mirror of
https://sourceware.org/git/binutils-gdb.git
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fd67aa1129
Adds two new external authors to etc/update-copyright.py to cover bfd/ax_tls.m4, and adds gprofng to dirs handled automatically, then updates copyright messages as follows: 1) Update cgen/utils.scm emitted copyrights. 2) Run "etc/update-copyright.py --this-year" with an extra external author I haven't committed, 'Kalray SA.', to cover gas testsuite files (which should have their copyright message removed). 3) Build with --enable-maintainer-mode --enable-cgen-maint=yes. 4) Check out */po/*.pot which we don't update frequently.
1364 lines
32 KiB
C
1364 lines
32 KiB
C
/* strings -- print the strings of printable characters in files
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Copyright (C) 1993-2024 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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/* Usage: strings [options] file...
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Options:
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--all
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-a
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- Scan each file in its entirety.
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--data
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-d Scan only the initialized data section(s) of object files.
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--print-file-name
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-f Print the name of the file before each string.
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--bytes=min-len
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-n min-len
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-min-len Print graphic char sequences, MIN-LEN or more bytes long,
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that are followed by a NUL or a non-displayable character.
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Default is 4.
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--radix={o,x,d}
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-t {o,x,d} Print the offset within the file before each string,
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in octal/hex/decimal.
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--include-all-whitespace
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-w By default tab and space are the only whitepace included in graphic
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char sequences. This option considers all of isspace() valid.
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-o Like -to. (Some other implementations have -o like -to,
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others like -td. We chose one arbitrarily.)
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--encoding={s,S,b,l,B,L}
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-e {s,S,b,l,B,L}
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Select character encoding: 7-bit-character, 8-bit-character,
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bigendian 16-bit, littleendian 16-bit, bigendian 32-bit,
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littleendian 32-bit.
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--target=BFDNAME
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-T {bfdname}
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Specify a non-default object file format.
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--unicode={default|locale|invalid|hex|escape|highlight}
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-U {d|l|i|x|e|h}
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Determine how to handle UTF-8 unicode characters. The default
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is no special treatment. All other versions of this option
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only apply if the encoding is valid and enabling the option
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implies --encoding=S.
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The 'locale' option displays the characters according to the
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current locale. The 'invalid' option treats them as
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non-string characters. The 'hex' option displays them as hex
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byte sequences. The 'escape' option displays them as escape
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sequences and the 'highlight' option displays them as
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coloured escape sequences.
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--output-separator=sep_string
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-s sep_string String used to separate parsed strings in output.
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Default is newline.
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--help
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-h Print the usage message on the standard output.
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--version
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-V
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-v Print the program version number.
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Written by Richard Stallman <rms@gnu.ai.mit.edu>
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and David MacKenzie <djm@gnu.ai.mit.edu>. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "getopt.h"
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#include "libiberty.h"
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#include "safe-ctype.h"
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#include "bucomm.h"
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#ifndef streq
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#define streq(a,b) (strcmp ((a),(b)) == 0)
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#endif
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typedef enum unicode_display_type
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{
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unicode_default = 0,
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unicode_locale,
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unicode_escape,
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unicode_hex,
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unicode_highlight,
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unicode_invalid
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} unicode_display_type;
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static unicode_display_type unicode_display = unicode_default;
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#define STRING_ISGRAPHIC(c) \
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( (c) >= 0 \
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&& (c) <= 255 \
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&& ((c) == '\t' || ISPRINT (c) || (encoding == 'S' && (c) > 127) \
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|| (include_all_whitespace && ISSPACE (c))) \
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)
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#ifndef errno
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extern int errno;
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#endif
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/* The BFD section flags that identify an initialized data section. */
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#define DATA_FLAGS (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS)
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/* Radix for printing addresses (must be 8, 10 or 16). */
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static int address_radix;
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/* Minimum length of sequence of graphic chars to trigger output. */
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static unsigned int string_min;
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/* Whether or not we include all whitespace as a graphic char. */
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static bool include_all_whitespace;
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/* TRUE means print address within file for each string. */
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static bool print_addresses;
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/* TRUE means print filename for each string. */
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static bool print_filenames;
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/* TRUE means for object files scan only the data section. */
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static bool datasection_only;
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/* The BFD object file format. */
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static char *target;
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/* The character encoding format. */
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static char encoding;
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static int encoding_bytes;
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/* Output string used to separate parsed strings */
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static char *output_separator;
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static struct option long_options[] =
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{
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{"all", no_argument, NULL, 'a'},
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{"bytes", required_argument, NULL, 'n'},
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{"data", no_argument, NULL, 'd'},
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{"encoding", required_argument, NULL, 'e'},
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{"help", no_argument, NULL, 'h'},
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{"include-all-whitespace", no_argument, NULL, 'w'},
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{"output-separator", required_argument, NULL, 's'},
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{"print-file-name", no_argument, NULL, 'f'},
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{"radix", required_argument, NULL, 't'},
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{"target", required_argument, NULL, 'T'},
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{"unicode", required_argument, NULL, 'U'},
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{"version", no_argument, NULL, 'v'},
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{NULL, 0, NULL, 0}
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};
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static bool strings_file (char *);
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static void print_strings (const char *, FILE *, file_ptr, int, char *);
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static void usage (FILE *, int) ATTRIBUTE_NORETURN;
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int main (int, char **);
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static void
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set_string_min (const char * arg)
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{
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char *s;
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unsigned long l = strtoul (arg, &s, 0);
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if (s != NULL && *s != 0)
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fatal (_("invalid integer argument %s"), arg);
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string_min = (unsigned int) l;
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if (l != (unsigned long) string_min)
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fatal (_("minimum string length is too big: %s"), arg);
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if (string_min < 1)
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fatal (_("minimum string length is too small: %s"), arg);
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/* PR 30595: Look for minimum string lengths that overflow an 'int'. */
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if (string_min + 1 == 0)
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fatal (_("minimum string length %s is too big"), arg);
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/* FIXME: Should we warn for unreasonably large minimum
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string lengths, even if technically they will work ? */
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}
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int
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main (int argc, char **argv)
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{
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int optc;
