Update from coreutils. * lib/__fpending.h: Add copyright notice. * lib/fprintftime.h: Likewise. * lib/savedir.c: Use (C) in copyright notice. * lib/savedir.h: Likewise. 2006-08-15 Jim Meyering <jim@meyering.net> * lib/at-func.c: New file, with the logic of all emulated at-functions. * lib/openat-priv.h: Include <errno.h> and define ENOSYS, in support of the EXPECTED_ERRNO macro. * lib/openat.c (fstatat, unlinkat, fchownat): Remove function definitions. Instead, define the appropriate symbols and include "at-func.c". * lib/mkdirat.c (mkdirat): Likewise. * lib/fchmodat.c (fchmodat): Likewise. (ENOSYS): Remove definition. * lib/openat.c: Don't include <errno.h>, now that "openat-priv.h" does it. Don't include "unistd--.h" -- it wasn't ever used. 2006-01-17 Jim Meyering <jim@meyering.net> Rewrite fts.c not to change the current working directory, by using openat, fstatat, fdopendir, etc.. * lib/fts.c [! _LIBC]: Include "openat.h" and "unistd--.h". (HAVE_OPENAT_SUPPORT): Define. [_LIBC] (fchdir): Don't undef or define; no longer used. (FCHDIR): Define in terms of cwd_advance_fd rather than fchdir. Now, this `function' always succeeds, and consumes its file descriptor parameter -- so callers must not close such FDs. Update callers. (diropen_fd, opendirat, cwd_advance_fd): New functions. (diropen): Add parameter, SP. Adjust all callers. Implement using diropen_fd, rather than open. (fts_open): Initialize new member, fts_cwd_fd. Remove fts_rft-setting code. (fts_close): Close fts_cwd_fd, if necessary. (__opendir2): Define in terms of opendir or opendirat, depending on whether the FST_NOCHDIR flag is set. (fts_build): Since fts_safe_changedir consumes its FD, and since this code must do `closedir(dirp)', dup the dirfd(dirp) argument, and close the dup'd file descriptor upon failure. (fts_stat): Use fstatat(...AT_SYMLINK_NOFOLLOW) in place of lstat. (fts_safe_changedir): Tweak semantics to reflect that this function now calls cwd_advance_fd and hence consumes its FD argument. * lib/fts_.h [struct FTS] (fts_cwd_fd): New member. [struct FTS] (fts_rft): Remove now-unused member. [struct FTS] (fts_cycle.state): Improve comment. * lib/openat.c (openat_needs_fchdir): New function. * lib/openat.h (openat_needs_fchdir): Declare it. 2006-08-15 Jim Meyering <jim@meyering.net> * m4/openat.m4 (gl_FUNC_OPENAT): Add at-func.c via AC_LIBSOURCES. 2006-01-17 Jim Meyering <jim@meyering.net> * m4/fts.m4 (gl_FUNC_FTS_CORE): Depend on gl_FUNC_OPENAT. 2006-01-11 Jim Meyering <jim@meyering.net> * m4/openat.m4 (gl_FUNC_OPENAT): Require and compile fchmodat.c. Check for the lchmod function.

+
−/* Define an at-style functions like fstatat, unlinkat, fchownat, etc.
+
−   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 */
+
−
+
−#define CALL_FUNC(F)				\
+
−  (AT_FUNC_USE_F1_COND				\
+
−    ? AT_FUNC_F1 (F AT_FUNC_POST_FILE_ARGS)	\
+
−    : AT_FUNC_F2 (F AT_FUNC_POST_FILE_ARGS))
+
−
+
−/* Call AT_FUNC_F1 or AT_FUNC_F2 (testing AT_FUNC_USE_F1_COND to
+
−   determine which) to operate on FILE, which is in the directory
+
−   open on descriptor FD.  If possible, do it without changing the
+
−   working directory.  Otherwise, resort to using save_cwd/fchdir,
+
−   then AT_FUNC_F?/restore_cwd.  If either the save_cwd or the restore_cwd
+
−   fails, then give a diagnostic and exit nonzero.  */
+
−int
+
−AT_FUNC_NAME (int fd, char const *file AT_FUNC_POST_FILE_PARAM_DECLS)
+
−{
+
−  struct saved_cwd saved_cwd;
+
−  int saved_errno;
+
−  int err;
+
−
+
−  if (fd == AT_FDCWD || IS_ABSOLUTE_FILE_NAME (file))
+
−    return CALL_FUNC (file);
+
−
+
−  {
+
−    char *proc_file;
+
−    BUILD_PROC_NAME (proc_file, fd, file);
+
−    err = CALL_FUNC (proc_file);
+
−    /* If the syscall succeeds, or if it fails with an unexpected
+
−       errno value, then return right away.  Otherwise, fall through
+
−       and resort to using save_cwd/restore_cwd.  */
+
−    if (0 <= err || ! EXPECTED_ERRNO (errno))
+
−      return err;
+
−  }
+
−
+
−  if (save_cwd (&saved_cwd) != 0)
+
−    openat_save_fail (errno);
+
−
+
−  if (fchdir (fd) != 0)
+
−    {
+
−      saved_errno = errno;
+
−      free_cwd (&saved_cwd);
+
−      errno = saved_errno;
+
−      return -1;
+
−    }
+
−
+
−  err = CALL_FUNC (file);
+
−  saved_errno = (err < 0 ? errno : 0);
+
−
+
−  if (restore_cwd (&saved_cwd) != 0)
+
−    openat_restore_fail (errno);
+
−
+
−  free_cwd (&saved_cwd);
+
−
+
−  if (saved_errno)
+
−    errno = saved_errno;
+
−  return err;
+
−}
+
−#undef CALL_FUNC