1 files changed, 0 insertions, 736 deletions
diff --git a/test/util/fs_util.cc b/test/util/fs_util.cc
deleted file mode 100644
index 1c24d9ffc..000000000
--- a/test/util/fs_util.cc
+++ /dev/null
@@ -1,736 +0,0 @@
-// Copyright 2018 The gVisor Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "test/util/fs_util.h"
-
-#include <dirent.h>
-#ifdef __linux__
-#include <linux/magic.h>
-#endif  // __linux__
-#include <sys/stat.h>
-#include <sys/statfs.h>
-#include <sys/types.h>
-#include <unistd.h>
-
-#include "gmock/gmock.h"
-#include "absl/strings/match.h"
-#include "absl/strings/str_cat.h"
-#include "absl/strings/str_split.h"
-#include "absl/strings/string_view.h"
-#include "absl/time/clock.h"
-#include "absl/time/time.h"
-#include "test/util/cleanup.h"
-#include "test/util/file_descriptor.h"
-#include "test/util/posix_error.h"
-
-namespace gvisor {
-namespace testing {
-
-namespace {
-PosixError WriteContentsToFD(int fd, absl::string_view contents) {
-  int written = 0;
-  while (static_cast<absl::string_view::size_type>(written) < contents.size()) {
-    int wrote = write(fd, contents.data() + written, contents.size() - written);
-    if (wrote < 0) {
-      if (errno == EINTR) {
-        continue;
-      }
-      return PosixError(
-          errno, absl::StrCat("WriteContentsToFD fd: ", fd, " write failure."));
-    }
-    written += wrote;
-  }
-  return NoError();
-}
-}  // namespace
-
-namespace internal {
-
-// Given a collection of file paths, append them all together,
-// ensuring that the proper path separators are inserted between them.
-std::string JoinPathImpl(std::initializer_list<absl::string_view> paths) {
-  std::string result;
-
-  if (paths.size() != 0) {
-    // This size calculation is worst-case: it assumes one extra "/" for every
-    // path other than the first.
-    size_t total_size = paths.size() - 1;
-    for (const absl::string_view path : paths) total_size += path.size();
-    result.resize(total_size);
-
-    auto begin = result.begin();
-    auto out = begin;
-    bool trailing_slash = false;
-    for (absl::string_view path : paths) {
-      if (path.empty()) continue;
-      if (path.front() == '/') {
-        if (trailing_slash) {
-          path.remove_prefix(1);
-        }
-      } else {
-        if (!trailing_slash && out != begin) *out++ = '/';
-      }
-      const size_t this_size = path.size();
-      memcpy(&*out, path.data(), this_size);
-      out += this_size;
-      trailing_slash = out[-1] == '/';
-    }
-    result.erase(out - begin);
-  }
-  return result;
-}
-}  // namespace internal
-
-// Returns a status or the current working directory.
-PosixErrorOr<std::string> GetCWD() {
-  char buffer[PATH_MAX + 1] = {};
-  if (getcwd(buffer, PATH_MAX) == nullptr) {
-    return PosixError(errno, "GetCWD() failed");
-  }
-
-  return std::string(buffer);
-}
-
-PosixErrorOr<struct stat> Stat(absl::string_view path) {
-  struct stat stat_buf;
-  int res = stat(std::string(path).c_str(), &stat_buf);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("stat ", path));
-  }
-  return stat_buf;
-}
-
-PosixErrorOr<struct stat> Lstat(absl::string_view path) {
-  struct stat stat_buf;
-  int res = lstat(std::string(path).c_str(), &stat_buf);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("lstat ", path));
-  }
-  return stat_buf;
-}
-
-PosixErrorOr<struct stat> Fstat(int fd) {
-  struct stat stat_buf;
-  int res = fstat(fd, &stat_buf);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("fstat ", fd));
-  }
-  return stat_buf;
-}
-
-PosixErrorOr<bool> Exists(absl::string_view path) {
-  struct stat stat_buf;
-  int res = lstat(std::string(path).c_str(), &stat_buf);
-  if (res < 0) {
-    if (errno == ENOENT) {
