1 /* -*- buffer-read-only: t -*- vi: set ro: */
2 /* DO NOT EDIT! GENERATED AUTOMATICALLY! */
3 /* Work around unlinkat bugs on Solaris 9 and Hurd.
5 Copyright (C) 2009-2013 Free Software Foundation, Inc.
7 This program is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
20 /* Written by Eric Blake. */
40 /* unlinkat without AT_REMOVEDIR does not honor trailing / on Solaris
41 9. Solve it in a similar manner to unlink. Hurd has the same
45 rpl_unlinkat (int fd, char const *name, int flag)
49 /* rmdir behavior has no problems with trailing slash. */
50 if (flag & AT_REMOVEDIR)
51 return unlinkat (fd, name, flag);
54 if (len && ISSLASH (name[len - 1]))
56 /* See the lengthy comment in unlink.c why we disobey the POSIX
57 rule of letting unlink("link-to-dir/") attempt to unlink a
60 result = lstatat (fd, name, &st);
63 /* Trailing NUL will overwrite the trailing slash. */
64 char *short_name = malloc (len);
70 memcpy (short_name, name, len);
71 while (len && ISSLASH (short_name[len - 1]))
72 short_name[--len] = '\0';
73 if (len && (lstatat (fd, short_name, &st) || S_ISLNK (st.st_mode)))
83 result = unlinkat (fd, name, flag);
87 #else /* !HAVE_UNLINKAT */
89 /* Replacement for Solaris' function by the same name.
90 <http://www.google.com/search?q=unlinkat+site:docs.sun.com>
91 First, try to simulate it via (unlink|rmdir) ("/proc/self/fd/FD/FILE").
92 Failing that, simulate it via save_cwd/fchdir/(unlink|rmdir)/restore_cwd.
93 If either the save_cwd or the restore_cwd fails (relatively unlikely),
94 then give a diagnostic and exit nonzero.
95 Otherwise, this function works just like Solaris' unlinkat. */
97 # define AT_FUNC_NAME unlinkat
98 # define AT_FUNC_F1 rmdir
99 # define AT_FUNC_F2 unlink
100 # define AT_FUNC_USE_F1_COND AT_REMOVEDIR
101 # define AT_FUNC_POST_FILE_PARAM_DECLS , int flag
102 # define AT_FUNC_POST_FILE_ARGS /* empty */
103 # include "at-func.c"
107 # undef AT_FUNC_USE_F1_COND
108 # undef AT_FUNC_POST_FILE_PARAM_DECLS
109 # undef AT_FUNC_POST_FILE_ARGS
111 #endif /* !HAVE_UNLINKAT */