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-rw-r--r--lib/sh/setlinebuf.c66
1 files changed, 66 insertions, 0 deletions
diff --git a/lib/sh/setlinebuf.c b/lib/sh/setlinebuf.c
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--- /dev/null
+++ b/lib/sh/setlinebuf.c
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+/* 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 */
+}