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 <cerrno> 26 #include <cstdio> 27 #include <cstdlib> 28 #include <cstring> 29 #include <string> 30 31 #ifdef HAVE_UNISTD_H 32 #include <unistd.h> 33 #endif 34 35 #ifdef HAVE_SYS_TYPES_H 36 #include <sys/types.h> 37 #endif 38 39 #ifdef HAVE_SYS_PARAM_H 40 #include <sys/param.h> 41 #endif 42 43 #ifdef HAVE_ASSERT_H 44 #include <assert.h> 45 #endif 46 47 #ifdef HAVE_SYS_TIME_H 48 # include <sys/time.h> 49 #endif 50 #include <time.h> 51 52 #ifdef HAVE_SYS_WAIT_H 53 # include <sys/wait.h> 54 #endif 55 56 #ifndef WEXITSTATUS 57 # define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8) 58 #endif 59 60 #ifndef WIFEXITED 61 # define WIFEXITED(stat_val) (((stat_val) & 255) == 0) 62 #endif 63 64 /// This function builds an error message into \p ErrMsg using the \p prefix 65 /// string and the Unix error number given by \p errnum. If errnum is -1, the 66 /// default then the value of errno is used. 67 /// @brief Make an error message 68 /// 69 /// If the error number can be converted to a string, it will be 70 /// separated from prefix by ": ". 71 static inline bool MakeErrMsg( 72 std::string* ErrMsg, const std::string& prefix, int errnum = -1) { 73 if (!ErrMsg) 74 return true; 75 if (errnum == -1) 76 errnum = errno; 77 *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum); 78 return true; 79 } 80 81 #endif 82
