Add bash 5.2 to third_party

third_party/bash/setlinebuf.c

@@ -0,0 +1,66 @@
+/* setlinebuf.c - line-buffer a stdio stream. */
+
+/* Copyright (C) 1997,2022 Free Software Foundation, Inc.
+
+   This file is part of GNU Bash, the Bourne Again SHell.
+
+   Bash is free software: you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   Bash is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with Bash.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "config.h"
+
+#include <stdio.h>
+
+#include "xmalloc.h"
+
+#if defined (USING_BASH_MALLOC)
+#  define LBUF_BUFSIZE	2016
+#else
+#  define LBUF_BUFSIZE	BUFSIZ
+#endif
+
+static char *stdoutbuf = 0;
+static char *stderrbuf = 0;
+
+/* Cause STREAM to buffer lines as opposed to characters or blocks. */
+int
+sh_setlinebuf (stream)
+     FILE *stream;
+{
+#if !defined (HAVE_SETLINEBUF) && !defined (HAVE_SETVBUF)
+  return (0);
+#endif
+
+#if defined (HAVE_SETVBUF)
+  char *local_linebuf;
+
+#if defined (USING_BASH_MALLOC)
+  if (stream == stdout && stdoutbuf == 0)
+    local_linebuf = stdoutbuf = (char *)xmalloc (LBUF_BUFSIZE);
+  else if (stream == stderr && stderrbuf == 0)
+    local_linebuf = stderrbuf = (char *)xmalloc (LBUF_BUFSIZE);
+  else
+    local_linebuf = (char *)NULL;	/* let stdio handle it */
+#else
+  local_linebuf = (char *)NULL;
+#endif
+
+  return (setvbuf (stream, local_linebuf, _IOLBF, LBUF_BUFSIZE));
+#else /* !HAVE_SETVBUF */
+
+  setlinebuf (stream);
+  return (0);
+
+#endif /* !HAVE_SETVBUF */
+}