1 files changed, 103 insertions, 0 deletions
diff --git a/contrib/nvi/ex/ex_preserve.c b/contrib/nvi/ex/ex_preserve.c
new file mode 100644
index 0000000..5614c88
--- /dev/null
+++ b/contrib/nvi/ex/ex_preserve.c
@@ -0,0 +1,103 @@
+/*-
+ * Copyright (c) 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)ex_preserve.c	10.12 (Berkeley) 4/27/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+
+#include <bitstring.h>
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "../common/common.h"
+
+/*
+ * ex_preserve -- :pre[serve]
+ *	Push the file to recovery.
+ *
+ * PUBLIC: int ex_preserve __P((SCR *, EXCMD *));
+ */
+int
+ex_preserve(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	recno_t lno;
+
+	NEEDFILE(sp, cmdp);
+
+	if (!F_ISSET(sp->ep, F_RCV_ON)) {
+		msgq(sp, M_ERR, "142|Preservation of this file not possible");
+		return (1);
+	}
+
+	/* If recovery not initialized, do so. */
+	if (F_ISSET(sp->ep, F_FIRSTMODIFY) && rcv_init(sp))
+		return (1);
+
+	/* Force the file to be read in, in case it hasn't yet. */
+	if (db_last(sp, &lno))
+		return (1);
+
+	/* Sync to disk. */
+	if (rcv_sync(sp, RCV_SNAPSHOT))
+		return (1);
+
+	msgq(sp, M_INFO, "143|File preserved");
+	return (0);
+}
+
+/*
+ * ex_recover -- :rec[over][!] file
+ *	Recover the file.
+ *
+ * PUBLIC: int ex_recover __P((SCR *, EXCMD *));
+ */
+int
+ex_recover(sp, cmdp)
+	SCR *sp;
+	EXCMD *cmdp;
+{
+	ARGS *ap;
+	FREF *frp;
+
+	ap = cmdp->argv[0];
+
+	/* Set the alternate file name. */
+	set_alt_name(sp, ap->bp);
+
+	/*
+	 * Check for modifications.  Autowrite did not historically
+	 * affect :recover.
+	 */
+	if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
+		return (1);
+
+	/* Get a file structure for the file. */
+	if ((frp = file_add(sp, ap->bp)) == NULL)
+		return (1);
+
+	/* Set the recover bit. */
+	F_SET(frp, FR_RECOVER);
+
+	/* Switch files. */
+	if (file_init(sp, frp, NULL, FS_SETALT |
+	    (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
+		return (1);
+
+	F_SET(sp, SC_FSWITCH);
+	return (0);
+}