diff options
Diffstat (limited to 'cpio/mkbootfs.c')
-rw-r--r-- | cpio/mkbootfs.c | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/cpio/mkbootfs.c b/cpio/mkbootfs.c new file mode 100644 index 000000000..9fe625278 --- /dev/null +++ b/cpio/mkbootfs.c | |||
@@ -0,0 +1,220 @@ | |||
1 | |||
2 | #include <stdio.h> | ||
3 | #include <stdlib.h> | ||
4 | #include <unistd.h> | ||
5 | #include <string.h> | ||
6 | |||
7 | #include <sys/types.h> | ||
8 | #include <sys/stat.h> | ||
9 | #include <dirent.h> | ||
10 | |||
11 | #include <stdarg.h> | ||
12 | #include <fcntl.h> | ||
13 | |||
14 | #include <private/android_filesystem_config.h> | ||
15 | |||
16 | /* NOTES | ||
17 | ** | ||
18 | ** - see buffer-format.txt from the linux kernel docs for | ||
19 | ** an explanation of this file format | ||
20 | ** - dotfiles are ignored | ||
21 | ** - directories named 'root' are ignored | ||
22 | ** - device notes, pipes, etc are not supported (error) | ||
23 | */ | ||
24 | |||
25 | void die(const char *why, ...) | ||
26 | { | ||
27 | va_list ap; | ||
28 | |||
29 | va_start(ap, why); | ||
30 | fprintf(stderr,"error: "); | ||
31 | vfprintf(stderr, why, ap); | ||
32 | fprintf(stderr,"\n"); | ||
33 | va_end(ap); | ||
34 | exit(1); | ||
35 | } | ||
36 | |||
37 | static int verbose = 0; | ||
38 | static int total_size = 0; | ||
39 | |||
40 | static void fix_stat(const char *path, struct stat *s) | ||
41 | { | ||
42 | fs_config(path, S_ISDIR(s->st_mode), &s->st_uid, &s->st_gid, &s->st_mode); | ||
43 | } | ||
44 | |||
45 | static void _eject(struct stat *s, char *out, int olen, char *data, unsigned datasize) | ||
46 | { | ||
47 | while(total_size & 3) { | ||
48 | total_size++; | ||
49 | putchar(0); | ||
50 | } | ||
51 | |||
52 | fix_stat(out, s); | ||
53 | // fprintf(stderr, "_eject %s: mode=0%o\n", out, s->st_mode); | ||
54 | |||
55 | printf("%06x%08x%08x%08x%08x%08x%08x" | ||
56 | "%08x%08x%08x%08x%08x%08x%08x%s%c", | ||
57 | 0x070701, | ||
58 | (unsigned) s->st_ino, | ||
59 | s->st_mode, | ||
60 | 0, // s.st_uid, | ||
61 | 0, // s.st_gid, | ||
62 | 1, // s.st_nlink, | ||
63 | (unsigned) s->st_mtime, | ||
64 | datasize, | ||
65 | 0, // volmajor | ||
66 | 0, // volminor | ||
67 | 0, // devmajor | ||
68 | 0, // devminor, | ||
69 | olen + 1, | ||
70 | 0, | ||
71 | out, | ||
72 | 0 | ||
73 | ); | ||
74 | |||
75 | total_size += 6 + 8*13 + olen + 1; | ||
76 | |||
77 | if(strlen(out) != olen) die("ACK!"); | ||
78 | |||
79 | while(total_size & 3) { | ||
80 | total_size++; | ||
81 | putchar(0); | ||
82 | } | ||
83 | |||
84 | if(datasize) { | ||
85 | fwrite(data, datasize, 1, stdout); | ||
86 | total_size += datasize; | ||
87 | } | ||
88 | } | ||
89 | |||
90 | static void _eject_trailer() | ||
91 | { | ||
92 | struct stat s; | ||
93 | memset(&s, 0, sizeof(s)); | ||
94 | _eject(&s, "TRAILER!!!", 10, 0, 0); | ||
95 | |||
96 | while(total_size & 0xff) { | ||
97 | total_size++; | ||
98 | putchar(0); | ||
99 | } | ||
100 | } | ||
101 | |||
102 | static void _archive(char *in, char *out, int ilen, int olen); | ||
103 | |||
104 | static void _archive_dir(char *in, char *out, int ilen, int olen) | ||
105 | { | ||
106 | int t; | ||
107 | DIR *d; | ||
108 | struct dirent *de; | ||
