diff options
Diffstat (limited to 'source3/lib/sysacls.c')
| -rw-r--r-- | source3/lib/sysacls.c | 536 |
1 files changed, 536 insertions, 0 deletions
diff --git a/source3/lib/sysacls.c b/source3/lib/sysacls.c index 640684ffca..94f0a10d46 100644 --- a/source3/lib/sysacls.c +++ b/source3/lib/sysacls.c @@ -731,6 +731,542 @@ int sys_acl_free_acl(SMB_ACL_T acl_d) } #elif defined(HAVE_SOLARIS_ACLS) +/* + * Code donated by Toomas Soome <tsoome@ut.ee>. + * Based on the implementation by Michael Davidson <md@sco.COM> for UnixWare. + */ + +#define INITIAL_ACL_SIZE 16 + +int sys_acl_get_entry(SMB_ACL_T acl_d, int entry_id, SMB_ACL_ENTRY_T *entry_p) +{ + if (entry_id != SMB_ACL_FIRST_ENTRY && entry_id != SMB_ACL_NEXT_ENTRY) { + errno = EINVAL; + return -1; + } + + if (entry_p == NULL) { + errno = EINVAL; + return -1; + } + + if (entry_id == SMB_ACL_FIRST_ENTRY) { + acl_d->next = 0; + } + + if (acl_d->next < 0) { + errno = EINVAL; + return -1; + } + + if (acl_d->next >= acl_d->count) { + return 0; + } + + *entry_p = &acl_d->acl[acl_d->next++]; + + return 1; +} + +int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p) +{ + *type_p = entry_d->a_type; + + return 0; +} + +int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p) +{ + *permset_p = &entry_d->a_perm; + + return 0; +} + +void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d) +{ + if (entry_d->a_type != SMB_ACL_USER + && entry_d->a_type != SMB_ACL_GROUP) { + errno = EINVAL; + return NULL; + } + + return &entry_d->a_id; +} + +SMB_ACL_T sys_acl_get_file(const char *path_p, SMB_ACL_TYPE_T type) +{ + SMB_ACL_T acl_d; + int count; /* # of ACL entries allocated */ + int naccess; /* # of access ACL entries */ + int ndefault; /* # of default ACL entries */ + + if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) { + errno = EINVAL; + return NULL; + } + + count = INITIAL_ACL_SIZE; + if ((acl_d = sys_acl_init(count)) == NULL) { + return NULL; + } + + while ((count = acl(path_p, GETACL, count, &acl_d->acl[0])) < 0 + && errno == ENOSPC) { + + if ((count = acl(path_p, GETACLCNT, 0, NULL)) < 0) { + return NULL; + } + + sys_acl_free_acl(acl_d); + + if ((acl_d = sys_acl_init(count)) == NULL) { + return NULL; + } + } + + if (count < 0) { + return NULL; + } + + /* + * calculate the number of access and default ACL entries + * + * Note: we assume that the acl() system call returned a + * well formed ACL which is sorted so that all of the + * access ACL entries preceed any default ACL entries + */ + for (naccess = 0; naccess < count; naccess++) { + if (acl_d->acl[naccess].a_type & ACL_DEFAULT) + break; + } + ndefault = count - naccess; + + /* + * if the caller wants the default ACL we have to copy + * the entries down to the start of the acl[] buffer + * and mask out the ACL_DEFAULT flag from the type field + */ + if (type == SMB_ACL_TYPE_DEFAULT) { + int i, j; + + for (i = 0, j = naccess; i < ndefault; i++, j++) { + acl_d->acl[i] = acl_d->acl[j]; + acl_d->acl[i].a_type &= ~ACL_DEFAULT; + } + + acl_d->count = ndefault; + } else { + acl_d->count = naccess; + } + + return acl_d; +} + +SMB_ACL_T sys_acl_get_fd(int fd) +{ + SMB_ACL_T acl_d; + int count; /* # of ACL entries allocated */ + int naccess; /* # of access ACL entries */ + + count = INITIAL_ACL_SIZE; + if ((acl_d = sys_acl_init(count)) == NULL) { + return NULL; + } + + while ((count = facl(fd, GETACL, count, &acl_d->acl[0])) < 0 + && errno == ENOSPC) { + + if ((count = facl(fd, GETACLCNT, 0, NULL)) < 0) { + return NULL; + } + + sys_acl_free_acl(acl_d); + + if ((acl_d = sys_acl_init(count)) == NULL) { + return NULL; + } + } + + if (count < 0) { + return NULL; + } + + /* + * calculate the number of access ACL entries + */ + for (naccess = 0; naccess < count; naccess++) { + if (acl_d->acl[naccess].a_type & ACL_DEFAULT) + break; + } + + acl_d->count = naccess; + + return acl_d; +} + +int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d) +{ + *permset_d = 0; + + return 0; +} + +int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm) +{ + if (perm != SMB_ACL_READ && perm != SMB_ACL_WRITE + && perm != SMB_ACL_EXECUTE) { + errno = EINVAL; + return -1; + } + + if (permset_d == NULL) { + errno = EINVAL; + return -1; + } + + *permset_d |= perm; + + return 0; +} + +int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm) +{ + return *permset_d & perm; +} + +char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p) +{ + int i; + int len, maxlen; + char *text; + + /* + * use an initial estimate of 20 bytes per ACL entry + * when allocating memory for the text representation + * of the ACL + */ + len = 0; + maxlen = 20 * acl_d->count; + if ((text = malloc(maxlen)) == NULL) { + errno = ENOMEM; + return NULL; + } + + for (i = 0; i < acl_d->count; i++) { + struct acl *ap = &acl_d->acl[i]; + struct passwd *pw; + struct group *gr; + char tagbuf[12]; + char idbuf[12]; + char *tag; + char *id = ""; + char perms[4]; + int nbytes; + + switch (ap->a_type) { + /* + * for debugging purposes it's probably more + * useful to dump unknown tag types rather + * than just returning an error + */ + default: + slprintf(tagbuf, sizeof(tagbuf)-1, "0x%x", + ap->a_type); + tag = tagbuf; + slprintf(idbuf, sizeof(idbuf)-1, "%ld", + (long)ap->a_id); + id = idbuf; + break; + + case SMB_ACL_USER: + if ((pw = getpwuid(ap->a_id)) == NULL) { + slprintf(idbuf, sizeof(idbuf)-1, "%ld", + (long)ap->a_id); + id = idbuf; + } else { + id = pw->pw_name; + } + case SMB_ACL_USER_OBJ: + tag = "user"; + break; + + case SMB_ACL_GROUP: + if ((gr = getgrgid(ap->a_id)) == NULL) { + slprintf(idbuf, sizeof(idbuf)-1, "%ld", + (long)ap->a_id); + id = idbuf; + } else { + id = gr->gr_name; + } + case SMB_ACL_GROUP_OBJ: + tag = "group"; + break; + + case SMB_ACL_OTHER: + tag = "other"; + break; + + case SMB_ACL_MASK: + tag = "mask"; + break; + + } + + perms[0] = (ap->a_perm & SMB_ACL_READ) ? 'r' : '-'; + perms[1] = (ap->a_perm & SMB_ACL_WRITE) ? 'w' : '-'; + perms[2] = (ap->a_perm & SMB_ACL_EXECUTE) ? 'x' : '-'; + perms[3] = '\0'; + + /* <tag> : <qualifier> : rwx \n \0 */ + nbytes = strlen(tag) + 1 + strlen(id) + 1 + 3 + 1 + 1; + + if ((len + nbytes) > maxlen) { + /* + * allocate enough additional memory for this + * entry and an estimate of another 20 bytes + * for each entry still to be processed + */ + maxlen += nbytes + 20 * (acl_d->count - i); + + if ((text = realloc(text, maxlen)) == NULL) { + errno = ENOMEM; + return NULL; + } + } + + slprintf(&text[len], nbytes-1, "%s:%s:%s\n", tag, id, perms); + len += nbytes - 1; + } + + if (len_p) + *len_p = len; + + return text; +} + +SMB_ACL_T sys_acl_init(int count) +{ + SMB_ACL_T a; + + if (count < 0) { + errno = EINVAL; + return NULL; + } + + /* + * note that since the definition of the structure pointed + * to by the SMB_ACL_T includes the first element of the + * acl[] array, this actually allocates an ACL with room + * for (count+1) entries + */ + if ((a = malloc(sizeof(*a) + count * sizeof(struct acl))) == NULL) { + errno = ENOMEM; + return NULL; + } + + a->size = count + 1; + a->count = 0; + a->next = -1; + + return a; +} + + +int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p) +{ + SMB_ACL_T acl_d; + SMB_ACL_ENTRY_T