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Add new command line option '--encoding' to strings

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This commit is contained in:
Nick Clifton 2001-09-14 11:32:25 +00:00
parent 2613489e4e
commit d132876a03
4 changed files with 146 additions and 40 deletions
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12
binutils/ChangeLog
View File

@ -1,3 +1,15 @@
2001-09-14 Nick Clifton <nickc@cambridge.redhat.com>
* strings.c (encoding, encoding_bytes): New variables.
(long_options): Add --encoding.
(main): Accept -e and --encoding.
(get_char): New function. Read a, possibly wide, character from
the input stream.
(print_strings): Use get_char().
(usage): Document new command line option.
* doc/binutils.texi: Document new command line option.
* NEWS: Announce new command line option.
Wed Sep 12 20:07:16 2001 Alexandre Oliva <aoliva@redhat.com>
* readelf.c (guess_is_rela, dump_relocations, get_machine_name,

2
binutils/NEWS
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@ -1,5 +1,7 @@
-*- text -*-
* strings: Add --encoding to display wide character strings. By Markus Kuhn.
* objcopy: Add --rename-section to change section names.
* readelf: Support added for DWARF 2.1 extensions. Support added for

18
binutils/doc/binutils.texi
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@ -1853,9 +1853,12 @@ ar(1), objdump(1), readelf(1), and the Info entries for @file{binutils}.
@smallexample
@c man begin SYNOPSIS strings
strings [@option{-afov}] [@option{-}@var{min-len}] [@option{-n} @var{min-len}] [@option{-t} @var{radix}] [@option{-}]
[@option{--all}] [@option{--print-file-name}] [@option{--bytes=}@var{min-len}]
[@option{--radix=}@var{radix}] [@option{--target=}@var{bfdname}]
strings [@option{-afov}] [@option{-}@var{min-len}]
[@option{-n} @var{min-len}] [@option{--bytes=}@var{min-len}]
[@option{-t} @var{radix}] [@option{--radix=}@var{radix}]
[@option{-e} @var{encoding}] [@option{--encoding=}@var{encoding}]
[@option{-}] [@option{--all}] [@option{--print-file-name}]
[@option{--target=}@var{bfdname}]
[@option{--help}] [@option{--version}] @var{file}@dots{}
@c man end
@end smallexample
@ -1907,6 +1910,15 @@ Print the offset within the file before each string. The single
character argument specifies the radix of the offset---@samp{o} for
octal, @samp{x} for hexadecimal, or @samp{d} for decimal.
@item -e @var{encoding}
@itemx --encoding=@var{encoding}
Select the character encoding of the strings that are to be found.
Possible values for @var{encoding} are: @samp{s} = single-byte
characters (ASCII, ISO 8859, etc., default), @samp{b} = 16-bit
Bigendian, @samp{l} = 16-bit Littleendian, @samp{B} = 32-bit Bigendian,
@samp{L} = 32-bit Littleendian. Useful for finding wide character
strings.
@item --target=@var{bfdname}
@cindex object code format
Specify an object code format other than your system's default format.

