projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 401401ed KB |
1 | /*- |
| 2 | * Copyright (c) 1991 The Regents of the University of California. | |
| 3 | * All rights reserved. | |
| 4 | * | |
| 5 | * This code is derived from software contributed to Berkeley by | |
| 6 | * Kenneth Almquist. | |
| 7 | * | |
| 8 | * %sccs.include.redist.c% | |
| 9 | * | |
| 10 | * @(#)var.h 5.1 (Berkeley) %G% | |
| 11 | */ | |
| 12 | ||
| 13 | /* | |
| 14 | * Shell variables. | |
| 15 | */ | |
| 16 | ||
| 17 | /* flags */ | |
| 18 | #define VEXPORT 01 /* variable is exported */ | |
| 19 | #define VREADONLY 02 /* variable cannot be modified */ | |
| 20 | #define VSTRFIXED 04 /* variable struct is staticly allocated */ | |
| 21 | #define VTEXTFIXED 010 /* text is staticly allocated */ | |
| 22 | #define VSTACK 020 /* text is allocated on the stack */ | |
| 23 | #define VUNSET 040 /* the variable is not set */ | |
| 24 | ||
| 25 | ||
| 26 | struct var { | |
| 27 | struct var *next; /* next entry in hash list */ | |
| 28 | int flags; /* flags are defined above */ | |
| 29 | char *text; /* name=value */ | |
| 30 | }; | |
| 31 | ||
| 32 | ||
| 33 | struct localvar { | |
| 34 | struct localvar *next; /* next local variable in list */ | |
| 35 | struct var *vp; /* the variable that was made local */ | |
| 36 | int flags; /* saved flags */ | |
| 37 | char *text; /* saved text */ | |
| 38 | }; | |
| 39 | ||
| 40 | ||
| 41 | struct localvar *localvars; | |
| 42 | ||
| 43 | #if ATTY | |
| 44 | extern struct var vatty; | |
| 45 | #endif | |
| 46 | extern struct var vifs; | |
| 47 | extern struct var vmail; | |
| 48 | extern struct var vmpath; | |
| 49 | extern struct var vpath; | |
| 50 | extern struct var vps1; | |
| 51 | extern struct var vps2; | |
| 52 | #if ATTY | |
| 53 | extern struct var vterm; | |
| 54 | #endif | |
| 55 | ||
| 56 | /* | |
| 57 | * The following macros access the values of the above variables. | |
| 58 | * They have to skip over the name. They return the null string | |
| 59 | * for unset variables. | |
| 60 | */ | |
| 61 | ||
| 62 | #define ifsval() (vifs.text + 4) | |
| 63 | #define mailval() (vmail.text + 5) | |
| 64 | #define mpathval() (vmpath.text + 9) | |
| 65 | #define pathval() (vpath.text + 5) | |
| 66 | #define ps1val() (vps1.text + 4) | |
| 67 | #define ps2val() (vps2.text + 4) | |
| 68 | #if ATTY | |
| 69 | #define termval() (vterm.text + 5) | |
| 70 | #endif | |
| 71 | ||
| 72 | #if ATTY | |
| 73 | #define attyset() ((vatty.flags & VUNSET) == 0) | |
| 74 | #endif | |
| 75 | #define mpathset() ((vmpath.flags & VUNSET) == 0) | |
| 76 | ||
| 77 | ||
| 78 | #ifdef __STDC__ | |
| 79 | void initvar(); | |
| 80 | void setvar(char *, char *, int); | |
| 81 | void setvareq(char *, int); | |
| 82 | struct strlist; | |
| 83 | void listsetvar(struct strlist *); | |
| 84 | char *lookupvar(char *); | |
| 85 | char *bltinlookup(char *, int); | |
| 86 | char **environment(); | |
| 87 | int showvarscmd(int, char **); | |
| 88 | void mklocal(char *); | |
| 89 | void poplocalvars(void); | |
| 90 | #else | |
| 91 | void initvar(); | |
| 92 | void setvar(); | |
| 93 | void setvareq(); | |
| 94 | void listsetvar(); | |
| 95 | char *lookupvar(); | |
| 96 | char *bltinlookup(); | |
| 97 | char **environment(); | |
| 98 | int showvarscmd(); | |
| 99 | void mklocal(); | |
| 100 | void poplocalvars(); | |
| 101 | #endif |