/*-
 * 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	8.14 (Berkeley) 8/17/94";
#endif /* not lint */

#include <sys/types.h>
#include <sys/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 "compat.h"
#include <db.h>
#include <regex.h>
#include <pathnames.h>

#include "vi.h"
#include "excmd.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);
}