1 /*************************************************************************** 2 * _ _ ____ _ 3 * Project ___| | | | _ \| | 4 * / __| | | | |_) | | 5 * | (__| |_| | _ <| |___ 6 * \___|\___/|_| \_\_____| 7 * 8 * Copyright (C) 1998 - 2015, Daniel Stenberg, <daniel (at) 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 32 static 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 */ 63 char *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