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int exit_status = 0;
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bool files_given = false;
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int numeric_opt = 0;
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setlocale (LC_ALL, "");
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bindtextdomain (PACKAGE, LOCALEDIR);
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textdomain (PACKAGE);
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program_name = argv[0];
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xmalloc_set_program_name (program_name);
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bfd_set_error_program_name (program_name);
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expandargv (&argc, &argv);
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string_min = 4;
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include_all_whitespace = false;
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print_addresses = false;
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print_filenames = false;
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if (DEFAULT_STRINGS_ALL)
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datasection_only = false;
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else
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datasection_only = true;
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target = NULL;
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encoding = 's';
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output_separator = NULL;
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while ((optc = getopt_long (argc, argv, "adfhHn:wot:e:T:s:U:Vv0123456789",
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long_options, (int *) 0)) != EOF)
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{
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switch (optc)
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{
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case 'a':
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datasection_only = false;
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break;
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case 'd':
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datasection_only = true;
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break;
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case 'f':
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print_filenames = true;
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break;
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case 'H':
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case 'h':
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usage (stdout, 0);
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case 'n':
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set_string_min (optarg);
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break;
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case 'w':
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include_all_whitespace = true;
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break;
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case 'o':
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print_addresses = true;
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address_radix = 8;
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break;
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case 't':
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print_addresses = true;
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if (optarg[1] != '\0')
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usage (stderr, 1);
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switch (optarg[0])
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{
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case 'o':
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address_radix = 8;
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break;
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case 'd':
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address_radix = 10;
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break;
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case 'x':
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address_radix = 16;
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break;
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default:
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usage (stderr, 1);
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}
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break;
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case 'T':
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target = optarg;
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break;
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case 'e':
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if (optarg[1] != '\0')
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usage (stderr, 1);
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encoding = optarg[0];
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break;
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case 's':
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output_separator = optarg;
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break;
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case 'U':
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if (streq (optarg, "default") || streq (optarg, "d"))
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unicode_display = unicode_default;
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else if (streq (optarg, "locale") || streq (optarg, "l"))
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unicode_display = unicode_locale;
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else if (streq (optarg, "escape") || streq (optarg, "e"))
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unicode_display = unicode_escape;
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else if (streq (optarg, "invalid") || streq (optarg, "i"))
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unicode_display = unicode_invalid;
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else if (streq (optarg, "hex") || streq (optarg, "x"))
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unicode_display = unicode_hex;
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else if (streq (optarg, "highlight") || streq (optarg, "h"))
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unicode_display = unicode_highlight;
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else
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fatal (_("invalid argument to -U/--unicode: %s"), optarg);
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break;
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case 'V':
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case 'v':
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print_version ("strings");
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break;
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case '?':
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usage (stderr, 1);
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default:
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numeric_opt = optind;
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break;
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}
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}
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if (unicode_display != unicode_default)
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encoding = 'S';
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if (numeric_opt != 0)
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set_string_min (argv[numeric_opt - 1] + 1);
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switch (encoding)
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{
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case 'S':
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case 's':
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encoding_bytes = 1;
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break;
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case 'b':
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case 'l':
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encoding_bytes = 2;
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break;
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case 'B':
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case 'L':
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encoding_bytes = 4;
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break;
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default:
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usage (stderr, 1);
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}
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if (bfd_init () != BFD_INIT_MAGIC)
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fatal (_("fatal error: libbfd ABI mismatch"));
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set_default_bfd_target ();
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if (optind >= argc)
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{
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datasection_only = false;
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SET_BINARY (fileno (stdin));
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print_strings ("{standard input}", stdin, 0, 0, (char *) NULL);
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files_given = true;
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}
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else
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{
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for (; optind < argc; ++optind)
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{
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if (streq (argv[optind], "-"))
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datasection_only = false;
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else
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{
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files_given = true;
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exit_status |= !strings_file (argv[optind]);
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}
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}
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}
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if (!files_given)
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usage (stderr, 1);
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return (exit_status);
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}
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/* Scan section SECT of the file ABFD, whose printable name is
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FILENAME. If it contains initialized data set GOT_A_SECTION and
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print the strings in it. */
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static void
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strings_a_section (bfd *abfd, asection *sect, const char *filename,
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bool *got_a_section)
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{
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bfd_size_type sectsize;
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bfd_byte *mem;
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|
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if ((sect->flags & DATA_FLAGS) != DATA_FLAGS)
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return;
|
||
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sectsize = bfd_section_size (sect);
|
||
if (sectsize == 0)
|
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return;
|
||
|
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if (!bfd_malloc_and_get_section (abfd, sect, &mem))
|
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{
|
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non_fatal (_("%s: Reading section %s failed: %s"),
|
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filename, sect->name, bfd_errmsg (bfd_get_error ()));
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return;
|
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}
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||
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*got_a_section = true;
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print_strings (filename, NULL, sect->filepos, sectsize, (char *) mem);
|
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free (mem);
|
||
}
|
||
|
||
/* Scan all of the sections in FILE, and print the strings
|
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in the initialized data section(s).
