| [2] | 1 | /* Utility to pick a temporary filename prefix.
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| 2 | Copyright (C) 1996, 1997, 1998, 2001 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., 59 Temple Place - Suite 330,
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| 18 | Boston, MA 02111-1307, 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 | #ifdef HAVE_SYS_FILE_H
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| 36 | #include <sys/file.h> /* May get R_OK, etc. on some systems. */
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| 37 | #endif
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| 38 |
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| 39 | #ifndef R_OK
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| 40 | #define R_OK 4
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| 41 | #define W_OK 2
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| 42 | #define X_OK 1
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| 43 | #endif
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| 44 |
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| 45 | #include "libiberty.h"
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| 46 | extern int mkstemps PARAMS ((char *, int));
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| 47 |
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| 48 | /* '/' works just fine on MS-DOS based systems. */
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| 49 | #ifndef DIR_SEPARATOR
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| 50 | #define DIR_SEPARATOR '/'
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| 51 | #endif
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| 52 |
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| 53 | /* Name of temporary file.
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| 54 | mktemp requires 6 trailing X's. */
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| 55 | #define TEMP_FILE "ccXXXXXX"
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| 56 | #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
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| 57 |
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| 58 | /* Subroutine of choose_tmpdir.
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| 59 | If BASE is non-NULL, return it.
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| 60 | Otherwise it checks if DIR is a usable directory.
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| 61 | If success, DIR is returned.
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| 62 | Otherwise NULL is returned. */
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| 63 |
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| 64 | static inline const char *try PARAMS ((const char *, const char *));
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| 65 |
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| 66 | static inline const char *
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| 67 | try (dir, base)
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| 68 | const char *dir, *base;
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| 69 | {
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| 70 | if (base != 0)
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| 71 | return base;
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| 72 | if (dir != 0
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| 73 | && access (dir, R_OK | W_OK | X_OK) == 0)
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| 74 | return dir;
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| 75 | return 0;
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| 76 | }
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| 77 |
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| 78 | static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 };
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| 79 | static const char usrtmp[] =
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| 80 | { DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
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| 81 | static const char vartmp[] =
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| 82 | { DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
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| 83 |
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| 84 | static char *memoized_tmpdir;
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| 85 |
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