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1 /* Utility to pick a temporary filename prefix.
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2 Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
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3
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4 This file is part of the libiberty library.
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5 Libiberty is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 Libiberty is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with libiberty; see the file COPYING.LIB. If not,
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17 write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
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18 Boston, MA 02110-1301, USA. */
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19
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20 #ifdef HAVE_CONFIG_H
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21 #include "config.h"
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22 #endif
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23
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24 #include <stdio.h> /* May get P_tmpdir. */
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25 #ifdef HAVE_STDLIB_H
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26 #include <stdlib.h>
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27 #endif
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28 #ifdef HAVE_STRING_H
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29 #include <string.h>
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30 #endif
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31
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32 #include "libiberty.h"
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33 extern char *choose_tmpdir (void);
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34
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35 /* Name of temporary file.
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36 mktemp requires 6 trailing X's. */
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37 #define TEMP_FILE "ccXXXXXX"
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38 #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
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39
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40 /*
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41
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42 @deftypefn Extension char* choose_temp_base (void)
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43
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44 Return a prefix for temporary file names or @code{NULL} if unable to
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45 find one. The current directory is chosen if all else fails so the
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46 program is exited if a temporary directory can't be found (@code{mktemp}
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47 fails). The buffer for the result is obtained with @code{xmalloc}.
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48
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49 This function is provided for backwards compatibility only. Its use is
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50 not recommended.
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51
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52 @end deftypefn
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53
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54 */
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55
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56 char *
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57 choose_temp_base (void)
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58 {
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59 const char *base = choose_tmpdir ();
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60 char *temp_filename;
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61 int len;
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62
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63 len = strlen (base);
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64 temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1);
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65 strcpy (temp_filename, base);
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66 strcpy (temp_filename + len, TEMP_FILE);
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67
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68 if (mktemp (temp_filename) == 0)
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69 abort ();
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70 return temp_filename;
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71 }
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