Bazel client: reduce dependency on <unistd.h>
In this change:
- rename WriteFileToStreamOrDie to
WriteFileToStderrOrDie (since we only ever used it
for stderr)
- replace open/write/read/close operations with
blaze_util::ReadFile/WriteFile
- wrap ToString(getpid()) in a utility function
- move SyncFile to file_<platform>
--
MOS_MIGRATED_REVID=139560397
diff --git a/src/main/cpp/blaze_util.h b/src/main/cpp/blaze_util.h
index 06e9c9b..eee40f9 100644
--- a/src/main/cpp/blaze_util.h
+++ b/src/main/cpp/blaze_util.h
@@ -46,17 +46,26 @@
int MakeDirectories(const std::string &path, mode_t mode);
// Replaces 'content' with contents of file 'filename'.
+// If `max_size` is positive, the method reads at most that many bytes; if it
+// is 0, the method reads the whole file.
// Returns false on error. Can be called from a signal handler.
-bool ReadFile(const std::string &filename, std::string *content);
+bool ReadFile(const std::string &filename, std::string *content,
+ size_t max_size = 0);
// Replaces 'content' with contents of file descriptor 'fd'.
+// If `max_size` is positive, the method reads at most that many bytes; if it
+// is 0, the method reads the whole file.
// Returns false on error. Can be called from a signal handler.
-bool ReadFileDescriptor(int fd, std::string *content);
+bool ReadFileDescriptor(int fd, std::string *content, size_t max_size = 0);
// Writes 'content' into file 'filename', and makes it executable.
// Returns false on failure, sets errno.
bool WriteFile(const std::string &content, const std::string &filename);
+// Writes `size` bytes from `data` into file 'filename' and makes it executable.
+// Returns false on failure, sets errno.
+bool WriteFile(const void* data, size_t size, const std::string &filename);
+
// Unlinks the file given by 'file_path'.
// Returns true on success. In case of failure sets errno.
bool UnlinkPath(const std::string &file_path);