|
||
|
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Return TRUE if successful,
|
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FALSE if not (such as if FILE is not an object file). */
|
||
|
||
static bool
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||
strings_object_file (const char *file)
|
||
{
|
||
bfd *abfd;
|
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asection *s;
|
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bool got_a_section;
|
||
|
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abfd = bfd_openr (file, target);
|
||
|
||
if (abfd == NULL)
|
||
/* Treat the file as a non-object file. */
|
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return false;
|
||
|
||
/* This call is mainly for its side effect of reading in the sections.
|
||
We follow the traditional behavior of `strings' in that we don't
|
||
complain if we don't recognize a file to be an object file. */
|
||
if (!bfd_check_format (abfd, bfd_object))
|
||
{
|
||
bfd_close (abfd);
|
||
return false;
|
||
}
|
||
|
||
got_a_section = false;
|
||
for (s = abfd->sections; s != NULL; s = s->next)
|
||
strings_a_section (abfd, s, file, &got_a_section);
|
||
|
||
if (!bfd_close (abfd))
|
||
{
|
||
bfd_nonfatal (file);
|
||
return false;
|
||
}
|
||
|
||
return got_a_section;
|
||
}
|
||
|
||
/* Print the strings in FILE. Return TRUE if ok, FALSE if an error occurs. */
|
||
|
||
static bool
|
||
strings_file (char *file)
|
||
{
|
||
struct stat st;
|
||
|
||
/* get_file_size does not support non-S_ISREG files. */
|
||
|
||
if (stat (file, &st) < 0)
|
||
{
|
||
if (errno == ENOENT)
|
||
non_fatal (_("'%s': No such file"), file);
|
||
else
|
||
non_fatal (_("Warning: could not locate '%s'. reason: %s"),
|
||
file, strerror (errno));
|
||
return false;
|
||
}
|
||
else if (S_ISDIR (st.st_mode))
|
||
{
|
||
non_fatal (_("Warning: '%s' is a directory"), file);
|
||
return false;
|
||
}
|
||
|
||
/* If we weren't told to scan the whole file,
|
||
try to open it as an object file and only look at
|
||
initialized data sections. If that fails, fall back to the
|
||
whole file. */
|
||
if (!datasection_only || !strings_object_file (file))
|
||
{
|
||
FILE *stream;
|
||
|
||
stream = fopen (file, FOPEN_RB);
|
||
if (stream == NULL)
|
||
{
|
||
fprintf (stderr, "%s: ", program_name);
|
||
perror (file);
|
||
return false;
|
||
}
|
||
|
||
print_strings (file, stream, (file_ptr) 0, 0, (char *) NULL);
|
||
|
||
if (fclose (stream) == EOF)
|
||
{
|
||
fprintf (stderr, "%s: ", program_name);
|
||
perror (file);
|
||
return false;
|
||
}
|
||
}
|
||
|
||
return true;
|
||
}
|
||
|
||
/* Read the next character, return EOF if none available.
|
||
Assume that STREAM is positioned so that the next byte read
|
||
is at address ADDRESS in the file.
|
||
|
||
If STREAM is NULL, do not read from it.
|
||
The caller can supply a buffer of characters
|
||
to be processed before the data in STREAM.
|
||
MAGIC is the address of the buffer and
|
||
MAGICCOUNT is how many characters are in it. */
|
||
|
||
static long
|
||
get_char (FILE *stream, file_ptr *address, int *magiccount, char **magic)
|
||
{
|
||
int c, i;
|
||
long r = 0;
|
||
|
||
for (i = 0; i < encoding_bytes; i++)
|
||
{
|
||
if (*magiccount)
|
||
{
|
||
(*magiccount)--;
|
||
c = *(*magic)++;
|
||
}
|
||
else
|
||
{
|
||
if (stream == NULL)
|
||
return EOF;
|
||
|
||
/* Only use getc_unlocked if we found a declaration for it.
