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658f29a5 | 1 | /* |
cd296721 | 2 | * Copyright 2011 The Chromium Authors, All Rights Reserved. |
658f29a5 JB |
3 | * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc. |
4 | * | |
cd296721 SW |
5 | * util_is_printable_string contributed by |
6 | * Pantelis Antoniou <pantelis.antoniou AT gmail.com> | |
7 | * | |
658f29a5 JB |
8 | * This program is free software; you can redistribute it and/or |
9 | * modify it under the terms of the GNU General Public License as | |
10 | * published by the Free Software Foundation; either version 2 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
16 | * General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License | |
19 | * along with this program; if not, write to the Free Software | |
20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
21 | * USA | |
22 | */ | |
23 | ||
cd296721 | 24 | #include <ctype.h> |
658f29a5 JB |
25 | #include <stdio.h> |
26 | #include <stdlib.h> | |
27 | #include <stdarg.h> | |
28 | #include <string.h> | |
cd296721 SW |
29 | #include <assert.h> |
30 | ||
31 | #include <errno.h> | |
32 | #include <fcntl.h> | |
33 | #include <unistd.h> | |
658f29a5 | 34 | |
cd296721 | 35 | #include "libfdt.h" |
658f29a5 | 36 | #include "util.h" |
73ab39b1 | 37 | #include "version_gen.h" |
658f29a5 JB |
38 | |
39 | char *xstrdup(const char *s) | |
40 | { | |
41 | int len = strlen(s) + 1; | |
47605971 | 42 | char *d = xmalloc(len); |
658f29a5 | 43 | |
47605971 | 44 | memcpy(d, s, len); |
658f29a5 | 45 | |
47605971 | 46 | return d; |
658f29a5 JB |
47 | } |
48 | ||
49 | char *join_path(const char *path, const char *name) | |
50 | { | |
51 | int lenp = strlen(path); | |
52 | int lenn = strlen(name); | |
53 | int len; | |
54 | int needslash = 1; | |
55 | char *str; | |
56 | ||
57 | len = lenp + lenn + 2; | |
58 | if ((lenp > 0) && (path[lenp-1] == '/')) { | |
59 | needslash = 0; | |
60 | len--; | |
61 | } | |
62 | ||
63 | str = xmalloc(len); | |
64 | memcpy(str, path, lenp); | |
65 | if (needslash) { | |
66 | str[lenp] = '/'; | |
67 | lenp++; | |
68 | } | |
69 | memcpy(str+lenp, name, lenn+1); | |
70 | return str; | |
71 | } | |
cd296721 | 72 | |
47605971 | 73 | bool util_is_printable_string(const void *data, int len) |
cd296721 SW |
74 | { |
75 | const char *s = data; | |
73ab39b1 | 76 | const char *ss, *se; |
cd296721 SW |
77 | |
78 | /* zero length is not */ | |
79 | if (len == 0) | |
80 | return 0; | |
81 | ||
82 | /* must terminate with zero */ | |
83 | if (s[len - 1] != '\0') | |
84 | return 0; | |
85 | ||
73ab39b1 | 86 | se = s + len; |
cd296721 | 87 | |
73ab39b1 GL |
88 | while (s < se) { |
89 | ss = s; | |
47605971 | 90 | while (s < se && *s && isprint((unsigned char)*s)) |
73ab39b1 GL |
91 | s++; |
92 | ||
93 | /* not zero, or not done yet */ | |
94 | if (*s != '\0' || s == ss) | |
95 | return 0; | |
96 | ||
97 | s++; | |
98 | } | |
cd296721 SW |
99 | |
100 | return 1; | |
101 | } | |
102 | ||
103 | /* | |
104 | * Parse a octal encoded character starting at index i in string s. The | |
105 | * resulting character will be returned and the index i will be updated to | |
