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https://sourceware.org/git/binutils-gdb.git
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c42c71a152
This patch makes use of the temp file descriptor in smart_rename rather than reopening the file. I don't believe there is a security issue in reopening the file, but this way is one less directory operation. The patch also attempts to preserve S_ISUID and S_ISGID. PR 27456 * bucomm.h (smart_rename): Update prototype. * rename.c (smart_rename): Add fromfd and preserve_dates params. Pass fromfd and target_stat to simple_copy. Call set_times when preserve_dates. (simple_copy): Accept fromfd rather than from filename. Add target_stat param. Rewind fromfd rather than opening. Open "to" file without O_CREAT. Try to preserve S_ISUID and S_ISGID. * ar.c (write_archive): Rename ofd to tmpfd. Dup tmpfd before closing output temp file, and pass tmpfd to smart_rename. * arsup.c (temp_fd): Rename from real_fd. (ar_save): Dup temp_fd and pass to smart_rename. * objcopy.c (strip_main, copy_main): Likewise, and pass preserve_dates.
511 lines
9.9 KiB
C
511 lines
9.9 KiB
C
/* arsup.c - Archive support for MRI compatibility
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Copyright (C) 1992-2021 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,
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MA 02110-1301, USA. */
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/* Contributed by Steve Chamberlain
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sac@cygnus.com
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This file looks after requests from arparse.y, to provide the MRI
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style librarian command syntax + 1 word LIST. */
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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 "bucomm.h"
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#include "arsup.h"
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static void map_over_list
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(bfd *, void (*function) (bfd *, bfd *), struct list *);
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static void ar_directory_doer (bfd *, bfd *);
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static void ar_addlib_doer (bfd *, bfd *);
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extern int verbose;
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extern int deterministic;
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static bfd *obfd;
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static char *real_name;
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static char *temp_name;
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static int temp_fd;
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static FILE *outfile;
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static void
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map_over_list (bfd *arch, void (*function) (bfd *, bfd *), struct list *list)
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{
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bfd *head;
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if (list == NULL)
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{
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bfd *next;
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head = arch->archive_next;
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while (head != NULL)
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{
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next = head->archive_next;
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function (head, (bfd *) NULL);
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head = next;
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}
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}
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else
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{
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struct list *ptr;
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/* This may appear to be a baroque way of accomplishing what we
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want. however we have to iterate over the filenames in order
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to notice where a filename is requested but does not exist in
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the archive. Ditto mapping over each file each time -- we
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want to hack multiple references. */
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for (ptr = list; ptr; ptr = ptr->next)
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{
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bfd_boolean found = FALSE;
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bfd *prev = arch;
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for (head = arch->archive_next; head; head = head->archive_next)
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{
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if (bfd_get_filename (head) != NULL
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&& FILENAME_CMP (ptr->name, bfd_get_filename (head)) == 0)
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{
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found = TRUE;
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function (head, prev);
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}
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prev = head;
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}
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if (! found)
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fprintf (stderr, _("No entry %s in archive.\n"), ptr->name);
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}
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}
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}
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static void
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ar_directory_doer (bfd *abfd, bfd *ignore ATTRIBUTE_UNUSED)
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{
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print_arelt_descr(outfile, abfd, verbose, FALSE);
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}
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void
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ar_directory (char *ar_name, struct list *list, char *output)
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{
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bfd *arch;
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arch = open_inarch (ar_name, (char *) NULL);
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if (output)
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{
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outfile = fopen(output,"w");
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if (outfile == 0)
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{
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outfile = stdout;
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fprintf (stderr,_("Can't open file %s\n"), output);
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output = 0;
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}
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}
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else
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outfile = stdout;
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map_over_list (arch, ar_directory_doer, list);
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bfd_close (arch);
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if (output)
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fclose (outfile);
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}
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void
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prompt (void)
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{
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extern int interactive;
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if (interactive)
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{
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printf ("AR >");
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fflush (stdout);
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}
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}
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void
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maybequit (void)
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{
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if (! interactive)
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xexit (9);
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}
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void
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ar_open (char *name, int t)
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{
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real_name = xstrdup (name);
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temp_name = make_tempname (real_name, &temp_fd);
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if (temp_name == NULL)
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{
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fprintf (stderr, _("%s: Can't open temporary file (%s)\n"),
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program_name, strerror(errno));
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maybequit ();
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return;
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}
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obfd = bfd_fdopenw (temp_name, NULL, temp_fd);
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if (!obfd)
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{
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fprintf (stderr,
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_("%s: Can't open output archive %s\n"),
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program_name, temp_name);
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maybequit ();
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}
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else
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{
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if (!t)
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{
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bfd **ptr;
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bfd *element;
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bfd *ibfd;
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ibfd = bfd_openr (name, NULL);
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if (!ibfd)
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{
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fprintf (stderr,_("%s: Can't open input archive %s\n"),
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program_name, name);
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maybequit ();
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return;
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}
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if (!bfd_check_format(ibfd, bfd_archive))
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{
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fprintf (stderr,
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_("%s: file %s is not an archive\n"),
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program_name, name);
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maybequit ();
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return;
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}
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ptr = &(obfd->archive_head);
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element = bfd_openr_next_archived_file (ibfd, NULL);
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while (element)
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{
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*ptr = element;
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ptr = &element->archive_next;
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element = bfd_openr_next_archived_file (ibfd, element);
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}
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}
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bfd_set_format (obfd, bfd_archive);
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obfd->has_armap = 1;
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obfd->is_thin_archive = 0;
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}
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}
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static void
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ar_addlib_doer (bfd *abfd, bfd *prev)
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{
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/* Add this module to the output bfd. */
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if (prev != NULL)
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prev->archive_next = abfd->archive_next;
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abfd->archive_next = obfd->archive_head;
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obfd->archive_head = abfd;
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}
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void
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ar_addlib (char *name, struct list *list)
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{
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if (obfd == NULL)
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{
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fprintf (stderr, _("%s: no output archive specified yet\n"), program_name);
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maybequit ();
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}
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else
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{
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bfd *arch;
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arch = open_inarch (name, (char *) NULL);
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if (arch != NULL)
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map_over_list (arch, ar_addlib_doer, list);
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/* Don't close the bfd, since it will make the elements disappear. */
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}
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}
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void
