1 // -*- C++ -*-
2 /* Copyright (C) 2005-2018 Free Software Foundation, Inc.
3      Written by Werner Lemberg (wl@gnu.org)
4 
5 This file is part of groff.
6 
7 groff is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
11 
12 groff is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15 for more details.
16 
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/>. */
19 
20 /* path_name_max(dir) does the same as pathconf(dir, _PC_PATH_MAX) */
21 
22 #include "lib.h"
23 
24 #include <sys/types.h>
25 
26 #ifdef HAVE_UNISTD_H
27 #include <unistd.h>
28 #endif /* HAVE_UNISTD_H */
29 
30 #ifdef _POSIX_VERSION
31 
path_name_max()32 size_t path_name_max()
33 {
34   return pathconf("/", _PC_PATH_MAX) < 1 ? 1024 : pathconf("/",_PC_PATH_MAX);
35 }
36 
37 #else /* not _POSIX_VERSION */
38 
39 #include <stdlib.h>
40 
41 #ifdef HAVE_DIRENT_H
42 # include <dirent.h>
43 #else /* not HAVE_DIRENT_H */
44 # ifdef HAVE_SYS_DIR_H
45 #  include <sys/dir.h>
46 # endif /* HAVE_SYS_DIR_H */
47 #endif /* not HAVE_DIRENT_H */
48 
49 #ifndef PATH_MAX
50 # ifdef MAXPATHLEN
51 #  define PATH_MAX MAXPATHLEN
52 # else /* !MAXPATHLEN */
53 #  ifdef MAX_PATH
54 #   define PATH_MAX MAX_PATH
55 #  else /* !MAX_PATH */
56 #   ifdef _MAX_PATH
57 #    define PATH_MAX _MAX_PATH
58 #   else /* !_MAX_PATH */
59 #    define PATH_MAX 255
60 #   endif /* !_MAX_PATH */
61 #  endif /* !MAX_PATH */
62 # endif /* !MAXPATHLEN */
63 #endif /* !PATH_MAX */
64 
path_name_max()65 size_t path_name_max()
66 {
67   return PATH_MAX;
68 }
69 
70 #endif /* not _POSIX_VERSION */
71