usr.bin/vi/ex/ex_mkexrc.c

/*-
 * Copyright (c) 1992, 1993, 1994
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the University of
 *      California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)ex_mkexrc.c 8.10 (Berkeley) 3/22/94";
#endif /* not lint */

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

#include <bitstring.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>

#include <db.h>
#include <regex.h>
#include <pathnames.h>

#include "vi.h"
#include "excmd.h"
#include "seq.h"

/*
 * ex_mkexrc -- :mkexrc[!] [file]
 *
 * Create (or overwrite) a .exrc file with the current info.
 */
int
ex_mkexrc(sp, ep, cmdp)
        SCR *sp;
        EXF *ep;
        EXCMDARG *cmdp;
{
        struct stat sb;
        FILE *fp;
        int fd, sverrno;
        char *fname;

        switch (cmdp->argc) {
        case 0:
                fname = _PATH_EXRC;
                break;
        case 1:
                fname = cmdp->argv[0]->bp;
                set_alt_name(sp, fname);
                break;
        default:
                abort();
        }

        if (!F_ISSET(cmdp, E_FORCE) && !stat(fname, &sb)) {
                msgq(sp, M_ERR,
                    "%s exists, not written; use ! to override.", fname);
                return (1);
        }

        /* Create with max permissions of rw-r--r--. */
        if ((fd = open(fname, O_CREAT | O_TRUNC | O_WRONLY,
            S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH)) < 0) {
                msgq(sp, M_SYSERR, fname);
                return (1);
        }

        if ((fp = fdopen(fd, "w")) == NULL) {
                sverrno = errno;
                (void)close(fd);
                errno = sverrno;
                goto e2;
        }

        if (abbr_save(sp, fp) || ferror(fp))
                goto e1;
        if (map_save(sp, fp) || ferror(fp))
                goto e1;
        if (opts_save(sp, fp) || ferror(fp))
                goto e1;
#ifndef NO_DIGRAPH
        digraph_save(sp, fd);
#endif
        if (fclose(fp))
                goto e2;

        msgq(sp, M_INFO, "New .exrc file: %s. ", fname);
        return (0);

e1:     sverrno = errno;
        (void)fclose(fp);
        errno = sverrno;
e2:     msgq(sp, M_ERR, "%s: incomplete: %s", fname, strerror(errno));
        return (1);
}