Migration (without history) of the current stable line to subversion.

svn path=/main/branches/2.0/; revision=1941

1 files changed, 194 insertions, 0 deletions

diff --git a/src/sandbox-dev/canonicalize.c b/src/sandbox-dev/canonicalize.c
new file mode 100644
index 000000000..7ecd57ec6
--- /dev/null
+++ b/src/sandbox-dev/canonicalize.c
@@ -0,0 +1,194 @@
+/* Return the canonical absolute name of a given file.
+   Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/*
+ * $Header: /var/cvsroot/gentoo-src/portage/src/sandbox-dev/Attic/canonicalize.c,v 1.2 2002/08/26 03:28:30 azarah Exp $
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <limits.h>
+#include <sys/param.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <stddef.h>
+                     
+#ifndef __set_errno
+# define __set_errno(val) errno = (val)
+#endif
+
+/* Return the canonical absolute name of file NAME.  A canonical name
+   does not contain any `.', `..' components nor any repeated path
+   separators ('/') or symlinks.  All path components must exist.  If
+   RESOLVED is null, the result is malloc'd; otherwise, if the
+   canonical name is PATH_MAX chars or more, returns null with `errno'
+   set to ENAMETOOLONG; if the name fits in fewer than PATH_MAX chars,
+   returns the name in RESOLVED.  If the name cannot be resolved and
+   RESOLVED is non-NULL, it contains the path of the first component
+   that cannot be resolved.  If the path can be resolved, RESOLVED
+   holds the same value as the value returned.  */
+
+/* Modified: 19 Aug 2002; Martin Schlemmer <azarah@gentoo.org>
+ * 
+ *  Cleaned up unneeded stuff, and change so that it will not
+ *  resolve symlinks.  Also prepended a 'e' to functions that
+ *  I did not rip out.
+ *  
+ */
+
+static char *
+ecanonicalize (const char *name, char *resolved)
+{
+  char *rpath, *dest;
+  const char *start, *end, *rpath_limit;
+  long int path_max;
+
+  if (name == NULL)
+    {
+      /* As per Single Unix Specification V2 we must return an error if
+         either parameter is a null pointer.  We extend this to allow
+         the RESOLVED parameter to be NULL in case the we are expected to
+         allocate the room for the return value.  */
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  if (name[0] == '\0')
+    {
+      /* As per Single Unix Specification V2 we must return an error if
+         the name argument points to an empty string.  */
+      __set_errno (ENOENT);
+      return NULL;
+    }
+
+#ifdef PATH_MAX
+  path_max = PATH_MAX;
+#else
+  path_max = pathconf (name, _PC_PATH_MAX);
+  if (path_max <= 0)
+    path_max = 1024;
+#endif
+
+  rpath = resolved ? alloca (path_max) : malloc (path_max);
+  rpath_limit = rpath + path_max;
+
+  if (name[0] != '/')
+    {
+      if (!getcwd (rpath, path_max))
+        {
+          rpath[0] = '\0';
+          goto error;
+        }
+      dest = strchr (rpath, '\0');
+    }
+  else
+    {
+      rpath[0] = '/';
+      dest = rpath + 1;
+    }
+
+  for (start = end = name; *start; start = end)
+    {
+      /* Skip sequence of multiple path-separators.  */
+      while (*start == '/')
+        ++start;
+
+      /* Find end of path component.  */
+      for (end = start; *end && *end != '/'; ++end)
+        /* Nothing.  */;
+
+      if (end - start == 0)
+        break;
+      else if (end - start == 1 && start[0] == '.')
+        /* nothing */;
+      else if (end - start == 2 && start[0] == '.' && start[1] == '.')
+        {
+          /* Back up to previous component, ignore if at root already.  */
+          if (dest > rpath + 1)
+            while ((--dest)[-1] != '/');
+        }
+      else
+        {
+          size_t new_size;
+
+          if (dest[-1] != '/')
+            *dest++ = '/';
+
+          if (dest + (end - start) >= rpath_limit)
+            {
+              ptrdiff_t dest_offset = dest - rpath;
+
+              if (resolved)
+                {
+                  __set_errno (ENAMETOOLONG);
+                  if (dest > rpath + 1)
+                    dest--;
+                  *dest = '\0';
+                  goto error;
+                }
+              new_size = rpath_limit - rpath;
+              if (end - start + 1 > path_max)
+                new_size += end - start + 1;
+              else
+                new_size += path_max;
+              rpath = realloc (rpath, new_size);
+              rpath_limit = rpath + new_size;
+              if (rpath == NULL)
+                return NULL;
+
+              dest = rpath + dest_offset;
+            }
+
+          dest = __mempcpy (dest, start, end - start);
+          *dest = '\0';
+
+          }
+    }
+#if 0
+  if (dest > rpath + 1 && dest[-1] == '/')
+    --dest;
+#endif
+  *dest = '\0';
+
+  return resolved ? memcpy (resolved, rpath, dest - rpath + 1) : rpath;
+
+error:
+  if (resolved)
+    strcpy (resolved, rpath);
+  else
+    free (rpath);
+  return NULL;
+}
+
+
+char *
+erealpath (const char *name, char *resolved)
+{
+  if (resolved == NULL)
+    {
+      __set_errno (EINVAL);
+      return NULL;
+    }
+
+  return ecanonicalize (name, resolved);
+}
+
+
+// vim:expandtab noai:cindent ai