From 39e65e0113e188e4177077407d337bb3a1ac1853 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Wed, 5 Jun 2002 20:58:59 +0000
Subject: 2002-06-05  Jeff Johnston  <jjohnstn@redhat.com>

        * libc/include/string.h[__linux__]: Add strsignal prototype.
        * libc/include/sys/lock.h: New file with default locking support.
        * libc/include/sys/reent.h: Add signal buffer support for strsignal
        and psignal.
        * libc/posix/Makefile.am: Add support for readdir_r.c.
        * libc/posix/Makefile.in: Regenerated.
        * libc/posix/closedir.c: Add locking support and hash table cleanup.
        * libc/posix/opendir.c: Add lock support.
        * libc/posix/readdir.c: Ditto.
        * libc/posix/rewinddir.c: Ditto.
        * libc/posix/scandir.c: Ditto.
        * libc/posix/seekdir.c: Ditto.
        * libc/posix/telldir.c: Ditto plus add _cleanupdir routine to
        clean up leftover hash table entries.
        * libc/posix/readdir_r.c: New file.
        * libc/sys/linux/Makefile.am: Add psignal.c and strsignal.c support.
        * libc/sys/linux/Makefile.in: Regenerated.
        * libc/sys/linux/sys/dirent.h: Add dd_lock to DIR structure.
        * libc/sys/linux/sys/signal.h: Add psignal prototype.
        * libc/sys/linux/psignal.c: New file.
        * libc/sys/linux/strsignal.c: Ditto.
---
 newlib/libc/posix/readdir_r.c | 108 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 newlib/libc/posix/readdir_r.c

(limited to 'newlib/libc/posix/readdir_r.c')

diff --git a/newlib/libc/posix/readdir_r.c b/newlib/libc/posix/readdir_r.c
new file mode 100644
index 000000000..805180cf5
--- /dev/null
+++ b/newlib/libc/posix/readdir_r.c
@@ -0,0 +1,108 @@
+#ifndef HAVE_OPENDIR
+
+/*
+ * Copyright (c) 1983 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.
+ */
+
+/* this code is modified from readdir.c by Jeff Johnston, June 5, 2002 */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+static char sccsid[] = "@(#)readdir.c	5.7 (Berkeley) 6/1/90";
+#endif /* LIBC_SCCS and not lint */
+
+#include <dirent.h>
+#include <errno.h>
+#include <string.h>
+
+extern int getdents (int fd, void *dp, int count);
+
+/*
+ * get next entry in a directory using supplied dirent structure.
+ */
+int
+readdir_r(dirp, dp, dpp)
+	register DIR *dirp;
+	struct dirent *dp;
+	struct dirent **dpp; {
+
+struct dirent *tmpdp;
+ 
+#ifdef HAVE_DD_LOCK
+  __lock_acquire_recursive(dirp->dd_lock);
+#endif
+
+  if (dirp->dd_fd == -1) {
+    *dpp = NULL;
+    return errno = EBADF;
+  }
+ 
+  for (;;) {
+    if (dirp->dd_loc == 0) {
+      dirp->dd_size = getdents (dirp->dd_fd,
+				dirp->dd_buf,
+				dirp->dd_len);
+      
+      if (dirp->dd_size <= 0) {
+#ifdef HAVE_DD_LOCK
+        __lock_release_recursive(dirp->dd_lock);
+#endif
+        *dpp = NULL;
+        return errno;
+      }
+    }
+    if (dirp->dd_loc >= dirp->dd_size) {
+      dirp->dd_loc = 0;
+      continue;
+    }
+    tmpdp = (struct dirent *)(dirp->dd_buf + dirp->dd_loc);
+    memcpy (dp, tmpdp, sizeof(struct dirent));
+
+    if (dp->d_reclen <= 0 ||
+	dp->d_reclen > dirp->dd_len + 1 - dirp->dd_loc) {
+#ifdef HAVE_DD_LOCK
+      __lock_release_recursive(dirp->dd_lock);
+#endif
+      *dpp = NULL;
+      return -1;
+    }
+    dirp->dd_loc += dp->d_reclen;
+    if (dp->d_ino == 0)
+      continue;
+#ifdef HAVE_DD_LOCK
+    __lock_release_recursive(dirp->dd_lock);
+#endif
+    *dpp = dp;
+    return 0;
+  }
+}
+
+#endif /* ! HAVE_OPENDIR */
-- 
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