/* strings -- print the strings of printable characters in files
- Copyright (C) 1993 Free Software Foundation, Inc.
+ Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001,
+ 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
+ Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
+ the Free Software Foundation; either version 3, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
\f
/* Usage: strings [options] file...
-o Like -to. (Some other implementations have -o like -to,
others like -td. We chose one arbitrarily.)
+ --encoding={s,S,b,l,B,L}
+ -e {s,S,b,l,B,L}
+ Select character encoding: 7-bit-character, 8-bit-character,
+ bigendian 16-bit, littleendian 16-bit, bigendian 32-bit,
+ littleendian 32-bit.
+
+ --target=BFDNAME
+ -T {bfdname}
+ Specify a non-default object file format.
+
--help
-h Print the usage message on the standard output.
--version
+ -V
-v Print the program version number.
Written by Richard Stallman <rms@gnu.ai.mit.edu>
and David MacKenzie <djm@gnu.ai.mit.edu>. */
-#include <stdio.h>
-#include <getopt.h>
-#include <ctype.h>
-#include <errno.h>
+#include "sysdep.h"
#include "bfd.h"
+#include "getopt.h"
+#include "libiberty.h"
+#include "safe-ctype.h"
+#include <sys/stat.h>
#include "bucomm.h"
-#ifdef isascii
-#define isgraphic(c) (isascii (c) && isprint (c))
-#else
-#define isgraphic(c) (isprint (c))
-#endif
+#define STRING_ISGRAPHIC(c) \
+ ( (c) >= 0 \
+ && (c) <= 255 \
+ && ((c) == '\t' || ISPRINT (c) || (encoding == 'S' && (c) > 127)))
#ifndef errno
extern int errno;
#endif
/* The BFD section flags that identify an initialized data section. */
-#define DATA_FLAGS (SEC_ALLOC | SEC_LOAD | SEC_DATA | SEC_HAS_CONTENTS)
+#define DATA_FLAGS (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS)
/* Radix for printing addresses (must be 8, 10 or 16). */
static int address_radix;
/* Minimum length of sequence of graphic chars to trigger output. */
static int string_min;
-/* true means print address within file for each string. */
-static boolean print_addresses;
+/* TRUE means print address within file for each string. */
+static bfd_boolean print_addresses;
-/* true means print filename for each string. */
-static boolean print_filenames;
+/* TRUE means print filename for each string. */
+static bfd_boolean print_filenames;
-/* true means for object files scan only the data section. */
-static boolean datasection_only;
+/* TRUE means for object files scan only the data section. */
+static bfd_boolean datasection_only;
-/* true if we found an initialized data section in the current file. */
-static boolean got_a_section;
+/* TRUE if we found an initialized data section in the current file. */
+static bfd_boolean got_a_section;
-/* Opened to /dev/null for reading from a BFD.
