author | dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> |
Sat, 18 Feb 2023 04:11:30 +0000 | |
changeset 272 | e9ffa471eeb3 |
parent 262 | 8d3354485fc3 |
child 275 | 4a25a40d0c59 |
permissions | -rw-r--r-- |
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// Copyright 2018 The Go Authors. All rights reserved. |
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// Use of this source code is governed by a BSD-style |
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// license that can be found in the LICENSE file. |
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256 | 5 |
//go:build freebsd || netbsd |
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// +build freebsd netbsd |
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package unix |
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import ( |
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"strings" |
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"unsafe" |
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) |
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14 |
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// Derive extattr namespace and attribute name |
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func xattrnamespace(fullattr string) (ns int, attr string, err error) { |
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s := strings.IndexByte(fullattr, '.') |
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if s == -1 { |
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return -1, "", ENOATTR |
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} |
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namespace := fullattr[0:s] |
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attr = fullattr[s+1:] |
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switch namespace { |
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case "user": |
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return EXTATTR_NAMESPACE_USER, attr, nil |
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case "system": |
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return EXTATTR_NAMESPACE_SYSTEM, attr, nil |
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default: |
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return -1, "", ENOATTR |
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} |
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} |
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func initxattrdest(dest []byte, idx int) (d unsafe.Pointer) { |
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if len(dest) > idx { |
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return unsafe.Pointer(&dest[idx]) |
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} |
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Bump golang.org/x/net from 0.5.0 to 0.7.0
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if dest != nil { |
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// extattr_get_file and extattr_list_file treat NULL differently from |
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// a non-NULL pointer of length zero. Preserve the property of nilness, |
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// even if we can't use dest directly. |
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return unsafe.Pointer(&_zero) |
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} |
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return nil |
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} |
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// FreeBSD and NetBSD implement their own syscalls to handle extended attributes |
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50 |
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51 |
func Getxattr(file string, attr string, dest []byte) (sz int, err error) { |
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d := initxattrdest(dest, 0) |
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destsize := len(dest) |
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54 |
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nsid, a, err := xattrnamespace(attr) |
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if err != nil { |
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return -1, err |
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58 |
} |
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59 |
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60 |
return ExtattrGetFile(file, nsid, a, uintptr(d), destsize) |
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} |
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62 |
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63 |
func Fgetxattr(fd int, attr string, dest []byte) (sz int, err error) { |
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d := initxattrdest(dest, 0) |
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destsize := len(dest) |
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66 |
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67 |
nsid, a, err := xattrnamespace(attr) |
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68 |
if err != nil { |
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return -1, err |
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70 |
} |
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71 |
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72 |
return ExtattrGetFd(fd, nsid, a, uintptr(d), destsize) |
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73 |
} |
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74 |
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75 |
func Lgetxattr(link string, attr string, dest []byte) (sz int, err error) { |
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d := initxattrdest(dest, 0) |
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77 |
destsize := len(dest) |
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78 |
|
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79 |
nsid, a, err := xattrnamespace(attr) |
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80 |
if err != nil { |
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81 |
return -1, err |
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82 |
} |
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83 |
|
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84 |
return ExtattrGetLink(link, nsid, a, uintptr(d), destsize) |
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85 |
} |
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86 |
|
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87 |
// flags are unused on FreeBSD |
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88 |
