busybox/miscutils/fbsplash.c

/* vi: set sw=4 ts=4: */
/*
 * Copyright (C) 2008 Michele Sanges <michele.sanges@otomelara.it>,
 * <michele.sanges@gmail.it>
 *
 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
 *
 * Usage:
 * - use kernel option 'vga=xxx' or otherwise enable framebuffer device.
 * - put somewhere fbsplash.cfg file and an image in .ppm format.
 * - run applet: $ setsid fbsplash [params] &
 *      -c: hide cursor
 *      -d /dev/fbN: framebuffer device (if not /dev/fb0)
 *      -s path_to_image_file (can be "-" for stdin)
 *      -i path_to_cfg_file
 *      -f path_to_fifo (can be "-" for stdin)
 * - if you want to run it only in presence of a kernel parameter
 *   (for example fbsplash=on), use:
 *   grep -q "fbsplash=on" </proc/cmdline && setsid fbsplash [params]
 * - commands for fifo:
 *   "NN" (ASCII decimal number) - percentage to show on progress bar.
 *   "exit" (or just close fifo) - well you guessed it.
 */

#include "libbb.h"
#include <linux/fb.h>

/* If you want logging messages on /tmp/fbsplash.log... */
#define DEBUG 0

#define BYTES_PER_PIXEL 2

typedef unsigned short DATA;

struct globals {
#if DEBUG
	bool bdebug_messages;	// enable/disable logging
	FILE *logfile_fd;	// log file
#endif
	unsigned char *addr;	// pointer to framebuffer memory
	unsigned ns[7];		// n-parameters
	const char *image_filename;
	struct fb_var_screeninfo scr_var;
	struct fb_fix_screeninfo scr_fix;
};
#define G (*ptr_to_globals)
#define INIT_G() do { \
	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
} while (0)

#define nbar_width	ns[0]	// progress bar width
#define nbar_height	ns[1]	// progress bar height
#define nbar_posx	ns[2]	// progress bar horizontal position
#define nbar_posy	ns[3]	// progress bar vertical position
#define nbar_colr	ns[4]	// progress bar color red component
#define nbar_colg	ns[5]	// progress bar color green component
#define nbar_colb	ns[6]	// progress bar color blue component

#if DEBUG
#define DEBUG_MESSAGE(strMessage, args...) \
	if (G.bdebug_messages) { \
		fprintf(G.logfile_fd, "[%s][%s] - %s\n", \
		__FILE__, __FUNCTION__, strMessage);	\
	}
#else
#define DEBUG_MESSAGE(...) ((void)0)
#endif


/**
 *	Open and initialize the framebuffer device
 * \param *strfb_device pointer to framebuffer device
 */
static void fb_open(const char *strfb_device)
{
	int fbfd = xopen(strfb_device, O_RDWR);

	// framebuffer properties
	xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
	xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);

	if (G.scr_var.bits_per_pixel != 16)
		bb_error_msg_and_die("only 16 bpp is supported");

	// map the device in memory
	G.addr = mmap(NULL,
			G.scr_var.xres * G.scr_var.yres
			* BYTES_PER_PIXEL /*(G.scr_var.bits_per_pixel / 8)*/ ,
			PROT_WRITE, MAP_SHARED, fbfd, 0);
	if (G.addr == MAP_FAILED)
		bb_perror_msg_and_die("can't mmap %s", strfb_device);
	close(fbfd);
}


/**
 *	Draw hollow rectangle on framebuffer
 */
static void fb_drawrectangle(void)
{
	int cnt;
	DATA thispix;
	DATA *ptr1, *ptr2;
	unsigned char nred = G.nbar_colr/2;
	unsigned char ngreen =  G.nbar_colg/2;
	unsigned char nblue = G.nbar_colb/2;

	nred   >>= 3;  // 5-bit red
	ngreen >>= 2;  // 6-bit green
	nblue  >>= 3;  // 5-bit blue
	thispix = nblue + (ngreen << 5) + (nred << (5+6));

	// horizontal lines
	ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
	ptr2 = (DATA*)(G.addr + ((G.nbar_posy + G.nbar_height - 1) * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
	cnt = G.nbar_width - 1;
	do {
		*ptr1++ = thispix;
		*ptr2++ = thispix;
	} while (--cnt >= 0);

