#ifndef IGL_IS_WRITABLE_H #define IGL_IS_WRITABLE_H namespace igl { // Check if a file exists *and* is writable like PHP's is_writable function: // http://www.php.net/manual/en/function.is-writable.php // Input: // filename path to file // Returns true if file exists and is writable and false if file doesn't // exist or *is not writable* // // Note: Windows version will not test group and user id inline bool is_writable(const char * filename); } // Implementation #ifdef _WIN32 #include #ifndef S_IWUSR # define S_IWUSR S_IWRITE #endif inline bool is_writable(const char* filename) { // Check if file already exists struct stat status; if(stat(filename,&status)!=0) { return false; } return S_IWUSR & status.st_mode; } #else #include #include inline bool igl::is_writable(const char* filename) { // Check if file already exists struct stat status; if(stat(filename,&status)!=0) { return false; } // Get current users uid and gid uid_t this_uid = getuid(); gid_t this_gid = getgid(); // Dealing with owner if( this_uid == status.st_uid ) { return S_IWUSR & status.st_mode; } // Dealing with group member if( this_gid == status.st_gid ) { return S_IWGRP & status.st_mode; } // Dealing with other return S_IWOTH & status.st_mode; } #endif #endif