/** * @file lldir_linux.cpp * @brief Implementation of directory utilities for linux * * $LicenseInfo:firstyear=2002&license=viewergpl$ * * Copyright (c) 2002-2007, Linden Research, Inc. * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 * ("GPL"), unless you have obtained a separate licensing agreement * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlife.com/developers/opensource/gplv2 * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at http://secondlife.com/developers/opensource/flossexception * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. * $/LicenseInfo$ */ #include "linden_common.h" #include "lldir_linux.h" #include "llerror.h" #include "llrand.h" #include #include #include #include #include static std::string getCurrentUserHome(char* fallback) { const uid_t uid = getuid(); struct passwd *pw; char *result_cstr = fallback; pw = getpwuid(uid); if ((pw != NULL) && (pw->pw_dir != NULL)) { result_cstr = (char*) pw->pw_dir; } else { llinfos << "Couldn't detect home directory from passwd - trying $HOME" << llendl; const char *const home_env = getenv("HOME"); /* Flawfinder: ignore */ if (home_env) { result_cstr = (char*) home_env; } else { llwarns << "Couldn't detect home directory! Falling back to " << fallback << llendl; } } return std::string(result_cstr); } LLDir_Linux::LLDir_Linux() { mDirDelimiter = "/"; mCurrentDirIndex = -1; mCurrentDirCount = -1; mDirp = NULL; char tmp_str[LL_MAX_PATH]; /* Flawfinder: ignore */ if (getcwd(tmp_str, LL_MAX_PATH) == NULL) { strcpy(tmp_str, "/tmp"); llwarns << "Could not get current directory; changing to " << tmp_str << llendl; if (chdir(tmp_str) == -1) { llerrs << "Could not change directory to " << tmp_str << llendl; } } mExecutableFilename = ""; mExecutablePathAndName = ""; mExecutableDir = tmp_str; mWorkingDir = tmp_str; #ifdef APP_RO_DATA_DIR mAppRODataDir = APP_RO_DATA_DIR; #else mAppRODataDir = tmp_str; #endif mOSUserDir = getCurrentUserHome(tmp_str); mOSUserAppDir = ""; mLindenUserDir = tmp_str; char path [32]; /* Flawfinder: ignore */ // *NOTE: /proc/%d/exe doesn't work on FreeBSD. But that's ok, // because this is the linux implementation. snprintf (path, sizeof(path), "/proc/%d/exe", (int) getpid ()); int rc = readlink (path, tmp_str, sizeof (tmp_str)-1); /* Flawfinder: ignore */ if ( (rc != -1) && (rc <= ((int) sizeof (tmp_str)-1)) ) { tmp_str[rc] = '\0'; //readlink() doesn't 0-terminate the buffer mExecutablePathAndName = tmp_str; char *path_end; if ((path_end = strrchr(tmp_str,'/'))) { *path_end = '\0'; mExecutableDir = tmp_str; mWorkingDir = tmp_str; mExecutableFilename = path_end+1; } else { mExecutableFilename = tmp_str; } } // *TODO: don't use /tmp, use $HOME/.secondlife/tmp or something. mTempDir = "/tmp"; } LLDir_Linux::~LLDir_Linux() { } // Implementation void LLDir_Linux::initAppDirs(const std::string &app_name) { mAppName = app_name; std::string upper_app_name(app_name); LLStringUtil::toUpper(upper_app_name); char* app_home_env = getenv((upper_app_name + "_USER_DIR").c_str()); /* Flawfinder: ignore */ if (app_home_env) { // user has specified own userappdir i.e. $SECONDLIFE_USER_DIR mOSUserAppDir = app_home_env; } else { // traditionally on unixoids, MyApp gets ~/.myapp dir for data mOSUserAppDir = mOSUserDir; mOSUserAppDir += "/"; mOSUserAppDir += "."; std::string lower_app_name(app_name); LLStringUtil::toLower(lower_app_name); mOSUserAppDir += lower_app_name; } // create any directories we expect to write to. int res = LLFile::mkdir(mOSUserAppDir); if (res == -1) { if (errno != EEXIST) { llwarns << "Couldn't create app user dir " << mOSUserAppDir << llendl; llwarns << "Default to base dir" << mOSUserDir << llendl; mOSUserAppDir = mOSUserDir; } } res = LLFile::mkdir(getExpandedFilename(LL_PATH_LOGS,"")); if (res == -1) { if (errno != EEXIST) { llwarns << "Couldn't create LL_PATH_LOGS dir " << getExpandedFilename(LL_PATH_LOGS,"") << llendl; } } res = LLFile::mkdir(getExpandedFilename(LL_PATH_USER_SETTINGS,"")); if (res == -1) { if (errno != EEXIST) { llwarns << "Couldn't create LL_PATH_USER_SETTINGS dir " << getExpandedFilename(LL_PATH_USER_SETTINGS,"") << llendl; } } res = LLFile::mkdir(getExpandedFilename(LL_PATH_CACHE,"")); if (res == -1) { if (errno != EEXIST) { llwarns << "Couldn't create LL_PATH_CACHE dir " << getExpandedFilename(LL_PATH_CACHE,"") << llendl; } } res = LLFile::mkdir(getExpandedFilename(LL_PATH_MOZILLA_PROFILE,"")); if (res == -1) { if (errno != EEXIST) { llwarns << "Couldn't create LL_PATH_MOZILLA_PROFILE dir " << getExpandedFilename(LL_PATH_MOZILLA_PROFILE,"") << llendl; } } mCAFile = getExpandedFilename(LL_PATH_APP_SETTINGS, "CA.pem"); } U32 LLDir_Linux::countFilesInDir(const std::string &dirname, const std::string &mask) { U32 file_count = 0; glob_t g; std::string tmp_str; tmp_str = dirname; tmp_str += mask; if(glob(tmp_str.c_str(), GLOB_NOSORT, NULL, &g) == 0) { file_count = g.gl_pathc; globfree(&g); } return (file_count); } // get the next file in the directory // automatically wrap if we've hit the end BOOL LLDir_Linux::getNextFileInDir(const std::string &dirname, const std::string &mask, std::string &fname, BOOL wrap) { glob_t g; BOOL result = FALSE; fname = ""; if(!(dirname == mCurrentDir)) { // different dir specified, close old search mCurrentDirIndex = -1; mCurrentDirCount = -1; mCurrentDir = dirname; } std::string tmp_str; tmp_str = dirname; tmp_str += mask; if(glob(tmp_str.c_str(), GLOB_NOSORT, NULL, &g) == 0) { if(g.gl_pathc > 0) { if((int)g.gl_pathc != mCurrentDirCount) { // Number of matches has changed since the last search, meaning a file has been added or deleted. // Reset the index. mCurrentDirIndex = -1; mCurrentDirCount = g.gl_pathc; } mCurrentDirIndex++; if((mCurrentDirIndex >= (int)g.gl_pathc) && wrap) { mCurrentDirIndex = 0; } if(mCurrentDirIndex < (int)g.gl_pathc) { // llinfos << "getNextFileInDir: returning number " << mCurrentDirIndex << ", path is " << g.gl_pathv[mCurrentDirIndex] << llendl; // The API wants just the filename, not the full path. //fname = g.gl_pathv[mCurrentDirIndex]; char *s = strrchr(g.gl_pathv[mCurrentDirIndex], '/'); if(s == NULL) s = g.gl_pathv[mCurrentDirIndex]; else if(s[0] == '/') s++; fname = s; result = TRUE; } } globfree(&g); } return(result); } // get a random file in the directory // automatically wrap if we've hit the end void LLDir_Linux::getRandomFileInDir(const std::string &dirname, const std::string &mask, std::string &fname) { S32 num_files; S32 which_file; DIR *dirp; dirent *entryp = NULL; fname = ""; num_files = countFilesInDir(dirname,mask); if (!num_files) { return; } which_file = ll_rand(num_files); // llinfos << "Random select file #" << which_file << llendl; // which_file now indicates the (zero-based) index to which file to play if (!((dirp = opendir(dirname.c_str())))) { while (which_file--) { if (!((entryp = readdir(dirp)))) { return; } } if ((!which_file) && entryp) { fname = entryp->d_name; } closedir(dirp); } } std::string LLDir_Linux::getCurPath() { char tmp_str[LL_MAX_PATH]; /* Flawfinder: ignore */ if (getcwd(tmp_str, LL_MAX_PATH) == NULL) { llwarns << "Could not get current directory" << llendl; tmp_str[0] = '\0'; } return tmp_str; } BOOL LLDir_Linux::fileExists(const std::string &filename) { struct stat stat_data; // Check the age of the file // Now, we see if the files we've gathered are recent... int res = stat(filename.c_str(), &stat_data); if (!res) { return TRUE; } else { return FALSE; } }