- This is a kludge to avoid rewriting print_strings;
- the way we call print_strings now, it actually only needs
- to read from either a memory buffer or a stream, never both
- for a given file. */
-static FILE *devnull;
+/* The BFD object file format. */
+static char *target;
-extern char *program_version;
+/* The character encoding format. */
+static char encoding;
+static int encoding_bytes;
static struct option long_options[] =
{
{"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'},
{NULL, 0, NULL, 0}
};
-static boolean strings_file PARAMS ((char *file));
-static int integer_arg PARAMS ((char *s));
-static void print_strings PARAMS ((char *filename, FILE *stream,
- file_ptr address, int stop_point,
- int magiccount, char *magic));
-static void usage PARAMS ((FILE *stream, int status));
+/* Records the size of a named file so that we
+ do not repeatedly run bfd_stat() on it. */
+
+typedef struct
+{
+ const char * filename;
+ bfd_size_type filesize;
+} filename_and_size_t;
+
+static void strings_a_section (bfd *, asection *, void *);
+static bfd_boolean strings_object_file (const char *);
+static bfd_boolean strings_file (char *file);
+static void print_strings (const char *, FILE *, file_ptr, int, int, char *);
+static void usage (FILE *, int);
+static long get_char (FILE *, file_ptr *, int *, char **);
\f
-void
-main (argc, argv)
- int argc;
- char **argv;
+int main (int, char **);
+
+int
+main (int argc, char **argv)
{
int optc;
int exit_status = 0;
- boolean files_given = false;
+ bfd_boolean files_given = FALSE;
+ char *s;
+ int numeric_opt = 0;
+
+#if defined (HAVE_SETLOCALE)
+ setlocale (LC_ALL, "");
+#endif
+ bindtextdomain (PACKAGE, LOCALEDIR);
+ textdomain (PACKAGE);
program_name = argv[0];
- string_min = -1;
- print_addresses = false;
- print_filenames = false;
- datasection_only = true;
+ xmalloc_set_program_name (program_name);
- while ((optc = getopt_long (argc, argv, "afn:ot:v0123456789",
+ expandargv (&argc, &argv);
+
+ string_min = 4;
+ print_addresses = FALSE;
+ print_filenames = FALSE;
+ datasection_only = TRUE;
+ target = NULL;
+ encoding = 's';
+
+ while ((optc = getopt_long (argc, argv, "afhHn:ot:e:T:Vv0123456789",
long_options, (int *) 0)) != EOF)
{
switch (optc)
{
case 'a':
- datasection_only = false;
+ datasection_only = FALSE;
break;
case 'f':
- print_filenames = true;
+ print_filenames = TRUE;
break;
+ case 'H':
case 'h':
usage (stdout, 0);
case 'n':
- string_min = integer_arg (optarg);
- if (string_min < 1)
- {
- fprintf (stderr, "%s: invalid number %s\n",
- program_name, optarg);
- exit (1);
- }
+ string_min = (int) strtoul (optarg, &s, 0);
+ if (s != NULL && *s != 0)
+ fatal (_("invalid integer argument %s"), optarg);
break;
case 'o':
- print_addresses = true;
+ print_addresses = TRUE;
address_radix = 8;
break;
case 't':
- print_addresses = true;
+ print_addresses = TRUE;
if (optarg[1] != '\0')
usage (stderr, 1);
switch (optarg[0])
}
break;
+ case 'T':
+ target = optarg;
+ break;
+
+ case 'e':
+ if (optarg[1] != '\0')
+ usage (stderr, 1);
+ encoding = optarg[0];
+ break;
+
+ case 'V':
case 'v':
- printf ("GNU %s version %s\n", program_name, program_version);
- exit (0);
+ print_version ("strings");
+ break;
case '?':
usage (stderr, 1);
default:
- if (string_min < 0)
- string_min = optc;
- else
- string_min = string_min * 10 + optc - '0';
+ numeric_opt = optind;
break;
}
}
- if (string_min < 0)
- string_min = 4;
+ if (numeric_opt != 0)
+ {
+ string_min = (int) strtoul (argv[numeric_opt - 1] + 1, &s, 0);
+ if (s != NULL && *s != 0)
+ fatal (_("invalid integer argument %s"), argv[numeric_opt - 1] + 1);
+ }
+ if (string_min < 1)
+ fatal (_("invalid minimum string length %d"), string_min);
- bfd_init ();
- devnull = fopen ("/dev/null", "r");
- if (devnull == NULL)
+ switch (encoding)
{
- fprintf (stderr, "%s: ", program_name);
- perror ("/dev/null");
- exit (1);
+ case 'S':
+ 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);
}
- for (; optind < argc; ++optind)
+ bfd_init ();
+ set_default_bfd_target ();
+
+ if (optind >= argc)
{
- if (!strcmp (argv[optind], "-"))
- datasection_only = false;
- else
+ datasection_only = FALSE;
+ SET_BINARY (fileno (stdin));
+ print_strings ("{standard input}", stdin, 0, 0, 0, (char *) NULL);
+ files_given = TRUE;
+ }
+ else
+ {
+ for (; optind < argc; ++optind)
{
- files_given = true;
- exit_status |= (strings_file (argv[optind]) == false);
+ if (strcmp (argv[optind], "-") == 0)
+ datasection_only = FALSE;
+ else
+ {
+ files_given = TRUE;
+ exit_status |= strings_file (argv[optind]) == FALSE;
+ }
}
}
- if (files_given == false)
+ if (!files_given)
usage (stderr, 1);
- exit (exit_status);
+ return (exit_status);
}
\f
-/* Scan section SECT of the file ABFD, whose printable name is FILE.