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ar_addmod (struct list *list)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open output archive\n"), program_name);
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maybequit ();
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}
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else
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{
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while (list)
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{
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bfd *abfd;
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#if BFD_SUPPORTS_PLUGINS
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abfd = bfd_openr (list->name, "plugin");
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#else
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abfd = bfd_openr (list->name, NULL);
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#endif
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if (!abfd)
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{
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fprintf (stderr, _("%s: can't open file %s\n"),
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program_name, list->name);
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maybequit ();
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}
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else
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{
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abfd->archive_next = obfd->archive_head;
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obfd->archive_head = abfd;
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}
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list = list->next;
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}
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}
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}
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void
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ar_clear (void)
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{
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if (obfd)
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obfd->archive_head = 0;
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}
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void
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ar_delete (struct list *list)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open output archive\n"), program_name);
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maybequit ();
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}
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else
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{
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while (list)
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{
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/* Find this name in the archive. */
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bfd *member = obfd->archive_head;
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bfd **prev = &(obfd->archive_head);
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int found = 0;
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while (member)
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{
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if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
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{
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*prev = member->archive_next;
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found = 1;
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}
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else
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prev = &(member->archive_next);
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member = member->archive_next;
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}
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if (!found)
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{
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fprintf (stderr, _("%s: can't find module file %s\n"),
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program_name, list->name);
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maybequit ();
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}
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list = list->next;
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}
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}
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}
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void
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ar_save (void)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open output archive\n"), program_name);
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maybequit ();
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}
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else
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{
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struct stat target_stat;
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if (deterministic > 0)
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obfd->flags |= BFD_DETERMINISTIC_OUTPUT;
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temp_fd = dup (temp_fd);
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bfd_close (obfd);
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if (stat (real_name, &target_stat) != 0)
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{
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/* The temp file created in ar_open has mode 0600 as per mkstemp.
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Create the real empty output file here so smart_rename will
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update the mode according to the process umask. */
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obfd = bfd_openw (real_name, NULL);
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if (obfd != NULL)
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{
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bfd_set_format (obfd, bfd_archive);
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bfd_close (obfd);
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}
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}
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smart_rename (temp_name, real_name, temp_fd, NULL, FALSE);
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obfd = 0;
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free (temp_name);
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free (real_name);
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}
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}
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void
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ar_replace (struct list *list)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open output archive\n"), program_name);
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maybequit ();
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}
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else
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{
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while (list)
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{
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/* Find this name in the archive. */
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bfd *member = obfd->archive_head;
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bfd **prev = &(obfd->archive_head);
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int found = 0;
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while (member)
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{
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if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
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{
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/* Found the one to replace. */
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bfd *abfd = bfd_openr (list->name, NULL);
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if (!abfd)
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{
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fprintf (stderr, _("%s: can't open file %s\n"),
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program_name, list->name);
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maybequit ();
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}
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else
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{
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*prev = abfd;
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abfd->archive_next = member->archive_next;
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found = 1;
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}
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}
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else
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{
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prev = &(member->archive_next);
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}
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member = member->archive_next;
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}
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if (!found)
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{
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bfd *abfd = bfd_openr (list->name, NULL);
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fprintf (stderr,_("%s: can't find module file %s\n"),
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program_name, list->name);
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if (!abfd)
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{
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fprintf (stderr, _("%s: can't open file %s\n"),
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program_name, list->name);
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maybequit ();
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}
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else
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*prev = abfd;
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}
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list = list->next;
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}
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}
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}
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/* And I added this one. */
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void
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ar_list (void)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open output archive\n"), program_name);
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maybequit ();
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}
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else
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{
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bfd *abfd;
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outfile = stdout;
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verbose =1 ;
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printf (_("Current open archive is %s\n"), bfd_get_filename (obfd));
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for (abfd = obfd->archive_head;
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abfd != (bfd *)NULL;
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abfd = abfd->archive_next)
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ar_directory_doer (abfd, (bfd *) NULL);
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}
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}
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void
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ar_end (void)
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{
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if (obfd)
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{
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bfd_cache_close (obfd);
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unlink (bfd_get_filename (obfd));
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}
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}
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void
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ar_extract (struct list *list)
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{
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if (!obfd)
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{
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fprintf (stderr, _("%s: no open archive\n"), program_name);
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maybequit ();
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}
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else
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{
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while (list)
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{
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/* Find this name in the archive. */
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bfd *member = obfd->archive_head;
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int found = 0;
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while (member && !found)
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{
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if (FILENAME_CMP (bfd_get_filename (member), list->name) == 0)
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{
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extract_file (member);
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found = 1;
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}
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member = member->archive_next;
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}
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if (!found)
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{
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bfd_openr (list->name, NULL);
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fprintf (stderr, _("%s: can't find module file %s\n"),
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program_name, list->name);
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}
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list = list->next;
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}
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}
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}
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