1 /* Create a temporary file.
2 Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Ben Pfaff. */
24 /* This replacement is used only on native Windows platforms. */
33 #define WIN32_LEAN_AND_MEAN /* avoid including junk */
40 /* On Windows, opening a file with _O_TEMPORARY has the effect of passing
41 the FILE_FLAG_DELETE_ON_CLOSE flag to CreateFile(), which has the effect
42 of deleting the file when it is closed - even when the program crashes.
43 But (according to the Cygwin sources) it works only on Windows NT or newer.
44 So we cache the info whether we are running on Windows NT or newer. */
47 supports_delete_on_close ()
49 static int known; /* 1 = yes, -1 = no, 0 = unknown */
54 if (GetVersionEx (&v))
55 known = (v.dwPlatformId == VER_PLATFORM_WIN32_NT ? 1 : -1);
68 /* Find Windows temporary file directory.
69 We provide this as the directory argument to path_search because Windows
70 defines P_tmpdir to "\\" and will therefore try to put all temporary files
71 in the root directory (unless $TMPDIR is set). */
72 retval = GetTempPath (PATH_MAX, dir);
73 if (retval > 0 && retval < PATH_MAX)
75 char xtemplate[PATH_MAX];
77 if (path_search (xtemplate, PATH_MAX, dir, NULL, true) >= 0)
79 size_t len = strlen (xtemplate);
80 int o_temporary = (supports_delete_on_close () ? _O_TEMPORARY : 0);
85 memcpy (&xtemplate[len - 6], "XXXXXX", 6);
86 if (gen_tempname (xtemplate, 0, 0, GT_NOCREATE) < 0)
92 fd = _open (xtemplate,
93 _O_CREAT | _O_EXCL | o_temporary
94 | _O_RDWR | _O_BINARY,
95 _S_IREAD | _S_IWRITE);
97 while (fd < 0 && errno == EEXIST);
101 FILE *fp = _fdopen (fd, "w+b");
107 int saved_errno = errno;
117 errno = ENAMETOOLONG;
119 /* Ideally this should translate GetLastError () to an errno value. */