- If it contains initialized data,
- set `got_a_section' and print the strings in it. */
+/* Scan section SECT of the file ABFD, whose printable name is in
+ ARG->filename and whose size might be in ARG->filesize. If it
+ contains initialized data set `got_a_section' and print the
+ strings in it.
+
+ FIXME: We ought to be able to return error codes/messages for
+ certain conditions. */
static void
-strings_a_section (abfd, sect, file)
- bfd *abfd;
- asection *sect;
- PTR file;
+strings_a_section (bfd *abfd, asection *sect, void *arg)
{
- if ((sect->flags & DATA_FLAGS) == DATA_FLAGS)
+ filename_and_size_t * filename_and_sizep;
+ bfd_size_type *filesizep;
+ bfd_size_type sectsize;
+ void *mem;
+
+ if ((sect->flags & DATA_FLAGS) != DATA_FLAGS)
+ return;
+
+ sectsize = bfd_get_section_size (sect);
+
+ if (sectsize <= 0)
+ return;
+
+ /* Get the size of the file. This might have been cached for us. */
+ filename_and_sizep = (filename_and_size_t *) arg;
+ filesizep = & filename_and_sizep->filesize;
+
+ if (*filesizep == 0)
{
- bfd_size_type sz = bfd_get_section_size_before_reloc (sect);
- PTR mem = xmalloc (sz);
- if (bfd_get_section_contents (abfd, sect, mem, (file_ptr) 0, sz))
- {
- got_a_section = true;
- print_strings (file, devnull, sect->filepos, 0, sz, mem);
- }
- free (mem);
+ struct stat st;
+
+ if (bfd_stat (abfd, &st))
+ return;
+
+ /* Cache the result so that we do not repeatedly stat this file. */
+ *filesizep = st.st_size;
+ }
+
+ /* Compare the size of the section against the size of the file.
+ If the section is bigger then the file must be corrupt and
+ we should not try dumping it. */
+ if (sectsize >= *filesizep)
+ return;
+
+ mem = xmalloc (sectsize);
+
+ if (bfd_get_section_contents (abfd, sect, mem, (file_ptr) 0, sectsize))
+ {
+ got_a_section = TRUE;
+
+ print_strings (filename_and_sizep->filename, NULL, sect->filepos,
+ 0, sectsize, (char *) mem);
}
+
+ free (mem);
}
/* Scan all of the sections in FILE, and print the strings
in the initialized data section(s).
- Return true if successful,
- false if not (such as if FILE is not an object file). */
-static boolean
-strings_object_file (file)
- char *file;
+ Return TRUE if successful,
+ FALSE if not (such as if FILE is not an object file). */
+
+static bfd_boolean
+strings_object_file (const char *file)
{
- bfd *abfd = bfd_openr (file, NULL);
+ filename_and_size_t filename_and_size;
+ bfd *abfd;
+
+ abfd = bfd_openr (file, target);
if (abfd == NULL)
+ /* Treat the file as a non-object file. */
+ 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))
{
- if (bfd_error != system_call_error)
- {
- /* Out of memory, or an invalid target is specified by the
- GNUTARGET environment variable. */
- fprintf (stderr, "%s: ", program_name);
- bfd_perror (file);
- }
- return false;
+ bfd_close (abfd);
+ return FALSE;
}
- /* For some reason, without this call, the BFD has no sections.
