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Commit | Line | Data |
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eb63b9b8 KZ |
1 | /* |
2 | * mkfs.bfs - Create SCO BFS filesystem - aeb, 1999-09-07 | |
3 | * | |
4 | * Usage: mkfs.bfs [-N nr-of-inodes] [-V volume-name] [-F fsname] device | |
5 | */ | |
6 | ||
7 | #include <stdio.h> | |
8 | #include <stdlib.h> | |
9 | #include <unistd.h> | |
10 | #include <stdarg.h> | |
11 | #include <sys/types.h> | |
12 | #include <sys/stat.h> | |
13 | #include <sys/ioctl.h> | |
14 | #include <fcntl.h> | |
15 | #include <errno.h> | |
16 | #include <string.h> | |
17 | #include <time.h> | |
66ee8158 | 18 | #include "nls.h" |
eb63b9b8 | 19 | |
22853e4a KZ |
20 | /* cannot include <linux/fs.h> */ |
21 | #ifndef BLKGETSIZE | |
22 | #define BLKGETSIZE _IO(0x12,96) /* return device size */ | |
23 | #endif | |
eb63b9b8 | 24 | |
eb63b9b8 KZ |
25 | #define BFS_ROOT_INO 2 |
26 | #define BFS_NAMELEN 14 | |
27 | #define BFS_BLOCKSIZE 512 | |
28 | #define BFS_SUPER_MAGIC 0x1badface | |
29 | ||
30 | /* superblock - 512 bytes */ | |
31 | struct bfssb { | |
32 | unsigned int s_magic; | |
33 | unsigned int s_start; /* byte offset of start of data */ | |
34 | unsigned int s_end; /* sizeof(slice)-1 */ | |
35 | ||
36 | /* for recovery during compaction */ | |
37 | int s_from, s_to; /* src and dest block of current transfer */ | |
38 | int s_backup_from, s_backup_to; | |
39 | ||
40 | /* labels - may well contain garbage */ | |
41 | char s_fsname[6]; | |
42 | char s_volume[6]; | |
43 | char s_pad[472]; | |
44 | }; | |
45 | ||
46 | /* inode - 64 bytes */ | |
47 | struct bfsi { | |
48 | unsigned short i_ino; | |
49 | unsigned char i_pad1[2]; | |
50 | unsigned long i_first_block; | |
51 | unsigned long i_last_block; | |
52 | unsigned long i_bytes_to_end; | |
53 | unsigned long i_type; /* 1: file, 2: the unique dir */ | |
54 | unsigned long i_mode; | |
55 | unsigned long i_uid, i_gid; | |
56 | unsigned long i_nlinks; | |
57 | unsigned long i_atime, i_mtime, i_ctime; | |
58 | unsigned char i_pad2[16]; | |
59 | }; | |
60 | ||
61 | #define BFS_DIR_TYPE 2 | |
62 | ||
63 | /* directory entry - 16 bytes */ | |
64 | struct bfsde { | |
65 | unsigned short d_ino; | |
66 | char d_name[BFS_NAMELEN]; | |
67 | }; | |
68 | ||
69 | ||
70 | static char *progname; | |
71 | ||
72 | static void | |
73 | fatal(char *s, ...) { | |
74 | va_list p; | |
75 | ||
76 | va_start(p, s); | |
77 | fflush(stdout); | |
78 | fprintf(stderr, "\n%s: ", progname); | |
79 | vfprintf(stderr, s, p); | |
80 | va_end(p); | |
81 | fprintf(stderr, "\n"); | |
82 | exit(1); | |
83 | } | |
84 | ||
85 | static void | |
86 | usage(void) { | |
66ee8158 | 87 | fprintf(stderr, _( |
eb63b9b8 | 88 | "Usage: %s [-v] [-N nr-of-inodes] [-V volume-name]\n" |
66ee8158 | 89 | " [-F fsname] device [block-count]\n"), |
eb63b9b8 KZ |
90 | progname); |
91 | exit(1); | |
92 | } | |
93 | ||
94 | int | |
95 | main(int argc, char *argv[]) { | |
96 | char *device, *volume, *fsname; | |
97 | int inodes; | |
98 | unsigned long total_blocks, ino_bytes, ino_blocks, data_blocks; | |
99 | unsigned long user_specified_total_blocks = 0; | |
100 | int verbose = 0; | |
101 | int fd; | |
102 | struct bfssb sb; | |
103 | struct bfsi ri; | |
