19990502 sourceware import

1999-05-03 07:29:11 +00:00
commit 252b5132c7
2316 changed files with 881473 additions and 0 deletions
--- a/binutils/strings.c
+++ b/binutils/strings.c
@@ -0,0 +1,514 @@
+/* strings -- print the strings of printable characters in files
+   Copyright (C) 1993, 94, 95, 96, 97, 98, 1999 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)
+   any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   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., 59 Temple Place - Suite 330, Boston, MA
+   02111-1307, USA.  */
+
+/* Usage: strings [options] file...
+
+   Options:
+   --all
+   -a
+   -		Do not scan only the initialized data section of object files.
+
+   --print-file-name
+   -f		Print the name of the file before each string.
+
+   --bytes=min-len
+   -n min-len
+   -min-len	Print graphic char sequences, MIN-LEN or more bytes long,
+		that are followed by a NUL or a newline.  Default is 4.
+
+   --radix={o,x,d}
+   -t {o,x,d}	Print the offset within the file before each string,
+		in octal/hex/decimal.
+
+   -o		Like -to.  (Some other implementations have -o like -to,
+		others like -td.  We chose one arbitrarily.)
+
+   --target=BFDNAME
+		Specify a non-default object file format.
+
+   --help
+   -h		Print the usage message on the standard output.
+
+   --version
+   -v		Print the program version number.
+
+   Written by Richard Stallman <rms@gnu.ai.mit.edu>
+   and David MacKenzie <djm@gnu.ai.mit.edu>.  */
+
+#include "bfd.h"
+#include <stdio.h>
+#include <getopt.h>
+#include <ctype.h>
+#include <errno.h>
+#include "bucomm.h"
+#include "libiberty.h"
+
+#ifdef isascii
+#define isgraphic(c) (isascii (c) && isprint (c))
+#else
+#define isgraphic(c) (isprint (c))
+#endif
+
+#ifndef errno
+extern int errno;
+#endif
+
+/* The BFD section flags that identify an initialized data section.  */
+#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 filename for each string.  */
+static boolean print_filenames;
+
+/* true means for object files scan only the data section.  */
+static boolean datasection_only;
+
+/* true if we found an initialized data section in the current file.  */
+static boolean got_a_section;
+
+/* The BFD object file format.  */
+static char *target;
+
+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'},
+  {"target", required_argument, NULL, 'T'},
+  {"help", no_argument, NULL, 'h'},
+  {"version", no_argument, NULL, 'v'},
+  {NULL, 0, NULL, 0}
+};
+
+static void strings_a_section PARAMS ((bfd *, asection *, PTR));
+static boolean strings_object_file PARAMS ((const char *));
+static boolean strings_file PARAMS ((char *file));
+static int integer_arg PARAMS ((char *s));
+static void print_strings PARAMS ((const char *filename, FILE *stream,
+				  file_ptr address, int stop_point,
+				  int magiccount, char *magic));
+static void usage PARAMS ((FILE *stream, int status));
+
+int
+main (argc, argv)
+     int argc;
+     char **argv;
+{
+  int optc;
+  int exit_status = 0;
+  boolean files_given = false;
+
+#if defined (HAVE_SETLOCALE) && defined (HAVE_LC_MESSAGES)
+  setlocale (LC_MESSAGES, "");
+#endif
+  bindtextdomain (PACKAGE, LOCALEDIR);
+  textdomain (PACKAGE);
+
+  program_name = argv[0];
+  xmalloc_set_program_name (program_name);
+  string_min = -1;
+  print_addresses = false;
+  print_filenames = false;
+  datasection_only = true;
+  target = NULL;
+
+  while ((optc = getopt_long (argc, argv, "afn:ot:v0123456789",
+			      long_options, (int *) 0)) != EOF)
+    {
+      switch (optc)
+	{
+	case 'a':
+	  datasection_only = false;
+	  break;
+
+	case 'f':
+	  print_filenames = true;
+	  break;
+
+	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);
+	    }
+	  break;
+
+	case 'o':
+	  print_addresses = true;
+	  address_radix = 8;
+	  break;
+
+	case 't':
+	  print_addresses = true;
+	  if (optarg[1] != '\0')
+	    usage (stderr, 1);
+	  switch (optarg[0])
+	    {
+	    case 'o':
+	      address_radix = 8;
+	      break;
+
+	    case 'd':
+	      address_radix = 10;
+	      break;
+
+	    case 'x':
+	      address_radix = 16;
