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Dogcows Code - chaz/tar/blob - lib/savedir.c
1 /* savedir.c -- save the list of files in a directory in a string
3 Copyright 1990, 1997, 1998, 1999, 2000, 2001 Free Software
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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 /* Written by David MacKenzie <djm@gnu.ai.mit.edu>. */
26 #include <sys/types.h>
36 # define dirent direct
38 # include <sys/ndir.h>
49 /* Fake a return value. */
50 # define CLOSEDIR(d) (closedir (d), 0)
52 # define CLOSEDIR(d) closedir (d)
66 /* Return a freshly allocated string containing the filenames
67 in directory DIR, separated by '\0' characters;
68 the end is marked by two '\0' characters in a row.
69 Return NULL (setting errno) if DIR cannot be opened, read, or closed. */
71 #ifndef NAME_SIZE_DEFAULT
72 # define NAME_SIZE_DEFAULT 512
76 savedir (const char *dir
)
81 size_t allocated
= NAME_SIZE_DEFAULT
;
89 name_space
= xmalloc (allocated
);
92 while ((dp
= readdir (dirp
)) != NULL
)
94 /* Skip "", ".", and "..". "" is returned by at least one buggy
95 implementation: Solaris 2.4 readdir on NFS filesystems. */
96 char const *entry
= dp
->d_name
;
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)
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