- This call is only for the side effect of reading in the sections. */
- bfd_check_format (abfd, bfd_object);
-
- got_a_section = false;
- bfd_map_over_sections (abfd, strings_a_section, file);
+ got_a_section = FALSE;
+ filename_and_size.filename = file;
+ filename_and_size.filesize = 0;
+ bfd_map_over_sections (abfd, strings_a_section, & filename_and_size);
if (!bfd_close (abfd))
{
- fprintf (stderr, "%s: ", program_name);
- bfd_perror (file);
- return false;
+ bfd_nonfatal (file);
+ return FALSE;
}
return got_a_section;
}
-/* Print the strings in FILE. Return true if ok, false if an error occurs. */
+/* Print the strings in FILE. Return TRUE if ok, FALSE if an error occurs. */
-static boolean
-strings_file (file)
- char *file;
+static bfd_boolean
+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;
+ }
+
/* 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
{
FILE *stream;
- stream = fopen (file, "r");
+ stream = fopen (file, FOPEN_RB);
if (stream == NULL)
{
fprintf (stderr, "%s: ", program_name);
perror (file);
- return false;
+ return FALSE;
}
print_strings (file, stream, (file_ptr) 0, 0, 0, (char *) 0);
{
fprintf (stderr, "%s: ", program_name);
perror (file);
- return false;
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+\f
+/* 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 = EOF;
+ unsigned char buf[4];
+
+ 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)++;
+ buf[i] = c;
+ }
+
+ switch (encoding)
+ {
+ case 'S':
+ 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;
}
- return true;
+ if (r == EOF)
+ return 0;
+
+ return r;
}
\f
/* Find the strings in file FILENAME, read from STREAM.
is at address ADDRESS in the file.
Stop reading at address STOP_POINT in the file, if nonzero.
- Optionally the caller can supply a buffer of characters
+ 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 (filename, stream, address, stop_point, magiccount, magic)
- char *filename;
- FILE *stream;
- file_ptr address;
- int stop_point;
- int magiccount;
- char *magic;
+print_strings (const char *filename, FILE *stream, file_ptr address,
+ int stop_point, int magiccount, char *magic)
{
- int bufsize = 100;
- char *buf = (char *) xmalloc (bufsize);
+ 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:
if (stop_point && address >= stop_point)
break;
+ start = address;
for (i = 0; i < string_min; i++)
{
- if (magiccount)
- {
- magiccount--;
- c = *magic++;
- }
- else
- {
- c = getc (stream);
- if (c < 0)
- return;
- }
- address++;
- if (!isgraphic (c))
+ c = get_char (stream, &address, &magiccount, &magic);
+ if (c == EOF)
+ return;
+ if (! STRING_ISGRAPHIC (c))
/* Found a non-graphic. Try again starting with next char. */
goto tryline;
buf[i] = c;
}
- /* We found a run of `string_min' graphic characters.
