[src/trunk]: src/distrib/utils/libhack Prune out references to qsort in opend...

[gwr <gwr%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c56605f0f513
branches:  trunk
changeset: 473064:c56605f0f513
user:      gwr <gwr%NetBSD.org@localhost>
date:      Wed May 19 03:53:03 1999 +0000

description:
Prune out references to qsort in opendir unionfs code.
(Never needed on a ramdisk root.)

diffstat:

 distrib/utils/libhack/opendir.c |  97 +++++++++++++++++++++++++++++++++++++++++
 1 files changed, 97 insertions(+), 0 deletions(-)

diffs (101 lines):

diff -r 143c2fb05ff7 -r c56605f0f513 distrib/utils/libhack/opendir.c
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/distrib/utils/libhack/opendir.c   Wed May 19 03:53:03 1999 +0000
@@ -0,0 +1,97 @@
+/*     $NetBSD: opendir.c,v 1.1 1999/05/19 03:53:03 gwr Exp $  */
+
+/*
+ * Copyright (c) 1983, 1993
+ *     The Regents of the University of California.  All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/mount.h>
+#include <sys/stat.h>
+
+#include <dirent.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+/*
+ * Open a directory.
+ */
+DIR *
+opendir(name)
+       const char *name;
+{
+       DIR *dirp;
+       int fd;
+       struct stat sb;
+       int pagesz;
+
+       if ((fd = open(name, O_RDONLY | O_NONBLOCK)) == -1)
+               return (NULL);
+       if (fstat(fd, &sb) || !S_ISDIR(sb.st_mode)) {
+               errno = ENOTDIR;
+               close(fd);
+               return (NULL);
+       }
+       if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1 ||
+           (dirp = (DIR *)malloc(sizeof(DIR))) == NULL) {
+               close(fd);
+               return (NULL);
+       }
+
+       /*
+        * Determine whether this directory is the top of a union stack.
+        * (Never is on a ramdisk)
+        */
+       {
+               dirp->dd_len = DIRBLKSIZ;
+               dirp->dd_buf = malloc((size_t)dirp->dd_len);
+               if (dirp->dd_buf == NULL) {
+                       free(dirp);
+                       close (fd);
+                       return (NULL);
+               }
+               dirp->dd_seek = 0;
+       }
+
+       dirp->dd_loc = 0;
+       dirp->dd_fd = fd;
+       dirp->dd_flags = DTF_HIDEW;
+
+       /*
+        * Set up seek point for rewinddir.
+        */
+       dirp->dd_rewind = telldir(dirp);
+
+       return (dirp);
+}