/*
- Unix SMB/Netbios implementation.
- Version 2.2.
+ Unix SMB/CIFS implementation.
Samba system utilities for ACL support.
Copyright (C) Jeremy Allison 2000.
+ Copyright (C) Volker Lendecke 2006
+ Copyright (C) Michael Adam 2006
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
#include "includes.h"
-extern int DEBUGLEVEL;
+#undef DBGC_CLASS
+#define DBGC_CLASS DBGC_ACLS
/*
- This file wraps all differing system ACL interfaces into a consistent
- one based on the POSIX interface. It also returns the correct errors
- for older UNIX systems that don't support ACLs.
-
- The interfaces that each ACL implementation must support are as follows :
-
- int sys_acl_get_entry( SMB_ACL_T acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
- int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
- int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p
- void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
- SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
- SMB_ACL_T sys_acl_get_fd(int fd)
- int sys_acl_free( void *obj_p)
- int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset);
- int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
- char *sys_acl_to_text( SMB_ACL_T acl, ssize_t *plen)
-
- This next one is not POSIX complient - but we *have* to have it !
- More POSIX braindamage.
-
- int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
-*/
+ * Note that while this code implements sufficient functionality
+ * to support the sys_acl_* interfaces it does not provide all
+ * of the semantics of the POSIX ACL interfaces.
+ *
+ * In particular, an ACL entry descriptor (SMB_ACL_ENTRY_T) returned
+ * from a call to sys_acl_get_entry() should not be assumed to be
+ * valid after calling any of the following functions, which may
+ * reorder the entries in the ACL.
+ *
+ * sys_acl_valid()
+ * sys_acl_set_file()
+ * sys_acl_set_fd()
+ */
+
+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 defined(HAVE_POSIX_ACLS)
+ if (entry_p == NULL) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ if (entry_id == SMB_ACL_FIRST_ENTRY) {
+ acl_d->next = 0;
+ }
-/* Identity mapping - easy. */
+ 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_entry( SMB_ACL_T acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
+int sys_acl_get_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *type_p)
{
- return acl_get_entry( acl, entry_id, entry_p);
+ *type_p = entry_d->a_type;
+
+ return 0;
}
-int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
+int sys_acl_get_permset(SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
{
- return acl_get_tag_type( entry_d, tag_type_p);
+ *permset_p = &entry_d->a_perm;
+
+ return 0;
}
-int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
+void *sys_acl_get_qualifier(SMB_ACL_ENTRY_T entry_d)
{
- return acl_get_permset( entry_d, permset_p);
+ if (entry_d->a_type == SMB_ACL_USER) {
+ return &entry_d->uid;
+ }
+
+ if (entry_d->a_type == SMB_ACL_GROUP) {
+ return &entry_d->gid;
+ }
+
+ errno = EINVAL;
+ return NULL;
}
-void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
+int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset_d)
{
- return acl_get_qualifier( entry_d);
+ *permset_d = 0;
+
+ return 0;
}
-SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
+int sys_acl_add_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
- return acl_get_file( path_p, type);
+ 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;
}
-SMB_ACL_T sys_acl_get_fd(int fd)
+int sys_acl_get_perm(SMB_ACL_PERMSET_T permset_d, SMB_ACL_PERM_T perm)
{
- return acl_get_fd(fd);
+ return *permset_d & perm;
}
-int sys_acl_free( void *obj_p)
+char *sys_acl_to_text(SMB_ACL_T acl_d, ssize_t *len_p)
{
- return acl_free(obj_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 = (char *)SMB_MALLOC(maxlen)) == NULL) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ for (i = 0; i < acl_d->count; i++) {
+ struct smb_acl_entry *ap = &acl_d->acl[i];
+ struct group *gr;
+ char tagbuf[12];
+ char idbuf[12];
+ const char *tag;
+ const 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;
+ break;
+
+ case SMB_ACL_USER:
+ id = uidtoname(ap->uid);
+ case SMB_ACL_USER_OBJ:
+ tag = "user";
+ break;
+
+ case SMB_ACL_GROUP:
+ if ((gr = getgrgid(ap->gid)) == NULL) {
