it seems that signedness of getdirentries(2) does not meet up with
	document.  does it make sense?  found by checking openbsd commit log.

itojun


Index: common/vfs_syscalls_12.c
===================================================================
RCS file: /cvsroot/syssrc/sys/compat/common/vfs_syscalls_12.c,v
retrieving revision 1.10
diff -u -r1.10 vfs_syscalls_12.c
--- common/vfs_syscalls_12.c	2001/11/13 02:08:04	1.10
+++ common/vfs_syscalls_12.c	2002/10/03 04:52:29
@@ -103,12 +103,15 @@
 	struct compat_12_sys_getdirentries_args /* {
 		syscallarg(int) fd;
 		syscallarg(char *) buf;
-		syscallarg(u_int) count;
+		syscallarg(int) count;
 		syscallarg(long *) basep;
 	} */ *uap = v;
 	struct file *fp;
 	int error, done;
 	long loff;
+
+	if (SCARG(uap, count) < 0)
+		return EINVAL;
 
 	/* getvnode() will use the descriptor for us */
 	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
Index: common/vfs_syscalls_43.c
===================================================================
RCS file: /cvsroot/syssrc/sys/compat/common/vfs_syscalls_43.c,v
retrieving revision 1.20
diff -u -r1.20 vfs_syscalls_43.c
--- common/vfs_syscalls_43.c	2001/11/13 02:08:05	1.20
+++ common/vfs_syscalls_43.c	2002/10/03 04:52:29
@@ -377,7 +377,7 @@
 	struct compat_43_sys_getdirentries_args /* {
 		syscallarg(int) fd;
 		syscallarg(char *) buf;
-		syscallarg(u_int) count;
+		syscallarg(int) count;
 		syscallarg(long *) basep;
 	} */ *uap = v;
 	struct vnode *vp;
@@ -388,6 +388,9 @@
 	caddr_t dirbuf;
 	int error, eofflag, readcnt;
 	long loff;
+
+	if (SCARG(uap, count) < 0)
+		return EINVAL;
 
 	/* getvnode() will use the descriptor for us */
 	if ((error = getvnode(p->p_fd, SCARG(uap, fd), &fp)) != 0)
Index: netbsd32/netbsd32_compat_12.c
===================================================================
RCS file: /cvsroot/syssrc/sys/compat/netbsd32/netbsd32_compat_12.c,v
retrieving revision 1.14
diff -u -r1.14 netbsd32_compat_12.c
--- netbsd32/netbsd32_compat_12.c	2002/03/16 20:43:54	1.14
+++ netbsd32/netbsd32_compat_12.c	2002/10/03 04:52:30
@@ -231,7 +231,7 @@
 	struct compat_12_netbsd32_getdirentries_args /* {
 		syscallarg(int) fd;
 		syscallarg(netbsd32_charp) buf;
-		syscallarg(u_int) count;
+		syscallarg(int) count;
 		syscallarg(netbsd32_longp) basep;
 	} */ *uap = v;
 	struct compat_12_sys_getdirentries_args ua;