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
|
/***********************************************************************
* *
* This software is part of the ast package *
* Copyright (c) 1982-2007 AT&T Knowledge Ventures *
* and is licensed under the *
* Common Public License, Version 1.0 *
* by AT&T Knowledge Ventures *
* *
* A copy of the License is available at *
* http://www.opensource.org/licenses/cpl1.0.txt *
* (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) *
* *
* Information and Software Systems Research *
* AT&T Research *
* Florham Park NJ *
* *
* David Korn <dgk@research.att.com> *
* *
***********************************************************************/
#pragma prototyped
#ifndef _SHNODES_H
#define _SHNODES_H 1
/*
* UNIX shell
* Written by David Korn
*
*/
#include <ast.h>
#include "argnod.h"
/* command tree for tretyp */
#define FINT (02<<COMBITS) /* non-interruptable */
#define FAMP (04<<COMBITS) /* background */
#define FPIN (010<<COMBITS) /* input is a pipe */
#define FPOU (040<<COMBITS) /* output is a pipe */
#define FPCL (0100<<COMBITS) /* close the pipe */
#define FCOOP (0200<<COMBITS) /* cooperating process */
#define FSHOWME (0400<<COMBITS) /* set for showme commands */
#define FPOSIX (02<<COMBITS) /* posix semantics function */
#define FLINENO (04<<COMBITS) /* for/case has line number */
#define TNEGATE (01<<COMBITS) /* ! inside [[...]] */
#define TBINARY (02<<COMBITS) /* binary operator in [[...]] */
#define TUNARY (04<<COMBITS) /* unary operator in [[...]] */
#define TTEST (010<<COMBITS)
#define TPAREN (TBINARY|TUNARY)
#define TSHIFT (COMBITS+4)
#define TNSPACE (TFUN|COMSCAN)
#define TCOM 0
#define TPAR 1
#define TFIL 2
#define TLST 3
#define TIF 4
#define TWH 5
#define TUN (TWH|COMSCAN)
#define TTST 6
#define TSW 7
#define TAND 8
#define TORF 9
#define TFORK 10
#define TFOR 11
#define TSELECT (TFOR|COMSCAN)
#define TARITH 12
#define TTIME 13
#define TSETIO 14
#define TFUN 15
/* this node is a proforma for those that follow */
struct trenod
{
int tretyp;
struct ionod *treio;
};
struct forknod
{
int forktyp;
struct ionod *forkio;
Shnode_t *forktre;
int forkline;
};
struct ifnod
{
int iftyp;
Shnode_t *iftre;
Shnode_t *thtre;
Shnode_t *eltre;
};
struct whnod
{
int whtyp;
Shnode_t *whtre;
Shnode_t *dotre;
struct arithnod *whinc;
};
struct fornod
{
int fortyp;
char *fornam;
Shnode_t *fortre;
struct comnod *forlst;
int forline;
};
struct swnod
{
int swtyp;
struct argnod *swarg;
struct regnod *swlst;
struct ionod *swio;
int swline;
};
struct regnod
{
struct argnod *regptr;
Shnode_t *regcom;
struct regnod *regnxt;
char regflag;
};
struct parnod
{
int partyp;
Shnode_t *partre;
};
struct lstnod
{
int lsttyp;
Shnode_t *lstlef;
Shnode_t *lstrit;
};
/* tst is same as lst, but with extra field for line number */
struct tstnod
{
struct lstnod tstlst;
int tstline;
};
struct functnod
{
int functtyp;
char *functnam;
Shnode_t *functtre;
int functline;
off_t functloc;
struct slnod *functstak;
struct comnod *functargs;
};
struct arithnod
{
int artyp;
int arline;
struct argnod *arexpr;
void *arcomp;
};
/* types of ionodes stored in iofile */
#define IOUFD 0x3f /* file descriptor number mask */
#define IOPUT 0x40 /* > redirection operator */
#define IOAPP 0x80 /* >> redirection operator */
#define IODOC 0x100 /* << redirection operator */
#define IOMOV 0x200 /* <& or >& operators */
#define IOCLOB 0x400 /* noclobber bit */
#define IORDW 0x800 /* <> redirection operator */
#define IORAW 0x1000 /* no expansion needed for filename */
#define IOSTRG 0x2000 /* here-document stored as incore string */
#define IOSTRIP 0x4000 /* strip leading tabs for here-document */
#define IOQUOTE 0x8000 /* here-document delimiter was quoted */
#define IOVNM 0x10000 /* iovname field is non-zero */
#define IOLSEEK 0x20000 /* seek operators <# or ># */
#define IOARITH 0x40000 /* arithmetic seek <# ((expr)) */
#define IOCOPY IOCLOB /* copy skipped lines onto standard output */
union Shnode_u
{
struct argnod arg;
struct ionod io;
struct whnod wh;
struct swnod sw;
struct ifnod if_;
struct dolnod dol;
struct comnod com;
struct trenod tre;
struct forknod fork;
struct fornod for_;
struct regnod reg;
struct parnod par;
struct lstnod lst;
struct tstnod tst;
struct functnod funct;
struct arithnod ar;
};
extern void sh_freeup(void);
extern void sh_funstaks(struct slnod*,int);
extern Sfio_t *sh_subshell(Shnode_t*, int, int);
#if defined(__EXPORT__) && defined(_BLD_DLL) && defined(_BLD_shell)
__EXPORT__
#endif
extern int sh_tdump(Sfio_t*, const Shnode_t*);
extern Shnode_t *sh_dolparen(void);
extern Shnode_t *sh_trestore(Sfio_t*);
#if SHOPT_KIA
extern int kiaclose(void);
extern unsigned long kiaentity(const char*,int,int,int,int,unsigned long,int,int,const char*);
#endif /* SHOPT_KIA */
#endif /* _SHNODES_H */
|
