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
|
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) Daniel Stenberg, <daniel@haxx.se>, et al.
*
* This software is licensed as described in the file COPYING, which
* you should have received as part of this distribution. The terms
* are also available at https://curl.se/docs/copyright.html.
*
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
* copies of the Software, and permit persons to whom the Software is
* furnished to do so, under the terms of the COPYING file.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "tool_setup.h"
#ifdef HAVE_PWD_H
# undef __NO_NET_API /* required for building for AmigaOS */
# include <pwd.h>
#endif
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#ifdef HAVE_FCNTL_H
#include <fcntl.h>
#endif
#include <curlx.h>
#include "tool_findfile.h"
#include "memdebug.h" /* keep this as LAST include */
struct finder {
const char *env;
const char *append;
bool withoutdot;
};
/* The order of the variables below is important, as the index number is used
in the findfile() function */
static const struct finder conf_list[] = {
{ "CURL_HOME", NULL, FALSE },
{ "XDG_CONFIG_HOME", NULL, TRUE },
{ "HOME", NULL, FALSE },
#ifdef _WIN32
{ "USERPROFILE", NULL, FALSE },
{ "APPDATA", NULL, FALSE },
{ "USERPROFILE", "\\Application Data", FALSE},
#endif
/* these are for .curlrc if XDG_CONFIG_HOME is not defined */
{ "CURL_HOME", "/.config", TRUE },
{ "HOME", "/.config", TRUE },
{ NULL, NULL, FALSE }
};
static char *checkhome(const char *home, const char *fname, bool dotscore)
{
const char pref[2] = { '.', '_' };
int i;
for(i = 0; i < (dotscore ? 2 : 1); i++) {
char *c;
if(dotscore)
c = aprintf("%s" DIR_CHAR "%c%s", home, pref[i], &fname[1]);
else
c = aprintf("%s" DIR_CHAR "%s", home, fname);
if(c) {
int fd = open(c, O_RDONLY);
if(fd >= 0) {
char *path = strdup(c);
close(fd);
curl_free(c);
return path;
}
curl_free(c);
}
}
return NULL;
}
/*
* findfile() - return the full path name of the file.
*
* If 'dotscore' is TRUE, then check for the file first with a leading dot
* and then with a leading underscore.
*
* 1. Iterate over the environment variables in order, and if set, check for
* the given file to be accessed there, then it is a match.
* 2. Non-Windows: try getpwuid
*/
char *findfile(const char *fname, int dotscore)
{
int i;
DEBUGASSERT(fname && fname[0]);
DEBUGASSERT((dotscore != 1) || (fname[0] == '.'));
if(!fname[0])
return NULL;
for(i = 0; conf_list[i].env; i++) {
char *home = curl_getenv(conf_list[i].env);
if(home) {
char *path;
const char *filename = fname;
if(!home[0]) {
curl_free(home);
continue;
}
if(conf_list[i].append) {
char *c = aprintf("%s%s", home, conf_list[i].append);
curl_free(home);
if(!c)
return NULL;
home = c;
}
if(conf_list[i].withoutdot) {
if(!dotscore) {
/* this is not looking for .curlrc, or the XDG_CONFIG_HOME was
defined so we skip the extended check */
curl_free(home);
continue;
}
filename++; /* move past the leading dot */
dotscore = 0; /* disable it for this check */
}
path = checkhome(home, filename, dotscore ? dotscore - 1 : 0);
curl_free(home);
if(path)
return path;
}
}
#if defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
{
struct passwd *pw = getpwuid(geteuid());
if(pw) {
char *home = pw->pw_dir;
if(home && home[0])
return checkhome(home, fname, FALSE);
}
}
#endif /* PWD-stuff */
return NULL;
}
|
