656 lines
15 KiB
C
656 lines
15 KiB
C
/* bucomm.c -- Bin Utils COMmon code.
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Copyright (C) 1991-2015 Free Software Foundation, Inc.
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This file is part of GNU Binutils.
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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 of the License, or
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(at your option) 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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/* We might put this in a library someday so it could be dynamically
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loaded, but for now it's not necessary. */
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#include "sysdep.h"
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#include "bfd.h"
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#include "libiberty.h"
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#include "filenames.h"
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#include "libbfd.h"
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#include <time.h> /* ctime, maybe time_t */
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#include <assert.h>
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#include "bucomm.h"
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#ifndef HAVE_TIME_T_IN_TIME_H
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#ifndef HAVE_TIME_T_IN_TYPES_H
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typedef long time_t;
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#endif
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#endif
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static const char * endian_string (enum bfd_endian);
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static int display_target_list (void);
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static int display_info_table (int, int);
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static int display_target_tables (void);
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/* Error reporting. */
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char *program_name;
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void
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bfd_nonfatal (const char *string)
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{
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const char *errmsg;
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errmsg = bfd_errmsg (bfd_get_error ());
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fflush (stdout);
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if (string)
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fprintf (stderr, "%s: %s: %s\n", program_name, string, errmsg);
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else
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fprintf (stderr, "%s: %s\n", program_name, errmsg);
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}
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/* Issue a non fatal error message. FILENAME, or if NULL then BFD,
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are used to indicate the problematic file. SECTION, if non NULL,
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is used to provide a section name. If FORMAT is non-null, then it
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is used to print additional information via vfprintf. Finally the
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bfd error message is printed. In summary, error messages are of
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one of the following forms:
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PROGRAM:file: bfd-error-message
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PROGRAM:file[section]: bfd-error-message
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PROGRAM:file: printf-message: bfd-error-message
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PROGRAM:file[section]: printf-message: bfd-error-message. */
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void
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bfd_nonfatal_message (const char *filename,
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const bfd *abfd,
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const asection *section,
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const char *format, ...)
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{
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const char *errmsg;
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const char *section_name;
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va_list args;
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errmsg = bfd_errmsg (bfd_get_error ());
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fflush (stdout);
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section_name = NULL;
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va_start (args, format);
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fprintf (stderr, "%s", program_name);
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if (abfd)
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{
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if (!filename)
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filename = bfd_get_archive_filename (abfd);
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if (section)
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section_name = bfd_get_section_name (abfd, section);
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}
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if (section_name)
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fprintf (stderr, ":%s[%s]", filename, section_name);
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else
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fprintf (stderr, ":%s", filename);
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if (format)
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{
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fprintf (stderr, ": ");
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vfprintf (stderr, format, args);
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}
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fprintf (stderr, ": %s\n", errmsg);
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va_end (args);
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}
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void
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bfd_fatal (const char *string)
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{
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bfd_nonfatal (string);
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xexit (1);
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}
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void
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report (const char * format, va_list args)
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{
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fflush (stdout);
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fprintf (stderr, "%s: ", program_name);
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vfprintf (stderr, format, args);
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putc ('\n', stderr);
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}
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void
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fatal (const char *format, ...)
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{
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va_list args;
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va_start (args, format);
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report (format, args);
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va_end (args);
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xexit (1);
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}
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void
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non_fatal (const char *format, ...)
