1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/* Copyright (C) 2002 Andreas Gruenbacher <agruen@suse.de>, SuSE Linux AG.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Copy extended attributes between files. */
#if defined (HAVE_CONFIG_H)
#include "config.h"
#endif
#include <sys/types.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#if defined(HAVE_ALLOCA_H)
# include <alloca.h>
#endif
#if defined(HAVE_ATTR_XATTR_H)
# include <attr/xattr.h>
#endif
#if defined(HAVE_ATTR_LIBATTR_H)
# include "attr/libattr.h"
#endif
#define ERROR_CONTEXT_MACROS
#include "error_context.h"
#if !defined(ENOTSUP)
# define ENOTSUP (-1)
#endif
#if defined(HAVE_ALLOCA)
# define my_alloc(size) alloca (size)
# define my_free(ptr) do { } while(0)
#else
# define my_alloc(size) malloc (size)
# define my_free(ptr) free (ptr)
#endif
/* Copy extended attributes from src_path to dst_path. If the file
has an extended Access ACL (system.posix_acl_access) and that is
copied successfully, the file mode permission bits are copied as
a side effect. This may not always the case, so the file mode
and/or ownership must be copied separately. */
int
attr_copy_fd(const char *src_path, int src_fd,
const char *dst_path, int dst_fd,
int (*check) (const char *, struct error_context *),
struct error_context *ctx)
{
#if defined(HAVE_FLISTXATTR) && defined(HAVE_FGETXATTR) && \
defined(HAVE_FSETXATTR)
int ret = 0;
ssize_t size;
char *names = NULL, *end_names, *name, *value = NULL;
unsigned int setxattr_ENOTSUP = 0;
/* ignore acls by default */
if (check == NULL)
check = attr_copy_check_permissions;
size = flistxattr (src_fd, NULL, 0);
if (size < 0) {
if (errno != ENOSYS && errno != ENOTSUP) {
const char *qpath = quote (ctx, src_path);
error (ctx, _("listing attributes of %s"), qpath);
quote_free (ctx, qpath);
ret = -1;
}
goto getout;
}
names = (char *) my_alloc (size+1);
if (names == NULL) {
error (ctx, "");
ret = -1;
goto getout;
}
size = flistxattr (src_fd, names, size);
if (size < 0) {
const char *qpath = quote (ctx, src_path);
error (ctx, _("listing attributes of %s"), qpath);
quote_free (ctx, qpath);
ret = -1;
goto getout;
} else {
names[size] = '\0';
end_names = names + size;
}
for (name = names; name != end_names; name = strchr(name, '\0') + 1) {
void *old_value;
/* check if this attribute shall be preserved */
if (!*name || !check(name, ctx))
continue;
size = fgetxattr (src_fd, name, NULL, 0);
if (size < 0) {
const char *qpath = quote (ctx, src_path);
const char *qname = quote (ctx, name);
error (ctx, _("getting attribute %s of %s"),
qpath, qname);
quote_free (ctx, qname);
quote_free (ctx, qpath);
ret = -1;
continue;
}
value = (char *) realloc (old_value = value, size);
if (size != 0 && value == NULL) {
free(old_value);
error (ctx, "");
ret = -1;
}
size = fgetxattr (src_fd, name, value, size);
if (size < 0) {
const char *qpath = quote (ctx, src_path);
const char *qname = quote (ctx, name);
error (ctx, _("getting attribute %s of %s"),
qname, qpath);
quote_free (ctx, qname);
quote_free (ctx, qpath);
ret = -1;
continue;
}
if (fsetxattr (dst_fd, name, value, size, 0) != 0) {
if (errno == ENOTSUP)
setxattr_ENOTSUP++;
else {
const char *qpath = quote (ctx, dst_path);
if (errno == ENOSYS) {
error (ctx, _("setting attributes for "
"%s"), qpath);
ret = -1;
break; /* no hope of getting any further */
} else {
const char *qname = quote (ctx, name);
error (ctx, _("setting attribute %s for %s"),
qname, qpath);
quote_free (ctx, qname);
ret = -1;
}
quote_free (ctx, qpath);
}
}
}
if (setxattr_ENOTSUP) {
const char *qpath = quote (ctx, dst_path);
errno = ENOTSUP;
error (ctx, _("setting attributes for %s"), qpath);
ret = -1;
quote_free (ctx, qpath);
}
getout:
free (value);
my_free (names);
return ret;
#else
return 0;
#endif
}
|
