Commit | Line | Data |
---|---|---|
4db3c954 WD |
1 | This patch adds backward-compatibility support for the --acls option. |
2 | Since the main release has never had ACL support, the trunk doesn't | |
3 | need this code. If you want to make rsync 3.0.x communicate with an | |
4 | older (patched) release, use this. | |
5 | ||
03019e41 | 6 | To use this patch, run these commands for a successful build: |
fa26e11c | 7 | |
03019e41 | 8 | patch -p1 <patches/acls.diff |
4db3c954 | 9 | ./configure (optional if already run) |
fa26e11c WD |
10 | make |
11 | ||
9a7eef96 WD |
12 | --- old/acls.c |
13 | +++ new/acls.c | |
5795bf59 | 14 | @@ -89,6 +89,18 @@ static const char *str_acl_type(SMB_ACL_ |
4db3c954 WD |
15 | : "unknown SMB_ACL_TYPE_T"; |
16 | } | |
17 | ||
8db8e7d2 WD |
18 | +#define OTHER_TYPE(t) (SMB_ACL_TYPE_ACCESS+SMB_ACL_TYPE_DEFAULT-(t)) |
19 | +#define BUMP_TYPE(t) ((t = OTHER_TYPE(t)) == SMB_ACL_TYPE_DEFAULT) | |
fa26e11c | 20 | + |
4db3c954 | 21 | +static int old_count_racl_entries(const rsync_acl *racl) |
56294981 WD |
22 | +{ |
23 | + return racl->users.count + racl->groups.count | |
0870c22a WD |
24 | + + (racl->user_obj != NO_ENTRY) |
25 | + + (racl->group_obj != NO_ENTRY) | |
4db3c954 WD |
26 | + + (racl->mask_obj != NO_ENTRY) |
27 | + + (racl->other_obj != NO_ENTRY); | |
0870c22a WD |
28 | +} |
29 | + | |
4db3c954 WD |
30 | static int calc_sacl_entries(const rsync_acl *racl) |
31 | { | |
32 | /* A System ACL always gets user/group/other permission entries. */ | |
5795bf59 | 33 | @@ -544,6 +556,91 @@ int get_acl(const char *fname, statx *sx |
4db3c954 WD |
34 | return 0; |
35 | } | |
36 | ||
37 | +/* === OLD Send functions === */ | |
0870c22a WD |
38 | + |
39 | +/* Send the ida list over the file descriptor. */ | |
4db3c954 | 40 | +static void old_send_ida_entries(int f, const ida_entries *idal, char tag_char) |
0870c22a WD |
41 | +{ |
42 | + id_access *ida; | |
43 | + size_t count = idal->count; | |
44 | + for (ida = idal->idas; count--; ida++) { | |
45 | + write_byte(f, tag_char); | |
46 | + write_byte(f, ida->access); | |
47 | + write_int(f, ida->id); | |
0870c22a WD |
48 | + if (tag_char == 'U') |
49 | + add_uid(ida->id); | |
50 | + else | |
51 | + add_gid(ida->id); | |
fa26e11c | 52 | + } |
0870c22a WD |
53 | +} |
54 | + | |
adabede5 | 55 | +/* Send an rsync ACL over the file descriptor. */ |
4db3c954 | 56 | +static void old_send_rsync_acl(int f, const rsync_acl *racl) |
0870c22a | 57 | +{ |
4db3c954 | 58 | + size_t count = old_count_racl_entries(racl); |
0870c22a WD |
59 | + write_int(f, count); |
60 | + if (racl->user_obj != NO_ENTRY) { | |
61 | + write_byte(f, 'u'); | |
62 | + write_byte(f, racl->user_obj); | |
63 | + } | |
4db3c954 | 64 | + old_send_ida_entries(f, &racl->users, 'U'); |
0870c22a WD |
65 | + if (racl->group_obj != NO_ENTRY) { |
66 | + write_byte(f, 'g'); | |
67 | + write_byte(f, racl->group_obj); | |
fa26e11c | 68 | + } |
4db3c954 WD |
69 | + old_send_ida_entries(f, &racl->groups, 'G'); |
70 | + if (racl->mask_obj != NO_ENTRY) { | |
0870c22a | 71 | + write_byte(f, 'm'); |
4db3c954 | 72 | + write_byte(f, racl->mask_obj); |
0870c22a | 73 | + } |
4db3c954 | 74 | + if (racl->other_obj != NO_ENTRY) { |
0870c22a | 75 | + write_byte(f, 'o'); |
4db3c954 | 76 | + write_byte(f, racl->other_obj); |
0870c22a WD |
77 | + } |
78 | +} | |
