1 // SPDX-License-Identifier: GPL-2.0+
3 * Copyright (c) 2013, Google Inc.
4 * Written by Simon Glass <sjg@chromium.org>
6 * Perform a grep of an FDT either displaying the source subset or producing
7 * a new .dtb subset which can be used as required.
20 #include <fdt_region.h>
23 #include "libfdt_internal.h"
25 /* Define DEBUG to get some debugging output on stderr */
27 #define debug(a, b...) fprintf(stderr, a, ## b)
29 #define debug(a, b...)
32 /* A linked list of values we are grepping for */
34 int type; /* Types this value matches (FDT_IS... mask) */
35 int include; /* 1 to include matches, 0 to exclude */
36 const char *string; /* String to match */
37 struct value_node *next; /* Pointer to next node, or NULL */
40 /* Output formats we support */
42 OUT_DTS, /* Device tree source */
43 OUT_DTB, /* Valid device tree binary */
44 OUT_BIN, /* Fragment of .dtb, for hashing */
47 /* Holds information which controls our output and options */
49 enum output_t output; /* Output format */
50 int add_aliases; /* Add aliases node to output */
51 int all; /* Display all properties/nodes */
52 int colour; /* Display output in ANSI colour */
53 int region_list; /* Output a region list */
54 int flags; /* Flags (FDT_REG_...) */
55 int list_strings; /* List strings in string table */
56 int show_offset; /* Show offset */
57 int show_addr; /* Show address */
58 int header; /* Output an FDT header */
59 int diff; /* Show +/- diff markers */
60 int include_root; /* Include the root node and all properties */
61 int remove_strings; /* Remove unused strings */
62 int show_dts_version; /* Put '/dts-v1/;' on the first line */
63 int types_inc; /* Mask of types that we include (FDT_IS...) */
64 int types_exc; /* Mask of types that we exclude (FDT_IS...) */
65 int invert; /* Invert polarity of match */
66 struct value_node *value_head; /* List of values to match */
67 const char *output_fname; /* Output filename */
68 FILE *fout; /* File to write dts/dtb output */
71 static void report_error(const char *where, int err)
73 fprintf(stderr, "Error at '%s': %s\n", where, fdt_strerror(err));
76 /* Supported ANSI colours */
91 * print_ansi_colour() - Print out the ANSI sequence for a colour
94 * @col: Colour to output (COL_...), or COL_NONE to reset colour
96 static void print_ansi_colour(FILE *fout, int col)
99 fprintf(fout, "\033[0m");
101 fprintf(fout, "\033[1;%dm", col + 30);
106 * value_add() - Add a new value to our list of things to grep for
108 * @disp: Display structure, holding info about our options
109 * @headp: Pointer to header pointer of list
110 * @type: Type of this value (FDT_IS_...)
111 * @include: 1 if we want to include matches, 0 to exclude
112 * @str: String value to match
114 static int value_add(struct display_info *disp, struct value_node **headp,
115 int type, int include, const char *str)
117 struct value_node *node;
120 * Keep track of which types we are excluding/including. We don't
121 * allow both including and excluding things, because it doesn't make
122 * sense. 'Including' means that everything not mentioned is
123 * excluded. 'Excluding' means that everything not mentioned is
124 * included. So using the two together would be meaningless.
127 disp->types_inc |= type;
129 disp->types_exc |= type;
130 if (disp->types_inc & disp->types_exc & type) {
132 "Cannot use both include and exclude for '%s'\n", str);
139 node = malloc(sizeof(*node));
144 node->include = include;
150 fprintf(stderr, "Out of memory\n");
154 static bool util_is_printable_string(const void *data, int len)
156 const char *s = data;
159 /* zero length is not */
163 /* must terminate with zero */
164 if (s[len - 1] != '\0')
171 while (s < se && *s && isprint((unsigned char)*s))
174 /* not zero, or not done yet */
175 if (*s != '\0' || s == ss)
184 static void utilfdt_print_data(const char *data, int len)
187 const char *p = data;
190 /* no data, don't print */
194 if (util_is_printable_string(data, len)) {
203 } while (s < data + len);
205 } else if ((len % 4) == 0) {
206 const uint32_t *cell = (const uint32_t *)data;
209 for (i = 0, len /= 4; i < len; i++)
210 printf("0x%08x%s", fdt32_to_cpu(cell[i]),
211 i < (len - 1) ? " " : "");
215 for (i = 0; i < len; i++)
216 printf("%02x%s", *p++, i < len - 1 ? " " : "");
222 * display_fdt_by_regions() - Display regions of an FDT source
224 * This dumps an FDT as source, but only certain regions of it. This is the
225 * final stage of the grep - we have a list of regions we want to display,
226 * and this function displays them.
