1/* 2* Copyright (c) 2015, The Linux Foundation. All rights reserved. 3* 4* Redistribution and use in source and binary forms, with or without modification, are permitted 5* provided that the following conditions are met: 6* * Redistributions of source code must retain the above copyright notice, this list of 7* conditions and the following disclaimer. 8* * Redistributions in binary form must reproduce the above copyright notice, this list of 9* conditions and the following disclaimer in the documentation and/or other materials provided 10* with the distribution. 11* * Neither the name of The Linux Foundation nor the names of its contributors may be used to 12* endorse or promote products derived from this software without specific prior written 13* permission. 14* 15* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 16* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 17* NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE 18* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 19* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 20* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 21* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 22* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23*/ 24 25#ifndef __SYS_H__ 26#define __SYS_H__ 27 28#include <sys/eventfd.h> 29#include <dlfcn.h> 30#include <unistd.h> 31#include <stdio.h> 32#include <stdlib.h> 33#include <poll.h> 34#include <pthread.h> 35#include <fstream> 36 37#ifdef SDM_VIRTUAL_DRIVER 38#include <virtual_driver.h> 39#endif 40 41namespace sdm { 42 43class Sys { 44 public: 45#ifndef SDM_VIRTUAL_DRIVER 46 typedef std::fstream fstream; 47#else 48 typedef VirtualFStream fstream; 49#endif 50 51 // Pointers to system calls which are either mapped to actual system call or virtual driver. 52 typedef int (*ioctl)(int, int, ...); 53 typedef int (*open)(const char *, int, ...); 54 typedef int (*close)(int); 55 typedef int (*poll)(struct pollfd *, nfds_t, int); 56 typedef ssize_t (*pread)(int, void *, size_t, off_t); 57 typedef ssize_t (*pwrite)(int, const void *, size_t, off_t); 58 typedef int (*pthread_cancel)(pthread_t thread); 59 typedef int (*dup)(int fd); 60 typedef ssize_t (*read)(int, void *, size_t); 61 typedef ssize_t (*write)(int, const void *, size_t); 62 typedef int (*eventfd)(unsigned int, int); 63 64 static bool getline_(fstream &fs, std::string &line); // NOLINT 65 66 static ioctl ioctl_; 67 static open open_; 68 static close close_; 69 static poll poll_; 70 static pread pread_; 71 static pwrite pwrite_; 72 static pthread_cancel pthread_cancel_; 73 static dup dup_; 74 static read read_; 75 static write write_; 76 static eventfd eventfd_; 77}; 78 79class DynLib { 80 public: 81 ~DynLib(); 82 bool Open(const char *lib_name); 83 bool Sym(const char *func_name, void **func_ptr); 84 const char * Error() { return ::dlerror(); } 85 operator bool() const { return lib_ != NULL; } 86 87 private: 88 void Close(); 89 90 void *lib_ = NULL; 91}; 92 93} // namespace sdm 94 95#endif // __SYS_H__ 96