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
|
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* 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[] = "@(#)parser2.c 8.1 (Berkeley) 6/6/93";
static char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
#include "parser.h"
#include "var.h"
#include "lcmd.h"
#include "alias.h"
/*
* name == 0 means we don't have a function name but
* want to parse the arguments anyway. flag == 0 in this case.
*/
p_function(name, v, flag)
char *name;
register struct value *v;
{
struct value t;
register struct lcmd_tab *c = 0;
register struct alias *a = 0;
register struct lcmd_arg *ap; /* this arg */
struct lcmd_arg *lp = 0; /* list arg */
register i;
struct value av[LCMD_NARG + 1];
register struct value *vp;
if (name != 0)
if (c = lcmd_lookup(name))
name = c->lc_name;
else if (a = alias_lookup(name))
name = a->a_name;
else {
p_error("%s: No such command or alias.", name);
flag = 0;
}
for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
vp->v_type = V_ERR;
if (token == T_LP)
(void) s_gettok();
i = 0;
for (;;) {
ap = 0;
vp = 0;
if (token == T_COMMA) /* null argument */
t.v_type = V_ERR;
else {
if (p_expr0(&t, flag) < 0)
break;
if (t.v_type == V_ERR)
flag = 0;
}
if (token != T_ASSIGN) {
if (i >= LCMD_NARG ||
c != 0 && (ap = lp) == 0 &&
(ap = c->lc_arg + i)->arg_name == 0) {
p_error("%s: Too many arguments.", name);
flag = 0;
} else
vp = &av[i++];
} else {
char *tmp;
if (p_convstr(&t) < 0)
goto abort;
tmp = t.v_type == V_STR ? t.v_str : 0;
(void) s_gettok();
if (p_expr(&t, flag) < 0) {
if (tmp)
str_free(tmp);
p_synerror();
goto abort;
}
if (t.v_type == V_ERR)
flag = 0;
if (tmp) {
if (c == 0) {
/* an aliase */
p_error("%s: Bad alias syntax.", name);
flag = 0;
} else {
for (ap = c->lc_arg, vp = av;
ap != 0 && ap->arg_name != 0 &&
(*ap->arg_name == '\0' ||
!str_match(tmp, ap->arg_name,
ap->arg_minlen));
ap++, vp++)
;
if (ap == 0 || ap->arg_name == 0) {
p_error("%s: Unknown argument \"%s\".",
name, tmp);
flag = 0;
ap = 0;
vp = 0;
}
}
str_free(tmp);
}
}
if (ap != 0) {
if (ap->arg_flags & ARG_LIST) {
i = vp - av + 1;
lp = ap;
}
if (vp->v_type != V_ERR) {
if (*ap->arg_name)
p_error("%s: Argument %d (%s) duplicated.",
name, vp - av + 1,
ap->arg_name);
else
p_error("%s: Argument %d duplicated.",
name, vp - av + 1);
flag = 0;
vp = 0;
} else if (t.v_type == V_ERR) {
/* do nothing */
} else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
t.v_type != V_NUM ||
(ap->arg_flags&ARG_TYPE) == ARG_STR &&
t.v_type != V_STR) {
if (*ap->arg_name)
p_error("%s: Argument %d (%s) type mismatch.",
name, vp - av + 1,
ap->arg_name);
else
p_error("%s: Argument %d type mismatch.",
name, vp - av + 1);
flag = 0;
vp = 0;
}
}
if (vp != 0)
*vp = t;
else
val_free(t);
if (token == T_COMMA)
(void) s_gettok();
}
if (p_erred())
flag = 0;
if (token == T_RP)
(void) s_gettok();
else if (token != T_EOL && token != T_EOF)
flag = 0; /* look for legal follow set */
v->v_type = V_ERR;
if (flag)
if (c != 0)
(*c->lc_func)(v, av);
else
if (a->a_flags & A_INUSE)
p_error("%s: Recursive alias.", a->a_name);
else {
a->a_flags |= A_INUSE;
if (dolongcmd(a->a_buf, av, i) < 0)
p_memerror();
a->a_flags &= ~A_INUSE;
}
if (p_abort()) {
val_free(*v);
v->v_type = V_ERR;
goto abort;
}
for (vp = av; vp < &av[LCMD_NARG]; vp++)
val_free(*vp);
return 0;
abort:
for (vp = av; vp < &av[LCMD_NARG]; vp++)
val_free(*vp);
return -1;
}
p_assign(name, v, flag)
char *name;
struct value *v;
char flag;
{
(void) s_gettok();
if (p_expr(v, flag) < 0) {
p_synerror();
return -1;
}
switch (v->v_type) {
case V_STR:
case V_NUM:
if (flag && var_set(name, v) == 0) {
p_memerror();
val_free(*v);
return -1;
}
break;
}
return 0;
}
|