|
||
Otherwise, libc is not thread safe by default, and we
|
||
should not use it. */
|
||
|
||
#if defined(HAVE_GETC_UNLOCKED) && HAVE_DECL_GETC_UNLOCKED
|
||
c = getc_unlocked (stream);
|
||
#else
|
||
c = getc (stream);
|
||
#endif
|
||
if (c == EOF)
|
||
return EOF;
|
||
}
|
||
|
||
(*address)++;
|
||
r = (r << 8) | (c & 0xff);
|
||
}
|
||
|
||
switch (encoding)
|
||
{
|
||
default:
|
||
break;
|
||
case 'l':
|
||
r = ((r & 0xff) << 8) | ((r & 0xff00) >> 8);
|
||
break;
|
||
case 'L':
|
||
r = (((r & 0xff) << 24) | ((r & 0xff00) << 8)
|
||
| ((r & 0xff0000) >> 8) | ((r & 0xff000000) >> 24));
|
||
break;
|
||
}
|
||
|
||
return r;
|
||
}
|
||
|
||
/* Throw away one byte of a (possibly) multi-byte char C, updating
|
||
address and buffer to suit. */
|
||
|
||
static void
|
||
unget_part_char (long c, file_ptr *address, int *magiccount, char **magic)
|
||
{
|
||
static char tmp[4];
|
||
|
||
if (encoding_bytes > 1)
|
||
{
|
||
*address -= encoding_bytes - 1;
|
||
|
||
if (*magiccount == 0)
|
||
{
|
||
/* If no magic buffer exists, use temp buffer. */
|
||
switch (encoding)
|
||
{
|
||
default:
|
||
break;
|
||
case 'b':
|
||
tmp[0] = c & 0xff;
|
||
*magiccount = 1;
|
||
break;
|
||
case 'l':
|
||
tmp[0] = (c >> 8) & 0xff;
|
||
*magiccount = 1;
|
||
break;
|
||
case 'B':
|
||
tmp[0] = (c >> 16) & 0xff;
|
||
tmp[1] = (c >> 8) & 0xff;
|
||
tmp[2] = c & 0xff;
|
||
*magiccount = 3;
|
||
break;
|
||
case 'L':
|
||
tmp[0] = (c >> 8) & 0xff;
|
||
tmp[1] = (c >> 16) & 0xff;
|
||
tmp[2] = (c >> 24) & 0xff;
|
||
*magiccount = 3;
|
||
break;
|
||
}
|
||
*magic = tmp;
|
||
}
|
||
else
|
||
{
|
||
/* If magic buffer exists, rewind. */
|
||
*magic -= encoding_bytes - 1;
|
||
*magiccount += encoding_bytes - 1;
|
||
}
|
||
}
|
||
}
|
||
|
||
static void
|
||
print_filename_and_address (const char * filename, file_ptr address)
|
||
{
|
||
if (print_filenames)
|
||
printf ("%s: ", filename);
|
||
|
||
if (! print_addresses)
|
||
return;
|
||
|
||
switch (address_radix)
|
||
{
|
||
case 8:
|
||
if (sizeof (address) > sizeof (long))
|
||
{
|
||
#ifndef __MSVCRT__
|
||
printf ("%7llo ", (unsigned long long) address);
|
||
#else
|
||
printf ("%7I64o ", (unsigned long long) address);
|
||
#endif
|
||
}
|
||
else
|
||
printf ("%7lo ", (unsigned long) address);
|
||
break;
|
||
|
||
case 10:
|
||
if (sizeof (address) > sizeof (long))
|
||
{
|
||
#ifndef __MSVCRT__
|
||
printf ("%7llu ", (unsigned long long) address);
|
||
#else
|
||
printf ("%7I64d ", (unsigned long long) address);
|
||
#endif
|
||
}
|
||
else
|
||
printf ("%7ld ", (long) address);
|
||
break;
|
||
|
||
case 16:
|
||
if (sizeof (address) > sizeof (long))
|
||
{
|
||
#ifndef __MSVCRT__
|
||
printf ("%7llx ", (unsigned long long) address);
|
||
#else
|
||
printf ("%7I64x ", (unsigned long long) address);
|
||
#endif
|
||
}
|
||
else
|
||
printf ("%7lx ", (unsigned long) address);
|
||
break;
|
||
}
|
||
}
|
||
|
||
/* Return non-zero if the bytes starting at BUFFER form a valid UTF-8 encoding.
|
||
If the encoding is valid then returns the number of bytes it uses. */
|
||
|
||
static unsigned int
|
||
is_valid_utf8 (const unsigned char * buffer, unsigned long buflen)
|
||
{
|
||
if (buffer[0] < 0xc0)
|
||
return 0;
|
||
|
||
if (buflen < 2)
|
||
return 0;
|
||
|
||
if ((buffer[1] & 0xc0) != 0x80)
|
||
return 0;
|
||
|
||
if ((buffer[0] & 0x20) == 0)
|
||
return 2;
|
||
|
||
if (buflen < 3)
|
||
return 0;
|
||
|
||
if ((buffer[2] & 0xc0) != 0x80)
|
||
return 0;
|
||
|
||
if ((buffer[0] & 0x10) == 0)
|
||
return 3;
|
||
|
||
if (buflen < 4)
|
||
return 0;
|
||
|
||
if ((buffer[3] & 0xc0) != 0x80)
|
||
return 0;
|
||
|
||
return 4;
|
||
}
|
||
|
||
/* Display a UTF-8 encoded character in BUFFER according to the setting
|
||
of unicode_display. The character is known to be valid.