c6437996 | 79 | + |
98ccc74a | 80 | +/* Send the ACL from the statx structure down the indicated file descriptor. |
0870c22a | 81 | + * This also frees the ACL data. */ |
4db3c954 | 82 | +void old_send_acl(statx *sxp, int f) |
0870c22a WD |
83 | +{ |
84 | + SMB_ACL_TYPE_T type; | |
85 | + rsync_acl *racl, *new_racl; | |
86 | + item_list *racl_list; | |
5d2612ca | 87 | + int ndx; |
53c1073a | 88 | + |
0870c22a WD |
89 | + type = SMB_ACL_TYPE_ACCESS; |
90 | + racl = sxp->acc_acl; | |
91 | + racl_list = &access_acl_list; | |
92 | + do { | |
5d2612ca WD |
93 | + if (!racl) { |
94 | + racl = new(rsync_acl); | |
95 | + if (!racl) | |
96 | + out_of_memory("send_acl"); | |
97 | + *racl = empty_rsync_acl; | |
98 | + if (type == SMB_ACL_TYPE_ACCESS) { | |
99 | + rsync_acl_fake_perms(racl, sxp->st.st_mode); | |
100 | + sxp->acc_acl = racl; | |
101 | + } else | |
102 | + sxp->def_acl = racl; | |
103 | + } | |
0870c22a | 104 | + |
4db3c954 | 105 | + if ((ndx = find_matching_rsync_acl(racl, type, racl_list)) != -1) { |
0870c22a WD |
106 | + write_byte(f, type == SMB_ACL_TYPE_ACCESS ? 'a' : 'd'); |
107 | + write_int(f, ndx); | |
0870c22a | 108 | + } else { |
645e162c | 109 | + new_racl = EXPAND_ITEM_LIST(racl_list, rsync_acl, 1000); |
0870c22a | 110 | + write_byte(f, type == SMB_ACL_TYPE_ACCESS ? 'A' : 'D'); |
4db3c954 | 111 | + old_send_rsync_acl(f, racl); |
0870c22a WD |
112 | + *new_racl = *racl; |
113 | + *racl = empty_rsync_acl; | |
114 | + } | |
115 | + racl = sxp->def_acl; | |
116 | + racl_list = &default_acl_list; | |
117 | + } while (BUMP_TYPE(type) && S_ISDIR(sxp->st.st_mode)); | |
118 | + | |
98ccc74a | 119 | + free_acl(sxp); |
fa26e11c WD |
120 | +} |
121 | + | |
4db3c954 WD |
122 | /* === Send functions === */ |
123 | ||
124 | /* The general strategy with the tag_type <-> character mapping is that | |
5795bf59 | 125 | @@ -630,6 +727,11 @@ static void send_rsync_acl(rsync_acl *ra |
4db3c954 WD |
126 | * This also frees the ACL data. */ |
127 | void send_acl(statx *sxp, int f) | |
128 | { | |
129 | + if (protocol_version < 30) { | |
130 | + old_send_acl(sxp, f); | |
131 | + return; | |
132 | + } | |
ffc18846 | 133 | + |
4db3c954 WD |
134 | if (!sxp->acc_acl) { |
135 | sxp->acc_acl = create_racl(); | |
ffc18846 | 136 | rsync_acl_fake_perms(sxp->acc_acl, sxp->st.st_mode); |
5795bf59 | 137 | @@ -647,6 +749,146 @@ void send_acl(statx *sxp, int f) |
4db3c954 WD |
138 | } |
139 | } | |
140 | ||
141 | +/* === OLD Receive functions */ | |
0870c22a | 142 | + |
4db3c954 | 143 | +static void old_recv_rsync_acl(rsync_acl *racl, int f) |
fa26e11c | 144 | +{ |
6250eb3e | 145 | + static item_list temp_ida_list = EMPTY_ITEM_LIST; |
0870c22a | 146 | + SMB_ACL_TAG_T tag_type = 0, prior_list_type = 0; |
090d78e1 | 147 | + uchar computed_mask_bits = 0; |
c6437996 | 148 | + id_access *ida; |
ad625644 WD |
149 | + size_t count; |
150 | + | |
151 | + if (!(count = read_int(f))) | |
fa26e11c | 152 | + return; |
ad625644 | 153 | + |
fa26e11c | 154 | + while (count--) { |
dfadc68a | 155 | + char tag = read_byte(f); |
c6437996 WD |
156 | + uchar access = read_byte(f); |
157 | + if (access & ~ (4 | 2 | 1)) { | |
4db3c954 | 158 | + rprintf(FERROR, "old_recv_rsync_acl: bogus permset %o\n", |
c6437996 WD |
159 | + access); |
160 | + exit_cleanup(RERR_STREAMIO); | |
161 | + } | |
fa26e11c WD |
162 | + switch (tag) { |
