2 Copyright (c) 2010 Frank Lahm <franklahm@gmail.com>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
17 #endif /* HAVE_CONFIG_H */
19 #ifdef HAVE_SOLARIS_ACLS
22 #include <sys/types.h>
31 #include <atalk/logger.h>
32 #include <atalk/afp.h>
33 #include <atalk/util.h>
34 #include <atalk/acl.h>
36 /* Get ACL. Allocates storage as needed. Caller must free.
37 * Returns no of ACEs or -1 on error. */
38 int get_nfsv4_acl(const char *name, ace_t **retAces)
45 /* Only call acl() for regular files and directories, otherwise just return 0 */
46 if (lstat(name, &st) != 0) {
47 LOG(log_warning, logtype_afpd, "get_nfsv4_acl(\"%s/%s\"): %s", getcwdpath(), name, strerror(errno));
51 if (S_ISLNK(st.st_mode))
52 /* sorry, no ACLs for symlinks */
55 if ( ! ((S_ISREG(st.st_mode)) || (S_ISDIR(st.st_mode)))) {
56 LOG(log_warning, logtype_afpd, "get_nfsv4_acl(\"%s/%s\"): special", getcwdpath(), name);
60 if ((ace_count = acl(name, ACE_GETACLCNT, 0, NULL)) == 0) {
61 LOG(log_warning, logtype_afpd, "get_nfsv4_acl(\"%s/%s\"): 0 ACEs", getcwdpath(), name);
65 if (ace_count == -1) {
66 LOG(log_error, logtype_afpd, "get_nfsv4_acl: acl('%s/%s', ACE_GETACLCNT): ace_count %i, error: %s",
67 getcwdpath(), name, ace_count, strerror(errno));
71 aces = malloc(ace_count * sizeof(ace_t));
73 LOG(log_error, logtype_afpd, "get_nfsv4_acl: malloc error");
77 if ( (acl(name, ACE_GETACL, ace_count, aces)) == -1 ) {
78 LOG(log_error, logtype_afpd, "get_nfsv4_acl: acl(ACE_GETACL) error");
83 LOG(log_debug9, logtype_afpd, "get_nfsv4_acl: file: %s -> No. of ACEs: %d", name, ace_count);
92 ace_t *concat_aces(ace_t *aces1, int ace1count, ace_t *aces2, int ace2count)
97 /* malloc buffer for new ACL */
98 if ((new_aces = malloc((ace1count + ace2count) * sizeof(ace_t))) == NULL) {
99 LOG(log_error, logtype_afpd, "combine_aces: malloc %s", strerror(errno));
103 /* Copy ACEs from buf1 */
104 for (i=0; i < ace1count; ) {
105 memcpy(&new_aces[i], &aces1[i], sizeof(ace_t));
111 /* Copy ACEs from buf2 */
112 for (i=0; i < ace2count; ) {
113 memcpy(&new_aces[j], &aces2[i], sizeof(ace_t));
121 Remove any trivial ACE "in-place". Returns no of non-trivial ACEs
123 int strip_trivial_aces(ace_t **saces, int sacecount)
127 ace_t *aces = *saces;
130 if (aces == NULL || sacecount <= 0)
133 /* Count non-trivial ACEs */
134 for (i=0; i < sacecount; ) {
135 if ( ! (aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE)))
139 /* malloc buffer for new ACL */
140 if ((new_aces = malloc(nontrivaces * sizeof(ace_t))) == NULL) {
141 LOG(log_error, logtype_afpd, "strip_trivial_aces: malloc %s", strerror(errno));
145 /* Copy non-trivial ACEs */
146 for (i=0, j=0; i < sacecount; ) {
147 if ( ! (aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) {
148 memcpy(&new_aces[j], &aces[i], sizeof(ace_t));
157 LOG(log_debug7, logtype_afpd, "strip_trivial_aces: non-trivial ACEs: %d", nontrivaces);
163 Remove non-trivial ACEs "in-place". Returns no of trivial ACEs.
165 int strip_nontrivial_aces(ace_t **saces, int sacecount)
169 ace_t *aces = *saces;
172 /* Count trivial ACEs */
173 for (i=0; i < sacecount; ) {
174 if ((aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE)))
178 /* malloc buffer for new ACL */
179 if ((new_aces = malloc(trivaces * sizeof(ace_t))) == NULL) {
180 LOG(log_error, logtype_afpd, "strip_nontrivial_aces: malloc %s", strerror(errno));
184 /* Copy trivial ACEs */
185 for (i=0, j=0; i < sacecount; ) {
186 if ((aces[i].a_flags & (ACE_OWNER | ACE_GROUP | ACE_EVERYONE))) {
187 memcpy(&new_aces[j], &aces[i], sizeof(ace_t));
196 LOG(log_debug7, logtype_afpd, "strip_nontrivial_aces: trivial ACEs: %d", trivaces);
202 * Change mode of file preserving existing explicit ACEs
205 * (1) reads objects ACL (acl1)
206 * (2) removes all trivial ACEs from the ACL by calling strip_trivial_aces(), possibly
207 * leaving 0 ACEs in the ACL if there were only trivial ACEs as mapped from the mode
208 * (3) calls chmod() with mode
209 * (4) reads the changed ACL (acl2) which
210 * a) might still contain explicit ACEs (up to onnv132)
211 * b) will have any explicit ACE removed (starting with onnv145/Openindiana)
212 * (5) strip any explicit ACE from acl2 using strip_nontrivial_aces()
213 * (6) merge acl2 and acl2
214 * (7) set the ACL merged ACL on the object
216 int nfsv4_chmod(char *name, mode_t mode)
220 ace_t *oacl = NULL, *nacl = NULL, *cacl = NULL;
222 LOG(log_debug, logtype_afpd, "nfsv4_chmod(\"%s/%s\", %04o)",
223 getcwdpath(), name, mode);
225 if ((noaces = get_nfsv4_acl(name, &oacl)) == -1) /* (1) */
227 if ((noaces = strip_trivial_aces(&oacl, noaces)) == -1) /* (2) */
233 if (chmod(name, mode) != 0) /* (3) */
236 if ((nnaces = get_nfsv4_acl(name, &nacl)) == -1) /* (4) */
238 if ((nnaces = strip_nontrivial_aces(&nacl, nnaces)) == -1) /* (5) */
241 if ((cacl = concat_aces(oacl, noaces, nacl, nnaces)) == NULL) /* (6) */
244 if ((ret = acl(name, ACE_SETACL, noaces + nnaces, cacl)) != 0) {
245 LOG(log_error, logtype_afpd, "nfsv4_chmod: error setting acl: %s", strerror(errno));
250 if (oacl) free(oacl);
251 if (nacl) free(nacl);
252 if (cacl) free(cacl);
254 LOG(log_debug, logtype_afpd, "nfsv4_chmod(\"%s/%s\", %04o): result: %u",
255 getcwdpath(), name, mode, ret);
260 #endif /* HAVE_SOLARIS_ACLS */