Merge branch 'master' of ssh://crater.dragonflybsd.org/repository/git/dragonfly
[dragonfly.git] / contrib / gcc-3.4 / libiberty / choose-temp.c
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1/* Utility to pick a temporary filename prefix.
2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
3
4This file is part of the libiberty library.
5Libiberty is free software; you can redistribute it and/or
6modify it under the terms of the GNU Library General Public
7License as published by the Free Software Foundation; either
8version 2 of the License, or (at your option) any later version.
9
10Libiberty is distributed in the hope that it will be useful,
11but WITHOUT ANY WARRANTY; without even the implied warranty of
12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13Library General Public License for more details.
14
15You should have received a copy of the GNU Library General Public
16License along with libiberty; see the file COPYING.LIB. If not,
17write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18Boston, MA 02111-1307, USA. */
19
20#ifdef HAVE_CONFIG_H
21#include "config.h"
22#endif
23
24#include <stdio.h> /* May get P_tmpdir. */
25#ifdef HAVE_STDLIB_H
26#include <stdlib.h>
27#endif
28#ifdef HAVE_STRING_H
29#include <string.h>
30#endif
31
32#include "libiberty.h"
33extern char *choose_tmpdir PARAMS ((void));
34
35/* Name of temporary file.
36 mktemp requires 6 trailing X's. */
37#define TEMP_FILE "ccXXXXXX"
38#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
39
40/*
41
42@deftypefn Extension char* choose_temp_base (void)
43
44Return a prefix for temporary file names or @code{NULL} if unable to
45find one. The current directory is chosen if all else fails so the
46program is exited if a temporary directory can't be found (@code{mktemp}
47fails). The buffer for the result is obtained with @code{xmalloc}.
48
49This function is provided for backwards compatability only. Its use is
50not recommended.
51
52@end deftypefn
53
54*/
55
56char *
57choose_temp_base ()
58{
59 const char *base = choose_tmpdir ();
60 char *temp_filename;
61 int len;
62
63 len = strlen (base);
64 temp_filename = xmalloc (len + TEMP_FILE_LEN + 1);
65 strcpy (temp_filename, base);
66 strcpy (temp_filename + len, TEMP_FILE);
67
68 mktemp (temp_filename);
69 if (strlen (temp_filename) == 0)
70 abort ();
71 return temp_filename;
72}