/* provide a replacement openat function
- Copyright (C) 2004 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005 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
errno = saved_errno;
return new_fd;
}
+
+/* Replacement for Solaris' function by the same name.
+ <http://www.google.com/search?q=fdopendir+site:docs.sun.com>
+ Simulate it by doing save_cwd/fchdir/opendir(".")/restore_cwd.
+ If either the save_cwd or the restore_cwd fails (relatively unlikely,
+ and usually indicative of a problem that deserves close attention),
+ then give a diagnostic and exit nonzero.
+ Otherwise, this function works just like Solaris' fdopendir. */
+DIR *
+fdopendir (int fd)
+{
+ struct saved_cwd saved_cwd;
+ int saved_errno;
+ DIR *dir;
+
+ if (fd == AT_FDCWD)
+ return opendir (".");
+
+ if (save_cwd (&saved_cwd) != 0)
+ error (exit_failure, errno,
+ _("fdopendir: unable to record current working directory"));
+
+ if (fchdir (fd) != 0)
+ {
+ saved_errno = errno;
+ free_cwd (&saved_cwd);
+ errno = saved_errno;
+ return NULL;
+ }
+
+ dir = opendir (".");
+ saved_errno = errno;
+
+ if (restore_cwd (&saved_cwd) != 0)
+ error (exit_failure, errno,
+ _("fdopendir: unable to restore working directory"));
+
+ free_cwd (&saved_cwd);
+
+ errno = saved_errno;
+ return dir;
+}
+
+/* Replacement for Solaris' function by the same name.
+ <http://www.google.com/search?q=fstatat+site:docs.sun.com>
+ Simulate it by doing save_cwd/fchdir/(stat|lstat)/restore_cwd.
+ If either the save_cwd or the restore_cwd fails (relatively unlikely,
+ and usually indicative of a problem that deserves close attention),
+ then give a diagnostic and exit nonzero.
+ Otherwise, this function works just like Solaris' fstatat. */
+int
+fstatat (int fd, char const *filename, struct stat *st, int flag)
+{
+ struct saved_cwd saved_cwd;
+ int saved_errno;
+ int err;
+
+ if (fd == AT_FDCWD)
+ return (flag == AT_SYMLINK_NOFOLLOW
+ ? lstat (filename, st)
+ : stat (filename, st));
+
+ if (save_cwd (&saved_cwd) != 0)
+ error (exit_failure, errno,
+ _("fstatat: unable to record current working directory"));
+
+ if (fchdir (fd) != 0)
+ {
+ saved_errno = errno;
+ free_cwd (&saved_cwd);
+ errno = saved_errno;
+ return -1;
+ }
+
+ err = (flag == AT_SYMLINK_NOFOLLOW
+ ? lstat (filename, st)
+ : stat (filename, st));
+ saved_errno = errno;
+
+ if (restore_cwd (&saved_cwd) != 0)
+ error (exit_failure, errno,
+ _("fstatat: unable to restore working directory"));
+
+ free_cwd (&saved_cwd);
+
+ errno = saved_errno;
+ return err;
+}