	// vertical lines
	ptr1 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
	ptr2 = (DATA*)(G.addr + (G.nbar_posy * G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * BYTES_PER_PIXEL);
	cnt = G.nbar_posy + G.nbar_height - 1 - G.nbar_posy;
	do {
		*ptr1 = thispix; ptr1 += G.scr_var.xres;
		*ptr2 = thispix; ptr2 += G.scr_var.xres;
	} while (--cnt >= 0);
}


/**
 *	Draw filled rectangle on framebuffer
 * \param nx1pos,ny1pos upper left position
 * \param nx2pos,ny2pos down right position
 * \param nred,ngreen,nblue rgb color
 */
static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
	unsigned char nred, unsigned char ngreen, unsigned char nblue)
{
	int cnt1, cnt2, nypos;
	DATA thispix;
	DATA *ptr;

	nred   >>= 3;  // 5-bit red
	ngreen >>= 2;  // 6-bit green
	nblue  >>= 3;  // 5-bit blue
	thispix = nblue + (ngreen << 5) + (nred << (5+6));

	cnt1 = ny2pos - ny1pos;
	nypos = ny1pos;
	do {
		ptr = (DATA*)(G.addr + (nypos * G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
		cnt2 = nx2pos - nx1pos;
		do {
			*ptr++ = thispix;
		} while (--cnt2 >= 0);

		nypos++;
	} while (--cnt1 >= 0);
}


/**
 *	Draw a progress bar on framebuffer
 * \param percent percentage of loading
 */
static void fb_drawprogressbar(unsigned percent)
{
	int i, left_x, top_y, width, height;

	// outer box
	left_x = G.nbar_posx;
	top_y = G.nbar_posy;
	width = G.nbar_width - 1;
	height = G.nbar_height - 1;
	if ((height | width) < 0)
		return;
	// NB: "width" of 1 actually makes rect with width of 2!
	fb_drawrectangle();

	// inner "empty" rectangle
	left_x++;
	top_y++;
	width -= 2;
	height -= 2;
	if ((height | width) < 0)
		return;
	fb_drawfullrectangle(
			left_x,	top_y,
					left_x + width, top_y + height,
			G.nbar_colr, G.nbar_colg, G.nbar_colb);

	if (percent > 0) {
		// actual progress bar
		width = width * percent / 100;
		i = height;
		if (height == 0)
			height++; // divide by 0 is bad
		while (i >= 0) {
			// draw one-line thick "rectangle"
			// top line will have gray lvl 200, bottom one 100
			unsigned gray_level = 100 + i*100/height;
			fb_drawfullrectangle(
					left_x, top_y, left_x + width, top_y,
					gray_level, gray_level, gray_level);
			top_y++;
			i--;
		}
	}
}


/**
 *	Draw image from PPM file
 */
static void fb_drawimage(void)
{
	char head[256];
	char s[80];
	FILE *theme_file;
	unsigned char *pixline;
	unsigned i, j, width, height, line_size;

	memset(head, 0, sizeof(head));
	theme_file = xfopen_stdin(G.image_filename);

	// parse ppm header
	while (1) {
		if (fgets(s, sizeof(s), theme_file) == NULL)
			bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);

		if (s[0] == '#')
			continue;

		if (strlen(head) + strlen(s) >= sizeof(head))
			bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);

		strcat(head, s);
		if (head[0] != 'P' || head[1] != '6')
			bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);

		// width, height, max_color_val
		if (sscanf(head, "P6 %u %u %u", &width, &height, &i) == 3)
			break;
// TODO: i must be <= 255!
	}

	line_size = width*3;
	if (width > G.scr_var.xres)
		width = G.scr_var.xres;
	if (height > G.scr_var.yres)
		height = G.scr_var.yres;

	pixline = xmalloc(line_size);
	for (j = 0; j < height; j++) {
		unsigned char *pixel = pixline;
		DATA *src = (DATA *)(G.addr + j * G.scr_fix.line_length);

		if (fread(pixline, 1, line_size, theme_file) != line_size)
			bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
		for (i = 0; i < width; i++) {
			unsigned thispix;
			thispix = (((unsigned)pixel[0] << 8) & 0xf800)
				| (((unsigned)pixel[1] << 3) & 0x07e0)
				| (((unsigned)pixel[2] >> 3));
			*src++ = thispix;
			pixel += 3;
		}
	}
	free(pixline);
	fclose(theme_file);
}


