* 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, 5 insertions, 0 deletions

diff --git a/newlib/libc/stdio/freopen.c b/newlib/libc/stdio/freopen.c
index 63f583375..ea61f0463 100644
--- a/newlib/libc/stdio/freopen.c
+++ b/newlib/libc/stdio/freopen.c
@@ -76,12 +76,15 @@ _DEFUN (freopen, (file, mode, fp),
   int flags, oflags, e;
   struct _reent *ptr;
 
+  _flockfile(fp);
+
   CHECK_INIT (fp);
   ptr = fp->_data;
 
   if ((flags = __sflags (ptr, mode, &oflags)) == 0)
     {
       (void) fclose (fp);
+      _funlockfile(fp);
       return NULL;
     }
 
@@ -137,6 +140,7 @@ _DEFUN (freopen, (file, mode, fp),
     {				/* did not get it after all */
       fp->_flags = 0;		/* set it free */
       ptr->_errno = e;		/* restore in case _close clobbered */
+      _funlockfile(fp);
       return NULL;
     }
 
@@ -153,5 +157,6 @@ _DEFUN (freopen, (file, mode, fp),
     fp->_flags |= __SCLE;
 #endif
 
+  _funlockfile(fp);
   return fp;
 }