+ slprintf(idbuf, sizeof(idbuf)-1, "%ld",
+ (long)ap->gid);
+ 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 this entry would overflow the buffer
+ * allocate enough additional memory for this
+ * entry and an estimate of another 20 bytes
+ * for each entry still to be processed
+ */
+ if ((len + nbytes) > maxlen) {
+ maxlen += nbytes + 20 * (acl_d->count - i);
+ if ((text = (char *)SMB_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;
}
-int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
+SMB_ACL_T sys_acl_init(int count)
{
- return acl_clear_perms(permset);
+ 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 = (struct smb_acl_t *)SMB_MALLOC(
+ sizeof(struct smb_acl_t) +
+ count * sizeof(struct smb_acl_entry))) == NULL) {
+ errno = ENOMEM;
+ return NULL;
+ }
+
+ a->size = count + 1;
+ a->count = 0;
+ a->next = -1;
+
+ return a;
}
-int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
+int sys_acl_create_entry(SMB_ACL_T *acl_p, SMB_ACL_ENTRY_T *entry_p)
{
- return acl_add_perm(permset, perm);
+ 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 = SMB_ACL_TAG_INVALID;
+ entry_d->uid = -1;
+ entry_d->gid = -1;
+ entry_d->a_perm = 0;
+ *entry_p = entry_d;
+
+ return 0;
}
-int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
+int sys_acl_set_tag_type(SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T tag_type)
{
- return acl_get_perm(permset, perm);
+ 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;
}
-char *sys_acl_to_text( SMB_ACL_T acl, ssize_t *plen)
+int sys_acl_set_qualifier(SMB_ACL_ENTRY_T entry_d, void *qual_p)
{
- return acl_to_text( acl, plen);
+ if (entry_d->a_type == SMB_ACL_USER) {
+ entry_d->uid = *((uid_t *)qual_p);
+ return 0;
+ }
+ if (entry_d->a_type == SMB_ACL_GROUP) {
+ entry_d->gid = *((gid_t *)qual_p);
+ return 0;
+ }
+
+ errno = EINVAL;
+ return -1;
}
-#elif defined(HAVE_SOLARIS_ACLS)
+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)) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ entry_d->a_perm = *permset_d;
+
+ return 0;
+}
-#elif defined(HAVE_IRIX_ACLS)
+int sys_acl_free_text(char *text)
+{
+ SAFE_FREE(text);
+ return 0;
+}
-#else /* No ACLs. */
+int sys_acl_free_acl(SMB_ACL_T acl_d)
+{
+ SAFE_FREE(acl_d);
+ return 0;
+}
-int sys_acl_get_entry( SMB_ACL_T acl, int entry_id, SMB_ACL_ENTRY_T *entry_p)
+int sys_acl_free_qualifier(void *qual, SMB_ACL_TAG_T tagtype)
{
- return -1;
+ return 0;
}
-int sys_acl_get_tag_type( SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p)
+int sys_acl_valid(SMB_ACL_T acl_d)
{
+ errno = EINVAL;
return -1;
}
-int sys_acl_get_permset( SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p)
+/*
+ * acl_get_file, acl_get_fd, acl_set_file, acl_set_fd and
+ * sys_acl_delete_def_file are to be redirected to the default
+ * statically-bound acl vfs module, but they are replacable.
+ */
+
+#if defined(HAVE_POSIX_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
{
- return -1;
+ return posixacl_sys_acl_get_file(handle, path_p, type);
+}
+
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
+{
+ return posixacl_sys_acl_get_fd(handle, fsp, fd);
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+ return posixacl_sys_acl_set_file(handle, name, type, acl_d);
+}
+
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
+{
+ return posixacl_sys_acl_set_fd(handle, fsp, fd, acl_d);
}
-void *sys_acl_get_qualifier( SMB_ACL_ENTRY_T entry_d)
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
{
- return NULL;
+ return posixacl_sys_acl_delete_def_file(handle, path);
+}
+
+#elif defined(HAVE_AIX_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+ return aixacl_sys_acl_get_file(handle, path_p, type);
}
-SMB_ACL_T sys_acl_get_file( const char *path_p, SMB_ACL_TYPE_T type)
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
- return (SMB_ACL_T)NULL;
+ return aixacl_sys_acl_get_fd(handle, fsp, fd);
}
-SMB_ACL_T sys_acl_get_fd(int fd)
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
{
- return (SMB_ACL_T)NULL;
+ return aixacl_sys_acl_set_file(handle, name, type, acl_d);
}
-int sys_acl_free( void *obj_p)
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
{
- return -1;
+ return aixacl_sys_acl_set_fd(handle, fsp, fd, acl_d);
+}
+
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
+{