/**
 *	Parse configuration file
 * \param *cfg_filename name of the configuration file
 */
static void init(const char *cfg_filename)
{
	static const char const param_names[] ALIGN1 =
		"BAR_WIDTH\0" "BAR_HEIGHT\0"
		"BAR_LEFT\0" "BAR_TOP\0"
		"BAR_R\0" "BAR_G\0" "BAR_B\0"
#if DEBUG
		"DEBUG\0"
#endif
		;
	char *token[2];
	parser_t *parser = config_open2(cfg_filename, xfopen_stdin);
	while (config_read(parser, token, 2, 2, "#=",
				    (PARSE_NORMAL | PARSE_MIN_DIE) & ~(PARSE_TRIM | PARSE_COLLAPSE))) {
		unsigned val = xatoi_u(token[1]);
		int i = index_in_strings(param_names, token[0]);
		if (i < 0)
			bb_error_msg_and_die("syntax error: '%s'", token[0]);
		if (i >= 0 && i < 7)
			G.ns[i] = val;
#if DEBUG
		if (i == 7) {
			G.bdebug_messages = val;
			if (G.bdebug_messages)
				G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
		}
#endif
	}
	config_close(parser);
}


int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int fbsplash_main(int argc UNUSED_PARAM, char **argv)
{
	const char *fb_device, *cfg_filename, *fifo_filename;
	FILE *fp = fp; // for compiler
	char *num_buf;
	unsigned num;
	bool bCursorOff;

	INIT_G();

	// parse command line options
	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);

	// parse configuration file
	if (cfg_filename)
		init(cfg_filename);

	// We must have -s IMG
	if (!G.image_filename)
		bb_show_usage();

	fb_open(fb_device);

	if (fifo_filename && bCursorOff) {
		// hide cursor (BEFORE any fb ops)
		full_write(STDOUT_FILENO, "\x1b" "[?25l", 6);
	}

	fb_drawimage();

	if (!fifo_filename)
		return EXIT_SUCCESS;

	fp = xfopen_stdin(fifo_filename);
	if (fp != stdin) {
		// For named pipes, we want to support this:
		//  mkfifo cmd_pipe
		//  fbsplash -f cmd_pipe .... &
		//  ...
		//  echo 33 >cmd_pipe
		//  ...
		//  echo 66 >cmd_pipe
		// This means that we don't want fbsplash to get EOF
		// when last writer closes input end.
		// The simplest way is to open fifo for writing too
		// and become an additional writer :)
		open(fifo_filename, O_WRONLY); // errors are ignored
	}

	fb_drawprogressbar(0);
	// 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
	// already in the pipe
	while ((num_buf = xmalloc_fgetline(fp)) != NULL) {
		if (strncmp(num_buf, "exit", 4) == 0) {
			DEBUG_MESSAGE("exit");
			break;
		}
		num = atoi(num_buf);
		if (isdigit(num_buf[0]) && (num <= 100)) {
#if DEBUG
			char strVal[10];
			sprintf(strVal, "%d", num);
			DEBUG_MESSAGE(strVal);
#endif
			fb_drawprogressbar(num);
		}
		free(num_buf);
	}

	if (bCursorOff) // restore cursor
		full_write(STDOUT_FILENO, "\x1b" "[?25h", 6);

