| /* $NetBSD: var.h,v 1.22 2003/08/07 09:05:39 agc Exp $ */ |
| |
| /*- |
| * Copyright (c) 1991, 1993 |
| * The Regents of the University of California. All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Kenneth Almquist. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * @(#)var.h 8.2 (Berkeley) 5/4/95 |
| */ |
| |
| /* |
| * Shell variables. |
| */ |
| |
| /* flags */ |
| #define VEXPORT 0x01 /* variable is exported */ |
| #define VREADONLY 0x02 /* variable cannot be modified */ |
| #define VSTRFIXED 0x04 /* variable struct is statically allocated */ |
| #define VTEXTFIXED 0x08 /* text is statically allocated */ |
| #define VSTACK 0x10 /* text is allocated on the stack */ |
| #define VUNSET 0x20 /* the variable is not set */ |
| #define VNOFUNC 0x40 /* don't call the callback function */ |
| #define VNOSET 0x80 /* do not set variable - just readonly test */ |
| |
| |
| struct var { |
| struct var *next; /* next entry in hash list */ |
| int flags; /* flags are defined above */ |
| char *text; /* name=value */ |
| void (*func)(const char *); |
| /* function to be called when */ |
| /* the variable gets set/unset */ |
| }; |
| |
| |
| struct localvar { |
| struct localvar *next; /* next local variable in list */ |
| struct var *vp; /* the variable that was made local */ |
| int flags; /* saved flags */ |
| char *text; /* saved text */ |
| }; |
| |
| |
| struct localvar *localvars; |
| |
| #if ATTY |
| extern struct var vatty; |
| #endif |
| extern struct var vifs; |
| extern struct var vmail; |
| extern struct var vmpath; |
| extern struct var vpath; |
| extern struct var vps1; |
| extern struct var vps2; |
| extern struct var vps4; |
| #ifdef KLIBC_SH_HISTORY |
| extern struct var vterm; |
| extern struct var vtermcap; |
| extern struct var vhistsize; |
| #endif |
| |
| /* |
| * The following macros access the values of the above variables. |
| * They have to skip over the name. They return the null string |
| * for unset variables. |
| */ |
| |
| #define ifsval() (vifs.text + 4) |
| #define ifsset() ((vifs.flags & VUNSET) == 0) |
| #define mailval() (vmail.text + 5) |
| #define mpathval() (vmpath.text + 9) |
| #define pathval() (vpath.text + 5) |
| #define ps1val() (vps1.text + 4) |
| #define ps2val() (vps2.text + 4) |
| #define ps4val() (vps4.text + 4) |
| #define optindval() (voptind.text + 7) |
| #ifdef KLIBC_SH_HISTORY |
| #define histsizeval() (vhistsize.text + 9) |
| #define termval() (vterm.text + 5) |
| #endif |
| |
| #if ATTY |
| #define attyset() ((vatty.flags & VUNSET) == 0) |
| #endif |
| #define mpathset() ((vmpath.flags & VUNSET) == 0) |
| |
| void initvar(void); |
| void setvar(const char *, const char *, int); |
| void setvareq(char *, int); |
| struct strlist; |
| void listsetvar(struct strlist *, int); |
| char *lookupvar(const char *); |
| char *bltinlookup(const char *, int); |
| char **environment(void); |
| void shprocvar(void); |
| int showvars(const char *, int, int); |
| int exportcmd(int, char **); |
| int localcmd(int, char **); |
| void mklocal(const char *, int); |
| void listmklocal(struct strlist *, int); |
| void poplocalvars(void); |
| int setvarcmd(int, char **); |
| int unsetcmd(int, char **); |
| int unsetvar(const char *, int); |
| int setvarsafe(const char *, const char *, int); |
| void print_quoted(const char *); |