|
||
Returns the number of bytes consumed. */
|
||
|
||
static unsigned int
|
||
display_utf8_char (const unsigned char * buffer)
|
||
{
|
||
unsigned int j;
|
||
unsigned int utf8_len;
|
||
|
||
switch (buffer[0] & 0x30)
|
||
{
|
||
case 0x00:
|
||
case 0x10:
|
||
utf8_len = 2;
|
||
break;
|
||
case 0x20:
|
||
utf8_len = 3;
|
||
break;
|
||
default:
|
||
utf8_len = 4;
|
||
}
|
||
|
||
switch (unicode_display)
|
||
{
|
||
default:
|
||
fprintf (stderr, "ICE: unexpected unicode display type\n");
|
||
break;
|
||
|
||
case unicode_escape:
|
||
case unicode_highlight:
|
||
if (unicode_display == unicode_highlight && isatty (1))
|
||
printf ("\x1B[31;47m"); /* Red. */
|
||
|
||
switch (utf8_len)
|
||
{
|
||
case 2:
|
||
printf ("\\u%02x%02x",
|
||
((buffer[0] & 0x1c) >> 2),
|
||
((buffer[0] & 0x03) << 6) | (buffer[1] & 0x3f));
|
||
break;
|
||
|
||
case 3:
|
||
printf ("\\u%02x%02x",
|
||
((buffer[0] & 0x0f) << 4) | ((buffer[1] & 0x3c) >> 2),
|
||
((buffer[1] & 0x03) << 6) | ((buffer[2] & 0x3f)));
|
||
break;
|
||
|
||
case 4:
|
||
printf ("\\u%02x%02x%02x",
|
||
((buffer[0] & 0x07) << 6) | ((buffer[1] & 0x3c) >> 2),
|
||
((buffer[1] & 0x03) << 6) | ((buffer[2] & 0x3c) >> 2),
|
||
((buffer[2] & 0x03) << 6) | ((buffer[3] & 0x3f)));
|
||
break;
|
||
default:
|
||
/* URG. */
|
||
break;
|
||
}
|
||
|
||
if (unicode_display == unicode_highlight && isatty (1))
|
||
printf ("\033[0m"); /* Default colour. */
|
||
break;
|
||
|
||
case unicode_hex:
|
||
putchar ('<');
|
||
printf ("0x");
|
||
for (j = 0; j < utf8_len; j++)
|
||
printf ("%02x", buffer [j]);
|
||
putchar ('>');
|
||
break;
|
||
|
||
case unicode_locale:
|
||
printf ("%.1s", buffer);
|
||
break;
|
||
}
|
||
|
||
return utf8_len;
|
||
}
|
||
|
||
/* Display strings in BUFFER. Treat any UTF-8 encoded characters encountered
|
||
according to the setting of the unicode_display variable. The buffer
|
||
contains BUFLEN bytes.
|
||
|
||
Display the characters as if they started at ADDRESS and are contained in
|
||
FILENAME. */
|
||
|
||
static void
|
||
print_unicode_buffer (const char * filename,
|
||
file_ptr address,
|
||
const unsigned char * buffer,
|
||
unsigned long buflen)
|
||
{
|
||
/* Paranoia checks... */
|
||
if (filename == NULL
|
||
|| buffer == NULL
|
||
|| unicode_display == unicode_default
|
||
|| encoding != 'S'
|
||
|| encoding_bytes != 1)
|
||
{
|
||
fprintf (stderr, "ICE: bad arguments to print_unicode_buffer\n");
|
||
return;
|
||
}
|
||
|
||
if (buflen == 0)
|
||
return;
|
||
|
||
/* We must only display strings that are at least string_min *characters*
|
||
long. So we scan the buffer in two stages. First we locate the start
|
||
of a potential string. Then we walk along it until we have found
|
||
string_min characters. Then we go back to the start point and start
|
||
displaying characters according to the unicode_display setting. */
|
||
|
||
unsigned long start_point = 0;
|
||
unsigned long i = 0;
|
||
unsigned int char_len = 1;
|
||
unsigned int num_found = 0;
|
||
|
||
for (i = 0; i < buflen; i += char_len)
|
||
{
|
||
int c = buffer[i];
|
||
|
||
char_len = 1;
|
||
|
||
/* Find the first potential character of a string. */
|
||
if (! STRING_ISGRAPHIC (c))
|
||
{
|
||
num_found = 0;
|
||
continue;
|
||
}
|
||
|
||
if (c > 126)
|
||
{
|
||
if (c < 0xc0)
|
||
{
|
||
num_found = 0;
|
||
continue;
|
||
}
|
||
|
||
if ((char_len = is_valid_utf8 (buffer + i, buflen - i)) == 0)
|
||
{
|
||
char_len = 1;
|
||
num_found = 0;
|
||
continue;
|
||
}
|
||
|
||
if (unicode_display == unicode_invalid)
|
||
{
|
||
/* We have found a valid UTF-8 character, but we treat it as non-graphic. */
|
||
num_found = 0;
|
||
continue;
|
||
}
|
||
}
|
||
|
||
if (num_found == 0)
|
||
/* We have found a potential starting point for a string. */
|
||
start_point = i;
|
||
|
||
++ num_found;
|
||
|
||
if (num_found >= string_min)
|
||
break;
|
||
}
|
||
|
||
if (num_found < string_min)
|
||
return;
|
||
|
||
print_filename_and_address (filename, address + start_point);
|
||
