1 /* $NetBSD: ex_edit.c,v 1.7 2014/01/26 21:43:45 christos Exp $ */
2 /*-
3 * Copyright (c) 1992, 1993, 1994
4 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1992, 1993, 1994, 1995, 1996
6 * Keith Bostic. All rights reserved.
7 *
8 * See the LICENSE file for redistribution information.
9 */
10
11 #include "config.h"
12
13 #include <sys/cdefs.h>
14 #if 0
15 #ifndef lint
16 static const char sccsid[] = "Id: ex_edit.c,v 10.14 2001/08/28 13:29:15 skimo Exp (Berkeley) Date: 2001/08/28 13:29:15 ";
17 #endif /* not lint */
18 #else
19 __RCSID("$NetBSD: ex_edit.c,v 1.7 2014/01/26 21:43:45 christos Exp $");
20 #endif
21
22 #include <sys/types.h>
23 #include <sys/queue.h>
24 #include <sys/time.h>
25
26 #include <bitstring.h>
27 #include <errno.h>
28 #include <limits.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32
33 #include "../common/common.h"
34 #include "../vi/vi.h"
35
36 static int ex_N_edit __P((SCR *, EXCMD *, FREF *, int));
37
38 /*
39 * ex_edit -- :e[dit][!] [+cmd] [file]
40 * :ex[!] [+cmd] [file]
41 * :vi[sual][!] [+cmd] [file]
42 *
43 * Edit a file; if none specified, re-edit the current file. The third
44 * form of the command can only be executed while in vi mode. See the
45 * hack in ex.c:ex_cmd().
46 *
47 * !!!
48 * Historic vi didn't permit the '+' command form without specifying
49 * a file name as well. This seems unreasonable, so we support it
50 * regardless.
51 *
52 * PUBLIC: int ex_edit __P((SCR *, EXCMD *));
53 */
54 int
ex_edit(SCR * sp,EXCMD * cmdp)55 ex_edit(SCR *sp, EXCMD *cmdp)
56 {
57 FREF *frp;
58 int attach, setalt;
59 const char *np;
60 size_t nlen;
61
62 switch (cmdp->argc) {
63 case 0:
64 /*
65 * If the name has been changed, we edit that file, not the
66 * original name. If the user was editing a temporary file
67 * (or wasn't editing any file), create another one. The
68 * reason for not reusing temporary files is that there is
69 * special exit processing of them, and reuse is tricky.
70 */
71 frp = sp->frp;
72 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
73 if ((frp = file_add(sp, NULL)) == NULL)
74 return (1);
75 attach = 0;
76 } else
77 attach = 1;
78 setalt = 0;
79 break;
80 case 1:
81 INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1,
82 np, nlen);
83 if ((frp = file_add(sp, np)) == NULL)
84 return (1);
85 attach = 0;
86 setalt = 1;
87 set_alt_name(sp, np);
88 break;
89 default:
90 abort();
91 }
92
93 if (F_ISSET(cmdp, E_NEWSCREEN) || cmdp->cmd == &cmds[C_VSPLIT])
94 return (ex_N_edit(sp, cmdp, frp, attach));
95
96 /*
97 * Check for modifications.
98 *
99 * !!!
100 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
101 */
102 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
103 return (1);
104
105 /* Switch files. */
106 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
107 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
108 return (1);
109
110 F_SET(sp, SC_FSWITCH);
111 return (0);
112 }
113
114 /*
115 * ex_N_edit --
116 * New screen version of ex_edit.
117 */
118 static int
ex_N_edit(SCR * sp,EXCMD * cmdp,FREF * frp,int attach)119 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach)
120 {
121 SCR *new;
122
123 /* Get a new screen. */
124 if (screen_init(sp->gp, sp, &new))
125 return (1);
126 if ((cmdp->cmd == &cmds[C_VSPLIT] && vs_vsplit(sp, new)) ||
127 (cmdp->cmd != &cmds[C_VSPLIT] && vs_split(sp, new, 0))) {
128 (void)screen_fini(new);
129 return (1);
130 }
131
132 /* Get a backing file. */
133 if (attach) {
134 /* Copy file state, keep the screen and cursor the same. */
135 new->ep = sp->ep;
136 ++new->ep->refcnt;
137 TAILQ_INSERT_HEAD(&new->ep->scrq, new, eq);
138
139 new->frp = frp;
140 new->frp->flags = sp->frp->flags;
141
142 new->lno = sp->lno;
143 new->cno = sp->cno;
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);
148 return (1);
149 }
150
151 /* Create the argument list. */
152 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
153
154 /* Set up the switch. */
155 sp->nextdisp = new;
156 F_SET(sp, SC_SSWITCH);
157
158 return (0);
159 }
160