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
|
/* Copyright (C) 2019, 2020 C. McEnroe <june@causal.agency>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include "chat.h"
FILE *configOpen(const char *path, const char *mode) {
if (path[0] == '/' || path[0] == '.') goto local;
const char *home = getenv("HOME");
const char *configHome = getenv("XDG_CONFIG_HOME");
const char *configDirs = getenv("XDG_CONFIG_DIRS");
char buf[PATH_MAX];
if (configHome) {
snprintf(buf, sizeof(buf), "%s/" XDG_SUBDIR "/%s", configHome, path);
} else {
if (!home) goto local;
snprintf(buf, sizeof(buf), "%s/.config/" XDG_SUBDIR "/%s", home, path);
}
FILE *file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) {
warn("%s", buf);
return NULL;
}
if (!configDirs) configDirs = "/etc/xdg";
while (*configDirs) {
size_t len = strcspn(configDirs, ":");
snprintf(
buf, sizeof(buf), "%.*s/" XDG_SUBDIR "/%s",
(int)len, configDirs, path
);
file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) {
warn("%s", buf);
return NULL;
}
configDirs += len;
if (*configDirs) configDirs++;
}
local:
file = fopen(path, mode);
if (!file) warn("%s", path);
return file;
}
FILE *dataOpen(const char *path, const char *mode) {
if (path[0] == '/' || path[0] == '.') goto local;
const char *home = getenv("HOME");
const char *dataHome = getenv("XDG_DATA_HOME");
const char *dataDirs = getenv("XDG_DATA_DIRS");
char homePath[PATH_MAX];
if (dataHome) {
snprintf(
homePath, sizeof(homePath),
"%s/" XDG_SUBDIR "/%s", dataHome, path
);
} else {
if (!home) goto local;
snprintf(
homePath, sizeof(homePath),
"%s/.local/share/" XDG_SUBDIR "/%s", home, path
);
}
FILE *file = fopen(homePath, mode);
if (file) return file;
if (errno != ENOENT) {
warn("%s", homePath);
return NULL;
}
char buf[PATH_MAX];
if (!dataDirs) dataDirs = "/usr/local/share:/usr/share";
while (*dataDirs) {
size_t len = strcspn(dataDirs, ":");
snprintf(
buf, sizeof(buf), "%.*s/" XDG_SUBDIR "/%s",
(int)len, dataDirs, path
);
file = fopen(buf, mode);
if (file) return file;
if (errno != ENOENT) {
warn("%s", buf);
return NULL;
}
dataDirs += len;
if (*dataDirs) dataDirs++;
}
if (mode[0] != 'r') {
char *base = strrchr(homePath, '/');
*base = '\0';
int error = mkdir(homePath, S_IRWXU);
if (error && errno != EEXIST) {
warn("%s", homePath);
return NULL;
}
*base = '/';
file = fopen(homePath, mode);
if (!file) warn("%s", homePath);
return file;
}
local:
file = fopen(path, mode);
if (!file) warn("%s", path);
return file;
}
|