228 * @disp: Display structure, holding info about our options
229 * @blob: FDT blob to display
230 * @region: List of regions to display
231 * @count: Number of regions
233 static int display_fdt_by_regions(struct display_info *disp, const void *blob,
234 struct fdt_region region[], int count)
236 struct fdt_region *reg = region, *reg_end = region + count;
237 uint32_t off_mem_rsvmap = fdt_off_mem_rsvmap(blob);
238 int base = fdt_off_dt_struct(blob);
239 int version = fdt_version(blob);
240 int offset, nextoffset;
241 int tag, depth, shift;
242 FILE *f = disp->fout;
248 if (disp->show_dts_version)
249 fprintf(f, "/dts-v1/;\n");
252 fprintf(f, "// magic:\t\t0x%x\n", fdt_magic(blob));
253 fprintf(f, "// totalsize:\t\t0x%x (%d)\n", fdt_totalsize(blob),
254 fdt_totalsize(blob));
255 fprintf(f, "// off_dt_struct:\t0x%x\n",
256 fdt_off_dt_struct(blob));
257 fprintf(f, "// off_dt_strings:\t0x%x\n",
258 fdt_off_dt_strings(blob));
259 fprintf(f, "// off_mem_rsvmap:\t0x%x\n", off_mem_rsvmap);
260 fprintf(f, "// version:\t\t%d\n", version);
261 fprintf(f, "// last_comp_version:\t%d\n",
262 fdt_last_comp_version(blob));
264 fprintf(f, "// boot_cpuid_phys:\t0x%x\n",
265 fdt_boot_cpuid_phys(blob));
268 fprintf(f, "// size_dt_strings:\t0x%x\n",
269 fdt_size_dt_strings(blob));
272 fprintf(f, "// size_dt_struct:\t0x%x\n",
273 fdt_size_dt_struct(blob));
278 if (disp->flags & FDT_REG_ADD_MEM_RSVMAP) {
279 const struct fdt_reserve_entry *p_rsvmap;
281 p_rsvmap = (const struct fdt_reserve_entry *)
282 ((const char *)blob + off_mem_rsvmap);
284 addr = fdt64_to_cpu(p_rsvmap[i].address);
285 size = fdt64_to_cpu(p_rsvmap[i].size);
286 if (addr == 0 && size == 0)
289 fprintf(f, "/memreserve/ %llx %llx;\n",
290 (unsigned long long)addr,
291 (unsigned long long)size);
297 shift = 4; /* 4 spaces per indent */
299 const struct fdt_property *prop;
307 * Work out the file offset of this offset, and decide
308 * whether it is in the region list or not
310 file_ofs = base + offset;
311 if (reg < reg_end && file_ofs >= reg->offset + reg->size)
313 in_region = reg < reg_end && file_ofs >= reg->offset &&
314 file_ofs < reg->offset + reg->size;
315 tag = fdt_next_tag(blob, offset, &nextoffset);
319 show = in_region || disp->all;
320 if (show && disp->diff)
321 fprintf(f, "%c", in_region ? '+' : '-');
324 /* Do this here to avoid 'if (show)' in every 'case' */
325 if (tag == FDT_BEGIN_NODE)
327 else if (tag == FDT_END_NODE)
331 if (tag != FDT_END) {
333 fprintf(f, "%4x: ", file_ofs);
334 if (disp->show_offset)
335 fprintf(f, "%4x: ", file_ofs - base);
338 /* Green means included, red means excluded */
340 print_ansi_colour(f, in_region ? COL_GREEN : COL_RED);
344 prop = fdt_get_property_by_offset(blob, offset, NULL);
345 name = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
346 fprintf(f, "%*s%s", depth * shift, "", name);
347 utilfdt_print_data(prop->data,
348 fdt32_to_cpu(prop->len));
353 fprintf(f, "%*s// [NOP]", depth * shift, "");
357 name = fdt_get_name(blob, offset, &len);
358 fprintf(f, "%*s%s {", depth++ * shift, "",
363 fprintf(f, "%*s};", --depth * shift, "");
367 /* Reset colour back to normal before end of line */
369 print_ansi_colour(f, COL_NONE);
373 /* Print a list of strings if requested */
374 if (disp->list_strings) {
376 int str_base = fdt_off_dt_strings(blob);
378 for (offset = 0; offset < fdt_size_dt_strings(blob);
379 offset += strlen(str) + 1) {
380 str = fdt_string(blob, offset);
381 int len = strlen(str) + 1;
384 /* Only print strings that are in the region */
385 file_ofs = str_base + offset;
386 in_region = reg < reg_end &&
387 file_ofs >= reg->offset &&
388 file_ofs + len < reg->offset +
390 show = in_region || disp->all;
391 if (show && disp->diff)
392 printf("%c", in_region ? '+' : '-');
394 printf("%4x: ", file_ofs);
395 if (disp->show_offset)
396 printf("%4x: ", offset);
405 * dump_fdt_regions() - Dump regions of an FDT as binary data
407 * This dumps an FDT as binary, but only certain regions of it. This is the
408 * final stage of the grep - we have a list of regions we want to dump,
409 * and this function dumps them.
