1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*-
* 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_bang.c 8.35 (Berkeley) 8/17/94";
#endif /* not lint */
#include <sys/types.h>
#include <sys/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 <unistd.h>
#include "compat.h"
#include <db.h>
#include <regex.h>
#include "vi.h"
#include "excmd.h"
#include "../sex/sex_screen.h"
/*
* ex_bang -- :[line [,line]] ! command
*
* Pass the rest of the line after the ! character to the program named by
* the O_SHELL option.
*
* Historical vi did NOT do shell expansion on the arguments before passing
* them, only file name expansion. This means that the O_SHELL program got
* "$t" as an argument if that is what the user entered. Also, there's a
* special expansion done for the bang command. Any exclamation points in
* the user's argument are replaced by the last, expanded ! command.
*
* There's some fairly amazing slop in this routine to make the different
* ways of getting here display the right things. It took a long time to
* get it right (wrong?), so be careful.
*/
int
ex_bang(sp, ep, cmdp)
SCR *sp;
EXF *ep;
EXCMDARG *cmdp;
{
enum filtertype ftype;
ARGS *ap;
EX_PRIVATE *exp;
MARK rm;
recno_t lno;
size_t blen;
int rval;
char *bp, *msg;
ap = cmdp->argv[0];
if (ap->len == 0) {
msgq(sp, M_ERR, "Usage: %s", cmdp->cmd->usage);
return (1);
}
/* Set the last bang command. */
exp = EXP(sp);
if (exp->lastbcomm != NULL)
free(exp->lastbcomm);
if ((exp->lastbcomm = strdup(ap->bp)) == NULL) {
msgq(sp, M_SYSERR, NULL);
return (1);
}
/*
* If the command was modified by the expansion, we redisplay it.
* Redisplaying it in vi mode is tricky, and handled separately
* in each case below. If we're in ex mode, it's easy, so we just
* do it here.
*/
bp = NULL;
if (F_ISSET(cmdp, E_MODIFY) && !F_ISSET(sp, S_EXSILENT)) {
if (IN_EX_MODE(sp)) {
(void)ex_printf(EXCOOKIE, "!%s\n", ap->bp);
(void)ex_fflush(EXCOOKIE);
}
/*
* Vi: Display the command if modified. Historic vi displayed
* the command if it was modified due to file name and/or bang
* expansion. If piping lines, it was immediately overwritten
* by any error or line change reporting. We don't the user to
* have to page through the responses, so we only post it until
* it's erased by something else. Otherwise, pass it on to the
* ex_exec_proc routine to display after the screen has been
* cleaned up.
*/
if (IN_VI_MODE(sp)) {
GET_SPACE_RET(sp, bp, blen, ap->len + 3);
bp[0] = '!';
memmove(bp + 1, ap->bp, ap->len);
bp[ap->len + 1] = '\n';
bp[ap->len + 2] = '\0';
}
}
/*
* If addresses were specified, pipe lines from the file through the
* command.
*
* Historically, vi lines were replaced by both the stdout and stderr
* lines of the command, but ex by only the stdout lines. This makes
* no sense to me, so nvi makes it consistent for both, and matches
* vi's historic behavior.
*/
if (cmdp->addrcnt != 0) {
/* Autoprint is set historically, even if the command fails. */
F_SET(exp, EX_AUTOPRINT);
/* Vi gets a busy message. */
if (bp != NULL)
(void)sp->s_busy(sp, bp);
/*
* !!!
* Historical vi permitted "!!" in an empty file. When it
* happens, we get called with two addresses of 1,1 and a
* bad attitude. The simple solution is to turn it into a
* FILTER_READ operation, but that means that we don't put
* an empty line into the default cut buffer as did historic
* vi. Tough.
*/
ftype = FILTER;
if (cmdp->addr1.lno == 1 && cmdp->addr2.lno == 1) {
if (file_lline(sp, ep, &lno))
return (1);
if (lno == 0) {
cmdp->addr1.lno = cmdp->addr2.lno = 0;
ftype = FILTER_READ;
}
}
rval = filtercmd(sp, ep,
&cmdp->addr1, &cmdp->addr2, &rm, ap->bp, ftype);
/*
* If in vi mode, move to the first nonblank.
*
* !!!
* Historic vi wasn't consistent in this area -- if you used
* a forward motion it moved to the first nonblank, but if you
* did a backward motion it didn't. And, if you followed a
* backward motion with a forward motion, it wouldn't move to
* the nonblank for either. Going to the nonblank generally
* seems more useful, so we do it.
*/
if (rval == 0) {
sp->lno = rm.lno;
if (IN_VI_MODE(sp)) {
sp->cno = 0;
(void)nonblank(sp, ep, sp->lno, &sp->cno);
}
}
goto ret2;
}
/*
* If no addresses were specified, run the command. If the file
* has been modified and autowrite is set, write the file back.
* If the file has been modified, autowrite is not set and the
* warn option is set, tell the user about the file.
*/
msg = NULL;
if (F_ISSET(ep, F_MODIFIED))
if (O_ISSET(sp, O_AUTOWRITE)) {
if (file_write(sp, ep, NULL, NULL, NULL, FS_ALL)) {
rval = 1;
goto ret1;
}
} else if (O_ISSET(sp, O_WARN) && !F_ISSET(sp, S_EXSILENT))
msg = "File modified since last write.\n";
/* Run the command. */
rval = ex_exec_proc(sp, ap->bp, bp, msg);
/* Vi requires user permission to continue. */
if (IN_VI_MODE(sp))
F_SET(sp, S_CONTINUE);
ret2: if (IN_EX_MODE(sp)) {
/*
* Put ex error messages out so they aren't confused with
* the autoprint output.
*/
if (rval)
(void)sex_refresh(sp, sp->ep);
/* Ex terminates with a bang, even if the command fails. */
if (!F_ISSET(sp, S_EXSILENT))
(void)write(STDOUT_FILENO, "!\n", 2);
}
/* Free the extra space. */
ret1: if (bp != NULL)
FREE_SPACE(sp, bp, blen);
/*
* XXX
* The ! commands never return an error, so that autoprint always
* happens in the ex parser.
*/
return (0);
}
|
