Patch from SATOH Fumiyasu <fumiyas@osstech.co.jp> for bug #5202. Re-activate "acl group control"

parameter and make it only apply to owning group. Also added man page fix.
Jeremy.
(cherry picked from commit 93e91e5364a7f131d988648cf5fe822a9bd68734)

1 files changed, 26 insertions, 14 deletions

diff --git a/source/smbd/posix_acls.c b/source/smbd/posix_acls.c
index c3c9d2e60c4..86934f976bd 100644
--- a/source/smbd/posix_acls.c
+++ b/source/smbd/posix_acls.c
@@ -2364,20 +2364,32 @@ static bool current_user_in_group(gid_t gid)
 }
 
 /****************************************************************************
- Should we override a deny ?  Check deprecated 'acl group control'
- and 'dos filemode'
+ Should we override a deny ? Check 'acl group control' and 'dos filemode'.
 ****************************************************************************/
 
-static bool acl_group_override(connection_struct *conn, gid_t prim_gid)
+static bool acl_group_override(connection_struct *conn,
+				gid_t prim_gid,
+				const char *fname)
 {
-	if ( (errno == EACCES || errno == EPERM) 
-		&& (lp_acl_group_control(SNUM(conn)) || lp_dos_filemode(SNUM(conn)))
-		&& current_user_in_group(prim_gid)) 
-	{
-		return True;
-	} 
+	SMB_STRUCT_STAT sbuf;
 
-	return False;
+	if ((errno != EPERM) && (errno != EACCES)) {
+		return false;
+	}
+
+	/* file primary group == user primary or supplementary group */
+	if (lp_acl_group_control(SNUM(conn)) &&
+			current_user_in_group(prim_gid)) {
+		return true;
+	}
+
+	/* user has writeable permission */
+	if (lp_dos_filemode(SNUM(conn)) &&
+			can_write_to_file(conn, fname, &sbuf)) {
+		return true;
+	}
+
+	return false;
 }
 
 /****************************************************************************
@@ -2563,7 +2575,7 @@ static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool defau
 				*pacl_set_support = False;
 			}
 
-			if (acl_group_override(conn, prim_gid)) {
+			if (acl_group_override(conn, prim_gid, fsp->fsp_name)) {
 				int sret;
 
 				DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
@@ -2594,7 +2606,7 @@ static bool set_canon_ace_list(files_struct *fsp, canon_ace *the_ace, bool defau
 				*pacl_set_support = False;
 			}
 
-			if (acl_group_override(conn, prim_gid)) {
+			if (acl_group_override(conn, prim_gid, fsp->fsp_name)) {
 				int sret;
 
 				DEBUG(5,("set_canon_ace_list: acl group control on and current user in file %s primary group.\n",
@@ -3572,7 +3584,7 @@ NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 					if (SMB_VFS_SYS_ACL_DELETE_DEF_FILE(conn, fsp->fsp_name) == -1) {
 						int sret = -1;
 
-						if (acl_group_override(conn, sbuf.st_gid)) {
+						if (acl_group_override(conn, sbuf.st_gid, fsp->fsp_name)) {
 							DEBUG(5,("set_nt_acl: acl group control on and "
 								"current user in file %s primary group. Override delete_def_acl\n",
 								fsp->fsp_name ));
@@ -3619,7 +3631,7 @@ NTSTATUS set_nt_acl(files_struct *fsp, uint32 security_info_sent, SEC_DESC *psd)
 
 					if(SMB_VFS_CHMOD(conn,fsp->fsp_name, posix_perms) == -1) {
 						int sret = -1;
-						if (acl_group_override(conn, sbuf.st_gid)) {
+						if (acl_group_override(conn, sbuf.st_gid, fsp->fsp_name)) {
 							DEBUG(5,("set_nt_acl: acl group control on and "
 								"current user in file %s primary group. Override chmod\n",
 								fsp->fsp_name ));