1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
|
/*
This file is not licenced under the GPL like the rest of the code.
Its is under the MIT license, to encourage reuse by cut-and-paste.
Copyright (c) 2007 Red Hat, Inc.
Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation files
(the "Software"), to deal in the Software without restriction,
including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Software,
and to permit persons to whom the Software is furnished to do so,
subject to the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
/**
* xdg_user_dir_lookup_with_fallback:
* @type: a string specifying the type of directory
* @fallback: value to use if the directory isn't specified by the user
* @returns: a newly allocated absolute pathname
*
* Looks up a XDG user directory of the specified type.
* Example of types are "DESKTOP" and "DOWNLOAD".
*
* In case the user hasn't specified any directory for the specified
* type the value returned is @fallback.
*
* The return value is newly allocated and must be freed with
* free(). The return value is never NULL if @fallback != NULL, unless
* out of memory.
**/
static char *
xdg_user_dir_lookup_with_fallback (const char *type, const char *fallback)
{
FILE *file;
char *home_dir, *config_home, *config_file;
char buffer[512];
char *user_dir;
char *p, *d;
int len;
int relative;
home_dir = getenv ("HOME");
if (home_dir == NULL)
goto error;
config_home = getenv ("XDG_CONFIG_HOME");
if (config_home == NULL || config_home[0] == 0)
{
config_file = (char*) malloc (strlen (home_dir) + strlen ("/.config/user-dirs.dirs") + 1);
if (config_file == NULL)
goto error;
strcpy (config_file, home_dir);
strcat (config_file, "/.config/user-dirs.dirs");
}
else
{
config_file = (char*) malloc (strlen (config_home) + strlen ("/user-dirs.dirs") + 1);
if (config_file == NULL)
goto error;
strcpy (config_file, config_home);
strcat (config_file, "/user-dirs.dirs");
}
file = fopen (config_file, "r");
free (config_file);
if (file == NULL)
goto error;
user_dir = NULL;
while (fgets (buffer, sizeof (buffer), file))
{
/* Remove newline at end */
len = strlen (buffer);
if (len > 0 && buffer[len-1] == '\n')
buffer[len-1] = 0;
p = buffer;
while (*p == ' ' || *p == '\t')
p++;
if (strncmp (p, "XDG_", 4) != 0)
continue;
p += 4;
if (strncmp (p, type, strlen (type)) != 0)
continue;
p += strlen (type);
if (strncmp (p, "_DIR", 4) != 0)
continue;
p += 4;
while (*p == ' ' || *p == '\t')
p++;
if (*p != '=')
continue;
p++;
while (*p == ' ' || *p == '\t')
p++;
if (*p != '"')
continue;
p++;
relative = 0;
if (strncmp (p, "$HOME/", 6) == 0)
{
p += 6;
relative = 1;
}
else if (*p != '/')
continue;
free (user_dir);
if (relative)
{
user_dir = (char*) malloc (strlen (home_dir) + 1 + strlen (p) + 1);
if (user_dir == NULL)
goto error2;
strcpy (user_dir, home_dir);
strcat (user_dir, "/");
}
else
{
user_dir = (char*) malloc (strlen (p) + 1);
if (user_dir == NULL)
goto error2;
*user_dir = 0;
}
d = user_dir + strlen (user_dir);
while (*p && *p != '"')
{
if ((*p == '\\') && (*(p+1) != 0))
p++;
*d++ = *p++;
}
*d = 0;
}
error2:
fclose (file);
if (user_dir)
return user_dir;
error:
if (fallback)
return strdup (fallback);
return NULL;
}
/**
* xdg_user_dir_lookup:
* @type: a string specifying the type of directory
* @returns: a newly allocated absolute pathname
*
* Looks up a XDG user directory of the specified type.
* Example of types are "DESKTOP" and "DOWNLOAD".
*
* The return value is always != NULL (unless out of memory),
* and if a directory
* for the type is not specified by the user the default
* is the home directory. Except for DESKTOP which defaults
* to ~/Desktop.
*
* The return value is newly allocated and must be freed with
* free().
**/
static char *
xdg_user_dir_lookup (const char *type)
{
char *dir, *home_dir, *user_dir;
dir = xdg_user_dir_lookup_with_fallback (type, NULL);
if (dir != NULL)
return dir;
home_dir = getenv ("HOME");
if (home_dir == NULL)
return strdup ("/tmp");
/* Special case desktop for historical compatibility */
if (strcmp (type, "DESKTOP") == 0)
{
user_dir = (char*) malloc (strlen (home_dir) + strlen ("/Desktop") + 1);
if (user_dir == NULL)
return NULL;
strcpy (user_dir, home_dir);
strcat (user_dir, "/Desktop");
return user_dir;
}
return strdup (home_dir);
}
#ifdef STANDALONE_XDG_USER_DIR_LOOKUP
int
main (int argc, char *argv[])
{
if (argc != 2)
{
fprintf (stderr, "Usage %s <dir-type>\n", argv[0]);
exit (1);
}
printf ("%s\n", xdg_user_dir_lookup (argv[1]));
return 0;
}
#endif
|