|
||
/* We have found string_min characters. Display them and any
|
||
more that follow. */
|
||
for (i = start_point; i < buflen; i += char_len)
|
||
{
|
||
int c = buffer[i];
|
||
|
||
char_len = 1;
|
||
|
||
if (! STRING_ISGRAPHIC (c))
|
||
break;
|
||
else if (c < 127)
|
||
putchar (c);
|
||
else if (! is_valid_utf8 (buffer + i, buflen - i))
|
||
break;
|
||
else if (unicode_display == unicode_invalid)
|
||
break;
|
||
else
|
||
char_len = display_utf8_char (buffer + i);
|
||
}
|
||
|
||
if (output_separator)
|
||
fputs (output_separator, stdout);
|
||
else
|
||
putchar ('\n');
|
||
|
||
/* FIXME: Using tail recursion here is lazy programming... */
|
||
print_unicode_buffer (filename, address + i, buffer + i, buflen - i);
|
||
}
|
||
|
||
static int
|
||
get_unicode_byte (FILE * stream,
|
||
unsigned char * putback,
|
||
unsigned int * num_putback,
|
||
unsigned int * num_read)
|
||
{
|
||
if (* num_putback > 0)
|
||
{
|
||
* num_putback = * num_putback - 1;
|
||
return putback [* num_putback];
|
||
}
|
||
|
||
* num_read = * num_read + 1;
|
||
|
||
#if defined(HAVE_GETC_UNLOCKED) && HAVE_DECL_GETC_UNLOCKED
|
||
return getc_unlocked (stream);
|
||
#else
|
||
return getc (stream);
|
||
#endif
|
||
}
|
||
|
||
/* Helper function for print_unicode_stream. */
|
||
|
||
static void
|
||
print_unicode_stream_body (const char * filename,
|
||
file_ptr address,
|
||
FILE * stream,
|
||
unsigned char * putback_buf,
|
||
unsigned int num_putback,
|
||
unsigned char * print_buf)
|
||
{
|
||
/* It would be nice if we could just read the stream into a buffer
|
||
and then process if with print_unicode_buffer. But the input
|
||
might be huge or it might time-locked (eg stdin). So instead
|
||
we go one byte at a time... */
|
||
|
||
file_ptr start_point = 0;
|
||
unsigned int num_read = 0;
|
||
unsigned int num_chars = 0;
|
||
unsigned int num_print = 0;
|
||
int c = 0;
|
||
|
||
/* Find a series of string_min characters. Put them into print_buf. */
|
||
do
|
||
{
|
||
if (num_chars >= string_min)
|
||
break;
|
||
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (! STRING_ISGRAPHIC (c))
|
||
{
|
||
num_chars = num_print = 0;
|
||
continue;
|
||
}
|
||
|
||
if (num_chars == 0)
|
||
start_point = num_read - 1;
|
||
|
||
if (c < 127)
|
||
{
|
||
print_buf[num_print] = c;
|
||
num_chars ++;
|
||
num_print ++;
|
||
continue;
|
||
}
|
||
|
||
if (c < 0xc0)
|
||
{
|
||
num_chars = num_print = 0;
|
||
continue;
|
||
}
|
||
|
||
/* We *might* have a UTF-8 sequence. Time to start peeking. */
|
||
char utf8[4];
|
||
|
||
utf8[0] = c;
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[1] = c;
|
||
|
||
if ((utf8[1] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[1];
|
||
num_chars = num_print = 0;
|
||
continue;
|
||
}
|
||
else if ((utf8[0] & 0x20) == 0)
|
||
{
|
||
/* A valid 2-byte UTF-8 encoding. */
|
||
if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[1];
|
||
num_chars = num_print = 0;
|
||
}
|
||
else
|
||
{
|
||
print_buf[num_print ++] = utf8[0];
|
||
print_buf[num_print ++] = utf8[1];
|
||
num_chars ++;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[2] = c;
|
||
|
||
if ((utf8[2] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
num_chars = num_print = 0;
|
||
continue;
|
||
}
|
||
else if ((utf8[0] & 0x10) == 0)
|
||
{
|
||
/* A valid 3-byte UTF-8 encoding. */
|
||
if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
num_chars = num_print = 0;
|
||
}
|
||
else
|
||
{
|
||
print_buf[num_print ++] = utf8[0];
|
||
print_buf[num_print ++] = utf8[1];
|
||
print_buf[num_print ++] = utf8[2];
|
||
num_chars ++;
|
||
}
|
||
continue;
|
||
}
|
||
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[3] = c;
|
||
|
||
if ((utf8[3] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[3];
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
num_chars = num_print = 0;
|
||
}
|
||
/* We have a valid 4-byte UTF-8 encoding. */
|
||
else if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[3];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
