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164c687cb6
* common/mischelp.c (timegm): Move to ... * common/gettime.c (timegm): here. On Windows use timegm_u32. (timegm_u32): New. (isotime2epoch): Factor code out to ... (isotime_make_tm): new helper. (isotime2epoch_u64): New. (_win32_timegm): Remove duplicated code. (parse_timestamp): Use of timegm. (scan_isodatestr): Fallback to isotime2epoch_u64. -- This mainly helps on 32 bit Windows. For Unix we assume everyone is using 64 bit or shall wait until the libc hackers finally provide a time64_t. GnuPG-bug-id: 6736
129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* mischelp.c - Miscellaneous helper functions
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* Copyright (C) 1998, 2000, 2001, 2006, 2007 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 and/or modify this
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* part of GnuPG under the terms of either
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*
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* - the GNU Lesser General Public License as published by the Free
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* Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* or
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*
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* - the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at
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* your option) any later version.
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*
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* or both in parallel, as here.
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*
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* GnuPG is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copies of the GNU General Public License
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* and the GNU Lesser General Public License along with this program;
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* 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 <string.h>
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#include <time.h>
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#ifdef HAVE_W32_SYSTEM
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# define WIN32_LEAN_AND_MEAN
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# include <windows.h>
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#else /*!HAVE_W32_SYSTEM*/
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# include <sys/types.h>
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# include <sys/stat.h>
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# include <unistd.h>
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#endif /*!HAVE_W32_SYSTEM*/
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#include <errno.h>
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#include "util.h"
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#include "common-defs.h"
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#include "stringhelp.h"
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#include "utf8conv.h"
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#include "mischelp.h"
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void
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wipememory (void *ptr, size_t len)
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{
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#if defined(HAVE_W32_SYSTEM) && defined(SecureZeroMemory)
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SecureZeroMemory (ptr, len);
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#elif defined(HAVE_EXPLICIT_BZERO)
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explicit_bzero (ptr, len);
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#else
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/* Prevent compiler from optimizing away the call to memset by accessing
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memset through volatile pointer. */
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static void *(*volatile memset_ptr)(void *, int, size_t) = (void *)memset;
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memset_ptr (ptr, 0, len);
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#endif
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}
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/* Check whether the files NAME1 and NAME2 are identical. This is for
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example achieved by comparing the inode numbers of the files. */
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int
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same_file_p (const char *name1, const char *name2)
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{
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int yes;
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/* First try a shortcut. */
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if (!compare_filenames (name1, name2))
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yes = 1;
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else
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{
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#ifdef HAVE_W32_SYSTEM
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HANDLE file1, file2;
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BY_HANDLE_FILE_INFORMATION info1, info2;
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wchar_t *wname;
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wname = gpgrt_fname_to_wchar (name1);
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if (wname)
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{
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file1 = CreateFileW (wname, 0, 0, NULL, OPEN_EXISTING, 0, NULL);
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xfree (wname);
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}
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else
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file1 = INVALID_HANDLE_VALUE;
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if (file1 == INVALID_HANDLE_VALUE)
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yes = 0; /* If we can't open the file, it is not the same. */
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else
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{
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wname = gpgrt_fname_to_wchar (name2);
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if (wname)
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{
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file2 = CreateFileW (wname, 0, 0, NULL, OPEN_EXISTING, 0, NULL);
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xfree (wname);
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}
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else
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file2 = INVALID_HANDLE_VALUE;
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if (file2 == INVALID_HANDLE_VALUE)
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yes = 0; /* If we can't open the file, it is not the same. */
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else
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{
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yes = (GetFileInformationByHandle (file1, &info1)
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&& GetFileInformationByHandle (file2, &info2)
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&& info1.dwVolumeSerialNumber==info2.dwVolumeSerialNumber
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&& info1.nFileIndexHigh == info2.nFileIndexHigh
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&& info1.nFileIndexLow == info2.nFileIndexLow);
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CloseHandle (file2);
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}
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CloseHandle (file1);
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}
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#else /*!HAVE_W32_SYSTEM*/
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struct stat info1, info2;
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yes = (!stat (name1, &info1) && !stat (name2, &info2)
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&& info1.st_dev == info2.st_dev && info1.st_ino == info2.st_ino);
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#endif /*!HAVE_W32_SYSTEM*/
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}
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return yes;
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}
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