var.h revision 225736
121259Swollman/*- 221259Swollman * Copyright (c) 1991, 1993 321259Swollman * The Regents of the University of California. All rights reserved. 421259Swollman * 521259Swollman * This code is derived from software contributed to Berkeley by 621259Swollman * Kenneth Almquist. 721259Swollman * 821259Swollman * Redistribution and use in source and binary forms, with or without 921259Swollman * modification, are permitted provided that the following conditions 1021259Swollman * are met: 1121259Swollman * 1. Redistributions of source code must retain the above copyright 1221259Swollman * notice, this list of conditions and the following disclaimer. 1321259Swollman * 2. Redistributions in binary form must reproduce the above copyright 1421259Swollman * notice, this list of conditions and the following disclaimer in the 1521259Swollman * documentation and/or other materials provided with the distribution. 1621259Swollman * 4. Neither the name of the University nor the names of its contributors 1721259Swollman * may be used to endorse or promote products derived from this software 1821259Swollman * without specific prior written permission. 1921259Swollman * 2021259Swollman * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 2121259Swollman * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 2221259Swollman * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2321259Swollman * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 2421259Swollman * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2521259Swollman * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2621259Swollman * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2721259Swollman * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2821259Swollman * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2921259Swollman * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 3021259Swollman * SUCH DAMAGE. 3121259Swollman * 3221259Swollman * @(#)var.h 8.2 (Berkeley) 5/4/95 3321259Swollman * $FreeBSD: stable/9/bin/sh/var.h 223060 2011-06-13 21:03:27Z jilles $ 3450477Speter */ 3521259Swollman 3621259Swollman/* 3721259Swollman * Shell variables. 3821259Swollman */ 3921259Swollman 4021259Swollman/* flags */ 4121259Swollman#define VEXPORT 0x01 /* variable is exported */ 4221259Swollman#define VREADONLY 0x02 /* variable cannot be modified */ 4321259Swollman#define VSTRFIXED 0x04 /* variable struct is statically allocated */ 4421259Swollman#define VTEXTFIXED 0x08 /* text is statically allocated */ 4521259Swollman#define VSTACK 0x10 /* text is allocated on the stack */ 4621259Swollman#define VUNSET 0x20 /* the variable is not set */ 4721259Swollman#define VNOFUNC 0x40 /* don't call the callback function */ 4821259Swollman#define VNOSET 0x80 /* do not set variable - just readonly test */ 4921259Swollman#define VNOLOCAL 0x100 /* ignore forcelocal */ 5021259Swollman 5121259Swollman 5221259Swollmanstruct var { 5321259Swollman struct var *next; /* next entry in hash list */ 5421259Swollman int flags; /* flags are defined above */ 5521259Swollman int name_len; /* length of name */ 5621259Swollman char *text; /* name=value */ 5721259Swollman void (*func)(const char *); 5821259Swollman /* function to be called when */ 5921259Swollman /* the variable gets set/unset */ 6021259Swollman}; 6121259Swollman 6221259Swollman 6321259Swollmanstruct localvar { 6421259Swollman struct localvar *next; /* next local variable in list */ 6521259Swollman struct var *vp; /* the variable that was made local */ 6621259Swollman int flags; /* saved flags */ 6721259Swollman char *text; /* saved text */ 6821259Swollman}; 6921259Swollman 7083366Sjulian 7121259Swollmanstruct localvar *localvars; 7285074Sruextern int forcelocal; 7321259Swollman 7421259Swollmanextern struct var vifs; 7521259Swollmanextern struct var vmail; 7621259Swollmanextern struct var vmpath; 77101849Srwatsonextern struct var vpath; 7821259Swollmanextern struct var vppid; 7921259Swollmanextern struct var vps1; 8069224Sjlemonextern struct var vps2; 8169152Sjlemonextern struct var vps4; 8269224Sjlemon#ifndef NO_HISTORY 8374914Sjhbextern struct var vhistsize; 8474914Sjhbextern struct var vterm; 8583130Sjlemon#endif 8669152Sjlemon 8760938Sjakeextern int localeisutf8; 8860938Sjake/* The parser uses the locale that was in effect at startup. */ 8960938Sjakeextern int initial_localeisutf8; 9072084Sphk 9121259Swollman/* 9221259Swollman * The following macros access the values of the above variables. 9321259Swollman * They have to skip over the name. They return the null string 9421259Swollman * for unset variables. 9521259Swollman */ 9621259Swollman 9721259Swollman#define ifsval() (vifs.text + 4) 9821259Swollman#define ifsset() ((vifs.flags & VUNSET) == 0) 9921259Swollman#define mailval() (vmail.text + 5) 10021259Swollman#define mpathval() (vmpath.text + 9) 10169152Sjlemon#define pathval() (vpath.text + 5) 10221259Swollman#define ps1val() (vps1.text + 4) 10321259Swollman#define ps2val() (vps2.text + 4) 10421259Swollman#define ps4val() (vps4.text + 4) 10521259Swollman#define optindval() (voptind.text + 7) 10621259Swollman#ifndef NO_HISTORY 10721259Swollman#define histsizeval() (vhistsize.text + 9) 10821259Swollman#define termval() (vterm.text + 5) 10984380Smjacob#endif 11084380Smjacob 11184380Smjacob#define mpathset() ((vmpath.flags & VUNSET) == 0) 11284380Smjacob 11386797Sluigivoid initvar(void); 11486797Sluigivoid setvar(const char *, const char *, int); 11586797Sluigivoid setvareq(char *, int); 11686797Sluigistruct strlist; 11786797Sluigivoid listsetvar(struct strlist *, int); 11886797Sluigichar *lookupvar(const char *); 11986797Sluigichar *bltinlookup(const char *, int); 12086797Sluigivoid bltinsetlocale(void); 12186797Sluigivoid bltinunsetlocale(void); 12286797Sluigivoid updatecharset(void); 12386797Sluigivoid initcharset(void); 12486797Sluigichar **environment(void); 12586797Sluigiint showvarscmd(int, char **); 12686797Sluigivoid mklocal(char *); 12786797Sluigivoid poplocalvars(void); 12884380Smjacobint unsetvar(const char *); 12921259Swollmanint setvarsafe(const char *, const char *, int); 13021259Swollman