putback_buf[num_putback++] = utf8[2];
|
||
num_chars = num_print = 0;
|
||
}
|
||
else
|
||
{
|
||
print_buf[num_print ++] = utf8[0];
|
||
print_buf[num_print ++] = utf8[1];
|
||
print_buf[num_print ++] = utf8[2];
|
||
print_buf[num_print ++] = utf8[3];
|
||
num_chars ++;
|
||
}
|
||
}
|
||
while (1);
|
||
|
||
if (num_chars >= string_min)
|
||
{
|
||
/* We know that we have string_min valid characters in print_buf,
|
||
and there may be more to come in the stream. Start displaying
|
||
them. */
|
||
|
||
print_filename_and_address (filename, address + start_point);
|
||
|
||
unsigned int i;
|
||
for (i = 0; i < num_print;)
|
||
{
|
||
if (print_buf[i] < 127)
|
||
putchar (print_buf[i++]);
|
||
else
|
||
i += display_utf8_char (print_buf + i);
|
||
}
|
||
|
||
/* OK so now we have to start read unchecked bytes. */
|
||
|
||
/* Find a series of string_min characters. Put them into print_buf. */
|
||
do
|
||
{
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
|
||
if (! STRING_ISGRAPHIC (c))
|
||
break;
|
||
|
||
if (c < 127)
|
||
{
|
||
putchar (c);
|
||
continue;
|
||
}
|
||
|
||
if (c < 0xc0)
|
||
break;
|
||
|
||
/* We *might* have a UTF-8 sequence. Time to start peeking. */
|
||
unsigned char utf8[4];
|
||
|
||
utf8[0] = c;
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[1] = c;
|
||
|
||
if ((utf8[1] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else if ((utf8[0] & 0x20) == 0)
|
||
{
|
||
/* Valid 2-byte UTF-8. */
|
||
if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
(void) display_utf8_char (utf8);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[2] = c;
|
||
|
||
if ((utf8[2] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else if ((utf8[0] & 0x10) == 0)
|
||
{
|
||
/* Valid 3-byte UTF-8. */
|
||
if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else
|
||
{
|
||
(void) display_utf8_char (utf8);
|
||
continue;
|
||
}
|
||
}
|
||
|
||
c = get_unicode_byte (stream, putback_buf, & num_putback, & num_read);
|
||
if (c == EOF)
|
||
break;
|
||
utf8[3] = c;
|
||
|
||
if ((utf8[3] & 0xc0) != 0x80)
|
||
{
|
||
/* Invalid UTF-8. */
|
||
putback_buf[num_putback++] = utf8[3];
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else if (unicode_display == unicode_invalid)
|
||
{
|
||
putback_buf[num_putback++] = utf8[3];
|
||
putback_buf[num_putback++] = utf8[2];
|
||
putback_buf[num_putback++] = utf8[1];
|
||
break;
|
||
}
|
||
else
|
||
/* A valid 4-byte UTF-8 encoding. */
|
||
(void) display_utf8_char (utf8);
|
||
}
|
||
while (1);
|
||
|
||
if (output_separator)
|
||
fputs (output_separator, stdout);
|
||
else
|
||
putchar ('\n');
|
||
}
|
||
|
||
if (c != EOF)
|
||
/* FIXME: Using tail recursion here is lazy, but it works. */
|
||
print_unicode_stream_body (filename, address + num_read, stream, putback_buf, num_putback, print_buf);
|
||
}
|
||
|
||
/* Display strings read in from STREAM. Treat any UTF-8 encoded characters
|
||
encountered according to the setting of the unicode_display variable.
|
||
The stream is positioned at ADDRESS and is attached to FILENAME. */
|
||
|
||
static void
|
||
print_unicode_stream (const char * filename,
|
||
file_ptr address,
|
||
FILE * stream)
|
||
{
|
||
/* Paranoia checks... */
|
||
if (filename == NULL
|
||
|| stream == NULL
|
||
|| unicode_display == unicode_default
|
||
|| encoding != 'S'
|
||
|| encoding_bytes != 1)
|
||
{
|
||
fprintf (stderr, "ICE: bad arguments to print_unicode_stream\n");
|
||
return;
|
||
}
|
||
|
||
/* Allocate space for string_min 4-byte utf-8 characters. */
|
||
size_t amt = string_min;
|
||
amt = (4 * amt) + 1;
|
||
unsigned char * print_buf = xmalloc (amt);
|
||
/* We should never have to put back more than 4 bytes. */
|
||
unsigned char putback_buf[5];
|
||
unsigned int num_putback = 0;
|
||
|
||
print_unicode_stream_body (filename, address, stream, putback_buf, num_putback, print_buf);
|
||
free (print_buf);
|
||
}
|
||
|
||
/* Find the strings in file FILENAME, read from STREAM.
