2003-03-11 Aldy Hernandez <aldyh@redhat.com>
[official-gcc.git] / libiberty / choose-temp.c
blob5c2c6140dbf52bb4fcd04be5380f426ebb19fa37
1 /* Utility to pick a temporary filename prefix.
2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
4 This file is part of the libiberty library.
5 Libiberty is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Library General Public
7 License as published by the Free Software Foundation; either
8 version 2 of the License, or (at your option) any later version.
10 Libiberty is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Library General Public License for more details.
15 You should have received a copy of the GNU Library General Public
16 License along with libiberty; see the file COPYING.LIB. If not,
17 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
20 #ifdef HAVE_CONFIG_H
21 #include "config.h"
22 #endif
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
32 #include "libiberty.h"
33 extern char *choose_tmpdir PARAMS ((void));
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)
42 @deftypefn Extension char* choose_temp_base (void)
44 Return a prefix for temporary file names or @code{NULL} if unable to
45 find one. The current directory is chosen if all else fails so the
46 program is exited if a temporary directory can't be found (@code{mktemp}
47 fails). The buffer for the result is obtained with @code{xmalloc}.
49 This function is provided for backwards compatability only. Its use is
50 not recommended.
52 @end deftypefn
56 char *
57 choose_temp_base ()
59 const char *base = choose_tmpdir ();
60 char *temp_filename;
61 int len;
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);
68 mktemp (temp_filename);
69 if (strlen (temp_filename) == 0)
70 abort ();
71 return temp_filename;