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{
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va_list args;
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va_start (args, format);
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report (format, args);
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va_end (args);
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}
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/* Set the default BFD target based on the configured target. Doing
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this permits the binutils to be configured for a particular target,
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and linked against a shared BFD library which was configured for a
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different target. */
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void
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set_default_bfd_target (void)
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{
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/* The macro TARGET is defined by Makefile. */
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const char *target = TARGET;
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if (! bfd_set_default_target (target))
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fatal (_("can't set BFD default target to `%s': %s"),
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target, bfd_errmsg (bfd_get_error ()));
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}
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/* After a FALSE return from bfd_check_format_matches with
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bfd_get_error () == bfd_error_file_ambiguously_recognized, print
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the possible matching targets. */
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void
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list_matching_formats (char **p)
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{
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fflush (stdout);
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fprintf (stderr, _("%s: Matching formats:"), program_name);
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while (*p)
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fprintf (stderr, " %s", *p++);
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fputc ('\n', stderr);
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}
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/* List the supported targets. */
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void
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list_supported_targets (const char *name, FILE *f)
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{
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int t;
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const char **targ_names;
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if (name == NULL)
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fprintf (f, _("Supported targets:"));
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else
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fprintf (f, _("%s: supported targets:"), name);
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targ_names = bfd_target_list ();
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for (t = 0; targ_names[t] != NULL; t++)
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fprintf (f, " %s", targ_names[t]);
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fprintf (f, "\n");
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free (targ_names);
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}
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/* List the supported architectures. */
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void
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list_supported_architectures (const char *name, FILE *f)
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{
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const char ** arch;
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const char ** arches;
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if (name == NULL)
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fprintf (f, _("Supported architectures:"));
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else
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fprintf (f, _("%s: supported architectures:"), name);
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for (arch = arches = bfd_arch_list (); *arch; arch++)
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fprintf (f, " %s", *arch);
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fprintf (f, "\n");
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free (arches);
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}
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/* The length of the longest architecture name + 1. */
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#define LONGEST_ARCH sizeof ("powerpc:common")
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static const char *
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endian_string (enum bfd_endian endian)
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{
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switch (endian)
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{
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case BFD_ENDIAN_BIG: return _("big endian");
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case BFD_ENDIAN_LITTLE: return _("little endian");
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default: return _("endianness unknown");
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}
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}
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/* List the targets that BFD is configured to support, each followed
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by its endianness and the architectures it supports. */
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static int
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display_target_list (void)
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{
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char *dummy_name;
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int t;
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int ret = 1;
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dummy_name = make_temp_file (NULL);
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for (t = 0; bfd_target_vector[t]; t++)
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{
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const bfd_target *p = bfd_target_vector[t];
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bfd *abfd = bfd_openw (dummy_name, p->name);
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int a;
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printf (_("%s\n (header %s, data %s)\n"), p->name,
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endian_string (p->header_byteorder),
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endian_string (p->byteorder));
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if (abfd == NULL)
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{
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bfd_nonfatal (dummy_name);
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ret = 0;
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continue;
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}
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if (! bfd_set_format (abfd, bfd_object))
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{
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if (bfd_get_error () != bfd_error_invalid_operation)
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{
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bfd_nonfatal (p->name);
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ret = 0;
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}
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bfd_close_all_done (abfd);
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continue;
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}
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for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
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if (bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
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printf (" %s\n",
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bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
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bfd_close_all_done (abfd);
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}
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unlink (dummy_name);
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free (dummy_name);
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return ret;
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}
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/* Print a table showing which architectures are supported for entries
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FIRST through LAST-1 of bfd_target_vector (targets across,
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architectures down). */
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static int
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display_info_table (int first, int last)
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{
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int t;
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int ret = 1;
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char *dummy_name;
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int a;