163 | + case 'u': | |
0870c22a | 164 | + if (racl->user_obj != NO_ENTRY) { |
4db3c954 | 165 | + rprintf(FERROR, "old_recv_rsync_acl: error: duplicate USER_OBJ entry\n"); |
c6437996 WD |
166 | + exit_cleanup(RERR_STREAMIO); |
167 | + } | |
168 | + racl->user_obj = access; | |
169 | + continue; | |
fa26e11c | 170 | + case 'U': |
0870c22a | 171 | + tag_type = SMB_ACL_USER; |
fa26e11c WD |
172 | + break; |
173 | + case 'g': | |
0870c22a | 174 | + if (racl->group_obj != NO_ENTRY) { |
4db3c954 | 175 | + rprintf(FERROR, "old_recv_rsync_acl: error: duplicate GROUP_OBJ entry\n"); |
c6437996 WD |
176 | + exit_cleanup(RERR_STREAMIO); |
177 | + } | |
178 | + racl->group_obj = access; | |
179 | + continue; | |
fa26e11c | 180 | + case 'G': |
0870c22a | 181 | + tag_type = SMB_ACL_GROUP; |
fa26e11c WD |
182 | + break; |
183 | + case 'm': | |
4db3c954 WD |
184 | + if (racl->mask_obj != NO_ENTRY) { |
185 | + rprintf(FERROR, "old_recv_rsync_acl: error: duplicate MASK entry\n"); | |
c6437996 WD |
186 | + exit_cleanup(RERR_STREAMIO); |
187 | + } | |
4db3c954 | 188 | + racl->mask_obj = access; |
c6437996 WD |
189 | + continue; |
190 | + case 'o': | |
4db3c954 WD |
191 | + if (racl->other_obj != NO_ENTRY) { |
192 | + rprintf(FERROR, "old_recv_rsync_acl: error: duplicate OTHER entry\n"); | |
c6437996 WD |
193 | + exit_cleanup(RERR_STREAMIO); |
194 | + } | |
4db3c954 | 195 | + racl->other_obj = access; |
c6437996 | 196 | + continue; |
fa26e11c | 197 | + default: |
4db3c954 | 198 | + rprintf(FERROR, "old_recv_rsync_acl: unknown tag %c\n", |
fa26e11c WD |
199 | + tag); |
200 | + exit_cleanup(RERR_STREAMIO); | |
201 | + } | |
0870c22a WD |
202 | + if (tag_type != prior_list_type) { |
203 | + if (prior_list_type) | |
4db3c954 | 204 | + save_idas(racl, prior_list_type, &temp_ida_list); |
0870c22a WD |
205 | + prior_list_type = tag_type; |
206 | + } | |
645e162c | 207 | + ida = EXPAND_ITEM_LIST(&temp_ida_list, id_access, -10); |
c6437996 WD |
208 | + ida->access = access; |
209 | + ida->id = read_int(f); | |
090d78e1 | 210 | + computed_mask_bits |= access; |
c6437996 | 211 | + } |
0870c22a | 212 | + if (prior_list_type) |
4db3c954 | 213 | + save_idas(racl, prior_list_type, &temp_ida_list); |
8eb3e3ae | 214 | + |
c6437996 | 215 | + if (!racl->users.count && !racl->groups.count) { |
8eb3e3ae | 216 | + /* If we received a superfluous mask, throw it away. */ |
4db3c954 | 217 | + if (racl->mask_obj != NO_ENTRY) { |
8eb3e3ae | 218 | + /* Mask off the group perms with it first. */ |
4db3c954 WD |
219 | + racl->group_obj &= racl->mask_obj | NO_ENTRY; |
220 | + racl->mask_obj = NO_ENTRY; | |
fa26e11c | 221 | + } |
4db3c954 WD |
222 | + } else if (racl->mask_obj == NO_ENTRY) /* Must be non-empty with lists. */ |
223 | + racl->mask_obj = computed_mask_bits | (racl->group_obj & 7); | |
fa26e11c WD |
224 | +} |
225 | + | |
0870c22a | 226 | +/* Receive the ACL info the sender has included for this file-list entry. */ |
4db3c954 | 227 | +void old_recv_acl(struct file_struct *file, int f) |
fa26e11c | 228 | +{ |
8db8e7d2 | 229 | + SMB_ACL_TYPE_T type; |
0870c22a | 230 | + item_list *racl_list; |
36aa3171 | 231 | + |
162234a7 | 232 | + if (S_ISLNK(file->mode)) |
fa26e11c | 233 | + return; |
36aa3171 | 234 | + |
8db8e7d2 | 235 | + type = SMB_ACL_TYPE_ACCESS; |
0870c22a | 236 | + racl_list = &access_acl_list; |
