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Rev | Author | Line No. | Line |
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5191 | serge | 1 | /* Utility to pick a temporary filename prefix. |
2 | Copyright (C) 1996, 1997, 1998, 2001, 2009, 2010 |
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3 | Free Software Foundation, Inc. |
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4 | |||
5 | This file is part of the libiberty library. |
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6 | Libiberty is free software; you can redistribute it and/or |
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7 | modify it under the terms of the GNU Library General Public |
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8 | License as published by the Free Software Foundation; either |
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9 | version 2 of the License, or (at your option) any later version. |
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10 | |||
11 | Libiberty is distributed in the hope that it will be useful, |
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12 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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14 | Library General Public License for more details. |
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15 | |||
16 | You should have received a copy of the GNU Library General Public |
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17 | License along with libiberty; see the file COPYING.LIB. If not, |
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18 | write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, |
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19 | Boston, MA 02110-1301, USA. */ |
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20 | |||
21 | #ifdef HAVE_CONFIG_H |
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22 | #include "config.h" |
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23 | #endif |
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24 | |||
25 | #include |
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26 | #include |
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27 | #include |
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28 | #ifdef HAVE_UNISTD_H |
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29 | #include |
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30 | #endif |
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31 | #ifdef HAVE_STDLIB_H |
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32 | #include |
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33 | #endif |
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34 | #ifdef HAVE_STRING_H |
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35 | #include |
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36 | #endif |
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37 | #ifdef HAVE_SYS_FILE_H |
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38 | #include |
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39 | #endif |
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40 | #if defined(_WIN32) && !defined(__CYGWIN__) |
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41 | #include |
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42 | #endif |
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43 | |||
44 | #ifndef R_OK |
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45 | #define R_OK 4 |
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46 | #define W_OK 2 |
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47 | #define X_OK 1 |
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48 | #endif |
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49 | |||
50 | #include "libiberty.h" |
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51 | extern int mkstemps (char *, int); |
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52 | |||
53 | /* '/' works just fine on MS-DOS based systems. */ |
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54 | #ifndef DIR_SEPARATOR |
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55 | #define DIR_SEPARATOR '/' |
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56 | #endif |
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57 | |||
58 | /* Name of temporary file. |
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59 | mktemp requires 6 trailing X's. */ |
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60 | #define TEMP_FILE "ccXXXXXX" |
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61 | #define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1) |
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62 | |||
63 | #if !defined(_WIN32) || defined(__CYGWIN__) |
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64 | |||
65 | /* Subroutine of choose_tmpdir. |
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66 | If BASE is non-NULL, return it. |
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67 | Otherwise it checks if DIR is a usable directory. |
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68 | If success, DIR is returned. |
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69 | Otherwise NULL is returned. */ |
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70 | |||
71 | static inline const char *try_dir (const char *, const char *); |
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72 | |||
73 | static inline const char * |
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74 | try_dir (const char *dir, const char *base) |
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75 | { |
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76 | if (base != 0) |
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77 | return base; |
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78 | if (dir != 0 |
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79 | && access (dir, R_OK | W_OK | X_OK) == 0) |
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80 | return dir; |
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81 | return 0; |
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82 | } |
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83 | |||
84 | static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
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85 | static const char usrtmp[] = |
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86 | { DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
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87 | static const char vartmp[] = |
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88 | { DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 }; |
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89 | |||
90 | #endif |
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91 | |||
5217 | serge | 92 | //static char *memoized_tmpdir; |
5191 | serge | 93 | |
94 | /* |
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95 | |||
6324 | serge | 96 | @deftypefn Replacement const char* choose_tmpdir () |
5191 | serge | 97 | |
98 | Returns a pointer to a directory path suitable for creating temporary |
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99 | files in. |
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100 | |||
101 | @end deftypefn |
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102 | |||
103 | */ |
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104 | |||
6324 | serge | 105 | const char * |
5191 | serge | 106 | choose_tmpdir (void) |
107 | { |
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5217 | serge | 108 | return "/tmp0/1/"; |
5191 | serge | 109 | } |
110 | |||
111 | /* |
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112 | |||
113 | @deftypefn Replacement char* make_temp_file (const char *@var{suffix}) |
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114 | |||
115 | Return a temporary file name (as a string) or @code{NULL} if unable to |
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116 | create one. @var{suffix} is a suffix to append to the file name. The |
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117 | string is @code{malloc}ed, and the temporary file has been created. |
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118 | |||
119 | @end deftypefn |
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120 | |||
121 | */ |
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122 | |||
123 | char * |
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124 | make_temp_file (const char *suffix) |
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125 | { |
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126 | const char *base = choose_tmpdir (); |
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127 | char *temp_filename; |
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128 | int base_len, suffix_len; |
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129 | int fd; |
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130 | |||
131 | if (suffix == 0) |
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132 | suffix = ""; |
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133 | |||
134 | base_len = strlen (base); |
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135 | suffix_len = strlen (suffix); |
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136 | |||
137 | temp_filename = XNEWVEC (char, base_len |
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138 | + TEMP_FILE_LEN |
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139 | + suffix_len + 1); |
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140 | strcpy (temp_filename, base); |
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141 | strcpy (temp_filename + base_len, TEMP_FILE); |
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142 | strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix); |
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143 | |||
144 | fd = mkstemps (temp_filename, suffix_len); |
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145 | /* Mkstemps failed. It may be EPERM, ENOSPC etc. */ |
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146 | if (fd == -1) |
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147 | { |
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148 | fprintf (stderr, "Cannot create temporary file in %s: %s\n", |
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149 | base, strerror (errno)); |
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150 | abort (); |
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151 | } |
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152 | /* We abort on failed close out of sheer paranoia. */ |
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153 | if (close (fd)) |
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154 | abort (); |
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155 | return temp_filename; |
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156 | } |