1 /* $NetBSD: var.h,v 1.18 2000/05/22 10:18:47 elric Exp $ */ 2 3 /*- 4 * Copyright (c) 1991, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Kenneth Almquist. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the University of 21 * California, Berkeley and its contributors. 22 * 4. Neither the name of the University nor the names of its contributors 23 * may be used to endorse or promote products derived from this software 24 * without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 * SUCH DAMAGE. 37 * 38 * @(#)var.h 8.2 (Berkeley) 5/4/95 39 */ 40 41 /* 42 * Shell variables. 43 */ 44 45 /* flags */ 46 #define VEXPORT 0x01 /* variable is exported */ 47 #define VREADONLY 0x02 /* variable cannot be modified */ 48 #define VSTRFIXED 0x04 /* variable struct is staticly allocated */ 49 #define VTEXTFIXED 0x08 /* text is staticly allocated */ 50 #define VSTACK 0x10 /* text is allocated on the stack */ 51 #define VUNSET 0x20 /* the variable is not set */ 52 #define VNOFUNC 0x40 /* don't call the callback function */ 53 54 55 struct var { 56 struct var *next; /* next entry in hash list */ 57 int flags; /* flags are defined above */ 58 char *text; /* name=value */ 59 void (*func) __P((const char *)); 60 /* function to be called when */ 61 /* the variable gets set/unset */ 62 }; 63 64 65 struct localvar { 66 struct localvar *next; /* next local variable in list */ 67 struct var *vp; /* the variable that was made local */ 68 int flags; /* saved flags */ 69 char *text; /* saved text */ 70 }; 71 72 73 struct localvar *localvars; 74 75 #if ATTY 76 extern struct var vatty; 77 #endif 78 extern struct var vifs; 79 extern struct var vmail; 80 extern struct var vmpath; 81 extern struct var vpath; 82 extern struct var vps1; 83 extern struct var vps2; 84 #ifndef SMALL 85 extern struct var vterm; 86 extern struct var vtermcap; 87 extern struct var vhistsize; 88 #endif 89 90 /* 91 * The following macros access the values of the above variables. 92 * They have to skip over the name. They return the null string 93 * for unset variables. 94 */ 95 96 #define ifsval() (vifs.text + 4) 97 #define ifsset() ((vifs.flags & VUNSET) == 0) 98 #define mailval() (vmail.text + 5) 99 #define mpathval() (vmpath.text + 9) 100 #define pathval() (vpath.text + 5) 101 #define ps1val() (vps1.text + 4) 102 #define ps2val() (vps2.text + 4) 103 #define optindval() (voptind.text + 7) 104 #ifndef SMALL 105 #define histsizeval() (vhistsize.text + 9) 106 #define termval() (vterm.text + 5) 107 #endif 108 109 #if ATTY 110 #define attyset() ((vatty.flags & VUNSET) == 0) 111 #endif 112 #define mpathset() ((vmpath.flags & VUNSET) == 0) 113 114 void initvar __P((void)); 115 void setvar __P((const char *, const char *, int)); 116 void setvareq __P((char *, int)); 117 struct strlist; 118 void listsetvar __P((struct strlist *)); 119 char *lookupvar __P((const char *)); 120 char *bltinlookup __P((const char *, int)); 121 char **environment __P((void)); 122 void shprocvar __P((void)); 123 int showvarscmd __P((int, char **)); 124 int exportcmd __P((int, char **)); 125 int localcmd __P((int, char **)); 126 void mklocal __P((char *)); 127 void poplocalvars __P((void)); 128 int setvarcmd __P((int, char **)); 129 int unsetcmd __P((int, char **)); 130 int unsetvar __P((const char *)); 131 int setvarsafe __P((const char *, const char *, int)); 132