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89 |
func Fsetxattr(fd int, attr string, data []byte, flags int) (err error) { |
251 | 90 |
var d unsafe.Pointer |
91 |
if len(data) > 0 { |
|
92 |
d = unsafe.Pointer(&data[0]) |
|
93 |
} |
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94 |
datasiz := len(data) |
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95 |
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96 |
nsid, a, err := xattrnamespace(attr) |
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97 |
if err != nil { |
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98 |
return |
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99 |
} |
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100 |
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101 |
_, err = ExtattrSetFd(fd, nsid, a, uintptr(d), datasiz) |
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102 |
return |
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103 |
} |
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104 |
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105 |
func Setxattr(file string, attr string, data []byte, flags int) (err error) { |
251 | 106 |
var d unsafe.Pointer |
107 |
if len(data) > 0 { |
|
108 |
d = unsafe.Pointer(&data[0]) |
|
109 |
} |
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110 |
datasiz := len(data) |
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111 |
|
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112 |
nsid, a, err := xattrnamespace(attr) |
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113 |
if err != nil { |
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114 |
return |
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115 |
} |
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116 |
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117 |
_, err = ExtattrSetFile(file, nsid, a, uintptr(d), datasiz) |
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118 |
return |
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119 |
} |
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120 |
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121 |
func Lsetxattr(link string, attr string, data []byte, flags int) (err error) { |
251 | 122 |
var d unsafe.Pointer |
123 |
if len(data) > 0 { |
|
124 |
d = unsafe.Pointer(&data[0]) |
|
125 |
} |
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126 |
datasiz := len(data) |
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127 |
|
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128 |
nsid, a, err := xattrnamespace(attr) |
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129 |
if err != nil { |
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130 |
return |
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131 |
} |
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132 |
|
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|
133 |
_, err = ExtattrSetLink(link, nsid, a, uintptr(d), datasiz) |
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|
134 |
return |
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|
135 |
} |
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changeset
|
136 |
|
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|
137 |
func Removexattr(file string, attr string) (err error) { |
2a9ec03fe5a1
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parents:
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changeset
|
138 |
nsid, a, err := xattrnamespace(attr) |
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parents:
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|
139 |
if err != nil { |
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|
140 |
return |
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changeset
|
141 |
} |
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changeset
|
142 |
|
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changeset
|
143 |
err = ExtattrDeleteFile(file, nsid, a) |
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|
144 |
return |
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changeset
|
145 |
} |
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parents:
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changeset
|
146 |
|
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|
147 |
func Fremovexattr(fd int, attr string) (err error) { |
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parents:
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changeset
|
148 |
nsid, a, err := xattrnamespace(attr) |
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parents:
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changeset
|
149 |
if err != nil { |
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changeset
|
150 |
return |
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parents:
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changeset
|
151 |
} |
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changeset
|
152 |
|
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changeset
|
153 |
err = ExtattrDeleteFd(fd, nsid, a) |
2a9ec03fe5a1
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changeset
|
154 |
return |
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parents:
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changeset
|
155 |
} |
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changeset
|
156 |
|
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Mikael Berthe <mikael@lilotux.net>
parents:
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changeset
|
157 |
func Lremovexattr(link string, attr string) (err error) { |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
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changeset
|
158 |
nsid, a, err := xattrnamespace(attr) |
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Mikael Berthe <mikael@lilotux.net>
parents:
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changeset
|
159 |
if err != nil { |
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changeset
|
160 |
return |
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changeset
|
161 |
} |
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changeset
|
162 |
|
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parents:
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|
163 |
err = ExtattrDeleteLink(link, nsid, a) |
2a9ec03fe5a1
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parents:
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changeset
|
164 |
return |
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changeset
|
165 |
} |
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parents:
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changeset
|
166 |
|
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Mikael Berthe <mikael@lilotux.net>