411 * The output of this function may or may not be a valid FDT. To ensure it
412 * is, these disp->flags must be set:
414 * FDT_REG_SUPERNODES: ensures that subnodes are preceded by their
415 * parents. Without this option, fragments of subnode data may be
416 * output without the supernodes above them. This is useful for
417 * hashing but cannot produce a valid FDT.
418 * FDT_REG_ADD_STRING_TAB: Adds a string table to the end of the FDT.
419 * Without this none of the properties will have names
420 * FDT_REG_ADD_MEM_RSVMAP: Adds a mem_rsvmap table - an FDT is invalid
423 * @disp: Display structure, holding info about our options
424 * @blob: FDT blob to display
425 * @region: List of regions to display
426 * @count: Number of regions
427 * @out: Output destination
429 static int dump_fdt_regions(struct display_info *disp, const void *blob,
430 struct fdt_region region[], int count, char *out)
432 struct fdt_header *fdt;
433 int size, struct_start;
437 /* Set up a basic header (even if we don't actually write it) */
438 fdt = (struct fdt_header *)out;
439 memset(fdt, '\0', sizeof(*fdt));
440 fdt_set_magic(fdt, FDT_MAGIC);
441 struct_start = FDT_ALIGN(sizeof(struct fdt_header),
442 sizeof(struct fdt_reserve_entry));
443 fdt_set_off_mem_rsvmap(fdt, struct_start);
444 fdt_set_version(fdt, FDT_LAST_SUPPORTED_VERSION);
445 fdt_set_last_comp_version(fdt, FDT_FIRST_SUPPORTED_VERSION);
448 * Calculate the total size of the regions we are writing out. The
449 * first will be the mem_rsvmap if the FDT_REG_ADD_MEM_RSVMAP flag
450 * is set. The last will be the string table if FDT_REG_ADD_STRING_TAB
453 for (i = size = 0; i < count; i++)
454 size += region[i].size;
456 /* Bring in the mem_rsvmap section from the old file if requested */
457 if (count > 0 && (disp->flags & FDT_REG_ADD_MEM_RSVMAP)) {
458 struct_start += region[0].size;
459 size -= region[0].size;
461 fdt_set_off_dt_struct(fdt, struct_start);
463 /* Update the header to have the correct offsets/sizes */
464 if (count >= 2 && (disp->flags & FDT_REG_ADD_STRING_TAB)) {
467 str_size = region[count - 1].size;
468 fdt_set_size_dt_struct(fdt, size - str_size);
469 fdt_set_off_dt_strings(fdt, struct_start + size - str_size);
470 fdt_set_size_dt_strings(fdt, str_size);
471 fdt_set_totalsize(fdt, struct_start + size);
474 /* Write the header if required */
478 while (ptr < fdt_off_mem_rsvmap(fdt))
482 /* Output all the nodes including any mem_rsvmap/string table */
483 for (i = 0; i < count; i++) {
484 struct fdt_region *reg = ®ion[i];
486 memcpy(out + ptr, (const char *)blob + reg->offset, reg->size);
494 * show_region_list() - Print out a list of regions
496 * The list includes the region offset (absolute offset from start of FDT
497 * blob in bytes) and size
499 * @reg: List of regions to print
500 * @count: Number of regions
502 static void show_region_list(struct fdt_region *reg, int count)
506 printf("Regions: %d\n", count);
507 for (i = 0; i < count; i++, reg++) {
508 printf("%d: %-10x %-10x\n", i, reg->offset,
509 reg->offset + reg->size);
513 static int check_type_include(void *priv, int type, const char *data, int size)
515 struct display_info *disp = priv;
516 struct value_node *val;
517 int match, none_match = FDT_IS_ANY;
519 /* If none of our conditions mention this type, we know nothing */
520 debug("type=%x, data=%s\n", type, data ? data : "(null)");
521 if (!((disp->types_inc | disp->types_exc) & type)) {
522 debug(" - not in any condition\n");
527 * Go through the list of conditions. For inclusive conditions, we
528 * return 1 at the first match. For exclusive conditions, we must
529 * check that there are no matches.
