var.h revision 1.1
1 1.1 cgd /*- 2 1.1 cgd * Copyright (c) 1991 The Regents of the University of California. 3 1.1 cgd * All rights reserved. 4 1.1 cgd * 5 1.1 cgd * This code is derived from software contributed to Berkeley by 6 1.1 cgd * Kenneth Almquist. 7 1.1 cgd * 8 1.1 cgd * Redistribution and use in source and binary forms, with or without 9 1.1 cgd * modification, are permitted provided that the following conditions 10 1.1 cgd * are met: 11 1.1 cgd * 1. Redistributions of source code must retain the above copyright 12 1.1 cgd * notice, this list of conditions and the following disclaimer. 13 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 14 1.1 cgd * notice, this list of conditions and the following disclaimer in the 15 1.1 cgd * documentation and/or other materials provided with the distribution. 16 1.1 cgd * 3. All advertising materials mentioning features or use of this software 17 1.1 cgd * must display the following acknowledgement: 18 1.1 cgd * This product includes software developed by the University of 19 1.1 cgd * California, Berkeley and its contributors. 20 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 21 1.1 cgd * may be used to endorse or promote products derived from this software 22 1.1 cgd * without specific prior written permission. 23 1.1 cgd * 24 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 1.1 cgd * SUCH DAMAGE. 35 1.1 cgd * 36 1.1 cgd * @(#)var.h 5.1 (Berkeley) 3/7/91 37 1.1 cgd */ 38 1.1 cgd 39 1.1 cgd /* 40 1.1 cgd * Shell variables. 41 1.1 cgd */ 42 1.1 cgd 43 1.1 cgd /* flags */ 44 1.1 cgd #define VEXPORT 01 /* variable is exported */ 45 1.1 cgd #define VREADONLY 02 /* variable cannot be modified */ 46 1.1 cgd #define VSTRFIXED 04 /* variable struct is staticly allocated */ 47 1.1 cgd #define VTEXTFIXED 010 /* text is staticly allocated */ 48 1.1 cgd #define VSTACK 020 /* text is allocated on the stack */ 49 1.1 cgd #define VUNSET 040 /* the variable is not set */ 50 1.1 cgd 51 1.1 cgd 52 1.1 cgd struct var { 53 1.1 cgd struct var *next; /* next entry in hash list */ 54 1.1 cgd int flags; /* flags are defined above */ 55 1.1 cgd char *text; /* name=value */ 56 1.1 cgd }; 57 1.1 cgd 58 1.1 cgd 59 1.1 cgd struct localvar { 60 1.1 cgd struct localvar *next; /* next local variable in list */ 61 1.1 cgd struct var *vp; /* the variable that was made local */ 62 1.1 cgd int flags; /* saved flags */ 63 1.1 cgd char *text; /* saved text */ 64 1.1 cgd }; 65 1.1 cgd 66 1.1 cgd 67 1.1 cgd struct localvar *localvars; 68 1.1 cgd 69 1.1 cgd #if ATTY 70 1.1 cgd extern struct var vatty; 71 1.1 cgd #endif 72 1.1 cgd extern struct var vifs; 73 1.1 cgd extern struct var vmail; 74 1.1 cgd extern struct var vmpath; 75 1.1 cgd extern struct var vpath; 76 1.1 cgd extern struct var vps1; 77 1.1 cgd extern struct var vps2; 78 1.1 cgd #if ATTY 79 1.1 cgd extern struct var vterm; 80 1.1 cgd #endif 81 1.1 cgd 82 1.1 cgd /* 83 1.1 cgd * The following macros access the values of the above variables. 84 1.1 cgd * They have to skip over the name. They return the null string 85 1.1 cgd * for unset variables. 86 1.1 cgd */ 87 1.1 cgd 88 1.1 cgd #define ifsval() (vifs.text + 4) 89 1.1 cgd #define mailval() (vmail.text + 5) 90 1.1 cgd #define mpathval() (vmpath.text + 9) 91 1.1 cgd #define pathval() (vpath.text + 5) 92 1.1 cgd #define ps1val() (vps1.text + 4) 93 1.1 cgd #define ps2val() (vps2.text + 4) 94 1.1 cgd #if ATTY 95 1.1 cgd #define termval() (vterm.text + 5) 96 1.1 cgd #endif 97 1.1 cgd 98 1.1 cgd #if ATTY 99 1.1 cgd #define attyset() ((vatty.flags & VUNSET) == 0) 100 1.1 cgd #endif 101 1.1 cgd #define mpathset() ((vmpath.flags & VUNSET) == 0) 102 1.1 cgd 103 1.1 cgd 104 1.1 cgd #ifdef __STDC__ 105 1.1 cgd void initvar(); 106 1.1 cgd void setvar(char *, char *, int); 107 1.1 cgd void setvareq(char *, int); 108 1.1 cgd struct strlist; 109 1.1 cgd void listsetvar(struct strlist *); 110 1.1 cgd char *lookupvar(char *); 111 1.1 cgd char *bltinlookup(char *, int); 112 1.1 cgd char **environment(); 113 1.1 cgd int showvarscmd(int, char **); 114 1.1 cgd void mklocal(char *); 115 1.1 cgd void poplocalvars(void); 116 1.1 cgd #else 117 1.1 cgd void initvar(); 118 1.1 cgd void setvar(); 119 1.1 cgd void setvareq(); 120 1.1 cgd void listsetvar(); 121 1.1 cgd char *lookupvar(); 122 1.1 cgd char *bltinlookup(); 123 1.1 cgd char **environment(); 124 1.1 cgd int showvarscmd(); 125 1.1 cgd void mklocal(); 126 1.1 cgd void poplocalvars(); 127 1.1 cgd #endif 128
Indexes created Fri Sep 26 20:09:58 GMT 2025