--- /dev/null
+/* A rename wrapper to make tools like mv -- that would normally rely
+ on the underlying rename syscall -- work more consistently.
+ On at least NetBSD 1.6, `rename ("dir", "B/")' fails when B doesn't
+ exist, whereas it succeeds on Linux-2.6.x and Solaris 10. This wrapper
+ provides an interface for systems like the former so that the tools
+ (namely mv) relying on the rename syscall have more consistent
+ semantics.
+
+ Copyright (C) 2006 Free Software Foundation, Inc.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program 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 General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+/* written by Jim Meyering */
+
+#include <config.h>
+#undef rename
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "dirname.h"
+#include "xalloc.h"
+
+static inline bool
+has_trailing_slash (char const *file, size_t len)
+{
+ /* Don't count "/" as having a trailing slash. */
+ if (len <= 1)
+ return false;
+
+ char last = file[len - 1];
+ return ISSLASH (last);
+}
+
+/* This is a rename wrapper for systems where the rename syscall
+ works differently than desired when SRC is a directory and DST does
+ not exist but is specified with a trailing slash. On NetBSD 6.1,
+ rename fails in that case. On Linux and Solaris systems, it succeeds.
+ This wrapper makes it succeed on NetBSD by running the originally
+ requested rename, and if it fails due to the above scenario, calling
+ it again with DST's trailing slashes removed. */
+int
+rpl_rename_dest_slash (char const *src, char const *dst)
+{
+ size_t d_len;
+ int ret_val = rename (src, dst);
+ if (ret_val == 0 || errno != ENOENT)
+ return ret_val;
+
+ {
+ /* Fail now, unless SRC is a directory. */
+ struct stat sb;
+ if (lstat (src, &sb) != 0 || ! S_ISDIR (sb.st_mode))
+ return ret_val;
+ }
+
+ /* Don't call rename again if there are no trailing slashes. */
+ d_len = strlen (dst);
+ if ( ! has_trailing_slash (dst, d_len))
+ return ret_val;
+
+ {
+ char *dst_temp;
+ dst_temp = xmemdup (dst, d_len + 1);
+ strip_trailing_slashes (dst_temp);
+
+ ret_val = rename (src, dst_temp);
+ free (dst_temp);
+ }
+
+ return ret_val;
+}
--- /dev/null
+#serial 1
+
+# Copyright (C) 2006 Free Software Foundation, Inc.
+# This file is free software; the Free Software Foundation
+# gives unlimited permission to copy and/or distribute it,
+# with or without modifications, as long as this notice is preserved.
+
+# Derived from rename.m4.
+
+# A rename wrapper to make tools like mv -- that would normally
+# rely on the underlying rename syscall -- work more consistently.
+
+AC_DEFUN([gl_FUNC_RENAME_TRAILING_DEST_SLASH],
+[
+ AC_CACHE_CHECK([whether rename is broken with respect to destintation slashes],
+ gl_cv_func_rename_trailing_dest_slash_bug,
+ [
+ rm -rf conftest.d1 conftest.d2
+ mkdir conftest.d1 ||
+ AC_MSG_ERROR([cannot create temporary directory])
+ AC_TRY_RUN([
+# include <stdio.h>
+ int
+ main ()
+ {
+ return (rename ("conftest.d1", "conftest.d2/") ? 1 : 0);
+ }
+ ],
+ gl_cv_func_rename_trailing_dest_slash_bug=no,
+ gl_cv_func_rename_trailing_dest_slash_bug=yes,
+ dnl When crosscompiling, assume rename is broken.
+ gl_cv_func_rename_trailing_dest_slash_bug=yes)
+
+ rm -rf conftest.d1 conftest.d2
+ ])
+ if test $gl_cv_func_rename_trailing_dest_slash_bug = yes; then
+ AC_LIBOBJ(rename-dest-slash)
+ AC_DEFINE(rename, rpl_rename_dest_slash,
+ [Define to rpl_rename_dest_slash if the replacement function should be used.])
+ fi
+])
projects / pspp / commitdiff