From c55fbd1ea768f9fdef34a01377702c0d72cbc213 Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@gmail.com>
Date: Tue, 9 Aug 2011 09:57:55 -0400
Subject: Implement scandirat function

---
 sysdeps/unix/sysv/linux/i386/scandir64.c | 102 +++++++++++++++++++++++++++++--
 1 file changed, 97 insertions(+), 5 deletions(-)

(limited to 'sysdeps/unix/sysv/linux/i386')

diff --git a/sysdeps/unix/sysv/linux/i386/scandir64.c b/sysdeps/unix/sysv/linux/i386/scandir64.c
index 837e1b9438..dacac0a44c 100644
--- a/sysdeps/unix/sysv/linux/i386/scandir64.c
+++ b/sysdeps/unix/sysv/linux/i386/scandir64.c
@@ -19,6 +19,7 @@
 #include <dirent.h>
 
 #define SCANDIR __scandir64
+#define SCANDIRAT __scandirat64
 #define READDIR __readdir64
 #define DIRENT_TYPE struct dirent64
 #define SKIP_SCANDIR_CANCEL 1
@@ -34,15 +35,106 @@
 versioned_symbol (libc, __scandir64, scandir64, GLIBC_2_2);
 
 #if SHLIB_COMPAT(libc, GLIBC_2_1, GLIBC_2_2)
+# include <errno.h>
+# include "olddirent.h"
 
-#include <sysdeps/unix/sysv/linux/i386/olddirent.h>
+int
+__old_scandir64 (dir, namelist, select, cmp)
+     const char *dir;
+     struct __old_dirent64 ***namelist;
+     int (*select) (const struct __old_dirent64 *);
+     int (*cmp) (const struct __old_dirent64 **,
+		 const struct __old_dirent64 **);
+{
+  DIR *dp = __opendir (dir);
+  struct __old_dirent64 **v = NULL;
+  size_t vsize = 0;
+  struct scandir_cancel_struct c;
+  struct __old_dirent64 *d;
+  int save;
 
-#define SCANDIR attribute_compat_text_section __old_scandir64
-#define READDIR __old_readdir64
-#define DIRENT_TYPE struct __old_dirent64
+  if (dp == NULL)
+    return -1;
 
-#include <dirent/scandir.c>
+  save = errno;
+  __set_errno (0);
+
+  c.dp = dp;
+  c.v = NULL;
+  c.cnt = 0;
+  __libc_cleanup_push (__scandir_cancel_handler, &c);
+
+  while ((d = __old_readdir64 (dp)) != NULL)
+    {
+      int use_it = select == NULL;
+
+      if (! use_it)
+	{
+	  use_it = select (d);
+	  /* The select function might have changed errno.  It was
+	     zero before and it need to be again to make the latter
+	     tests work.  */
+	  __set_errno (0);
+	}
+
+      if (use_it)
+	{
+	  struct __old_dirent64 *vnew;
+	  size_t dsize;
+
+	  /* Ignore errors from select or readdir */
+	  __set_errno (0);
+
+	  if (__builtin_expect (c.cnt == vsize, 0))
+	    {
+	      struct __old_dirent64 **new;
+	      if (vsize == 0)
+		vsize = 10;
+	      else
+		vsize *= 2;
+	      new = (struct __old_dirent64 **) realloc (v,
+							vsize * sizeof (*v));
+	      if (new == NULL)
+		break;
+	      v = new;
+	      c.v = (void *) v;
+	    }
+
+	  dsize = &d->d_name[_D_ALLOC_NAMLEN (d)] - (char *) d;
+	  vnew = (struct __old_dirent64 *) malloc (dsize);
+	  if (vnew == NULL)
+	    break;
+
+	  v[c.cnt++] = (struct __old_dirent64 *) memcpy (vnew, d, dsize);
+	}
+    }
+
+  if (__builtin_expect (errno, 0) != 0)
+    {
+      save = errno;
+
+      while (c.cnt > 0)
+	free (v[--c.cnt]);
+      free (v);
+      c.cnt = -1;
+    }
+  else
+    {
+      /* Sort the list if we have a comparison function to sort with.  */
+      if (cmp != NULL)
+	qsort (v, c.cnt, sizeof (*v),
+	       (int (*) (const void *, const void *)) cmp);
+
+      *namelist = v;
+    }
+
+  __libc_cleanup_pop (0);
+
+  (void) __closedir (dp);
+  __set_errno (save);
 
+  return c.cnt;
+}
 compat_symbol (libc, __old_scandir64, scandir64, GLIBC_2_1);
 
 #endif
-- 
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