parents:
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changeset
|
167 |
func Listxattr(file string, dest []byte) (sz int, err error) { |
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parents:
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|
168 |
destsiz := len(dest) |
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parents:
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changeset
|
169 |
|
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Mikael Berthe <mikael@lilotux.net>
parents:
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changeset
|
170 |
// FreeBSD won't allow you to list xattrs from multiple namespaces |
262 | 171 |
s, pos := 0, 0 |
242
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changeset
|
172 |
for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { |
262 | 173 |
stmp, e := ListxattrNS(file, nsid, dest[pos:]) |
242
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parents:
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changeset
|
174 |
|
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changeset
|
175 |
/* Errors accessing system attrs are ignored so that |
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Use vendoring for backward compatibility
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parents:
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changeset
|
176 |
* we can implement the Linux-like behavior of omitting errors that |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
177 |
* we don't have read permissions on |
2a9ec03fe5a1
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parents:
diff
changeset
|
178 |
* |
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parents:
diff
changeset
|
179 |
* Linux will still error if we ask for user attributes on a file that |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
180 |
* we don't have read permissions on, so don't ignore those errors |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
181 |
*/ |
262 | 182 |
if e != nil { |
183 |
if e == EPERM && nsid != EXTATTR_NAMESPACE_USER { |
|
184 |
continue |
|
185 |
} |
|
242
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diff
changeset
|
186 |
return s, e |
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parents:
diff
changeset
|
187 |
} |
2a9ec03fe5a1
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Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
188 |
|
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Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
189 |
s += stmp |
262 | 190 |
pos = s |
191 |
if pos > destsiz { |
|
192 |
pos = destsiz |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
193 |
} |
262 | 194 |
} |
195 |
||
196 |
return s, nil |
|
197 |
} |
|
198 |
||
199 |
func ListxattrNS(file string, nsid int, dest []byte) (sz int, err error) { |
|
200 |
d := initxattrdest(dest, 0) |
|
201 |
destsiz := len(dest) |
|
202 |
||
203 |
s, e := ExtattrListFile(file, nsid, uintptr(d), destsiz) |
|
204 |
if e != nil { |
|
205 |
return 0, err |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
206 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
207 |
|
2a9ec03fe5a1
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Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
208 |
return s, nil |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
209 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
210 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
211 |
func Flistxattr(fd int, dest []byte) (sz int, err error) { |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
212 |
destsiz := len(dest) |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
213 |
|
262 | 214 |
s, pos := 0, 0 |
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
215 |
for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { |
262 | 216 |
stmp, e := FlistxattrNS(fd, nsid, dest[pos:]) |
217 |
||
218 |
if e != nil { |
|
219 |
if e == EPERM && nsid != EXTATTR_NAMESPACE_USER { |
|
220 |
continue |
|
221 |
} |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
222 |
return s, e |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
223 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
224 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
225 |
s += stmp |
262 | 226 |
pos = s |
227 |
if pos > destsiz { |
|
228 |
pos = destsiz |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
229 |
} |
262 | 230 |
} |
231 |
||
232 |
return s, nil |
|
233 |
} |
|
234 |
||
235 |
func FlistxattrNS(fd int, nsid int, dest []byte) (sz int, err error) { |
|
236 |
d := initxattrdest(dest, 0) |
|
237 |
destsiz := len(dest) |
|
238 |
||
239 |
s, e := ExtattrListFd(fd, nsid, uintptr(d), destsiz) |
|
240 |
if e != nil { |
|
241 |
return 0, err |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
242 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
243 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
244 |
return s, nil |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
245 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
246 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
247 |
func Llistxattr(link string, dest []byte) (sz int, err error) { |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
248 |
destsiz := len(dest) |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
249 |
|
262 | 250 |
s, pos := 0, 0 |
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
251 |
for _, nsid := range [...]int{EXTATTR_NAMESPACE_USER, EXTATTR_NAMESPACE_SYSTEM} { |
262 | 252 |
stmp, e := LlistxattrNS(link, nsid, dest[pos:]) |
253 |
||
254 |
if e != nil { |
|
255 |
if e == EPERM && nsid != EXTATTR_NAMESPACE_USER { |
|
256 |
continue |
|
257 |
} |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
258 |
return s, e |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
259 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
260 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
261 |
s += stmp |
262 | 262 |
pos = s |
263 |
if pos > destsiz { |
|
264 |
pos = destsiz |
|
242
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
265 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
266 |
} |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
267 |
|
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
268 |
return s, nil |
2a9ec03fe5a1
Use vendoring for backward compatibility
Mikael Berthe <mikael@lilotux.net>
parents:
diff
changeset
|
269 |
} |
262 | 270 |
|
271 |
func LlistxattrNS(link string, nsid int, dest []byte) (sz int, err error) { |
|
272 |
d := initxattrdest(dest, 0) |
|
273 |
destsiz := len(dest) |
|
274 |
||
275 |
s, e := ExtattrListLink(link, nsid, uintptr(d), destsiz) |
|
276 |
if e != nil { |
|
277 |
return 0, err |
|
278 |
} |
|
279 |
||
280 |
return s, nil |
|
281 |
} |