ -512,11 +529,43 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
if (!G.image_filename)
bb_show_usage();
+ fd_tty0 = get_console_fd_or_die();
+ if (G.silent_tty) {
+ char buf[16];
+
+ /* Initialize TTY */
+ bb_signals((1LL << SIGUSR1) | (1LL << SIGUSR2), sighandler);
+ snprintf(buf, sizeof(buf), "/dev/tty%d", G.silent_tty);
+ G.fd_tty_s = xopen(buf, O_RDWR | O_NOCTTY);
+
+ /* Activate TTY */
+ xioctl(fd_tty0, VT_GETSTATE, &vtstat);
+ active_vt = vtstat.v_active;
+ console_make_active(fd_tty0, G.silent_tty);
+
+ /* Get notifications on console changes */
+ vt.mode = VT_PROCESS;
+ vt.waitv = 0;
+ vt.relsig = SIGUSR1;
+ vt.acqsig = SIGUSR2;
+ ioctl(G.fd_tty_s, VT_SETMODE, &vt);
+
+ /* Redirect all kernel messages to tty1 so that they don't get
+ * printed over our silent splash image. And clear it. */
+ buf[0] = TIOCL_SETKMSGREDIRECT;
+ buf[1] = 1;
+ ioctl(G.fd_tty_s, TIOCLINUX, buf);
+ full_write(G.fd_tty_s, "\e[H\e[2J" "\e[?17;0c", 7+8);
+ ioctl(G.fd_tty_s, KDSETMODE, KD_GRAPHICS);
+ } else {
+ G.fd_tty_s = STDOUT_FILENO;
+ }
+
fb_open(fb_device);
if (fifo_filename && bCursorOff) {
// hide cursor (BEFORE any fb ops)
- full_write(STDOUT_FILENO, ESC"[?25l", 6);
+ full_write(G.fd_tty_s, ESC"[?25l", 6);
}
fb_drawimage();
@@ -524,6 +573,7 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
if (!fifo_filename)
return EXIT_SUCCESS;
+ sig_block(SIGUSR1);
fp = xfopen_stdin(fifo_filename);
if (fp != stdin) {
// For named pipes, we want to support this:
@@ -539,8 +589,9 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
// and become an additional writer :)
open(fifo_filename, O_WRONLY); // errors are ignored
}
-
fb_drawprogressbar(0);
+ sig_unblock(SIGUSR1);
+
// Block on read, waiting for some input.
// Use of <stdio.h> style I/O allows to correctly
// handle a case when we have many buffered lines
@@ -555,12 +606,29 @@ int fbsplash_main(int argc UNUSED_PARAM, char **argv)
#if DEBUG
DEBUG_MESSAGE(itoa(num));
#endif
- fb_drawprogressbar(num);
+ sig_block(SIGUSR1);
+ if (!G.do_not_draw)
+ fb_drawprogressbar(num);
+ sig_unblock(SIGUSR1);
}
free(num_buf);
}
- if (bCursorOff) // restore cursor
+ if (G.silent_tty) {
+ usleep(100*1000);
+
+ ioctl(G.fd_tty_s, VT_RELDISP, 1);
+ ioctl(G.fd_tty_s, KDSETMODE, KD_TEXT);
+ vt.mode = VT_AUTO;
+ vt.waitv = 0;
+ ioctl(G.fd_tty_s, VT_SETMODE, &vt);
+ close(G.fd_tty_s);
+
+ xioctl(fd_tty0, VT_GETSTATE, &vtstat);
+ if (vtstat.v_active == G.silent_tty)
+ console_make_active(fd_tty0, active_vt);
+ ioctl(fd_tty0, VT_DISALLOCATE, (void *)(ptrdiff_t)G.silent_tty);
+ } else if (bCursorOff) // restore cursor
full_write(STDOUT_FILENO, ESC"[?25h", 6);
return EXIT_SUCCESS;
--
2.16.2
|