532 for (val = disp->value_head; val; val = val->next) {
533 if (!(type & val->type))
535 match = fdt_stringlist_contains(data, size,
537 debug(" - val->type=%x, str='%s', match=%d\n",
538 val->type, val->string, match);
539 if (match && val->include) {
540 debug(" - match inc %s\n", val->string);
544 none_match &= ~val->type;
549 * If this is an exclusive condition, and nothing matches, then we
552 if ((type & disp->types_exc) && (none_match & type)) {
553 debug(" - match exc\n");
555 * Allow FDT_IS_COMPAT to make the final decision in the
556 * case where there is no specific type
558 if (type == FDT_IS_NODE && disp->types_exc == FDT_ANY_GLOBAL) {
559 debug(" - supressed exc node\n");
566 * Allow FDT_IS_COMPAT to make the final decision in the
567 * case where there is no specific type (inclusive)
569 if (type == FDT_IS_NODE && disp->types_inc == FDT_ANY_GLOBAL)
572 debug(" - no match, types_inc=%x, types_exc=%x, none_match=%x\n",
573 disp->types_inc, disp->types_exc, none_match);
579 * h_include() - Include handler function for fdt_find_regions()
581 * This function decides whether to include or exclude a node, property or
582 * compatible string. The function is defined by fdt_find_regions().
584 * The algorithm is documented in the code - disp->invert is 0 for normal
585 * operation, and 1 to invert the sense of all matches.
589 static int h_include(void *priv, const void *fdt, int offset, int type,
590 const char *data, int size)
592 struct display_info *disp = priv;
595 inc = check_type_include(priv, type, data, size);
596 if (disp->include_root && type == FDT_IS_PROP && offset == 0 && inc)
600 * If the node name does not tell us anything, check the
603 if (inc == -1 && type == FDT_IS_NODE) {
604 debug(" - checking compatible2\n");
605 data = fdt_getprop(fdt, offset, "compatible", &len);
606 inc = check_type_include(priv, FDT_IS_COMPAT, data, len);
609 /* If we still have no idea, check for properties in the node */
610 if (inc != 1 && type == FDT_IS_NODE &&
611 (disp->types_inc & FDT_NODE_HAS_PROP)) {
612 debug(" - checking node '%s'\n",
613 fdt_get_name(fdt, offset, NULL));
614 for (offset = fdt_first_property_offset(fdt, offset);
615 offset > 0 && inc != 1;
616 offset = fdt_next_property_offset(fdt, offset)) {
617 const struct fdt_property *prop;
620 prop = fdt_get_property_by_offset(fdt, offset, NULL);
623 str = fdt_string(fdt, fdt32_to_cpu(prop->nameoff));
624 inc = check_type_include(priv, FDT_NODE_HAS_PROP, str,
639 debug(" - returning %d\n", inc);
644 static int h_cmp_region(const void *v1, const void *v2)
646 const struct fdt_region *region1 = v1, *region2 = v2;
648 return region1->offset - region2->offset;
651 static int fdtgrep_find_regions(const void *fdt,
652 int (*include_func)(void *priv, const void *fdt, int offset,
653 int type, const char *data, int size),
654 struct display_info *disp, struct fdt_region *region,
655 int max_regions, char *path, int path_len, int flags)
657 struct fdt_region_state state;
662 ret = fdt_first_region(fdt, include_func, disp,
663 ®ion[count++], path, path_len,
664 disp->flags, &state);
666 ret = fdt_next_region(fdt, include_func, disp,
667 count < max_regions ? ®ion[count] : NULL,
668 path, path_len, disp->flags, &state);
672 if (ret && ret != -FDT_ERR_NOTFOUND)
675 /* Find all the aliases and add those regions back in */
676 if (disp->add_aliases && count < max_regions) {
679 new_count = fdt_add_alias_regions(fdt, region, count,
680 max_regions, &state);
681 if (new_count == -FDT_ERR_NOTFOUND) {
682 /* No alias node found */
683 } else if (new_count < 0) {
685 } else if (new_count <= max_regions) {
687 * The alias regions will now be at the end of the list.