	return EXIT_SUCCESS;
}
1	/* vi: set sw=4 ts=4: */
2	/*
3	* Copyright (C) 2008 Michele Sanges <michele.sanges@otomelara.it>,
4	* <michele.sanges@gmail.it>
5	*
6	* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
7	*
8	* Usage:
9	* - use kernel option 'vga=xxx' or otherwise enable framebuffer device.
10	* - put somewhere fbsplash.cfg file and an image in .ppm format.
11	* - run applet: $ setsid fbsplash [params] &
12	* -c: hide cursor
13	* -d /dev/fbN: framebuffer device (if not /dev/fb0)
14	* -s path_to_image_file (can be "-" for stdin)
15	* -i path_to_cfg_file
16	* -f path_to_fifo (can be "-" for stdin)
17	* - if you want to run it only in presence of a kernel parameter
18	* (for example fbsplash=on), use:
19	* grep -q "fbsplash=on" </proc/cmdline && setsid fbsplash [params]
20	* - commands for fifo:
21	* "NN" (ASCII decimal number) - percentage to show on progress bar.
22	* "exit" (or just close fifo) - well you guessed it.
23	*/
24
25	#include "libbb.h"
26	#include <linux/fb.h>
27
28	/* If you want logging messages on /tmp/fbsplash.log... */
29	#define DEBUG 0
30
31	#define BYTES_PER_PIXEL 2
32
33	typedef unsigned short DATA;
34
35	struct globals {
36	#if DEBUG
37	bool bdebug_messages; // enable/disable logging
38	FILE *logfile_fd; // log file
39	#endif
40	unsigned char *addr; // pointer to framebuffer memory
41	unsigned ns[7]; // n-parameters
42	const char *image_filename;
43	struct fb_var_screeninfo scr_var;
44	struct fb_fix_screeninfo scr_fix;
45	};
46	#define G (*ptr_to_globals)
47	#define INIT_G() do { \
48	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
49	} while (0)
50
51	#define nbar_width ns[0] // progress bar width
52	#define nbar_height ns[1] // progress bar height
53	#define nbar_posx ns[2] // progress bar horizontal position
54	#define nbar_posy ns[3] // progress bar vertical position
55	#define nbar_colr ns[4] // progress bar color red component
56	#define nbar_colg ns[5] // progress bar color green component
57	#define nbar_colb ns[6] // progress bar color blue component
58
59	#if DEBUG
60	#define DEBUG_MESSAGE(strMessage, args...) \
61	if (G.bdebug_messages) { \
62	fprintf(G.logfile_fd, "[%s][%s] - %s\n", \
63	__FILE__, __FUNCTION__, strMessage); \
64	}
65	#else
66	#define DEBUG_MESSAGE(...) ((void)0)
67	#endif
68
69
70	/**
71	* Open and initialize the framebuffer device
72	* \param *strfb_device pointer to framebuffer device
73	*/
74	static void fb_open(const char *strfb_device)
75	{
76	int fbfd = xopen(strfb_device, O_RDWR);
77
78	// framebuffer properties
79	xioctl(fbfd, FBIOGET_VSCREENINFO, &G.scr_var);
80	xioctl(fbfd, FBIOGET_FSCREENINFO, &G.scr_fix);
81
82	if (G.scr_var.bits_per_pixel != 16)
83	bb_error_msg_and_die("only 16 bpp is supported");
84
85	// map the device in memory
86	G.addr = mmap(NULL,
87	G.scr_var.xres * G.scr_var.yres
88	* BYTES_PER_PIXEL /(G.scr_var.bits_per_pixel / 8)/ ,
89	PROT_WRITE, MAP_SHARED, fbfd, 0);
90	if (G.addr == MAP_FAILED)
91	bb_perror_msg_and_die("can't mmap %s", strfb_device);
92	close(fbfd);
93	}
94
95
96	/**
97	* Draw hollow rectangle on framebuffer
98	*/
99	static void fb_drawrectangle(void)
100	{
101	int cnt;
102	DATA thispix;
103	DATA ptr1, ptr2;
104	unsigned char nred = G.nbar_colr/2;
105	unsigned char ngreen = G.nbar_colg/2;
106	unsigned char nblue = G.nbar_colb/2;
107
108	nred >>= 3; // 5-bit red
109	ngreen >>= 2; // 6-bit green
110	nblue >>= 3; // 5-bit blue
111	thispix = nblue + (ngreen << 5) + (nred << (5+6));
112
113	// horizontal lines
114	ptr1 = (DATA)(G.addr + (G.nbar_posy G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
115	ptr2 = (DATA)(G.addr + ((G.nbar_posy + G.nbar_height - 1) G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