104 | struct bfsde de; | |
105 | struct stat statbuf; | |
106 | time_t now; | |
107 | int c, i, len; | |
108 | char *p; | |
109 | ||
110 | progname = argv[0]; | |
111 | if ((p = strrchr(progname, '/')) != NULL) | |
112 | progname = p+1; | |
113 | ||
114 | if (argc < 2) | |
115 | usage(); | |
116 | ||
117 | if (argc == 2 && | |
118 | (!strcmp(argv[1], "-V") || !strcmp(argv[1], "--version"))) { | |
66ee8158 | 119 | printf(_("%s from %s\n"), progname, util_linux_version); |
eb63b9b8 KZ |
120 | exit(0); |
121 | } | |
122 | ||
123 | volume = fsname = " "; /* is there a default? */ | |
124 | inodes = 0; | |
125 | ||
126 | while (EOF != (c = getopt(argc, argv, "vF:N:V:cl:"))) { | |
127 | switch (c) { | |
128 | case 'N': | |
129 | inodes = atol(optarg); | |
130 | break; | |
131 | ||
132 | case 'V': | |
133 | len = strlen(optarg); | |
134 | if (len <= 0 || len > 6) | |
66ee8158 | 135 | fatal(_("volume name too long")); |
eb63b9b8 KZ |
136 | volume = strdup(optarg); |
137 | break; | |
138 | ||
139 | case 'F': | |
140 | len = strlen(optarg); | |
141 | if (len <= 0 || len > 6) | |
66ee8158 | 142 | fatal(_("fsname name too long")); |
eb63b9b8 KZ |
143 | fsname = strdup(optarg); |
144 | break; | |
145 | ||
146 | case 'v': | |
147 | verbose = 1; | |
148 | break; | |
149 | ||
150 | /* when called via mkfs we may get options c,l,v */ | |
151 | case 'c': | |
152 | case 'l': | |
153 | break; | |
154 | ||
155 | default: | |
156 | usage(); | |
157 | } | |
158 | } | |
159 | ||
160 | if (optind == argc) | |
161 | usage(); | |
162 | ||
163 | device = argv[optind++]; | |
164 | ||
165 | if (stat(device, &statbuf) == -1) { | |
166 | perror(device); | |
66ee8158 | 167 | fatal(_("cannot stat device %s"), device); |
eb63b9b8 KZ |
168 | } |
169 | ||
170 | if (!S_ISBLK(statbuf.st_mode)) | |
66ee8158 | 171 | fatal(_("%s is not a block special device"), device); |
eb63b9b8 KZ |
172 | |
173 | fd = open(device, O_RDWR); | |
174 | if (fd == -1) { | |
175 | perror(device); | |
66ee8158 | 176 | fatal(_("cannot open %s"), device); |
eb63b9b8 KZ |
177 | } |
178 | ||
179 | if (optind == argc-1) | |
180 | user_specified_total_blocks = atoi(argv[optind]); | |
181 | else if (optind != argc) | |
182 | usage(); | |
183 | ||
184 | if (ioctl(fd, BLKGETSIZE, &total_blocks) == -1) { | |
185 | if (!user_specified_total_blocks) { | |
186 | perror("BLKGETSIZE"); | |
66ee8158 | 187 | fatal(_("cannot get size of %s"), device); |
eb63b9b8 KZ |
188 | } |
189 | total_blocks = user_specified_total_blocks; | |
190 | } else if (user_specified_total_blocks) { | |
191 | if (user_specified_total_blocks > total_blocks) | |
66ee8158 | 192 | fatal(_("blocks argument too large, max is %lu"), |
eb63b9b8 KZ |
193 | total_blocks); |
194 | total_blocks = user_specified_total_blocks; | |
195 | } | |
196 | ||
197 | if (!inodes) { | |
198 | /* pick some reasonable default */ | |
199 | inodes = 8*(total_blocks/800); | |
200 | if (inodes < 48) | |
201 | inodes = 48; | |
202 | if (inodes > 512) | |
203 | inodes = 512; | |
204 | } else { | |
205 | /* believe the user */ | |
206 | if (inodes > 512) | |
66ee8158 | 207 | fatal(_("too many inodes - max is 512")); |
eb63b9b8 KZ |
208 | } |
209 | ||
210 | ino_bytes = inodes * sizeof(struct bfsi); | |