entry_d; + + if (acl_p == NULL || entry_p == NULL || (acl_d = *acl_p) == NULL) { + errno = EINVAL; + return -1; + } + + if (acl_d->count >= acl_d->size) { + errno = ENOSPC; + return -1; + } + + entry_d = &acl_d->acl[acl_d->count++]; + entry_d->a_type = 0; + entry_d->a_id = -1; + entry_d->a_perm = 0; + *entry_p = entry_d; + + return 0; +} + +int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type) +{ + switch (tag_type) { + case SMB_ACL_USER: + case SMB_ACL_USER_OBJ: + case SMB_ACL_GROUP: + case SMB_ACL_GROUP_OBJ: + case SMB_ACL_OTHER: + case SMB_ACL_MASK: + entry_d->a_type = tag_type; + break; + default: + errno = EINVAL; + return -1; + } + + return 0; +} + +int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p) +{ + if (entry_d->a_type != SMB_ACL_GROUP + && entry_d->a_type != SMB_ACL_USER) { + errno = EINVAL; + return -1; + } + + entry_d->a_id = *((id_t *)qual_p); + + return 0; +} + +int sys_acl_set_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T permset_d) +{ + if (*permset_d & ~(SMB_ACL_READ|SMB_ACL_WRITE|SMB_ACL_EXECUTE)) { + return EINVAL; + } + + entry_d->a_perm = *permset_d; + + return 0; +} + +int sys_acl_valid(SMB_ACL_T acl_d) +{ + if (aclsort(acl_d->count, 0, acl_d->acl) != 0) { + errno = EINVAL; + return -1; + } + + return 0; +} + +int sys_acl_set_file(char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d) +{ + struct stat s; + struct acl *acl_p; + int acl_count; + struct acl *acl_buf = NULL; + int ret; + + if (type != SMB_ACL_TYPE_ACCESS && type != SMB_ACL_TYPE_DEFAULT) { + errno = EINVAL; + return -1; + } + + if (stat(name, &s) != 0) { + return -1; + } + + acl_p = &acl_d->acl[0]; + acl_count = acl_d->count; + + /* + * if it's a directory there is extra work to do + * since the acl() system call will replace both + * the access ACLs and the default ACLs (if any) + */ + if (S_ISDIR(s.st_mode)) { + SMB_ACL_T acc_acl; + SMB_ACL_T def_acl; + SMB_ACL_T tmp_acl; + int i; + + if (type == SMB_ACL_TYPE_ACCESS) { + acc_acl = acl_d; + def_acl = + tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_DEFAULT); + + } else { + def_acl = acl_d; + acc_acl = + tmp_acl = sys_acl_get_file(name, SMB_ACL_TYPE_ACCESS); + } + + if (tmp_acl == NULL) { + return -1; + } + + /* + * allocate a temporary buffer for the complete ACL + */ + acl_count = acc_acl->count + def_acl->count; + acl_p = + acl_buf = malloc(acl_count * sizeof(acl_buf[0])); + + if (acl_buf == NULL) { + sys_acl_free_acl(tmp_acl); + errno = ENOMEM; + return -1; + } + + /* + * copy the access control and default entries into the buffer + */ + memcpy(&acl_buf[0], &acc_acl->acl[0], + acc_acl->count * sizeof(acl_buf[0])); + + memcpy(&acl_buf[acc_acl->count], &def_acl->acl[0], + def_acl->count * sizeof(acl_buf[0])); + + /* + * set the ACL_DEFAULT flag on the default entries + */ + for (i = acc_acl->count; i < acl_count; i++) { + acl_buf[i].a_type |= ACL_DEFAULT; + } + + sys_acl_free_acl(tmp_acl); + + } else if (type != SMB_ACL_TYPE_ACCESS) { + errno = EINVAL; + return -1; + } + + if (aclsort(acl_count, 0, acl_p) != 0) { + errno = EINVAL; + ret = -1; + } else { + ret = acl(name, SETACL, acl_count, acl_p); + } + + if (acl_buf) { + free(acl_buf); + } + + return ret; +} + +int sys_acl_set_fd(int fd, SMB_ACL_T acl_d) +{ + if (aclsort(acl_d->count, 0, acl_d->acl) != 0) { + errno = EINVAL; + return -1; + } + + return facl(fd, SETACL, acl_d->count, &acl_d->acl[0]); +} + +int sys_acl_free_text(char *text) +{ + free(text); + return 0; +} + +int sys_acl_free_acl(SMB_ACL_T acl_d) +{ + free(acl_d); + return 0; +} + #elif defined(HAVE_IRIX_ACLS) #else /* No ACLs. */ |