116	cnt = G.nbar_width - 1;
117	do {
118	*ptr1++ = thispix;
119	*ptr2++ = thispix;
120	} while (--cnt >= 0);
121
122	// vertical lines
123	ptr1 = (DATA)(G.addr + (G.nbar_posy G.scr_var.xres + G.nbar_posx) * BYTES_PER_PIXEL);
124	ptr2 = (DATA)(G.addr + (G.nbar_posy G.scr_var.xres + G.nbar_posx + G.nbar_width - 1) * BYTES_PER_PIXEL);
125	cnt = G.nbar_posy + G.nbar_height - 1 - G.nbar_posy;
126	do {
127	*ptr1 = thispix; ptr1 += G.scr_var.xres;
128	*ptr2 = thispix; ptr2 += G.scr_var.xres;
129	} while (--cnt >= 0);
130	}
131
132
133	/**
134	* Draw filled rectangle on framebuffer
135	* \param nx1pos,ny1pos upper left position
136	* \param nx2pos,ny2pos down right position
137	* \param nred,ngreen,nblue rgb color
138	*/
139	static void fb_drawfullrectangle(int nx1pos, int ny1pos, int nx2pos, int ny2pos,
140	unsigned char nred, unsigned char ngreen, unsigned char nblue)
141	{
142	int cnt1, cnt2, nypos;
143	DATA thispix;
144	DATA *ptr;
145
146	nred >>= 3; // 5-bit red
147	ngreen >>= 2; // 6-bit green
148	nblue >>= 3; // 5-bit blue
149	thispix = nblue + (ngreen << 5) + (nred << (5+6));
150
151	cnt1 = ny2pos - ny1pos;
152	nypos = ny1pos;
153	do {
154	ptr = (DATA)(G.addr + (nypos G.scr_var.xres + nx1pos) * BYTES_PER_PIXEL);
155	cnt2 = nx2pos - nx1pos;
156	do {
157	*ptr++ = thispix;
158	} while (--cnt2 >= 0);
159
160	nypos++;
161	} while (--cnt1 >= 0);
162	}
163
164
165	/**
166	* Draw a progress bar on framebuffer
167	* \param percent percentage of loading
168	*/
169	static void fb_drawprogressbar(unsigned percent)
170	{
171	int i, left_x, top_y, width, height;
172
173	// outer box
174	left_x = G.nbar_posx;
175	top_y = G.nbar_posy;
176	width = G.nbar_width - 1;
177	height = G.nbar_height - 1;
178	if ((height \| width) < 0)
179	return;
180	// NB: "width" of 1 actually makes rect with width of 2!
181	fb_drawrectangle();
182
183	// inner "empty" rectangle
184	left_x++;
185	top_y++;
186	width -= 2;
187	height -= 2;
188	if ((height \| width) < 0)
189	return;
190	fb_drawfullrectangle(
191	left_x, top_y,
192	left_x + width, top_y + height,
193	G.nbar_colr, G.nbar_colg, G.nbar_colb);
194
195	if (percent > 0) {
196	// actual progress bar
197	width = width * percent / 100;
198	i = height;
199	if (height == 0)
200	height++; // divide by 0 is bad
201	while (i >= 0) {
202	// draw one-line thick "rectangle"
203	// top line will have gray lvl 200, bottom one 100
204	unsigned gray_level = 100 + i*100/height;
205	fb_drawfullrectangle(
206	left_x, top_y, left_x + width, top_y,
207	gray_level, gray_level, gray_level);
208	top_y++;
209	i--;
210	}
211	}
212	}
213
214
215	/**
216	* Draw image from PPM file
217	*/
218	static void fb_drawimage(void)
219	{
220	char head[256];
221	char s[80];
222	FILE *theme_file;
223	unsigned char *pixline;
224	unsigned i, j, width, height, line_size;
225
226	memset(head, 0, sizeof(head));
227	theme_file = xfopen_stdin(G.image_filename);
228
229	// parse ppm header
230	while (1) {
231	if (fgets(s, sizeof(s), theme_file) == NULL)
232	bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
233
234	if (s[0] == '#')
235	continue;
236
237	if (strlen(head) + strlen(s) >= sizeof(head))
238	bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
239
240	strcat(head, s);
241	if (head[0] != 'P' \|\| head[1] != '6')
242	bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
243
244	// width, height, max_color_val
245	if (sscanf(head, "P6 %u %u %u", &width, &height, &i) == 3)
246	break;
247	// TODO: i must be <= 255!
248	}
249
250	line_size = width*3;
251	if (width > G.scr_var.xres)
252	width = G.scr_var.xres;
253	if (height > G.scr_var.yres)
254	height = G.scr_var.yres;
255
256	pixline = xmalloc(line_size);
