1 /*- 2 * Copyright (c) 1991, 1993 3 * The Regents of the University of California. 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 * 4. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)var.h 8.2 (Berkeley) 5/4/95 33 * $FreeBSD$ 34 */ 35 36 /* 37 * Shell variables. 38 */ 39 40 /* flags */ 41 #define VEXPORT 0x01 /* variable is exported */ 42 #define VREADONLY 0x02 /* variable cannot be modified */ 43 #define VSTRFIXED 0x04 /* variable struct is statically allocated */ 44 #define VTEXTFIXED 0x08 /* text is statically allocated */ 45 #define VSTACK 0x10 /* text is allocated on the stack */ 46 #define VUNSET 0x20 /* the variable is not set */ 47 #define VNOFUNC 0x40 /* don't call the callback function */ 48 #define VNOSET 0x80 /* do not set variable - just readonly test */ 49 #define VNOLOCAL 0x100 /* ignore forcelocal */ 50 51 52 struct var { 53 struct var *next; /* next entry in hash list */ 54 int flags; /* flags are defined above */ 55 int name_len; /* length of name */ 56 char *text; /* name=value */ 57 void (*func)(const char *); 58 /* function to be called when */ 59 /* the variable gets set/unset */ 60 }; 61 62 63 struct localvar { 64 struct localvar *next; /* next local variable in list */ 65 struct var *vp; /* the variable that was made local */ 66 int flags; /* saved flags */ 67 char *text; /* saved text */ 68 }; 69 70 71 extern struct localvar *localvars; 72 extern int forcelocal; 73 74 extern struct var vifs; 75 extern struct var vmail; 76 extern struct var vmpath; 77 extern struct var vpath; 78 extern struct var vps1; 79 extern struct var vps2; 80 extern struct var vps4; 81 extern struct var vdisvfork; 82 #ifndef NO_HISTORY 83 extern struct var vhistsize; 84 extern struct var vterm; 85 #endif 86 87 extern int localeisutf8; 88 /* The parser uses the locale that was in effect at startup. */ 89 extern int initial_localeisutf8; 90 91 /* 92 * The following macros access the values of the above variables. 93 * They have to skip over the name. They return the null string 94 * for unset variables. 95 */ 96 97 #define ifsval() (vifs.text + 4) 98 #define ifsset() ((vifs.flags & VUNSET) == 0) 99 #define mailval() (vmail.text + 5) 100 #define mpathval() (vmpath.text + 9) 101 #define pathval() (vpath.text + 5) 102 #define ps1val() (vps1.text + 4) 103 #define ps2val() (vps2.text + 4) 104 #define ps4val() (vps4.text + 4) 105 #define optindval() (voptind.text + 7) 106 #ifndef NO_HISTORY 107 #define histsizeval() (vhistsize.text + 9) 108 #define termval() (vterm.text + 5) 109 #endif 110 111 #define mpathset() ((vmpath.flags & VUNSET) == 0) 112 #define disvforkset() ((vdisvfork.flags & VUNSET) == 0) 113 114 void initvar(void); 115 void setvar(const char *, const char *, int); 116 void setvareq(char *, int); 117 struct arglist; 118 void listsetvar(struct arglist *, int); 119 char *lookupvar(const char *); 120 char *bltinlookup(const char *, int); 121 void bltinsetlocale(void); 122 void bltinunsetlocale(void); 123 void updatecharset(void); 124 void initcharset(void); 125 char **environment(void); 126 int showvarscmd(int, char **); 127 void mklocal(char *); 128 void poplocalvars(void); 129 int unsetvar(const char *); 130 int setvarsafe(const char *, const char *, int); 131