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annotate th_file.c @ 478:b1e80180818a

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Improve th_stat_path() some more and fix Windows issues.
author Matti Hamalainen <ccr@tnsp.org>
date Mon, 09 Jul 2018 09:25:51 +0300
parents 77d1af382e08
children 2aa2052cb17d
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * File, directory etc helper functions
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3 * Programmed and designed by Matti 'ccr' Hamalainen
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347bfd3e017e Bump copyright years.
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4 * (C) Copyright 2016-2018 Tecnic Software productions (TNSP)
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5 *
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6 * Please read file 'COPYING' for information on license and distribution.
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7 */
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8 #include "th_file.h"
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9 #include "th_string.h"
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10 #include <unistd.h>
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11 #ifdef TH_PLAT_WINDOWS
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12 # include <shlwapi.h>
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13 # include <shfolder.h>
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14 #else
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15 //# include <sys/wait.h>
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16 # include <sys/stat.h>
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17 # include <sys/types.h>
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18 #endif
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19
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20
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21 char * th_get_home_dir()
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22 {
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23 #if defined(TH_PLAT_WINDOWS)
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24 char tmpPath[MAX_PATH];
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25 if (SHGetFolderPath(NULL, CSIDL_APPDATA | CSIDL_FLAG_CREATE, NULL, 0, tmpPath) == S_OK)
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26 return th_strdup(tmpPath);
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27 #endif
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28 return th_strdup(getenv("HOME"));
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29 }
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30
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31
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32 char * th_get_data_dir()
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33 {
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34 #if defined(TH_PLAT_WINDOWS)
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35 char tmpPath[MAX_PATH];
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36 if (SHGetFolderPath(NULL, CSIDL_APPDATA | CSIDL_FLAG_CREATE, NULL, 0, tmpPath) == S_OK)
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37 return th_strdup(tmpPath);
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38 #endif
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39 return th_strdup(getenv("HOME"));
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40 }
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41
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42
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43 char * th_get_config_dir(const char *name)
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44 {
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45 #if defined(TH_PLAT_WINDOWS)
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46 // For Windows, we just use the appdata directory
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47 (void) name;
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48 return th_get_data_dir();
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49 #elif defined(USE_XDG)
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50 const char *xdgConfigDir = getenv("XDG_CONFIG_HOME");
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51
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52 // If XDG is enabled, try the environment variable first
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53 if (xdgConfigDir != NULL && strcmp(xdgConfigDir, ""))
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54 return th_strdup_printf("%s%c%s%c", xdgConfigDir, TH_DIR_SEPARATOR, name, TH_DIR_SEPARATOR);
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55 else
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56 {
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57 // Nope, try the obvious alternative
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58 char *data = th_get_data_dir();
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59 char *dir = th_strdup_printf("%s%c%s%c%s%c", data, TH_DIR_SEPARATOR, ".config", TH_DIR_SEPARATOR, name, TH_DIR_SEPARATOR);
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60 th_free(data);
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61 return dir;
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62 }
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63 #else
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64 // XDG not enabled
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65 (void) name;
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66 return th_get_data_dir();
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67 #endif
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68 }
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69
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70
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71 #ifdef TH_PLAT_WINDOWS
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72 static uint64_t th_convert_windows_time(FILETIME ftime)
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73 {
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74 uint64_t value = (((uint64_t) ftime.dwHighDateTime) << 32ULL) | ((uint64_t) ftime.dwLowDateTime);
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75
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76 // Naive conversion (1000 ns / 100) * ns - difference_between_win_to_unix_epoch
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77 return (value / ((1000 / 100) * 1000 * 1000)) - 11644473600ULL;;
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78 }
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79 #endif
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80
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81
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82 BOOL th_stat_path(const char *path, th_stat_data *data)
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83 {
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84 #ifdef TH_PLAT_WINDOWS
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85 WIN32_FILE_ATTRIBUTE_DATA fdata;
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86 if (!GetFileAttributesExA(path, GetFileExInfoStandard, &fdata))
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87 return FALSE;
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88
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89 data->size = (((uint64_t) fdata.nFileSizeHigh) << 32ULL) | ((uint64_t) fdata.nFileSizeLow);
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90 data->ctime = th_convert_windows_time(fdata.ftCreationTime);
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91 data->atime = th_convert_windows_time(fdata.ftLastAccessTime);
