* libc/include/sys/stdio.h: New file.

	* libc/sys/linux/sys/stdio.h: New file.
	* libc/include/stdio.h: Add declarations for flockfile,
	ftrylockfile, and funlockfile.  Include <sys/stdio.h>.
	* libc/stdio/clearerr.c: Add file locking.
	* libc/stdio/fclose.c: Likewise.
	* libc/stdio/feof.c: Likewise.
	* libc/stdio/ferror.c: Likewise.
	* libc/stdio/fflush.c: Likewise.
	* libc/stdio/fgetc.c: Likewise.
	* libc/stdio/fgetpos.c: Likewise.
	* libc/stdio/fgets.c: Likewise.
	* libc/stdio/fileno.c: Likewise.
	* libc/stdio/fputc.c: Likewise.
	* libc/stdio/fputs.c: Likewise.
	* libc/stdio/fread.c: Likewise.
	* libc/stdio/freopen.c: Likewise.
	* libc/stdio/fseek.c: Likewise.
	* libc/stdio/ftell.c: Likewise.
	* libc/stdio/fwrite.c: Likewise.
	* libc/stdio/getc.c: Likewise.
	* libc/stdio/putc.c: Likewise.
	* libc/stdio/setvbuf.c: Likewise.
	* libc/stdio/ungetc.c: Likewise.
	* libc/stdio/vfprintf.c: Likewise.

1 files changed, 7 insertions, 1 deletions

diff --git a/newlib/libc/stdio/fclose.c b/newlib/libc/stdio/fclose.c
index 3266d8a55..ad3d1e8e0 100644
--- a/newlib/libc/stdio/fclose.c
+++ b/newlib/libc/stdio/fclose.c
@@ -64,10 +64,15 @@ _DEFUN (fclose, (fp),
   if (fp == NULL)
     return (0);			/* on NULL */
 
+  _flockfile(fp);
+  
   CHECK_INIT (fp);
 
   if (fp->_flags == 0)		/* not open! */
-    return (0);
+    {
+      _funlockfile(fp);
+      return (0);
+    }
   r = fp->_flags & __SWR ? fflush (fp) : 0;
   if (fp->_close != NULL && (*fp->_close) (fp->_cookie) < 0)
     r = EOF;
@@ -78,5 +83,6 @@ _DEFUN (fclose, (fp),
   if (HASLB (fp))
     FREELB (fp);
   fp->_flags = 0;		/* release this FILE for reuse */
+  _funlockfile(fp);
   return (r);
 }