-      return false;
-    }
-    return PosixError(errno, absl::StrCat("lstat ", path));
-  }
-  return true;
-}
-
-PosixErrorOr<bool> IsDirectory(absl::string_view path) {
-  ASSIGN_OR_RETURN_ERRNO(struct stat stat_buf, Lstat(path));
-  if (S_ISDIR(stat_buf.st_mode)) {
-    return true;
-  }
-
-  return false;
-}
-
-PosixError Delete(absl::string_view path) {
-  int res = unlink(std::string(path).c_str());
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("unlink ", path));
-  }
-
-  return NoError();
-}
-
-PosixError Truncate(absl::string_view path, int length) {
-  int res = truncate(std::string(path).c_str(), length);
-  if (res < 0) {
-    return PosixError(errno,
-                      absl::StrCat("truncate ", path, " to length ", length));
-  }
-
-  return NoError();
-}
-
-PosixError Chmod(absl::string_view path, int mode) {
-  int res = chmod(std::string(path).c_str(), mode);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("chmod ", path));
-  }
-
-  return NoError();
-}
-
-PosixError MknodAt(const FileDescriptor& dfd, absl::string_view path, int mode,
-                   dev_t dev) {
-  int res = mknodat(dfd.get(), std::string(path).c_str(), mode, dev);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("mknod ", path));
-  }
-
-  return NoError();
-}
-
-PosixError Unlink(absl::string_view path) {
-  int res = unlink(std::string(path).c_str());
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("unlink ", path));
-  }
-  return NoError();
-}
-
-PosixError UnlinkAt(const FileDescriptor& dfd, absl::string_view path,
-                    int flags) {
-  int res = unlinkat(dfd.get(), std::string(path).c_str(), flags);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("unlink ", path));
-  }
-
-  return NoError();
-}
-
-PosixError Mkdir(absl::string_view path, int mode) {
-  int res = mkdir(std::string(path).c_str(), mode);
-  if (res < 0) {
-    return PosixError(errno,
-                      absl::StrFormat("mkdir \"%s\" mode %#o", path, mode));
-  }
-
-  return NoError();
-}
-
-PosixError Rmdir(absl::string_view path) {
-  int res = rmdir(std::string(path).c_str());
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("rmdir ", path));
-  }
-
-  return NoError();
-}
-
-PosixError SetContents(absl::string_view path, absl::string_view contents) {
-  ASSIGN_OR_RETURN_ERRNO(bool exists, Exists(path));
-  if (!exists) {
-    return PosixError(
-        ENOENT, absl::StrCat("SetContents file ", path, " doesn't exist."));
-  }
-
-  ASSIGN_OR_RETURN_ERRNO(auto fd, Open(std::string(path), O_WRONLY | O_TRUNC));
-  return WriteContentsToFD(fd.get(), contents);
-}
-
-// Create a file with the given contents (if it does not already exist with the
-// given mode) and then set the contents.
-PosixError CreateWithContents(absl::string_view path,
-                              absl::string_view contents, int mode) {
-  ASSIGN_OR_RETURN_ERRNO(
-      auto fd, Open(std::string(path), O_WRONLY | O_CREAT | O_TRUNC, mode));
-  return WriteContentsToFD(fd.get(), contents);
-}
-
-PosixError GetContents(absl::string_view path, std::string* output) {
-  ASSIGN_OR_RETURN_ERRNO(auto fd, Open(std::string(path), O_RDONLY));
-  output->clear();
-
-  // Keep reading until we hit an EOF or an error.
-  return GetContentsFD(fd.get(), output);
-}
-
-PosixErrorOr<std::string> GetContents(absl::string_view path) {
-  std::string ret;
-  RETURN_IF_ERRNO(GetContents(path, &ret));
-  return ret;
-}
-
-PosixErrorOr<std::string> GetContentsFD(int fd) {
-  std::string ret;
-  RETURN_IF_ERRNO(GetContentsFD(fd, &ret));
-  return ret;
-}
-
-PosixError GetContentsFD(int fd, std::string* output) {
-  // Keep reading until we hit an EOF or an error.
