diff options
Diffstat (limited to 'contrib/nvi/ex/ex_preserve.c')
-rw-r--r-- | contrib/nvi/ex/ex_preserve.c | 103 |
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); +} |