| 1 | /* $NetBSD: var.h,v 1.23 2004/10/02 12:16:53 dsl Exp $ */
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| 2 |
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| 3 | /*-
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| 4 | * Copyright (c) 1991, 1993
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| 5 | * The Regents of the University of California. All rights reserved.
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| 6 | *
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| 7 | * This code is derived from software contributed to Berkeley by
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| 8 | * Kenneth Almquist.
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| 9 | *
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| 10 | * Redistribution and use in source and binary forms, with or without
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| 11 | * modification, are permitted provided that the following conditions
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| 12 | * are met:
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| 13 | * 1. Redistributions of source code must retain the above copyright
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| 14 | * notice, this list of conditions and the following disclaimer.
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| 15 | * 2. Redistributions in binary form must reproduce the above copyright
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| 16 | * notice, this list of conditions and the following disclaimer in the
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| 17 | * documentation and/or other materials provided with the distribution.
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| 18 | * 3. Neither the name of the University nor the names of its contributors
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| 19 | * may be used to endorse or promote products derived from this software
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| 20 | * without specific prior written permission.
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| 21 | *
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| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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| 32 | * SUCH DAMAGE.
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| 33 | *
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| 34 | * @(#)var.h 8.2 (Berkeley) 5/4/95
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| 35 | */
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| 36 |
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| 37 | /*
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| 38 | * Shell variables.
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| 39 | */
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| 40 |
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| 41 | /* flags */
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| 42 | #define VEXPORT 0x01 /* variable is exported */
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| 43 | #define VREADONLY 0x02 /* variable cannot be modified */
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| 44 | #define VSTRFIXED 0x04 /* variable struct is statically allocated */
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| 45 | #define VTEXTFIXED 0x08 /* text is statically allocated */
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| 46 | #define VSTACK 0x10 /* text is allocated on the stack */
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| 47 | #define VUNSET 0x20 /* the variable is not set */
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| 48 | #define VNOFUNC 0x40 /* don't call the callback function */
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| 49 | #define VNOSET 0x80 /* do not set variable - just readonly test */
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| 50 | #ifdef PC_OS2_LIBPATHS
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| 51 | #define VOS2LIBPATH 0x8000 /* OS/2 LIBPATH related variable. */
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| 52 | #endif
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| 53 |
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| 54 |
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| 55 | struct var {
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| 56 | struct var *next; /* next entry in hash list */
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| 57 | int flags; /* flags are defined above */
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| 58 | char *text; /* name=value */
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| 59 | int name_len; /* length of name */
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| 60 | void (*func)(const char *);
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| 61 | /* function to be called when */
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| 62 | /* the variable gets set/unset */
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| 63 | };
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| 64 |
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| 65 |
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| 66 | struct localvar {
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| 67 | struct localvar *next; /* next local variable in list */
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| 68 | struct var *vp; /* the variable that was made local */
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| 69 | int flags; /* saved flags */
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| 70 | char *text; /* saved text */
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| 71 | };
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| 72 |
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| 73 |
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| 74 | struct localvar *localvars;
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| 75 |
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| 76 | #if ATTY
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| 77 | extern struct var vatty;
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| 78 | #endif
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| 79 | extern struct var vifs;
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| 80 | extern struct var vmail;
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| 81 | extern struct var vmpath;
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| 82 | extern struct var vpath;
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| 83 | #ifdef _MSC_VER
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| 84 | extern struct var vpath2;
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| 85 | #endif
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| 86 | extern struct var vps1;
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| 87 | extern struct var vps2;
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| 88 | extern struct var vps4;
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| 89 | #ifndef SMALL
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| 90 | extern struct var vterm;
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| 91 | extern struct var vtermcap;
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| 92 | extern struct var vhistsize;
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| 93 | #endif
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| 94 |
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| 95 | /*
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| 96 | * The following macros access the values of the above variables.
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| 97 | * They have to skip over the name. They return the null string
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| 98 | * for unset variables.
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| 99 | */
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| 100 |
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| 101 | #define ifsval() (vifs.text + 4)
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| 102 | #define ifsset() ((vifs.flags & VUNSET) == 0)
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| 103 | #define mailval() (vmail.text + 5)
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| 104 | #define mpathval() (vmpath.text + 9)
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| 105 | #ifdef _MSC_VER
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| 106 | #define pathval() (vpath.text[5] ? &vpath.text[5] : &vpath2.text[5])
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| 107 | #else
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| 108 | #define pathval() (vpath.text + 5)
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| 109 | #endif
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| 110 | #define ps1val() (vps1.text + 4)
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| 111 | #define ps2val() (vps2.text + 4)
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| 112 | #define ps4val() (vps4.text + 4)
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| 113 | #define optindval() (voptind.text + 7)
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| 114 | #ifndef SMALL
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| 115 | #define histsizeval() (vhistsize.text + 9)
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| 116 | #define termval() (vterm.text + 5)
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| 117 | #endif
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| 118 |
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| 119 | #if ATTY
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| 120 | #define attyset() ((vatty.flags & VUNSET) == 0)
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| 121 | #endif
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| 122 | #define mpathset() ((vmpath.flags & VUNSET) == 0)
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| 123 |
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| 124 | void initvar(void);
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| 125 | void setvar(const char *, const char *, int);
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| 126 | void setvareq(char *, int);
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| 127 | struct strlist;
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| 128 | void listsetvar(struct strlist *, int);
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| 129 | char *lookupvar(const char *);
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| 130 | char *bltinlookup(const char *, int);
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| 131 | char **environment(void);
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| 132 | void shprocvar(void);
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| 133 | int showvars(const char *, int, int);
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| 134 | int exportcmd(int, char **);
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| 135 | int localcmd(int, char **);
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| 136 | void mklocal(const char *, int);
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| 137 | void listmklocal(struct strlist *, int);
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| 138 | void poplocalvars(void);
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| 139 | int setvarcmd(int, char **);
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| 140 | int unsetcmd(int, char **);
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| 141 | int unsetvar(const char *, int);
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| 142 | int setvarsafe(const char *, const char *, int);
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| 143 | void print_quoted(const char *);
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