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/* Print heading of target names. */
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printf ("\n%*s", (int) LONGEST_ARCH, " ");
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for (t = first; t < last && bfd_target_vector[t]; t++)
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printf ("%s ", bfd_target_vector[t]->name);
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putchar ('\n');
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dummy_name = make_temp_file (NULL);
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for (a = bfd_arch_obscure + 1; a < bfd_arch_last; a++)
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if (strcmp (bfd_printable_arch_mach ((enum bfd_architecture) a, 0),
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"UNKNOWN!") != 0)
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{
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printf ("%*s ", (int) LONGEST_ARCH - 1,
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bfd_printable_arch_mach ((enum bfd_architecture) a, 0));
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for (t = first; t < last && bfd_target_vector[t]; t++)
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{
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const bfd_target *p = bfd_target_vector[t];
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bfd_boolean ok = TRUE;
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bfd *abfd = bfd_openw (dummy_name, p->name);
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if (abfd == NULL)
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{
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bfd_nonfatal (p->name);
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ret = 0;
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ok = FALSE;
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}
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if (ok)
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{
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if (! bfd_set_format (abfd, bfd_object))
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{
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if (bfd_get_error () != bfd_error_invalid_operation)
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{
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bfd_nonfatal (p->name);
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ret = 0;
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}
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ok = FALSE;
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}
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}
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if (ok)
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{
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if (! bfd_set_arch_mach (abfd, (enum bfd_architecture) a, 0))
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ok = FALSE;
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}
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if (ok)
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printf ("%s ", p->name);
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else
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{
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int l = strlen (p->name);
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while (l--)
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putchar ('-');
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putchar (' ');
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}
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if (abfd != NULL)
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bfd_close_all_done (abfd);
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}
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putchar ('\n');
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}
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unlink (dummy_name);
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free (dummy_name);
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return ret;
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}
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/* Print tables of all the target-architecture combinations that
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BFD has been configured to support. */
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static int
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display_target_tables (void)
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{
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int t;
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int columns;
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int ret = 1;
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char *colum;
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columns = 0;
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colum = getenv ("COLUMNS");
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if (colum != NULL)
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columns = atoi (colum);
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if (columns == 0)
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columns = 80;
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t = 0;
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while (bfd_target_vector[t] != NULL)
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{
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int oldt = t, wid;
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wid = LONGEST_ARCH + strlen (bfd_target_vector[t]->name) + 1;
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++t;
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while (wid < columns && bfd_target_vector[t] != NULL)
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{
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int newwid;
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newwid = wid + strlen (bfd_target_vector[t]->name) + 1;
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if (newwid >= columns)
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break;
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wid = newwid;
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++t;
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}
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if (! display_info_table (oldt, t))
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ret = 0;
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}
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return ret;
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}
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int
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display_info (void)
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{
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printf (_("BFD header file version %s\n"), BFD_VERSION_STRING);
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if (! display_target_list () || ! display_target_tables ())
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return 1;
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else
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return 0;
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}
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/* Display the archive header for an element as if it were an ls -l listing:
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Mode User\tGroup\tSize\tDate Name */
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void
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print_arelt_descr (FILE *file, bfd *abfd, bfd_boolean verbose)
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{
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struct stat buf;
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if (verbose)
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{
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if (bfd_stat_arch_elt (abfd, &buf) == 0)
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{
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char modebuf[11];
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char timebuf[40];
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time_t when = buf.st_mtime;
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const char *ctime_result = (const char *) ctime (&when);
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bfd_size_type size;
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/* PR binutils/17605: Check for corrupt time values. */
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if (ctime_result == NULL)
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sprintf (timebuf, _("<time data corrupt>"));
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else
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/* POSIX format: skip weekday and seconds from ctime output. */
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sprintf (timebuf, "%.12s %.4s", ctime_result + 4, ctime_result + 20);
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mode_string (buf.st_mode, modebuf);
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modebuf[10] = '\0';
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size = buf.st_size;
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/* POSIX 1003.2/D11 says to skip first character (entry type). */
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fprintf (file, "%s %ld/%ld %6" BFD_VMA_FMT "u %s ", modebuf + 1,
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(long) buf.st_uid, (long) buf.st_gid,
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size, timebuf);
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}
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}