-  while (true) {
-    char buf[16 * 1024] = {};  // Read in 16KB chunks.
-    int bytes_read = read(fd, buf, sizeof(buf));
-    if (bytes_read < 0) {
-      if (errno == EINTR) {
-        continue;
-      }
-      return PosixError(errno, "GetContentsFD read failure.");
-    }
-
-    if (bytes_read == 0) {
-      break;  // EOF.
-    }
-
-    output->append(buf, bytes_read);
-  }
-  return NoError();
-}
-
-PosixErrorOr<std::string> ReadLink(absl::string_view path) {
-  char buf[PATH_MAX + 1] = {};
-  int ret = readlink(std::string(path).c_str(), buf, PATH_MAX);
-  if (ret < 0) {
-    return PosixError(errno, absl::StrCat("readlink ", path));
-  }
-
-  return std::string(buf, ret);
-}
-
-PosixError WalkTree(
-    absl::string_view path, bool recursive,
-    const std::function<void(absl::string_view, const struct stat&)>& cb) {
-  DIR* dir = opendir(std::string(path).c_str());
-  if (dir == nullptr) {
-    return PosixError(errno, absl::StrCat("opendir ", path));
-  }
-  auto dir_closer = Cleanup([&dir]() { closedir(dir); });
-  while (true) {
-    // Readdir(3): If the end of the directory stream is reached, NULL is
-    // returned and errno is not changed.  If an error occurs, NULL is returned
-    // and errno is set appropriately.  To distinguish end of stream and from an
-    // error, set errno to zero before calling readdir() and then check the
-    // value of errno if NULL is returned.
-    errno = 0;
-    struct dirent* dp = readdir(dir);
-    if (dp == nullptr) {
-      if (errno != 0) {
-        return PosixError(errno, absl::StrCat("readdir ", path));
-      }
-      break;  // We're done.
-    }
-
-    if (strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0) {
-      // Skip dots.
-      continue;
-    }
-
-    auto full_path = JoinPath(path, dp->d_name);
-    ASSIGN_OR_RETURN_ERRNO(struct stat s, Stat(full_path));
-    if (S_ISDIR(s.st_mode) && recursive) {
-      RETURN_IF_ERRNO(WalkTree(full_path, recursive, cb));
-    } else {
-      cb(full_path, s);
-    }
-  }
-  // We're done walking so let's invoke our cleanup callback now.
-  dir_closer.Release()();
-
-  // And we have to dispatch the callback on the base directory.
-  ASSIGN_OR_RETURN_ERRNO(struct stat s, Stat(path));
-  cb(path, s);
-
-  return NoError();
-}
-
-PosixErrorOr<std::vector<std::string>> ListDir(absl::string_view abspath,
-                                               bool skipdots) {
-  std::vector<std::string> files;
-
-  DIR* dir = opendir(std::string(abspath).c_str());
-  if (dir == nullptr) {
-    return PosixError(errno, absl::StrCat("opendir ", abspath));
-  }
-  auto dir_closer = Cleanup([&dir]() { closedir(dir); });
-  while (true) {
-    // Readdir(3): If the end of the directory stream is reached, NULL is
-    // returned and errno is not changed.  If an error occurs, NULL is returned
-    // and errno is set appropriately.  To distinguish end of stream and from an
-    // error, set errno to zero before calling readdir() and then check the
-    // value of errno if NULL is returned.
-    errno = 0;
-    struct dirent* dp = readdir(dir);
-    if (dp == nullptr) {
-      if (errno != 0) {
-        return PosixError(errno, absl::StrCat("readdir ", abspath));
-      }
-      break;  // We're done.
