1 //===-- FileSystem.cpp ------------------------------------------*- 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 #include "lldb/Host/FileSystem.h"
11 
12 // C includes
13 #include <dirent.h>
14 #include <sys/mount.h>
15 #include <sys/param.h>
16 #include <sys/stat.h>
17 #include <sys/types.h>
18 #ifdef __linux__
19 #include <linux/magic.h>
20 #include <sys/mount.h>
21 #include <sys/statfs.h>
22 #endif
23 #if defined(__NetBSD__)
24 #include <sys/statvfs.h>
25 #endif
26 
27 // lldb Includes
28 #include "lldb/Host/Host.h"
29 #include "lldb/Utility/Status.h"
30 #include "lldb/Utility/StreamString.h"
31 
32 #include "llvm/Support/FileSystem.h"
33 
34 using namespace lldb;
35 using namespace lldb_private;
36 
37 const char *FileSystem::DEV_NULL = "/dev/null";
38 
39 Status FileSystem::Symlink(const FileSpec &src, const FileSpec &dst) {
40   Status error;
41   if (::symlink(dst.GetCString(), src.GetCString()) == -1)
42     error.SetErrorToErrno();
43   return error;
44 }
45 
46 Status FileSystem::Readlink(const FileSpec &src, FileSpec &dst) {
47   Status error;
48   char buf[PATH_MAX];
49   ssize_t count = ::readlink(src.GetCString(), buf, sizeof(buf) - 1);
50   if (count < 0)
51     error.SetErrorToErrno();
52   else {
53     buf[count] = '\0'; // Success
54     dst.SetFile(buf, false);
55   }
56   return error;
57 }
58 
59 Status FileSystem::ResolveSymbolicLink(const FileSpec &src, FileSpec &dst) {
60   char resolved_path[PATH_MAX];
61   if (!src.GetPath(resolved_path, sizeof(resolved_path))) {
62     return Status("Couldn't get the canonical path for %s", src.GetCString());
63   }
64 
65   char real_path[PATH_MAX + 1];
66   if (realpath(resolved_path, real_path) == nullptr) {
67     Status err;
68     err.SetErrorToErrno();
69     return err;
70   }
71 
72   dst = FileSpec(real_path, false);
73 
74   return Status();
75 }
76 
77 FILE *FileSystem::Fopen(const char *path, const char *mode) {
78   return ::fopen(path, mode);
79 }
80