mkinitrd-6_2_0/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	niro	816	/* 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			}