106 | * point at the character directly after the end of the encoding, this may be | |
107 | * the '\0' terminator of the string. | |
108 | */ | |
109 | static char get_oct_char(const char *s, int *i) | |
110 | { | |
111 | char x[4]; | |
112 | char *endx; | |
113 | long val; | |
114 | ||
115 | x[3] = '\0'; | |
116 | strncpy(x, s + *i, 3); | |
117 | ||
118 | val = strtol(x, &endx, 8); | |
119 | ||
120 | assert(endx > x); | |
121 | ||
122 | (*i) += endx - x; | |
123 | return val; | |
124 | } | |
125 | ||
126 | /* | |
127 | * Parse a hexadecimal encoded character starting at index i in string s. The | |
128 | * resulting character will be returned and the index i will be updated to | |
129 | * point at the character directly after the end of the encoding, this may be | |
130 | * the '\0' terminator of the string. | |
131 | */ | |
132 | static char get_hex_char(const char *s, int *i) | |
133 | { | |
134 | char x[3]; | |
135 | char *endx; | |
136 | long val; | |
137 | ||
138 | x[2] = '\0'; | |
139 | strncpy(x, s + *i, 2); | |
140 | ||
141 | val = strtol(x, &endx, 16); | |
142 | if (!(endx > x)) | |
143 | die("\\x used with no following hex digits\n"); | |
144 | ||
145 | (*i) += endx - x; | |
146 | return val; | |
147 | } | |
148 | ||
149 | char get_escape_char(const char *s, int *i) | |
150 | { | |
151 | char c = s[*i]; | |
152 | int j = *i + 1; | |
153 | char val; | |
154 | ||
155 | assert(c); | |
156 | switch (c) { | |
157 | case 'a': | |
158 | val = '\a'; | |
159 | break; | |
160 | case 'b': | |
161 | val = '\b'; | |
162 | break; | |
163 | case 't': | |
164 | val = '\t'; | |
165 | break; | |
166 | case 'n': | |
167 | val = '\n'; | |
168 | break; | |
169 | case 'v': | |
170 | val = '\v'; | |
171 | break; | |
172 | case 'f': | |
173 | val = '\f'; | |
174 | break; | |
175 | case 'r': | |
176 | val = '\r'; | |
177 | break; | |
178 | case '0': | |
179 | case '1': | |
180 | case '2': | |
181 | case '3': | |
182 | case '4': | |
183 | case '5': | |
184 | case '6': | |
185 | case '7': | |
186 | j--; /* need to re-read the first digit as | |
187 | * part of the octal value */ | |
188 | val = get_oct_char(s, &j); | |
189 | break; | |
190 | case 'x': | |
191 | val = get_hex_char(s, &j); | |
192 | break; | |
193 | default: | |
194 | val = c; | |
195 | } | |
196 | ||
197 | (*i) = j; | |
198 | return val; | |
199 | } | |
200 | ||
73ab39b1 | 201 | int utilfdt_read_err_len(const char *filename, char **buffp, off_t *len) |
cd296721 SW |
202 | { |
203 | int fd = 0; /* assume stdin */ | |
204 | char *buf = NULL; | |
205 | off_t bufsize = 1024, offset = 0; | |
206 | int ret = 0; | |
207 | ||
208 | *buffp = NULL; | |
209 | if (strcmp(filename, "-") != 0) { | |
210 | fd = open(filename, O_RDONLY); | |
211 | if (fd < 0) | |
212 | return errno; | |
213 | } | |
214 | ||
215 | /* Loop until we have read everything */ | |
73ab39b1 | 216 | buf = xmalloc(bufsize); |
cd296721 SW |
217 | do { |
218 | /* Expand the buffer to hold the next chunk */ | |
219 | if (offset == bufsize) { | |
220 | bufsize *= 2; | |
73ab39b1 | 221 | buf = xrealloc(buf, bufsize); |
cd296721 SW |
222 | } |
223 | ||
224 | ret = read(fd, &buf[offset], bufsize - offset); | |
225 | if (ret < 0) { | |
226 | ret = errno; | |
227 | break; | |