+	      break;
+
+	    default:
+	      usage (stderr, 1);
+	    }
+	  break;
+
+	case 'T':
+	  target = optarg;
+	  break;
+
+	case 'v':
+	  print_version ("strings");
+	  break;
+
+	case '?':
+	  usage (stderr, 1);
+
+	default:
+	  if (string_min < 0)
+	    string_min = optc;
+	  else
+	    string_min = string_min * 10 + optc - '0';
+	  break;
+	}
+    }
+
+  if (string_min < 0)
+    string_min = 4;
+
+  bfd_init ();
+  set_default_bfd_target ();
+
+  if (optind >= argc)
+    {
+      datasection_only = false;
+      print_strings ("{standard input}", stdin, 0, 0, 0, (char *) NULL);
+      files_given = true;
+    }
+  else
+    {
+      for (; optind < argc; ++optind)
+	{
+	  if (strcmp (argv[optind], "-") == 0)
+	    datasection_only = false;
+	  else
+	    {
+	      files_given = true;
+	      exit_status |= (strings_file (argv[optind]) == false);
+	    }
+	}
+    }
+
+  if (files_given == false)
+    usage (stderr, 1);
+
+  return (exit_status);
+}
+
+/* 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.  */
+
+static void
+strings_a_section (abfd, sect, filearg)
+     bfd *abfd;
+     asection *sect;
+     PTR filearg;
+{
+  const char *file = (const char *) filearg;
+
+  if ((sect->flags & DATA_FLAGS) == DATA_FLAGS)
+    {
+      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, (FILE *) NULL, sect->filepos, 0, sz, 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)
+     const char *file;
+{
+  bfd *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) == false)
+    {
+      bfd_close (abfd);
+      return false;
+    }
+
+  got_a_section = false;
+  bfd_map_over_sections (abfd, strings_a_section, (PTR) file);
+
+  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 boolean
+strings_file (file)
+     char *file;
+{
+  /* 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, "rb");
+      /* Not all systems permit "rb", so try "r" if it failed.  */
+      if (stream == NULL)
+	stream = fopen (file, "r");
+      if (stream == NULL)
+	{
+	  fprintf (stderr, "%s: ", program_name);
+	  perror (file);
+	  return false;
+	}
+
+      print_strings (file, stream, (file_ptr) 0, 0, 0, (char *) 0);
+
+      if (fclose (stream) == EOF)
+	{
+	  fprintf (stderr, "%s: ", program_name);
+	  perror (file);
+	  return false;
+	}
+    }
+
+  return true;
+}
+
+/* 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.
+   Stop reading at address STOP_POINT in the file, if nonzero.
+
+   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)
+     const char *filename;
+     FILE *stream;
+     file_ptr address;
+     int stop_point;
+     int magiccount;
+     char *magic;
+{
+  char *buf = (char *) xmalloc (string_min + 1);
+
+  while (1)
+    {
+      file_ptr start;
+      int i;
+      int 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
+	    {
+	      if (stream == NULL)
+		return;
+	      c = getc (stream);
+	      if (c == EOF)
+		return;
+	    }
+	  address++;
+	  if (!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.  Print up
+         to the next non-graphic character.  */
+
+      if (print_filenames)
+	printf ("%s: ", filename);
+      if (print_addresses)
+	switch (address_radix)
+	  {
+	  case 8:
+	    printf ("%7lo ", (unsigned long) start);
+	    break;
+
+	  case 10:
+	    printf ("%7ld ", (long) start);
+	    break;
+
+	  case 16:
+	    printf ("%7lx ", (unsigned long) start);
+	    break;
+	  }
+
+      buf[i] = '\0';
+      fputs (buf, stdout);
+
+      while (1)
+	{
+	  if (magiccount)
+	    {
+	      magiccount--;
+	      c = *magic++;
+	    }
+	  else
+	    {
+	      if (stream == NULL)
+		break;
+	      c = getc (stream);
+	      if (c == EOF)
+		break;
+	    }
+	  address++;
+	  if (! isgraphic (c))
+	    break;
+	  putchar (c);
+	}
+
+      putchar ('\n');
+    }
+}
+
+/* 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;
+{
+  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"),
+	   program_name);
+  list_supported_targets (program_name, stream);
+  if (status == 0)
+    fprintf (stream, _("Report bugs to bug-gnu-utils@gnu.org\n"));
+  exit (status);
+}