/*      $OpenBSD: ex_file.c,v 1.9 2016/05/27 09:18:12 martijn Exp $     */

/*-
 * Copyright (c) 1992, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 * Copyright (c) 1992, 1993, 1994, 1995, 1996
 *      Keith Bostic.  All rights reserved.
 *
 * See the LICENSE file for redistribution information.
 */

#include "config.h"

#include <sys/types.h>
#include <sys/queue.h>

#include <bitstring.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "../common/common.h"

/*
 * ex_file -- :f[ile] [name]
 *      Change the file's name and display the status line.
 *
 * PUBLIC: int ex_file(SCR *, EXCMD *);
 */
int
ex_file(SCR *sp, EXCMD *cmdp)
{
        CHAR_T *p;
        FREF *frp;

        NEEDFILE(sp, cmdp);

        switch (cmdp->argc) {
        case 0:
                break;
        case 1:
                frp = sp->frp;

                /* Make sure can allocate enough space. */
                if ((p = v_strdup(sp,
                    cmdp->argv[0]->bp, cmdp->argv[0]->len)) == NULL)
                        return (1);

                /* If already have a file name, it becomes the alternate. */
                if (!F_ISSET(frp, FR_TMPFILE))
                        set_alt_name(sp, frp->name);

                /* Free the previous name. */
                free(frp->name);
                frp->name = p;

                /*
                 * The file has a real name, it's no longer a temporary,
                 * clear the temporary file flags.
                 */
                F_CLR(frp, FR_TMPEXIT | FR_TMPFILE);

                /* Have to force a write if the file exists, next time. */
                F_SET(frp, FR_NAMECHANGE);

                /* Notify the screen. */
                (void)sp->gp->scr_rename(sp, sp->frp->name, 1);
                break;
        default:
                abort();
        }
        msgq_status(sp, sp->lno, MSTAT_SHOWLAST);
        return (0);
}