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1.5 ! millert 1: /* $OpenBSD: parser2.c,v 1.4 2001/11/19 19:02:18 mpech Exp $ */
1.1 deraadt 2: /* $NetBSD: parser2.c,v 1.3 1995/09/28 10:34:32 tls Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
1.5 ! millert 19: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)parser2.c 8.1 (Berkeley) 6/6/93";
39: #else
1.5 ! millert 40: static char rcsid[] = "$OpenBSD: parser2.c,v 1.4 2001/11/19 19:02:18 mpech Exp $";
1.1 deraadt 41: #endif
42: #endif /* not lint */
43:
44: #include "parser.h"
45: #include "var.h"
46: #include "lcmd.h"
47: #include "alias.h"
48:
49: /*
50: * name == 0 means we don't have a function name but
51: * want to parse the arguments anyway. flag == 0 in this case.
52: */
53: p_function(name, v, flag)
54: char *name;
1.4 mpech 55: struct value *v;
1.1 deraadt 56: {
57: struct value t;
1.4 mpech 58: struct lcmd_tab *c = 0;
59: struct alias *a = 0;
60: struct lcmd_arg *ap; /* this arg */
1.1 deraadt 61: struct lcmd_arg *lp = 0; /* list arg */
1.4 mpech 62: int i;
1.1 deraadt 63: struct value av[LCMD_NARG + 1];
1.4 mpech 64: struct value *vp;
1.1 deraadt 65:
66: if (name != 0)
67: if (c = lcmd_lookup(name))
68: name = c->lc_name;
69: else if (a = alias_lookup(name))
70: name = a->a_name;
71: else {
72: p_error("%s: No such command or alias.", name);
73: flag = 0;
74: }
75:
76: for (vp = av; vp < &av[LCMD_NARG + 1]; vp++)
77: vp->v_type = V_ERR;
78:
79: if (token == T_LP)
80: (void) s_gettok();
81: i = 0;
82: for (;;) {
83: ap = 0;
84: vp = 0;
85: if (token == T_COMMA) /* null argument */
86: t.v_type = V_ERR;
87: else {
88: if (p_expr0(&t, flag) < 0)
89: break;
90: if (t.v_type == V_ERR)
91: flag = 0;
92: }
93: if (token != T_ASSIGN) {
94: if (i >= LCMD_NARG ||
95: c != 0 && (ap = lp) == 0 &&
96: (ap = c->lc_arg + i)->arg_name == 0) {
97: p_error("%s: Too many arguments.", name);
98: flag = 0;
99: } else
100: vp = &av[i++];
101: } else {
102: char *tmp;
103: if (p_convstr(&t) < 0)
104: goto abort;
105: tmp = t.v_type == V_STR ? t.v_str : 0;
106: (void) s_gettok();
107: if (p_expr(&t, flag) < 0) {
108: if (tmp)
109: str_free(tmp);
110: p_synerror();
111: goto abort;
112: }
113: if (t.v_type == V_ERR)
114: flag = 0;
115: if (tmp) {
116: if (c == 0) {
117: /* an aliase */
118: p_error("%s: Bad alias syntax.", name);
119: flag = 0;
120: } else {
121: for (ap = c->lc_arg, vp = av;
122: ap != 0 && ap->arg_name != 0 &&
123: (*ap->arg_name == '\0' ||
124: !str_match(tmp, ap->arg_name,
125: ap->arg_minlen));
126: ap++, vp++)
127: ;
128: if (ap == 0 || ap->arg_name == 0) {
129: p_error("%s: Unknown argument \"%s\".",
130: name, tmp);
131: flag = 0;
132: ap = 0;
133: vp = 0;
134: }
135: }
136: str_free(tmp);
137: }
138: }
139: if (ap != 0) {
140: if (ap->arg_flags & ARG_LIST) {
141: i = vp - av + 1;
142: lp = ap;
143: }
144: if (vp->v_type != V_ERR) {
145: if (*ap->arg_name)
146: p_error("%s: Argument %d (%s) duplicated.",
147: name, vp - av + 1,
148: ap->arg_name);
149: else
150: p_error("%s: Argument %d duplicated.",
151: name, vp - av + 1);
152: flag = 0;
153: vp = 0;
154: } else if (t.v_type == V_ERR) {
155: /* do nothing */
156: } else if ((ap->arg_flags&ARG_TYPE) == ARG_NUM &&
157: t.v_type != V_NUM ||
158: (ap->arg_flags&ARG_TYPE) == ARG_STR &&
159: t.v_type != V_STR) {
160: if (*ap->arg_name)
161: p_error("%s: Argument %d (%s) type mismatch.",
162: name, vp - av + 1,
163: ap->arg_name);
164: else
165: p_error("%s: Argument %d type mismatch.",
166: name, vp - av + 1);
167: flag = 0;
168: vp = 0;
169: }
170: }
171: if (vp != 0)
172: *vp = t;
173: else
174: val_free(t);
175: if (token == T_COMMA)
176: (void) s_gettok();
177: }
178:
179: if (p_erred())
180: flag = 0;
181: if (token == T_RP)
182: (void) s_gettok();
183: else if (token != T_EOL && token != T_EOF)
184: flag = 0; /* look for legal follow set */
185: v->v_type = V_ERR;
186: if (flag)
187: if (c != 0)
188: (*c->lc_func)(v, av);
189: else
190: if (a->a_flags & A_INUSE)
191: p_error("%s: Recursive alias.", a->a_name);
192: else {
193: a->a_flags |= A_INUSE;
194: if (dolongcmd(a->a_buf, av, i) < 0)
195: p_memerror();
196: a->a_flags &= ~A_INUSE;
197: }
198: if (p_abort()) {
199: val_free(*v);
200: v->v_type = V_ERR;
201: goto abort;
202: }
203: for (vp = av; vp < &av[LCMD_NARG]; vp++)
204: val_free(*vp);
205: return 0;
206: abort:
207: for (vp = av; vp < &av[LCMD_NARG]; vp++)
208: val_free(*vp);
209: return -1;
210: }
211:
212: p_assign(name, v, flag)
213: char *name;
214: struct value *v;
215: char flag;
216: {
217: (void) s_gettok();
218:
219: if (p_expr(v, flag) < 0) {
220: p_synerror();
221: return -1;
222: }
223: switch (v->v_type) {
224: case V_STR:
225: case V_NUM:
226: if (flag && var_set(name, v) == 0) {
227: p_memerror();
228: val_free(*v);
229: return -1;
230: }
231: break;
232: }
233: return 0;
234: }