1 //===- llvm/Support/Unix/Unix.h - Common Unix Include File -------*- C++ -*-===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defines things specific to Unix implementations. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_SYSTEM_UNIX_UNIX_H 15 #define LLVM_SYSTEM_UNIX_UNIX_H 16 17 //===----------------------------------------------------------------------===// 18 //=== WARNING: Implementation here must contain only generic UNIX code that 19 //=== is guaranteed to work on all UNIX variants. 20 //===----------------------------------------------------------------------===// 21 22 #include "llvm/Config/config.h" // Get autoconf configuration settings 23 #include "llvm/Support/Errno.h" 24 #include <algorithm> 25 #include <assert.h> 26 #include <cerrno> 27 #include <cstdio> 28 #include <cstdlib> 29 #include <cstring> 30 #include <string> 31 #include <sys/types.h> 32 33 #ifdef HAVE_UNISTD_H 34 #include <unistd.h> 35 #endif 36 37 #ifdef HAVE_SYS_PARAM_H 38 #include <sys/param.h> 39 #endif 40 41 #ifdef HAVE_SYS_TIME_H 42 # include <sys/time.h> 43 #endif 44 #include <time.h> 45 46 #ifdef HAVE_SYS_WAIT_H 47 # include <sys/wait.h> 48 #endif 49 50 #ifndef WEXITSTATUS 51 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8) 52 #endif 53 54 #ifndef WIFEXITED 55 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 56 #endif 57 58 /// This function builds an error message into \p ErrMsg using the \p prefix 59 /// string and the Unix error number given by \p errnum. If errnum is -1, the 60 /// default then the value of errno is used. 61 /// @brief Make an error message 62 /// 63 /// If the error number can be converted to a string, it will be 64 /// separated from prefix by ": ". 65 static inline bool MakeErrMsg( 66 std::string* ErrMsg, const std::string& prefix, int errnum = -1) { 67 if (!ErrMsg) 68 return true; 69 if (errnum == -1) 70 errnum = errno; 71 *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum); 72 return true; 73 } 74 75 #endif 76
