| /* strings -- print the strings of printable characters in files |
| Copyright (C) 1993, 94, 95, 96, 97, 98, 99, 2000 |
| 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" |
| |
| /* Some platforms need to put stdin into binary mode, to read |
| binary files. */ |
| #ifdef HAVE_SETMODE |
| #ifndef O_BINARY |
| #ifdef _O_BINARY |
| #define O_BINARY _O_BINARY |
| #define setmode _setmode |
| #else |
| #define O_BINARY 0 |
| #endif |
| #endif |
| #if O_BINARY |
| #include <io.h> |
| #define SET_BINARY(f) do { if (!isatty(f)) setmode(f,O_BINARY); } while (0) |
| #endif |
| #endif |
| |
| #ifdef isascii |
| #define isgraphic(c) (isascii (c) && (isprint (c) || (c) == '\t')) |
| #else |
| #define isgraphic(c) (isprint (c) || (c) == '\t') |
| #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) |
| { |
| fatal (_("invalid number %s"), optarg); |
| } |
| 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 - '0'; |
| 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; |
| #ifdef SET_BINARY |
| SET_BINARY (fileno (stdin)); |
| #endif |
| 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) |
| { |
| fatal (_("invalid integer argument %s"), s); |
| } |
| 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 %s\n"), REPORT_BUGS_TO); |
| exit (status); |
| } |