|
||
Assume that STREAM is positioned so that the next byte read
|
||
is at address ADDRESS in the file.
|
||
|
||
If STREAM is NULL, do not read from it.
|
||
The caller can supply a buffer of characters
|
||
to be processed before the data in STREAM.
|
||
MAGIC is the address of the buffer and
|
||
MAGICCOUNT is how many characters are in it.
|
||
Those characters come at address ADDRESS and the data in STREAM follow. */
|
||
|
||
static void
|
||
print_strings (const char *filename, FILE *stream, file_ptr address,
|
||
int magiccount, char *magic)
|
||
{
|
||
if (unicode_display != unicode_default)
|
||
{
|
||
if (magic != NULL)
|
||
print_unicode_buffer (filename, address,
|
||
(const unsigned char *) magic, magiccount);
|
||
|
||
if (stream != NULL)
|
||
print_unicode_stream (filename, address, stream);
|
||
return;
|
||
}
|
||
|
||
char *buf = (char *) xmalloc (sizeof (char) * (string_min + 1));
|
||
|
||
while (1)
|
||
{
|
||
file_ptr start;
|
||
unsigned int i;
|
||
long c;
|
||
|
||
/* See if the next `string_min' chars are all graphic chars. */
|
||
tryline:
|
||
start = address;
|
||
for (i = 0; i < string_min; i++)
|
||
{
|
||
c = get_char (stream, &address, &magiccount, &magic);
|
||
if (c == EOF)
|
||
{
|
||
free (buf);
|
||
return;
|
||
}
|
||
|
||
if (! STRING_ISGRAPHIC (c))
|
||
{
|
||
/* Found a non-graphic. Try again starting with next byte. */
|
||
unget_part_char (c, &address, &magiccount, &magic);
|
||
goto tryline;
|
||
}
|
||
buf[i] = c;
|
||
}
|
||
|
||
/* We found a run of `string_min' graphic characters. Print up
|
||
to the next non-graphic character. */
|
||
print_filename_and_address (filename, start);
|
||
|
||
buf[i] = '\0';
|
||
fputs (buf, stdout);
|
||
|
||
while (1)
|
||
{
|
||
c = get_char (stream, &address, &magiccount, &magic);
|
||
if (c == EOF)
|
||
break;
|
||
if (! STRING_ISGRAPHIC (c))
|
||
{
|
||
unget_part_char (c, &address, &magiccount, &magic);
|
||
break;
|
||
}
|
||
putchar (c);
|
||
}
|
||
|
||
if (output_separator)
|
||
fputs (output_separator, stdout);
|
||
else
|
||
putchar ('\n');
|
||
}
|
||
free (buf);
|
||
}
|
||
|
||
static void
|
||
usage (FILE *stream, int status)
|
||
{
|
||
fprintf (stream, _("Usage: %s [option(s)] [file(s)]\n"), program_name);
|
||
fprintf (stream, _(" Display printable strings in [file(s)] (stdin by default)\n"));
|
||
fprintf (stream, _(" The options are:\n"));
|
||
|
||
if (DEFAULT_STRINGS_ALL)
|
||
fprintf (stream, _("\
|
||
-a - --all Scan the entire file, not just the data section [default]\n\
|
||
-d --data Only scan the data sections in the file\n"));
|
||
else
|
||
fprintf (stream, _("\
|
||
-a - --all Scan the entire file, not just the data section\n\
|
||
-d --data Only scan the data sections in the file [default]\n"));
|
||
|
||
fprintf (stream, _("\
|
||
-f --print-file-name Print the name of the file before each string\n\
|
||
-n <number> Locate & print any sequence of at least <number>\n\
|
||
--bytes=<number> displayable characters. (The default is 4).\n\
|
||
-t --radix={o,d,x} Print the location of the string in base 8, 10 or 16\n\
|
||
-w --include-all-whitespace Include all whitespace as valid string characters\n\
|
||
-o An alias for --radix=o\n\
|
||
-T --target=<BFDNAME> Specify the binary file format\n\
|
||
-e --encoding={s,S,b,l,B,L} Select character size and endianness:\n\
|
||
s = 7-bit, S = 8-bit, {b,l} = 16-bit, {B,L} = 32-bit\n\
|
||
--unicode={default|show|invalid|hex|escape|highlight}\n\
|
||
-U {d|s|i|x|e|h} Specify how to treat UTF-8 encoded unicode characters\n\
|
||
-s --output-separator=<string> String used to separate strings in output.\n\
|
||
@<file> Read options from <file>\n\
|
||
-h --help Display this information\n\
|
||
-v -V --version Print the program's version number\n"));
|
||
list_supported_targets (program_name, stream);
|
||
if (REPORT_BUGS_TO[0] && status == 0)
|
||
fprintf (stream, _("Report bugs to %s\n"), REPORT_BUGS_TO);
|
||
exit (status);
|
||
}
|