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Diffstat (limited to 'usr.bin/vi/ex/ex_edit.c')
| -rw-r--r-- | usr.bin/vi/ex/ex_edit.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/usr.bin/vi/ex/ex_edit.c b/usr.bin/vi/ex/ex_edit.c new file mode 100644 index 000000000000..03629bf7309f --- /dev/null +++ b/usr.bin/vi/ex/ex_edit.c @@ -0,0 +1,124 @@ +/*- + * 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_edit.c 8.15 (Berkeley) 3/8/94"; +#endif /* not lint */ + +#include <sys/types.h> +#include <queue.h> +#include <sys/time.h> + +#include <bitstring.h> +#include <errno.h> +#include <limits.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <termios.h> + +#include <db.h> +#include <regex.h> + +#include "vi.h" +#include "excmd.h" + +/* + * ex_edit -- :e[dit][!] [+cmd] [file] + * :vi[sual][!] [+cmd] [file] + * + * Edit a file; if none specified, re-edit the current file. The second + * form of the command can only be executed while in vi mode. See the + * hack in ex.c:ex_cmd(). + * + * !!! + * Historic vi didn't permit the '+' command form without specifying + * a file name as well. + */ +int +ex_edit(sp, ep, cmdp) + SCR *sp; + EXF *ep; + EXCMDARG *cmdp; +{ + ARGS *ap; + FREF *frp; + + frp = sp->frp; + switch (cmdp->argc) { + case 0: + /* + * If the name has been changed, we edit that file, not the + * original name. If the user was editing a temporary file, + * create another one. The reason for this is that we do + * special exit processing of temporary files, and reusing + * them is tricky. + */ + if (frp->cname != NULL) { + if ((frp = file_add(sp, frp, frp->cname, 1)) == NULL) + return (1); + set_alt_name(sp, sp->frp->cname); + } else if (frp->name == NULL) + if ((frp = file_add(sp, frp, NULL, 1)) == NULL) + return (1); + break; + case 1: + ap = cmdp->argv[0]; + if ((frp = file_add(sp, sp->frp, ap->bp, 1)) == NULL) + return (1); + set_alt_name(sp, ap->bp); + break; + default: + abort(); + } + + /* + * Check for modifications. + * + * !!! + * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit. + */ + if (F_ISSET(ep, F_MODIFIED) && + ep->refcnt <= 1 && !F_ISSET(cmdp, E_FORCE)) { + msgq(sp, M_ERR, + "Modified since last write; write or use ! to override."); + return (1); + } + + /* Switch files. */ + if (file_init(sp, frp, NULL, F_ISSET(cmdp, E_FORCE))) + return (1); + F_SET(sp, S_FSWITCH); + return (0); +} |