-    }
-
-    if (strcmp(dp->d_name, ".") == 0 || strcmp(dp->d_name, "..") == 0) {
-      if (skipdots) {
-        continue;
-      }
-    }
-    files.push_back(std::string(dp->d_name));
-  }
-
-  return files;
-}
-
-PosixError DirContains(absl::string_view path,
-                       const std::vector<std::string>& expect,
-                       const std::vector<std::string>& exclude) {
-  ASSIGN_OR_RETURN_ERRNO(auto listing, ListDir(path, false));
-
-  for (auto& expected_entry : expect) {
-    auto cursor = std::find(listing.begin(), listing.end(), expected_entry);
-    if (cursor == listing.end()) {
-      return PosixError(ENOENT, absl::StrFormat("Failed to find '%s' in '%s'",
-                                                expected_entry, path));
-    }
-  }
-  for (auto& excluded_entry : exclude) {
-    auto cursor = std::find(listing.begin(), listing.end(), excluded_entry);
-    if (cursor != listing.end()) {
-      return PosixError(ENOENT, absl::StrCat("File '", excluded_entry,
-                                             "' found in path '", path, "'"));
-    }
-  }
-  return NoError();
-}
-
-PosixError EventuallyDirContains(absl::string_view path,
-                                 const std::vector<std::string>& expect,
-                                 const std::vector<std::string>& exclude) {
-  constexpr int kRetryCount = 100;
-  const absl::Duration kRetryDelay = absl::Milliseconds(100);
-
-  for (int i = 0; i < kRetryCount; ++i) {
-    auto res = DirContains(path, expect, exclude);
-    if (res.ok()) {
-      return res;
-    }
-    if (i < kRetryCount - 1) {
-      // Sleep if this isn't the final iteration.
-      absl::SleepFor(kRetryDelay);
-    }
-  }
-  return PosixError(ETIMEDOUT,
-                    "Timed out while waiting for directory to contain files ");
-}
-
-PosixError RecursivelyDelete(absl::string_view path, int* undeleted_dirs,
-                             int* undeleted_files) {
-  ASSIGN_OR_RETURN_ERRNO(bool exists, Exists(path));
-  if (!exists) {
-    return PosixError(ENOENT, absl::StrCat(path, " does not exist"));
-  }
-
-  ASSIGN_OR_RETURN_ERRNO(bool dir, IsDirectory(path));
-  if (!dir) {
-    // Nothing recursive needs to happen we can just call Delete.
-    auto status = Delete(path);
-    if (!status.ok() && undeleted_files) {
-      (*undeleted_files)++;
-    }
-    return status;
-  }
-
-  return WalkTree(path, /*recursive=*/true,
-                  [&](absl::string_view absolute_path, const struct stat& s) {
-                    if (S_ISDIR(s.st_mode)) {
-                      auto rm_status = Rmdir(absolute_path);
-                      if (!rm_status.ok() && undeleted_dirs) {
-                        (*undeleted_dirs)++;
-                      }
-                    } else {
-                      auto delete_status = Delete(absolute_path);
-                      if (!delete_status.ok() && undeleted_files) {
-                        (*undeleted_files)++;
-                      }
-                    }
-                  });
-}
-
-PosixError RecursivelyCreateDir(absl::string_view path) {
-  if (path.empty() || path == "/") {
-    return PosixError(EINVAL, "Cannot create root!");
-  }
-
-  // Does it already exist, if so we're done.
-  ASSIGN_OR_RETURN_ERRNO(bool exists, Exists(path));
-  if (exists) {
-    return NoError();
-  }
-
-  // Do we need to create directories under us?
-  auto dirname = Dirname(path);
-  ASSIGN_OR_RETURN_ERRNO(exists, Exists(dirname));
-  if (!exists) {
-    RETURN_IF_ERRNO(RecursivelyCreateDir(dirname));
-  }
-
-  return Mkdir(path);
-}
-
-// Makes a path absolute with respect to an optional base. If no base is
-// provided it will use the current working directory.
-PosixErrorOr<std::string> MakeAbsolute(absl::string_view filename,
-                                       absl::string_view base) {
-  if (filename.empty()) {
-    return PosixError(EINVAL, "filename cannot be empty.");
-  }
-
-  if (filename[0] == '/') {
-    // This path is already absolute.
