1 /*
2  * Copyright (c) 2021 Omar Polo <op@omarpolo.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 /*
18  * pagebundler converts the given file into a valid C program that can
19  * be compiled.  The generated code provides a variable that holds the
20  * original file.
21  *
22  * Usage: pagebundler -f file -v varname > outfile
23  */
24 
25 #include <errno.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <string.h>
29 #include <unistd.h>
30 
31 const char *file;
32 const char *varname;
33 
34 int
35 main(int argc, char **argv)
36 {
37 	size_t len, r, i;
38 	int ch;
39 	FILE *f;
40 	uint8_t buf[64];
41 
42 	while ((ch = getopt(argc, argv, "f:v:")) != -1) {
43 		switch (ch) {
44 		case 'f':
45 			file = optarg;
46 			break;
47 		case 'v':
48 			varname = optarg;
49 			break;
50 		default:
51 			fprintf(stderr, "%s: wrong usage\n",
52 			    argv[0]);
53 			return 1;
54 		}
55 	}
56 
57 	if (file == NULL || varname == NULL) {
58 		fprintf(stderr, "%s: wrong usage\n", argv[0]);
59 		return 1;
60 	}
61 
62 	if ((f = fopen(file, "r")) == NULL) {
63 		fprintf(stderr, "%s: can't open %s: %s",
64 		    argv[0], file, strerror(errno));
65 	}
66 
67         printf("const uint8_t %s[] = {\n", varname);
68 
69 	len = 0;
70         for (;;) {
71 		r = fread(buf, 1, sizeof(buf), f);
72 		len += r;
73 
74 		printf("\t");
75 		for (i = 0; i < r; ++i) {
76 			printf("0x%x, ", buf[i]);
77 		}
78 		printf("\n");
79 
80 		if (r != sizeof(buf))
81 			break;
82 	}
83 
84 	len++;
85 	printf("\t0x00\n");
86 	printf("}; /* %s */\n", varname);
87 
88 	printf("size_t %s_len = %zu;\n", varname, len);
89 
90 	fclose(f);
91 	return 0;
92 }