2 * Copyright (c) 1992, 1993, 1994
3 * The Regents of the University of California. All rights reserved.
4 * Copyright (c) 1992, 1993, 1994, 1995, 1996
5 * Keith Bostic. All rights reserved.
7 * See the LICENSE file for redistribution information.
13 static const char sccsid[] = "$Id: ex_edit.c,v 10.15 2011/12/22 23:26:50 zy Exp $";
16 #include <sys/types.h>
17 #include <sys/queue.h>
20 #include <bitstring.h>
27 #include "../common/common.h"
30 static int ex_N_edit __P((SCR *, EXCMD *, FREF *, int));
33 * ex_edit -- :e[dit][!] [+cmd] [file]
34 * :ex[!] [+cmd] [file]
35 * :vi[sual][!] [+cmd] [file]
37 * Edit a file; if none specified, re-edit the current file. The third
38 * form of the command can only be executed while in vi mode. See the
39 * hack in ex.c:ex_cmd().
42 * Historic vi didn't permit the '+' command form without specifying
43 * a file name as well. This seems unreasonable, so we support it
46 * PUBLIC: int ex_edit __P((SCR *, EXCMD *));
49 ex_edit(SCR *sp, EXCMD *cmdp)
59 * If the name has been changed, we edit that file, not the
60 * original name. If the user was editing a temporary file
61 * (or wasn't editing any file), create another one. The
62 * reason for not reusing temporary files is that there is
63 * special exit processing of them, and reuse is tricky.
66 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
67 if ((frp = file_add(sp, NULL)) == NULL)
75 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
77 if ((frp = file_add(sp, np)) == NULL)
87 if (F_ISSET(cmdp, E_NEWSCREEN) || cmdp->cmd == &cmds[C_VSPLIT])
88 return (ex_N_edit(sp, cmdp, frp, attach));
91 * Check for modifications.
94 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
96 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
100 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
101 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
104 F_SET(sp, SC_FSWITCH);
110 * New screen version of ex_edit.
113 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach)
117 /* Get a new screen. */
118 if (screen_init(sp->gp, sp, &new))
120 if ((cmdp->cmd == &cmds[C_VSPLIT] && vs_vsplit(sp, new)) ||
121 (cmdp->cmd != &cmds[C_VSPLIT] && vs_split(sp, new, 0))) {
122 (void)screen_end(new);
126 /* Get a backing file. */
128 /* Copy file state, keep the screen and cursor the same. */
133 new->frp->flags = sp->frp->flags;
138 #if defined(USE_WIDECHAR) && defined(USE_ICONV)
139 /* Synchronize the iconv environments. */
140 o_set(new, O_FILEENCODING, OS_STRDUP,
141 O_STR(sp, O_FILEENCODING), 0);
142 conv_enc(new, O_FILEENCODING, 0);
144 } else if (file_init(new, frp, NULL,
145 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
146 (void)vs_discard(new, NULL);
147 (void)screen_end(new);
151 /* Create the argument list. */
152 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
154 /* Set up the switch. */
156 F_SET(sp, SC_SSWITCH);