Libc-997.1.1.tar.gz

[apple/libc.git] / stdio / FreeBSD / fopen.c

diff --git a/stdio/FreeBSD/fopen.c b/stdio/FreeBSD/fopen.c
index 5a043ca72c51b9d432f64afb8dab271b68901dc4..df3deea7d5d401433ee605257236572404e09622 100644 (file)
--- a/stdio/FreeBSD/fopen.c
+++ b/stdio/FreeBSD/fopen.c
@@ -13,10 +13,6 @@
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- *    must display the following acknowledgement:
- *     This product includes software developed by the University of
- *     California, Berkeley and its contributors.
  * 4. Neither the name of the University nor the names of its contributors
  *    may be used to endorse or promote products derived from this software
  *    without specific prior written permission.
@@ -34,18 +30,29 @@
  * SUCH DAMAGE.
  */
 
+#ifdef VARIANT_DARWINEXTSN
+#define _DARWIN_UNLIMITED_STREAMS
+#define COUNT  0
+#elif defined(VARIANT_LEGACY)
+#define COUNT  0
+#else
+#define COUNT  1
+#endif
+
 #if defined(LIBC_SCCS) && !defined(lint)
 static char sccsid[] = "@(#)fopen.c    8.1 (Berkeley) 6/4/93";
 #endif /* LIBC_SCCS and not lint */
 #include <sys/cdefs.h>
-__FBSDID("$FreeBSD: src/lib/libc/stdio/fopen.c,v 1.10 2002/10/12 16:13:37 mike Exp $");
+__FBSDID("$FreeBSD: src/lib/libc/stdio/fopen.c,v 1.14 2008/04/22 17:03:32 jhb Exp $");
 
 #include "namespace.h"
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#include <unistd.h>
 #include <stdio.h>
 #include <errno.h>
+#include <limits.h>
 #include "un-namespace.h"
 
 #include "local.h"
@@ -61,10 +68,23 @@ fopen(file, mode)
 
        if ((flags = __sflags(mode, &oflags)) == 0)
                return (NULL);
-       if ((fp = __sfp()) == NULL)
+       if ((fp = __sfp(COUNT)) == NULL)
                return (NULL);
        if ((f = _open(file, oflags, DEFFILEMODE)) < 0) {
+               __sfprelease(fp);               /* release */
+               return (NULL);
+       }
+       /*
+        * File descriptors are a full int, but _file is only a short.
+        * If we get a valid file descriptor that is greater than
+        * SHRT_MAX, then the fd will get sign-extended into an
+        * invalid file descriptor.  Handle this case by failing the
+        * open.
+        */
+       if (f > SHRT_MAX) {
                fp->_flags = 0;                 /* release */
+               _close(f);
+               errno = EMFILE;
                return (NULL);
        }
        fp->_file = f;