154
binutils/strings.c
View File

@ -1,5 +1,5 @@
/* strings -- print the strings of printable characters in files
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001
Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
@ -39,6 +39,11 @@
-o Like -to. (Some other implementations have -o like -to,
others like -td. We chose one arbitrarily.)
--encoding={s,b,l,B,L}
-e {s,b,l,B,L}
Select character encoding: single-byte, bigendian 16-bit,
littleendian 16-bit, bigendian 32-bit, littleendian 32-bit
--target=BFDNAME
Specify a non-default object file format.
@ -113,12 +118,17 @@ static boolean got_a_section;
/* The BFD object file format. */
static char *target;
/* The character encoding format. */
static char encoding;
static int encoding_bytes;
static struct option long_options[] =
{
{"all", no_argument, NULL, 'a'},
{"print-file-name", no_argument, NULL, 'f'},
{"bytes", required_argument, NULL, 'n'},
{"radix", required_argument, NULL, 't'},
{"encoding", required_argument, NULL, 'e'},
{"target", required_argument, NULL, 'T'},
{"help", no_argument, NULL, 'h'},
{"version", no_argument, NULL, 'v'},
@ -156,8 +166,9 @@ main (argc, argv)
print_filenames = false;
datasection_only = true;
target = NULL;
encoding = 's';
while ((optc = getopt_long (argc, argv, "afn:ot:v0123456789",
while ((optc = getopt_long (argc, argv, "afn:ot:e:v0123456789",
long_options, (int *) 0)) != EOF)
{
switch (optc)
@ -213,6 +224,12 @@ main (argc, argv)
target = optarg;
break;
case 'e':
if (optarg[1] != '\0')
usage (stderr, 1);
encoding = optarg[0];
break;
case 'v':
print_version ("strings");
break;
@ -232,6 +249,23 @@ main (argc, argv)
if (string_min < 0)
string_min = 4;
switch (encoding)
{
case 's':
encoding_bytes = 1;
break;
case 'b':
case 'l':
encoding_bytes = 2;
break;
case 'B':
case 'L':
encoding_bytes = 4;
break;
default:
usage (stderr, 1);
}
bfd_init ();
set_default_bfd_target ();
@ -366,6 +400,74 @@ strings_file (file)
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 (stream, address, magiccount, magic)
FILE *stream;
file_ptr *address;
int *magiccount;
char **magic;
{
int c, i;
long r;
unsigned char buf[4];
for (i = 0; i < encoding_bytes; i++)
{
if (*magiccount)
{
(*magiccount)--;
c = *(*magic)++;
}
else
{
if (stream == NULL)
return EOF;
c = getc (stream);
if (c == EOF)
return EOF;
}
(*address)++;
buf[i] = c;
}
switch (encoding)
{
case 's':
r = buf[0];
break;
case 'b':
r = (buf[0] << 8) | buf[1];
break;
case 'l':
r = buf[0] | (buf[1] << 8);
break;
case 'B':
r = ((long) buf[0] << 24) | ((long) buf[1] << 16) |
((long) buf[2] << 8) | buf[3];
break;
case 'L':
r = buf[0] | ((long) buf[1] << 8) | ((long) buf[2] << 16) |
((long) buf[3] << 24);
break;
}
if (r == EOF)
return 0;
return r;
}
/* 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.
@ -387,13 +489,13 @@ print_strings (filename, stream, address, stop_point, magiccount, magic)
int magiccount;
char *magic;
{
char *buf = (char *) xmalloc (string_min + 1);
char *buf = (char *) xmalloc (sizeof (char) * (string_min + 1));
while (1)
{
file_ptr start;
int i;
int c;
long c;
/* See if the next `string_min' chars are all graphic chars. */
tryline:
@ -402,21 +504,10 @@ print_strings (filename, stream, address, stop_point, magiccount, magic)
start = address;
for (i = 0; i < string_min; i++)
{
if (magiccount)
{
magiccount--;
c = *magic++;
}
else
{
if (stream == NULL)
return;
c = getc (stream);
if (c == EOF)
return;
}
address++;
if (!isgraphic (c))
c = get_char (stream, &address, &magiccount, &magic);
if (c == EOF)
return;
if (c > 255 || c < 0 || !isgraphic (c))
/* Found a non-graphic. Try again starting with next char. */
goto tryline;
buf[i] = c;
@ -448,21 +539,10 @@ print_strings (filename, stream, address, stop_point, magiccount, magic)
while (1)
{
if (magiccount)
{
magiccount--;
c = *magic++;
}
else
{
if (stream == NULL)
break;
c = getc (stream);
if (c == EOF)
break;
}
address++;
if (! isgraphic (c))
c = get_char (stream, &address, &magiccount, &magic);
if (c == EOF)
break;
if (c > 255 || c < 0 || !isgraphic (c))
break;
putchar (c);
}
@ -524,9 +604,9 @@ usage (stream, status)
int status;
{
fprintf (stream, _("\
Usage: %s [-afov] [-n min-len] [-min-len] [-t {o,x,d}] [-]\n\
[--all] [--print-file-name] [--bytes=min-len] [--radix={o,x,d}]\n\
[--target=bfdname] [--help] [--version] file...\n"),
Usage: %s [-afov] [-n min-len] [-min-len] [-t {o,x,d}] [-e {s,b,l,B,L}]\n\
[-] [--all] [--print-file-name] [--bytes=min-len] [--radix={o,x,d}]\n\
[--target=bfdname] [--encoding {s,b,l,B,L}] [--help] [--version] file...\n"),
program_name);
list_supported_targets (program_name, stream);
if (status == 0)