228 | } | |
229 | offset += ret; | |
230 | } while (ret != 0); | |
231 | ||
232 | /* Clean up, including closing stdin; return errno on error */ | |
233 | close(fd); | |
234 | if (ret) | |
235 | free(buf); | |
236 | else | |
237 | *buffp = buf; | |
73ab39b1 | 238 | *len = bufsize; |
cd296721 SW |
239 | return ret; |
240 | } | |
241 | ||
73ab39b1 GL |
242 | int utilfdt_read_err(const char *filename, char **buffp) |
243 | { | |
244 | off_t len; | |
245 | return utilfdt_read_err_len(filename, buffp, &len); | |
246 | } | |
247 | ||
248 | char *utilfdt_read_len(const char *filename, off_t *len) | |
cd296721 SW |
249 | { |
250 | char *buff; | |
73ab39b1 | 251 | int ret = utilfdt_read_err_len(filename, &buff, len); |
cd296721 SW |
252 | |
253 | if (ret) { | |
254 | fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename, | |
255 | strerror(ret)); | |
256 | return NULL; | |
257 | } | |
258 | /* Successful read */ | |
259 | return buff; | |
260 | } | |
261 | ||
73ab39b1 GL |
262 | char *utilfdt_read(const char *filename) |
263 | { | |
264 | off_t len; | |
265 | return utilfdt_read_len(filename, &len); | |
266 | } | |
267 | ||
cd296721 SW |
268 | int utilfdt_write_err(const char *filename, const void *blob) |
269 | { | |
270 | int fd = 1; /* assume stdout */ | |
271 | int totalsize; | |
272 | int offset; | |
273 | int ret = 0; | |
274 | const char *ptr = blob; | |
275 | ||
276 | if (strcmp(filename, "-") != 0) { | |
277 | fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666); | |
278 | if (fd < 0) | |
279 | return errno; | |
280 | } | |
281 | ||
282 | totalsize = fdt_totalsize(blob); | |
283 | offset = 0; | |
284 | ||
285 | while (offset < totalsize) { | |
286 | ret = write(fd, ptr + offset, totalsize - offset); | |
287 | if (ret < 0) { | |
288 | ret = -errno; | |
289 | break; | |
290 | } | |
291 | offset += ret; | |
292 | } | |
293 | /* Close the file/stdin; return errno on error */ | |
294 | if (fd != 1) | |
295 | close(fd); | |
296 | return ret < 0 ? -ret : 0; | |
297 | } | |
298 | ||
299 | ||
300 | int utilfdt_write(const char *filename, const void *blob) | |
301 | { | |
302 | int ret = utilfdt_write_err(filename, blob); | |
303 | ||
304 | if (ret) { | |
305 | fprintf(stderr, "Couldn't write blob to '%s': %s\n", filename, | |
306 | strerror(ret)); | |
307 | } | |
308 | return ret ? -1 : 0; | |
309 | } | |
310 | ||
311 | int utilfdt_decode_type(const char *fmt, int *type, int *size) | |
312 | { | |
313 | int qualifier = 0; | |
314 | ||
315 | if (!*fmt) | |
316 | return -1; | |
317 | ||
318 | /* get the conversion qualifier */ | |
319 | *size = -1; | |
320 | if (strchr("hlLb", *fmt)) { | |
321 | qualifier = *fmt++; | |
322 | if (qualifier == *fmt) { | |
323 | switch (*fmt++) { | |
324 | /* TODO: case 'l': qualifier = 'L'; break;*/ | |
325 | case 'h': | |
326 | qualifier = 'b'; | |
327 | break; | |
328 | } | |
329 | } | |
330 | } | |
331 | ||
332 | /* we should now have a type */ | |
333 | if ((*fmt == '\0') || !strchr("iuxs", *fmt)) | |
334 | return -1; | |
335 | ||
336 | /* convert qualifier (bhL) to byte size */ | |
337 | if (*fmt != 's') | |
338 | *size = qualifier == 'b' ? 1 : | |
339 | qualifier == 'h' ? 2 : | |
