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
|
/* $Id: table.h,v 1.3 1994/05/31 13:34:34 michael Exp $ */
/*
* generic hashed associative table for commands and variables.
*/
struct table {
Area *areap; /* area to allocate entries */
short size, nfree; /* hash size (always 2^^n), free entries */
struct tbl **tbls; /* hashed table items */
void *root; /* b-treed table items */
};
struct tbl { /* table item */
Tflag flag; /* flags */
int type; /* command type (see below), base (if INTEGER),
* or offset from val.s of value (if EXPORT) */
Area *areap; /* area to allocate from */
union {
char *s; /* string */
long i; /* integer */
int (*f) ARGS((int, char **, int)); /* int function */
struct op *t; /* "function" tree */
} val; /* value */
int index; /* index for an array */
union {
int field; /* field with for -L/-R/-Z */
int errno_; /* CEXEC/CTALIAS */
} u2;
union {
struct tbl *array; /* array values */
char *fpath; /* temporary path to undef function */
} u;
char name[4]; /* name -- variable length */
};
/* common flag bits */
#define ALLOC BIT(0) /* val.s has been allocated */
#define DEFINED BIT(1) /* is defined in block */
#define ISSET BIT(2) /* has value, vp->val.[si] */
#define EXPORT BIT(3) /* exported variable/function */
#define TRACE BIT(4) /* var: user flagged, func: execution tracing */
/* (start non-common flags at 8) */
/* flag bits used for variables */
#define SPECIAL BIT(8) /* PATH, IFS, SECONDS, etc */
#define INTEGER BIT(9) /* val.i contains integer value */
#define RDONLY BIT(10) /* read-only variable */
#define LOCAL BIT(11) /* for local typeset() */
#define ARRAY BIT(13) /* array */
#define IMPORT BIT(21) /* flag to typeset(): no arrays, must have = */
#define LOCAL_COPY BIT(22) /* with LOCAL - copy attrs from existing var */
#define EXPRINEVAL BIT(23) /* contents currently being evaluated */
#define EXPRLVALUE BIT(24) /* useable as lvalue (temp flag) */
/* flag bits used for builtins/aliases/keywords/functions */
#define KEEPASN BIT(8) /* keep command assignments (eg, var=x cmd) */
#define FINUSE BIT(9) /* function being executed */
#define FDELETE BIT(10) /* function deleted while it was executing */
#define SPEC_BI BIT(12) /* a POSIX special builtin */
#define REG_BI BIT(13) /* a POSIX regular builtin */
#define POSH_BUILTIN_KEEPASN BIT(8)
#define POSH_BUILTIN_POSIX_SPECIAL BIT(12)
#define POSH_BUILTIN_POSIX_REGULAR BIT(13)
#define POSH_BUILTIN_FALSE BIT(14)
#define POSH_BUILTIN_EXPORT BIT(15)
#define POSH_BUILTIN_READONLY BIT(16)
#define POSH_BUILTIN_SET BIT(17)
#define POSH_BUILTIN_EXIT BIT(18)
#define POSH_BUILTIN_RETURN BIT(19)
#define POSH_BUILTIN_BREAK BIT(20)
#define POSH_BUILTIN_CONTINUE BIT(21)
/* Attributes that can be set by the user (used to decide if an unset param
* should be repoted by set/typeset). Does not include ARRAY or LOCAL.
*/
#define USERATTRIB (EXPORT|INTEGER|RDONLY)
/* command types */
#define CNONE 0 /* undefined */
#define CSHELL 1 /* built-in */
#define CFUNC 2 /* function */
#define CEXEC 4 /* executable command */
#define CALIAS 5 /* alias */
#define CKEYWD 6 /* keyword */
#define CTALIAS 7 /* tracked alias */
/* Flags for findcom()/comexec() */
#define FC_SPECBI BIT(0) /* special builtin */
#define FC_FUNC BIT(1) /* function builtin */
#define FC_REGBI BIT(2) /* regular builtin */
#define FC_UNREGBI BIT(3) /* un-regular builtin (!special,!regular) */
#define FC_BI (FC_SPECBI|FC_REGBI|FC_UNREGBI)
#define FC_PATH BIT(4) /* do path search */
#define FC_DEFPATH BIT(5) /* use default path in path search */
#define AF_ARGV_ALLOC 0x1 /* argv[] array allocated */
#define AF_ARGS_ALLOCED 0x2 /* argument strings allocated */
#define AI_ARGV(a, i) ((i) == 0 ? (a).argv[0] : (a).argv[(i) - (a).skip])
#define AI_ARGC(a) ((a).argc_ - (a).skip)
/* Argument info. Used for $#, $* for shell, functions, includes, etc. */
struct arg_info {
int flags; /* AF_* */
char **argv;
int argc_;
int skip; /* first arg is argv[0], second is argv[1 + skip] */
};
/*
* activation record for function blocks
*/
struct block {
Area area; /* area to allocate things */
/*struct arg_info argi;*/
char **argv;
int argc;
int flags; /* see BF_* */
struct table vars; /* local variables */
struct table funs; /* local functions */
LameGetopt getopts_state;
#if 1
char * error; /* error handler */
char * exit; /* exit handler */
#else
Trap error, exit;
#endif
struct block *next; /* enclosing block */
};
/* Values for struct block.flags */
#define BF_DOGETOPTS BIT(0) /* save/restore getopts state */
/*
* Used by twalk() and tnext() routines.
*/
struct tstate {
int left;
struct tbl **next;
};
EXTERN struct table builtins; /* built-in commands */
EXTERN struct table aliases; /* aliases */
EXTERN struct table keywords; /* keywords */
struct builtin {
const char *name;
int (*func) ARGS((int, char **, int));
int flags;
};
/* these really are externs! Look in table.c for them */
extern const struct builtin shbuiltins [];
/* var spec values */
#define V_NONE 0
#define V_PATH 1
#define V_IFS 2
#define V_SECONDS 3
#define V_OPTIND 4
#define V_MAIL 5
#define V_MAILPATH 6
#define V_MAILCHECK 7
#define V_RANDOM 8
#define V_HISTSIZE 9
#define V_HISTFILE 10
#define V_VISUAL 11
#define V_EDITOR 12
#define V_COLUMNS 13
#define V_POSIXLY_CORRECT 14
#define V_TMOUT 15
#define V_TMPDIR 16
#define V_LINENO 17
/* values for set_prompt() */
#define PS1 0 /* command */
#define PS2 1 /* command continuation */
EXTERN char *path; /* copy of either PATH or def_path */
EXTERN const char *def_path; /* path to use if PATH not set */
EXTERN char *tmpdir; /* TMPDIR value */
EXTERN const char *prompt;
EXTERN int cur_prompt; /* PS1 or PS2 */
EXTERN int current_lineno; /* LINENO value */
|