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fprintf (file, "%s\n", bfd_get_filename (abfd));
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}
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/* Return a path for a new temporary file in the same directory
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as file PATH. */
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static char *
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template_in_dir (const char *path)
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{
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#define template "stXXXXXX"
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const char *slash = strrchr (path, '/');
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char *tmpname;
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size_t len;
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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{
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/* We could have foo/bar\\baz, or foo\\bar, or d:bar. */
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char *bslash = strrchr (path, '\\');
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if (slash == NULL || (bslash != NULL && bslash > slash))
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slash = bslash;
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if (slash == NULL && path[0] != '\0' && path[1] == ':')
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slash = path + 1;
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}
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#endif
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if (slash != (char *) NULL)
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{
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len = slash - path;
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tmpname = (char *) xmalloc (len + sizeof (template) + 2);
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memcpy (tmpname, path, len);
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#ifdef HAVE_DOS_BASED_FILE_SYSTEM
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/* If tmpname is "X:", appending a slash will make it a root
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directory on drive X, which is NOT the same as the current
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directory on drive X. */
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if (len == 2 && tmpname[1] == ':')
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tmpname[len++] = '.';
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#endif
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tmpname[len++] = '/';
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}
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else
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{
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tmpname = (char *) xmalloc (sizeof (template));
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len = 0;
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}
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memcpy (tmpname + len, template, sizeof (template));
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return tmpname;
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#undef template
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}
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/* Return the name of a created temporary file in the same directory
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as FILENAME. */
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char *
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make_tempname (char *filename)
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{
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char *tmpname = template_in_dir (filename);
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int fd;
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#ifdef HAVE_MKSTEMP
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fd = mkstemp (tmpname);
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#else
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tmpname = mktemp (tmpname);
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if (tmpname == NULL)
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return NULL;
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fd = open (tmpname, O_RDWR | O_CREAT | O_EXCL, 0600);
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#endif
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if (fd == -1)
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{
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free (tmpname);
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return NULL;
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}
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close (fd);
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return tmpname;
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}
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/* Return the name of a created temporary directory inside the
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directory containing FILENAME. */
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char *
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make_tempdir (char *filename)
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{
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char *tmpname = template_in_dir (filename);
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#ifdef HAVE_MKDTEMP
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return mkdtemp (tmpname);
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#else
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tmpname = mktemp (tmpname);
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if (tmpname == NULL)
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return NULL;
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#if defined (_WIN32) && !defined (__CYGWIN32__)
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if (mkdir (tmpname) != 0)
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return NULL;
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#else
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if (mkdir (tmpname, 0700) != 0)
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return NULL;
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#endif
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return tmpname;
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#endif
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}
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/* Parse a string into a VMA, with a fatal error if it can't be
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parsed. */
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bfd_vma
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parse_vma (const char *s, const char *arg)
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{
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bfd_vma ret;
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const char *end;
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ret = bfd_scan_vma (s, &end, 0);
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if (*end != '\0')
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fatal (_("%s: bad number: %s"), arg, s);
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return ret;
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}
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|
||
/* Returns the size of the named file. If the file does not
|
||
exist, or if it is not a real file, then a suitable non-fatal
|
||
error message is printed and (off_t) -1 is returned. */
|
||
|
||
off_t
|
||
get_file_size (const char * file_name)
|
||
{
|
||
struct stat statbuf;
|
||
|
||
if (stat (file_name, &statbuf) < 0)
|
||
{
|
||
if (errno == ENOENT)
|
||
non_fatal (_("'%s': No such file"), file_name);
|
||
else
|
||
non_fatal (_("Warning: could not locate '%s'. reason: %s"),
|
||
file_name, strerror (errno));
|
||
}
|
||
else if (! S_ISREG (statbuf.st_mode))
|
||
non_fatal (_("Warning: '%s' is not an ordinary file"), file_name);
|
||
else if (statbuf.st_size < 0)
|
||
non_fatal (_("Warning: '%s' has negative size, probably it is too large"),
|
||
file_name);
|
||
else
|
||
return statbuf.st_size;
|
||
|
||
return (off_t) -1;
|
||
}
|
||
|
||
/* Return the filename in a static buffer. */
|
||
|
||
const char *
|
||
bfd_get_archive_filename (const bfd *abfd)
|
||
{
|
||
static size_t curr = 0;
|
||
static char *buf;
|
||
size_t needed;
|
||
|
||
assert (abfd != NULL);
|
||
|
||
if (!abfd->my_archive)
|
||
return bfd_get_filename (abfd);
|
||
|
||
needed = (strlen (bfd_get_filename (abfd->my_archive))
|
||
+ strlen (bfd_get_filename (abfd)) + 3);
|
||
if (needed > curr)
|
||
{
|
||
if (curr)
|
||
free (buf);
|
||
curr = needed + (needed >> 1);
|
||
buf = (char *) bfd_malloc (curr);
|
||
/* If we can't malloc, fail safe by returning just the file name.
|
||
This function is only used when building error messages. */
|
||
if (!buf)
|
||
{
|
||
curr = 0;
|
||
return bfd_get_filename (abfd);
|
||
}
|
||
}
|
||
sprintf (buf, "%s(%s)", bfd_get_filename (abfd->my_archive),
|
||
bfd_get_filename (abfd));
|
||
return buf;
|
||
}
|
||
|
||
/* Returns TRUE iff PATHNAME, a filename of an archive member,
|
||
is valid for writing. For security reasons absolute paths
|
||
and paths containing /../ are not allowed. See PR 17533. */
|
||
|
||
bfd_boolean
|
||
is_valid_archive_path (char const * pathname)
|
||
{
|
||
const char * n = pathname;
|
||
|
||
if (IS_ABSOLUTE_PATH (n))
|
||
return FALSE;
|
||
|
||
while (*n)
|
||
{
|
||
if (*n == '.' && *++n == '.' && ( ! *++n || IS_DIR_SEPARATOR (*n)))
|
||
return FALSE;
|
||
|
||
while (*n && ! IS_DIR_SEPARATOR (*n))
|
||
n++;
|
||
while (IS_DIR_SEPARATOR (*n))
|
||
n++;
|
||
}
|
||
|
||
return TRUE;
|
||
}
|