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_LIB_SUPPORT_UNIX_UNIX_H
15 #define LLVM_LIB_SUPPORT_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 #include <sys/wait.h>
33 
34 #ifdef HAVE_UNISTD_H
35 #include <unistd.h>
36 #endif
37 
38 #ifdef HAVE_SYS_PARAM_H
39 #include <sys/param.h>
40 #endif
41 
42 #ifdef HAVE_SYS_TIME_H
43 # include <sys/time.h>
44 #endif
45 #include <time.h>
46 
47 #ifdef HAVE_DLFCN_H
48 # include <dlfcn.h>
49 #endif
50 
51 #ifdef HAVE_FCNTL_H
52 # include <fcntl.h>
53 #endif
54 
55 /// This function builds an error message into \p ErrMsg using the \p prefix
56 /// string and the Unix error number given by \p errnum. If errnum is -1, the
57 /// default then the value of errno is used.
58 /// @brief Make an error message
59 ///
60 /// If the error number can be converted to a string, it will be
61 /// separated from prefix by ": ".
62 static inline bool MakeErrMsg(
63   std::string* ErrMsg, const std::string& prefix, int errnum = -1) {
64   if (!ErrMsg)
65     return true;
66   if (errnum == -1)
67     errnum = errno;
68   *ErrMsg = prefix + ": " + llvm::sys::StrError(errnum);
69   return true;
70 }
71 
72 #endif
73