- Now see if it is terminated with a NUL byte or a newline. */
- while (1)
- {
- if (i == bufsize)
- {
- bufsize *= 2;
- buf = (char *) xrealloc (buf, bufsize);
- }
- if (magiccount)
- {
- magiccount--;
- c = *magic++;
- }
- else
- {
- c = getc (stream);
- if (c < 0)
- return;
- }
- address++;
- if (c == '\0' || c == '\n')
- break; /* It is; print this string. */
- if (!isgraphic (c))
- goto tryline; /* It isn't; give up on this string. */
- buf[i++] = c; /* The string continues; store it all. */
- }
+ /* We found a run of `string_min' graphic characters. Print up
+ to the next non-graphic character. */
- /* If we get here, the string is all graphics and properly terminated,
- so print it. It is all in `buf' and `i' is its length. */
- buf[i] = '\0';
if (print_filenames)
printf ("%s: ", filename);
if (print_addresses)
switch (address_radix)
{
case 8:
- printf ("%7lo ", address - i - 1);
+#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2)
+ if (sizeof (start) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7llo ", (unsigned long long) start);
+#else
+ printf ("%7I64o ", (unsigned long long) start);
+#endif
+ }
+ else
+#elif !BFD_HOST_64BIT_LONG
+ if (start != (unsigned long) start)
+ printf ("++%7lo ", (unsigned long) start);
+ else
+#endif
+ printf ("%7lo ", (unsigned long) start);
break;
case 10:
- printf ("%7ld ", address - i - 1);
+#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2)
+ if (sizeof (start) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7lld ", (unsigned long long) start);
+#else
+ printf ("%7I64d ", (unsigned long long) start);
+#endif
+ }
+ else
+#elif !BFD_HOST_64BIT_LONG
+ if (start != (unsigned long) start)
+ printf ("++%7ld ", (unsigned long) start);
+ else
+#endif
+ printf ("%7ld ", (long) start);
break;
case 16:
- printf ("%7lx ", address - i - 1);
+#if __STDC_VERSION__ >= 199901L || (defined(__GNUC__) && __GNUC__ >= 2)
+ if (sizeof (start) > sizeof (long))
+ {
+#ifndef __MSVCRT__
+ printf ("%7llx ", (unsigned long long) start);
+#else
+ printf ("%7I64x ", (unsigned long long) start);
+#endif
+ }
+ else
+#elif !BFD_HOST_64BIT_LONG
+ if (start != (unsigned long) start)
+ printf ("%lx%8.8lx ", (unsigned long) (start >> 32),
+ (unsigned long) (start & 0xffffffff));
+ else
+#endif
+ printf ("%7lx ", (unsigned long) start);
break;
}
- for (i = 0; (c = buf[i]) != '\0'; i++)
- switch (c)
- {
- case '\n':
- printf ("\\n");
- break;
- case '\t':
- printf ("\\t");
- break;
- case '\f':
- printf ("\\f");
- break;
- case '\b':
- printf ("\\b");
+ buf[i] = '\0';
+ fputs (buf, stdout);
+
+ while (1)
+ {
+ c = get_char (stream, &address, &magiccount, &magic);
+ if (c == EOF)
break;
- case '\r':
- printf ("\\r");
+ if (! STRING_ISGRAPHIC (c))
break;
- default:
- putchar (c);
- }
+ putchar (c);
+ }
+
putchar ('\n');
}
}
\f
-/* Parse string S as an integer, using decimal radix by default,
- but allowing octal and hex numbers as in C. */
-
-static int
-integer_arg (s)
- char *s;
-{
- int value;
- int radix = 10;
- char *p = s;
- int c;
-
- if (*p != '0')
- radix = 10;
- else if (*++p == 'x')
- {
- radix = 16;
- p++;
- }
- else
- radix = 8;
-
- value = 0;
- while (((c = *p++) >= '0' && c <= '9')
- || (radix == 16 && (c & ~40) >= 'A' && (c & ~40) <= 'Z'))
- {
- value *= radix;
- if (c >= '0' && c <= '9')
- value += c - '0';
- else
- value += (c & ~40) - 'A';
- }
-
- if (c == 'b')
- value *= 512;
- else if (c == 'B')
- value *= 1024;
- else
- p--;
-
- if (*p)
- {
- fprintf (stderr, "%s: invalid integer argument %s\n", program_name, s);
- exit (1);
- }
- return value;
-}
-
static void
-usage (stream, status)
- FILE *stream;
- int status;
+usage (FILE *stream, 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\
- [--help] [--version] file...\n",
- program_name);
+ 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\
+ -a - --all Scan the entire file, not just the data section\n\
+ -f --print-file-name Print the name of the file before each string\n\
+ -n --bytes=[number] Locate & print any NUL-terminated sequence of at\n\
+ -<number> least [number] characters (default 4).\n\
+ -t --radix={o,d,x} Print the location of the string in base 8, 10 or 16\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\
+ @<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);
}
projects / external / binutils.git / blobdiff