1/***************************************************************************
2 *                                  _   _ ____  _
3 *  Project                     ___| | | |  _ \| |
4 *                             / __| | | | |_) | |
5 *                            | (__| |_| |  _ <| |___
6 *                             \___|\___/|_| \_\_____|
7 *
8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel@haxx.se>, et al.
9 *
10 * This software is licensed as described in the file COPYING, which
11 * you should have received as part of this distribution. The terms
12 * are also available at https://curl.haxx.se/docs/copyright.html.
13 *
14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
15 * copies of the Software, and permit persons to whom the Software is
16 * furnished to do so, under the terms of the COPYING file.
17 *
18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
19 * KIND, either express or implied.
20 *
21 ***************************************************************************/
22#include "tool_setup.h"
23
24#ifdef HAVE_PWD_H
25#  include <pwd.h>
26#endif
27
28#include "tool_homedir.h"
29
30#include "memdebug.h" /* keep this as LAST include */
31
32static char *GetEnv(const char *variable, char do_expand)
33{
34  char *env = NULL;
35#ifdef WIN32
36  char  buf1[1024], buf2[1024];
37  DWORD rc;
38
39  /* Don't use getenv(); it doesn't find variable added after program was
40   * started. Don't accept truncated results (i.e. rc >= sizeof(buf1)).  */
41
42  rc = GetEnvironmentVariable(variable, buf1, sizeof(buf1));
43  if(rc > 0 && rc < sizeof(buf1)) {
44    env = buf1;
45    variable = buf1;
46  }
47  if(do_expand && strchr(variable, '%')) {
48    /* buf2 == variable if not expanded */
49    rc = ExpandEnvironmentStrings (variable, buf2, sizeof(buf2));
50    if(rc > 0 && rc < sizeof(buf2) &&
51       !strchr(buf2, '%'))    /* no vars still unexpanded */
52      env = buf2;
53  }
54#else
55  (void)do_expand;
56  /* no length control */
57  env = getenv(variable);
58#endif
59  return (env && env[0]) ? strdup(env) : NULL;
60}
61
62/* return the home directory of the current user as an allocated string */
63char *homedir(void)
64{
65  char *home;
66
67  home = GetEnv("CURL_HOME", FALSE);
68  if(home)
69    return home;
70
71  home = GetEnv("HOME", FALSE);
72  if(home)
73    return home;
74
75#if defined(HAVE_GETPWUID) && defined(HAVE_GETEUID)
76 {
77   struct passwd *pw = getpwuid(geteuid());
78
79   if(pw) {
80     home = pw->pw_dir;
81     if(home && home[0])
82       home = strdup(home);
83     else
84       home = NULL;
85   }
86 }
87#endif /* PWD-stuff */
88#ifdef WIN32
89  home = GetEnv("APPDATA", TRUE);
90  if(!home)
91    home = GetEnv("%USERPROFILE%\\Application Data", TRUE); /* Normally only
92                                                               on Win-2K/XP */
93#endif /* WIN32 */
94  return home;
95}
96