xf.li | 6c8fc1e | 2023-08-12 00:11:09 -0700 | [diff] [blame^] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 1998 - 2022, 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.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 | * SPDX-License-Identifier: curl |
| 22 | * |
| 23 | ***************************************************************************/ |
| 24 | #include "tool_setup.h" |
| 25 | |
| 26 | #ifdef HAVE_PWD_H |
| 27 | # undef __NO_NET_API /* required for building for AmigaOS */ |
| 28 | # include <pwd.h> |
| 29 | #endif |
| 30 | |
| 31 | #ifdef HAVE_SYS_STAT_H |
| 32 | #include <sys/stat.h> |
| 33 | #endif |
| 34 | #ifdef HAVE_FCNTL_H |
| 35 | #include <fcntl.h> |
| 36 | #endif |
| 37 | |
| 38 | #include <curl/mprintf.h> |
| 39 | |
| 40 | #include "tool_findfile.h" |
| 41 | |
| 42 | #include "memdebug.h" /* keep this as LAST include */ |
| 43 | |
| 44 | struct finder { |
| 45 | const char *env; |
| 46 | const char *append; |
| 47 | bool withoutdot; |
| 48 | }; |
| 49 | |
| 50 | /* The order of the variables below is important, as the index number is used |
| 51 | in the findfile() function */ |
| 52 | static const struct finder list[] = { |
| 53 | { "CURL_HOME", NULL, FALSE }, |
| 54 | { "XDG_CONFIG_HOME", NULL, FALSE }, /* index == 1, used in the code */ |
| 55 | { "HOME", NULL, FALSE }, |
| 56 | #ifdef WIN32 |
| 57 | { "USERPROFILE", NULL, FALSE }, |
| 58 | { "APPDATA", NULL, FALSE }, |
| 59 | { "USERPROFILE", "\\Application Data", FALSE}, |
| 60 | #endif |
| 61 | /* these are for .curlrc if XDG_CONFIG_HOME is not defined */ |
| 62 | { "CURL_HOME", "/.config", TRUE }, |
| 63 | { "HOME", "/.config", TRUE }, |
| 64 | |
| 65 | { NULL, NULL, FALSE } |
| 66 | }; |
| 67 | |
| 68 | static char *checkhome(const char *home, const char *fname, bool dotscore) |
| 69 | { |
| 70 | const char pref[2] = { '.', '_' }; |
| 71 | int i; |
| 72 | for(i = 0; i < (dotscore ? 2 : 1); i++) { |
| 73 | char *c; |
| 74 | if(dotscore) |
| 75 | c = curl_maprintf("%s" DIR_CHAR "%c%s", home, pref[i], &fname[1]); |
| 76 | else |
| 77 | c = curl_maprintf("%s" DIR_CHAR "%s", home, fname); |
| 78 | if(c) { |
| 79 | int fd = open(c, O_RDONLY); |
| 80 | if(fd >= 0) { |
| 81 | char *path = strdup(c); |
| 82 | close(fd); |
| 83 | curl_free(c); |
| 84 | return path; |
| 85 | } |
| 86 | curl_free(c); |
| 87 | } |
| 88 | } |
| 89 | return NULL; |
| 90 | } |
| 91 | |
| 92 | /* |
| 93 | * findfile() - return the full path name of the file. |
| 94 | * |
| 95 | * If 'dotscore' is TRUE, then check for the file first with a leading dot |
| 96 | * and then with a leading underscore. |
| 97 | * |
| 98 | * 1. Iterate over the environment variables in order, and if set, check for |
| 99 | * the given file to be accessed there, then it is a match. |
| 100 | * 2. Non-windows: try getpwuid |
| 101 | */ |
| 102 | char *findfile(const char *fname, int dotscore) |
| 103 | { |
| 104 | int i; |
| 105 | bool xdg = FALSE; |
| 106 | DEBUGASSERT(fname && fname[0]); |
| 107 | DEBUGASSERT((dotscore != 1) || (fname[0] == '.')); |
| 108 | |
| 109 | if(!fname[0]) |
| 110 | return NULL; |
| 111 | |
| 112 | for(i = 0; list[i].env; i++) { |
| 113 | char *home = curl_getenv(list[i].env); |
| 114 | if(home) { |
| 115 | char *path; |
| 116 | const char *filename = fname; |
| 117 | if(i == 1 /* XDG_CONFIG_HOME */) |
| 118 | xdg = TRUE; |
| 119 | if(!home[0]) { |
| 120 | curl_free(home); |
| 121 | continue; |
| 122 | } |
| 123 | if(list[i].append) { |
| 124 | char *c = curl_maprintf("%s%s", home, list[i].append); |
| 125 | curl_free(home); |
| 126 | if(!c) |
| 127 | return NULL; |
| 128 | home = c; |
| 129 | } |
| 130 | if(list[i].withoutdot) { |
| 131 | if(!dotscore || xdg) { |
| 132 | /* this is not looking for .curlrc, or the XDG_CONFIG_HOME was |
| 133 | defined so we skip the extended check */ |
| 134 | curl_free(home); |
| 135 | continue; |
| 136 | } |
| 137 | filename++; /* move past the leading dot */ |
| 138 | dotscore = 0; /* disable it for this check */ |
| 139 | } |
| 140 | path = checkhome(home, filename, dotscore ? dotscore - 1 : 0); |
| 141 | curl_free(home); |
| 142 | if(path) |
| 143 | return path; |
| 144 | } |
| 145 | } |
| 146 | #if defined(HAVE_GETPWUID) && defined(HAVE_GETEUID) |
| 147 | { |
| 148 | struct passwd *pw = getpwuid(geteuid()); |
| 149 | if(pw) { |
| 150 | char *home = pw->pw_dir; |
| 151 | if(home && home[0]) |
| 152 | return checkhome(home, fname, FALSE); |
| 153 | } |
| 154 | } |
| 155 | #endif /* PWD-stuff */ |
| 156 | return NULL; |
| 157 | } |