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92 data->mtime = th_convert_windows_time(fdata.ftLastWriteTime);
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93
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94 data->flags = (fdata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) ? TH_IS_DIR : 0;
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95 data->flags |= (fdata.dwFileAttributes & FILE_ATTRIBUTE_READONLY) ? 0 : TH_IS_WRITABLE;
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96 data->flags |= TH_IS_READABLE;
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97 #else
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98 uid_t id = geteuid();
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99 struct stat sb;
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100 if (stat(path, &sb) < 0)
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101 return FALSE;
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102
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103 data->size = sb.st_size;
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104 data->ctime = sb.st_ctime;
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105 data->atime = sb.st_atime;
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106 data->mtime = sb.st_mtime;
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107
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108 data->flags = S_ISDIR(sb.st_mode) ? TH_IS_DIR : 0;
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109 data->flags |= (id == sb.st_uid && (sb.st_mode & S_IWUSR)) ? TH_IS_WRITABLE : 0;
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110 data->flags |= (id == sb.st_uid && (sb.st_mode & S_IRUSR)) ? TH_IS_READABLE : 0;
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111 #endif
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112
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113 return TRUE;
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114 }
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115
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116
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117 BOOL th_mkdir_path(const char *cpath, int mode)
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118 {
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119 char save, *path = th_strdup(cpath);
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120 size_t start = 0, end;
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121 BOOL res = FALSE;
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122
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123 // If mode is 0, default to something sensible
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124 if (mode == 0)
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125 mode = 0711;
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126
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127 // Start creating the directory stucture
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128 do
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129 {
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130 // Split foremost path element out
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131 for (save = 0, end = start; path[end] != 0; end++)
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132 if (path[end] == TH_DIR_SEPARATOR)
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133 {
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134 save = path[end];
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135 path[end] = 0;
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136 break;
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137 }
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138
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139 // If the element is there, create it
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140 if (path[start] != 0)
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141 {
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142 th_stat_data sdata;
77d1af382e08 Improve th_stat_path() by changing flags into a struct and adding more information.
Matti Hamalainen <ccr@tnsp.org>
parents: 457
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143 BOOL exists = th_stat_path(path, &sdata);
77d1af382e08 Improve th_stat_path() by changing flags into a struct and adding more information.
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diff changeset
144 if (exists && (sdata.flags & TH_IS_DIR) == 0)
184
b256db93cf25 Initial import of th_file module.
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parents:
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145 goto error;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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146
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
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147 if (!exists)
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Matti Hamalainen <ccr@tnsp.org>
parents:
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148 {
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149 #ifdef TH_PLAT_WINDOWS
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150 if (!CreateDirectory(path, NULL))
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Matti Hamalainen <ccr@tnsp.org>
parents:
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151 goto error;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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152 #else
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153 if (mkdir(path, mode) < 0)
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Matti Hamalainen <ccr@tnsp.org>
parents:
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154 goto error;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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155 #endif
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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156 }
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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157 }
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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158
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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159 // Restore separator character and jump to next element
b256db93cf25 Initial import of th_file module.
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parents:
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160 path[end] = save;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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161 start = end + 1;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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162 } while (save != 0);
b256db93cf25 Initial import of th_file module.
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parents:
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163
457
85fa3d333556 Actually, revert the boolean changes .. meh.
Matti Hamalainen <ccr@tnsp.org>
parents: 454
diff changeset
164 res = TRUE;
184
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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165
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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166 error:
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
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167 th_free(path);
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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168 return res;
b256db93cf25 Initial import of th_file module.
Matti Hamalainen <ccr@tnsp.org>
parents:
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169 }