-    return std::string(filename);
-  }
-
-  std::string actual_base;
-  if (!base.empty()) {
-    actual_base = std::string(base);
-  } else {
-    auto cwd_or = GetCWD();
-    RETURN_IF_ERRNO(cwd_or.error());
-    actual_base = cwd_or.ValueOrDie();
-  }
-
-  // Reverse iterate removing trailing slashes, effectively right trim '/'.
-  for (int i = actual_base.size() - 1; i >= 0 && actual_base[i] == '/'; --i) {
-    actual_base.erase(i, 1);
-  }
-
-  if (filename == ".") {
-    return actual_base.empty() ? "/" : actual_base;
-  }
-
-  return absl::StrCat(actual_base, "/", filename);
-}
-
-std::string CleanPath(const absl::string_view unclean_path) {
-  std::string path = std::string(unclean_path);
-  const char* src = path.c_str();
-  std::string::iterator dst = path.begin();
-
-  // Check for absolute path and determine initial backtrack limit.
-  const bool is_absolute_path = *src == '/';
-  if (is_absolute_path) {
-    *dst++ = *src++;
-    while (*src == '/') ++src;
-  }
-  std::string::const_iterator backtrack_limit = dst;
-
-  // Process all parts
-  while (*src) {
-    bool parsed = false;
-
-    if (src[0] == '.') {
-      //  1dot ".<whateverisnext>", check for END or SEP.
-      if (src[1] == '/' || !src[1]) {
-        if (*++src) {
-          ++src;
-        }
-        parsed = true;
-      } else if (src[1] == '.' && (src[2] == '/' || !src[2])) {
-        // 2dot END or SEP (".." | "../<whateverisnext>").
-        src += 2;
-        if (dst != backtrack_limit) {
-          // We can backtrack the previous part
-          for (--dst; dst != backtrack_limit && dst[-1] != '/'; --dst) {
-            // Empty.
-          }
-        } else if (!is_absolute_path) {
-          // Failed to backtrack and we can't skip it either. Rewind and copy.
-          src -= 2;
-          *dst++ = *src++;
-          *dst++ = *src++;
-          if (*src) {
-            *dst++ = *src;
-          }
-          // We can never backtrack over a copied "../" part so set new limit.
-          backtrack_limit = dst;
-        }
-        if (*src) {
-          ++src;
-        }
-        parsed = true;
-      }
-    }
-
-    // If not parsed, copy entire part until the next SEP or EOS.
-    if (!parsed) {
-      while (*src && *src != '/') {
-        *dst++ = *src++;
-      }
-      if (*src) {
-        *dst++ = *src++;
-      }
-    }
-
-    // Skip consecutive SEP occurrences
-    while (*src == '/') {
-      ++src;
-    }
-  }
-
-  // Calculate and check the length of the cleaned path.
-  int path_length = dst - path.begin();
-  if (path_length != 0) {
-    // Remove trailing '/' except if it is root path ("/" ==> path_length := 1)
-    if (path_length > 1 && path[path_length - 1] == '/') {
-      --path_length;
-    }
-    path.resize(path_length);
-  } else {
-    // The cleaned path is empty; assign "." as per the spec.
-    path.assign(1, '.');
-  }
-  return path;
-}
-
-PosixErrorOr<std::string> GetRelativePath(absl::string_view source,
-                                          absl::string_view dest) {
-  if (!absl::StartsWith(source, "/") || !absl::StartsWith(dest, "/")) {
-    // At least one of the inputs is not an absolute path.
-    return PosixError(
-        EINVAL,
-        "GetRelativePath: At least one of the inputs is not an absolute path.");
-  }
-  const std::string clean_source = CleanPath(source);
-  const std::string clean_dest = CleanPath(dest);
-  auto source_parts = absl::StrSplit(clean_source, '/', absl::SkipEmpty());
-  auto dest_parts = absl::StrSplit(clean_dest, '/', absl::SkipEmpty());
-  auto source_iter = source_parts.begin();
-  auto dest_iter = dest_parts.begin();
-
-  // Advance past common prefix.
-  while (source_iter != source_parts.end() && dest_iter != dest_parts.end() &&
-         *source_iter == *dest_iter) {
-    ++source_iter;
-    ++dest_iter;
-  }
-
-  // Build result backtracking.