688 * Sort the regions by offset to get things into the
692 qsort(region, count, sizeof(struct fdt_region),
700 int utilfdt_read_err_len(const char *filename, char **buffp, off_t *len)
702 int fd = 0; /* assume stdin */
704 off_t bufsize = 1024, offset = 0;
708 if (strcmp(filename, "-") != 0) {
709 fd = open(filename, O_RDONLY);
714 /* Loop until we have read everything */
715 buf = malloc(bufsize);
719 /* Expand the buffer to hold the next chunk */
720 if (offset == bufsize) {
722 buf = realloc(buf, bufsize);
727 ret = read(fd, &buf[offset], bufsize - offset);
735 /* Clean up, including closing stdin; return errno on error */
745 int utilfdt_read_err(const char *filename, char **buffp)
748 return utilfdt_read_err_len(filename, buffp, &len);
751 char *utilfdt_read_len(const char *filename, off_t *len)
754 int ret = utilfdt_read_err_len(filename, &buff, len);
757 fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename,
761 /* Successful read */
765 char *utilfdt_read(const char *filename)
768 return utilfdt_read_len(filename, &len);
772 * Run the main fdtgrep operation, given a filename and valid arguments
774 * @param disp Display information / options
775 * @param filename Filename of blob file
776 * @param return 0 if ok, -ve on error
778 static int do_fdtgrep(struct display_info *disp, const char *filename)
780 struct fdt_region *region = NULL;
787 blob = utilfdt_read(filename);
790 ret = fdt_check_header(blob);
792 fprintf(stderr, "Error: %s\n", fdt_strerror(ret));
796 /* Allow old files, but they are untested */
797 if (fdt_version(blob) < 17 && disp->value_head) {
799 "Warning: fdtgrep does not fully support version %d files\n",
804 * We do two passes, since we don't know how many regions we need.
805 * The first pass will count the regions, but if it is too many,
806 * we do another pass to actually record them.
808 for (i = 0; i < 2; i++) {
809 region = realloc(region, count * sizeof(struct fdt_region));
811 fprintf(stderr, "Out of memory for %d regions\n",
816 count = fdtgrep_find_regions(blob,
818 region, max_regions, path, sizeof(path),
821 report_error("fdt_find_regions", count);
825 if (count <= max_regions)
828 if (count > max_regions) {
830 fprintf(stderr, "Internal error with fdtgrep_find_region()\n");
834 /* Optionally print a list of regions */
835 if (disp->region_list)
836 show_region_list(region, count);
838 /* Output either source .dts or binary .dtb */
839 if (disp->output == OUT_DTS) {
840 ret = display_fdt_by_regions(disp, blob, region, count);
843 /* Allow reserved memory section to expand slightly */
844 int size = fdt_totalsize(blob) + 16;
848 fprintf(stderr, "Out_of_memory\n");
852 size = dump_fdt_regions(disp, blob, region, count, fdt);
853 if (disp->remove_strings) {
858 fprintf(stderr, "Out_of_memory\n");
862 ret = fdt_remove_unused_strings(fdt, out);
865 "Failed to remove unused strings: err=%d\n",
873 fprintf(stderr, "Failed to pack: err=%d\n",
877 size = fdt_totalsize(fdt);
880 if (size != fwrite(fdt, 1, size, disp->fout)) {
881 fprintf(stderr, "Write failure, %d bytes\n", size);
895 static const char usage_synopsis[] =
896 "fdtgrep - extract portions from device tree\n"
899 " fdtgrep <options> <dt file>|-\n\n"
900 "Output formats are:\n"
901 "\tdts - device tree soure text\n"
902 "\tdtb - device tree blob (sets -Hmt automatically)\n"
903 "\tbin - device tree fragment (may not be a valid .dtb)";
