[PATCH] D63858: [Support] Add sys::fs::is_tty() wrapper around isatty(3)

[Alex Brachet via Phabricator via llvm-commits]

abrachet created this revision.
abrachet added reviewers: jhenderson, rupprecht.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.

Adds a wrapper in Support/Filesystem.h for determining if a file descriptor refers to a terminal.

This patch is needed by an upcoming patch which needs to know if stdin has redirected input or not.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D63858

Files:
  llvm/include/llvm/Support/FileSystem.h
  llvm/lib/Support/Unix/Path.inc
  llvm/lib/Support/Windows/Path.inc


Index: llvm/lib/Support/Windows/Path.inc
===================================================================
--- llvm/lib/Support/Windows/Path.inc
+++ llvm/lib/Support/Windows/Path.inc
@@ -734,6 +734,10 @@
   return getStatus(FileHandle, Result);
 }
 
+bool is_tty(int FD) {
+  return _isatty(FD);
+}
+
 std::error_code setPermissions(const Twine &Path, perms Permissions) {
   SmallVector<wchar_t, 128> PathUTF16;
   if (std::error_code EC = widenPath(Path, PathUTF16))
Index: llvm/lib/Support/Unix/Path.inc
===================================================================
--- llvm/lib/Support/Unix/Path.inc
+++ llvm/lib/Support/Unix/Path.inc
@@ -694,6 +694,10 @@
   return fillStatus(StatRet, Status, Result);
 }
 
+bool is_tty(int FD) {
+  return isatty(FD);
+}
+
 std::error_code setPermissions(const Twine &Path, perms Permissions) {
   SmallString<128> PathStorage;
   StringRef P = Path.toNullTerminatedStringRef(PathStorage);
Index: llvm/include/llvm/Support/FileSystem.h
===================================================================
--- llvm/include/llvm/Support/FileSystem.h
+++ llvm/include/llvm/Support/FileSystem.h
@@ -634,6 +634,12 @@
 ///          platform-specific error_code.
 std::error_code is_other(const Twine &path, bool &result);
 
+/// Does FD refer to a terminal?
+///
+/// @param FD Input file descriptor.
+/// @returns true if the file descriptor refers to a terminal.
+bool is_tty(int FD);
+
 /// Get file status as if by POSIX stat().
 ///
 /// @param path Input path.


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