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 * 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 * 36 * @(#)var.h 8.2 (Berkeley) 5/4/95 37 * $FreeBSD: head/bin/sh/var.h 230998 2012-02-04 23:12:14Z jilles $ 38 */ 39 40 /* 41 * Shell variables. 42 */ 43 44 /* flags */ 45 #define VEXPORT 0x01 /* variable is exported */ 46 #define VREADONLY 0x02 /* variable cannot be modified */ 47 #define VSTRFIXED 0x04 /* variable struct is statically allocated */ 48 #define VTEXTFIXED 0x08 /* text is statically allocated */ 49 #define VSTACK 0x10 /* text is allocated on the stack */ 50 #define VUNSET 0x20 /* the variable is not set */ 51 #define VNOFUNC 0x40 /* don't call the callback function */ 52 #define VNOSET 0x80 /* do not set variable - just readonly test */ 53 #define VNOLOCAL 0x100 /* ignore forcelocal */ 54 55 56 struct var { 57 struct var *next; /* next entry in hash list */ 58 int flags; /* flags are defined above */ 59 int name_len; /* length of name */ 60 char *text; /* name=value */ 61 void (*func)(const char *); 62 /* function to be called when */ 63 /* the variable gets set/unset */ 64 }; 65 66 67 struct localvar { 68 struct localvar *next; /* next local variable in list */ 69 struct var *vp; /* the variable that was made local */ 70 int flags; /* saved flags */ 71 char *text; /* saved text */ 72 }; 73 74 75 struct localvar *localvars; 76 extern int forcelocal; 77 78 extern struct var vifs; 79 extern struct var vmail; 80 extern struct var vmpath; 81 extern struct var vpath; 82 extern struct var vppid; 83 extern struct var vps1; 84 extern struct var vps2; 85 extern struct var vps4; 86 extern struct var vdisvfork; 87 #ifndef NO_HISTORY 88 extern struct var vhistsize; 89 extern struct var vterm; 90 #endif 91 92 extern int localeisutf8; 93 /* The parser uses the locale that was in effect at startup. */ 94 extern int initial_localeisutf8; 95 96 /* 97 * The following macros access the values of the above variables. 98 * They have to skip over the name. They return the null string 99 * for unset variables. 100 */ 101 102 #define ifsval() (vifs.text + 4) 103 #define ifsset() ((vifs.flags & VUNSET) == 0) 104 #define mailval() (vmail.text + 5) 105 #define mpathval() (vmpath.text + 9) 106 #define pathval() (vpath.text + 5) 107 #define ps1val() (vps1.text + 4) 108 #define ps2val() (vps2.text + 4) 109 #define ps4val() (vps4.text + 4) 110 #define optindval() (voptind.text + 7) 111 #ifndef NO_HISTORY 112 #define histsizeval() (vhistsize.text + 9) 113 #define termval() (vterm.text + 5) 114 #endif 115 116 #define mpathset() ((vmpath.flags & VUNSET) == 0) 117 #define disvforkset() ((vdisvfork.flags & VUNSET) == 0) 118 119 void initvar(void); 120 void setvar(const char *, const char *, int); 121 void setvareq(char *, int); 122 struct strlist; 123 void listsetvar(struct strlist *, int); 124 char *lookupvar(const char *); 125 char *bltinlookup(const char *, int); 126 void bltinsetlocale(void); 127 void bltinunsetlocale(void); 128 void updatecharset(void); 129 void initcharset(void); 130 char **environment(void); 131 int showvarscmd(int, char **); 132 void mklocal(char *); 133 void poplocalvars(void); 134 int unsetvar(const char *); 135 int setvarsafe(const char *, const char *, int); 136