1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Copyright 2011 The Chromium Authors, All Rights Reserved.
4 * Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
6 * util_is_printable_string contributed by
7 * Pantelis Antoniou <pantelis.antoniou AT gmail.com>
24 #include "version_gen.h"
26 char *xstrdup(const char *s)
28 int len = strlen(s) + 1;
29 char *d = xmalloc(len);
36 char *xstrndup(const char *s, size_t n)
38 size_t len = strnlen(s, n) + 1;
39 char *d = xmalloc(len);
41 memcpy(d, s, len - 1);
47 int xavsprintf_append(char **strp, const char *fmt, va_list ap)
49 int n, size = 0; /* start with 128 bytes */
58 n = vsnprintf(NULL, 0, fmt, ap_copy) + 1;
61 p = xrealloc(p, size + n);
63 n = vsnprintf(p + size, n, fmt, ap);
69 int xasprintf_append(char **strp, const char *fmt, ...)
75 n = xavsprintf_append(strp, fmt, ap);
81 int xasprintf(char **strp, const char *fmt, ...)
89 n = xavsprintf_append(strp, fmt, ap);
95 char *join_path(const char *path, const char *name)
97 int lenp = strlen(path);
98 int lenn = strlen(name);
103 len = lenp + lenn + 2;
104 if ((lenp > 0) && (path[lenp-1] == '/')) {
110 memcpy(str, path, lenp);
115 memcpy(str+lenp, name, lenn+1);
119 bool util_is_printable_string(const void *data, int len)
121 const char *s = data;
124 /* zero length is not */
128 /* must terminate with zero */
129 if (s[len - 1] != '\0')
136 while (s < se && *s && isprint((unsigned char)*s))
139 /* not zero, or not done yet */
140 if (*s != '\0' || s == ss)
150 * Parse a octal encoded character starting at index i in string s. The
151 * resulting character will be returned and the index i will be updated to
152 * point at the character directly after the end of the encoding, this may be
153 * the '\0' terminator of the string.
155 static char get_oct_char(const char *s, int *i)
162 strncpy(x, s + *i, 3);
164 val = strtol(x, &endx, 8);
173 * Parse a hexadecimal encoded character starting at index i in string s. The
174 * resulting character will be returned and the index i will be updated to
175 * point at the character directly after the end of the encoding, this may be
176 * the '\0' terminator of the string.
178 static char get_hex_char(const char *s, int *i)
185 strncpy(x, s + *i, 2);
187 val = strtol(x, &endx, 16);
189 die("\\x used with no following hex digits\n");
195 char get_escape_char(const char *s, int *i)
231 j--; /* need to re-read the first digit as
232 * part of the octal value */
233 val = get_oct_char(s, &j);
236 val = get_hex_char(s, &j);
246 int utilfdt_read_err(const char *filename, char **buffp, size_t *len)
248 int fd = 0; /* assume stdin */
250 size_t bufsize = 1024, offset = 0;
254 if (strcmp(filename, "-") != 0) {
255 fd = open(filename, O_RDONLY);
260 /* Loop until we have read everything */
261 buf = xmalloc(bufsize);
263 /* Expand the buffer to hold the next chunk */
264 if (offset == bufsize) {
266 buf = xrealloc(buf, bufsize);
269 ret = read(fd, &buf[offset], bufsize - offset);
277 /* Clean up, including closing stdin; return errno on error */
288 char *utilfdt_read(const char *filename, size_t *len)
291 int ret = utilfdt_read_err(filename, &buff, len);
294 fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename,
298 /* Successful read */
302 int utilfdt_write_err(const char *filename, const void *blob)
304 int fd = 1; /* assume stdout */
308 const char *ptr = blob;
310 if (strcmp(filename, "-") != 0) {
311 fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
316 totalsize = fdt_totalsize(blob);
319 while (offset < totalsize) {
320 ret = write(fd, ptr + offset, totalsize - offset);
327 /* Close the file/stdin; return errno on error */
330 return ret < 0 ? -ret : 0;
334 int utilfdt_write(const char *filename, const void *blob)
336 int ret = utilfdt_write_err(filename, blob);
339 fprintf(stderr, "Couldn't write blob to '%s': %s\n", filename,
345 int utilfdt_decode_type(const char *fmt, int *type, int *size)
352 /* get the conversion qualifier */
354 if (strchr("hlLb", *fmt)) {
356 if (qualifier == *fmt) {
358 /* TODO: case 'l': qualifier = 'L'; break;*/
366 /* we should now have a type */
367 if ((*fmt == '\0') || !strchr("iuxsr", *fmt))
370 /* convert qualifier (bhL) to byte size */
371 if (*fmt != 's' && *fmt != 'r')
372 *size = qualifier == 'b' ? 1 :
373 qualifier == 'h' ? 2 :
374 qualifier == 'l' ? 4 : -1;
377 /* that should be it! */
383 void utilfdt_print_data(const char *data, int len)
388 /* no data, don't print */
392 if (util_is_printable_string(data, len)) {
401 } while (s < data + len);
403 } else if ((len % 4) == 0) {
404 const fdt32_t *cell = (const fdt32_t *)data;
407 for (i = 0, len /= 4; i < len; i++)
408 printf("0x%08" PRIx32 "%s", fdt32_to_cpu(cell[i]),
409 i < (len - 1) ? " " : "");
412 const unsigned char *p = (const unsigned char *)data;
414 for (i = 0; i < len; i++)
415 printf("%02x%s", *p++, i < len - 1 ? " " : "");
420 void NORETURN util_version(void)
422 printf("Version: %s\n", DTC_VERSION);
426 void NORETURN util_usage(const char *errmsg, const char *synopsis,
427 const char *short_opts,
428 struct option const long_opts[],
429 const char * const opts_help[])
431 FILE *fp = errmsg ? stderr : stdout;
432 const char a_arg[] = "<arg>";
433 size_t a_arg_len = strlen(a_arg) + 1;
440 "Options: -[%s]\n", synopsis, short_opts);
442 /* prescan the --long opt length to auto-align */
444 for (i = 0; long_opts[i].name; ++i) {
445 /* +1 is for space between --opt and help text */
446 int l = strlen(long_opts[i].name) + 1;
447 if (long_opts[i].has_arg == a_argument)
453 for (i = 0; long_opts[i].name; ++i) {
454 /* helps when adding new applets or options */
455 assert(opts_help[i] != NULL);
457 /* first output the short flag if it has one */
458 if (long_opts[i].val > '~')
461 fprintf(fp, " -%c, ", long_opts[i].val);
463 /* then the long flag */
464 if (long_opts[i].has_arg == no_argument)
465 fprintf(fp, "--%-*s", optlen, long_opts[i].name);
467 fprintf(fp, "--%s %s%*s", long_opts[i].name, a_arg,
468 (int)(optlen - strlen(long_opts[i].name) - a_arg_len), "");
470 /* finally the help text */
471 fprintf(fp, "%s\n", opts_help[i]);
475 fprintf(fp, "\nError: %s\n", errmsg);