211 | ino_blocks = (ino_bytes + BFS_BLOCKSIZE - 1) / BFS_BLOCKSIZE; | |
212 | data_blocks = total_blocks - ino_blocks - 1; | |
213 | ||
214 | /* mimic the behaviour of SCO's mkfs - maybe this limit is needed */ | |
215 | if (data_blocks < 32) | |
66ee8158 | 216 | fatal(_("not enough space, need at least %lu blocks"), |
eb63b9b8 KZ |
217 | ino_blocks + 33); |
218 | ||
219 | memset(&sb, 0, sizeof(sb)); | |
220 | sb.s_magic = BFS_SUPER_MAGIC; | |
221 | sb.s_start = ino_bytes + sizeof(struct bfssb); | |
222 | sb.s_end = total_blocks * BFS_BLOCKSIZE - 1; | |
223 | sb.s_from = sb.s_to = sb.s_backup_from = sb.s_backup_to = -1; | |
224 | memcpy(sb.s_fsname, fsname, 6); | |
225 | memcpy(sb.s_volume, volume, 6); | |
226 | ||
227 | if (verbose) { | |
66ee8158 KZ |
228 | fprintf(stderr, _("Device: %s\n"), device); |
229 | fprintf(stderr, _("Volume: <%-6s>\n"), volume); | |
230 | fprintf(stderr, _("FSname: <%-6s>\n"), fsname); | |
231 | fprintf(stderr, _("BlockSize: %d\n"), BFS_BLOCKSIZE); | |
232 | if (ino_blocks==1) | |
233 | fprintf(stderr, _("Inodes: %d (in 1 block)\n"), | |
234 | inodes); | |
235 | else | |
236 | fprintf(stderr, _("Inodes: %d (in %ld blocks)\n"), | |
237 | inodes, ino_blocks); | |
238 | fprintf(stderr, _("Blocks: %ld\n"), total_blocks); | |
239 | fprintf(stderr, _("Inode end: %d, Data end: %d\n"), | |
eb63b9b8 KZ |
240 | sb.s_start-1, sb.s_end); |
241 | } | |
242 | ||
243 | if (write(fd, &sb, sizeof(sb)) != sizeof(sb)) | |
66ee8158 | 244 | fatal(_("error writing superblock")); |
eb63b9b8 KZ |
245 | |
246 | memset(&ri, 0, sizeof(ri)); | |
247 | ri.i_ino = BFS_ROOT_INO; | |
248 | ri.i_first_block = 1 + ino_blocks; | |
249 | ri.i_last_block = ri.i_first_block + | |
250 | (inodes * sizeof(de) - 1) / BFS_BLOCKSIZE; | |
251 | ri.i_bytes_to_end = ri.i_first_block * BFS_BLOCKSIZE | |
252 | + 2 * sizeof(struct bfsde) - 1; | |
253 | ri.i_type = BFS_DIR_TYPE; | |
254 | ri.i_mode = S_IFDIR | 0755; /* or just 0755 */ | |
255 | ri.i_uid = 0; | |
256 | ri.i_gid = 1; /* random */ | |
257 | ri.i_nlinks = 2; | |
258 | time(&now); | |
259 | ri.i_atime = now; | |
260 | ri.i_mtime = now; | |
261 | ri.i_ctime = now; | |
262 | ||
263 | if (write(fd, &ri, sizeof(ri)) != sizeof(ri)) | |
66ee8158 | 264 | fatal(_("error writing root inode")); |
eb63b9b8 KZ |
265 | |
266 | memset(&ri, 0, sizeof(ri)); | |
267 | for (i=1; i<inodes; i++) | |
268 | if (write(fd, &ri, sizeof(ri)) != sizeof(ri)) | |
66ee8158 | 269 | fatal(_("error writing inode")); |
eb63b9b8 KZ |
270 | |
271 | if (lseek(fd, (1 + ino_blocks)*BFS_BLOCKSIZE, SEEK_SET) == -1) | |
66ee8158 | 272 | fatal(_("seek error")); |
eb63b9b8 KZ |
273 | |
274 | memset(&de, 0, sizeof(de)); | |
275 | de.d_ino = BFS_ROOT_INO; | |
276 | memcpy(de.d_name, ".", 1); | |
277 | if (write(fd, &de, sizeof(de)) != sizeof(de)) | |
66ee8158 | 278 | fatal(_("error writing . entry")); |
eb63b9b8 KZ |
279 | |
280 | memcpy(de.d_name, "..", 2); | |
281 | if (write(fd, &de, sizeof(de)) != sizeof(de)) | |
66ee8158 | 282 | fatal(_("error writing .. entry")); |
eb63b9b8 KZ |
283 | |
284 | if (close(fd) == -1) { | |
285 | perror(device); | |
66ee8158 | 286 | fatal(_("error closing %s"), device); |
eb63b9b8 KZ |
287 | } |
288 | ||
289 | return 0; | |
290 | } |