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/* |
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This file is not licenced under the GPL like the rest of the code. |
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Its is under the MIT license, to encourage reuse by cut-and-paste. |
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Copyright (c) 2007 Red Hat, Inc. |
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Permission is hereby granted, free of charge, to any person |
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obtaining a copy of this software and associated documentation files |
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(the "Software"), to deal in the Software without restriction, |
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including without limitation the rights to use, copy, modify, merge, |
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publish, distribute, sublicense, and/or sell copies of the Software, |
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and to permit persons to whom the Software is furnished to do so, |
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subject to the following conditions: |
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The above copyright notice and this permission notice shall be |
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included in all copies or substantial portions of the Software. |
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
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BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
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ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
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SOFTWARE. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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/** |
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* xdg_user_dir_lookup_with_fallback: |
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* @type: a string specifying the type of directory |
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* @fallback: value to use if the directory isn't specified by the user |
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* @returns: a newly allocated absolute pathname |
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* |
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* Looks up a XDG user directory of the specified type. |
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* Example of types are "DESKTOP" and "DOWNLOAD". |
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* |
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* In case the user hasn't specified any directory for the specified |
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* type the value returned is @fallback. |
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* |
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* The return value is newly allocated and must be freed with |
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* free(). The return value is never NULL if @fallback != NULL, unless |
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* out of memory. |
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**/ |
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char * |
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xdg_user_dir_lookup_with_fallback (const char *type, const char *fallback) |
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{ |
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FILE *file; |
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char *home_dir, *config_home, *config_file; |
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char buffer[512]; |
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char *user_dir; |
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char *p, *d; |
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int len; |
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int relative; |
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home_dir = getenv ("HOME"); |
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if (home_dir == NULL) |
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goto error; |
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config_home = getenv ("XDG_CONFIG_HOME"); |
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if (config_home == NULL || config_home[0] == 0) |
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{ |
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config_file = (char*) malloc (strlen (home_dir) + strlen ("/.config/user-dirs.dirs") + 1); |
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if (config_file == NULL) |
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goto error; |
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strcpy (config_file, home_dir); |
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strcat (config_file, "/.config/user-dirs.dirs"); |
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} |
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else |
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{ |
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config_file = (char*) malloc (strlen (config_home) + strlen ("/user-dirs.dirs") + 1); |
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if (config_file == NULL) |
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goto error; |
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strcpy (config_file, config_home); |
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strcat (config_file, "/user-dirs.dirs"); |
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} |
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file = fopen (config_file, "r"); |
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free (config_file); |
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if (file == NULL) |
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goto error; |
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user_dir = NULL; |
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while (fgets (buffer, sizeof (buffer), file)) |
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{ |
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/* Remove newline at end */ |
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len = strlen (buffer); |
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if (len > 0 && buffer[len-1] == '\n') |
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buffer[len-1] = 0; |
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p = buffer; |
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while (*p == ' ' || *p == '\t') |
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p++; |
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if (strncmp (p, "XDG_", 4) != 0) |
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continue; |
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p += 4; |
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if (strncmp (p, type, strlen (type)) != 0) |
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continue; |
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p += strlen (type); |
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if (strncmp (p, "_DIR", 4) != 0) |
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continue; |
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p += 4; |
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while (*p == ' ' || *p == '\t') |
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p++; |
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if (*p != '=') |
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continue; |
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p++; |
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while (*p == ' ' || *p == '\t') |
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p++; |
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if (*p != '"') |
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continue; |
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p++; |
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relative = 0; |
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if (strncmp (p, "$HOME/", 6) == 0) |
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{ |
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p += 6; |
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relative = 1; |
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} |
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else if (*p != '/') |
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continue; |
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if (relative) |
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{ |
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user_dir = (char*) malloc (strlen (home_dir) + 1 + strlen (p) + 1); |
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if (user_dir == NULL) |
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goto error2; |
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strcpy (user_dir, home_dir); |
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strcat (user_dir, "/"); |
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} |
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else |
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{ |
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user_dir = (char*) malloc (strlen (p) + 1); |
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if (user_dir == NULL) |
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goto error2; |
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*user_dir = 0; |
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} |
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d = user_dir + strlen (user_dir); |
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while (*p && *p != '"') |
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{ |
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if ((*p == '\\') && (*(p+1) != 0)) |
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p++; |
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*d++ = *p++; |
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} |
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*d = 0; |
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} |
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error2: |
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fclose (file); |
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if (user_dir) |
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return user_dir; |
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error: |
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if (fallback) |
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return strdup (fallback); |
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return NULL; |
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} |
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/** |
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* xdg_user_dir_lookup: |
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* @type: a string specifying the type of directory |
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* @returns: a newly allocated absolute pathname |
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* |
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* Looks up a XDG user directory of the specified type. |
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* Example of types are "DESKTOP" and "DOWNLOAD". |
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* |
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* The return value is always != NULL (unless out of memory), |
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* and if a directory |
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* for the type is not specified by the user the default |
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* is the home directory. Except for DESKTOP which defaults |
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* to ~/Desktop. |
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* |
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* The return value is newly allocated and must be freed with |
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* free(). |
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**/ |
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char * |
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xdg_user_dir_lookup (const char *type) |
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{ |
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char *dir, *home_dir, *user_dir; |
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dir = xdg_user_dir_lookup_with_fallback (type, NULL); |
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if (dir != NULL) |
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return dir; |
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home_dir = getenv ("HOME"); |
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if (home_dir == NULL) |
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return strdup ("/tmp"); |
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/* Special case desktop for historical compatibility */ |
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if (strcmp (type, "DESKTOP") == 0) |
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{ |
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user_dir = (char*) malloc (strlen (home_dir) + strlen ("/Desktop") + 1); |
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if (user_dir == NULL) |
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return NULL; |
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strcpy (user_dir, home_dir); |
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strcat (user_dir, "/Desktop"); |
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return user_dir; |
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} |
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return strdup (home_dir); |
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} |
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/* vim: set ts=8 : */ |