340 | qualifier == 'l' ? 4 : -1; | |
341 | *type = *fmt++; | |
342 | ||
343 | /* that should be it! */ | |
344 | if (*fmt) | |
345 | return -1; | |
346 | return 0; | |
347 | } | |
73ab39b1 GL |
348 | |
349 | void utilfdt_print_data(const char *data, int len) | |
350 | { | |
351 | int i; | |
352 | const char *p = data; | |
353 | const char *s; | |
354 | ||
355 | /* no data, don't print */ | |
356 | if (len == 0) | |
357 | return; | |
358 | ||
359 | if (util_is_printable_string(data, len)) { | |
360 | printf(" = "); | |
361 | ||
362 | s = data; | |
363 | do { | |
364 | printf("\"%s\"", s); | |
365 | s += strlen(s) + 1; | |
366 | if (s < data + len) | |
367 | printf(", "); | |
368 | } while (s < data + len); | |
369 | ||
370 | } else if ((len % 4) == 0) { | |
371 | const uint32_t *cell = (const uint32_t *)data; | |
372 | ||
373 | printf(" = <"); | |
47605971 | 374 | for (i = 0, len /= 4; i < len; i++) |
73ab39b1 | 375 | printf("0x%08x%s", fdt32_to_cpu(cell[i]), |
47605971 | 376 | i < (len - 1) ? " " : ""); |
73ab39b1 GL |
377 | printf(">"); |
378 | } else { | |
379 | printf(" = ["); | |
380 | for (i = 0; i < len; i++) | |
381 | printf("%02x%s", *p++, i < len - 1 ? " " : ""); | |
382 | printf("]"); | |
383 | } | |
384 | } | |
385 | ||
386 | void util_version(void) | |
387 | { | |
388 | printf("Version: %s\n", DTC_VERSION); | |
389 | exit(0); | |
390 | } | |
391 | ||
392 | void util_usage(const char *errmsg, const char *synopsis, | |
393 | const char *short_opts, struct option const long_opts[], | |
394 | const char * const opts_help[]) | |
395 | { | |
396 | FILE *fp = errmsg ? stderr : stdout; | |
397 | const char a_arg[] = "<arg>"; | |
398 | size_t a_arg_len = strlen(a_arg) + 1; | |
399 | size_t i; | |
400 | int optlen; | |
401 | ||
402 | fprintf(fp, | |
403 | "Usage: %s\n" | |
404 | "\n" | |
405 | "Options: -[%s]\n", synopsis, short_opts); | |
406 | ||
407 | /* prescan the --long opt length to auto-align */ | |
408 | optlen = 0; | |
409 | for (i = 0; long_opts[i].name; ++i) { | |
410 | /* +1 is for space between --opt and help text */ | |
411 | int l = strlen(long_opts[i].name) + 1; | |
412 | if (long_opts[i].has_arg == a_argument) | |
413 | l += a_arg_len; | |
414 | if (optlen < l) | |
415 | optlen = l; | |
416 | } | |
417 | ||
418 | for (i = 0; long_opts[i].name; ++i) { | |
419 | /* helps when adding new applets or options */ | |
420 | assert(opts_help[i] != NULL); | |
421 | ||
422 | /* first output the short flag if it has one */ | |
423 | if (long_opts[i].val > '~') | |
424 | fprintf(fp, " "); | |
425 | else | |
426 | fprintf(fp, " -%c, ", long_opts[i].val); | |
427 | ||
428 | /* then the long flag */ | |
429 | if (long_opts[i].has_arg == no_argument) | |
430 | fprintf(fp, "--%-*s", optlen, long_opts[i].name); | |
431 | else | |
432 | fprintf(fp, "--%s %s%*s", long_opts[i].name, a_arg, | |
433 | (int)(optlen - strlen(long_opts[i].name) - a_arg_len), ""); | |
434 | ||
435 | /* finally the help text */ | |
436 | fprintf(fp, "%s\n", opts_help[i]); | |
437 | } | |
438 | ||
439 | if (errmsg) { | |
440 | fprintf(fp, "\nError: %s\n", errmsg); | |
441 | exit(EXIT_FAILURE); | |
442 | } else | |
443 | exit(EXIT_SUCCESS); | |
444 | } |