905 /* Helper for usage_short_opts string constant */
906 #define USAGE_COMMON_SHORT_OPTS "hV"
908 /* Helper for aligning long_opts array */
909 #define a_argument required_argument
911 /* Helper for usage_long_opts option array */
912 #define USAGE_COMMON_LONG_OPTS \
913 {"help", no_argument, NULL, 'h'}, \
914 {"version", no_argument, NULL, 'V'}, \
915 {NULL, no_argument, NULL, 0x0}
917 /* Helper for usage_opts_help array */
918 #define USAGE_COMMON_OPTS_HELP \
919 "Print this help and exit", \
920 "Print version and exit", \
923 /* Helper for getopt case statements */
924 #define case_USAGE_COMMON_FLAGS \
925 case 'h': usage(NULL); \
927 case 'V': util_version(); \
929 case '?': usage("unknown option");
931 static const char usage_short_opts[] =
932 "haAc:b:C:defg:G:HIlLmn:N:o:O:p:P:rRsStTv"
933 USAGE_COMMON_SHORT_OPTS;
934 static struct option const usage_long_opts[] = {
935 {"show-address", no_argument, NULL, 'a'},
936 {"colour", no_argument, NULL, 'A'},
937 {"include-node-with-prop", a_argument, NULL, 'b'},
938 {"include-compat", a_argument, NULL, 'c'},
939 {"exclude-compat", a_argument, NULL, 'C'},
940 {"diff", no_argument, NULL, 'd'},
941 {"enter-node", no_argument, NULL, 'e'},
942 {"show-offset", no_argument, NULL, 'f'},
943 {"include-match", a_argument, NULL, 'g'},
944 {"exclude-match", a_argument, NULL, 'G'},
945 {"show-header", no_argument, NULL, 'H'},
946 {"show-version", no_argument, NULL, 'I'},
947 {"list-regions", no_argument, NULL, 'l'},
948 {"list-strings", no_argument, NULL, 'L'},
949 {"include-mem", no_argument, NULL, 'm'},
950 {"include-node", a_argument, NULL, 'n'},
951 {"exclude-node", a_argument, NULL, 'N'},
952 {"include-prop", a_argument, NULL, 'p'},
953 {"exclude-prop", a_argument, NULL, 'P'},
954 {"remove-strings", no_argument, NULL, 'r'},
955 {"include-root", no_argument, NULL, 'R'},
956 {"show-subnodes", no_argument, NULL, 's'},
957 {"skip-supernodes", no_argument, NULL, 'S'},
958 {"show-stringtab", no_argument, NULL, 't'},
959 {"show-aliases", no_argument, NULL, 'T'},
960 {"out", a_argument, NULL, 'o'},
961 {"out-format", a_argument, NULL, 'O'},
962 {"invert-match", no_argument, NULL, 'v'},
963 USAGE_COMMON_LONG_OPTS,
965 static const char * const usage_opts_help[] = {
967 "Show all nodes/tags, colour those that match",
968 "Include contains containing property",
969 "Compatible nodes to include in grep",
970 "Compatible nodes to exclude in grep",
971 "Diff: Mark matching nodes with +, others with -",
972 "Enter direct subnode names of matching nodes",
974 "Node/property/compatible string to include in grep",
975 "Node/property/compatible string to exclude in grep",
977 "Put \"/dts-v1/;\" on first line of dts output",
978 "Output a region list",
979 "List strings in string table",
980 "Include mem_rsvmap section in binary output",
981 "Node to include in grep",
982 "Node to exclude in grep",
983 "Property to include in grep",
984 "Property to exclude in grep",
985 "Remove unused strings from string table",
986 "Include root node and all properties",
987 "Show all subnodes matching nodes",
988 "Don't include supernodes of matching nodes",
989 "Include string table in binary output",
990 "Include matching aliases in output",
992 "-O <output format>",
993 "Invert the sense of matching (select non-matching lines)",
994 USAGE_COMMON_OPTS_HELP
998 * Call getopt_long() with standard options
1000 * Since all util code runs getopt in the same way, provide a helper.
