Fix #20439 - rafind2 -V search for values like in /v ##tools

binr/rafind2/rafind2.c

@@ -1,4 +1,4 @@
-/* radare - LGPL - Copyright 2009-2021 - pancake */
+/* radare - LGPL - Copyright 2009-2022 - pancake */
 
 #include <r_main.h>
 

libr/main/rafind2.c

@@ -34,6 +34,7 @@ typedef struct {
 	RPrint *pr;
 	RList *keywords;
 	const char *mask;
+	const char *valstr;
 	const char *curfile;
 	PJ *pj;
 } RafindOptions;
@@ -188,6 +189,7 @@ static int show_help(const char *argv0, int line) {
 	" -t [to]    stop search at address 'to'\n"
 	" -q         quiet: fewer output do not show headings or filenames.\n"
 	" -v         print version and exit\n"
+	" -V [s:num] search for given value (-V 4:123) // assume local endian\n"
 	" -x [hex]   search for hexpair string (909090) (can be used multiple times)\n"
 	" -X         show hexdump of search results\n"
 	" -z         search for zero-terminated strings\n"
@@ -389,7 +391,7 @@ R_API int r_main_rafind2(int argc, const char **argv) {
 		return show_help (argv[0], 0);
 	}
 	RGetopt opt;
-	r_getopt_init (&opt, argc, argv, "a:ie:b:cjmM:s:S:x:Xzf:F:t:E:rqnhvZL");
+	r_getopt_init (&opt, argc, argv, "a:ie:b:cjmM:s:S:x:Xzf:F:t:E:rqnhvZLV:");
 	while ((c = r_getopt_next (&opt)) != -1) {
 		switch (c) {
 		case 'a':
@@ -487,6 +489,50 @@ R_API int r_main_rafind2(int argc, const char **argv) {
 		case 'q':
 			ro.quiet = true;
 			break;
+		case 'V':
+			{
+				char *arg = strdup (opt.arg);
+				char *colon = strchr (arg, ':');
+				ut8 buf[8] = {0};
+				int size = (R_SYS_BITS & R_SYS_BITS_64)? 8: 4;
+				ut64 value = 0;
+				// TODO: const int endian = R_SYS_ENDIAN;
+				if (colon) {
+					*colon++ = 0;
+					size = atoi (arg);
+					size = R_MIN (8, size);
+					size = R_MAX (1, size);
+					value = r_num_math (NULL, colon);
+				} else {
+					value = r_num_math (NULL, arg);
+				}
+				switch (size) {
+				case 1:
+					buf[0] = value;
+					break;
+				case 2:
+					r_write_le16 (buf, value);
+					break;
+				case 4:
+					r_write_le32 (buf, value);
+					break;
+				case 8:
+					r_write_le64 (buf, value);
+					break;
+				default:
+					R_LOG_ERROR ("Invalid value size. Must be 1, 2, 4 or 8");
+					return 1;
+				}
+				char *hexdata = r_hex_bin2strdup ((ut8*)buf, size);
+				if (hexdata) {
+					ro.align = size;
+					ro.mode = R_SEARCH_KEYWORD;
+					ro.hexstr = true;
+					ro.widestr = false;
+					r_list_append (ro.keywords, (void*)hexdata);
+				}
+			}
+			break;
 		case 'v':
 			return r_main_version_print ("rafind2");
 		case 'h':

libr/search/search.c

@@ -1,9 +1,8 @@
-/* radare - LGPL - Copyright 2008-2016 pancake */
+/* radare - LGPL - Copyright 2008-2022 pancake */
+
+#define R_LOG_ORIGIN "search"
 
 #include <r_search.h>
-#include <r_list.h>
-#include <ctype.h>
-#include <r_util/r_assert.h>
 #include "search.h"
 
 // Experimental search engine (fails, because stops at first hit of every block read
@@ -119,14 +118,14 @@ R_API int r_search_begin(RSearch *s) {
 // use when the size of the hit does not match the size of the keyword (ie: /a{30}/)
 R_IPI int r_search_hit_sz(RSearch *s, RSearchKeyword *kw, ut64 addr, ut32 sz) {
 	if (s->align && (addr%s->align)) {
-		eprintf ("0x%08"PFMT64x" unaligned\n", addr);
+		// eprintf ("0x%08"PFMT64x" unaligned\n", addr);
 		return 1;
 	}
 	if (!s->contiguous) {
 		if (kw->last && addr == kw->last) {
 			kw->count--;
 			kw->last = s->bckwrds? addr: addr + sz;
-			eprintf ("0x%08"PFMT64x" Sequential hit ignored.\n", addr);
+			R_LOG_WARN ("0x%08"PFMT64x" Sequential hit ignored", addr);
 			return 1;
 		}
 	}
@@ -484,7 +483,7 @@ R_IPI int search_kw_update(RSearch *s, ut64 from, const ut8 *buf, int len) {
 
 R_API void r_search_set_distance(RSearch *s, int dist) {
 	if (dist >= R_SEARCH_DISTANCE_MAX) {
-		eprintf ("Invalid distance\n");
+		R_LOG_ERROR ("Invalid distance");
 		s->distance = 0;
 	} else {
 		s->distance = (dist>0)?dist:0;
@@ -518,7 +517,7 @@ R_API int r_search_update(RSearch *s, ut64 from, const ut8 *buf, long len) {
 		}
 		ret = s->update (s, from, buf, len);
 	} else {
-		eprintf ("r_search_update: No search method defined\n");
+		R_LOG_ERROR ("Missing r_search_update callback");
 	}
 	return ret;
 }
@@ -534,7 +533,7 @@ R_API int r_search_update_read(RSearch *s, ut64 from, ut64 to) {
 	case R_SEARCH_RABIN_KARP:
 		return search_rk (s, from, to);
 	default:
-		eprintf ("Unsupported mode\n");
+		R_LOG_WARN ("Unsupported search mode");
 		return -1;
 	}
 }

man/rafind2.1

@@ -11,6 +11,7 @@
 .Op Fl F Ar file
 .Op Fl t Ar to
 .Op Fl [m|s|e] Ar str
+.Op Fl V Ar s:val
 .Op Fl x Ar hex
 .Ar file|dir
 .Sh DESCRIPTION
@@ -30,6 +31,8 @@ Only accept aligned hits
 Search for a specific string
 .It Fl S Ar str
 Search for a specific wide string
+.It Fl V Ar size:value
+Search for a little-endian value of given size. For example -V 4:123
 .It Fl e Ar regex
 Search for a regular expression string matches
 .It Fl x Ar hex