| 1 | /* Utility to pick a temporary filename prefix. |
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| 2 | Copyright (C) 1996-2024 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 | #include <sys/types.h> |
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| 26 | #ifdef HAVE_UNISTD_H |
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| 27 | #include <unistd.h> |
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| 28 | #endif |
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| 29 | #ifdef HAVE_STDLIB_H |
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| 30 | #include <stdlib.h> |
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| 31 | #endif |
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| 32 | #ifdef HAVE_STRING_H |
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| 33 | #include <string.h> |
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| 34 | #endif |
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| 35 | |
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| 36 | #include "libiberty.h" |
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| 37 | |
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| 38 | /* Name of temporary file. |
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| 39 | mktemp requires 6 trailing X's. */ |
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| 40 | #define TEMP_FILE "ccXXXXXX" |
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| 41 | #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) |
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| 42 | |
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| 43 | /* |
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| 44 | |
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| 45 | @deftypefn Extension char* choose_temp_base (void) |
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| 46 | |
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| 47 | Return a prefix for temporary file names or @code{NULL} if unable to |
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| 48 | find one. The current directory is chosen if all else fails so the |
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| 49 | program is exited if a temporary directory can't be found (@code{mktemp} |
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| 50 | fails). The buffer for the result is obtained with @code{xmalloc}. |
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| 51 | |
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| 52 | This function is provided for backwards compatibility only. Its use is |
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| 53 | not recommended. |
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| 54 | |
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| 55 | @end deftypefn |
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| 56 | |
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| 57 | */ |
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| 58 | |
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| 59 | char * |
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| 60 | choose_temp_base (void) |
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| 61 | { |
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| 62 | const char *base = choose_tmpdir (); |
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| 63 | char *temp_filename; |
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| 64 | int len; |
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| 65 | |
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| 66 | len = strlen (s: base); |
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| 67 | temp_filename = XNEWVEC (char, len + TEMP_FILE_LEN + 1); |
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| 68 | strcpy (dest: temp_filename, src: base); |
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| 69 | strcpy (dest: temp_filename + len, TEMP_FILE); |
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| 70 | |
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| 71 | if (mktemp (template: temp_filename) == 0) |
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| 72 | abort (); |
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| 73 | return temp_filename; |
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| 74 | } |
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| 75 | |
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