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- /***************************************************************************
- * _ _ ____ _
- * 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 <curl/mprintf.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 list[] = {
- { "CURL_HOME", NULL, FALSE },
- { "XDG_CONFIG_HOME", NULL, FALSE }, /* index == 1, used in the code */
- { "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 = curl_maprintf("%s" DIR_CHAR "%c%s", home, pref[i], &fname[1]);
- else
- c = curl_maprintf("%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;
- bool xdg = FALSE;
- DEBUGASSERT(fname && fname[0]);
- DEBUGASSERT((dotscore != 1) || (fname[0] == '.'));
- if(!fname[0])
- return NULL;
- for(i = 0; list[i].env; i++) {
- char *home = curl_getenv(list[i].env);
- if(home) {
- char *path;
- const char *filename = fname;
- if(i == 1 /* XDG_CONFIG_HOME */)
- xdg = TRUE;
- if(!home[0]) {
- curl_free(home);
- continue;
- }
- if(list[i].append) {
- char *c = curl_maprintf("%s%s", home, list[i].append);
- curl_free(home);
- if(!c)
- return NULL;
- home = c;
- }
- if(list[i].withoutdot) {
- if(!dotscore || xdg) {
- /* 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;
- }
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