+ return aixacl_sys_acl_delete_def_file(handle, path);
+}
+
+#elif defined(HAVE_TRU64_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+ return tru64acl_sys_acl_get_file(handle, path_p, type);
+}
+
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
+{
+ return tru64acl_sys_acl_get_fd(handle, fsp, fd);
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+ return tru64acl_sys_acl_set_file(handle, name, type, acl_d);
+}
+
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
+{
+ return tru64acl_sys_acl_set_fd(handle, fsp, fd, acl_d);
+}
+
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
+{
+ return tru64acl_sys_acl_delete_def_file(handle, path);
+}
+
+#elif defined(HAVE_SOLARIS_ACLS) || defined(HAVE_UNIXWARE_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+ return solarisacl_sys_acl_get_file(handle, path_p, type);
}
-int sys_acl_clear_perms(SMB_ACL_PERMSET_T permset)
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
{
+ return solarisacl_sys_acl_get_fd(handle, fsp, fd);
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+ return solarisacl_sys_acl_set_file(handle, name, type, acl_d);
+}
+
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
+{
+ return solarisacl_sys_acl_set_fd(handle, fsp, fd, acl_d);
+}
+
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
+{
+ return solarisacl_sys_acl_delete_def_file(handle, path);
+}
+
+#elif defined(HAVE_HPUX_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+ return hpuxacl_sys_acl_get_file(handle, path_p, type);
+}
+
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
+{
+ return hpuxacl_sys_acl_get_fd(handle, fsp, fd);
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+ return hpuxacl_sys_acl_set_file(handle, name, type, acl_d);
+}
+
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
+{
+ return hpuxacl_sys_acl_set_fd(handle, fsp, fd, acl_d);
+}
+
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
+{
+ return hpuxacl_sys_acl_delete_def_file(handle, path);
+}
+
+#elif defined(HAVE_IRIX_ACLS)
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+ return irixacl_sys_acl_get_file(handle, path_p, type);
+}
+
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
+{
+ return irixacl_sys_acl_get_fd(handle, fsp, fd);
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+ return irixacl_sys_acl_set_file(handle, name, type, acl_d);
+}
+
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
+{
+ return irixacl_sys_acl_set_fd(handle, fsp, fd, acl_d);
+}
+
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
+{
+ return irixacl_sys_acl_delete_def_file(handle, path);
+}
+
+#else /* No ACLs. */
+
+SMB_ACL_T sys_acl_get_file(vfs_handle_struct *handle,
+ const char *path_p, SMB_ACL_TYPE_T type)
+{
+#ifdef ENOTSUP
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
+ return NULL;
+}
+
+SMB_ACL_T sys_acl_get_fd(vfs_handle_struct *handle, files_struct *fsp, int fd)
+{
+#ifdef ENOTSUP
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
+ return NULL;
+}
+
+int sys_acl_set_file(vfs_handle_struct *handle,
+ const char *name, SMB_ACL_TYPE_T type, SMB_ACL_T acl_d)
+{
+#ifdef ENOTSUP
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
return -1;
}
-int sys_acl_add_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
+int sys_acl_set_fd(vfs_handle_struct *handle, files_struct *fsp,
+ int fd, SMB_ACL_T acl_d)
{
+#ifdef ENOTSUP
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
return -1;
}
-int sys_acl_get_perm( SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm)
+int sys_acl_delete_def_file(vfs_handle_struct *handle,
+ const char *path)
{
- return (permset & perm) ? 1 : 0;
+#ifdef ENOTSUP
+ errno = ENOTSUP;
+#else
+ errno = ENOSYS;
+#endif
+ return -1;
}
-char *sys_acl_to_text( SMB_ACL_T acl, ssize_t *plen)
+#endif
+
+/************************************************************************
+ Deliberately outside the ACL defines. Return 1 if this is a "no acls"
+ errno, 0 if not.
+************************************************************************/
+
+int no_acl_syscall_error(int err)
{
- return NULL;
+#if defined(ENOSYS)
+ if (err == ENOSYS) {
+ return 1;
+ }
+#endif
+#if defined(ENOTSUP)
+ if (err == ENOTSUP) {
+ return 1;
+ }
+#endif
+ return 0;
}
-#endif /* No ACLs. */
git.samba.org / samba.git / blobdiff