1 files changed, 107 insertions, 0 deletions
diff --git a/usr/src/uts/common/brand/lx/syscall/lx_chmod.c b/usr/src/uts/common/brand/lx/syscall/lx_chmod.c
new file mode 100644
index 0000000000..7783b97cb0
--- /dev/null
+++ b/usr/src/uts/common/brand/lx/syscall/lx_chmod.c
@@ -0,0 +1,107 @@
+/*
+ * This file and its contents are supplied under the terms of the
+ * Common Development and Distribution License ("CDDL"), version 1.0.
+ * You may only use this file in accordance with the terms of version
+ * 1.0 of the CDDL.
+ *
+ * A full copy of the text of the CDDL should have accompanied this
+ * source.  A copy of the CDDL is also available via the Internet at
+ * http://www.illumos.org/license/CDDL.
+ */
+
+/*
+ * Copyright 2015 Joyent, Inc.
+ */
+
+#include <sys/systm.h>
+#include <sys/fcntl.h>
+#include <sys/thread.h>
+#include <sys/klwp.h>
+#include <sys/lx_brand.h>
+#include <sys/lx_fcntl.h>
+
+long
+lx_vn_chmod(vnode_t *vp, int mode)
+{
+	vattr_t vattr;
+
+	vattr.va_mode = mode & MODEMASK;
+	vattr.va_mask = AT_MODE;
+
+	if (vn_is_readonly(vp)) {
+		return (EROFS);
+	}
+	return (VOP_SETATTR(vp, &vattr, 0, CRED(), NULL));
+}
+
+static long
+lx_fchmodat_wrapper(int fd, char *path, int mode)
+{
+	long error;
+	vnode_t *vp;
+
+	if ((error = lx_vp_at(fd, path, &vp, 0)) != 0) {
+		lx_proc_data_t *pd = ttolxproc(curthread);
+
+		/*
+		 * If the process is in "install mode", return success
+		 * if the operation failed due to an absent file.
+		 */
+		if (error == ENOENT &&
+		    (pd->l_flags & LX_PROC_INSTALL_MODE)) {
+			return (0);
+		}
+		return (set_errno(error));
+	}
+
+	error = lx_vn_chmod(vp, mode);
+	VN_RELE(vp);
+
+	if (error != 0) {
+		return (set_errno(error));
+	}
+	return (0);
+}
+
+long
+lx_fchmodat(int fd, char *path, int mode)
+{
+	return (lx_fchmodat_wrapper(fd, path, mode));
+}
+
+long
+lx_fchmod(int fd, int mode)
+{
+	file_t *fp;
+	vnode_t *vp;
+	long error;
+
+	/*
+	 * In order to do proper O_PATH handling, lx_fchmod cannot leverage
+	 * lx_fchmodat with a NULL path since the desired behavior differs.
+	 */
+	if ((fp = getf(fd)) == NULL) {
+		return (set_errno(EBADF));
+	}
+	if (LX_IS_O_PATH(fp)) {
+		releasef(fd);
+		return (set_errno(EBADF));
+	}
+	vp = fp->f_vnode;
+	VN_HOLD(vp);
+	releasef(fd);
+
+	error = lx_vn_chmod(vp, mode);
+	VN_RELE(vp);
+
+	if (error != 0) {
+		return (set_errno(error));
+	}
+	return (0);
+}
+
+long
+lx_chmod(char *path, int mode)
+{
+	return (lx_fchmodat_wrapper(LX_AT_FDCWD, path, mode));
+}