109 | |||
110 | if(verbose) { | ||
111 | fprintf(stderr,"_archive_dir('%s','%s',%d,%d)\n", | ||
112 | in, out, ilen, olen); | ||
113 | } | ||
114 | |||
115 | d = opendir(in); | ||
116 | if(d == 0) die("cannot open directory '%s'", in); | ||
117 | |||
118 | while((de = readdir(d)) != 0){ | ||
119 | /* xxx: feature? maybe some dotfiles are okay */ | ||
120 | if(de->d_name[0] == '.') continue; | ||
121 | |||
122 | /* xxx: hack. use a real exclude list */ | ||
123 | if(!strcmp(de->d_name, "root")) continue; | ||
124 | |||
125 | t = strlen(de->d_name); | ||
126 | in[ilen] = '/'; | ||
127 | memcpy(in + ilen + 1, de->d_name, t + 1); | ||
128 | |||
129 | if(olen > 0) { | ||
130 | out[olen] = '/'; | ||
131 | memcpy(out + olen + 1, de->d_name, t + 1); | ||
132 | _archive(in, out, ilen + t + 1, olen + t + 1); | ||
133 | } else { | ||
134 | memcpy(out, de->d_name, t + 1); | ||
135 | _archive(in, out, ilen + t + 1, t); | ||
136 | } | ||
137 | |||
138 | in[ilen] = 0; | ||
139 | out[olen] = 0; | ||
140 | } | ||
141 | } | ||
142 | |||
143 | static void _archive(char *in, char *out, int ilen, int olen) | ||
144 | { | ||
145 | struct stat s; | ||
146 | |||
147 | if(verbose) { | ||
148 | fprintf(stderr,"_archive('%s','%s',%d,%d)\n", | ||
149 | in, out, ilen, olen); | ||
150 | } | ||
151 | |||
152 | if(lstat(in, &s)) die("could not stat '%s'\n", in); | ||
153 | |||
154 | if(S_ISREG(s.st_mode)){ | ||
155 | char *tmp; | ||
156 | int fd; | ||
157 | |||
158 | fd = open(in, O_RDONLY); | ||
159 | if(fd < 0) die("cannot open '%s' for read", in); | ||
160 | |||
161 | tmp = (char*) malloc(s.st_size); | ||
162 | if(tmp == 0) die("cannot allocate %d bytes", s.st_size); | ||
163 | |||
164 | if(read(fd, tmp, s.st_size) != s.st_size) { | ||
165 | die("cannot read %d bytes", s.st_size); | ||
166 | } | ||
167 | |||
168 | _eject(&s, out, olen, tmp, s.st_size); | ||
169 | |||
170 | free(tmp); | ||
171 | close(fd); | ||
172 | } else if(S_ISDIR(s.st_mode)) { | ||
173 | _eject(&s, out, olen, 0, 0); | ||
174 | _archive_dir(in, out, ilen, olen); | ||
175 | } else if(S_ISLNK(s.st_mode)) { | ||
176 | char buf[1024]; | ||
177 | int size; | ||
178 | size = readlink(in, buf, 1024); | ||
179 | if(size < 0) die("cannot read symlink '%s'", in); | ||
180 | _eject(&s, out, olen, buf, size); | ||
181 | } else { | ||
182 | die("Unknown '%s' (mode %d)?\n", in, s.st_mode); | ||
183 | } | ||
184 | } | ||
185 | |||
186 | void archive(const char *start, const char *prefix) | ||
187 | { | ||
188 | char in[8192]; | ||
189 | char out[8192]; | ||
190 | |||
191 | strcpy(in, start); | ||
192 | strcpy(out, prefix); | ||
193 | |||
194 | _archive_dir(in, out, strlen(in), strlen(out)); | ||
195 | } | ||
196 | |||
197 | int main(int argc, char *argv[]) | ||
198 | { | ||
199 | argc--; | ||
200 | argv++; | ||
201 | |||
202 | if(argc == 0) die("no directories to process?!"); | ||
203 | |||
204 | while(argc-- > 0){ | ||
205 | char *x = strchr(*argv, '='); | ||
206 | if(x != 0) { | ||
207 | *x++ = 0; | ||
208 | } else { | ||
209 | x = ""; | ||
210 | } | ||
211 | |||
212 | archive(*argv, x); | ||
213 | |||
214 | argv++; | ||
215 | } | ||
216 | |||
217 | _eject_trailer(); | ||
218 | |||
219 | return 0; | ||
220 | } | ||