1 /* $OpenBSD: ex_edit.c,v 1.6 2014/11/12 04:28:41 bentley 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(SCR * sp,EXCMD * cmdp)47 ex_edit(SCR *sp, EXCMD *cmdp)
48 {
49 FREF *frp;
50 int attach, setalt;
51
52 switch (cmdp->argc) {
53 case 0:
54 /*
55 * If the name has been changed, we edit that file, not the
56 * original name. If the user was editing a temporary file
57 * (or wasn't editing any file), create another one. The
58 * reason for not reusing temporary files is that there is
59 * special exit processing of them, and reuse is tricky.
60 */
61 frp = sp->frp;
62 if (sp->ep == NULL || F_ISSET(frp, FR_TMPFILE)) {
63 if ((frp = file_add(sp, NULL)) == NULL)
64 return (1);
65 attach = 0;
66 } else
67 attach = 1;
68 setalt = 0;
69 break;
70 case 1:
71 if ((frp = file_add(sp, cmdp->argv[0]->bp)) == NULL)
72 return (1);
73 attach = 0;
74 setalt = 1;
75 set_alt_name(sp, cmdp->argv[0]->bp);
76 break;
77 default:
78 abort();
79 }
80
81 if (F_ISSET(cmdp, E_NEWSCREEN))
82 return (ex_N_edit(sp, cmdp, frp, attach));
83
84 /*
85 * Check for modifications.
86 *
87 * !!!
88 * Contrary to POSIX 1003.2-1992, autowrite did not affect :edit.
89 */
90 if (file_m2(sp, FL_ISSET(cmdp->iflags, E_C_FORCE)))
91 return (1);
92
93 /* Switch files. */
94 if (file_init(sp, frp, NULL, (setalt ? FS_SETALT : 0) |
95 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
96 return (1);
97
98 F_SET(sp, SC_FSWITCH);
99 return (0);
100 }
101
102 /*
103 * ex_N_edit --
104 * New screen version of ex_edit.
105 */
106 static int
ex_N_edit(SCR * sp,EXCMD * cmdp,FREF * frp,int attach)107 ex_N_edit(SCR *sp, EXCMD *cmdp, FREF *frp, int attach)
108 {
109 SCR *new;
110
111 /* Get a new screen. */
112 if (screen_init(sp->gp, sp, &new))
113 return (1);
114 if (vs_split(sp, new, 0)) {
115 (void)screen_end(new);
116 return (1);
117 }
118
119 /* Get a backing file. */
120 if (attach) {
121 /* Copy file state, keep the screen and cursor the same. */
122 new->ep = sp->ep;
123 ++new->ep->refcnt;
124
125 new->frp = frp;
126 new->frp->flags = sp->frp->flags;
127
128 new->lno = sp->lno;
129 new->cno = sp->cno;
130 } else if (file_init(new, frp, NULL,
131 (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
132 (void)vs_discard(new, NULL);
133 (void)screen_end(new);
134 return (1);
135 }
136
137 /* Create the argument list. */
138 new->cargv = new->argv = ex_buildargv(sp, NULL, frp->name);
139
140 /* Set up the switch. */
141 sp->nextdisp = new;
142 F_SET(sp, SC_SSWITCH);
143
144 return (0);
145 }
146