mirror of git://git.gnupg.org/gnupg.git
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/* keybox-util.c - Utility functions for Keybox
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* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This file is part of GnuPG.
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*
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* GnuPG 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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*
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* GnuPG 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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*
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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, see <https://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#ifdef HAVE_DOSISH_SYSTEM
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# define WIN32_LEAN_AND_MEAN /* We only need the OS core stuff. */
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# include <windows.h>
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#endif
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#include "keybox-defs.h"
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/* Store the two malloced temporary file names used for keybox updates
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of file FILENAME at R_BAKNAME and R_TMPNAME. On error an error
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code is returned and NULL stored at R_BAKNAME and R_TMPNAME. If
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FOR_KEYRING is true the returned names match those used by GnuPG's
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keyring code. */
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gpg_error_t
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keybox_tmp_names (const char *filename, int for_keyring,
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char **r_bakname, char **r_tmpname)
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{
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gpg_error_t err;
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char *bak_name, *tmp_name;
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*r_bakname = NULL;
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*r_tmpname = NULL;
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# ifdef USE_ONLY_8DOT3
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/* Here is another Windoze bug?:
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* you can't rename("pubring.kbx.tmp", "pubring.kbx");
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* but rename("pubring.kbx.tmp", "pubring.aaa");
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* works. So we replace ".kbx" by ".kb_" or ".k__". Note that we
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* can't use ".bak" and ".tmp", because these suffixes are used by
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* gpg's keyrings and would lead to a sharing violation or data
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* corruption. If the name does not end in ".kbx" we assume working
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* on a modern file system and append the suffix. */
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{
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const char *ext = for_keyring? EXTSEP_S GPGEXT_GPG : EXTSEP_S "kbx";
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const char *b_ext = for_keyring? EXTSEP_S "bak" : EXTSEP_S "kb_";
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const char *t_ext = for_keyring? EXTSEP_S "tmp" : EXTSEP_S "k__";
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int repl;
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if (strlen (ext) != 4 || strlen (b_ext) != 4)
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BUG ();
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repl = (strlen (filename) > 4
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&& !strcmp (filename + strlen (filename) - 4, ext));
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bak_name = xtrymalloc (strlen (filename) + (repl?0:4) + 1);
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if (!bak_name)
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return gpg_error_from_syserror ();
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strcpy (bak_name, filename);
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strcpy (bak_name + strlen (filename) - (repl?4:0), b_ext);
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tmp_name = xtrymalloc (strlen (filename) + (repl?0:4) + 1);
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if (!tmp_name)
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{
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err = gpg_error_from_syserror ();
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xfree (bak_name);
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return err;
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}
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strcpy (tmp_name, filename);
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strcpy (tmp_name + strlen (filename) - (repl?4:0), t_ext);
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}
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# else /* Posix file names */
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(void)for_keyring;
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bak_name = xtrymalloc (strlen (filename) + 2);
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if (!bak_name)
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return gpg_error_from_syserror ();
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strcpy (stpcpy (bak_name, filename), "~");
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tmp_name = xtrymalloc (strlen (filename) + 5);
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if (!tmp_name)
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{
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err = gpg_error_from_syserror ();
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xfree (bak_name);
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return err;
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}
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strcpy (stpcpy (tmp_name,filename), EXTSEP_S "tmp");
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# endif /* Posix filename */
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*r_bakname = bak_name;
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*r_tmpname = tmp_name;
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return 0;
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}
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