1002 #define util_getopt_long() getopt_long(argc, argv, usage_short_opts, \
1003 usage_long_opts, NULL)
1005 void util_usage(const char *errmsg, const char *synopsis,
1006 const char *short_opts, struct option const long_opts[],
1007 const char * const opts_help[])
1009 FILE *fp = errmsg ? stderr : stdout;
1010 const char a_arg[] = "<arg>";
1011 size_t a_arg_len = strlen(a_arg) + 1;
1018 "Options: -[%s]\n", synopsis, short_opts);
1020 /* prescan the --long opt length to auto-align */
1022 for (i = 0; long_opts[i].name; ++i) {
1023 /* +1 is for space between --opt and help text */
1024 int l = strlen(long_opts[i].name) + 1;
1025 if (long_opts[i].has_arg == a_argument)
1031 for (i = 0; long_opts[i].name; ++i) {
1032 /* helps when adding new applets or options */
1033 assert(opts_help[i] != NULL);
1035 /* first output the short flag if it has one */
1036 if (long_opts[i].val > '~')
1039 fprintf(fp, " -%c, ", long_opts[i].val);
1041 /* then the long flag */
1042 if (long_opts[i].has_arg == no_argument) {
1043 fprintf(fp, "--%-*s", optlen, long_opts[i].name);
1045 fprintf(fp, "--%s %s%*s", long_opts[i].name, a_arg,
1046 (int)(optlen - strlen(long_opts[i].name) -
1050 /* finally the help text */
1051 fprintf(fp, "%s\n", opts_help[i]);
1055 fprintf(fp, "\nError: %s\n", errmsg);
1063 * Show usage and exit
1065 * If you name all your usage variables with usage_xxx, then you can call this
1066 * help macro rather than expanding all arguments yourself.
1068 * @param errmsg If non-NULL, an error message to display
1070 #define usage(errmsg) \
1071 util_usage(errmsg, usage_synopsis, usage_short_opts, \
1072 usage_long_opts, usage_opts_help)
1074 void util_version(void)
1076 printf("Version: %s\n", "(U-Boot)");
1080 static void scan_args(struct display_info *disp, int argc, char *argv[])
1084 while ((opt = util_getopt_long()) != EOF) {
1089 case_USAGE_COMMON_FLAGS
1092 disp->show_addr = 1;
1098 type = FDT_NODE_HAS_PROP;
1104 type = FDT_IS_COMPAT;
1110 disp->flags |= FDT_REG_DIRECT_SUBNODES;
1113 disp->show_offset = 1;
1119 type = FDT_ANY_GLOBAL;
1125 disp->region_list = 1;
1128 disp->list_strings = 1;
1131 disp->flags |= FDT_REG_ADD_MEM_RSVMAP;
1140 disp->output_fname = optarg;
1143 if (!strcmp(optarg, "dtb"))
1144 disp->output = OUT_DTB;
1145 else if (!strcmp(optarg, "dts"))
1146 disp->output = OUT_DTS;
1147 else if (!strcmp(optarg, "bin"))
1148 disp->output = OUT_BIN;
1150 usage("Unknown output format");
1159 disp->remove_strings = 1;
1162 disp->include_root = 1;
1165 disp->flags |= FDT_REG_ALL_SUBNODES;
1168 disp->flags &= ~FDT_REG_SUPERNODES;
1171 disp->flags |= FDT_REG_ADD_STRING_TAB;
1174 disp->add_aliases = 1;
1180 disp->show_dts_version = 1;
1184 if (type && value_add(disp, &disp->value_head, type, inc,
1186 usage("Cannot add value");
1189 if (disp->invert && disp->types_exc)
1190 usage("-v has no meaning when used with 'exclude' conditions");
1193 int main(int argc, char *argv[])
1195 char *filename = NULL;
1196 struct display_info disp;
1200 memset(&disp, '\0', sizeof(disp));
1201 disp.flags = FDT_REG_SUPERNODES; /* Default flags */
1203 scan_args(&disp, argc, argv);
1205 /* Show matched lines in colour if we can */
1206 disp.colour = disp.all && isatty(0);
1208 /* Any additional arguments can match anything, just like -g */
1209 while (optind < argc - 1) {
1210 if (value_add(&disp, &disp.value_head, FDT_IS_ANY, 1,
1212 usage("Cannot add value");
1216 filename = argv[optind++];
1218 usage("Missing filename");
1220 /* If a valid .dtb is required, set flags to ensure we get one */
1221 if (disp.output == OUT_DTB) {
1223 disp.flags |= FDT_REG_ADD_MEM_RSVMAP | FDT_REG_ADD_STRING_TAB;
1226 if (disp.output_fname) {
1227 disp.fout = fopen(disp.output_fname, "w");
1229 usage("Cannot open output file");
1234 /* Run the grep and output the results */
1235 ret = do_fdtgrep(&disp, filename);
1236 if (disp.output_fname)