-  std::string result = "";
-  while (source_iter != source_parts.end()) {
-    absl::StrAppend(&result, "../");
-    ++source_iter;
-  }
-
-  // Add remaining path to dest.
-  while (dest_iter != dest_parts.end()) {
-    absl::StrAppend(&result, *dest_iter, "/");
-    ++dest_iter;
-  }
-
-  if (result.empty()) {
-    return std::string(".");
-  }
-
-  // Remove trailing slash.
-  result.erase(result.size() - 1);
-  return result;
-}
-
-absl::string_view Dirname(absl::string_view path) {
-  return SplitPath(path).first;
-}
-
-absl::string_view Basename(absl::string_view path) {
-  return SplitPath(path).second;
-}
-
-std::pair<absl::string_view, absl::string_view> SplitPath(
-    absl::string_view path) {
-  std::string::size_type pos = path.find_last_of('/');
-
-  // Handle the case with no '/' in 'path'.
-  if (pos == absl::string_view::npos) {
-    return std::make_pair(path.substr(0, 0), path);
-  }
-
-  // Handle the case with a single leading '/' in 'path'.
-  if (pos == 0) {
-    return std::make_pair(path.substr(0, 1), absl::ClippedSubstr(path, 1));
-  }
-
-  return std::make_pair(path.substr(0, pos),
-                        absl::ClippedSubstr(path, pos + 1));
-}
-
-std::string JoinPath(absl::string_view path1, absl::string_view path2) {
-  if (path1.empty()) {
-    return std::string(path2);
-  }
-  if (path2.empty()) {
-    return std::string(path1);
-  }
-
-  if (path1.back() == '/') {
-    if (path2.front() == '/') {
-      return absl::StrCat(path1, absl::ClippedSubstr(path2, 1));
-    }
-  } else {
-    if (path2.front() != '/') {
-      return absl::StrCat(path1, "/", path2);
-    }
-  }
-  return absl::StrCat(path1, path2);
-}
-
-PosixErrorOr<std::string> ProcessExePath(int pid) {
-  if (pid <= 0) {
-    return PosixError(EINVAL, "Invalid pid specified");
-  }
-
-  return ReadLink(absl::StrCat("/proc/", pid, "/exe"));
-}
-
-#ifdef __linux__
-PosixErrorOr<bool> IsTmpfs(const std::string& path) {
-  struct statfs stat;
-  if (statfs(path.c_str(), &stat)) {
-    if (errno == ENOENT) {
-      // Nothing at path, don't raise this as an error. Instead, just report no
-      // tmpfs at path.
-      return false;
-    }
-    return PosixError(errno,
-                      absl::StrFormat("statfs(\"%s\", %#p)", path, &stat));
-  }
-  return stat.f_type == TMPFS_MAGIC;
-}
-#endif  // __linux__
-
-PosixErrorOr<bool> IsOverlayfs(const std::string& path) {
-  struct statfs stat;
-  if (statfs(path.c_str(), &stat)) {
-    if (errno == ENOENT) {
-      // Nothing at path, don't raise this as an error. Instead, just report no
-      // overlayfs at path.
-      return false;
-    }
-    return PosixError(errno,
-                      absl::StrFormat("statfs(\"%s\", %#p)", path, &stat));
-  }
-  return stat.f_type == OVERLAYFS_SUPER_MAGIC;
-}
-
-PosixError CheckSameFile(const FileDescriptor& fd1, const FileDescriptor& fd2) {
-  struct stat stat_result1, stat_result2;
-  int res = fstat(fd1.get(), &stat_result1);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("fstat ", fd1.get()));
-  }
-
-  res = fstat(fd2.get(), &stat_result2);
-  if (res < 0) {
-    return PosixError(errno, absl::StrCat("fstat ", fd2.get()));
-  }
-  EXPECT_EQ(stat_result1.st_dev, stat_result2.st_dev);
-  EXPECT_EQ(stat_result1.st_ino, stat_result2.st_ino);
-
-  return NoError();
-}
-}  // namespace testing
-}  // namespace gvisor