1 /* savedir.c -- save the list of files in a directory in a string
3 Copyright 1990, 1997, 1998, 1999, 2000, 2001, 2003, 2004, 2005 Free
4 Software Foundation, Inc.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software Foundation,
18 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
20 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
28 #include <sys/types.h>
35 # define dirent direct
37 # include <sys/ndir.h>
48 /* Fake a return value. */
49 # define CLOSEDIR(d) (closedir (d), 0)
51 # define CLOSEDIR(d) closedir (d)
61 #ifndef NAME_SIZE_DEFAULT
62 # define NAME_SIZE_DEFAULT 512
65 /* Return a freshly allocated string containing the file names
66 in directory DIRP, separated by '\0' characters;
67 the end is marked by two '\0' characters in a row.
68 Return NULL (setting errno) if DIRP cannot be read or closed.
69 If DIRP is NULL, return NULL without affecting errno. */
72 savedirstream (DIR *dirp)
75 size_t allocated = NAME_SIZE_DEFAULT;
82 name_space = xmalloc (allocated);
86 struct dirent const *dp;
94 /* Skip "", ".", and "..". "" is returned by at least one buggy
95 implementation: Solaris 2.4 readdir on NFS file systems. */
97 if (entry[entry[0] != '.' ? 0 : entry[1] != '.' ? 1 : 2] != '\0')
99 size_t entry_size = strlen (entry) + 1;
100 if (used + entry_size < used)
102 if (allocated <= used + entry_size)
106 if (2 * allocated < allocated)
110 while (allocated <= used + entry_size);
112 name_space = xrealloc (name_space, allocated);
114 memcpy (name_space + used, entry, entry_size);
118 name_space[used] = '\0';
120 if (CLOSEDIR (dirp) != 0)
131 /* Return a freshly allocated string containing the file names
132 in directory DIR, separated by '\0' characters;
133 the end is marked by two '\0' characters in a row.
134 Return NULL (setting errno) if DIR cannot be opened, read, or closed. */
137 savedir (char const *dir)
139 return savedirstream (opendir (dir));
142 /* Return a freshly allocated string containing the file names
143 in directory FD, separated by '\0' characters;
144 the end is marked by two '\0' characters in a row.
145 Return NULL (setting errno) if FD cannot be read or closed. */
150 return savedirstream (fdopendir (fd));