1 /* $OpenBSD: ex_edit.c,v 1.5 2009/10/27 23:59:47 deraadt Exp $ */
2
3 /*-
4 * Copyright (c) 1992, 1993, 1994
5 * The Regents of the University of California. All rights reserved.
6 * Copyright (c) 1992, 1993, 1994, 1995, 1996
7 * Keith Bostic. All rights reserved.
8 *
9 * See the LICENSE file for redistribution information.
10 */
11
12 #include "config.h"
13
14 #include <sys/types.h>
15 #include <sys/queue.h>
16 #include <sys/time.h>
17
18 #include <bitstring.h>
19 #include <errno.h>
20 #include <limits.h>
21 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24
25 #include "../common/common.h"
26 #include "../vi/vi.h"
27
28 static int ex_N_edit(SCR *, EXCMD *, FREF *, int);
29
30 /*
31 * ex_edit -- :e[dit][!] [+cmd] [file]
32 * :ex[!] [+cmd] [file]
33 * :vi[sual][!] [+cmd] [file]
34 *
35 * Edit a file; if none specified, re-edit the current file. The third
36 * form of the command can only be executed while in vi mode. See the
37 * hack in ex.c:ex_cmd().
38 *
39 * !!!
40 * Historic vi didn't permit the '+' command form without specifying
41 * a file name as well. This seems unreasonable, so we support it
42 * regardless.
43 *
44 * PUBLIC: int ex_edit(SCR *, EXCMD *);
45 */
46 int
ex_edit(sp,cmdp)47 ex_edit(sp, cmdp)
48 SCR *sp;
49 EXCMD *cmdp;
50 {
51 FREF *frp;
52 int attach, setalt;
53
54 switch (cmdp->argc) {
55 case 0:
56 /*
57 * If the name has been changed, we edit that file, not the
58 * original name. If the user was editing a temporary file
59 * (or wasn't editing any file), create another one. The
60 * reason for not reusing temporary files is that there is
61 * special exit processing of them, and reuse is tricky.
62 */
63 frp = sp->frp;
64 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
65 if ((frp = file_add(sp, NULL)) == NULL)
66 return (1);
67 attach = 0;
68 } else
69 attach = 1;
70 setalt = 0;
71 break;
72 case 1:
73 if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL)
74 return (1);
75 attach = 0;
76 setalt = 1;
77 set_alt_name(sp, cmdp->argv[0]->bp);
78 break;
79 default:
80 abort();
81 }
82
83 if (F_ISSET(cmdp, E_NEWSCREEN))
84 return (ex_N_edit(sp, cmdp, frp, attach));
85
86 /*
87 * Check for modifications.
88 *
89 * !!!
90 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
91 */
92 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
93 return (1);
94
95 /* Switch files. */
96 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
97 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
98 return (1);
99
100 F_SET(sp, SC_FSWITCH);
101 return (0);
102 }
103
104 /*
105 * ex_N_edit --
106 * New screen version of ex_edit.
107 */
108 static int
ex_N_edit(sp,cmdp,frp,attach)109 ex_N_edit(sp, cmdp, frp, attach)
110 SCR *sp;
111 EXCMD *cmdp;
112 FREF *frp;
113 int attach;
114 {
115 SCR *new;
116
117 /* Get a new screen. */
118 if (screen_init(sp->gp, sp, &new))
119 return (1);
120 if (vs_split(sp, new, 0)) {
121 (void)screen_end(new);
122 return (1);
123 }
124
125 /* Get a backing file. */
126 if (attach) {
127 /* Copy file state, keep the screen and cursor the same. */
128 new->ep = sp->ep;
129 ++new->ep->refcnt;
130
131 new->frp = frp;
132 new->frp->flags = sp->frp->flags;
133
134 new->lno = sp->lno;
135 new->cno = sp->cno;
136 } else if (file_init(new, frp, NULL,
137 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
138 (void)vs_discard(new, NULL);
139 (void)screen_end(new);
140 return (1);
141 }
142
143 /* Create the argument list. */
144 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
145
146 /* Set up the switch. */
147 sp->nextdisp = new;
148 F_SET(sp, SC_SSWITCH);
149
150 return (0);
151 }
152