257	for (j = 0; j < height; j++) {
258	unsigned char *pixel = pixline;
259	DATA src = (DATA )(G.addr + j * G.scr_fix.line_length);
260
261	if (fread(pixline, 1, line_size, theme_file) != line_size)
262	bb_error_msg_and_die("bad PPM file '%s'", G.image_filename);
263	for (i = 0; i < width; i++) {
264	unsigned thispix;
265	thispix = (((unsigned)pixel[0] << 8) & 0xf800)
266	\| (((unsigned)pixel[1] << 3) & 0x07e0)
267	\| (((unsigned)pixel[2] >> 3));
268	*src++ = thispix;
269	pixel += 3;
270	}
271	}
272	free(pixline);
273	fclose(theme_file);
274	}
275
276
277	/**
278	* Parse configuration file
279	* \param *cfg_filename name of the configuration file
280	*/
281	static void init(const char *cfg_filename)
282	{
283	static const char const param_names[] ALIGN1 =
284	"BAR_WIDTH\0" "BAR_HEIGHT\0"
285	"BAR_LEFT\0" "BAR_TOP\0"
286	"BAR_R\0" "BAR_G\0" "BAR_B\0"
287	#if DEBUG
288	"DEBUG\0"
289	#endif
290	;
291	char *token[2];
292	parser_t *parser = config_open2(cfg_filename, xfopen_stdin);
293	while (config_read(parser, token, 2, 2, "#=",
294	(PARSE_NORMAL \| PARSE_MIN_DIE) & ~(PARSE_TRIM \| PARSE_COLLAPSE))) {
295	unsigned val = xatoi_u(token[1]);
296	int i = index_in_strings(param_names, token[0]);
297	if (i < 0)
298	bb_error_msg_and_die("syntax error: '%s'", token[0]);
299	if (i >= 0 && i < 7)
300	G.ns[i] = val;
301	#if DEBUG
302	if (i == 7) {
303	G.bdebug_messages = val;
304	if (G.bdebug_messages)
305	G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
306	}
307	#endif
308	}
309	config_close(parser);
310	}
311
312
313	int fbsplash_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
314	int fbsplash_main(int argc UNUSED_PARAM, char **argv)
315	{
316	const char fb_device, cfg_filename, *fifo_filename;
317	FILE *fp = fp; // for compiler
318	char *num_buf;
319	unsigned num;
320	bool bCursorOff;
321
322	INIT_G();
323
324	// parse command line options
325	fb_device = "/dev/fb0";
326	cfg_filename = NULL;
327	fifo_filename = NULL;
328	bCursorOff = 1 & getopt32(argv, "cs:d:i:f:",
329	&G.image_filename, &fb_device, &cfg_filename, &fifo_filename);
330
331	// parse configuration file
332	if (cfg_filename)
333	init(cfg_filename);
334
335	// We must have -s IMG
336	if (!G.image_filename)
337	bb_show_usage();
338
339	fb_open(fb_device);
340
341	if (fifo_filename && bCursorOff) {
342	// hide cursor (BEFORE any fb ops)
343	full_write(STDOUT_FILENO, "\x1b" "[?25l", 6);
344	}
345
346	fb_drawimage();
347
348	if (!fifo_filename)
349	return EXIT_SUCCESS;
350
351	fp = xfopen_stdin(fifo_filename);
352	if (fp != stdin) {
353	// For named pipes, we want to support this:
354	// mkfifo cmd_pipe
355	// fbsplash -f cmd_pipe .... &
356	// ...
357	// echo 33 >cmd_pipe
358	// ...
359	// echo 66 >cmd_pipe
360	// This means that we don't want fbsplash to get EOF
361	// when last writer closes input end.
362	// The simplest way is to open fifo for writing too
363	// and become an additional writer :)
364	open(fifo_filename, O_WRONLY); // errors are ignored
365	}
366
367	fb_drawprogressbar(0);
368	// Block on read, waiting for some input.
369	// Use of <stdio.h> style I/O allows to correctly
370	// handle a case when we have many buffered lines
371	// already in the pipe
372	while ((num_buf = xmalloc_fgetline(fp)) != NULL) {
373	if (strncmp(num_buf, "exit", 4) == 0) {
374	DEBUG_MESSAGE("exit");
375	break;
376	}
377	num = atoi(num_buf);
378	if (isdigit(num_buf[0]) && (num <= 100)) {
379	#if DEBUG
380	char strVal[10];
381	sprintf(strVal, "%d", num);
382	DEBUG_MESSAGE(strVal);
383	#endif
384	fb_drawprogressbar(num);
385	}
386	free(num_buf);
387	}
388
389	if (bCursorOff) // restore cursor
390	full_write(STDOUT_FILENO, "\x1b" "[?25h", 6);
391
392	return EXIT_SUCCESS;
393	}