8db8e7d2 | 237 | + do { |
0870c22a WD |
238 | + char tag = read_byte(f); |
239 | + int ndx; | |
fa26e11c | 240 | + |
fa26e11c | 241 | + if (tag == 'A' || tag == 'a') { |
8db8e7d2 | 242 | + if (type != SMB_ACL_TYPE_ACCESS) { |
fa26e11c | 243 | + rprintf(FERROR, "receive_acl %s: duplicate access ACL\n", |
f4222aa5 | 244 | + f_name(file, NULL)); |
fa26e11c WD |
245 | + exit_cleanup(RERR_STREAMIO); |
246 | + } | |
247 | + } else if (tag == 'D' || tag == 'd') { | |
8db8e7d2 | 248 | + if (type == SMB_ACL_TYPE_ACCESS) { |
fa26e11c | 249 | + rprintf(FERROR, "receive_acl %s: expecting access ACL; got default\n", |
f4222aa5 | 250 | + f_name(file, NULL)); |
fa26e11c WD |
251 | + exit_cleanup(RERR_STREAMIO); |
252 | + } | |
253 | + } else { | |
254 | + rprintf(FERROR, "receive_acl %s: unknown ACL type tag: %c\n", | |
f4222aa5 | 255 | + f_name(file, NULL), tag); |
fa26e11c WD |
256 | + exit_cleanup(RERR_STREAMIO); |
257 | + } | |
258 | + if (tag == 'A' || tag == 'D') { | |
0870c22a WD |
259 | + acl_duo *duo_item; |
260 | + ndx = racl_list->count; | |
645e162c | 261 | + duo_item = EXPAND_ITEM_LIST(racl_list, acl_duo, 1000); |
b6c2bb12 | 262 | + duo_item->racl = empty_rsync_acl; |
4db3c954 | 263 | + old_recv_rsync_acl(&duo_item->racl, f); |
0870c22a | 264 | + duo_item->sacl = NULL; |
fa26e11c | 265 | + } else { |
0870c22a | 266 | + ndx = read_int(f); |
d4531ffb | 267 | + if (ndx < 0 || (size_t)ndx >= racl_list->count) { |
fa26e11c | 268 | + rprintf(FERROR, "receive_acl %s: %s ACL index %d out of range\n", |
0870c22a | 269 | + f_name(file, NULL), str_acl_type(type), ndx); |
fa26e11c WD |
270 | + exit_cleanup(RERR_STREAMIO); |
271 | + } | |
fa26e11c | 272 | + } |
70891d26 WD |
273 | + if (type == SMB_ACL_TYPE_ACCESS) |
274 | + F_ACL(file) = ndx; | |
275 | + else | |
81ecd8e0 | 276 | + F_DEF_ACL(file) = ndx; |
0870c22a | 277 | + racl_list = &default_acl_list; |
8db8e7d2 | 278 | + } while (BUMP_TYPE(type) && S_ISDIR(file->mode)); |
fa26e11c WD |
279 | +} |
280 | + | |
4db3c954 WD |
281 | /* === Receive functions === */ |
282 | ||
283 | static uchar recv_acl_access(uchar *name_follows_val, int f) | |
5795bf59 | 284 | @@ -766,6 +1008,11 @@ static int recv_rsync_acl(item_list *rac |
4db3c954 WD |
285 | /* Receive the ACL info the sender has included for this file-list entry. */ |
286 | void receive_acl(struct file_struct *file, int f) | |
287 | { | |
288 | + if (protocol_version < 30) { | |
289 | + old_recv_acl(file, f); | |
5d2612ca | 290 | + return; |
fa26e11c | 291 | + } |
fa26e11c | 292 | + |
4db3c954 | 293 | F_ACL(file) = recv_rsync_acl(&access_acl_list, SMB_ACL_TYPE_ACCESS, f); |
34a409bc | 294 | |
4db3c954 WD |
295 | if (S_ISDIR(file->mode)) |
296 | --- old/compat.c | |
297 | +++ new/compat.c | |
5795bf59 | 298 | @@ -115,13 +115,6 @@ void setup_protocol(int f_out,int f_in) |
4db3c954 WD |
299 | protocol_version); |
300 | exit_cleanup(RERR_PROTOCOL); | |
0870c22a | 301 | } |
8a38e00a | 302 | - if (preserve_acls && !local_server) { |
4db3c954 WD |
303 | - rprintf(FERROR, |
304 | - "--acls requires protocol 30 or higher" | |
305 | - " (negotiated %d).\n", | |
306 | - protocol_version); | |
307 | - exit_cleanup(RERR_PROTOCOL); | |
308 | - } | |
8a38e00a | 309 | if (preserve_xattrs && !local_server) { |
5795bf59 WD |
310 | rprintf(FERROR, |
311 | "--xattrs requires protocol 30 or higher" |