projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 15637ed4 RG |
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 | * Redistribution and use in source and binary forms, with or without | |
| 9 | * modification, are permitted provided that the following conditions | |
| 10 | * are met: | |
| 11 | * 1. Redistributions of source code must retain the above copyright | |
| 12 | * notice, this list of conditions and the following disclaimer. | |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright | |
| 14 | * notice, this list of conditions and the following disclaimer in the | |
| 15 | * documentation and/or other materials provided with the distribution. | |
| 16 | * 3. All advertising materials mentioning features or use of this software | |
| 17 | * must display the following acknowledgement: | |
| 18 | * This product includes software developed by the University of | |
| 19 | * California, Berkeley and its contributors. | |
| 20 | * 4. Neither the name of the University nor the names of its contributors | |
| 21 | * may be used to endorse or promote products derived from this software | |
| 22 | * without specific prior written permission. | |
| 23 | * | |
| 24 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND | |
| 25 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 26 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE | |
| 27 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
| 28 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL | |
| 29 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS | |
| 30 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
| 31 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT | |
| 32 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY | |
| 33 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF | |
| 34 | * SUCH DAMAGE. | |
| 35 | * | |
| 78ed81a3 | 36 | * from: @(#)var.h 5.1 (Berkeley) 3/7/91 |
| 37 | * var.h,v 1.4 1993/08/01 18:58:33 mycroft Exp | |
| 15637ed4 RG |
38 | */ |
| 39 | ||
| 40 | /* | |
| 41 | * Shell variables. | |
| 42 | */ | |
| 43 | ||
| 44 | /* flags */ | |
| 45 | #define VEXPORT 01 /* variable is exported */ | |
| 46 | #define VREADONLY 02 /* variable cannot be modified */ | |
| 47 | #define VSTRFIXED 04 /* variable struct is staticly allocated */ | |
| 48 | #define VTEXTFIXED 010 /* text is staticly allocated */ | |
| 49 | #define VSTACK 020 /* text is allocated on the stack */ | |
| 50 | #define VUNSET 040 /* the variable is not set */ | |
| 51 | ||
| 52 | ||
| 53 | struct var { | |
| 54 | struct var *next; /* next entry in hash list */ | |
| 55 | int flags; /* flags are defined above */ | |
| 56 | char *text; /* name=value */ | |
| 57 | }; | |
| 58 | ||
| 59 | ||
| 60 | struct localvar { | |
| 61 | struct localvar *next; /* next local variable in list */ | |
| 62 | struct var *vp; /* the variable that was made local */ | |
| 63 | int flags; /* saved flags */ | |
| 64 | char *text; /* saved text */ | |
| 65 | }; | |
| 66 | ||
| 67 | ||
| 68 | struct localvar *localvars; | |
| 69 | ||
| 70 | #if ATTY | |
| 71 | extern struct var vatty; | |
| 72 | #endif | |
| 73 | extern struct var vifs; | |
| 74 | extern struct var vmail; | |
| 75 | extern struct var vmpath; | |
| 76 | extern struct var vpath; | |
| 77 | extern struct var vps1; | |
| 78 | extern struct var vps2; | |
| 79 | #if ATTY | |
| 80 | extern struct var vterm; | |
| 81 | #endif | |
| 82 | ||
| 83 | /* | |
| 84 | * The following macros access the values of the above variables. | |
| 85 | * They have to skip over the name. They return the null string | |
| 86 | * for unset variables. | |
| 87 | */ | |
| 88 | ||
| 89 | #define ifsval() (vifs.text + 4) | |
| 90 | #define mailval() (vmail.text + 5) | |
| 91 | #define mpathval() (vmpath.text + 9) | |
| 92 | #define pathval() (vpath.text + 5) | |
| 93 | #define ps1val() (vps1.text + 4) | |
| 94 | #define ps2val() (vps2.text + 4) | |
| 95 | #if ATTY | |
| 96 | #define termval() (vterm.text + 5) | |
| 97 | #endif | |
| 98 | ||
| 99 | #if ATTY | |
| 100 | #define attyset() ((vatty.flags & VUNSET) == 0) | |
| 101 | #endif | |
| 102 | #define mpathset() ((vmpath.flags & VUNSET) == 0) | |
| 103 | ||
| 104 | ||
| 105 | #ifdef __STDC__ | |
| 106 | void initvar(); | |
| 107 | void setvar(char *, char *, int); | |
| 108 | void setvareq(char *, int); | |
| 109 | struct strlist; | |
| 110 | void listsetvar(struct strlist *); | |
| 111 | char *lookupvar(char *); | |
| 112 | char *bltinlookup(char *, int); | |
| 113 | char **environment(); | |
| 114 | int showvarscmd(int, char **); | |
| 115 | void mklocal(char *); | |
| 116 | void poplocalvars(void); | |
| 117 | #else | |
| 118 | void initvar(); | |
| 119 | void setvar(); | |
| 120 | void setvareq(); | |
| 121 | void listsetvar(); | |
| 122 | char *lookupvar(); | |
| 123 | char *bltinlookup(); | |
| 124 | char **environment(); | |
| 125 | int showvarscmd(); | |
| 126 | void mklocal(); | |
| 127 | void poplocalvars(); | |
| 128 | #endif |